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[fix] revise google images engine 

this commit is picked from #1985
This commit is contained in:
Markus Heiser 2020-07-07 21:59:15 +02:00 committed by Adam Tauber
parent 410c2f903d
commit 16f8ec894a
1 changed files with 170 additions and 62 deletions
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searx/engines/google_images.py
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@ -1,97 +1,205 @@
"""
Google (Images)
# SPDX-License-Identifier: AGPL-3.0-or-later
"""Google (Images)
@website https://www.google.com
@provide-api yes (https://developers.google.com/custom-search/)
:website: https://images.google.com (redirected to subdomain www.)
:provide-api: yes (https://developers.google.com/custom-search/)
:using-api: not the offical, since it needs registration to another service
:results: HTML
:stable: no
:template: images.html
:parse: url, title, content, source, thumbnail_src, img_src
For detailed description of the *REST-full* API see: `Query Parameter
Definitions`_.
.. _admonition:: Content-Security-Policy (CSP)
This engine needs to allow images from the `data URLs`_ (prefixed with the
``data:` scheme).::
Header set Content-Security-Policy "img-src 'self' data: ;"
.. _Query Parameter Definitions:
https://developers.google.com/custom-search/docs/xml_results#WebSearch_Query_Parameter_Definitions
@using-api no
@results HTML chunks with JSON inside
@stable no
@parse url, title, img_src
"""
from datetime import date, timedelta
from json import loads
from lxml import html
from searx.url_utils import urlencode
from flask_babel import gettext
from searx import logger
from searx.url_utils import urlencode, urlparse
from searx.utils import eval_xpath
from searx.engines.xpath import extract_text
# pylint: disable=unused-import
from searx.engines.google import (
supported_languages_url
, _fetch_supported_languages
)
# pylint: enable=unused-import
from searx.engines.google import (
get_lang_country
, google_domains
, time_range_dict
)
logger = logger.getChild('google images')
# engine dependent config
categories = ['images']
paging = True
safesearch = True
paging = False
language_support = True
use_locale_domain = True
time_range_support = True
number_of_results = 100
safesearch = True
search_url = 'https://www.google.com/search'\
'?{query}'\
'&tbm=isch'\
'&yv=2'\
'&{search_options}'
time_range_attr = "qdr:{range}"
time_range_custom_attr = "cdr:1,cd_min:{start},cd_max{end}"
time_range_dict = {'day': 'd',
'week': 'w',
'month': 'm'}
filter_mapping = {
0 : 'images',
1 : 'active',
2 : 'active'
}
def scrap_out_thumbs(dom):
"""Scrap out thumbnail data from <script> tags.
"""
ret_val = dict()
for script in eval_xpath(dom, '//script[contains(., "_setImgSrc(")]'):
_script = script.text
# _setImgSrc('0','data:image\/jpeg;base64,\/9j\/4AAQSkZJR ....');
_thumb_no, _img_data = _script[len("_setImgSrc("):-2].split(",",1)
_thumb_no = _thumb_no.replace("'","")
_img_data = _img_data.replace("'","")
_img_data = _img_data.replace(r"\/", r"/")
ret_val[_thumb_no] = _img_data.replace(r"\x3d", "=")
return ret_val
# do search-request
def request(query, params):
search_options = {
'ijn': params['pageno'] - 1,
'start': (params['pageno'] - 1) * number_of_results
}
"""Google-Video search request"""
language, country, lang_country = get_lang_country(
# pylint: disable=undefined-variable
params, supported_languages, language_aliases
)
subdomain = 'www.' + google_domains.get(country.upper(), 'google.com')
query_url = 'https://'+ subdomain + '/search' + "?" + urlencode({
'q': query,
'tbm': "isch",
'hl': lang_country,
'lr': "lang_" + language,
'ie': "utf8",
'oe': "utf8",
'num': 30,
})
if params['time_range'] in time_range_dict:
search_options['tbs'] = time_range_attr.format(range=time_range_dict[params['time_range']])
elif params['time_range'] == 'year':
now = date.today()
then = now - timedelta(days=365)
start = then.strftime('%m/%d/%Y')
end = now.strftime('%m/%d/%Y')
search_options['tbs'] = time_range_custom_attr.format(start=start, end=end)
query_url += '&' + urlencode({'tbs': 'qdr:' + time_range_dict[params['time_range']]})
if params['safesearch']:
query_url += '&' + urlencode({'safe': filter_mapping[params['safesearch']]})
if safesearch and params['safesearch']:
search_options['safe'] = 'on'
params['url'] = search_url.format(query=urlencode({'q': query}),
search_options=urlencode(search_options))
params['url'] = query_url
logger.debug("query_url --> %s", query_url)
params['headers']['Accept-Language'] = (
"%s,%s;q=0.8,%s;q=0.5" % (lang_country, language, language))
logger.debug(
"HTTP Accept-Language --> %s", params['headers']['Accept-Language'])
params['headers']['Accept'] = (
'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8'
)
#params['google_subdomain'] = subdomain
return params
# get response from search-request
def response(resp):
"""Get response from google's search request"""
results = []
# detect google sorry
resp_url = urlparse(resp.url)
if resp_url.netloc == 'sorry.google.com' or resp_url.path == '/sorry/IndexRedirect':
raise RuntimeWarning('sorry.google.com')
if resp_url.path.startswith('/sorry'):
raise RuntimeWarning(gettext('CAPTCHA required'))
# which subdomain ?
# subdomain = resp.search_params.get('google_subdomain')
# convert the text to dom
dom = html.fromstring(resp.text)
img_bas64_map = scrap_out_thumbs(dom)
# parse results
for result in dom.xpath('//div[contains(@class, "rg_meta")]/text()'):
#
# root element::
# <div id="islmp" ..>
# result div per image::
# <div jsmodel="tTXmib"> / <div jsaction="..." data-id="..."
# The data-id matches to a item in a json-data structure in::
# <script nonce="I+vqelcy/01CKiBJi5Z1Ow">AF_initDataCallback({key: 'ds:1', ... data:function(){return [ ...
# In this structure the ling to the origin PNG, JPG or whatever is given
# (we do not blow out the link there, you could still implement that)
# first link per image-div contains a <img> with the data-iid for bas64 encoded image data::
# <img class="rg_i Q4LuWd" data-iid="0"
# second link per image-div is the target link::
# <a class="VFACy kGQAp" href="https://en.wikipedia.org/wiki/The_Sacrament_of_the_Last_Supper">
# the second link also contains two div tags with the *description* and *publisher*::
# <div class="WGvvNb">The Sacrament of the Last Supper ...</div>
# <div class="fxgdke">en.wikipedia.org</div>
root = eval_xpath(dom, '//div[@id="islmp"]')
if not root:
logger.error("did not find root element id='islmp'")
return results
root = root[0]
for img_node in eval_xpath(root, './/img[contains(@class, "rg_i")]'):
try:
metadata = loads(result)
img_alt = eval_xpath(img_node, '@alt')[0]
img_format = metadata.get('ity', '')
img_width = metadata.get('ow', '')
img_height = metadata.get('oh', '')
if img_width and img_height:
img_format += " {0}x{1}".format(img_width, img_height)
img_base64_id = eval_xpath(img_node, '@data-iid')
if img_base64_id:
img_base64_id = img_base64_id[0]
thumbnail_src = img_bas64_map[img_base64_id]
else:
thumbnail_src = eval_xpath(img_node, '@src')
if not thumbnail_src:
thumbnail_src = eval_xpath(img_node, '@data-src')
if thumbnail_src:
thumbnail_src = thumbnail_src[0]
else:
thumbnail_src = ''
source = metadata.get('st', '')
source_url = metadata.get('isu', '')
if source_url:
source += " ({0})".format(source_url)
link_node = eval_xpath(img_node, '../../../a[2]')[0]
url = eval_xpath(link_node, '@href')[0]
results.append({'url': metadata['ru'],
'title': metadata['pt'],
'content': metadata.get('s', ''),
'source': source,
'img_format': img_format,
'thumbnail_src': metadata['tu'],
'img_src': metadata['ou'],
'template': 'images.html'})
pub_nodes = eval_xpath(link_node, './div/div')
pub_descr = img_alt
pub_source = ''
if pub_nodes:
pub_descr = extract_text(pub_nodes[0])
pub_source = extract_text(pub_nodes[1])
except:
results.append({
'url': url,
'title': img_alt,
'content': pub_descr,
'source': pub_source,
'img_src': url,
# 'img_format': img_format,
'thumbnail_src': thumbnail_src,
'template': 'images.html'
})
except Exception as e: # pylint: disable=broad-except
logger.error(e, exc_info=True)
#from lxml import etree
#logger.debug(etree.tostring(img_node, pretty_print=True))
#import pdb
#pdb.set_trace()
continue
return results