From df5f8d0e8ef2ef49f2ca424305ce3436a6145189 Mon Sep 17 00:00:00 2001
From: Emilien Devos <contact@emiliendevos.be>
Date: Tue, 20 Sep 2022 20:35:55 +0200
Subject: [PATCH] use the internal API for google images

---
 searx/engines/google_images.py | 185 +++++++--------------------------
 1 file changed, 35 insertions(+), 150 deletions(-)

diff --git a/searx/engines/google_images.py b/searx/engines/google_images.py
index e1f676dd6..ab93f5580 100644
--- a/searx/engines/google_images.py
+++ b/searx/engines/google_images.py
@@ -1,6 +1,12 @@
 # SPDX-License-Identifier: AGPL-3.0-or-later
 # lint: pylint
-"""This is the implementation of the google images engine.
+"""This is the implementation of the google images engine using the google internal API used the Google Go Android app.
+This internal API offer results in
+- JSON (_fmt:json)
+- Protobuf (_fmt:pb)
+- Protobuf compressed? (_fmt:pc)
+- HTML (_fmt:html)
+- Protobuf encoded in JSON (_fmt:jspb).
 
 .. admonition:: Content-Security-Policy (CSP)
 
@@ -13,16 +19,8 @@
    https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs
 """
 
-import re
-from urllib.parse import urlencode, unquote
-from lxml import html
-
-from searx.utils import (
-    eval_xpath,
-    eval_xpath_list,
-    eval_xpath_getindex,
-    extract_text,
-)
+from urllib.parse import urlencode
+from json import loads
 
 from searx.engines.google import (
     get_lang_info,
@@ -42,12 +40,12 @@ about = {
     "official_api_documentation": 'https://developers.google.com/custom-search',
     "use_official_api": False,
     "require_api_key": False,
-    "results": 'HTML',
+    "results": 'JSON',
 }
 
 # engine dependent config
 categories = ['images', 'web']
-paging = False
+paging = True
 use_locale_domain = True
 time_range_support = True
 safesearch = True
@@ -56,74 +54,8 @@ send_accept_language_header = True
 filter_mapping = {0: 'images', 1: 'active', 2: 'active'}
 
 
-def scrap_out_thumbs(dom):
-    """Scrap out thumbnail data from <script> tags."""
-    ret_val = {}
-    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
-
-
-# [0, "-H96xjSoW5DsgM", ["https://encrypted-tbn0.gstatic.com/images?q...", 155, 324]
-# , ["https://assets.cdn.moviepilot.de/files/d3bf..", 576, 1200],
-_RE_JS_IMAGE_URL = re.compile(
-    r'"'
-    r'([^"]*)'  # -H96xjSoW5DsgM
-    r'",\s*\["'
-    r'https://[^\.]*\.gstatic.com/images[^"]*'  # https://encrypted-tbn0.gstatic.com/images?q...
-    r'[^\[]*\["'
-    r'(https?://[^"]*)'  # https://assets.cdn.moviepilot.de/files/d3bf...
-)
-
-
-def parse_urls_img_from_js(dom):
-
-    # There are two HTML script tags starting with a JS function
-    # 'AF_initDataCallback(...)'
-    #
-    # <script nonce="zscm+Ab/JzBk1Qd4GY6wGQ">
-    #   AF_initDataCallback({key: 'ds:0', hash: '1', data:[], sideChannel: {}});
-    # </script>
-    # <script nonce="zscm+Ab/JzBk1Qd4GY6wGQ">
-    #   AF_initDataCallback({key: 'ds:1', hash: '2', data:[null,[[["online_chips",[["the big",
-    #     ["https://encrypted-tbn0.gstatic.com/images?q...",null,null,true,[null,0],f
-    #   ...
-    # </script>
-    #
-    # The second script contains the URLs of the images.
-
-    # The AF_initDataCallback(..) is called with very large dictionary, that
-    # looks like JSON but it is not JSON since it contains JS variables and
-    # constants like 'null' (we can't use a JSON parser for).
-    #
-    # The alternative is to parse the entire <script> and find all image URLs by
-    # a regular expression.
-
-    img_src_script = eval_xpath_getindex(dom, '//script[contains(., "AF_initDataCallback({key: ")]', 1).text
-    data_id_to_img_url = {}
-    for data_id, url in _RE_JS_IMAGE_URL.findall(img_src_script):
-        data_id_to_img_url[data_id] = url
-    return data_id_to_img_url
-
-
-def get_img_url_by_data_id(data_id_to_img_url, img_node):
-    """Get full image URL by @data-id from parent element."""
-
-    data_id = eval_xpath_getindex(img_node, '../../../@data-id', 0)
-    img_url = data_id_to_img_url.get(data_id, '')
-    img_url = unquote(img_url.replace(r'\u00', r'%'))
-
-    return img_url
-
-
 def request(query, params):
-    """Google-Video search request"""
+    """Google-Image search request"""
 
     lang_info = get_lang_info(params, supported_languages, language_aliases, False)
 
@@ -132,7 +64,17 @@ def request(query, params):
         + lang_info['subdomain']
         + '/search'
         + "?"
-        + urlencode({'q': query, 'tbm': "isch", **lang_info['params'], 'ie': "utf8", 'oe': "utf8", 'num': 30})
+        + urlencode(
+            {
+                'q': query,
+                'tbm': "isch",
+                **lang_info['params'],
+                'ie': "utf8",
+                'oe': "utf8",
+                'asearch': 'isch',
+                'async': '_fmt:json,p:1,ijn:' + str(params['pageno']),
+            }
+        )
     )
 
     if params['time_range'] in time_range_dict:
@@ -141,9 +83,9 @@ def request(query, params):
         query_url += '&' + urlencode({'safe': filter_mapping[params['safesearch']]})
     params['url'] = query_url
 
-    params['cookies']['CONSENT'] = "YES+"
     params['headers'].update(lang_info['headers'])
-    params['headers']['Accept'] = 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8'
+    params['headers']['User-Agent'] = 'NSTN/3.60.474802233.release Dalvik/2.1.0 (Linux; U; Android 12; US) gzip'
+    params['headers']['Accept'] = '*/*'
     return params
 
 
@@ -153,76 +95,19 @@ def response(resp):
 
     detect_google_sorry(resp)
 
-    # convert the text to dom
-    dom = html.fromstring(resp.text)
-    img_bas64_map = scrap_out_thumbs(dom)
-    data_id_to_img_url = parse_urls_img_from_js(dom)
-
-    # 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, None)
-        if url is None:
-            logger.error("missing @href in node: %s", html.tostring(link_node))
-            continue
-
-        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])
-
-        src_url = get_img_url_by_data_id(data_id_to_img_url, img_node)
-        if not src_url:
-            src_url = thumbnail_src
+    response_2nd_line = resp.text.split("\n", 1)[1]
+    json_data = loads(response_2nd_line)["ischj"]
 
+    for item in json_data["metadata"]:
         results.append(
             {
-                'url': url,
-                'title': img_alt,
-                'content': pub_descr,
-                'source': pub_source,
-                'img_src': src_url,
-                'thumbnail_src': thumbnail_src,
+                'url': item["result"]["referrer_url"],
+                'title': item["result"]["page_title"],
+                'content': item["text_in_grid"]["snippet"],
+                'source': item["result"]["site_title"],
+                'format': f'{item["original_image"]["width"]} x item["original_image"]["height"]',
+                'img_src': item["original_image"]["url"],
+                'thumbnail_src': item["thumbnail"]["url"],
                 'template': 'images.html',
             }
         )