mirror of
https://github.com/searxng/searxng.git
synced 2024-11-04 20:30:11 +01:00
[enh][mod] result handling refactor
Several changes has been made: - Parallel result merge - Scoring algorithm slightly changed (see result_score()) - Proper Thread locking on global data manipulation
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239
searx/results.py
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239
searx/results.py
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@ -0,0 +1,239 @@
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import re
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from collections import defaultdict
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from operator import itemgetter
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from threading import RLock
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from urlparse import urlparse, unquote
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from searx.engines import engines
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CONTENT_LEN_IGNORED_CHARS_REGEX = re.compile('[,;:!?\./\\\\ ()-_]', re.M | re.U)
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WHITESPACE_REGEX = re.compile('( |\t|\n)+', re.M | re.U)
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# return the meaningful length of the content for a result
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def result_content_len(content):
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if isinstance(content, basestring):
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return len(CONTENT_LEN_IGNORED_CHARS_REGEX.sub('', content))
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else:
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return 0
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def compare_urls(url_a, url_b):
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if url_a.netloc != url_b.netloc or url_a.query != url_b.query:
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return False
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# remove / from the end of the url if required
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path_a = url_a.path[:-1]\
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if url_a.path.endswith('/')\
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else url_a.path
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path_b = url_b.path[:-1]\
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if url_b.path.endswith('/')\
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else url_b.path
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return unquote(path_a) == unquote(path_b)
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def merge_two_infoboxes(infobox1, infobox2):
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if 'urls' in infobox2:
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urls1 = infobox1.get('urls', None)
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if urls1 is None:
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urls1 = []
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infobox1.set('urls', urls1)
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urlSet = set()
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for url in infobox1.get('urls', []):
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urlSet.add(url.get('url', None))
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for url in infobox2.get('urls', []):
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if url.get('url', None) not in urlSet:
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urls1.append(url)
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if 'attributes' in infobox2:
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attributes1 = infobox1.get('attributes', None)
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if attributes1 is None:
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attributes1 = []
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infobox1.set('attributes', attributes1)
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attributeSet = set()
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for attribute in infobox1.get('attributes', []):
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if attribute.get('label', None) not in attributeSet:
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attributeSet.add(attribute.get('label', None))
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for attribute in infobox2.get('attributes', []):
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attributes1.append(attribute)
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if 'content' in infobox2:
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content1 = infobox1.get('content', None)
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content2 = infobox2.get('content', '')
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if content1 is not None:
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if result_content_len(content2) > result_content_len(content1):
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infobox1['content'] = content2
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else:
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infobox1.set('content', content2)
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def result_score(result):
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weight = 1.0
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for result_engine in result['engines']:
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if hasattr(engines[result_engine], 'weight'):
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weight *= float(engines[result_engine].weight)
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occurences = len(result['positions'])
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return sum((occurences * weight) / position for position in result['positions'])
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class ResultContainer(object):
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"""docstring for ResultContainer"""
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def __init__(self):
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super(ResultContainer, self).__init__()
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self.results = defaultdict(list)
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self._merged_results = []
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self.infoboxes = []
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self._infobox_ids = {}
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self.suggestions = set()
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self.answers = set()
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def extend(self, engine_name, results):
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for result in list(results):
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if 'suggestion' in result:
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self.suggestions.add(result['suggestion'])
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results.remove(result)
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elif 'answer' in result:
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self.answers.add(result['suggestion'])
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results.remve(result)
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elif 'infobox' in result:
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self._merge_infobox(result)
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results.remove(result)
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with RLock():
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engines[engine_name].stats['search_count'] += 1
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engines[engine_name].stats['result_count'] += len(results)
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if not results:
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return
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self.results[engine_name].extend(results)
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for i, result in enumerate(results):
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position = i + 1
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self._merge_result(result, position)
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def _merge_infobox(self, infobox):
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add_infobox = True
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infobox_id = infobox.get('id', None)
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if infobox_id is not None:
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existingIndex = self._infobox_ids.get(infobox_id, None)
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if existingIndex is not None:
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merge_two_infoboxes(self.infoboxes[existingIndex], infobox)
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add_infobox = False
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if add_infobox:
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self.infoboxes.append(infobox)
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self._infobox_ids[infobox_id] = len(self.infoboxes) - 1
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def _merge_result(self, result, position):
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result['parsed_url'] = urlparse(result['url'])
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# if the result has no scheme, use http as default
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if not result['parsed_url'].scheme:
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result['parsed_url'] = result['parsed_url']._replace(scheme="http")
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result['host'] = result['parsed_url'].netloc
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if result['host'].startswith('www.'):
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result['host'] = result['host'].replace('www.', '', 1)
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result['engines'] = [result['engine']]
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# strip multiple spaces and cariage returns from content
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if result.get('content'):
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result['content'] = WHITESPACE_REGEX.sub(' ', result['content'])
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# check for duplicates
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duplicated = False
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for merged_result in self._merged_results:
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if compare_urls(result['parsed_url'], merged_result['parsed_url'])\
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and result.get('template') == merged_result.get('template'):
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duplicated = merged_result
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break
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# merge duplicates together
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if duplicated:
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# using content with more text
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if result_content_len(result.get('content', '')) >\
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result_content_len(duplicated.get('content', '')):
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duplicated['content'] = result['content']
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# add the new position
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duplicated['positions'].append(position)
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# add engine to list of result-engines
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duplicated['engines'].append(result['engine'])
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# using https if possible
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if duplicated['parsed_url'].scheme != 'https' and result['parsed_url'].scheme == 'https':
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duplicated['url'] = result['parsed_url'].geturl()
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duplicated['parsed_url'] = result['parsed_url']
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# if there is no duplicate found, append result
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else:
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result['positions'] = [position]
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with RLock():
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self._merged_results.append(result)
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def get_ordered_results(self):
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for result in self._merged_results:
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score = result_score(result)
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result['score'] = score
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with RLock():
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for result_engine in result['engines']:
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engines[result_engine].stats['score_count'] += score
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results = sorted(self._merged_results, key=itemgetter('score'), reverse=True)
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# pass 2 : group results by category and template
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gresults = []
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categoryPositions = {}
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for i, res in enumerate(results):
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# FIXME : handle more than one category per engine
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category = engines[res['engine']].categories[0] + ':' + ''\
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if 'template' not in res\
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else res['template']
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current = None if category not in categoryPositions\
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else categoryPositions[category]
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# group with previous results using the same category
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# if the group can accept more result and is not too far
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# from the current position
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if current is not None and (current['count'] > 0)\
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and (len(gresults) - current['index'] < 20):
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# group with the previous results using
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# the same category with this one
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index = current['index']
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gresults.insert(index, res)
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# update every index after the current one
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# (including the current one)
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for k in categoryPositions:
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v = categoryPositions[k]['index']
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if v >= index:
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categoryPositions[k]['index'] = v + 1
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# update this category
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current['count'] -= 1
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else:
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# same category
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gresults.append(res)
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# update categoryIndex
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categoryPositions[category] = {'index': len(gresults), 'count': 8}
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# return gresults
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return gresults
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def results_length(self):
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return len(self._merged_results)
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273
searx/search.py
273
searx/search.py
@ -16,13 +16,8 @@ along with searx. If not, see < http://www.gnu.org/licenses/ >.
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'''
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import threading
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import re
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import searx.poolrequests as requests_lib
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from itertools import izip_longest, chain
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from operator import itemgetter
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from Queue import Queue
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from time import time
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from urlparse import urlparse, unquote
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from searx import settings
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from searx.engines import (
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categories, engines
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@ -30,6 +25,7 @@ from searx.engines import (
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from searx.languages import language_codes
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from searx.utils import gen_useragent, get_blocked_engines
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from searx.query import Query
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from searx.results import ResultContainer
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from searx import logger
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logger = logger.getChild('search')
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@ -42,7 +38,8 @@ def search_request_wrapper(fn, url, engine_name, **kwargs):
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return fn(url, **kwargs)
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except:
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# increase errors stats
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engines[engine_name].stats['errors'] += 1
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with threading.RLock():
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engines[engine_name].stats['errors'] += 1
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# print engine name and specific error message
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logger.exception('engine crash: {0}'.format(engine_name))
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@ -84,7 +81,7 @@ def default_request_params():
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# create a callback wrapper for the search engine results
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def make_callback(engine_name, results_queue, callback, params):
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def make_callback(engine_name, callback, params, result_container):
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# creating a callback wrapper for the search engine results
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def process_callback(response, **kwargs):
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@ -96,12 +93,17 @@ def make_callback(engine_name, results_queue, callback, params):
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response.search_params = params
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timeout_overhead = 0.2 # seconds
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search_duration = time() - params['started']
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# update stats with current page-load-time
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with threading.RLock():
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engines[engine_name].stats['page_load_time'] += search_duration
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timeout_overhead = 0.2 # seconds
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timeout_limit = engines[engine_name].timeout + timeout_overhead
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if search_duration > timeout_limit:
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engines[engine_name].stats['page_load_time'] += timeout_limit
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engines[engine_name].stats['errors'] += 1
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with threading.RLock():
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engines[engine_name].stats['errors'] += 1
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return
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# callback
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@ -111,212 +113,11 @@ def make_callback(engine_name, results_queue, callback, params):
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for result in search_results:
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result['engine'] = engine_name
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results_queue.put_nowait((engine_name, search_results))
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# update stats with current page-load-time
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engines[engine_name].stats['page_load_time'] += search_duration
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result_container.extend(engine_name, search_results)
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return process_callback
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# return the meaningful length of the content for a result
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def content_result_len(content):
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if isinstance(content, basestring):
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content = re.sub('[,;:!?\./\\\\ ()-_]', '', content)
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return len(content)
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else:
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return 0
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# score results and remove duplications
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def score_results(results):
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# calculate scoring parameters
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flat_res = filter(
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None, chain.from_iterable(izip_longest(*results.values())))
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flat_len = len(flat_res)
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engines_len = len(results)
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results = []
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# pass 1: deduplication + scoring
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for i, res in enumerate(flat_res):
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res['parsed_url'] = urlparse(res['url'])
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# if the result has no scheme, use http as default
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if not res['parsed_url'].scheme:
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res['parsed_url'] = res['parsed_url']._replace(scheme="http")
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res['host'] = res['parsed_url'].netloc
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if res['host'].startswith('www.'):
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res['host'] = res['host'].replace('www.', '', 1)
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res['engines'] = [res['engine']]
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weight = 1.0
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# strip multiple spaces and cariage returns from content
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if res.get('content'):
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res['content'] = re.sub(' +', ' ',
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res['content'].strip().replace('\n', ''))
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# get weight of this engine if possible
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if hasattr(engines[res['engine']], 'weight'):
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weight = float(engines[res['engine']].weight)
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# calculate score for that engine
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score = int((flat_len - i) / engines_len) * weight + 1
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# check for duplicates
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duplicated = False
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for new_res in results:
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# remove / from the end of the url if required
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p1 = res['parsed_url'].path[:-1]\
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if res['parsed_url'].path.endswith('/')\
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else res['parsed_url'].path
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p2 = new_res['parsed_url'].path[:-1]\
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if new_res['parsed_url'].path.endswith('/')\
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else new_res['parsed_url'].path
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# check if that result is a duplicate
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if res['host'] == new_res['host'] and\
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unquote(p1) == unquote(p2) and\
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res['parsed_url'].query == new_res['parsed_url'].query and\
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res.get('template') == new_res.get('template'):
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duplicated = new_res
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break
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# merge duplicates together
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if duplicated:
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# using content with more text
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if content_result_len(res.get('content', '')) >\
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content_result_len(duplicated.get('content', '')):
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duplicated['content'] = res['content']
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# increase result-score
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duplicated['score'] += score
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# add engine to list of result-engines
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duplicated['engines'].append(res['engine'])
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# using https if possible
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if duplicated['parsed_url'].scheme == 'https':
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continue
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elif res['parsed_url'].scheme == 'https':
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duplicated['url'] = res['parsed_url'].geturl()
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duplicated['parsed_url'] = res['parsed_url']
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# if there is no duplicate found, append result
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else:
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res['score'] = score
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results.append(res)
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results = sorted(results, key=itemgetter('score'), reverse=True)
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# pass 2 : group results by category and template
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gresults = []
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categoryPositions = {}
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for i, res in enumerate(results):
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# FIXME : handle more than one category per engine
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category = engines[res['engine']].categories[0] + ':' + ''\
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if 'template' not in res\
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else res['template']
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current = None if category not in categoryPositions\
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else categoryPositions[category]
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# group with previous results using the same category
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# if the group can accept more result and is not too far
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# from the current position
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if current is not None and (current['count'] > 0)\
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and (len(gresults) - current['index'] < 20):
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# group with the previous results using
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# the same category with this one
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index = current['index']
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gresults.insert(index, res)
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# update every index after the current one
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# (including the current one)
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for k in categoryPositions:
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v = categoryPositions[k]['index']
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if v >= index:
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categoryPositions[k]['index'] = v + 1
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# update this category
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current['count'] -= 1
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else:
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# same category
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gresults.append(res)
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# update categoryIndex
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categoryPositions[category] = {'index': len(gresults), 'count': 8}
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# return gresults
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return gresults
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def merge_two_infoboxes(infobox1, infobox2):
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if 'urls' in infobox2:
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urls1 = infobox1.get('urls', None)
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if urls1 is None:
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urls1 = []
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infobox1.set('urls', urls1)
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urlSet = set()
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for url in infobox1.get('urls', []):
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urlSet.add(url.get('url', None))
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for url in infobox2.get('urls', []):
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if url.get('url', None) not in urlSet:
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urls1.append(url)
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if 'attributes' in infobox2:
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attributes1 = infobox1.get('attributes', None)
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if attributes1 is None:
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attributes1 = []
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infobox1.set('attributes', attributes1)
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attributeSet = set()
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for attribute in infobox1.get('attributes', []):
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if attribute.get('label', None) not in attributeSet:
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attributeSet.add(attribute.get('label', None))
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for attribute in infobox2.get('attributes', []):
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attributes1.append(attribute)
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if 'content' in infobox2:
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content1 = infobox1.get('content', None)
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content2 = infobox2.get('content', '')
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if content1 is not None:
|
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if content_result_len(content2) > content_result_len(content1):
|
||||
infobox1['content'] = content2
|
||||
else:
|
||||
infobox1.set('content', content2)
|
||||
|
||||
|
||||
def merge_infoboxes(infoboxes):
|
||||
results = []
|
||||
infoboxes_id = {}
|
||||
for infobox in infoboxes:
|
||||
add_infobox = True
|
||||
infobox_id = infobox.get('id', None)
|
||||
if infobox_id is not None:
|
||||
existingIndex = infoboxes_id.get(infobox_id, None)
|
||||
if existingIndex is not None:
|
||||
merge_two_infoboxes(results[existingIndex], infobox)
|
||||
add_infobox = False
|
||||
|
||||
if add_infobox:
|
||||
results.append(infobox)
|
||||
infoboxes_id[infobox_id] = len(results) - 1
|
||||
|
||||
return results
|
||||
|
||||
|
||||
class Search(object):
|
||||
|
||||
"""Search information container"""
|
||||
@ -334,10 +135,7 @@ class Search(object):
|
||||
# set blocked engines
|
||||
self.blocked_engines = get_blocked_engines(engines, request.cookies)
|
||||
|
||||
self.results = []
|
||||
self.suggestions = set()
|
||||
self.answers = set()
|
||||
self.infoboxes = []
|
||||
self.result_container = ResultContainer()
|
||||
self.request_data = {}
|
||||
|
||||
# set specific language if set
|
||||
@ -449,8 +247,6 @@ class Search(object):
|
||||
|
||||
# init vars
|
||||
requests = []
|
||||
results_queue = Queue()
|
||||
results = {}
|
||||
|
||||
# increase number of searches
|
||||
number_of_searches += 1
|
||||
@ -504,9 +300,9 @@ class Search(object):
|
||||
# create a callback wrapper for the search engine results
|
||||
callback = make_callback(
|
||||
selected_engine['name'],
|
||||
results_queue,
|
||||
engine.response,
|
||||
request_params)
|
||||
request_params,
|
||||
self.result_container)
|
||||
|
||||
# create dictionary which contain all
|
||||
# informations about the request
|
||||
@ -539,42 +335,5 @@ class Search(object):
|
||||
# send all search-request
|
||||
threaded_requests(requests)
|
||||
|
||||
while not results_queue.empty():
|
||||
engine_name, engine_results = results_queue.get_nowait()
|
||||
|
||||
# TODO type checks
|
||||
[self.suggestions.add(x['suggestion'])
|
||||
for x in list(engine_results)
|
||||
if 'suggestion' in x
|
||||
and engine_results.remove(x) is None]
|
||||
|
||||
[self.answers.add(x['answer'])
|
||||
for x in list(engine_results)
|
||||
if 'answer' in x
|
||||
and engine_results.remove(x) is None]
|
||||
|
||||
self.infoboxes.extend(x for x in list(engine_results)
|
||||
if 'infobox' in x
|
||||
and engine_results.remove(x) is None)
|
||||
|
||||
results[engine_name] = engine_results
|
||||
|
||||
# update engine-specific stats
|
||||
for engine_name, engine_results in results.items():
|
||||
engines[engine_name].stats['search_count'] += 1
|
||||
engines[engine_name].stats['result_count'] += len(engine_results)
|
||||
|
||||
# score results and remove duplications
|
||||
self.results = score_results(results)
|
||||
|
||||
# merge infoboxes according to their ids
|
||||
self.infoboxes = merge_infoboxes(self.infoboxes)
|
||||
|
||||
# update engine stats, using calculated score
|
||||
for result in self.results:
|
||||
for res_engine in result['engines']:
|
||||
engines[result['engine']]\
|
||||
.stats['score_count'] += result['score']
|
||||
|
||||
# return results, suggestions, answers and infoboxes
|
||||
return self
|
||||
|
41
searx/tests/test_results.py
Normal file
41
searx/tests/test_results.py
Normal file
@ -0,0 +1,41 @@
|
||||
# -*- coding: utf-8 -*-
|
||||
|
||||
from searx.results import ResultContainer
|
||||
from searx.testing import SearxTestCase
|
||||
|
||||
|
||||
def fake_result(url='https://aa.bb/cc?dd=ee#ff',
|
||||
title='aaa',
|
||||
content='bbb',
|
||||
engine='wikipedia', **kwargs):
|
||||
result = {'url': url,
|
||||
'title': title,
|
||||
'content': content,
|
||||
'engine': engine}
|
||||
result.update(kwargs)
|
||||
return result
|
||||
|
||||
|
||||
# TODO
|
||||
class ResultContainerTestCase(SearxTestCase):
|
||||
|
||||
def test_empty(self):
|
||||
c = ResultContainer()
|
||||
self.assertEqual(c.get_ordered_results(), [])
|
||||
|
||||
def test_one_result(self):
|
||||
c = ResultContainer()
|
||||
c.extend('wikipedia', [fake_result()])
|
||||
self.assertEqual(c.results_length(), 1)
|
||||
|
||||
def test_one_suggestion(self):
|
||||
c = ResultContainer()
|
||||
c.extend('wikipedia', [fake_result(suggestion=True)])
|
||||
self.assertEqual(len(c.suggestions), 1)
|
||||
self.assertEqual(c.results_length(), 0)
|
||||
|
||||
def test_result_merge(self):
|
||||
c = ResultContainer()
|
||||
c.extend('wikipedia', [fake_result()])
|
||||
c.extend('wikidata', [fake_result(), fake_result(url='https://example.com/')])
|
||||
self.assertEqual(c.results_length(), 2)
|
@ -1,25 +1,10 @@
|
||||
# -*- coding: utf-8 -*-
|
||||
|
||||
from searx.search import score_results
|
||||
from searx.testing import SearxTestCase
|
||||
|
||||
|
||||
def fake_result(url='https://aa.bb/cc?dd=ee#ff',
|
||||
title='aaa',
|
||||
content='bbb',
|
||||
engine='wikipedia'):
|
||||
return {'url': url,
|
||||
'title': title,
|
||||
'content': content,
|
||||
'engine': engine}
|
||||
# TODO
|
||||
class SearchTestCase(SearxTestCase):
|
||||
|
||||
|
||||
class ScoreResultsTestCase(SearxTestCase):
|
||||
|
||||
def test_empty(self):
|
||||
self.assertEqual(score_results(dict()), [])
|
||||
|
||||
def test_urlparse(self):
|
||||
results = score_results(dict(a=[fake_result(url='https://aa.bb/cc?dd=ee#ff')]))
|
||||
parsed_url = results[0]['parsed_url']
|
||||
self.assertEqual(parsed_url.query, 'dd=ee')
|
||||
def test_(self):
|
||||
pass
|
||||
|
@ -1,6 +1,7 @@
|
||||
# -*- coding: utf-8 -*-
|
||||
|
||||
import json
|
||||
from mock import Mock
|
||||
from urlparse import ParseResult
|
||||
from searx import webapp
|
||||
from searx.testing import SearxTestCase
|
||||
@ -33,7 +34,12 @@ class ViewsTestCase(SearxTestCase):
|
||||
]
|
||||
|
||||
def search_mock(search_self, *args):
|
||||
search_self.results = self.test_results
|
||||
search_self.result_container = Mock(get_ordered_results=lambda: self.test_results,
|
||||
answers=set(),
|
||||
suggestions=set(),
|
||||
infoboxes=[],
|
||||
results=self.test_results,
|
||||
results_length=lambda: len(self.test_results))
|
||||
|
||||
webapp.Search.search = search_mock
|
||||
|
||||
|
@ -383,7 +383,7 @@ def index():
|
||||
|
||||
plugins.call('post_search', request, locals())
|
||||
|
||||
for result in search.results:
|
||||
for result in search.result_container.get_ordered_results():
|
||||
|
||||
plugins.call('on_result', request, locals())
|
||||
if not search.paging and engines[result['engine']].paging:
|
||||
@ -411,7 +411,7 @@ def index():
|
||||
minutes = int((timedifference.seconds / 60) % 60)
|
||||
hours = int(timedifference.seconds / 60 / 60)
|
||||
if hours == 0:
|
||||
result['publishedDate'] = gettext(u'{minutes} minute(s) ago').format(minutes=minutes) # noqa
|
||||
result['publishedDate'] = gettext(u'{minutes} minute(s) ago').format(minutes=minutes)
|
||||
else:
|
||||
result['publishedDate'] = gettext(u'{hours} hour(s), {minutes} minute(s) ago').format(hours=hours, minutes=minutes) # noqa
|
||||
else:
|
||||
@ -419,17 +419,16 @@ def index():
|
||||
|
||||
if search.request_data.get('format') == 'json':
|
||||
return Response(json.dumps({'query': search.query,
|
||||
'results': search.results}),
|
||||
'results': search.result_container.get_ordered_results()}),
|
||||
mimetype='application/json')
|
||||
elif search.request_data.get('format') == 'csv':
|
||||
csv = UnicodeWriter(cStringIO.StringIO())
|
||||
keys = ('title', 'url', 'content', 'host', 'engine', 'score')
|
||||
if search.results:
|
||||
csv.writerow(keys)
|
||||
for row in search.results:
|
||||
row['host'] = row['parsed_url'].netloc
|
||||
csv.writerow([row.get(key, '') for key in keys])
|
||||
csv.stream.seek(0)
|
||||
csv.writerow(keys)
|
||||
for row in search.result_container.get_ordered_results():
|
||||
row['host'] = row['parsed_url'].netloc
|
||||
csv.writerow([row.get(key, '') for key in keys])
|
||||
csv.stream.seek(0)
|
||||
response = Response(csv.stream.read(), mimetype='application/csv')
|
||||
cont_disp = 'attachment;Filename=searx_-_{0}.csv'.format(search.query)
|
||||
response.headers.add('Content-Disposition', cont_disp)
|
||||
@ -437,24 +436,24 @@ def index():
|
||||
elif search.request_data.get('format') == 'rss':
|
||||
response_rss = render(
|
||||
'opensearch_response_rss.xml',
|
||||
results=search.results,
|
||||
results=search.result_container.get_ordered_results(),
|
||||
q=search.request_data['q'],
|
||||
number_of_results=len(search.results),
|
||||
number_of_results=search.result_container.results_length(),
|
||||
base_url=get_base_url()
|
||||
)
|
||||
return Response(response_rss, mimetype='text/xml')
|
||||
|
||||
return render(
|
||||
'results.html',
|
||||
results=search.results,
|
||||
results=search.result_container.get_ordered_results(),
|
||||
q=search.request_data['q'],
|
||||
selected_categories=search.categories,
|
||||
paging=search.paging,
|
||||
pageno=search.pageno,
|
||||
base_url=get_base_url(),
|
||||
suggestions=search.suggestions,
|
||||
answers=search.answers,
|
||||
infoboxes=search.infoboxes,
|
||||
suggestions=search.result_container.suggestions,
|
||||
answers=search.result_container.answers,
|
||||
infoboxes=search.result_container.infoboxes,
|
||||
theme=get_current_theme_name(),
|
||||
favicons=global_favicons[themes.index(get_current_theme_name())]
|
||||
)
|
||||
|
Loading…
Reference in New Issue
Block a user