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Merge pull request #99 from dalf/master

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[enh] stick results from the same category and template and [fix] rewrite the google engine
This commit is contained in:
Adam Tauber 2014-09-14 18:57:08 +02:00
commit 090254feca
2 changed files with 120 additions and 26 deletions
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106
searx/engines/google.py
View File

@ -1,15 +1,17 @@
## Google (Web)
#
# @website https://www.google.com
# @provide-api yes (https://developers.google.com/web-search/docs/), deprecated!
# @provide-api yes (https://developers.google.com/custom-search/)
#
# @using-api yes
# @results JSON
# @stable yes (but deprecated)
# @parse url, title, content
# @using-api no
# @results HTML
# @stable no (HTML can change)
# @parse url, title, content, suggestion
from urllib import urlencode
from json import loads
from urlparse import unquote,urlparse,parse_qsl
from lxml import html
from searx.engines.xpath import extract_text, extract_url
# engine dependent config
categories = ['general']
@ -17,21 +19,45 @@ paging = True
language_support = True
# search-url
url = 'https://ajax.googleapis.com/'
search_url = url + 'ajax/services/search/web?v=2.0&start={offset}&rsz=large&safe=off&filter=off&{query}&hl={language}' # noqa
google_hostname = 'www.google.com'
search_path = '/search'
redirect_path = '/url'
images_path = '/images'
search_url = 'https://' + google_hostname + search_path + '?{query}&start={offset}&gbv=1'
# specific xpath variables
results_xpath= '//li[@class="g"]'
url_xpath = './/h3/a/@href'
title_xpath = './/h3'
content_xpath = './/span[@class="st"]'
suggestion_xpath = '//p[@class="_Bmc"]'
images_xpath = './/div/a'
image_url_xpath = './@href'
image_img_src_xpath = './img/@src'
# remove google-specific tracking-url
def parse_url(url_string):
parsed_url = urlparse(url_string)
if parsed_url.netloc in [google_hostname, ''] and parsed_url.path==redirect_path:
query = dict(parse_qsl(parsed_url.query))
return query['q']
else:
return url_string
# do search-request
def request(query, params):
offset = (params['pageno'] - 1) * 8
offset = (params['pageno'] - 1) * 10
language = 'en-US'
if params['language'] != 'all':
language = params['language'].replace('_', '-')
if params['language'] == 'all':
language = 'en'
else:
language = params['language'].replace('_','-').lower()
params['url'] = search_url.format(offset=offset,
query=urlencode({'q': query}),
language=language)
query=urlencode({'q': query}))
params['headers']['Accept-Language'] = language
return params
@ -40,18 +66,50 @@ def request(query, params):
def response(resp):
results = []
search_res = loads(resp.text)
# return empty array if there are no results
if not search_res.get('responseData', {}).get('results'):
return []
dom = html.fromstring(resp.text)
# parse results
for result in search_res['responseData']['results']:
# append result
results.append({'url': result['unescapedUrl'],
'title': result['titleNoFormatting'],
'content': result['content']})
for result in dom.xpath(results_xpath):
title = extract_text(result.xpath(title_xpath)[0])
try:
url = parse_url(extract_url(result.xpath(url_xpath), search_url))
parsed_url = urlparse(url)
if parsed_url.netloc==google_hostname and parsed_url.path==search_path:
# remove the link to google news
continue
if parsed_url.netloc==google_hostname and parsed_url.path==images_path:
# images result
results = results + parse_images(result)
else:
# normal result
content = extract_text(result.xpath(content_xpath)[0])
# append result
results.append({'url': url,
'title': title,
'content': content})
except:
continue
# parse suggestion
for suggestion in dom.xpath(suggestion_xpath):
# append suggestion
results.append({'suggestion': extract_text(suggestion)})
# return results
return results
def parse_images(result):
results = []
for image in result.xpath(images_xpath):
url = parse_url(extract_text(image.xpath(image_url_xpath)[0]))
img_src = extract_text(image.xpath(image_img_src_xpath)[0])
# append result
results.append({'url': url,
'title': '',
'content': '',
'img_src': img_src,
'template': 'images.html'})
return results

40
searx/search.py
View File

@ -49,7 +49,8 @@ def score_results(results):
flat_len = len(flat_res)
engines_len = len(results)
results = []
# deduplication + scoring
# pass 1: deduplication + scoring
for i, res in enumerate(flat_res):
res['parsed_url'] = urlparse(res['url'])
@ -90,7 +91,42 @@ def score_results(results):
else:
res['score'] = score
results.append(res)
return sorted(results, key=itemgetter('score'), reverse=True)
results = sorted(results, key=itemgetter('score'), reverse=True)
# pass 2 : group results by category and template
gresults = []
categoryPositions = {}
for i, res in enumerate(results):
# FIXME : handle more than one category per engine
category = engines[res['engine']].categories[0] + ':' + '' if 'template' not in res else res['template']
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 != 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 }
# return gresults
return gresults
class Search(object):