mirror of https://github.com/searx/searx
399 lines
15 KiB
Python
399 lines
15 KiB
Python
import re
|
|
from collections import defaultdict
|
|
from operator import itemgetter
|
|
from threading import RLock
|
|
from urllib.parse import urlparse, unquote
|
|
from searx import logger
|
|
from searx.engines import engines
|
|
from searx.metrology.error_recorder import record_error
|
|
from searx.utils import add_scheme_to_url
|
|
from searx import settings
|
|
|
|
|
|
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))
|
|
else:
|
|
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):
|
|
# 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, language):
|
|
weight = 1.0
|
|
|
|
for result_engine in result['engines']:
|
|
if hasattr(engines[result_engine], 'weight'):
|
|
weight *= float(engines[result_engine].weight)
|
|
|
|
if settings['search'].get('prefer_configured_language', False):
|
|
domain_parts = result['parsed_url'].netloc.split('.')
|
|
if language in domain_parts:
|
|
weight *= 1.1
|
|
|
|
occurrences = len(result['positions'])
|
|
|
|
return sum((occurrences * weight) / position for position in result['positions'])
|
|
|
|
|
|
class ResultContainer:
|
|
"""docstring for ResultContainer"""
|
|
|
|
__slots__ = '_merged_results', 'infoboxes', 'suggestions', 'answers', 'corrections', '_number_of_results',\
|
|
'_ordered', 'paging', 'unresponsive_engines', 'timings', 'redirect_url', 'engine_data',\
|
|
'_language'
|
|
|
|
def __init__(self, language):
|
|
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._ordered = False
|
|
self.paging = False
|
|
self.unresponsive_engines = set()
|
|
self.timings = []
|
|
self.redirect_url = None
|
|
self._language = language.lower().split('-')[0]
|
|
|
|
def extend(self, engine_name, results):
|
|
standard_result_count = 0
|
|
error_msgs = set()
|
|
for result in list(results):
|
|
result['engine'] = engine_name
|
|
if 'suggestion' in result:
|
|
self.suggestions.add(result['suggestion'])
|
|
elif 'answer' in result:
|
|
self.answers[result['answer']] = result
|
|
elif 'correction' in result:
|
|
self.corrections.add(result['correction'])
|
|
elif 'infobox' in result:
|
|
self._merge_infobox(result)
|
|
elif 'number_of_results' in result:
|
|
self._number_of_results.append(result['number_of_results'])
|
|
elif 'engine_data' in result:
|
|
self.engine_data[engine_name][result['key']] = result['engine_data']
|
|
else:
|
|
# standard result (url, title, content)
|
|
if 'url' in result and not isinstance(result['url'], str):
|
|
logger.debug('result: invalid URL: %s', str(result))
|
|
error_msgs.add('invalid URL')
|
|
elif 'title' in result and not isinstance(result['title'], str):
|
|
logger.debug('result: invalid title: %s', str(result))
|
|
error_msgs.add('invalid title')
|
|
elif 'content' in result and not isinstance(result['content'], str):
|
|
logger.debug('result: invalid content: %s', str(result))
|
|
error_msgs.add('invalid content')
|
|
else:
|
|
self._merge_result(result, standard_result_count + 1)
|
|
standard_result_count += 1
|
|
|
|
if len(error_msgs) > 0:
|
|
for msg in error_msgs:
|
|
record_error(engine_name, 'some results are invalids: ' + msg)
|
|
|
|
if engine_name in engines:
|
|
with RLock():
|
|
engines[engine_name].stats['search_count'] += 1
|
|
engines[engine_name].stats['result_count'] += standard_result_count
|
|
|
|
if not self.paging and standard_result_count > 0 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)
|
|
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 _merge_result(self, result, position):
|
|
if 'url' in result:
|
|
self.__merge_url_result(result, position)
|
|
return
|
|
|
|
self.__merge_result_no_url(result, position)
|
|
|
|
def __merge_url_result(self, result, position):
|
|
result['parsed_url'] = urlparse(result['url'])
|
|
|
|
# if the result has no scheme, use http as default
|
|
if not result['parsed_url'].scheme or result['parsed_url'].scheme == '':
|
|
result['parsed_url'] = result['parsed_url']._replace(scheme='http')
|
|
result['url'] = result['parsed_url'].geturl()
|
|
|
|
if 'thumbnail_src' in result:
|
|
result['thumbnail_src'] = add_scheme_to_url(result['thumbnail_src'])
|
|
if 'img_src' in result:
|
|
result['img_src'] = add_scheme_to_url(result['img_src'])
|
|
|
|
result['engines'] = set([result['engine']])
|
|
|
|
# strip multiple spaces and carriage returns from content
|
|
if result.get('content'):
|
|
result['content'] = WHITESPACE_REGEX.sub(' ', result['content'])
|
|
|
|
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]
|
|
with RLock():
|
|
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
|
|
else:
|
|
# 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 RLock():
|
|
self._merged_results.append(result)
|
|
|
|
def order_results(self):
|
|
for result in self._merged_results:
|
|
score = result_score(result, self._language)
|
|
result['score'] = score
|
|
with RLock():
|
|
for result_engine in result['engines']:
|
|
engines[result_engine].stats['score_count'] += 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:
|
|
# FIXME : handle more than one category per engine
|
|
engine = engines[res['engine']]
|
|
res['category'] = engine.categories[0] if len(engine.categories) > 0 else ''
|
|
|
|
# FIXME : 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:
|
|
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._ordered = True
|
|
self._merged_results = gresults
|
|
|
|
def get_ordered_results(self):
|
|
if not self._ordered:
|
|
self.order_results()
|
|
return self._merged_results
|
|
|
|
def results_length(self):
|
|
return len(self._merged_results)
|
|
|
|
def results_number(self):
|
|
resultnum_sum = sum(self._number_of_results)
|
|
if not resultnum_sum or not self._number_of_results:
|
|
return 0
|
|
return resultnum_sum / len(self._number_of_results)
|
|
|
|
def add_unresponsive_engine(self, engine_name, error_type, error_message=None):
|
|
if engines[engine_name].display_error_messages:
|
|
self.unresponsive_engines.add((engine_name, error_type, error_message))
|
|
|
|
def add_timing(self, engine_name, engine_time, page_load_time):
|
|
self.timings.append({
|
|
'engine': engines[engine_name].shortcut,
|
|
'total': engine_time,
|
|
'load': page_load_time
|
|
})
|
|
|
|
def get_timings(self):
|
|
return self.timings
|