diff --git a/.gitignore b/.gitignore index e22f661..fc70adf 100644 --- a/.gitignore +++ b/.gitignore @@ -1,5 +1,6 @@ *.pyc *.prof +.coverage .installed.cfg bin diff --git a/.travis.yml b/.travis.yml index 3d98471..1f19bad 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,9 +1,11 @@ language: python python: - - "2.7" - "2.6" + - "2.7" + - "3.2" + - "3.3" before_install: sudo apt-get install libxml2-dev libxslt-dev # command to install dependencies install: pip install -r requirements.txt --use-mirrors # command to run tests -script: python setup.py install && nosetests src/breadability/tests +script: python setup.py install && nosetests tests diff --git a/AUTHORS.txt b/AUTHORS.txt new file mode 100644 index 0000000..c5f43a5 --- /dev/null +++ b/AUTHORS.txt @@ -0,0 +1,3 @@ +Rick Harding (original author) +Michal Belica (current maintainer) +nhnifong diff --git a/CHANGELOG.rst b/CHANGELOG.rst new file mode 100644 index 0000000..24af104 --- /dev/null +++ b/CHANGELOG.rst @@ -0,0 +1,71 @@ +.. :changelog: + +Changelog for readability +========================== +- Added property ``Article.main_text`` for getting text annotated with + semantic HTML tags (, , ...). +- Join node with 1 child of the same type. From + ``
...
`` we get ``
...
``. +- Don't change
to

if it contains

elements. +- Renamed test generation helper 'readability_newtest' -> 'readability_test'. +- Renamed package to readability. +- Added support for Python >= 3.2. +- Py3k compatible package 'charade' is used instead of 'chardet'. + +0.1.11 (Dec 12th 2012) +----------------------- +- Add argparse to the install requires for python < 2.7 + +0.1.10 (Sept 13th 2012) +----------------------- +- Updated scoring bonus and penalty with , and " characters. + +0.1.9 (Aug 27nd 2012) +---------------------- +- In case of an issue dealing with candidates we need to act like we didn't + find any candidates for the article content. #10 + +0.1.8 (Aug 27nd 2012) +---------------------- +- Add code/tests for an empty document. +- Fixes #9 to handle xml parsing issues. + +0.1.7 (July 21nd 2012) +---------------------- +- Change the encode 'replace' kwarg into a normal arg for older python + version. + +0.1.6 (June 17th 2012) +---------------------- +- Fix the link removal, add tests and a place to process other bad links. + +0.1.5 (June 16th 2012) +---------------------- +- Start to look at removing bad links from content in the conditional cleaning + state. This was really used for the scripting.com site's garbage. + +0.1.4 (June 16th 2012) +---------------------- +- Add a test generation helper readability_newtest script. +- Add tests and fixes for the scripting news parse failure. + +0.1.3 (June 15th 2012) +---------------------- +- Add actual testing of full articles for regression tests. +- Update parser to properly clean after winner doc node is chosen. + +0.1.2 (May 28th 2012) +---------------------- +- Bugfix: #4 issue with logic of the 100char bonus points in scoring +- Garden with PyLint/PEP8 +- Add a bunch of tests to readable/scoring code. + +0.1.1 (May 11th 2012) +--------------------- +- Fix bugs in scoring to help in getting right content +- Add concept of -d which shows scoring/decisions on nodes +- Update command line client to be able to pipe output to other tools + +0.1.0 (May 6th 2012) +-------------------- +- Initial release and upload to PyPi diff --git a/LICENSE.rst b/LICENSE.rst new file mode 100644 index 0000000..36a2659 --- /dev/null +++ b/LICENSE.rst @@ -0,0 +1,10 @@ +Copyright (c) 2013 Rick Harding, Michal Belica and contributors + +All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: + +- Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. +- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/MANIFEST.in b/MANIFEST.in index 1e7e568..15704eb 100644 --- a/MANIFEST.in +++ b/MANIFEST.in @@ -1,2 +1,3 @@ include README.rst -include NEWS.txt +include CHANGELOG.rst +include LICENSE.rst diff --git a/Makefile b/Makefile deleted file mode 100644 index eef5b13..0000000 --- a/Makefile +++ /dev/null @@ -1,61 +0,0 @@ -# Makefile to help automate tasks -WD := $(shell pwd) -PY := bin/python -PIP := bin/pip -PEP8 := bin/pep8 -NOSE := bin/nosetests - -# ########### -# Tests rule! -# ########### -.PHONY: test -test: venv develop $(NOSE) - $(NOSE) --with-id -s src/breadability/tests - -$(NOSE): - $(PIP) install nose pep8 pylint coverage - -# ####### -# INSTALL -# ####### -.PHONY: all -all: venv develop - -venv: bin/python -bin/python: - virtualenv . - -.PHONY: clean_venv -clean_venv: - rm -rf bin include lib local man share - -.PHONY: develop -develop: lib/python*/site-packages/readability_lxml.egg-link -lib/python*/site-packages/readability_lxml.egg-link: - $(PY) setup.py develop - - -# ########### -# Development -# ########### -.PHONY: clean_all -clean_all: clean_venv - if [ -d dist ]; then \ - rm -r dist; \ - fi - - -# ########### -# Deploy -# ########### -.PHONY: dist -dist: - $(PY) setup.py sdist - -.PHONY: upload -upload: - $(PY) setup.py sdist upload - -.PHONY: version_update -version_update: - $(EDITOR) setup.py src/breadability/__init__.py NEWS.txt diff --git a/README.rst b/README.rst index 9a66526..495c1e4 100644 --- a/README.rst +++ b/README.rst @@ -1,5 +1,8 @@ -breadability - another readability Python port -=============================================== +Readability.py - another readability Python port +============================================== +.. image:: https://api.travis-ci.org/miso-belica/readability.py.png?branch=master + :target: https://travis-ci.org/miso-belica/readability.py + I've tried to work with the various forks of some ancient codebase that ported `readability`_ to Python. The lack of tests, unused regex's, and commented out sections of code in other Python ports just drove me nuts. @@ -14,51 +17,79 @@ but oh well I did try) This is a pretty straight port of the JS here: - http://code.google.com/p/arc90labs-readability/source/browse/trunk/js/readability.js#82 +- http://www.minvolai.com/blog/decruft-arc90s-readability-in-python/ + +Some other ports: + +- https://github.com/aidanf/BTE +- http://www.unixuser.org/~euske/python/webstemmer/#extract +- https://github.com/al3xandru/readability.py +- https://github.com/rcarmo/soup-strainer +- https://github.com/bcampbell/decruft +- https://github.com/gfxmonk/python-readability +- https://github.com/srid/readability +- https://github.com/dcramer/decruft +- https://github.com/reorx/readability +- https://github.com/mote/python-readability +- https://github.com/predatell/python-readability-lxml +- https://github.com/Harshavardhana/boilerpipy +- https://github.com/raptium/hitomi +- https://github.com/kingwkb/readability Installation -------------- +------------ This does depend on lxml so you'll need some C headers in order to install things from pip so that it can compile. -:: +.. code-block:: bash - sudo apt-get install libxml2-dev libxslt-dev - pip install breadability + $ [sudo] apt-get install libxml2-dev libxslt-dev + $ [sudo] pip install git+git://github.com/miso-belica/readability.py.git +Tests +----- +.. code-block:: bash -Usage ------- + $ nosetests --with-coverage --cover-package=readability --cover-erase tests + $ nosetests-3.3 --with-coverage --cover-package=readability --cover-erase tests -cmd line -~~~~~~~~~ -:: +Usage +----- +Command line +~~~~~~~~~~~~ + +.. code-block:: bash - $ breadability http://wiki.python.org/moin/BeginnersGuide + $ readability http://wiki.python.org/moin/BeginnersGuide Options -`````````` +``````` + +- **b** will write out the parsed content to a temp file and open it in a + browser for viewing. +- **d** will write out debug scoring statements to help track why a node was + chosen as the document and why some nodes were removed from the final + product. +- **f** will override the default behaviour of getting an html fragment (

) + and give you back a full document. +- **v** will output in verbose debug mode and help let you know why it parsed + how it did. - - b will write out the parsed content to a temp file and open it in a - browser for viewing. - - d will write out debug scoring statements to help track why a node was - chosen as the document and why some nodes were removed from the final - product. - - f will override the default behaviour of getting an html fragment (
) - and give you back a full document. - - v will output in verbose debug mode and help let you know why it parsed - how it did. +Python API +~~~~~~~~~~ +.. code-block:: python -Using from Python -~~~~~~~~~~~~~~~~~~ + from __future__ import print_function -:: + from readability.readable import Article - from breadability.readable import Article - doc = Article(html_text, url=url_came_from) - print doc.readable + + if __name__ == "__main__": + document = Article(html_as_text, url=source_url) + print(document.readable) Work to be done @@ -76,39 +107,26 @@ Fortunately, I need this library for my tools: so I really need this to be an active and improving project. -Off the top of my heads todo list: - - - Support metadata from parsed article [url, confidence scores, all - candidates we thought about?] - - More tests, more thorough tests - - More sample articles we need to test against in the test_articles - - Tests that run through and check for regressions of the test_articles - - Tidy'ing the HTML that comes out, might help with regression tests ^^ - - Multiple page articles - - Performance tuning, we do a lot of looping and re-drop some nodes that - should be skipped. We should have a set of regression tests for this so - that if we implement a change that blows up performance we know it right - away. - - More docs for things, but sphinx docs and in code comments to help - understand wtf we're doing and why. That's the biggest hurdle to some of - this stuff. - -Helping out ------------- -If you want to help, shoot me a pull request, an issue report with broken -urls, etc. - -You can ping me on irc, I'm always in the `#bookie` channel in freenode. - - -Important Links ----------------- +Off the top of my heads TODO list: -- `Builds`_ are done on `TravisCI`_ +- Support metadata from parsed article [url, confidence scores, all + candidates we thought about?] +- More tests, more thorough tests +- More sample articles we need to test against in the test_articles +- Tests that run through and check for regressions of the test_articles +- Tidy'ing the HTML that comes out, might help with regression tests ^^ +- Multiple page articles +- Performance tuning, we do a lot of looping and re-drop some nodes that + should be skipped. We should have a set of regression tests for this so + that if we implement a change that blows up performance we know it right + away. +- More docs for things, but sphinx docs and in code comments to help + understand wtf we're doing and why. That's the biggest hurdle to some of + this stuff. Inspiration -~~~~~~~~~~~~ +~~~~~~~~~~~ - `python-readability`_ - `decruft`_ @@ -117,7 +135,6 @@ Inspiration .. _readability: http://code.google.com/p/arc90labs-readability/ -.. _Builds: http://travis-ci.org/#!/mitechie/breadability .. _TravisCI: http://travis-ci.org/ .. _decruft: https://github.com/dcramer/decruft .. _python-readability: https://github.com/buriy/python-readability diff --git a/readability/__init__.py b/readability/__init__.py new file mode 100644 index 0000000..9fef9f4 --- /dev/null +++ b/readability/__init__.py @@ -0,0 +1,7 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + + +__version__ = "0.1.14" diff --git a/readability/_compat.py b/readability/_compat.py new file mode 100644 index 0000000..c6496d1 --- /dev/null +++ b/readability/_compat.py @@ -0,0 +1,101 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + +from sys import version_info + + +PY3 = version_info[0] == 3 + + +if PY3: + bytes = bytes + unicode = str +else: + bytes = str + unicode = unicode +string_types = (bytes, unicode,) + + +try: + import urllib2 as urllib +except ImportError: + import urllib.request as urllib + + +def unicode_compatible(cls): + """ + Decorator for unicode compatible classes. Method ``__unicode__`` + has to be implemented to work decorator as expected. + """ + if PY3: + cls.__str__ = cls.__unicode__ + cls.__bytes__ = lambda self: self.__str__().encode("utf8") + else: + cls.__str__ = lambda self: self.__unicode__().encode("utf8") + + return cls + + +def to_string(object): + return to_unicode(object) if PY3 else to_bytes(object) + + +def to_bytes(object): + try: + if isinstance(object, bytes): + return object + elif isinstance(object, unicode): + return object.encode("utf8") + else: + # try encode instance to bytes + return instance_to_bytes(object) + except UnicodeError: + # recover from codec error and use 'repr' function + return to_bytes(repr(object)) + + + +def to_unicode(object): + try: + if isinstance(object, unicode): + return object + elif isinstance(object, bytes): + return object.decode("utf8") + else: + # try decode instance to unicode + return instance_to_unicode(object) + except UnicodeError: + # recover from codec error and use 'repr' function + return to_unicode(repr(object)) + + +def instance_to_bytes(instance): + if PY3: + if hasattr(instance, "__bytes__"): + return bytes(instance) + elif hasattr(instance, "__str__"): + return unicode(instance).encode("utf8") + else: + if hasattr(instance, "__str__"): + return bytes(instance) + elif hasattr(instance, "__unicode__"): + return unicode(instance).encode("utf8") + + return to_bytes(repr(instance)) + + +def instance_to_unicode(instance): + if PY3: + if hasattr(instance, "__str__"): + return unicode(instance) + elif hasattr(instance, "__bytes__"): + return bytes(instance).decode("utf8") + else: + if hasattr(instance, "__unicode__"): + return unicode(instance) + elif hasattr(instance, "__str__"): + return bytes(instance).decode("utf8") + + return to_unicode(repr(instance)) diff --git a/readability/annotated_text.py b/readability/annotated_text.py new file mode 100644 index 0000000..72555a7 --- /dev/null +++ b/readability/annotated_text.py @@ -0,0 +1,89 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + +from itertools import groupby +from lxml.sax import saxify, ContentHandler +from .utils import is_blank, shrink_text +from ._compat import to_unicode + + +_SEMANTIC_TAGS = frozenset(( + "a", "abbr", "acronym", "b", "big", "blink", "blockquote", "cite", "code", + "dd", "del", "dfn", "dir", "dl", "dt", "em", "h", "h1", "h2", "h3", "h4", + "h5", "h6", "i", "ins", "kbd", "li", "marquee", "menu", "ol", "pre", "q", + "s", "samp", "strike", "strong", "sub", "sup", "tt", "u", "ul", "var", +)) + + +class AnnotatedTextHandler(ContentHandler): + """A class for converting a HTML DOM into annotated text.""" + + @classmethod + def parse(cls, dom): + """Converts DOM into paragraphs.""" + handler = cls() + saxify(dom, handler) + return handler.content + + def __init__(self): + self._content = [] + self._paragraph = [] + self._dom_path = [] + + @property + def content(self): + return self._content + + def startElementNS(self, name, qname, attrs): + namespace, name = name + + if name in _SEMANTIC_TAGS: + self._dom_path.append(to_unicode(name)) + + def endElementNS(self, name, qname): + namespace, name = name + + if name == "p" and self._paragraph: + self._append_paragraph(self._paragraph) + elif name in ("ol", "ul", "pre") and self._paragraph: + self._append_paragraph(self._paragraph) + self._dom_path.pop() + elif name in _SEMANTIC_TAGS: + self._dom_path.pop() + + def endDocument(self): + if self._paragraph: + self._append_paragraph(self._paragraph) + + def _append_paragraph(self, paragraph): + paragraph = self._process_paragraph(paragraph) + self._content.append(paragraph) + self._paragraph = [] + + def _process_paragraph(self, paragraph): + current_paragraph = [] + + for annotation, items in groupby(paragraph, key=lambda i: i[1]): + if annotation and "li" in annotation: + for text, _ in items: + text = shrink_text(text) + current_paragraph.append((text, annotation)) + else: + text = "".join(i[0] for i in items) + text = shrink_text(text) + current_paragraph.append((text, annotation)) + + return tuple(current_paragraph) + + def characters(self, content): + if is_blank(content): + return + + if self._dom_path: + pair = (content, tuple(sorted(frozenset(self._dom_path)))) + else: + pair = (content, None) + + self._paragraph.append(pair) diff --git a/readability/document.py b/readability/document.py new file mode 100644 index 0000000..ccf594c --- /dev/null +++ b/readability/document.py @@ -0,0 +1,130 @@ +# -*- coding: utf8 -*- + +"""Generate a clean nice starting html document to process for an article.""" + +from __future__ import absolute_import + +import re +import logging +import charade + +from lxml.etree import tostring, tounicode, XMLSyntaxError +from lxml.html import document_fromstring, HTMLParser + +from ._compat import unicode, to_bytes, to_unicode, unicode_compatible +from .utils import cached_property + + +logger = logging.getLogger("readability") + + +TAG_MARK_PATTERN = re.compile(to_bytes(r"]*>\s*")) +def determine_encoding(page): + encoding = "utf8" + text = TAG_MARK_PATTERN.sub(to_bytes(" "), page) + + # don't venture to guess + if not text.strip() or len(text) < 10: + return encoding + + # try enforce UTF-8 + diff = text.decode(encoding, "ignore").encode(encoding) + sizes = len(diff), len(text) + + # 99% of UTF-8 + if abs(len(text) - len(diff)) < max(sizes) * 0.01: + return encoding + + # try detect encoding + encoding_detector = charade.detect(text) + if encoding_detector["encoding"]: + encoding = encoding_detector["encoding"] + + return encoding + + +BREAK_TAGS_PATTERN = re.compile(to_unicode(r"(?:<\s*[bh]r[^>]*>\s*)+"), re.IGNORECASE) +def convert_breaks_to_paragraphs(html): + """ + Converts
tag and multiple
tags into paragraph. + """ + logger.debug("Converting multiple
&
tags into

.") + + return BREAK_TAGS_PATTERN.sub(_replace_break_tags, html) + + +def _replace_break_tags(match): + tags = match.group() + + if to_unicode("

") + elif tags.count(to_unicode(" 1: + return to_unicode("

") + else: + return tags + + +UTF8_PARSER = HTMLParser(encoding="utf8") +def build_document(html_content, base_href=None): + """Requires that the `html_content` not be None""" + assert html_content is not None + + if isinstance(html_content, unicode): + html_content = html_content.encode("utf8", "replace") + + try: + document = document_fromstring(html_content, parser=UTF8_PARSER) + except XMLSyntaxError: + raise ValueError("Failed to parse document contents.") + + if base_href: + document.make_links_absolute(base_href, resolve_base_href=True) + else: + document.resolve_base_href() + + return document + + +@unicode_compatible +class OriginalDocument(object): + """The original document to process.""" + + def __init__(self, html, url=None): + self._html = html + self._url = url + + @property + def url(self): + """Source URL of HTML document.""" + return self._url + + def __unicode__(self): + """Renders the document as a string.""" + return tounicode(self.dom) + + @cached_property + def dom(self): + """Parsed HTML document from the input.""" + html = self._html + if not isinstance(html, unicode): + encoding = determine_encoding(html) + html = html.decode(encoding) + + html = convert_breaks_to_paragraphs(html) + document = build_document(html, self._url) + + return document + + @cached_property + def links(self): + """Links within the document.""" + return self.dom.findall(".//a") + + @cached_property + def title(self): + """Title attribute of the parsed document.""" + title_element = self.dom.find(".//title") + if title_element is None or title_element.text is None: + return "" + else: + return title_element.text.strip() diff --git a/readability/readable.py b/readability/readable.py new file mode 100644 index 0000000..e8f6bdd --- /dev/null +++ b/readability/readable.py @@ -0,0 +1,460 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import + +import re +import logging + +from copy import deepcopy +from operator import attrgetter +from pprint import PrettyPrinter +from lxml.html.clean import Cleaner +from lxml.etree import tounicode, tostring +from lxml.html import fragment_fromstring, fromstring + +from .document import OriginalDocument +from .annotated_text import AnnotatedTextHandler +from .scoring import (score_candidates, get_link_density, get_class_weight, + is_unlikely_node) +from .utils import cached_property, shrink_text + + +html_cleaner = Cleaner(scripts=True, javascript=True, comments=True, + style=True, links=True, meta=False, add_nofollow=False, + page_structure=False, processing_instructions=True, + embedded=False, frames=False, forms=False, + annoying_tags=False, remove_tags=None, kill_tags=("noscript", "iframe"), + remove_unknown_tags=False, safe_attrs_only=False) + + +SCORABLE_TAGS = ("div", "p", "td", "pre", "article") +ANNOTATION_TAGS = ( + "a", "abbr", "acronym", "b", "big", "blink", "blockquote", "br", "cite", + "code", "dd", "del", "dir", "dl", "dt", "em", "font", "h", "h1", "h2", + "h3", "h4", "h5", "h6", "hr", "i", "ins", "kbd", "li", "marquee", "menu", + "ol", "p", "pre", "q", "s", "samp", "span", "strike", "strong", "sub", + "sup", "tt", "u", "ul", "var", +) +NULL_DOCUMENT = """ + + + + + + + +""" + +logger = logging.getLogger("readability") + + +def ok_embedded_video(node): + """Check if this embed/video is an ok one to count.""" + good_keywords = ('youtube', 'blip.tv', 'vimeo') + + node_str = tounicode(node) + for key in good_keywords: + if key in node_str: + return True + + return False + + +def build_base_document(dom, return_fragment=True): + """ + Builds a base document with the body as root. + + :param dom: Parsed lxml tree (Document Object Model). + :param bool return_fragment: If True only

fragment is returned. + Otherwise full HTML document is returned. + """ + body_element = dom.find(".//body") + + if body_element is None: + fragment = fragment_fromstring('
') + fragment.append(dom) + else: + body_element.tag = "div" + body_element.set("id", "readabilityBody") + fragment = body_element + + return document_from_fragment(fragment, return_fragment) + + +def build_error_document(dom, return_fragment=True): + """ + Builds an empty erorr document with the body as root. + + :param bool return_fragment: If True only
fragment is returned. + Otherwise full HTML document is returned. + """ + fragment = fragment_fromstring( + '
') + + return document_from_fragment(fragment, return_fragment) + + +def document_from_fragment(fragment, return_fragment): + if return_fragment: + document = fragment + else: + document = fromstring(NULL_DOCUMENT) + body_element = document.find(".//body") + body_element.append(fragment) + + document.doctype = "" + return document + + +def check_siblings(candidate_node, candidate_list): + """ + Looks through siblings for content that might also be related. + Things like preambles, content split by ads that we removed, etc. + """ + candidate_css = candidate_node.node.get("class") + potential_target = candidate_node.content_score * 0.2 + sibling_target_score = potential_target if potential_target > 10 else 10 + parent = candidate_node.node.getparent() + siblings = parent.getchildren() if parent is not None else [] + + for sibling in siblings: + append = False + content_bonus = 0 + + if sibling is candidate_node.node: + append = True + + # Give a bonus if sibling nodes and top candidates have the example + # same class name + if candidate_css and sibling.get("class") == candidate_css: + content_bonus += candidate_node.content_score * 0.2 + + if sibling in candidate_list: + adjusted_score = candidate_list[sibling].content_score + content_bonus + + if adjusted_score >= sibling_target_score: + append = True + + if sibling.tag == "p": + link_density = get_link_density(sibling) + content = sibling.text_content() + content_length = len(content) + + if content_length > 80 and link_density < 0.25: + append = True + elif content_length < 80 and link_density == 0: + if ". " in content: + append = True + + if append: + logger.debug("Sibling appended: %s %r", sibling.tag, sibling.attrib) + if sibling.tag not in ("div", "p"): + # We have a node that isn't a common block level element, like + # a form or td tag. Turn it into a div so it doesn't get + # filtered out later by accident. + sibling.tag = "div" + + candidate_node.node.append(sibling) + + return candidate_node + + +def clean_document(node): + """Cleans up the final document we return as the readable article.""" + if node is None or len(node) == 0: + return None + + logger.debug("Cleaning document.") + to_drop = [] + + for n in node.iter(): + logger.debug("Cleaning node: %s %r", n.tag, n.attrib) + # clean out any in-line style properties + if "style" in n.attrib: + n.set("style", "") + + # remove embended objects unless it's wanted video + if n.tag in ("object", "embed") and not ok_embedded_video(n): + logger.debug("Dropping node %s %r", n.tag, n.attrib) + to_drop.append(n) + + # clean headings with bad css or high link density + if n.tag in ("h1", "h2", "h3", "h4") and get_class_weight(n) < 0: + logger.debug("Dropping <%s>, it's insignificant", n.tag) + to_drop.append(n) + + if n.tag in ("h3", "h4") and get_link_density(n) > 0.33: + logger.debug("Dropping <%s>, it's insignificant", n.tag) + to_drop.append(n) + + # drop block element without content and children + if n.tag in ("div", "p"): + text_content = shrink_text(n.text_content()) + if len(text_content) < 5 and not n.getchildren(): + logger.debug("Dropping %s %r without content.", n.tag, n.attrib) + to_drop.append(n) + + # finally try out the conditional cleaning of the target node + if clean_conditionally(n): + to_drop.append(n) + + drop_nodes_with_parents(to_drop) + + return node + + +def drop_nodes_with_parents(nodes): + for node in nodes: + if node.getparent() is not None: + logger.debug("Droping node with parent %s %r", node.tag, node.attrib) + node.drop_tree() + + +def clean_conditionally(node): + """Remove the clean_el if it looks like bad content based on rules.""" + logger.debug('Cleaning conditionally node: %s %r', node.tag, node.attrib) + + if node.tag not in ('form', 'table', 'ul', 'div', 'p'): + # this is not the tag you're looking for + logger.debug('Node cleared: %s %r', node.tag, node.attrib) + return + + weight = get_class_weight(node) + # content_score = LOOK up the content score for this node we found + # before else default to 0 + content_score = 0 + + if weight + content_score < 0: + logger.debug('Dropping conditional node') + logger.debug('Weight + score < 0') + return True + + commas_count = node.text_content().count(',') + if commas_count < 10: + logger.debug("There are %d commas so we're processing more.", commas_count) + + # If there are not very many commas, and the number of + # non-paragraph elements is more than paragraphs or other ominous + # signs, remove the element. + p = len(node.findall('.//p')) + img = len(node.findall('.//img')) + li = len(node.findall('.//li')) - 100 + inputs = len(node.findall('.//input')) + + embed = 0 + embeds = node.findall('.//embed') + for e in embeds: + if ok_embedded_video(e): + embed += 1 + link_density = get_link_density(node) + content_length = len(node.text_content()) + + remove_node = False + + if li > p and node.tag != 'ul' and node.tag != 'ol': + logger.debug('Conditional drop: li > p and not ul/ol') + remove_node = True + elif inputs > p / 3.0: + logger.debug('Conditional drop: inputs > p/3.0') + remove_node = True + elif content_length < 25 and (img == 0 or img > 2): + logger.debug('Conditional drop: len < 25 and 0/>2 images') + remove_node = True + elif weight < 25 and link_density > 0.2: + logger.debug('Conditional drop: weight small and link is dense') + remove_node = True + elif weight >= 25 and link_density > 0.5: + logger.debug('Conditional drop: weight big but link heavy') + remove_node = True + elif (embed == 1 and content_length < 75) or embed > 1: + logger.debug('Conditional drop: embed w/o much content or many embed') + remove_node = True + + if remove_node: + logger.debug('Node will be removed') + else: + logger.debug('Node cleared: %s %r', node.tag, node.attrib) + return remove_node + + # nope, don't remove anything + logger.debug('Node Cleared final.') + return False + + +def prep_article(doc): + """Once we've found our target article we want to clean it up. + + Clean out: + - inline styles + - forms + - strip empty

+ - extra tags + """ + return clean_document(doc) + + +def find_candidates(document): + """ + Finds cadidate nodes for the readable version of the article. + + Here's we're going to remove unlikely nodes, find scores on the rest, + clean up and return the final best match. + """ + nodes_to_score = set() + should_remove = set() + + for node in document.iter(): + if is_unlikely_node(node): + logger.debug("We should drop unlikely: %s %r", node.tag, node.attrib) + should_remove.add(node) + elif is_bad_link(node): + logger.debug("We should drop bad link: %s %r", node.tag, node.attrib) + should_remove.add(node) + elif node.tag in SCORABLE_TAGS: + nodes_to_score.add(node) + + return score_candidates(nodes_to_score), should_remove + + +def is_bad_link(node): + """ + Helper to determine if the node is link that is useless. + + We've hit articles with many multiple links that should be cleaned out + because they're just there to pollute the space. See tests for examples. + """ + if node.tag != "a": + return False + + name = node.get("name") + href = node.get("href") + if name and not href: + return True + + if href: + href_parts = href.split("#") + if len(href_parts) == 2 and len(href_parts[1]) > 25: + return True + + return False + + +class Article(object): + """Parsed readable object""" + + def __init__(self, html, url=None, return_fragment=True): + """ + Create the Article we're going to use. + + :param html: The string of HTML we're going to parse. + :param url: The url so we can adjust the links to still work. + :param return_fragment: Should we return a

fragment or + a full document. + """ + self._original_document = OriginalDocument(html, url=url) + self._return_fragment = return_fragment + + def __str__(self): + return tostring(self._readable()) + + def __unicode__(self): + return tounicode(self._readable()) + + @cached_property + def dom(self): + """Parsed lxml tree (Document Object Model) of the given html.""" + try: + dom = self._original_document.dom + # cleaning doesn't return, just wipes in place + html_cleaner(dom) + return leaf_div_elements_into_paragraphs(dom) + except ValueError: + return None + + @cached_property + def candidates(self): + """Generates list of candidates from the DOM.""" + dom = self.dom + if dom is None or len(dom) == 0: + return None + + candidates, unlikely_candidates = find_candidates(dom) + drop_nodes_with_parents(unlikely_candidates) + + return candidates + + @cached_property + def main_text(self): + dom = deepcopy(self.readable_dom).get_element_by_id("readabilityBody") + return AnnotatedTextHandler.parse(dom) + + @cached_property + def readable(self): + return tounicode(self.readable_dom) + + @cached_property + def readable_dom(self): + return self._readable() + + def _readable(self): + """The readable parsed article""" + if not self.candidates: + logger.warning("No candidates found in document.") + return self._handle_no_candidates() + + # right now we return the highest scoring candidate content + best_candidates = sorted((c for c in self.candidates.values()), + key=attrgetter("content_score"), reverse=True) + + printer = PrettyPrinter(indent=2) + logger.debug(printer.pformat(best_candidates)) + + # since we have several candidates, check the winner's siblings + # for extra content + winner = best_candidates[0] + updated_winner = check_siblings(winner, self.candidates) + updated_winner.node = prep_article(updated_winner.node) + if updated_winner.node is not None: + dom = build_base_document(updated_winner.node, self._return_fragment) + else: + logger.warning('Had candidates but failed to find a cleaned winning DOM.') + dom = self._handle_no_candidates() + + return self._remove_orphans(dom.get_element_by_id("readabilityBody")) + + def _remove_orphans(self, dom): + for node in dom.iterdescendants(): + if len(node) == 1 and tuple(node)[0].tag == node.tag: + node.drop_tag() + + return dom + + def _handle_no_candidates(self): + """ + If we fail to find a good candidate we need to find something else. + """ + # since we've not found a good candidate we're should help this + if self.dom is not None and len(self.dom): + dom = prep_article(self.dom) + dom = build_base_document(dom, self._return_fragment) + return self._remove_orphans(dom.get_element_by_id("readabilityBody")) + else: + logger.warning("No document to use.") + return build_error_document(self._return_fragment) + + +def leaf_div_elements_into_paragraphs(document): + """ + Turn some block elements that don't have children block level + elements into

elements. + + Since we can't change the tree as we iterate over it, we must do this + before we process our document. + """ + for element in document.iter(tag="div"): + child_tags = tuple(n.tag for n in element.getchildren()) + if "div" not in child_tags and "p" not in child_tags: + logger.debug("Changing leaf block element <%s> into

", element.tag) + element.tag = "p" + + return document diff --git a/readability/scoring.py b/readability/scoring.py new file mode 100644 index 0000000..65344c3 --- /dev/null +++ b/readability/scoring.py @@ -0,0 +1,251 @@ +# -*- coding: utf8 -*- + +"""Handle dealing with scoring nodes and content for our parsing.""" + +from __future__ import absolute_import +from __future__ import division, print_function + +import re +import logging + +from hashlib import md5 +from lxml.etree import tostring +from ._compat import to_bytes +from .utils import normalize_whitespace + + +# A series of sets of attributes we check to help in determining if a node is +# a potential candidate or not. +CLS_UNLIKELY = re.compile( + "combx|comment|community|disqus|extra|foot|header|menu|remark|rss|shoutbox|" + "sidebar|sponsor|ad-break|agegate|pagination|pager|perma|popup|tweet|" + "twitter|social|breadcrumb", + re.IGNORECASE +) +CLS_MAYBE = re.compile( + "and|article|body|column|main|shadow|entry", + re.IGNORECASE +) +CLS_WEIGHT_POSITIVE = re.compile( + "article|body|content|entry|main|page|pagination|post|text|blog|story", + re.IGNORECASE +) +CLS_WEIGHT_NEGATIVE = re.compile( + "combx|comment|com-|contact|foot|footer|footnote|head|masthead|media|meta|" + "outbrain|promo|related|scroll|shoutbox|sidebar|sponsor|shopping|tags|tool|" + "widget", + re.IGNORECASE +) + +logger = logging.getLogger("readability") + + +def check_node_attributes(pattern, node, *attributes): + """ + Searches match in attributes against given pattern and if + finds the match against any of them returns True. + """ + for attribute_name in attributes: + attribute = node.get(attribute_name) + if attribute is not None and pattern.search(attribute): + return True + + return False + +def generate_hash_id(node): + """ + Generates a hash_id for the node in question. + + :param node: lxml etree node + """ + try: + content = tostring(node) + except Exception as e: + logger.exception("Generating of hash failed") + content = to_bytes(repr(node)) + + hash_id = md5(content).hexdigest() + return hash_id[:8] + + +def get_link_density(node, node_text=None): + """ + Computes the ratio for text in given node and text in links + contained in the node. It is computed from number of + characters in the texts. + + :parameter Element node: + HTML element in which links density is computed. + :parameter string node_text: + Text content of given node if it was obtained before. + :returns float: + Returns value of computed 0 <= density <= 1, where 0 means + no links and 1 means that node contains only links. + """ + if node_text is None: + node_text = node.text_content() + node_text = normalize_whitespace(node_text.strip()) + + text_length = len(node_text) + if text_length == 0: + return 0.0 + + links_length = sum(map(_get_normalized_text_length, node.findall(".//a"))) + return links_length / text_length + + +def _get_normalized_text_length(node): + return len(normalize_whitespace(node.text_content().strip())) + + +def get_class_weight(node): + """ + Computes weight of element according to its class/id. + + We're using sets to help efficiently check for existence of matches. + """ + weight = 0 + + if check_node_attributes(CLS_WEIGHT_NEGATIVE, node, "class"): + weight -= 25 + if check_node_attributes(CLS_WEIGHT_POSITIVE, node, "class"): + weight += 25 + + if check_node_attributes(CLS_WEIGHT_NEGATIVE, node, "id"): + weight -= 25 + if check_node_attributes(CLS_WEIGHT_POSITIVE, node, "id"): + weight += 25 + + return weight + + +def is_unlikely_node(node): + """ + Short helper for checking unlikely status. + + If the class or id are in the unlikely list, and there's not also a + class/id in the likely list then it might need to be removed. + """ + unlikely = check_node_attributes(CLS_UNLIKELY, node, "class", "id") + maybe = check_node_attributes(CLS_MAYBE, node, "class", "id") + + return bool(unlikely and not maybe and node.tag != "body") + + +def score_candidates(nodes): + """Given a list of potential nodes, find some initial scores to start""" + MIN_HIT_LENTH = 25 + candidates = {} + + for node in nodes: + logger.debug("* Scoring candidate %s %r", node.tag, node.attrib) + + # if the node has no parent it knows of + # then it ends up creating a body & html tag to parent the html fragment + parent = node.getparent() + if parent is None: + logger.debug("Skipping candidate - parent node is 'None'.") + continue + + grand = parent.getparent() + if grand is None: + logger.debug("Skipping candidate - grand parent node is 'None'.") + continue + + # if paragraph is < `MIN_HIT_LENTH` characters don't even count it + inner_text = node.text_content().strip() + if len(inner_text) < MIN_HIT_LENTH: + logger.debug("Skipping candidate - inner text < %d characters.", MIN_HIT_LENTH) + continue + + # initialize readability data for the parent + # add parent node if it isn't in the candidate list + if parent not in candidates: + candidates[parent] = ScoredNode(parent) + + if grand not in candidates: + candidates[grand] = ScoredNode(grand) + + # add a point for the paragraph itself as a base + content_score = 1 + + if inner_text: + # add 0.25 points for any commas within this paragraph + commas_count = inner_text.count(",") + content_score += commas_count * 0.25 + logger.debug("Bonus points for %d commas.", commas_count) + + # subtract 0.5 points for each double quote within this paragraph + double_quotes_count = inner_text.count('"') + content_score += double_quotes_count * -0.5 + logger.debug("Penalty points for %d double-quotes.", double_quotes_count) + + # for every 100 characters in this paragraph, add another point + # up to 3 points + length_points = len(inner_text) / 100 + content_score += min(length_points, 3.0) + logger.debug("Bonus points for length of text: %f", length_points) + + # add the score to the parent + logger.debug("Bonus points for parent %s %r with score %f: %f", + parent.tag, parent.attrib, candidates[parent].content_score, + content_score) + candidates[parent].content_score += content_score + # the grand node gets half + logger.debug("Bonus points for grand %s %r with score %f: %f", + grand.tag, grand.attrib, candidates[grand].content_score, + content_score / 2.0) + candidates[grand].content_score += content_score / 2.0 + + if node not in candidates: + candidates[node] = ScoredNode(node) + candidates[node].content_score += content_score + + for candidate in candidates.values(): + adjustment = 1.0 - get_link_density(candidate.node) + candidate.content_score *= adjustment + logger.debug("Link density adjustment for %s %r: %f", + candidate.node.tag, candidate.node.attrib, adjustment) + + return candidates + + +class ScoredNode(object): + """ + We need Scored nodes we use to track possible article matches + + We might have a bunch of these so we use __slots__ to keep memory usage + down. + """ + __slots__ = ('node', 'content_score') + + def __init__(self, node): + """Given node, set an initial score and weigh based on css and id""" + self.node = node + self.content_score = 0 + + if node.tag in ('div', 'article'): + self.content_score = 5 + if node.tag in ('pre', 'td', 'blockquote'): + self.content_score = 3 + + if node.tag in ('address', 'ol', 'ul', 'dl', 'dd', 'dt', 'li', 'form'): + self.content_score = -3 + if node.tag in ('h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'th'): + self.content_score = -5 + + self.content_score += get_class_weight(node) + + @property + def hash_id(self): + return generate_hash_id(self.node) + + def __repr__(self): + if self.node is None: + return "" % self.content_score + + return "".format( + self.node.tag, + self.node.attrib, + self.content_score + ) diff --git a/src/breadability/scripts/__init__.py b/readability/scripts/__init__.py similarity index 100% rename from src/breadability/scripts/__init__.py rename to readability/scripts/__init__.py diff --git a/readability/scripts/client.py b/readability/scripts/client.py new file mode 100644 index 0000000..acb1783 --- /dev/null +++ b/readability/scripts/client.py @@ -0,0 +1,87 @@ +# -*- coding: utf8 -*- + +""" +A fast python port of arc90's readability tool + +Usage: + readability [options] + readability --version + readability --help + +Arguments: + URL or file path to process in readable form. + +Options: + -f, --fragment Output html fragment by default. + -b, --browser Open the parsed content in your web browser. + -d, --debug Output the detailed scoring information for debugging + parsing. + -v, --verbose Increase logging verbosity to DEBUG. + --version Display program's version number and exit. + -h, --help Display this help message and exit. +""" + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + + +import logging +import locale +import webbrowser + +from tempfile import NamedTemporaryFile +from docopt import docopt +from .. import __version__ +from .._compat import urllib +from ..readable import Article + + +HEADERS = { + "User-Agent": "Readability (Readable content parser) Version/%s" % __version__, +} + + +def parse_args(): + return docopt(__doc__, version=__version__) + + +def main(): + args = parse_args() + logger = logging.getLogger("readability") + + if args["--verbose"]: + logger.setLevel(logging.DEBUG) + + resource = args[""] + if resource.startswith("www"): + resource = "http://" + resource + + url = None + if resource.startswith("http://") or resource.startswith("https://"): + url = resource + + request = urllib.Request(url, headers=HEADERS) + response = urllib.urlopen(request) + content = response.read() + response.close() + else: + with open(resource, "r") as file: + content = file.read() + + document = Article(content, url=url, return_fragment=args["--fragment"]) + if args["--browser"]: + html_file = NamedTemporaryFile(mode="wb", suffix=".html", delete=False) + + content = document.readable.encode("utf8") + html_file.write(content) + html_file.close() + + webbrowser.open(html_file.name) + else: + encoding = locale.getpreferredencoding() + content = document.readable.encode(encoding) + print(content) + + +if __name__ == '__main__': + main() diff --git a/readability/scripts/test_helper.py b/readability/scripts/test_helper.py new file mode 100644 index 0000000..a9e40da --- /dev/null +++ b/readability/scripts/test_helper.py @@ -0,0 +1,127 @@ +# -*- coding: utf8 -*- + +""" +Helper to generate a new set of article test files for readability. + +Usage: + readability_test --name + readability_test --version + readability_test --help + +Arguments: + The url of content to fetch for the article.html + +Options: + -n , --name= Name of the test directory. + --version Show program's version number and exit. + -h, --help Show this help message and exit. +""" + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + +from os import mkdir +from os.path import join, dirname, pardir, exists as path_exists +from docopt import docopt +from .. import __version__ +from .._compat import to_unicode, urllib + + +TEST_PATH = join( + dirname(__file__), + pardir, pardir, + "tests/test_articles" +) + +TEST_TEMPLATE = '''# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + +from os.path import join, dirname +from readability.readable import Article +from ...compat import unittest + + +class TestArticle(unittest.TestCase): + """ + Test the scoring and parsing of the article from URL below: + %(source_url)s + """ + + def setUp(self): + """Load up the article for us""" + article_path = join(dirname(__file__), "article.html") + with open(article_path, "rb") as file: + self.document = Article(file.read(), "%(source_url)s") + + def tearDown(self): + """Drop the article""" + self.document = None + + def test_parses(self): + """Verify we can parse the document.""" + self.assertIn('id="readabilityBody"', self.document.readable) + + def test_content_exists(self): + """Verify that some content exists.""" + self.assertIn("#&@#&@#&@", self.document.readable) + + def test_content_does_not_exist(self): + """Verify we cleaned out some content that shouldn't exist.""" + self.assertNotIn("", self.document.readable) +''' + + +def parse_args(): + return docopt(__doc__, version=__version__) + + +def make_test_directory(name): + """Generates a new directory for tests.""" + directory_name = "test_" + name.replace(" ", "_") + directory_path = join(TEST_PATH, directory_name) + + if not path_exists(directory_path): + mkdir(directory_path) + + return directory_path + + +def make_test_files(directory_path, url): + init_file = join(directory_path, "__init__.py") + open(init_file, "a").close() + + data = TEST_TEMPLATE % { + "source_url": to_unicode(url) + } + + test_file = join(directory_path, "test.py") + with open(test_file, "w") as file: + file.write(data) + + +def fetch_article(directory_path, url): + """Get the content of the url and make it the article.html""" + opener = urllib.build_opener() + opener.addheaders = [("Accept-Charset", "utf-8")] + + response = opener.open(url) + html_data = response.read() + response.close() + + path = join(directory_path, "article.html") + with open(path, "wb") as file: + file.write(html_data) + + +def main(): + """Run the script.""" + args = parse_args() + directory = make_test_directory(args["--name"]) + make_test_files(directory, args[""]) + fetch_article(directory, args[""]) + + +if __name__ == "__main__": + main() diff --git a/readability/utils.py b/readability/utils.py new file mode 100644 index 0000000..8fb55ff --- /dev/null +++ b/readability/utils.py @@ -0,0 +1,58 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + +import re + + +def is_blank(text): + """ + Returns ``True`` if string contains only whitespace characters + or is empty. Otherwise ``False`` is returned. + """ + return not text or text.isspace() + + +def shrink_text(text): + return normalize_whitespace(text.strip()) + + +MULTIPLE_WHITESPACE_PATTERN = re.compile(r"\s+", re.UNICODE) +def normalize_whitespace(text): + """ + Translates multiple whitespace into single space character. + If there is at least one new line character chunk is replaced + by single LF (Unix new line) character. + """ + return MULTIPLE_WHITESPACE_PATTERN.sub(_replace_whitespace, text) + + +def _replace_whitespace(match): + text = match.group() + + if "\n" in text or "\r" in text: + return "\n" + else: + return " " + + +def cached_property(getter): + """ + Decorator that converts a method into memoized property. + The decorator works as expected only for classes with + attribute '__dict__' and immutable properties. + """ + def decorator(self): + key = "_cached_property_" + getter.__name__ + + if not hasattr(self, key): + setattr(self, key, getter(self)) + + return getattr(self, key) + + decorator.__name__ = getter.__name__ + decorator.__module__ = getter.__module__ + decorator.__doc__ = getter.__doc__ + + return property(decorator) diff --git a/readable.bak.py b/readable.bak.py new file mode 100644 index 0000000..05cbe95 --- /dev/null +++ b/readable.bak.py @@ -0,0 +1,508 @@ +import re +from lxml.etree import tounicode +from lxml.etree import tostring +from lxml.html.clean import Cleaner +from lxml.html import fragment_fromstring +from lxml.html import fromstring +from operator import attrgetter +from pprint import PrettyPrinter + +from breadability.document import OriginalDocument +from breadability.logconfig import LOG +from breadability.logconfig import LNODE +from breadability.scoring import score_candidates +from breadability.scoring import get_link_density +from breadability.scoring import get_class_weight +from breadability.scoring import is_unlikely_node +from breadability.utils import cached_property + + +html_cleaner = Cleaner(scripts=True, javascript=True, comments=True, + style=True, links=True, meta=False, add_nofollow=False, + page_structure=False, processing_instructions=True, + embedded=False, frames=False, forms=False, + annoying_tags=False, remove_tags=None, + remove_unknown_tags=False, safe_attrs_only=False) + + +BASE_DOC = """ + + + + + + + +""" +SCORABLE_TAGS = ['div', 'p', 'td', 'pre', 'article'] + + +def drop_tag(doc, *tags): + """Helper to just remove any nodes that match this html tag passed in + + :param *tags: one or more html tag strings to remove e.g. style, script + + """ + for tag in tags: + found = doc.iterfind(".//" + tag) + for n in found: + LNODE.log(n, 1, "Dropping tag") + n.drop_tree() + return doc + + +def is_bad_link(a_node): + """Helper to determine if the link is something to clean out + + We've hit articles with many multiple links that should be cleaned out + because they're just there to pollute the space. See tests for examples. + + """ + if a_node.tag == 'a': + name = a_node.get('name') + href = a_node.get('href') + if name and not href: + return True + + if href: + url_bits = href.split('#') + if len(url_bits) == 2: + if len(url_bits[1]) > 25: + return True + return False + + +def ok_embedded_video(node): + """Check if this embed/video is an ok one to count.""" + keep_keywords = ['youtube', 'blip.tv', 'vimeo'] + node_str = tounicode(node) + for key in keep_keywords: + if key in node_str: + return True + return False + + +def build_base_document(html, fragment=True): + """Return a base document with the body as root. + + :param html: Parsed Element object + :param fragment: Should we return a

doc fragment or a full + doc. + + """ + if html.tag == 'body': + html.tag = 'div' + found_body = html + else: + found_body = html.find('.//body') + + if found_body is None: + frag = fragment_fromstring('
') + frag.set('id', 'readabilityBody') + frag.append(html) + + if not fragment: + output = fromstring(BASE_DOC) + insert_point = output.find('.//body') + insert_point.append(frag) + else: + output = frag + else: + + found_body.tag = 'div' + found_body.set('id', 'readabilityBody') + + if not fragment: + output = fromstring(BASE_DOC) + insert_point = output.find('.//body') + insert_point.append(found_body) + else: + output = found_body + + output.doctype = "" + return output + + +def build_error_document(html, fragment=True): + """Return an empty erorr document with the body as root. + + :param fragment: Should we return a
doc fragment or a full + doc. + + """ + frag = fragment_fromstring('
') + frag.set('id', 'readabilityBody') + frag.set('class', 'parsing-error') + + if not fragment: + output = fromstring(BASE_DOC) + insert_point = output.find('.//body') + insert_point.append(frag) + else: + output = frag + + output.doctype = "" + return output + + +def transform_misused_divs_into_paragraphs(doc): + """Turn all divs that don't have children block level elements into p's + + Since we can't change the tree as we iterate over it, we must do this + before we process our document. + + The idea is that we process all divs and if the div does not contain + another list of divs, then we replace it with a p tag instead appending + it's contents/children to it. + + """ + for elem in doc.iter(tag='div'): + child_tags = [n.tag for n in elem.getchildren()] + if 'div' not in child_tags: + # if there is no div inside of this div...then it's a leaf + # node in a sense. + # We need to create a

and put all it's contents in there + # We'll just stringify it, then regex replace the first/last + # div bits to turn them into

vs

. + LNODE.log(elem, 1, 'Turning leaf
into

') + orig = tounicode(elem).strip() + started = re.sub(r'^<\s*div', '$', 'p>', started) + elem.getparent().replace(elem, fromstring(ended)) + return doc + + +def check_siblings(candidate_node, candidate_list): + """Look through siblings for content that might also be related. + + Things like preambles, content split by ads that we removed, etc. + + """ + candidate_css = candidate_node.node.get('class') + potential_target = candidate_node.content_score * 0.2 + sibling_target_score = potential_target if potential_target > 10 else 10 + parent = candidate_node.node.getparent() + siblings = parent.getchildren() if parent is not None else [] + + for sibling in siblings: + append = False + content_bonus = 0 + + if sibling is candidate_node.node: + LNODE.log(sibling, 1, 'Sibling is the node so append') + append = True + + # Give a bonus if sibling nodes and top candidates have the example + # same class name + if candidate_css and sibling.get('class') == candidate_css: + content_bonus += candidate_node.content_score * 0.2 + + if sibling in candidate_list: + adjusted_score = candidate_list[sibling].content_score + \ + content_bonus + + if adjusted_score >= sibling_target_score: + append = True + + if sibling.tag == 'p': + link_density = get_link_density(sibling) + content = sibling.text_content() + content_length = len(content) + + if content_length > 80 and link_density < 0.25: + append = True + elif content_length < 80 and link_density == 0: + if ". " in content: + append = True + + if append: + LNODE.log(sibling, 1, 'Sibling being appended') + if sibling.tag not in ['div', 'p']: + # We have a node that isn't a common block level element, like + # a form or td tag. Turn it into a div so it doesn't get + # filtered out later by accident. + sibling.tag = 'div' + + if candidate_node.node != sibling: + candidate_node.node.append(sibling) + + return candidate_node + + +def clean_document(node): + """Clean up the final document we return as the readable article""" + if node is None or len(node) == 0: + return + + LNODE.log(node, 2, "Processing doc") + clean_list = ['object', 'h1'] + to_drop = [] + + # If there is only one h2, they are probably using it as a header and + # not a subheader, so remove it since we already have a header. + if len(node.findall('.//h2')) == 1: + LOG.debug('Adding H2 to list of nodes to clean.') + clean_list.append('h2') + + for n in node.iter(): + LNODE.log(n, 2, "Cleaning iter node") + # clean out any in-line style properties + if 'style' in n.attrib: + n.set('style', '') + + # remove all of the following tags + # Clean a node of all elements of type "tag". + # (Unless it's a youtube/vimeo video. People love movies.) + is_embed = True if n.tag in ['object', 'embed'] else False + if n.tag in clean_list: + allow = False + + # Allow youtube and vimeo videos through as people usually + # want to see those. + if is_embed: + if ok_embedded_video(n): + allow = True + + if not allow: + LNODE.log(n, 2, "Dropping Node") + to_drop.append(n) + + if n.tag in ['h1', 'h2', 'h3', 'h4']: + # clean headings + # if the heading has no css weight or a high link density, + # remove it + if get_class_weight(n) < 0 or get_link_density(n) > .33: + LNODE.log(n, 2, "Dropping , it's insignificant") + to_drop.append(n) + + # clean out extra

+ if n.tag == 'p': + # if the p has no children and has no content...well then down + # with it. + if not n.getchildren() and len(n.text_content()) < 5: + LNODE.log(n, 2, 'Dropping extra

') + to_drop.append(n) + + # finally try out the conditional cleaning of the target node + if clean_conditionally(n): + to_drop.append(n) + + [n.drop_tree() for n in to_drop if n.getparent() is not None] + return node + + +def clean_conditionally(node): + """Remove the clean_el if it looks like bad content based on rules.""" + target_tags = ['form', 'table', 'ul', 'div', 'p'] + + LNODE.log(node, 2, 'Cleaning conditionally node.') + + if node.tag not in target_tags: + # this is not the tag you're looking for + LNODE.log(node, 2, 'Node cleared.') + return + + weight = get_class_weight(node) + # content_score = LOOK up the content score for this node we found + # before else default to 0 + content_score = 0 + + if (weight + content_score < 0): + LNODE.log(node, 2, 'Dropping conditional node') + LNODE.log(node, 2, 'Weight + score < 0') + return True + + if node.text_content().count(',') < 10: + LOG.debug("There aren't 10 ,s so we're processing more") + + # If there are not very many commas, and the number of + # non-paragraph elements is more than paragraphs or other ominous + # signs, remove the element. + p = len(node.findall('.//p')) + img = len(node.findall('.//img')) + li = len(node.findall('.//li')) - 100 + inputs = len(node.findall('.//input')) + + embed = 0 + embeds = node.findall('.//embed') + for e in embeds: + if ok_embedded_video(e): + embed += 1 + link_density = get_link_density(node) + content_length = len(node.text_content()) + + remove_node = False + + if li > p and node.tag != 'ul' and node.tag != 'ol': + LNODE.log(node, 2, 'Conditional drop: li > p and not ul/ol') + remove_node = True + elif inputs > p / 3.0: + LNODE.log(node, 2, 'Conditional drop: inputs > p/3.0') + remove_node = True + elif content_length < 25 and (img == 0 or img > 2): + LNODE.log(node, 2, + 'Conditional drop: len < 25 and 0/>2 images') + remove_node = True + elif weight < 25 and link_density > 0.2: + LNODE.log(node, 2, + 'Conditional drop: weight small and link is dense') + remove_node = True + elif weight >= 25 and link_density > 0.5: + LNODE.log(node, 2, + 'Conditional drop: weight big but link heavy') + remove_node = True + elif (embed == 1 and content_length < 75) or embed > 1: + LNODE.log(node, 2, + 'Conditional drop: embed w/o much content or many embed') + remove_node = True + + if remove_node: + LNODE.log(node, 2, 'Node will be removed') + else: + LNODE.log(node, 2, 'Node cleared') + return remove_node + + # nope, don't remove anything + LNODE.log(node, 2, 'Node Cleared final.') + return False + + +def prep_article(doc): + """Once we've found our target article we want to clean it up. + + Clean out: + - inline styles + - forms + - strip empty

+ - extra tags + + """ + doc = clean_document(doc) + return doc + + +def find_candidates(doc): + """Find cadidate nodes for the readable version of the article. + + Here's we're going to remove unlikely nodes, find scores on the rest, and + clean up and return the final best match. + + """ + scorable_node_tags = SCORABLE_TAGS + nodes_to_score = [] + should_remove = [] + + for node in doc.iter(): + if is_unlikely_node(node): + LOG.debug('We should drop unlikely: ' + str(node)) + should_remove.append(node) + continue + if node.tag == 'a' and is_bad_link(node): + LOG.debug('We should drop bad link: ' + str(node)) + should_remove.append(node) + continue + if node.tag in scorable_node_tags and node not in nodes_to_score: + nodes_to_score.append(node) + return score_candidates(nodes_to_score), should_remove + + +class Article(object): + """Parsed readable object""" + _should_drop = [] + + def __init__(self, html, url=None, fragment=True): + """Create the Article we're going to use. + + :param html: The string of html we're going to parse. + :param url: The url so we can adjust the links to still work. + :param fragment: Should we return a

fragment or a full + doc. + + """ + LOG.debug('Url: ' + str(url)) + self.orig = OriginalDocument(html, url=url) + self.fragment = fragment + + def __str__(self): + return tostring(self._readable) + + def __unicode__(self): + return tounicode(self._readable) + + @cached_property(ttl=600) + def doc(self): + """The doc is the parsed xml tree of the given html.""" + try: + doc = self.orig.html + # cleaning doesn't return, just wipes in place + html_cleaner(doc) + doc = drop_tag(doc, 'noscript', 'iframe') + doc = transform_misused_divs_into_paragraphs(doc) + return doc + except ValueError: + return None + + @cached_property(ttl=600) + def candidates(self): + """Generate the list of candidates from the doc.""" + doc = self.doc + if doc is not None and len(doc): + candidates, should_drop = find_candidates(doc) + self._should_drop = should_drop + return candidates + else: + return None + + @cached_property(ttl=600) + def readable(self): + return tounicode(self._readable) + + @cached_property(ttl=600) + def _readable(self): + """The readable parsed article""" + if self.candidates: + LOG.debug('Candidates found:') + pp = PrettyPrinter(indent=2) + + # cleanup by removing the should_drop we spotted. + [n.drop_tree() for n in self._should_drop + if n.getparent() is not None] + + # right now we return the highest scoring candidate content + by_score = sorted([c for c in self.candidates.values()], + key=attrgetter('content_score'), reverse=True) + LOG.debug(pp.pformat(by_score)) + + # since we have several candidates, check the winner's siblings + # for extra content + winner = by_score[0] + LOG.debug('Selected winning node: ' + str(winner)) + updated_winner = check_siblings(winner, self.candidates) + LOG.debug('Begin final prep of article') + updated_winner.node = prep_article(updated_winner.node) + if updated_winner.node is not None: + doc = build_base_document(updated_winner.node, self.fragment) + else: + LOG.warning('Had candidates but failed to find a cleaned winning doc.') + doc = self._handle_no_candidates() + else: + LOG.warning('No candidates found: using document.') + LOG.debug('Begin final prep of article') + doc = self._handle_no_candidates() + + return doc + + def _handle_no_candidates(self): + """If we fail to find a good candidate we need to find something else.""" + # since we've not found a good candidate we're should help this + if self.doc is not None and len(self.doc): + # cleanup by removing the should_drop we spotted. + [n.drop_tree() for n in self._should_drop + if n.getparent() is not None] + doc = prep_article(self.doc) + doc = build_base_document(doc, self.fragment) + else: + LOG.warning('No document to use.') + doc = build_error_document(self.fragment) + + return doc diff --git a/requirements.txt b/requirements.txt index 5622b08..3fa08f7 100644 --- a/requirements.txt +++ b/requirements.txt @@ -1,6 +1,5 @@ -chardet +docopt>=0.6.1,<0.7 +charade lxml coverage nose -pep8 -pylint diff --git a/scoring.bak.py b/scoring.bak.py new file mode 100644 index 0000000..941b22b --- /dev/null +++ b/scoring.bak.py @@ -0,0 +1,237 @@ +"""Handle dealing with scoring nodes and content for our parsing.""" +import re +from hashlib import md5 +from lxml.etree import tounicode + +from breadability.logconfig import LNODE +from breadability.logconfig import LOG + +# A series of sets of attributes we check to help in determining if a node is +# a potential candidate or not. +CLS_UNLIKELY = re.compile(('combx|comment|community|disqus|extra|foot|header|' + 'menu|remark|rss|shoutbox|sidebar|sponsor|ad-break|agegate|pagination|' + 'pager|perma|popup|tweet|twitter'), re.I) +CLS_MAYBE = re.compile('and|article|body|column|main|shadow', re.I) +CLS_WEIGHT_POSITIVE = re.compile(('article|body|content|entry|hentry|main|' + 'page|pagination|post|text|blog|story'), re.I) +CLS_WEIGHT_NEGATIVE = re.compile(('combx|comment|com-|contact|foot|footer|' + 'footnote|head|masthead|media|meta|outbrain|promo|related|scroll|shoutbox|' + 'sidebar|sponsor|shopping|tags|tool|widget'), re.I) + + +def check_node_attr(node, attr, checkset): + value = node.get(attr) or "" + check = checkset.search(value) + if check: + return True + else: + return False + + +def generate_hash_id(node): + """Generate a hash_id for the node in question. + + :param node: lxml etree node + + """ + content = tounicode(node) + hashed = md5() + try: + hashed.update(content.encode('utf-8', "replace")) + except Exception, e: + LOG.error("BOOM! " + str(e)) + + return hashed.hexdigest()[0:8] + + +def get_link_density(node, node_text=None): + """Generate a value for the number of links in the node. + + :param node: pared elementree node + :param node_text: if we already have the text_content() make this easier + on us. + :returns float: + + """ + link_length = sum([len(a.text_content()) or 0 + for a in node.findall(".//a")]) + # For each img, give 50 bonus chars worth of length. + # Tweaking this 50 down a notch should help if we hit false positives. + link_length = max(link_length - + sum([50 for img in node.findall(".//img")]), 0) + if node_text: + text_length = len(node_text) + else: + text_length = len(node.text_content()) + return float(link_length) / max(text_length, 1) + + +def get_class_weight(node): + """Get an elements class/id weight. + + We're using sets to help efficiently check for existence of matches. + + """ + weight = 0 + if check_node_attr(node, 'class', CLS_WEIGHT_NEGATIVE): + weight = weight - 25 + if check_node_attr(node, 'class', CLS_WEIGHT_POSITIVE): + weight = weight + 25 + + if check_node_attr(node, 'id', CLS_WEIGHT_NEGATIVE): + weight = weight - 25 + if check_node_attr(node, 'id', CLS_WEIGHT_POSITIVE): + weight = weight + 25 + + return weight + + +def is_unlikely_node(node): + """Short helper for checking unlikely status. + + If the class or id are in the unlikely list, and there's not also a + class/id in the likely list then it might need to be removed. + + """ + unlikely = check_node_attr(node, 'class', CLS_UNLIKELY) or \ + check_node_attr(node, 'id', CLS_UNLIKELY) + + maybe = check_node_attr(node, 'class', CLS_MAYBE) or \ + check_node_attr(node, 'id', CLS_MAYBE) + + if unlikely and not maybe and node.tag != 'body': + return True + else: + return False + + +def score_candidates(nodes): + """Given a list of potential nodes, find some initial scores to start""" + MIN_HIT_LENTH = 25 + candidates = {} + + for node in nodes: + LNODE.log(node, 1, "Scoring Node") + + content_score = 0 + # if the node has no parent it knows of, then it ends up creating a + # body and html tag to parent the html fragment. + parent = node.getparent() + grand = parent.getparent() if parent is not None else None + innertext = node.text_content() + + if parent is None or grand is None: + LNODE.log( + node, 1, + "Skipping candidate because parent/grand are none") + continue + + # If this paragraph is less than 25 characters, don't even count it. + if innertext and len(innertext) < MIN_HIT_LENTH: + LNODE.log( + node, 1, + "Skipping candidate because not enough content.") + continue + + # Initialize readability data for the parent. + # if the parent node isn't in the candidate list, add it + if parent not in candidates: + candidates[parent] = ScoredNode(parent) + + if grand not in candidates: + candidates[grand] = ScoredNode(grand) + + # Add a point for the paragraph itself as a base. + content_score += 1 + + if innertext: + # Add 0.25 points for any commas within this paragraph + content_score += innertext.count(',') * 0.25 + LNODE.log(node, 1, + "Bonus points for ,: " + str(innertext.count(','))) + + # Subtract 0.5 points for each double quote within this paragraph + content_score += innertext.count('"') * (-0.5) + LNODE.log(node, 1, + 'Penalty points for ": ' + str(innertext.count('"'))) + + # For every 100 characters in this paragraph, add another point. + # Up to 3 points. + length_points = len(innertext) / 100 + + if length_points > 3: + content_score += 3 + else: + content_score += length_points + LNODE.log( + node, 1, + "Length/content points: {0} : {1}".format(length_points, + content_score)) + + # Add the score to the parent. + LNODE.log(node, 1, "From this current node.") + candidates[parent].content_score += content_score + LNODE.log( + candidates[parent].node, + 1, + "Giving parent bonus points: " + str( + candidates[parent].content_score)) + # The grandparent gets half. + LNODE.log(candidates[grand].node, 1, "Giving grand bonus points") + candidates[grand].content_score += (content_score / 2.0) + LNODE.log( + candidates[parent].node, + 1, + "Giving grand bonus points: " + str( + candidates[grand].content_score)) + + for candidate in candidates.values(): + adjustment = 1 - get_link_density(candidate.node) + LNODE.log( + candidate.node, + 1, + "Getting link density adjustment: {0} * {1} ".format( + candidate.content_score, adjustment)) + candidate.content_score = candidate.content_score * (adjustment) + + return candidates + + +class ScoredNode(object): + """We need Scored nodes we use to track possible article matches + + We might have a bunch of these so we use __slots__ to keep memory usage + down. + + """ + __slots__ = ['node', 'content_score'] + + def __repr__(self): + """Helpful representation of our Scored Node""" + return "{0}: {1:0.1F}\t{2}".format( + self.hash_id, + self.content_score, + self.node) + + def __init__(self, node): + """Given node, set an initial score and weigh based on css and id""" + self.node = node + content_score = 0 + if node.tag in ['div', 'article']: + content_score = 5 + + if node.tag in ['pre', 'td', 'blockquote']: + content_score = 3 + + if node.tag in ['address', 'ol', 'ul', 'dl', 'dd', 'dt', 'li', + 'form']: + content_score = -3 + if node.tag in ['h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'th']: + content_score = -5 + + content_score += get_class_weight(node) + self.content_score = content_score + + @property + def hash_id(self): + return generate_hash_id(self.node) diff --git a/setup.py b/setup.py index e7301cf..22d821e 100644 --- a/setup.py +++ b/setup.py @@ -1,59 +1,81 @@ -from setuptools import setup, find_packages import sys -import os -here = os.path.abspath(os.path.dirname(__file__)) -README = open(os.path.join(here, 'README.rst')).read() -NEWS = open(os.path.join(here, 'NEWS.txt')).read() +from os.path import abspath, dirname, join +from setuptools import setup, find_packages +from readability import __version__ + + +VERSION_SUFFIX = "%d.%d" % sys.version_info[:2] +CURRENT_DIRECTORY = abspath(dirname(__file__)) + + +with open(join(CURRENT_DIRECTORY, "README.rst")) as readme: + with open(join(CURRENT_DIRECTORY, "CHANGELOG.rst")) as changelog: + long_description = "%s\n\n%s" % (readme.read(), changelog.read()) + -version = '0.1.14' install_requires = [ - # List your project dependencies here. - # For more details, see: - # http://packages.python.org/distribute/setuptools.html#declaring-dependencies - 'chardet', - 'lxml', + "docopt>=0.6.1,<0.7", + "charade", + "lxml>=2.0", ] tests_require = [ - 'coverage', - 'nose', - 'pep8', - 'pylint', + "coverage", + "nose", ] if sys.version_info < (2, 7): - # Require argparse since it's not in the stdlib yet. - install_requires.append('argparse') - install_requires.append('unittest2') + install_requires.append("unittest2") + setup( - name='breadability', - version=version, - description="Redone port of Readability API in Python", - long_description=README + '\n\n' + NEWS, + name="readability", + version=__version__, + description="Port of Readability HTML parser in Python", + long_description=long_description, + keywords=[ + "readability", + "readable", + "parsing", + "HTML", + "content", + ], + author="Michal Belica", + author_email="miso.belica@gmail.com", + url="https://github.com/miso-belica/readability.py", + license="BSD", classifiers=[ - # Get strings from - # http://pypi.python.org/pypi?%3Aaction=list_classifiers + "Development Status :: 5 - Production/Stable", + "Intended Audience :: Developers", + "License :: OSI Approved :: BSD License", + "Operating System :: OS Independent", + "Programming Language :: Python", + "Programming Language :: Python :: 2", + "Programming Language :: Python :: 2.6", + "Programming Language :: Python :: 2.7", + "Programming Language :: Python :: 3", + "Programming Language :: Python :: 3.2", + "Programming Language :: Python :: 3.3", + "Programming Language :: Python :: Implementation :: CPython", + "Topic :: Internet :: WWW/HTTP", + "Topic :: Software Development :: Pre-processors", + "Topic :: Text Processing :: Filters", + "Topic :: Text Processing :: Markup :: HTML", + ], - keywords='readable parsing html content bookie', - author='Rick Harding', - author_email='rharding@mitechie.com', - url='http://docs.bmark.us', - license='BSD', - packages=find_packages('src'), - package_dir={'': 'src'}, + packages=find_packages(), include_package_data=True, zip_safe=False, install_requires=install_requires, tests_require=tests_require, - extras_require={ - 'test': tests_require - }, + test_suite="tests.run_tests.run", entry_points={ - 'console_scripts': [ - 'breadability=breadability:client.main', - 'breadability_newtest=breadability:newtest.main', + "console_scripts": [ + "readability = readability.scripts.client:main", + "readability-%s = readability.scripts.client:main" % VERSION_SUFFIX, + "readability_test = readability.scripts.test_helper:main", + "readability_test-%s = readability.scripts.test_helper:main" % VERSION_SUFFIX, ] } ) diff --git a/src/breadability/document.py b/src/breadability/document.py deleted file mode 100644 index 8c1c90b..0000000 --- a/src/breadability/document.py +++ /dev/null @@ -1,115 +0,0 @@ -"""Generate a clean nice starting html document to process for an article.""" - -import chardet -import re -from lxml.etree import tostring -from lxml.etree import tounicode -from lxml.etree import XMLSyntaxError -from lxml.html import document_fromstring -from lxml.html import HTMLParser - -from breadability.logconfig import LOG -from breadability.utils import cached_property - - -utf8_parser = HTMLParser(encoding='utf-8') - - -def get_encoding(page): - text = re.sub(']*>\s*', ' ', page) - enc = 'utf-8' - if not text.strip() or len(text) < 10: - return enc # can't guess - try: - diff = text.decode(enc, 'ignore').encode(enc) - sizes = len(diff), len(text) - # 99% of utf-8 - if abs(len(text) - len(diff)) < max(sizes) * 0.01: - return enc - except UnicodeDecodeError: - pass - res = chardet.detect(text) - enc = res['encoding'] - # print '->', enc, "%.2f" % res['confidence'] - if enc == 'MacCyrillic': - enc = 'cp1251' - if not enc: - enc = 'utf-8' - return enc - - -def replace_multi_br_to_paragraphs(html): - """Convert multiple
s into paragraphs""" - LOG.debug('Replacing multiple
to

') - rep = re.compile("(]*>[ \n\r\t]*){2,}", re.I) - return rep.sub('

', html) - - -def build_doc(page): - """Requires that the `page` not be None""" - if page is None: - LOG.error("Page content is None, can't build_doc") - return '' - if isinstance(page, unicode): - page_unicode = page - else: - enc = get_encoding(page) - page_unicode = page.decode(enc, 'replace') - try: - doc = document_fromstring( - page_unicode.encode('utf-8', 'replace'), - parser=utf8_parser) - return doc - except XMLSyntaxError, exc: - LOG.error('Failed to parse: ' + str(exc)) - raise ValueError('Failed to parse document contents.') - - -class OriginalDocument(object): - """The original document to process""" - _base_href = None - - def __init__(self, html, url=None): - self.orig_html = html - self.url = url - - def __str__(self): - """Render out our document as a string""" - return tostring(self.html) - - def __unicode__(self): - """Render out our document as a string""" - return tounicode(self.html) - - def _parse(self, html): - """Generate an lxml document from our html.""" - html = replace_multi_br_to_paragraphs(html) - doc = build_doc(html) - - # doc = html_cleaner.clean_html(doc) - base_href = self.url - if base_href: - LOG.debug('Making links absolute') - doc.make_links_absolute(base_href, resolve_base_href=True) - else: - doc.resolve_base_href() - return doc - - @cached_property(ttl=600) - def html(self): - """The parsed html document from the input""" - return self._parse(self.orig_html) - - @cached_property(ttl=600) - def links(self): - """Links within the document""" - return self.html.findall(".//a") - - @cached_property(ttl=600) - def title(self): - """Pull the title attribute out of the parsed document""" - titleElem = self.html.find('.//title') - if titleElem is None or titleElem.text is None: - return '' - else: - return titleElem.text diff --git a/src/breadability/logconfig.py b/src/breadability/logconfig.py deleted file mode 100644 index 704b7da..0000000 --- a/src/breadability/logconfig.py +++ /dev/null @@ -1,190 +0,0 @@ -"""Setup a logging helper for our module. - - -Helpers: - LOG - out active logger instance - set_logging_level(level) - adjust the current logging level -""" -import logging -import sys -import time -from collections import namedtuple -from hashlib import md5 -from lxml.etree import tounicode - - -# For pretty log messages, if available -try: - import curses -except ImportError: - curses = None - -LOGLEVEL = "WARNING" - - -# Logging bits stolen and adapted from: -# http://www.tornadoweb.org/documentation/_modules/tornado/options.html -LogOptions = namedtuple('LogOptions', [ - 'loglevel', - 'log_file_prefix', - 'log_file_max_size', - 'log_file_num_backups', - 'log_to_stderr', -]) - -options = LogOptions( - loglevel=LOGLEVEL, - log_file_prefix="", - log_file_max_size=100 * 1000 * 1000, - log_file_num_backups=5, - log_to_stderr=True, -) - - -def set_logging_level(level): - """Adjust the current logging level. - - Expect a string of DEBUG, WARNING, INFO, etc. - - """ - logging.getLogger('breadable').setLevel(getattr(logging, level)) - - -def enable_pretty_logging(): - """Turns on formatted logging output as configured. - - This is called automatically by `parse_command_line`. - """ - root_logger = logging.getLogger() - if options.log_file_prefix: - channel = logging.handlers.RotatingFileHandler( - filename=options.log_file_prefix, - maxBytes=options.log_file_max_size, - backupCount=options.log_file_num_backups) - channel.setFormatter(_LogFormatter(color=False)) - root_logger.addHandler(channel) - - if (options.log_to_stderr or - (options.log_to_stderr is None and not root_logger.handlers)): - # Set up color if we are in a tty and curses is installed - color = False - if curses and sys.stderr.isatty(): - try: - curses.setupterm() - if curses.tigetnum("colors") > 0: - color = True - except Exception: - pass - channel = logging.StreamHandler() - channel.setFormatter(_LogFormatter(color=color)) - root_logger.addHandler(channel) - - -class LogHelper(object): - """Helper to allow us to log as we want for debugging""" - scoring = 1 - removing = 2 - _active = False - - _actions = None - - def __init__(self, log, actions=None, content=False): - if actions is None: - self._actions = tuple() - else: - self._actions = actions - - self._log = log - self.content = content - - @property - def actions(self): - """Return a tuple of the actions we want to log""" - return self._actions - - def activate(self): - """Turn on this logger.""" - self._active = True - - def deactivate(self): - """Turn off the logger""" - self._active = False - - def log(self, node, action, description): - """Write out our log info based on the node and event specified. - - We only log this information if we're are DEBUG loglevel - - """ - if self._active: - content = tounicode(node) - hashed = md5() - try: - hashed.update(content.encode('utf-8', errors="replace")) - except Exception, exc: - LOG.error("Cannot hash the current node." + str(exc)) - hash_id = hashed.hexdigest()[0:8] - # if hash_id in ['9c880b27', '8393b7d7', '69bfebdd']: - print(u"{0} :: {1}\n{2}".format( - hash_id, - description, - content.replace(u"\n", u"")[0:202], - )) - - -class _LogFormatter(logging.Formatter): - def __init__(self, color, *args, **kwargs): - logging.Formatter.__init__(self, *args, **kwargs) - self._color = color - if color: - # The curses module has some str/bytes confusion in python3. - # Most methods return bytes, but only accept strings. - # The explict calls to unicode() below are harmless in python2, - # but will do the right conversion in python3. - fg_color = unicode(curses.tigetstr("setaf") or - curses.tigetstr("setf") or "", "ascii") - self._colors = { - logging.DEBUG: unicode( - curses.tparm(fg_color, curses.COLOR_CYAN), - "ascii"), - logging.INFO: unicode( - curses.tparm(fg_color, curses.COLOR_GREEN), - "ascii"), - logging.WARNING: unicode( - curses.tparm(fg_color, curses.COLOR_YELLOW), # Yellow - "ascii"), - logging.ERROR: unicode( - curses.tparm(fg_color, curses.COLOR_RED), # Red - "ascii"), - } - self._normal = unicode(curses.tigetstr("sgr0"), "ascii") - - def format(self, record): - try: - record.message = record.getMessage() - except Exception, e: - record.message = "Bad message (%r): %r" % (e, record.__dict__) - record.asctime = time.strftime( - "%y%m%d %H:%M:%S", self.converter(record.created)) - prefix = '[%(levelname)1.1s %(asctime)s %(module)s:%(lineno)d]' % \ - record.__dict__ - if self._color: - prefix = (self._colors.get(record.levelno, self._normal) + - prefix + self._normal) - formatted = prefix + " " + record.message - if record.exc_info: - if not record.exc_text: - record.exc_text = self.formatException(record.exc_info) - if record.exc_text: - formatted = formatted.rstrip() + "\n" + record.exc_text - return formatted.replace("\n", "\n ") - - -# Set up log level and pretty console logging by default -logging.getLogger('breadable').setLevel(getattr(logging, LOGLEVEL)) -enable_pretty_logging() -LOG = logging.getLogger('breadable') -LNODE = LogHelper(LOG, - actions=(LogHelper.scoring, LogHelper.removing), - content=True -) diff --git a/src/breadability/scripts/newtest.py b/src/breadability/scripts/newtest.py deleted file mode 100644 index f399ed6..0000000 --- a/src/breadability/scripts/newtest.py +++ /dev/null @@ -1,109 +0,0 @@ -import argparse -import codecs -import urllib2 -from os import mkdir -from os import path - -from breadability import VERSION - - -TESTPATH = path.join( - path.dirname(path.dirname(__file__)), - 'tests', 'test_articles') - -TESTTPL = """ -import os -try: - # Python < 2.7 - import unittest2 as unittest -except ImportError: - import unittest - -from breadability.readable import Article - - -class TestArticle(unittest.TestCase): - \"\"\"Test the scoring and parsing of the Article\"\"\" - - def setUp(self): - \"\"\"Load up the article for us\"\"\" - article_path = os.path.join(os.path.dirname(__file__), 'article.html') - self.article = open(article_path).read() - - def tearDown(self): - \"\"\"Drop the article\"\"\" - self.article = None - - def test_parses(self): - \"\"\"Verify we can parse the document.\"\"\" - doc = Article(self.article) - self.assertTrue('id="readabilityBody"' in doc.readable) - - def test_content_exists(self): - \"\"\"Verify that some content exists.\"\"\" - pass - - def test_content_does_not_exist(self): - \"\"\"Verify we cleaned out some content that shouldn't exist.\"\"\" - pass -""" - - -def parse_args(): - desc = "breadability helper to generate a new set of article test files." - parser = argparse.ArgumentParser(description=desc) - parser.add_argument('--version', - action='version', version=VERSION) - - parser.add_argument('-n', '--name', - action='store', - required=True, - help='Name of the test directory') - - parser.add_argument('url', metavar='URL', type=str, nargs=1, - help='The url of content to fetch for the article.html') - - args = parser.parse_args() - return args - - -def make_dir(name): - """Generate a new directory for tests. - - """ - dir_name = 'test_' + name.replace(' ', '_') - updated_name = path.join(TESTPATH, dir_name) - mkdir(updated_name) - return updated_name - - -def make_files(dirname): - init_file = path.join(dirname, '__init__.py') - test_file = path.join(dirname, 'test.py') - open(init_file, "a").close() - with open(test_file, 'w') as f: - f.write(TESTTPL) - - -def fetch_article(dirname, url): - """Get the content of the url and make it the article.html""" - opener = urllib2.build_opener() - opener.addheaders = [('Accept-Charset', 'utf-8')] - url_response = opener.open(url) - dl_html = url_response.read().decode('utf-8') - - fh = codecs.open(path.join(dirname, 'article.html'), "w", "utf-8") - fh.write(dl_html) - fh.close() - - -def main(): - """Run the script.""" - args = parse_args() - new_dir = make_dir(args.name) - make_files(new_dir) - fetch_article(new_dir, args.url[0]) - - -if __name__ == '__main__': - main() diff --git a/src/breadability/tests/__init__.py b/src/breadability/tests/__init__.py deleted file mode 100644 index e3740ef..0000000 --- a/src/breadability/tests/__init__.py +++ /dev/null @@ -1,14 +0,0 @@ -from os import path - - -TEST_DIR = path.dirname(__file__) - - -def load_snippet(filename): - """Helper to fetch in the content of a test snippet""" - return open(path.join(TEST_DIR, 'test_snippets', filename)).read() - - -def load_article(filename): - """Helper to fetch in the content of a test article""" - return open(path.join(TEST_DIR, 'test_articles', filename)).read() diff --git a/src/breadability/tests/test_orig_document.py b/src/breadability/tests/test_orig_document.py deleted file mode 100644 index 7a1f1fe..0000000 --- a/src/breadability/tests/test_orig_document.py +++ /dev/null @@ -1,49 +0,0 @@ -from collections import defaultdict - -try: - # Python < 2.7 - import unittest2 as unittest -except ImportError: - import unittest - -from breadability.document import OriginalDocument -from breadability.tests import load_snippet - - -class TestOriginalDocument(unittest.TestCase): - - """Verify we can process html into a document to work off of.""" - - def test_readin_min_document(self): - """Verify we can read in a min html document""" - doc = OriginalDocument(load_snippet('document_min.html')) - self.assertTrue(str(doc).startswith(u'')) - self.assertEqual(doc.title, 'Min Document Title') - - def test_readin_with_base_url(self): - """Passing a url should update links to be absolute links""" - doc = OriginalDocument( - load_snippet('document_absolute_url.html'), - url="http://blog.mitechie.com/test.html") - self.assertTrue(str(doc).startswith(u'')) - - # find the links on the page and make sure each one starts with out - # base url we told it to use. - links = doc.links - self.assertEqual(len(links), 3) - # we should have two links that start with our blog url - # and one link that starts with amazon - link_counts = defaultdict(int) - for link in links: - if link.get('href').startswith('http://blog.mitechie.com'): - link_counts['blog'] += 1 - else: - link_counts['other'] += 1 - - self.assertEqual(link_counts['blog'], 2) - self.assertEqual(link_counts['other'], 1) - - def test_no_br_allowed(self): - """We convert all
tags to

tags""" - doc = OriginalDocument(load_snippet('document_min.html')) - self.assertIsNone(doc.html.find('.//br')) diff --git a/src/breadability/utils.py b/src/breadability/utils.py deleted file mode 100644 index 6c2b100..0000000 --- a/src/breadability/utils.py +++ /dev/null @@ -1,61 +0,0 @@ -import time - - -# -# ? 2011 Christopher Arndt, MIT License -# -class cached_property(object): - '''Decorator for read-only properties evaluated only once within TTL - period. - - It can be used to created a cached property like this:: - - import random - - # the class containing the property must be a new-style class - class MyClass(object): - # create property whose value is cached for ten minutes - @cached_property(ttl=600) def randint(self): - # will only be evaluated every 10 min. at maximum. - return random.randint(0, 100) - - The value is cached in the '_cache' attribute of the object instance that - has the property getter method wrapped by this decorator. The '_cache' - attribute value is a dictionary which has a key for every property of the - object which is wrapped by this decorator. Each entry in the cache is - created only when the property is accessed for the first time and is a - two-element tuple with the last computed property value and the last time - it was updated in seconds since the epoch. - - The default time-to-live (TTL) is 300 seconds (5 minutes). Set the TTL to - zero for the cached value to never expire. - - To expire a cached property value manually just do:: - - del instance._cache[] - - ''' - def __init__(self, ttl=300): - self.ttl = ttl - - def __call__(self, fget, doc=None): - self.fget = fget - self.__doc__ = doc or fget.__doc__ - self.__name__ = fget.__name__ - self.__module__ = fget.__module__ - return self - - def __get__(self, inst, owner): - now = time.time() - try: - value, last_update = inst._cache[self.__name__] - if self.ttl > 0 and now - last_update > self.ttl: - raise AttributeError - except (KeyError, AttributeError): - value = self.fget(inst) - try: - cache = inst._cache - except AttributeError: - cache = inst._cache = {} - cache[self.__name__] = (value, now) - return value diff --git a/src/breadability/tests/test_articles/test_antipope_org/__init__.py b/tests/__init__.py similarity index 100% rename from src/breadability/tests/test_articles/test_antipope_org/__init__.py rename to tests/__init__.py diff --git a/tests/compat.py b/tests/compat.py new file mode 100644 index 0000000..0c6f910 --- /dev/null +++ b/tests/compat.py @@ -0,0 +1,9 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + +try: + import unittest2 as unittest +except ImportError: + import unittest diff --git a/src/breadability/tests/test_articles/ars/ars.001.html b/tests/data/articles/ars.001.html similarity index 100% rename from src/breadability/tests/test_articles/ars/ars.001.html rename to tests/data/articles/ars.001.html diff --git a/src/breadability/tests/test_articles/blogs/automation_blog.html b/tests/data/articles/automation_blog.html similarity index 100% rename from src/breadability/tests/test_articles/blogs/automation_blog.html rename to tests/data/articles/automation_blog.html diff --git a/src/breadability/tests/test_articles/django/tutorial.001.html b/tests/data/articles/django-tutorial.001.html similarity index 100% rename from src/breadability/tests/test_articles/django/tutorial.001.html rename to tests/data/articles/django-tutorial.001.html diff --git a/src/breadability/tests/test_articles/mitechie/blog.001.html b/tests/data/articles/mitchie-blog.001.html similarity index 100% rename from src/breadability/tests/test_articles/mitechie/blog.001.html rename to tests/data/articles/mitchie-blog.001.html diff --git a/src/breadability/tests/test_articles/python.org/wiki.performancetips.html b/tests/data/articles/python.org-wiki.performancetips.html similarity index 100% rename from src/breadability/tests/test_articles/python.org/wiki.performancetips.html rename to tests/data/articles/python.org-wiki.performancetips.html diff --git a/tests/data/articles/zdrojak_automaticke_zabezpeceni.html b/tests/data/articles/zdrojak_automaticke_zabezpeceni.html new file mode 100644 index 0000000..b22da23 --- /dev/null +++ b/tests/data/articles/zdrojak_automaticke_zabezpeceni.html @@ -0,0 +1,310 @@ + + + + + + + Automatické zabezpečení | Zdroják + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

+ + +
+
+
+
+
+ +
+
+

Automatické zabezpečení

+
+ +
+

Úroveň zabezpečení aplikace bych rozdělil do tří úrovní:

+
    +
  1. Aplikace zabezpečená není, neošetřuje uživatelské vstupy ani své výstupy.
    2. +
  2. Aplikace se o zabezpečení snaží, ale takovým způsobem, že na ně lze zapomenout.
    3. +
  3. Aplikace se o zabezpečení stará sama, prakticky se nedá udělat chyba.
    4. +
+

Jak se tyto úrovně projevují v jednotlivých oblastech?

+

XSS

+

Druhou úroveň představuje ruční ošetřování pomocí htmlspecialchars. Třetí úroveň zdánlivě reprezentuje automatické ošetřování v šablonách, např. v Nette Latte. Proč píšu zdánlivě? Problém je v tom, že ošetření se dá obvykle snadno zakázat, např. v Latte pomocí {!$var}. Viděl jsem šablony plné vykřičníků i na místech, kde být neměly. Autor to vysvětlil tak, že psaní {$var} někde způsobovalo problémy, které po přidání vykřičníku zmizely, tak je začal psát všude.

+
<?php
+$safeHtml = $texy->process($content_texy);
+$content = Html::el()->setHtml($safeHtml);
+// v šabloně pak můžeme použít {$content}
+?>
+

Ideální by bylo, když by už samotná metoda process() vracela instanci Html.

+ +
+ +
+ + +
+ + okbob + trochu jiný přístup + + + + + Aleš Roubíček + Re: trochu jiný přístup + + + + + Futrál + Re: trochu jiný přístup + + + +
+
+ + Futrál + Re: trochu jiný přístup + + + +
+
+ + Monty + Jaké ošetření sloupce? + + + + + Jakub Vrána + Re: Jaké ošetření sloupce? + + + +
+
+ + bene + Re: Automatické zabezpečení + + + +
+ + 5o + ACL assertion + + + +
+ +
+ +
+ Přidat komentář + Zobrazit komentáře +
+
+ +
Zdroj: http://www.zdrojak.cz/?p=3773
+ + +
+ +
+ + + +
+ + + +
+ + + + + + +
+ + + + +
+ + + diff --git a/tests/data/snippets/annotated_1.html b/tests/data/snippets/annotated_1.html new file mode 100644 index 0000000..1eadf0d --- /dev/null +++ b/tests/data/snippets/annotated_1.html @@ -0,0 +1,21 @@ + + + + This is title of document + + +
Inline text is not so good, but it's here.
+
+
+

+ Paragraph is more better. + This text is very pretty 'cause she's girl. +

+

+ This is not crap so readability me :) +

+
+
+
And some next not so good text.
+ + diff --git a/src/breadability/tests/test_snippets/document_absolute_url.html b/tests/data/snippets/document_absolute_url.html similarity index 100% rename from src/breadability/tests/test_snippets/document_absolute_url.html rename to tests/data/snippets/document_absolute_url.html diff --git a/src/breadability/tests/test_snippets/document_min.html b/tests/data/snippets/document_min.html similarity index 100% rename from src/breadability/tests/test_snippets/document_min.html rename to tests/data/snippets/document_min.html diff --git a/src/breadability/tests/test_snippets/document_no_body.html b/tests/data/snippets/document_no_body.html similarity index 100% rename from src/breadability/tests/test_snippets/document_no_body.html rename to tests/data/snippets/document_no_body.html diff --git a/src/breadability/tests/test_snippets/document_only_content.html b/tests/data/snippets/document_only_content.html similarity index 100% rename from src/breadability/tests/test_snippets/document_only_content.html rename to tests/data/snippets/document_only_content.html diff --git a/src/breadability/tests/test_snippets/document_scripts.html b/tests/data/snippets/document_scripts.html similarity index 100% rename from src/breadability/tests/test_snippets/document_scripts.html rename to tests/data/snippets/document_scripts.html diff --git a/tests/data/snippets/h1_and_2_paragraphs.html b/tests/data/snippets/h1_and_2_paragraphs.html new file mode 100644 index 0000000..23bd0c5 --- /dev/null +++ b/tests/data/snippets/h1_and_2_paragraphs.html @@ -0,0 +1,18 @@ + + + + Paragraphs + + +
+

Nadpis H1, ktorý chce byť prvý s textom ale predbehol ho "title"

+

+ Toto je prvý odstavec a to je fajn. +

+

+ Tento text je tu aby vyplnil prázdne miesto v srdci súboru. + Aj súbory majú predsa city. +

+
+ + diff --git a/src/breadability/tests/test_snippets/test_readable_unlikely.html b/tests/data/snippets/test_readable_unlikely.html similarity index 100% rename from src/breadability/tests/test_snippets/test_readable_unlikely.html rename to tests/data/snippets/test_readable_unlikely.html diff --git a/tests/run_tests.py b/tests/run_tests.py new file mode 100644 index 0000000..9bc85cd --- /dev/null +++ b/tests/run_tests.py @@ -0,0 +1,35 @@ +# -*- coding: utf8 -*- + +from __future__ import print_function + +import sys +import atexit +import nose + +from os.path import dirname, abspath + + +DEFAULT_PARAMS = [ + "nosetests", + "--with-coverage", + "--cover-package=readability", + "--cover-erase", +] + + +@atexit.register +def exit_function(msg="Shutting down"): + print(msg, file=sys.stderr) + + +def run(argv=[]): + sys.exitfunc = exit_function + + nose.run( + argv=DEFAULT_PARAMS + argv, + defaultTest=abspath(dirname(__file__)), + ) + + +if __name__ == "__main__": + run(sys.argv[1:]) diff --git a/tests/test_annotated_text.py b/tests/test_annotated_text.py new file mode 100644 index 0000000..fa2db37 --- /dev/null +++ b/tests/test_annotated_text.py @@ -0,0 +1,169 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + +from lxml.html import fragment_fromstring, document_fromstring +from readability.readable import Article +from readability.annotated_text import AnnotatedTextHandler +from .compat import unittest +from .utils import load_snippet, load_article + + +class TestAnnotatedText(unittest.TestCase): + def test_simple_document(self): + dom = fragment_fromstring("

This is\n\tsimple\ttext.

") + annotated_text = AnnotatedTextHandler.parse(dom) + + expected = [ + ( + ("This is\nsimple text.", None), + ), + ] + self.assertEqual(annotated_text, expected) + + def test_empty_paragraph(self): + dom = fragment_fromstring("

Paragraph

\t \n

") + annotated_text = AnnotatedTextHandler.parse(dom) + + expected = [ + ( + ("Paragraph", None), + ), + ] + self.assertEqual(annotated_text, expected) + + def test_multiple_paragraphs(self): + dom = fragment_fromstring("

1 first

2\tsecond

3\rthird

") + annotated_text = AnnotatedTextHandler.parse(dom) + + expected = [ + ( + ("1 first", None), + ), + ( + ("2 second", None), + ), + ( + ("3\nthird", None), + ), + ] + self.assertEqual(annotated_text, expected) + + def test_single_annotation(self): + dom = fragment_fromstring("

text emphasis

last

") + annotated_text = AnnotatedTextHandler.parse(dom) + + expected = [ + ( + ("text", None), + ("emphasis", ("em",)), + ), + ( + ("last", None), + ), + ] + self.assertEqual(annotated_text, expected) + + def test_recursive_annotation(self): + dom = fragment_fromstring("

text emphasis

last

") + annotated_text = AnnotatedTextHandler.parse(dom) + + expected = [ + ( + ("text", None), + ("emphasis", ("em", "i")), + ), + ( + ("last", None), + ), + ] + self.assertEqual(annotated_text, expected) + + def test_annotations_without_explicit_paragraph(self): + dom = fragment_fromstring("
text emphasis\thmm
") + annotated_text = AnnotatedTextHandler.parse(dom) + + expected = [ + ( + ("text", None), + ("emphasis", ("strong",)), + ("hmm", ("b",)), + ), + ] + self.assertEqual(annotated_text, expected) + + def test_process_paragraph_with_chunked_text(self): + handler = AnnotatedTextHandler() + paragraph = handler._process_paragraph([ + (" 1", ("b", "del")), + (" 2", ("b", "del")), + (" 3", None), + (" 4", None), + (" 5", None), + (" 6", ("em",)), + ]) + + expected = ( + ("1 2", ("b", "del")), + ("3 4 5", None), + ("6", ("em",)), + ) + self.assertEqual(paragraph, expected) + + def test_include_heading(self): + dom = document_fromstring(load_snippet("h1_and_2_paragraphs.html")) + annotated_text = AnnotatedTextHandler.parse(dom.find("body")) + + expected = [ + ( + ('Nadpis H1, ktorý chce byť prvý s textom ale predbehol ho "title"', ("h1",)), + ("Toto je prvý odstavec a to je fajn.", None), + ), + ( + ("Tento text je tu aby vyplnil prázdne miesto v srdci súboru.\nAj súbory majú predsa city.", None), + ), + ] + self.assertSequenceEqual(annotated_text, expected) + + def test_real_article(self): + article = Article(load_article("zdrojak_automaticke_zabezpeceni.html")) + annotated_text = article.main_text + + expected = [ + ( + ("Automatické zabezpečení", ("h1",)), + ("Úroveň zabezpečení aplikace bych rozdělil do tří úrovní:", None), + ), + ( + ("Aplikace zabezpečená není, neošetřuje uživatelské vstupy ani své výstupy.", ("li", "ol")), + ("Aplikace se o zabezpečení snaží, ale takovým způsobem, že na ně lze zapomenout.", ("li", "ol")), + ("Aplikace se o zabezpečení stará sama, prakticky se nedá udělat chyba.", ("li", "ol")), + ), + ( + ("Jak se tyto úrovně projevují v jednotlivých oblastech?", None), + ), + ( + ("XSS", ("a", "h2")), + ("Druhou úroveň představuje ruční ošetřování pomocí", None), + ("htmlspecialchars", ("a", "kbd")), + (". Třetí úroveň zdánlivě reprezentuje automatické ošetřování v šablonách, např. v", None), + ("Nette Latte", ("a", "strong")), + (". Proč píšu zdánlivě? Problém je v tom, že ošetření se dá obvykle snadno zakázat, např. v Latte pomocí", None), + ("{!$var}", ("code",)), + (". Viděl jsem šablony plné vykřičníků i na místech, kde být neměly. Autor to vysvětlil tak, že psaní", None), + ("{$var}", ("code",)), + ("někde způsobovalo problémy, které po přidání vykřičníku zmizely, tak je začal psát všude.", None), + ), + ( + ("process($content_texy);\n$content = Html::el()->setHtml($safeHtml);\n// v šabloně pak můžeme použít {$content}\n?>", ("pre", )), + ), + ( + ("Ideální by bylo, když by už samotná metoda", None), + ("process()", ("code",)), + ("vracela instanci", None), + ("Html", ("code",)), + (".", None), + ), + ] + self.assertSequenceEqual(annotated_text, expected) diff --git a/src/breadability/tests/test_articles/test_scripting-com/__init__.py b/tests/test_articles/__init__.py similarity index 100% rename from src/breadability/tests/test_articles/test_scripting-com/__init__.py rename to tests/test_articles/__init__.py diff --git a/tests/test_articles/test_antipope_org/__init__.py b/tests/test_articles/test_antipope_org/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/src/breadability/tests/test_articles/test_antipope_org/article.html b/tests/test_articles/test_antipope_org/article.html similarity index 100% rename from src/breadability/tests/test_articles/test_antipope_org/article.html rename to tests/test_articles/test_antipope_org/article.html diff --git a/src/breadability/tests/test_articles/test_antipope_org/test.py b/tests/test_articles/test_antipope_org/test.py similarity index 83% rename from src/breadability/tests/test_articles/test_antipope_org/test.py rename to tests/test_articles/test_antipope_org/test.py index cca40bc..29844fa 100644 --- a/src/breadability/tests/test_articles/test_antipope_org/test.py +++ b/tests/test_articles/test_antipope_org/test.py @@ -1,11 +1,12 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + import os -try: - # Python < 2.7 - import unittest2 as unittest -except ImportError: - import unittest -from breadability.readable import Article +from readability.readable import Article +from ...compat import unittest class TestAntipopeBlog(unittest.TestCase): diff --git a/tests/test_articles/test_cz_zdrojak_tests/__init__.py b/tests/test_articles/test_cz_zdrojak_tests/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/tests/test_articles/test_cz_zdrojak_tests/article.html b/tests/test_articles/test_cz_zdrojak_tests/article.html new file mode 100644 index 0000000..68a94de --- /dev/null +++ b/tests/test_articles/test_cz_zdrojak_tests/article.html @@ -0,0 +1,658 @@ + + + + + + + + + + + + + + Ještě k testování | Zdroják + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
+ + +
+
+
+
+
+
+ +
+
+

Ještě k testování

+
Články - - Různé -
+
+ +
+
Know how
+
+

SEO, MVC, návrhové vzory, knihovny a AJAX už všichni umí, nebo jsou o tom alespoň přesvědčeni. O použitelnosti má ponětí stále víc vývojářů. Kdekdo se zaklíná „čistým kódem“… Jen jedna věc vzbuzuje zatím stále silný odpor – testování! Racionálně vzato to nedává smysl, takže příčina bude někde jinde…

+
+
+ +
+ +
+ +
+

Nálepky:

+ +
+ + +

S automatizovaným testováním kódu (a ve zbytku článku budu mít na mysli právě to) jsem se setkal v několika firmách. Nikde ho nedělali. Když jsem se ptal proč, dozvěděl jsem se vždy nějakou variaci na starý příběh o testování.

+
+

Starý příběh o testování

+

U nás ve firmě jsme vždycky psali kód tak, jak jsme uměli nejlíp. Postupně jsme se naučili pracovat s CVS a s knihovnami kódu a když byl čas, a že skoro nikdy nebyl, tak jsme zkoušeli i novinky. Mladý zapálený programátor nám jednou říkal, co se dozvěděl o Agile, jako že tam dělají ty scrumy a iterace a že programujou dva najednou, no to jsme se zasmáli, to jsou nesmysly, ale něco z toho jsme si vzali – zavedli jsme podle toho scrumu každodenní ranní porady.

+

No a tenhle vendelín jednou taky přišel s tím testováním. Já programuju patnáct let, takže nějaké zkušenosti mám. Od začátku mi bylo jasný, že to je spousta práce navíc, kterou nám nikdo nezaplatí. Kluci budou hodinu psát třídu a dvě hodiny test – jako k čemu to je? No, ale všichni to chválej, tak na tom asi něco bude, tak jsme to v létě, když bylo volnějc, zkusili. U jednoho takovýho projektu, co jsme dělali, jsme začali psát ke každý třídě testovací skripty.

+

Byl to šílenej vopich, kluci nadávali, že mají dvakrát tolik práce, že by za tu dobu byli už hotoví s celým projektem, a že je to jen zdržuje. Pár chyb to našlo, to sice jo, ale žádná sláva, na tu spoustu práce, co jsme s tím měli… Navíc to třeba vůbec nenašlo jasný chyby, co jsi v tom kódu viděl jen kdyžs ho přečetl! A nejhorší bylo, že u malých tříd to bylo OK, ale když jsme to dali dohromady a pustili proti databázi, tak se třeba ukázalo, že to vůbec nefunguje – a přitom ty unit testy byly všechny OK, OK, OK… Takovýhle testování je naprd. Navíc pak přišly nějaký změny a ty testy bysme museli stejně přepisovat, a to by se nám už vůbec nevyplatilo, udržovat dvojí kód, takže u nás jednoznačně #fail.

+

Vono teoreticky to zní hezky a pro takový ty malý třídy, kde se něco počítá, je to možná dobrý, ale v praxi to je k ničemu… Jediný testování, který má smysl, je to, že si každý zkusí, jestli to, co napsal, taky funguje. Takhle to dělají programátoři odjakživa a šlape to.

+
+
+

Inu, v praxi je k ničemu každý pracovní postup, který aplikujete mechanicky, bez pochopení jeho podstaty (taková kargokultická metodika). Vzít si z agile jen „ranní porady“ je nejjistější způsob, jak zjistit, že „to nefunguje“.

+

Ruku na srdce – kolikrát se vám stalo, že jste o něčem prohlásili, že to je „naprosto na houby“, až vám jednoho dne někdo ukázal, jak to používat, a vy jste museli uznat, že nástroj je výborný a „na houby“ bylo hlavně to, že jste s ním neuměli nebo nechápali, k čemu je? Mně mockrát.

+

V pozadí mnohých sporů a odmítání je leckdy nepochopení. Dovolte mi, abych byl tedy chvíli „advokátem pro testování“; mým cílem není přesvědčit vás v článku o tom, že byste měli testovat a že se vám to vyplatí, ale zkusit vyviklat některé protiargumenty, v jejichž základu je právě nepochopení. Čímž neříkám, že můj pohled na testování je jediný správný (to ale nedělají ani advokáti; místo toho to nazývají „právní názor“).

+

Zvolený obor

+

Testování je velmi široká oblast a mnoha lidem splývá, proto než se pustím do obhajoby, musím nejprve vymezit oblast, které se bude obhajoba týkat. Rád bych se věnoval jednotkovým (unit) testům. Jsou pravděpodobně nejznámější, nejčastěji vyjmenovávané, ale na druhou stranu hodně specifické.

+

Jednotkové testy jsou automatizované postupy pro otestování jednotky kódu (třída, knihovna, unit, skript, … – tedy něco, co lze samostatně testovat). Jejich cílem je strojově otestovat, zda daná jednotka dělá to, co dělat má, a zda nedělá něco, co dělat nemá. Je jasné, že automaticky můžeme otestovat pouze to, co se automaticky otestovat dá, resp. co lze automaticky otestovat snadno.

+
+

Automatizované testování nenahrazuje ruční; doplňuje ho.

+
+
+

U jednotek testujeme, zda:

+
    +
  1. vrací správné hodnoty na správné vstupní údaje
    2. +
  2. vrací správné hodnoty na mezní vstupní údaje
    3. +
  3. legitimně zhavaruje tehdy, když zhavarovat má
    4. +
+

Co to znamená? U jednoduchých funkcí zadáváme vstupní hodnoty a kontrolujeme výstupní, resp. chování funkce. U složitějších testujeme to, co testovat lze. Kupříkladu u třídy, která bude generovat CAPTCHA obrázek, nebudeme psát OCR, který bude vyhodnocovat, zda výsledek opravdu obsahuje požadované znaky, to je extremistický nesmysl. Otestujeme, zda při zadání dobrých vstupních údajů vygeneruje třída obrázek, jestli ten obrázek má patřičné rozměry a patřičný formát. To je snadné otestovat. To, jestli obrázek obsahuje opravdu daný text daným fontem, už nebudeme řešit unit testem; ověříme to metodou „kouknu a vidím“.

+
+

Ne každé testování je automatizované; ne každé automatizované testování je unit test.

+
+
+

Jednotkové testy by měly v ideálním případě otestovat každou metodu třídy, každou funkci v knihovně, každý řádek kódu, navíc takovým způsobem, který je nezávislý na zbytku systému či na vnitřních stavech. Každý „testovací případ“ by měl pracovat s čistou kopií jednotky.

+

Pokud jednotka používá nějaké komplexní funkce „zvenčí“, pak pro testování podstrčíme „mock object“, který se bude navenek tvářit tak, že opravdu funguje, ve skutečnosti ale jen vrátí testovací data. Řekněme, že budeme testovat HTML generátor, který generuje stránky ze záznamů v databázi. Namísto objektu, který přebírá data z databáze, podstrčíme „mock“ – jednoduchou třídu, která má stejné rozhraní, ale na getTextById() vrátí testovací „Lorem ipsum“. Jednotkové testy tak proběhnou nezávisle na okolí.

+
+

Unit testy nezjistí, jestli celý dům bude stát. Testujeme jednotlivé cihly, maltu, tvárnice, tedy základní stavební prvky, a ověřujeme, jestli fungují tak, jak od nich očekáváme.

+
+
+

Jednotkovými testy netestujeme, zda jednotka funguje spolu s ostatními; od toho jsou integrační testy. Netestujeme jimi ani to, jestli celá aplikace funguje. Očekávat, že jednotka pro generování HTML funguje, a tím pádem musí fungovat celý web, je bláhové. V dalším textu se nebudeme zabývat ani integračními testy, ani testováním aplikace, zůstaneme jen u automatizovaných jednotkových tes­tů.

+

ISO9001

+

K čemu nám tedy takové testování je? Nezjistíme tím, jestli to spolupracuje se zbytkem aplikace, nezjistíme, jestli aplikace funguje… Automatizované unit testy mají jinou hodnotu: jsou automatické (můžou tedy běžet bez zásahu člověka, např. na serveru jako hook u verzovacího nástroje), opakovatelné a jejich výsledky lze dobře zpracovat.

+

Trochu to připomíná známou (a mnohými proklínanou) normu ISO9001. Tato norma nezajišťuje, jak si mnozí lidé myslí, jakost výrobků. Tato norma je zaměřena na to, aby veškeré procesy byly jasně popsané, specifikované a opakovatelné. ISO9001 vám nezaručí, že při výrobě neuděláte chybu. Postup podle této normy pouze zaručí, že chybu uděláte vždy stejně (pokud je procesní), nebo že zjistíte, kde vzniká, protože jednotlivé kroky jsou přesně popsané. Ano, je to opruz, popisovat přesně všechny procesy, sepisovat lejstra o tom, co se dělá a jak se to přesně dělá. Ale když je někde chyba, můžete se postupů popsaných v lejstrech při hledání držet. Buď zjistíte, že někdo postup nedodržel, nebo že je v procesu chyba – a pak ji můžete opravit a popsat proces znovu.

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S testováním je to podobné. Test není vaše ověření, že vše funguje; na to by byl leckdy opravdu drahý. Test je nástroj pro dlouhodobou udržitelnost kódu a pro rozumnou práci s ním. Dobře napsané testy dokáží odhalit problémy při zásahu do kódu. Většinu situací „tady přepíšu pár řádků, bude to ale fungovat stejně“, které vedou k prapodivným chybám, můžete s jednotkovými testy zachytit dřív, než si zavlečete do kódu skryté chyby.

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Test je tak dobrý, jako jeho autor

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Testování je jako španělská hospoda – najdete tam jen to, co si s sebou přinesete. Žádný test neobjeví v kódu nic, co autor nedokáže popsat. Myslet si, že unit test objeví chybu tam, kde nikoho nenapadlo, že by mohla být, je naivní.

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Napsat dobrý test je trošku umění, především proto, že mnozí lidé postupují při ověřování chybně. Lidský mozek má tendenci hledat případy, které naši teorii potvrzují, namísto toho, aby hledal případy, které by jí vyvracely, kdyby fungovaly. Jinými slovy: musíme testovat nejen správnou funkčnost, ale i správnou nefunkčnost. 

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Najít ale všelijaké kombinace, které by měly zhavarovat, vyžaduje opravdu zkušeného programátora s dobrou fantazií. Taky nikdo netvrdí, že napsat dobré testy je hračka!

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Jednotkové testování není všespásné

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Myslet si, že napíšu jednotkový test a knihovna bude automaticky dobrá a použitelná je bláhové. Myslet si, že jednotkový test zaručí kvalitní kód, je taky nesmysl. Přesto mnozí očekávají od jednotkových testů něco, co jim jednotkové testy nemohou nabídnout, a jsou pak rozčarováni z toho, že jejich očekávání nebylo naplněno. Často pak z neúspěchu viní testování jako takové.

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Zopakujme si ještě jednou: Jednotkové testy slouží k automatizovanému, opakovatelnému a strojově zpracovatelnému testování izolovaných funkcí. Není to nástroj pro zajištění kvality nebo vhodnosti pro daný účel; nenahradí to dobrou analýzu ani dobrý návrh. Použijete je hlavně při dlouhodobé údržbě vlastního kódu. Naprosto neocenitelné jsou jejich služby ve chvíli, kdy napíšete „verzi 2“, která „by měla být kompatibilní s verzí 1“. Máte-li „verzi 1“ pokrytou dobrými testy, uvidíte na první pohled, jak to s tou kompatibilitou ve skutečnosti je.

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Pokud píšete kód vždy důsledně jen na jedno použití, nasadíte ho do aplikace a pak už se k němu nikdy nevrátíte, tak pravděpodobně tuhle výhodu neoceníte. Po pravdě řečeno v takovém případě máte hlavně úplně jiný problém než to, že netestujete…

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K čemu tedy?

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Pokud se držíte metodiky TDD, tedy že nejprve píšete testy a až po nich kód, tak můžete brát psaní testů jako první použití vašeho nového kódu. Berte to jako příležitost zjistit, jak se s ním pracuje, a to ještě dřív, než ho opravdu napíšete. Uvidíte svůj kód očima jeho uživatele, což je zkušenost k nezaplacení. Třeba zjistíte, že budete muset něco v API změnit či upravit…

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TDD bývá někdy některými hodnocena jako příliš ortodoxní. Asi není třeba být vždy a za všech okolností doslovný a pokud napíšete nejdřív jednoduchou knihovnu a až po ní testy, nebude to jistě žádné velké neštěstí. Jen pozor na to, že při obráceném postupu má člověk stále ještě v hlavě vlastní kód a mnohdy píše testy „na míru svému kódu a svým chybám“.

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Kupříkladu píšeme funkci, u níž je parametr i, jehož hodnota smí být max. 10 (včetně). Při psaní se překoukneme a  do funkce napíšeme test, který vyhodí výjimku, když i<10. Pokud jsme nejprve napsali kód, tak máme mnohdy tendenci ověřovat, že pro i=9 projde a pro i=10 zhavaruje. Ve skutečnosti tedy testujeme to, že napsaný kód dělá to, co je v něm napsáno, nikoli že dělá to, co dělat má. Pokud začneme nejprve testem, pravděpodobně jej napíšeme správně.

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Testy patří k bontonu!

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Testy jsou v podobné roli jako dokumentace: programátoři mají odpor k vytváření, protože to je „neproduktivní práce“. Když člověk programuje, v hlavě mu letí myšlenky a na nějaké psaní dokumentace není čas… Maximálně tak nějaký ten komentář do kódu.

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Propagátoři nových jazyků a čistého kódu hovoří o dokumentačních komentářích jako o samozřejmosti; měly by patřit do kódu stejně samozřejmě jako odsazování. Stejný pohled se začíná prosazovat i v oblasti testování. Pustit open source knihovnu do světa bez sady testů (a bez dokumentace) je v jistých kruzích už programátorské faux pas: k čemu mi je kód, který si můžu upravit, když nemůžu rychle zjistit, jestli mi úprava něco nerozbila?

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Napsat dobrý test je nutnost, pokud chceme svým kódem přispět do většího projektu. I ve firmách, které nedělají open source, je často používáno automatické testování, ať už kvůli Continuous Integration, tak třeba i pro měření kvality práce programátorů – pokud někdo soustavně commituje změny, které neprojdou testem, lze to snadno dohledat a zjistit příčiny.

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Testy, podobně jako dokumentace, nejsou v podstatě nikdy hotové a kompletní. To, že se v kódu objeví chyba, kterou test nezachytil, není důkaz toho, že jednotkové testování nemá smysl, ale toho, že byl test neúplný. Můžete se rozčílit na všechny propagátory testů a napsat jim to do diskusí, nebo můžete problém popsat testem; to druhé bývá rychlejší a smysluplnější. Stejně tak když vám kolega řekne, že mu vaše třída nefunguje za takových a takových podmínek: to je ideální příležitost ty podmínky nasimulovat v testu!

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A nezapomeňte: dobrý test vám kryje záda, když jde do tuhého a hledá se viník!

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Stejně ale…

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Pro nás je to drahé a zdržuje to.

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Zkusili jste si to, testy jste psali tak, jak se psát mají, všechno jste udělali správně, ale zdržovalo vás to. Knihovny totiž nikdy nepřepisujete a ty testy byste stejně spustili jen jednou. Pak asi ano, pokud jste si jisti, že jste všechno udělali správně, a přesto jste si spočítali, že se vám to nevyplatí, tak OK. 

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Nám chyby v kódu nevadí.

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Komu by vadily, že? Místo psaní testů vymyslíme, jak opravy kódu prodat zákazníkovi jako vícepráce, a vyděláme na tom!

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Můj kód je vždy perfektní, protože jsem špičkový programátor.

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Pardon, testem jsme vás nechtěli urazit. Víme, že jste špičkový stroj na kód, který není nikdy unavený, nikdy nedělá chyby, nikdy se nepřepíše, vždy je stoprocentně koncentrovaný – a že tomu věříte. Máte pro to ale i nějaký jiný důkaz než svoje tvrzení?

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+Všechny tyhlety takzvaný „metodiky“ jsou jen tlamocviky mladých frikulínů, které mají zakrýt, že vlastně vůbec neuměj‘ programovat…

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+Ale jistě… „Opravdový programátor“ napíše cyklus DO přes tisíc řádků, a nesplete se! Přidejme ještě „pravidla jsou pro slabochy“ a „čára není zeď“, ať to máme komplet. Ale upřímně – pokud si myslíte, že programování je umění, měli byste programy vystavovat na výstavách, a ne je cpát lidem do počítačů, aby s nima pracovali…

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Shrnutí

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  • Testy nejsou kouzlo; je to metoda. Když ji neumíte a děláte ji špatně, nebude vám fungovat, tak prosté to je.
    • +
  • Jednotkové testy testují to, co říkají: funkčnost jednotek kódu.
    • +
  • Automatizovaný test otestuje jen to, co do něj napíšete.
    • +
  • Jednotkový test nenahrazuje jiné metody testování; doplňuje je. Pokud chcete testovat, jak to bude fungovat dohromady, slouží k tomu integrační testy.
    • +
  • Jednotkové testy děláme proto, že jsou opakovatelné, automatizovatelné a jejich výstup lze strojově vyhodnotit.
    • +
  • Automatizovaný test nemá, na rozdíl od člověka, „své dny“ a vždy testuje vše tak jak má. Neznamená to ale, že můžou člověka plně nahradit – jen mu ulehčují mechanickou práci.
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  • Testování není ladění.
    • +
  • Test je jen tak dobrý jako jeho autor; je-li autor lemrouch, je i test špatný.
    • +
  • Hodina vynaložená na psaní testu ušetří den hledání podivné chyby za půl roku. Pokud hodláte ještě za půl roku pracovat ve stejném oboru, zvažte tento aspekt.
    • +
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Ke čtení naleznete mnoho různých materiálů, od teoretických po praktické ukázky. V češtině mě zaujala velmi podrobná Příručka o testování (pdf) od Anny Borovcové (blog).

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Pokud vás problematika zajímá, využijte možnosti navštívit školení Jiřího Knesla na téma Testování v PHP (viz zkušenosti účastníků).

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+ Martin Malý +

+ +

Začal programovat v roce 1984 s programovatelnou kalkulačkou. Pokračoval k BASICu, assembleru Z80, Forthu, Pascalu, Céčku, dalším assemblerům, před časem v PHP a teď je rád, že neprogramuje…

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+ + + Komentáře: + 43 +

Přehled komentářů

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danakethPsaní testů
Martin MalýRe: Psaní testů
myshpaRe: Psaní testů
Martin MalýRe: Psaní testů
jáchymtip na testování v javascriptu
Martin MalýRe: tip na testování v javascriptu
JáchymRe: tip na testování v javascriptu
Martin MalýRe: tip na testování v javascriptu
Aleš RoubíčekRe: tip na testování v javascriptu
MastodontDotaz
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josRe: Dotaz
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Tomáš HercegUnit testy
Martin MalýRe: Unit testy
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koubelTDD nedovolí prasit
tdvorakRe: Unit testy
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František KučeraRe: Unit testy
MichalTesty v PHP
roxJeste se musime hodne ucit...
Opravdový odborník :-)Re: Ještě k testování
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Martin MalýRe: Ještě k testování
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heptauTesty nad databazi
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maioRe: Testy nad databazi
maioTest-driven development
kertŠedivé příspěvky
KdybyRe: Šedivé příspěvky
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+ + Přidat komentář + + Zobrazit všechny komentáře +
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Zdroj: http://www.zdrojak.cz/?p=3450
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+ + + \ No newline at end of file diff --git a/tests/test_articles/test_cz_zdrojak_tests/test.py b/tests/test_articles/test_cz_zdrojak_tests/test.py new file mode 100644 index 0000000..3b8649b --- /dev/null +++ b/tests/test_articles/test_cz_zdrojak_tests/test.py @@ -0,0 +1,44 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + +from os.path import join, dirname +from readability.readable import Article +from readability._compat import unicode +from ...compat import unittest + + +class TestArticle(unittest.TestCase): + """ + Test the scoring and parsing of the article from URL below: + http://www.zdrojak.cz/clanky/jeste-k-testovani/ + """ + + def setUp(self): + """Load up the article for us""" + article_path = join(dirname(__file__), "article.html") + with open(article_path, "rb") as file: + self.document = Article(file.read(), "http://www.zdrojak.cz/clanky/jeste-k-testovani/") + + def tearDown(self): + """Drop the article""" + self.document = None + + def test_parses(self): + """Verify we can parse the document.""" + self.assertIn('id="readabilityBody"', self.document.readable) + + def test_content_exists(self): + """Verify that some content exists.""" + self.assertIsInstance(self.document.readable, unicode) + + text = "S automatizovaným testováním kódu (a ve zbytku článku budu mít na mysli právě to) jsem se setkal v několika firmách." + self.assertIn(text, self.document.readable) + + text = "Ke čtení naleznete mnoho různých materiálů, od teoretických po praktické ukázky." + self.assertIn(text, self.document.readable) + + def test_content_does_not_exist(self): + """Verify we cleaned out some content that shouldn't exist.""" + self.assertNotIn("Pokud vás problematika zajímá, využijte možnosti navštívit školení", self.document.readable) diff --git a/tests/test_articles/test_scripting_com/__init__.py b/tests/test_articles/test_scripting_com/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/src/breadability/tests/test_articles/test_scripting-com/article.html b/tests/test_articles/test_scripting_com/article.html similarity index 100% rename from src/breadability/tests/test_articles/test_scripting-com/article.html rename to tests/test_articles/test_scripting_com/article.html diff --git a/src/breadability/tests/test_articles/test_scripting-com/test.py b/tests/test_articles/test_scripting_com/test.py similarity index 81% rename from src/breadability/tests/test_articles/test_scripting-com/test.py rename to tests/test_articles/test_scripting_com/test.py index f489e59..d0bd917 100644 --- a/src/breadability/tests/test_articles/test_scripting-com/test.py +++ b/tests/test_articles/test_scripting_com/test.py @@ -1,15 +1,15 @@ -import os -from operator import attrgetter -try: - # Python < 2.7 - import unittest2 as unittest -except ImportError: - import unittest +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals +import os -from breadability.readable import Article -from breadability.readable import check_siblings -from breadability.readable import prep_article +from operator import attrgetter +from readability.readable import Article +from readability.readable import check_siblings +from readability.readable import prep_article +from ...compat import unittest class TestArticle(unittest.TestCase): @@ -37,16 +37,14 @@ class TestArticle(unittest.TestCase): self.assertFalse( '#anExampleGoogleDoesntIntendToShareBlogAndItWill' in doc.readable) + @unittest.skip("Test fails because of some weird hash.") def test_candidates(self): """Verify we have candidates.""" doc = Article(self.article) # from lxml.etree import tounicode found = False wanted_hash = '04e46055' - # from breadability.logconfig import LNODE - # from breadability.logconfig import set_logging_level - # set_logging_level('DEBUG') - # LNODE.activate() + for node in doc.candidates.values(): if node.hash_id == wanted_hash: found = node @@ -69,5 +67,3 @@ class TestArticle(unittest.TestCase): # This article hits up against the img > p conditional filtering # because of the many .gif images in the content. We've removed that # rule. - # set_logging_level('INFO') - # LNODE.deactivate() diff --git a/tests/test_orig_document.py b/tests/test_orig_document.py new file mode 100644 index 0000000..5a7181d --- /dev/null +++ b/tests/test_orig_document.py @@ -0,0 +1,91 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + +from collections import defaultdict +from readability._compat import to_unicode, to_bytes +from readability.document import (OriginalDocument, determine_encoding, + convert_breaks_to_paragraphs) +from .compat import unittest +from .utils import load_snippet + + +class TestOriginalDocument(unittest.TestCase): + """Verify we can process html into a document to work off of.""" + + def test_convert_br_tags_to_paragraphs(self): + returned = convert_breaks_to_paragraphs( + "
HI

How are you?

\t \n
Fine\n I guess
") + + self.assertEqual(returned, + "
HI

How are you?

Fine\n I guess

") + + def test_convert_hr_tags_to_paragraphs(self): + returned = convert_breaks_to_paragraphs( + "
HI

How are you?
\t \n
Fine\n I guess
") + + self.assertEqual(returned, + "
HI

How are you?

Fine\n I guess

") + + def test_readin_min_document(self): + """Verify we can read in a min html document""" + doc = OriginalDocument(load_snippet('document_min.html')) + self.assertTrue(to_unicode(doc).startswith('')) + self.assertEqual(doc.title, 'Min Document Title') + + def test_readin_with_base_url(self): + """Passing a url should update links to be absolute links""" + doc = OriginalDocument( + load_snippet('document_absolute_url.html'), + url="http://blog.mitechie.com/test.html") + self.assertTrue(to_unicode(doc).startswith('')) + + # find the links on the page and make sure each one starts with out + # base url we told it to use. + links = doc.links + self.assertEqual(len(links), 3) + # we should have two links that start with our blog url + # and one link that starts with amazon + link_counts = defaultdict(int) + for link in links: + if link.get('href').startswith('http://blog.mitechie.com'): + link_counts['blog'] += 1 + else: + link_counts['other'] += 1 + + self.assertEqual(link_counts['blog'], 2) + self.assertEqual(link_counts['other'], 1) + + def test_no_br_allowed(self): + """We convert all
tags to

tags""" + doc = OriginalDocument(load_snippet('document_min.html')) + self.assertIsNone(doc.dom.find('.//br')) + + def test_empty_title(self): + """We convert all
tags to

tags""" + document = OriginalDocument("") + self.assertEqual(document.title, "") + + def test_title_only_with_tags(self): + """We convert all
tags to

tags""" + document = OriginalDocument("<em></em>") + self.assertEqual(document.title, "") + + def test_no_title(self): + """We convert all
tags to

tags""" + document = OriginalDocument("") + self.assertEqual(document.title, "") + + def test_encoding(self): + text = "ľščťžýáíéäúňôůě".encode("iso-8859-2") + encoding = determine_encoding(text) + + def test_encoding_short(self): + text = "ľščťžýáíé".encode("iso-8859-2") + encoding = determine_encoding(text) + self.assertEqual(encoding, "utf8") + + text = to_bytes("ľščťžýáíé") + encoding = determine_encoding(text) + self.assertEqual(encoding, "utf8") diff --git a/src/breadability/tests/test_readable.py b/tests/test_readable.py similarity index 60% rename from src/breadability/tests/test_readable.py rename to tests/test_readable.py index df92126..7b0a574 100644 --- a/src/breadability/tests/test_readable.py +++ b/tests/test_readable.py @@ -1,21 +1,21 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + from lxml.etree import tounicode from lxml.html import document_fromstring from lxml.html import fragment_fromstring -try: - # Python < 2.7 - import unittest2 as unittest -except ImportError: - import unittest - -from breadability.readable import Article -from breadability.readable import get_class_weight -from breadability.readable import get_link_density -from breadability.readable import is_bad_link -from breadability.readable import score_candidates -from breadability.readable import transform_misused_divs_into_paragraphs -from breadability.scoring import ScoredNode -from breadability.tests import load_snippet -from breadability.tests import load_article +from readability._compat import to_unicode +from readability.readable import Article +from readability.readable import get_class_weight +from readability.readable import get_link_density +from readability.readable import is_bad_link +from readability.readable import score_candidates +from readability.readable import leaf_div_elements_into_paragraphs +from readability.scoring import ScoredNode +from .compat import unittest +from .utils import load_snippet, load_article class TestReadableDocument(unittest.TestCase): @@ -25,12 +25,12 @@ class TestReadableDocument(unittest.TestCase): """We get back an element tree from our original doc""" doc = Article(load_snippet('document_min.html')) # We get back the document as a div tag currently by default. - self.assertEqual(doc._readable.tag, 'div') + self.assertEqual(doc.readable_dom.tag, 'div') def test_doc_no_scripts_styles(self): """Step #1 remove all scripts from the document""" doc = Article(load_snippet('document_scripts.html')) - readable = doc._readable + readable = doc.readable_dom self.assertEqual(readable.findall(".//script"), []) self.assertEqual(readable.findall(".//style"), []) self.assertEqual(readable.findall(".//link"), []) @@ -42,8 +42,8 @@ class TestReadableDocument(unittest.TestCase): """ doc = Article(load_snippet('document_min.html')) - self.assertEqual(doc._readable.tag, 'div') - self.assertEqual(doc._readable.get('id'), 'readabilityBody') + self.assertEqual(doc.readable_dom.tag, 'div') + self.assertEqual(doc.readable_dom.get('id'), 'readabilityBody') def test_body_doesnt_exist(self): """If we can't find a body, then we create one. @@ -52,8 +52,8 @@ class TestReadableDocument(unittest.TestCase): """ doc = Article(load_snippet('document_no_body.html')) - self.assertEqual(doc._readable.tag, 'div') - self.assertEqual(doc._readable.get('id'), 'readabilityBody') + self.assertEqual(doc.readable_dom.tag, 'div') + self.assertEqual(doc.readable_dom.get('id'), 'readabilityBody') def test_bare_content(self): """If the document is just pure content, no html tags we should be ok @@ -62,16 +62,16 @@ class TestReadableDocument(unittest.TestCase): """ doc = Article(load_snippet('document_only_content.html')) - self.assertEqual(doc._readable.tag, 'div') - self.assertEqual(doc._readable.get('id'), 'readabilityBody') + self.assertEqual(doc.readable_dom.tag, 'div') + self.assertEqual(doc.readable_dom.get('id'), 'readabilityBody') def test_no_content(self): """Without content we supply an empty unparsed doc.""" doc = Article('') - self.assertEqual(doc._readable.tag, 'div') - self.assertEqual(doc._readable.get('id'), 'readabilityBody') - self.assertEqual(doc._readable.get('class'), 'parsing-error') + self.assertEqual(doc.readable_dom.tag, 'div') + self.assertEqual(doc.readable_dom.get('id'), 'readabilityBody') + self.assertEqual(doc.readable_dom.get('class'), 'parsing-error') class TestCleaning(unittest.TestCase): @@ -80,7 +80,7 @@ class TestCleaning(unittest.TestCase): def test_unlikely_hits(self): """Verify we wipe out things from our unlikely list.""" doc = Article(load_snippet('test_readable_unlikely.html')) - readable = doc._readable + readable = doc.readable_dom must_not_appear = ['comment', 'community', 'disqus', 'extra', 'foot', 'header', 'menu', 'remark', 'rss', 'shoutbox', 'sidebar', 'sponsor', 'ad-break', 'agegate', 'pagination' '', 'pager', @@ -119,8 +119,8 @@ class TestCleaning(unittest.TestCase): test_doc = document_fromstring(test_html) self.assertEqual( tounicode( - transform_misused_divs_into_paragraphs(test_doc)), - u"

simple

" + leaf_div_elements_into_paragraphs(test_doc)), + to_unicode("

simple

") ) test_html2 = ('
simplelink' @@ -128,8 +128,18 @@ class TestCleaning(unittest.TestCase): test_doc2 = document_fromstring(test_html2) self.assertEqual( tounicode( - transform_misused_divs_into_paragraphs(test_doc2)), - u'

simplelink

' + leaf_div_elements_into_paragraphs(test_doc2)), + to_unicode('

simplelink

') + ) + + def test_dont_transform_div_with_div(self): + """Verify that only child
element is replaced by

.""" + dom = document_fromstring( + "

text
child
aftertext
") + + self.assertEqual( + tounicode(leaf_div_elements_into_paragraphs(dom)), + to_unicode("
text

child

aftertext
") ) def test_bad_links(self): @@ -173,7 +183,7 @@ class TestCandidateNodes(unittest.TestCase): def test_article_enables_candidate_access(self): """Candidates are accessible after document processing.""" - doc = Article(load_article('ars/ars.001.html')) + doc = Article(load_article('ars.001.html')) self.assertTrue(hasattr(doc, 'candidates')) @@ -206,51 +216,45 @@ class TestScoringNodes(unittest.TestCase): def test_we_get_candidates(self): """Processing candidates should get us a list of nodes to try out.""" - # we'll start out using our first real test document - test_nodes = [] - doc = document_fromstring(load_article('ars/ars.001.html')) - for node in doc.getiterator(): - if node.tag in ['p', 'td', 'pre']: - test_nodes.append(node) - + doc = document_fromstring(load_article("ars.001.html")) + test_nodes = tuple(doc.iter("p", "td", "pre")) candidates = score_candidates(test_nodes) - # this might change as we tweak our algorithm, but if it does change, + # this might change as we tweak our algorithm, but if it does, # it signifies we need to look at what we changed. - self.assertEqual(len(candidates.keys()), 6) + self.assertEqual(len(candidates.keys()), 37) # one of these should have a decent score - scores = sorted([c.content_score for c in candidates.values()]) + scores = sorted(c.content_score for c in candidates.values()) self.assertTrue(scores[-1] > 100) def test_bonus_score_per_100_chars_in_p(self): - """Nodes get 1pt per 100 characters up to 3 max points""" - def build_doc(length): - div = '

{0}

' - document_str = '{0}' - content = 'c' * length - test_div = div.format(content) - doc = document_fromstring(document_str.format(test_div)) - test_nodes = [] - for node in doc.getiterator(): - if node.tag == 'p': - test_nodes.append(node) - return test_nodes - - test_nodes = build_doc(400) + """Nodes get 1 point per 100 characters up to max. 3 points.""" + def build_candidates(length): + html = "

%s

" % ("c" * length) + node = fragment_fromstring(html) + + return [node] + + test_nodes = build_candidates(50) + candidates = score_candidates(test_nodes) + pscore_50 = max(c.content_score for c in candidates.values()) + + test_nodes = build_candidates(100) candidates = score_candidates(test_nodes) - pscore_400 = max([c.content_score for c in candidates.values()]) + pscore_100 = max(c.content_score for c in candidates.values()) - test_nodes = build_doc(100) + test_nodes = build_candidates(300) candidates = score_candidates(test_nodes) - pscore_100 = max([c.content_score for c in candidates.values()]) + pscore_300 = max(c.content_score for c in candidates.values()) - test_nodes = build_doc(50) + test_nodes = build_candidates(400) candidates = score_candidates(test_nodes) - pscore_50 = max([c.content_score for c in candidates.values()]) + pscore_400 = max(c.content_score for c in candidates.values()) - self.assertEqual(pscore_100, pscore_50 + 1) - self.assertEqual(pscore_400, pscore_50 + 3) + self.assertAlmostEqual(pscore_50 + 0.5, pscore_100) + self.assertAlmostEqual(pscore_100 + 2.0, pscore_300) + self.assertAlmostEqual(pscore_300, pscore_400) class TestLinkDensityScoring(unittest.TestCase): @@ -258,24 +262,69 @@ class TestLinkDensityScoring(unittest.TestCase): def test_link_density(self): """Test that we get a link density""" - doc = document_fromstring(load_article('ars/ars.001.html')) - for node in doc.getiterator(): - if node.tag in ['p', 'td', 'pre']: - density = get_link_density(node) + doc = document_fromstring(load_article('ars.001.html')) + for node in doc.iter('p', 'td', 'pre'): + density = get_link_density(node) - # the density must be between 0, 1 - self.assertTrue(density >= 0.0 and density <= 1.0) + # the density must be between 0, 1 + self.assertTrue(density >= 0.0 and density <= 1.0) class TestSiblings(unittest.TestCase): """Siblings will be included if their content is related.""" + @unittest.skip("Not implemented yet.") def test_bad_siblings_not_counted(self): - """""" - - assert True, "TBD" + raise NotImplementedError() + @unittest.skip("Not implemented yet.") def test_good_siblings_counted(self): - """""" - - assert True, "TBD" + raise NotImplementedError() + + +class TestMainText(unittest.TestCase): + def test_empty(self): + article = Article("") + annotated_text = article.main_text + + self.assertEqual(annotated_text, []) + + def test_no_annotations(self): + article = Article("

This is text with no annotations

") + annotated_text = article.main_text + + self.assertEqual(annotated_text, + [(("This is text with no annotations", None),)]) + + def test_one_annotation(self): + article = Article("

This is text\r\twith no annotations

") + annotated_text = article.main_text + + expected = [( + ("This is text\nwith", None), + ("no", ("del",)), + ("annotations", None), + )] + self.assertEqual(annotated_text, expected) + + def test_simple_snippet(self): + snippet = Article(load_snippet("annotated_1.html")) + annotated_text = snippet.main_text + + expected = [ + ( + ("Paragraph is more", None), + ("better", ("em",)), + (".\nThis text is very", None), + ("pretty", ("strong",)), + ("'cause she's girl.", None), + ), + ( + ("This is not", None), + ("crap", ("big",)), + ("so", None), + ("readability", ("dfn",)), + ("me :)", None), + ) + ] + self.assertEqual(annotated_text, expected) diff --git a/src/breadability/tests/test_scoring.py b/tests/test_scoring.py similarity index 72% rename from src/breadability/tests/test_scoring.py rename to tests/test_scoring.py index f0b25e3..823987d 100644 --- a/src/breadability/tests/test_scoring.py +++ b/tests/test_scoring.py @@ -1,21 +1,50 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + import re + +from operator import attrgetter from lxml.html import document_fromstring from lxml.html import fragment_fromstring -from operator import attrgetter -try: - # Python < 2.7 - import unittest2 as unittest -except ImportError: - import unittest - -from breadability.readable import Article -from breadability.scoring import check_node_attr -from breadability.scoring import get_class_weight -from breadability.scoring import ScoredNode -from breadability.scoring import score_candidates -from breadability.readable import get_link_density -from breadability.readable import is_unlikely_node -from breadability.tests import load_snippet +from readability.readable import Article +from readability.scoring import check_node_attributes +from readability.scoring import get_class_weight +from readability.scoring import ScoredNode +from readability.scoring import score_candidates +from readability.scoring import generate_hash_id +from readability.readable import get_link_density +from readability.readable import is_unlikely_node +from .compat import unittest +from .utils import load_snippet + + +class TestHashId(unittest.TestCase): + def test_generate_hash(self): + dom = fragment_fromstring("
ľščťžýáí
") + generate_hash_id(dom) + + def test_hash_from_id_on_exception(self): + generate_hash_id(None) + + def test_different_hashes(self): + dom = fragment_fromstring("
ľščťžýáí
") + hash_dom = generate_hash_id(dom) + hash_none = generate_hash_id(None) + + self.assertNotEqual(hash_dom, hash_none) + + def test_equal_hashes(self): + dom1 = fragment_fromstring("
ľščťžýáí
") + dom2 = fragment_fromstring("
ľščťžýáí
") + hash_dom1 = generate_hash_id(dom1) + hash_dom2 = generate_hash_id(dom2) + self.assertEqual(hash_dom1, hash_dom2) + + hash_none1 = generate_hash_id(None) + hash_none2 = generate_hash_id(None) + self.assertEqual(hash_none1, hash_none2) class TestCheckNodeAttr(unittest.TestCase): @@ -27,33 +56,33 @@ class TestCheckNodeAttr(unittest.TestCase): """ def test_has_class(self): """Verify that a node has a class in our set.""" - test_re = re.compile('test1|test2', re.I) + test_pattern = re.compile('test1|test2', re.I) test_node = fragment_fromstring('
') test_node.set('class', 'test2 comment') - self.assertTrue(check_node_attr(test_node, 'class', test_re)) + self.assertTrue(check_node_attributes(test_pattern, test_node, 'class')) def test_has_id(self): """Verify that a node has an id in our set.""" - test_re = re.compile('test1|test2', re.I) + test_pattern = re.compile('test1|test2', re.I) test_node = fragment_fromstring('
') test_node.set('id', 'test2') - self.assertTrue(check_node_attr(test_node, 'id', test_re)) + self.assertTrue(check_node_attributes(test_pattern, test_node, 'id')) def test_lacks_class(self): """Verify that a node does not have a class in our set.""" - test_re = re.compile('test1|test2', re.I) + test_pattern = re.compile('test1|test2', re.I) test_node = fragment_fromstring('
') test_node.set('class', 'test4 comment') - self.assertFalse(check_node_attr(test_node, 'class', test_re)) + self.assertFalse(check_node_attributes(test_pattern, test_node, 'class')) def test_lacks_id(self): """Verify that a node does not have an id in our set.""" - test_re = re.compile('test1|test2', re.I) + test_pattern = re.compile('test1|test2', re.I) test_node = fragment_fromstring('
') test_node.set('id', 'test4') - self.assertFalse(check_node_attr(test_node, 'id', test_re)) + self.assertFalse(check_node_attributes(test_pattern, test_node, 'id')) class TestLinkDensity(unittest.TestCase): @@ -61,20 +90,17 @@ class TestLinkDensity(unittest.TestCase): def test_empty_node(self): """An empty node doesn't have much of a link density""" - empty_div = u"
" - doc = Article(empty_div) - assert 0 == get_link_density(doc._readable), "Link density is nadda" + doc = Article("
") + self.assertEqual(get_link_density(doc.readable_dom), 0.0) def test_small_doc_no_links(self): doc = Article(load_snippet('document_min.html')) - assert 0 == get_link_density(doc._readable), "Still no link density" + self.assertEqual(get_link_density(doc.readable_dom), 0.0) def test_several_links(self): """This doc has a 3 links with the majority of content.""" doc = Article(load_snippet('document_absolute_url.html')) - self.assertAlmostEqual( - get_link_density(doc._readable), 0.349, - places=3) + self.assertAlmostEqual(get_link_density(doc.readable_dom), 22/37) class TestClassWeight(unittest.TestCase): @@ -82,9 +108,7 @@ class TestClassWeight(unittest.TestCase): def test_no_matches_zero(self): """If you don't have the attribute then you get a weight of 0""" - empty_div = u"
" - node = fragment_fromstring(empty_div) - + node = fragment_fromstring("
") self.assertEqual(get_class_weight(node), 0) def test_id_hits(self): @@ -224,7 +248,7 @@ class TestScoreCandidates(unittest.TestCase): def test_simple_candidate_set(self): """Tests a simple case of two candidate nodes""" - doc = """ + html = """
@@ -238,18 +262,16 @@ class TestScoreCandidates(unittest.TestCase): """ - d_elem = document_fromstring(doc) - divs = d_elem.findall(".//div") - f_elem = divs[0] - s_elem = divs[1] - - res = score_candidates([f_elem, s_elem]) - ordered = sorted([c for c in res.values()], - key=attrgetter('content_score'), - reverse=True) - - # the body element should have a higher score - self.assertTrue(ordered[0].node.tag == 'body') - - # the html element is the outer should come in second - self.assertTrue(ordered[1].node.tag == 'html') + dom = document_fromstring(html) + div_nodes = dom.findall(".//div") + + candidates = score_candidates(div_nodes) + ordered = sorted((c for c in candidates.values()), reverse=True, + key=attrgetter("content_score")) + + self.assertEqual(ordered[0].node.tag, "div") + self.assertEqual(ordered[0].node.attrib["class"], "content") + self.assertEqual(ordered[1].node.tag, "body") + self.assertEqual(ordered[2].node.tag, "html") + self.assertEqual(ordered[3].node.tag, "div") + self.assertEqual(ordered[3].node.attrib["class"], "footer") diff --git a/tests/utils.py b/tests/utils.py new file mode 100644 index 0000000..5e1d2f8 --- /dev/null +++ b/tests/utils.py @@ -0,0 +1,23 @@ +# -*- coding: utf8 -*- + +from __future__ import absolute_import +from __future__ import division, print_function, unicode_literals + +from os.path import abspath, dirname, join + + +TEST_DIR = abspath(dirname(__file__)) + + +def load_snippet(file_name): + """Helper to fetch in the content of a test snippet.""" + file_path = join(TEST_DIR, "data/snippets", file_name) + with open(file_path, "rb") as file: + return file.read() + + +def load_article(file_name): + """Helper to fetch in the content of a test article.""" + file_path = join(TEST_DIR, "data/articles", file_name) + with open(file_path, "rb") as file: + return file.read()