# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
"""This is the implementation of the google images engine.
.. 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: ;"
.. _data URLs:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs
"""
from urllib.parse import urlencode, unquote
from lxml import html
from searx import logger
from searx.utils import (
eval_xpath,
eval_xpath_list,
eval_xpath_getindex,
extract_text,
)
from searx.engines.google import (
get_lang_info,
time_range_dict,
detect_google_sorry,
)
# pylint: disable=unused-import
from searx.engines.google import (
supported_languages_url
, _fetch_supported_languages
)
# pylint: enable=unused-import
logger = logger.getChild('google images')
# about
about = {
"website": 'https://images.google.com',
"wikidata_id": 'Q521550',
"official_api_documentation": 'https://developers.google.com/custom-search',
"use_official_api": False,
"require_api_key": False,
"results": 'HTML',
}
# engine dependent config
categories = ['images']
paging = False
use_locale_domain = True
time_range_support = True
safesearch = True
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
def scrap_img_by_id(script, data_id):
"""Get full image URL by data-id in parent element
"""
img_url = ''
_script = script.split('\n')
for i, line in enumerate(_script):
if 'gstatic.com/images' in line and data_id in line and i + 1 < len(_script):
url_line = _script[i + 1]
img_url = url_line.split('"')[1]
img_url = unquote(img_url.replace(r'\u00', r'%'))
return img_url
def request(query, params):
"""Google-Video search request"""
lang_info = get_lang_info(
# pylint: disable=undefined-variable
params, supported_languages, language_aliases, False
)
logger.debug(
"HTTP header Accept-Language --> %s", lang_info['headers']['Accept-Language'])
query_url = 'https://' + lang_info['subdomain'] + '/search' + "?" + urlencode({
'q': query,
'tbm': "isch",
**lang_info['params'],
'ie': "utf8",
'oe': "utf8",
'num': 30,
})
if params['time_range'] in time_range_dict:
query_url += '&' + urlencode({'tbs': 'qdr:' + time_range_dict[params['time_range']]})
if params['safesearch']:
query_url += '&' + urlencode({'safe': filter_mapping[params['safesearch']]})
params['url'] = query_url
params['headers'].update(lang_info['headers'])
params['headers']['Accept'] = (
'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8'
)
return params
def response(resp):
"""Get response from google's search request"""
results = []
detect_google_sorry(resp)
# convert the text to dom
dom = html.fromstring(resp.text)
img_bas64_map = scrap_out_thumbs(dom)
img_src_script = eval_xpath_getindex(
dom, '//script[contains(., "AF_initDataCallback({key: ")]', 1).text
# parse results
#
# 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 link to the origin PNG, JPG or whatever is given
# 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_list(root, './/img[contains(@class, "rg_i")]'):
img_alt = eval_xpath_getindex(img_node, '@alt', 0)
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 = ''
link_node = eval_xpath_getindex(img_node, '../../../a[2]', 0)
url = eval_xpath_getindex(link_node, '@href', 0)
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])
img_src_id = eval_xpath_getindex(img_node, '../../../@data-id', 0)
src_url = scrap_img_by_id(img_src_script, img_src_id)
if not src_url:
src_url = thumbnail_src
results.append({
'url': url,
'title': img_alt,
'content': pub_descr,
'source': pub_source,
'img_src': src_url,
# 'img_format': img_format,
'thumbnail_src': thumbnail_src,
'template': 'images.html'
})
return results
Reference in New Issue View Git Blame Copy Permalink