mirror of
https://github.com/searxng/searxng
synced 2024-10-30 21:20:28 +00:00
e4cf0a7d4f
Highlights all search queries in search result in one go. Fixes the case where search query contains word from highlight HTML code, which causes broken HTML to appear in search results. Closes #3057
361 lines
12 KiB
Python
361 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import annotations
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import os
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import pathlib
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import csv
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import hashlib
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import hmac
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import re
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import inspect
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import itertools
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import json
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from datetime import datetime, timedelta
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from typing import Iterable, List, Tuple, Dict, TYPE_CHECKING
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from io import StringIO
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from codecs import getincrementalencoder
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from flask_babel import gettext, format_date # type: ignore
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from searx import logger, settings
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from searx.engines import DEFAULT_CATEGORY
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if TYPE_CHECKING:
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from searx.enginelib import Engine
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from searx.results import ResultContainer
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from searx.search import SearchQuery
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from searx.results import UnresponsiveEngine
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VALID_LANGUAGE_CODE = re.compile(r'^[a-z]{2,3}(-[a-zA-Z]{2})?$')
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logger = logger.getChild('webutils')
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timeout_text = gettext('timeout')
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parsing_error_text = gettext('parsing error')
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http_protocol_error_text = gettext('HTTP protocol error')
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network_error_text = gettext('network error')
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ssl_cert_error_text = gettext("SSL error: certificate validation has failed")
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exception_classname_to_text = {
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None: gettext('unexpected crash'),
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'timeout': timeout_text,
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'asyncio.TimeoutError': timeout_text,
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'httpx.TimeoutException': timeout_text,
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'httpx.ConnectTimeout': timeout_text,
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'httpx.ReadTimeout': timeout_text,
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'httpx.WriteTimeout': timeout_text,
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'httpx.HTTPStatusError': gettext('HTTP error'),
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'httpx.ConnectError': gettext("HTTP connection error"),
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'httpx.RemoteProtocolError': http_protocol_error_text,
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'httpx.LocalProtocolError': http_protocol_error_text,
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'httpx.ProtocolError': http_protocol_error_text,
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'httpx.ReadError': network_error_text,
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'httpx.WriteError': network_error_text,
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'httpx.ProxyError': gettext("proxy error"),
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'searx.exceptions.SearxEngineCaptchaException': gettext("CAPTCHA"),
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'searx.exceptions.SearxEngineTooManyRequestsException': gettext("too many requests"),
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'searx.exceptions.SearxEngineAccessDeniedException': gettext("access denied"),
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'searx.exceptions.SearxEngineAPIException': gettext("server API error"),
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'searx.exceptions.SearxEngineXPathException': parsing_error_text,
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'KeyError': parsing_error_text,
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'json.decoder.JSONDecodeError': parsing_error_text,
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'lxml.etree.ParserError': parsing_error_text,
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'ssl.SSLCertVerificationError': ssl_cert_error_text, # for Python > 3.7
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'ssl.CertificateError': ssl_cert_error_text, # for Python 3.7
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}
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def get_translated_errors(unresponsive_engines: Iterable[UnresponsiveEngine]):
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translated_errors = []
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for unresponsive_engine in unresponsive_engines:
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error_user_text = exception_classname_to_text.get(unresponsive_engine.error_type)
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if not error_user_text:
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error_user_text = exception_classname_to_text[None]
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error_msg = gettext(error_user_text)
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if unresponsive_engine.suspended:
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error_msg = gettext('Suspended') + ': ' + error_msg
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translated_errors.append((unresponsive_engine.engine, error_msg))
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return sorted(translated_errors, key=lambda e: e[0])
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class CSVWriter:
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"""A CSV writer which will write rows to CSV file "f", which is encoded in
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the given encoding."""
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def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
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# Redirect output to a queue
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self.queue = StringIO()
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self.writer = csv.writer(self.queue, dialect=dialect, **kwds)
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self.stream = f
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self.encoder = getincrementalencoder(encoding)()
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def writerow(self, row):
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self.writer.writerow(row)
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# Fetch UTF-8 output from the queue ...
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data = self.queue.getvalue()
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data = data.strip('\x00')
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# ... and re-encode it into the target encoding
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data = self.encoder.encode(data)
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# write to the target stream
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self.stream.write(data.decode())
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# empty queue
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self.queue.truncate(0)
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def writerows(self, rows):
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for row in rows:
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self.writerow(row)
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def write_csv_response(csv: CSVWriter, rc: ResultContainer) -> None:
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"""Write rows of the results to a query (``application/csv``) into a CSV
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table (:py:obj:`CSVWriter`). First line in the table contain the column
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names. The column "type" specifies the type, the following types are
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included in the table:
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- result
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- answer
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- suggestion
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- correction
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"""
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results = rc.get_ordered_results()
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keys = ('title', 'url', 'content', 'host', 'engine', 'score', 'type')
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csv.writerow(keys)
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for row in results:
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row['host'] = row['parsed_url'].netloc
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row['type'] = 'result'
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csv.writerow([row.get(key, '') for key in keys])
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for a in rc.answers:
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row = {'title': a, 'type': 'answer'}
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csv.writerow([row.get(key, '') for key in keys])
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for a in rc.suggestions:
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row = {'title': a, 'type': 'suggestion'}
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csv.writerow([row.get(key, '') for key in keys])
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for a in rc.corrections:
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row = {'title': a, 'type': 'correction'}
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csv.writerow([row.get(key, '') for key in keys])
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class JSONEncoder(json.JSONEncoder):
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def default(self, o):
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if isinstance(o, datetime):
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return o.isoformat()
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if isinstance(o, timedelta):
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return o.total_seconds()
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if isinstance(o, set):
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return list(o)
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return super().default(o)
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def get_json_response(sq: SearchQuery, rc: ResultContainer) -> str:
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"""Returns the JSON string of the results to a query (``application/json``)"""
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results = rc.number_of_results
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x = {
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'query': sq.query,
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'number_of_results': results,
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'results': rc.get_ordered_results(),
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'answers': list(rc.answers),
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'corrections': list(rc.corrections),
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'infoboxes': rc.infoboxes,
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'suggestions': list(rc.suggestions),
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'unresponsive_engines': get_translated_errors(rc.unresponsive_engines),
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}
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response = json.dumps(x, cls=JSONEncoder)
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return response
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def get_themes(templates_path):
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"""Returns available themes list."""
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return os.listdir(templates_path)
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def get_hash_for_file(file: pathlib.Path) -> str:
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m = hashlib.sha1()
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with file.open('rb') as f:
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m.update(f.read())
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return m.hexdigest()
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def get_static_files(static_path: str) -> Dict[str, str]:
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static_files: Dict[str, str] = {}
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static_path_path = pathlib.Path(static_path)
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def walk(path: pathlib.Path):
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for file in path.iterdir():
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if file.name.startswith('.'):
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# ignore hidden file
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continue
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if file.is_file():
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static_files[str(file.relative_to(static_path_path))] = get_hash_for_file(file)
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if file.is_dir() and file.name not in ('node_modules', 'src'):
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# ignore "src" and "node_modules" directories
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walk(file)
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walk(static_path_path)
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return static_files
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def get_result_templates(templates_path):
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result_templates = set()
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templates_path_length = len(templates_path) + 1
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for directory, _, files in os.walk(templates_path):
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if directory.endswith('result_templates'):
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for filename in files:
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f = os.path.join(directory[templates_path_length:], filename)
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result_templates.add(f)
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return result_templates
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def new_hmac(secret_key, url):
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return hmac.new(secret_key.encode(), url, hashlib.sha256).hexdigest()
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def is_hmac_of(secret_key, value, hmac_to_check):
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hmac_of_value = new_hmac(secret_key, value)
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return len(hmac_of_value) == len(hmac_to_check) and hmac.compare_digest(hmac_of_value, hmac_to_check)
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def prettify_url(url, max_length=74):
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if len(url) > max_length:
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chunk_len = int(max_length / 2 + 1)
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return '{0}[...]{1}'.format(url[:chunk_len], url[-chunk_len:])
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else:
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return url
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def contains_cjko(s: str) -> bool:
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"""This function check whether or not a string contains Chinese, Japanese,
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or Korean characters. It employs regex and uses the u escape sequence to
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match any character in a set of Unicode ranges.
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Args:
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s (str): string to be checked.
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Returns:
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bool: True if the input s contains the characters and False otherwise.
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"""
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unicode_ranges = (
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'\u4e00-\u9fff' # Chinese characters
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'\u3040-\u309f' # Japanese hiragana
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'\u30a0-\u30ff' # Japanese katakana
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'\u4e00-\u9faf' # Japanese kanji
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'\uac00-\ud7af' # Korean hangul syllables
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'\u1100-\u11ff' # Korean hangul jamo
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)
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return bool(re.search(fr'[{unicode_ranges}]', s))
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def regex_highlight_cjk(word: str) -> str:
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"""Generate the regex pattern to match for a given word according
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to whether or not the word contains CJK characters or not.
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If the word is and/or contains CJK character, the regex pattern
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will match standalone word by taking into account the presence
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of whitespace before and after it; if not, it will match any presence
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of the word throughout the text, ignoring the whitespace.
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Args:
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word (str): the word to be matched with regex pattern.
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Returns:
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str: the regex pattern for the word.
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"""
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rword = re.escape(word)
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if contains_cjko(rword):
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return fr'({rword})'
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else:
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return fr'\b({rword})(?!\w)'
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def highlight_content(content, query):
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if not content:
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return None
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# ignoring html contents
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# TODO better html content detection
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if content.find('<') != -1:
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return content
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querysplit = query.split()
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queries = []
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for qs in querysplit:
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qs = qs.replace("'", "").replace('"', '').replace(" ", "")
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if len(qs) > 0:
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queries.extend(re.findall(regex_highlight_cjk(qs), content, flags=re.I | re.U))
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if len(queries) > 0:
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regex = re.compile("|".join(map(regex_highlight_cjk, queries)))
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return regex.sub(lambda match: f'<span class="highlight">{match.group(0)}</span>'.replace('\\', r'\\'), content)
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return content
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def searxng_l10n_timespan(dt: datetime) -> str: # pylint: disable=invalid-name
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"""Returns a human-readable and translated string indicating how long ago
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a date was in the past / the time span of the date to the present.
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On January 1st, midnight, the returned string only indicates how many years
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ago the date was.
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"""
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# TODO, check if timezone is calculated right # pylint: disable=fixme
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d = dt.date()
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t = dt.time()
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if d.month == 1 and d.day == 1 and t.hour == 0 and t.minute == 0 and t.second == 0:
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return str(d.year)
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if dt.replace(tzinfo=None) >= datetime.now() - timedelta(days=1):
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timedifference = datetime.now() - dt.replace(tzinfo=None)
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minutes = int((timedifference.seconds / 60) % 60)
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hours = int(timedifference.seconds / 60 / 60)
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if hours == 0:
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return gettext('{minutes} minute(s) ago').format(minutes=minutes)
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return gettext('{hours} hour(s), {minutes} minute(s) ago').format(hours=hours, minutes=minutes)
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return format_date(dt)
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def is_flask_run_cmdline():
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"""Check if the application was started using "flask run" command line
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Inspect the callstack.
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See https://github.com/pallets/flask/blob/master/src/flask/__main__.py
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Returns:
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bool: True if the application was started using "flask run".
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"""
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frames = inspect.stack()
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if len(frames) < 2:
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return False
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return frames[-2].filename.endswith('flask/cli.py')
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NO_SUBGROUPING = 'without further subgrouping'
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def group_engines_in_tab(engines: Iterable[Engine]) -> List[Tuple[str, Iterable[Engine]]]:
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"""Groups an Iterable of engines by their first non tab category (first subgroup)"""
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def get_subgroup(eng):
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non_tab_categories = [c for c in eng.categories if c not in tabs + [DEFAULT_CATEGORY]]
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return non_tab_categories[0] if len(non_tab_categories) > 0 else NO_SUBGROUPING
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def group_sort_key(group):
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return (group[0] == NO_SUBGROUPING, group[0].lower())
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def engine_sort_key(engine):
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return (engine.about.get('language', ''), engine.name)
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tabs = list(settings['categories_as_tabs'].keys())
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subgroups = itertools.groupby(sorted(engines, key=get_subgroup), get_subgroup)
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sorted_groups = sorted(((name, list(engines)) for name, engines in subgroups), key=group_sort_key)
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ret_val = []
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for groupname, engines in sorted_groups:
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group_bang = '!' + groupname.replace(' ', '_') if groupname != NO_SUBGROUPING else ''
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ret_val.append((groupname, group_bang, sorted(engines, key=engine_sort_key)))
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return ret_val
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