mirror of
https://github.com/searxng/searxng
synced 2024-10-30 21:20:28 +00:00
542f7d0d7b
In the past, some files were tested with the standard profile, others with a profile in which most of the messages were switched off ... some files were not checked at all. - ``PYLINT_SEARXNG_DISABLE_OPTION`` has been abolished - the distinction ``# lint: pylint`` is no longer necessary - the pylint tasks have been reduced from three to two 1. ./searx/engines -> lint engines with additional builtins 2. ./searx ./searxng_extra ./tests -> lint all other python files Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
451 lines
16 KiB
Python
451 lines
16 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
# pylint: disable=missing-module-docstring
|
|
|
|
import re
|
|
from collections import defaultdict
|
|
from operator import itemgetter
|
|
from threading import RLock
|
|
from typing import List, NamedTuple, Set
|
|
from urllib.parse import urlparse, unquote
|
|
|
|
from searx import logger
|
|
from searx import utils
|
|
from searx.engines import engines
|
|
from searx.metrics import histogram_observe, counter_add, count_error
|
|
|
|
|
|
CONTENT_LEN_IGNORED_CHARS_REGEX = re.compile(r'[,;:!?\./\\\\ ()-_]', re.M | re.U)
|
|
WHITESPACE_REGEX = re.compile('( |\t|\n)+', re.M | re.U)
|
|
|
|
|
|
# return the meaningful length of the content for a result
|
|
def result_content_len(content):
|
|
if isinstance(content, str):
|
|
return len(CONTENT_LEN_IGNORED_CHARS_REGEX.sub('', content))
|
|
return 0
|
|
|
|
|
|
def compare_urls(url_a, url_b):
|
|
"""Lazy compare between two URL.
|
|
"www.example.com" and "example.com" are equals.
|
|
"www.example.com/path/" and "www.example.com/path" are equals.
|
|
"https://www.example.com/" and "http://www.example.com/" are equals.
|
|
|
|
Args:
|
|
url_a (ParseResult): first URL
|
|
url_b (ParseResult): second URL
|
|
|
|
Returns:
|
|
bool: True if url_a and url_b are equals
|
|
"""
|
|
# ignore www. in comparison
|
|
if url_a.netloc.startswith('www.'):
|
|
host_a = url_a.netloc.replace('www.', '', 1)
|
|
else:
|
|
host_a = url_a.netloc
|
|
if url_b.netloc.startswith('www.'):
|
|
host_b = url_b.netloc.replace('www.', '', 1)
|
|
else:
|
|
host_b = url_b.netloc
|
|
|
|
if host_a != host_b or url_a.query != url_b.query or url_a.fragment != url_b.fragment:
|
|
return False
|
|
|
|
# remove / from the end of the url if required
|
|
path_a = url_a.path[:-1] if url_a.path.endswith('/') else url_a.path
|
|
path_b = url_b.path[:-1] if url_b.path.endswith('/') else url_b.path
|
|
|
|
return unquote(path_a) == unquote(path_b)
|
|
|
|
|
|
def merge_two_infoboxes(infobox1, infobox2): # pylint: disable=too-many-branches, too-many-statements
|
|
# get engines weights
|
|
if hasattr(engines[infobox1['engine']], 'weight'):
|
|
weight1 = engines[infobox1['engine']].weight
|
|
else:
|
|
weight1 = 1
|
|
if hasattr(engines[infobox2['engine']], 'weight'):
|
|
weight2 = engines[infobox2['engine']].weight
|
|
else:
|
|
weight2 = 1
|
|
|
|
if weight2 > weight1:
|
|
infobox1['engine'] = infobox2['engine']
|
|
|
|
infobox1['engines'] |= infobox2['engines']
|
|
|
|
if 'urls' in infobox2:
|
|
urls1 = infobox1.get('urls', None)
|
|
if urls1 is None:
|
|
urls1 = []
|
|
|
|
for url2 in infobox2.get('urls', []):
|
|
unique_url = True
|
|
parsed_url2 = urlparse(url2.get('url', ''))
|
|
entity_url2 = url2.get('entity')
|
|
for url1 in urls1:
|
|
if (entity_url2 is not None and url1.get('entity') == entity_url2) or compare_urls(
|
|
urlparse(url1.get('url', '')), parsed_url2
|
|
):
|
|
unique_url = False
|
|
break
|
|
if unique_url:
|
|
urls1.append(url2)
|
|
|
|
infobox1['urls'] = urls1
|
|
|
|
if 'img_src' in infobox2:
|
|
img1 = infobox1.get('img_src', None)
|
|
img2 = infobox2.get('img_src')
|
|
if img1 is None:
|
|
infobox1['img_src'] = img2
|
|
elif weight2 > weight1:
|
|
infobox1['img_src'] = img2
|
|
|
|
if 'attributes' in infobox2:
|
|
attributes1 = infobox1.get('attributes')
|
|
if attributes1 is None:
|
|
infobox1['attributes'] = attributes1 = []
|
|
|
|
attributeSet = set()
|
|
for attribute in attributes1:
|
|
label = attribute.get('label')
|
|
if label not in attributeSet:
|
|
attributeSet.add(label)
|
|
entity = attribute.get('entity')
|
|
if entity not in attributeSet:
|
|
attributeSet.add(entity)
|
|
|
|
for attribute in infobox2.get('attributes', []):
|
|
if attribute.get('label') not in attributeSet and attribute.get('entity') not in attributeSet:
|
|
attributes1.append(attribute)
|
|
|
|
if 'content' in infobox2:
|
|
content1 = infobox1.get('content', None)
|
|
content2 = infobox2.get('content', '')
|
|
if content1 is not None:
|
|
if result_content_len(content2) > result_content_len(content1):
|
|
infobox1['content'] = content2
|
|
else:
|
|
infobox1['content'] = content2
|
|
|
|
|
|
def result_score(result):
|
|
weight = 1.0
|
|
|
|
for result_engine in result['engines']:
|
|
if hasattr(engines[result_engine], 'weight'):
|
|
weight *= float(engines[result_engine].weight)
|
|
|
|
occurrences = len(result['positions'])
|
|
|
|
return sum((occurrences * weight) / position for position in result['positions'])
|
|
|
|
|
|
class Timing(NamedTuple): # pylint: disable=missing-class-docstring
|
|
engine: str
|
|
total: float
|
|
load: float
|
|
|
|
|
|
class UnresponsiveEngine(NamedTuple): # pylint: disable=missing-class-docstring
|
|
engine: str
|
|
error_type: str
|
|
suspended: bool
|
|
|
|
|
|
class ResultContainer:
|
|
"""docstring for ResultContainer"""
|
|
|
|
__slots__ = (
|
|
'_merged_results',
|
|
'infoboxes',
|
|
'suggestions',
|
|
'answers',
|
|
'corrections',
|
|
'_number_of_results',
|
|
'_closed',
|
|
'paging',
|
|
'unresponsive_engines',
|
|
'timings',
|
|
'redirect_url',
|
|
'engine_data',
|
|
'on_result',
|
|
'_lock',
|
|
)
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
self._merged_results = []
|
|
self.infoboxes = []
|
|
self.suggestions = set()
|
|
self.answers = {}
|
|
self.corrections = set()
|
|
self._number_of_results = []
|
|
self.engine_data = defaultdict(dict)
|
|
self._closed = False
|
|
self.paging = False
|
|
self.unresponsive_engines: Set[UnresponsiveEngine] = set()
|
|
self.timings: List[Timing] = []
|
|
self.redirect_url = None
|
|
self.on_result = lambda _: True
|
|
self._lock = RLock()
|
|
|
|
def extend(self, engine_name, results): # pylint: disable=too-many-branches
|
|
if self._closed:
|
|
return
|
|
|
|
standard_result_count = 0
|
|
error_msgs = set()
|
|
for result in list(results):
|
|
result['engine'] = engine_name
|
|
if 'suggestion' in result and self.on_result(result):
|
|
self.suggestions.add(result['suggestion'])
|
|
elif 'answer' in result and self.on_result(result):
|
|
self.answers[result['answer']] = result
|
|
elif 'correction' in result and self.on_result(result):
|
|
self.corrections.add(result['correction'])
|
|
elif 'infobox' in result and self.on_result(result):
|
|
self._merge_infobox(result)
|
|
elif 'number_of_results' in result and self.on_result(result):
|
|
self._number_of_results.append(result['number_of_results'])
|
|
elif 'engine_data' in result and self.on_result(result):
|
|
self.engine_data[engine_name][result['key']] = result['engine_data']
|
|
elif 'url' in result:
|
|
# standard result (url, title, content)
|
|
if not self._is_valid_url_result(result, error_msgs):
|
|
continue
|
|
# normalize the result
|
|
self._normalize_url_result(result)
|
|
# call on_result call searx.search.SearchWithPlugins._on_result
|
|
# which calls the plugins
|
|
if not self.on_result(result):
|
|
continue
|
|
self.__merge_url_result(result, standard_result_count + 1)
|
|
standard_result_count += 1
|
|
elif self.on_result(result):
|
|
self.__merge_result_no_url(result, standard_result_count + 1)
|
|
standard_result_count += 1
|
|
|
|
if len(error_msgs) > 0:
|
|
for msg in error_msgs:
|
|
count_error(engine_name, 'some results are invalids: ' + msg, secondary=True)
|
|
|
|
if engine_name in engines:
|
|
histogram_observe(standard_result_count, 'engine', engine_name, 'result', 'count')
|
|
|
|
if not self.paging and engine_name in engines and engines[engine_name].paging:
|
|
self.paging = True
|
|
|
|
def _merge_infobox(self, infobox):
|
|
add_infobox = True
|
|
infobox_id = infobox.get('id', None)
|
|
infobox['engines'] = set([infobox['engine']])
|
|
if infobox_id is not None:
|
|
parsed_url_infobox_id = urlparse(infobox_id)
|
|
with self._lock:
|
|
for existingIndex in self.infoboxes:
|
|
if compare_urls(urlparse(existingIndex.get('id', '')), parsed_url_infobox_id):
|
|
merge_two_infoboxes(existingIndex, infobox)
|
|
add_infobox = False
|
|
|
|
if add_infobox:
|
|
self.infoboxes.append(infobox)
|
|
|
|
def _is_valid_url_result(self, result, error_msgs):
|
|
if 'url' in result:
|
|
if not isinstance(result['url'], str):
|
|
logger.debug('result: invalid URL: %s', str(result))
|
|
error_msgs.add('invalid URL')
|
|
return False
|
|
|
|
if 'title' in result and not isinstance(result['title'], str):
|
|
logger.debug('result: invalid title: %s', str(result))
|
|
error_msgs.add('invalid title')
|
|
return False
|
|
|
|
if 'content' in result:
|
|
if not isinstance(result['content'], str):
|
|
logger.debug('result: invalid content: %s', str(result))
|
|
error_msgs.add('invalid content')
|
|
return False
|
|
|
|
return True
|
|
|
|
def _normalize_url_result(self, result):
|
|
"""Return True if the result is valid"""
|
|
result['parsed_url'] = urlparse(result['url'])
|
|
|
|
# if the result has no scheme, use http as default
|
|
if not result['parsed_url'].scheme:
|
|
result['parsed_url'] = result['parsed_url']._replace(scheme="http")
|
|
result['url'] = result['parsed_url'].geturl()
|
|
|
|
# avoid duplicate content between the content and title fields
|
|
if result.get('content') == result.get('title'):
|
|
del result['content']
|
|
|
|
# make sure there is a template
|
|
if 'template' not in result:
|
|
result['template'] = 'default.html'
|
|
|
|
# strip multiple spaces and carriage returns from content
|
|
if result.get('content'):
|
|
result['content'] = WHITESPACE_REGEX.sub(' ', result['content'])
|
|
|
|
def __merge_url_result(self, result, position):
|
|
result['engines'] = set([result['engine']])
|
|
with self._lock:
|
|
duplicated = self.__find_duplicated_http_result(result)
|
|
if duplicated:
|
|
self.__merge_duplicated_http_result(duplicated, result, position)
|
|
return
|
|
|
|
# if there is no duplicate found, append result
|
|
result['positions'] = [position]
|
|
self._merged_results.append(result)
|
|
|
|
def __find_duplicated_http_result(self, result):
|
|
result_template = result.get('template')
|
|
for merged_result in self._merged_results:
|
|
if 'parsed_url' not in merged_result:
|
|
continue
|
|
if compare_urls(result['parsed_url'], merged_result['parsed_url']) and result_template == merged_result.get(
|
|
'template'
|
|
):
|
|
if result_template != 'images.html':
|
|
# not an image, same template, same url : it's a duplicate
|
|
return merged_result
|
|
|
|
# it's an image
|
|
# it's a duplicate if the parsed_url, template and img_src are different
|
|
if result.get('img_src', '') == merged_result.get('img_src', ''):
|
|
return merged_result
|
|
return None
|
|
|
|
def __merge_duplicated_http_result(self, duplicated, result, position):
|
|
# using content with more text
|
|
if result_content_len(result.get('content', '')) > result_content_len(duplicated.get('content', '')):
|
|
duplicated['content'] = result['content']
|
|
|
|
# merge all result's parameters not found in duplicate
|
|
for key in result.keys():
|
|
if not duplicated.get(key):
|
|
duplicated[key] = result.get(key)
|
|
|
|
# add the new position
|
|
duplicated['positions'].append(position)
|
|
|
|
# add engine to list of result-engines
|
|
duplicated['engines'].add(result['engine'])
|
|
|
|
# using https if possible
|
|
if duplicated['parsed_url'].scheme != 'https' and result['parsed_url'].scheme == 'https':
|
|
duplicated['url'] = result['parsed_url'].geturl()
|
|
duplicated['parsed_url'] = result['parsed_url']
|
|
|
|
def __merge_result_no_url(self, result, position):
|
|
result['engines'] = set([result['engine']])
|
|
result['positions'] = [position]
|
|
with self._lock:
|
|
self._merged_results.append(result)
|
|
|
|
def close(self):
|
|
self._closed = True
|
|
|
|
for result in self._merged_results:
|
|
score = result_score(result)
|
|
result['score'] = score
|
|
|
|
# removing html content and whitespace duplications
|
|
if result.get('content'):
|
|
result['content'] = utils.html_to_text(result['content']).strip()
|
|
if result.get('title'):
|
|
result['title'] = ' '.join(utils.html_to_text(result['title']).strip().split())
|
|
|
|
for result_engine in result['engines']:
|
|
counter_add(score, 'engine', result_engine, 'score')
|
|
|
|
results = sorted(self._merged_results, key=itemgetter('score'), reverse=True)
|
|
|
|
# pass 2 : group results by category and template
|
|
gresults = []
|
|
categoryPositions = {}
|
|
|
|
for res in results:
|
|
# do we need to handle more than one category per engine?
|
|
engine = engines[res['engine']]
|
|
res['category'] = engine.categories[0] if len(engine.categories) > 0 else ''
|
|
|
|
# do we need to handle more than one category per engine?
|
|
category = (
|
|
res['category']
|
|
+ ':'
|
|
+ res.get('template', '')
|
|
+ ':'
|
|
+ ('img_src' if 'img_src' in res or 'thumbnail' in res else '')
|
|
)
|
|
|
|
current = None if category not in categoryPositions else categoryPositions[category]
|
|
|
|
# group with previous results using the same category
|
|
# if the group can accept more result and is not too far
|
|
# from the current position
|
|
if current is not None and (current['count'] > 0) and (len(gresults) - current['index'] < 20):
|
|
# group with the previous results using
|
|
# the same category with this one
|
|
index = current['index']
|
|
gresults.insert(index, res)
|
|
|
|
# update every index after the current one
|
|
# (including the current one)
|
|
for k in categoryPositions: # pylint: disable=consider-using-dict-items
|
|
v = categoryPositions[k]['index']
|
|
if v >= index:
|
|
categoryPositions[k]['index'] = v + 1
|
|
|
|
# update this category
|
|
current['count'] -= 1
|
|
|
|
else:
|
|
# same category
|
|
gresults.append(res)
|
|
|
|
# update categoryIndex
|
|
categoryPositions[category] = {'index': len(gresults), 'count': 8}
|
|
|
|
# update _merged_results
|
|
self._merged_results = gresults
|
|
|
|
def get_ordered_results(self):
|
|
if not self._closed:
|
|
self.close()
|
|
return self._merged_results
|
|
|
|
def results_length(self):
|
|
return len(self._merged_results)
|
|
|
|
@property
|
|
def number_of_results(self) -> int:
|
|
"""Returns the average of results number, returns zero if the average
|
|
result number is smaller than the actual result count."""
|
|
|
|
resultnum_sum = sum(self._number_of_results)
|
|
if not resultnum_sum or not self._number_of_results:
|
|
return 0
|
|
|
|
average = int(resultnum_sum / len(self._number_of_results))
|
|
if average < self.results_length():
|
|
average = 0
|
|
return average
|
|
|
|
def add_unresponsive_engine(self, engine_name: str, error_type: str, suspended: bool = False):
|
|
if engines[engine_name].display_error_messages:
|
|
self.unresponsive_engines.add(UnresponsiveEngine(engine_name, error_type, suspended))
|
|
|
|
def add_timing(self, engine_name: str, engine_time: float, page_load_time: float):
|
|
self.timings.append(Timing(engine_name, total=engine_time, load=page_load_time))
|
|
|
|
def get_timings(self):
|
|
return self.timings
|