mirror of
https://github.com/searxng/searxng.git
synced 2024-11-14 16:50:11 +01:00
add comments to search.py
* add comments * add licence-header
This commit is contained in:
Thomas Pointhuber
parent
d23dd7e276
commit
c9bab0e833
118
searx/search.py
118
searx/search.py
@ -1,3 +1,20 @@
|
||||
'''
|
||||
searx is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU Affero General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
searx is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU Affero General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Affero General Public License
|
||||
along with searx. If not, see < http://www.gnu.org/licenses/ >.
|
||||
|
||||
(C) 2013- by Adam Tauber, <asciimoo@gmail.com>
|
||||
'''
|
||||
|
||||
import grequests
|
||||
from itertools import izip_longest, chain
|
||||
from datetime import datetime
|
||||
@ -9,46 +26,67 @@ from searx.engines import (
|
||||
from searx.languages import language_codes
|
||||
from searx.utils import gen_useragent
|
||||
|
||||
|
||||
number_of_searches = 0
|
||||
|
||||
|
||||
# get default reqest parameter
|
||||
def default_request_params():
|
||||
return {
|
||||
'method': 'GET', 'headers': {}, 'data': {}, 'url': '', 'cookies': {}}
|
||||
|
||||
|
||||
# create a callback wrapper for the search engine results
|
||||
def make_callback(engine_name, results, suggestions, callback, params):
|
||||
|
||||
# creating a callback wrapper for the search engine results
|
||||
def process_callback(response, **kwargs):
|
||||
cb_res = []
|
||||
response.search_params = params
|
||||
|
||||
# update stats with current page-load-time
|
||||
engines[engine_name].stats['page_load_time'] += \
|
||||
(datetime.now() - params['started']).total_seconds()
|
||||
|
||||
try:
|
||||
search_results = callback(response)
|
||||
except Exception, e:
|
||||
# increase errors stats
|
||||
engines[engine_name].stats['errors'] += 1
|
||||
results[engine_name] = cb_res
|
||||
|
||||
# print engine name and specific error message
|
||||
print '[E] Error with engine "{0}":\n\t{1}'.format(
|
||||
engine_name, str(e))
|
||||
return
|
||||
|
||||
for result in search_results:
|
||||
result['engine'] = engine_name
|
||||
|
||||
# if it is a suggestion, add it to list of suggestions
|
||||
if 'suggestion' in result:
|
||||
# TODO type checks
|
||||
suggestions.add(result['suggestion'])
|
||||
continue
|
||||
|
||||
# append result
|
||||
cb_res.append(result)
|
||||
|
||||
results[engine_name] = cb_res
|
||||
|
||||
return process_callback
|
||||
|
||||
|
||||
# score results and remove duplications
|
||||
def score_results(results):
|
||||
# calculate scoring parameters
|
||||
flat_res = filter(
|
||||
None, chain.from_iterable(izip_longest(*results.values())))
|
||||
flat_len = len(flat_res)
|
||||
engines_len = len(results)
|
||||
|
||||
results = []
|
||||
|
||||
# deduplication + scoring
|
||||
for i, res in enumerate(flat_res):
|
||||
|
||||
@ -62,34 +100,54 @@ def score_results(results):
|
||||
res['engines'] = [res['engine']]
|
||||
weight = 1.0
|
||||
|
||||
# get weight of this engine if possible
|
||||
if hasattr(engines[res['engine']], 'weight'):
|
||||
weight = float(engines[res['engine']].weight)
|
||||
|
||||
# calculate score for that engine
|
||||
score = int((flat_len - i) / engines_len) * weight + 1
|
||||
|
||||
duplicated = False
|
||||
|
||||
# check for duplicates
|
||||
for new_res in results:
|
||||
# remove / from the end of the url if required
|
||||
p1 = res['parsed_url'].path[:-1] if res['parsed_url'].path.endswith('/') else res['parsed_url'].path # noqa
|
||||
p2 = new_res['parsed_url'].path[:-1] if new_res['parsed_url'].path.endswith('/') else new_res['parsed_url'].path # noqa
|
||||
|
||||
# check if that result is a duplicate
|
||||
if res['host'] == new_res['host'] and\
|
||||
unquote(p1) == unquote(p2) and\
|
||||
res['parsed_url'].query == new_res['parsed_url'].query and\
|
||||
res.get('template') == new_res.get('template'):
|
||||
duplicated = new_res
|
||||
break
|
||||
|
||||
# merge duplicates together
|
||||
if duplicated:
|
||||
# using content with more text
|
||||
if res.get('content') > duplicated.get('content'):
|
||||
duplicated['content'] = res['content']
|
||||
|
||||
# increase result-score
|
||||
duplicated['score'] += score
|
||||
|
||||
# add engine to list of result-engines
|
||||
duplicated['engines'].append(res['engine'])
|
||||
|
||||
# using https if possible
|
||||
if duplicated['parsed_url'].scheme == 'https':
|
||||
continue
|
||||
elif res['parsed_url'].scheme == 'https':
|
||||
duplicated['url'] = res['parsed_url'].geturl()
|
||||
duplicated['parsed_url'] = res['parsed_url']
|
||||
|
||||
# if there is no duplicate found, append result
|
||||
else:
|
||||
res['score'] = score
|
||||
results.append(res)
|
||||
|
||||
# return results sorted by score
|
||||
return sorted(results, key=itemgetter('score'), reverse=True)
|
||||
|
||||
|
||||
@ -98,6 +156,7 @@ class Search(object):
|
||||
"""Search information container"""
|
||||
|
||||
def __init__(self, request):
|
||||
# init vars
|
||||
super(Search, self).__init__()
|
||||
self.query = None
|
||||
self.engines = []
|
||||
@ -105,18 +164,23 @@ class Search(object):
|
||||
self.paging = False
|
||||
self.pageno = 1
|
||||
self.lang = 'all'
|
||||
|
||||
# set blocked engines
|
||||
if request.cookies.get('blocked_engines'):
|
||||
self.blocked_engines = request.cookies['blocked_engines'].split(',') # noqa
|
||||
else:
|
||||
self.blocked_engines = []
|
||||
|
||||
self.results = []
|
||||
self.suggestions = []
|
||||
self.request_data = {}
|
||||
|
||||
# set specific language if set
|
||||
if request.cookies.get('language')\
|
||||
and request.cookies['language'] in (x[0] for x in language_codes):
|
||||
self.lang = request.cookies['language']
|
||||
|
||||
# set request method
|
||||
if request.method == 'POST':
|
||||
self.request_data = request.form
|
||||
else:
|
||||
@ -126,51 +190,72 @@ class Search(object):
|
||||
if not self.request_data.get('q'):
|
||||
raise Exception('noquery')
|
||||
|
||||
# set query
|
||||
self.query = self.request_data['q']
|
||||
|
||||
# set pagenumber
|
||||
pageno_param = self.request_data.get('pageno', '1')
|
||||
if not pageno_param.isdigit() or int(pageno_param) < 1:
|
||||
raise Exception('wrong pagenumber')
|
||||
|
||||
self.pageno = int(pageno_param)
|
||||
|
||||
# parse query, if tags are set, which change the serch engine or search-language
|
||||
self.parse_query()
|
||||
|
||||
self.categories = []
|
||||
|
||||
# if engines are calculated from query, set categories by using that informations
|
||||
if self.engines:
|
||||
self.categories = list(set(engine['category']
|
||||
for engine in self.engines))
|
||||
|
||||
# otherwise, using defined categories to calculate which engines should be used
|
||||
else:
|
||||
# set used categories
|
||||
for pd_name, pd in self.request_data.items():
|
||||
if pd_name.startswith('category_'):
|
||||
category = pd_name[9:]
|
||||
# if category is not found in list, skip
|
||||
if not category in categories:
|
||||
continue
|
||||
|
||||
# add category to list
|
||||
self.categories.append(category)
|
||||
|
||||
# if no category is specified for this search, using user-defined default-configuration which (is stored in cookie)
|
||||
if not self.categories:
|
||||
cookie_categories = request.cookies.get('categories', '')
|
||||
cookie_categories = cookie_categories.split(',')
|
||||
for ccateg in cookie_categories:
|
||||
if ccateg in categories:
|
||||
self.categories.append(ccateg)
|
||||
|
||||
# if still no category is specified, using general as default-category
|
||||
if not self.categories:
|
||||
self.categories = ['general']
|
||||
|
||||
# using all engines for that search, which are declared under the specific categories
|
||||
for categ in self.categories:
|
||||
self.engines.extend({'category': categ,
|
||||
'name': x.name}
|
||||
for x in categories[categ]
|
||||
if not x.name in self.blocked_engines)
|
||||
|
||||
# parse query, if tags are set, which change the serch engine or search-language
|
||||
def parse_query(self):
|
||||
query_parts = self.query.split()
|
||||
modified = False
|
||||
|
||||
# check if language-prefix is set
|
||||
if query_parts[0].startswith(':'):
|
||||
lang = query_parts[0][1:].lower()
|
||||
|
||||
# check if any language-code equal with declared language-codes
|
||||
for lc in language_codes:
|
||||
lang_id, lang_name, country = map(str.lower, lc)
|
||||
|
||||
# if correct language-code is found, set it as new search-language
|
||||
if lang == lang_id\
|
||||
or lang_id.startswith(lang)\
|
||||
or lang == lang_name\
|
||||
@ -179,56 +264,78 @@ class Search(object):
|
||||
modified = True
|
||||
break
|
||||
|
||||
# check if category/engine prefix is set
|
||||
elif query_parts[0].startswith('!'):
|
||||
prefix = query_parts[0][1:].replace('_', ' ')
|
||||
|
||||
# check if prefix equal with engine shortcut
|
||||
if prefix in engine_shortcuts\
|
||||
and not engine_shortcuts[prefix] in self.blocked_engines:
|
||||
modified = True
|
||||
self.engines.append({'category': 'none',
|
||||
'name': engine_shortcuts[prefix]})
|
||||
|
||||
# check if prefix equal with engine name
|
||||
elif prefix in engines\
|
||||
and not prefix in self.blocked_engines:
|
||||
modified = True
|
||||
self.engines.append({'category': 'none',
|
||||
'name': prefix})
|
||||
|
||||
# check if prefix equal with categorie name
|
||||
elif prefix in categories:
|
||||
modified = True
|
||||
# using all engines for that search, which are declared under that categorie name
|
||||
self.engines.extend({'category': prefix,
|
||||
'name': engine.name}
|
||||
for engine in categories[prefix]
|
||||
if not engine in self.blocked_engines)
|
||||
|
||||
# if language, category or engine were specificed in this query, search for more tags which does the same
|
||||
if modified:
|
||||
self.query = self.query.replace(query_parts[0], '', 1).strip()
|
||||
self.parse_query()
|
||||
|
||||
# do search-request
|
||||
def search(self, request):
|
||||
global number_of_searches
|
||||
|
||||
# init vars
|
||||
requests = []
|
||||
results = {}
|
||||
suggestions = set()
|
||||
|
||||
# increase number of active searches
|
||||
number_of_searches += 1
|
||||
|
||||
# set default useragent
|
||||
#user_agent = request.headers.get('User-Agent', '')
|
||||
user_agent = gen_useragent()
|
||||
|
||||
# start search-reqest for all selected engines
|
||||
for selected_engine in self.engines:
|
||||
if selected_engine['name'] not in engines:
|
||||
continue
|
||||
|
||||
engine = engines[selected_engine['name']]
|
||||
|
||||
# if paging is not supported, skip
|
||||
if self.pageno > 1 and not engine.paging:
|
||||
continue
|
||||
|
||||
# if search-language is set and engine does not provide language-support, skip
|
||||
if self.lang != 'all' and not engine.language_support:
|
||||
continue
|
||||
|
||||
# set default request parameters
|
||||
request_params = default_request_params()
|
||||
request_params['headers']['User-Agent'] = user_agent
|
||||
request_params['category'] = selected_engine['category']
|
||||
request_params['started'] = datetime.now()
|
||||
request_params['pageno'] = self.pageno
|
||||
request_params['language'] = self.lang
|
||||
|
||||
# update request parameters dependent on search-engine (contained in engines folder)
|
||||
request_params = engine.request(self.query.encode('utf-8'),
|
||||
request_params)
|
||||
|
||||
@ -236,6 +343,7 @@ class Search(object):
|
||||
# TODO add support of offline engines
|
||||
pass
|
||||
|
||||
# create a callback wrapper for the search engine results
|
||||
callback = make_callback(
|
||||
selected_engine['name'],
|
||||
results,
|
||||
@ -244,6 +352,7 @@ class Search(object):
|
||||
request_params
|
||||
)
|
||||
|
||||
# create dictionary which contain all informations about the request
|
||||
request_args = dict(
|
||||
headers=request_params['headers'],
|
||||
hooks=dict(response=callback),
|
||||
@ -251,6 +360,7 @@ class Search(object):
|
||||
timeout=engine.timeout
|
||||
)
|
||||
|
||||
# specific type of request (GET or POST)
|
||||
if request_params['method'] == 'GET':
|
||||
req = grequests.get
|
||||
else:
|
||||
@ -261,17 +371,25 @@ class Search(object):
|
||||
if not request_params['url']:
|
||||
continue
|
||||
|
||||
# append request to list
|
||||
requests.append(req(request_params['url'], **request_args))
|
||||
|
||||
# send all search-request
|
||||
grequests.map(requests)
|
||||
|
||||
# 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
|
||||
results = score_results(results)
|
||||
|
||||
# update engine stats, using calculated score
|
||||
for result in results:
|
||||
for res_engine in result['engines']:
|
||||
engines[result['engine']]\
|
||||
.stats['score_count'] += result['score']
|
||||
|
||||
# return results and suggestions
|
||||
return results, suggestions
|
||||
|
||||
Loading…
Reference in New Issue
Block a user