[fix] google: switch to using "Google App" for Android useragent (#5892)

I found a bypass using the Android Google App this time. However, unlike the iPhone GSA method, this one does have rate limits. Although it took a couple of hundred consecutive requests to trigger them.

searx/engines/google.py

@@ -69,7 +69,7 @@ filter_mapping = {0: "off", 1: "medium", 2: "high"}
 
 # Suggestions are links placed in a *card-section*, we extract only the text
 # from the links not the links itself.
-suggestion_xpath = '//div[contains(@class, "ouy7Mc")]//a'
+suggestion_xpath = '//div[contains(@class, "gGQDvd iIWm4b")]//a'
 
 
 _arcid_range = string.ascii_letters + string.digits + "_-"
@@ -269,6 +269,15 @@ def get_google_info(params: "OnlineParams", eng_traits: EngineTraits) -> dict[st
     ret_val["headers"]["Accept"] = "*/*"
     ret_val["headers"]["User-Agent"] = gen_gsa_useragent()
 
+    # Hardcoded default ENID Header required alongside the Android Google App
+    # User Agent
+    ret_val["headers"]["__Secure-ENID"] = (
+        "28.SE=II9FMkz92GewodDwKRBFsMISph7GsQs8JYLdXmAlprl6UcC02O2p7kfQlAWuwT"
+        "oygcrqHpmwQSH57b0c2kXfRfo35J8aV5FYSeUzYB67hqZQ2tZB7-o0hlTKwb5qMjn8Cf"
+        "w_AZ2s_6KIFMAl2goXGcXHSfgu4jwZOqShlHCcag0ppy_NnxJYWxpLkaeuGCICwWoIFJ"
+        "HP6Gy4BOkIEsl1N_k6F6jMF_OklE9qIubiyKkNaA"
+    )
+
     # Cookies
 
     # - https://github.com/searxng/searxng/pull/1679#issuecomment-1235432746
@@ -328,14 +337,14 @@ def request(query: str, params: "OnlineParams") -> None:
 
 
 # regex match to get image map that is found inside the returned javascript:
-# (function(){google.ldi={ ... };google.pim={ ... };google.sib=false;google ...
-RE_DATA_IMAGE = re.compile(r'"((?:dimg|pimg|tsuid)_[^"]*)":"((?:https?:)?//[^"]*)')
+# (function(){var s='...';var i=['...'] ...}
+RE_DATA_IMAGE = re.compile(r"(data:image[^']*?)'[^']*?'((?:dimg|pimg|tsuid)[^']*)")
 
 
 def parse_url_images(text: str):
     data_image_map = {}
 
-    for img_id, image_url in RE_DATA_IMAGE.findall(text):
+    for image_url, img_id in RE_DATA_IMAGE.findall(text):
         data_image_map[img_id] = image_url.encode('utf-8').decode("unicode-escape")
     logger.debug("data:image objects --> %s", list(data_image_map.keys()))
     return data_image_map
@@ -353,19 +362,18 @@ def response(resp: "SXNG_Response"):
     dom = html.fromstring(resp.text)
 
     # parse results
-
-    for result in eval_xpath_list(dom, './/div[contains(@class, "MjjYud")]'):
+    for result in eval_xpath_list(dom, '//a[@data-ved and not(@class)]'):
         # pylint: disable=too-many-nested-blocks
 
         try:
-            title_tag = eval_xpath_getindex(result, './/div[contains(@role, "link")]', 0, default=None)
+            title_tag = eval_xpath_getindex(result, './/div[@style]', 0, default=None)
             if title_tag is None:
                 # this not one of the common google results *section*
                 logger.debug("ignoring item from the result_xpath list: missing title")
                 continue
             title = extract_text(title_tag)
 
-            raw_url = eval_xpath_getindex(result, ".//a/@href", 0, None)
+            raw_url = result.get("href")
             if raw_url is None:
                 logger.debug(
                     'ignoring item from the result_xpath list: missing url of title "%s"',
@@ -378,15 +386,15 @@ def response(resp: "SXNG_Response"):
             else:
                 url = raw_url
 
-            content_nodes = eval_xpath(result, './/div[contains(@data-sncf, "1")]')
+            content_nodes = eval_xpath(result, '../..//div[contains(@class, "ilUpNd H66NU aSRlid")]')
             for item in content_nodes:
                 for script in item.xpath(".//script"):
                     script.getparent().remove(script)
 
-            content = extract_text(content_nodes)
+            content = extract_text(content_nodes[0])
 
             # Images that are NOT the favicon
-            xpath_image = eval_xpath_getindex(result, './/img[not(@class="XNo5Ab")]', index=0, default=None)
+            xpath_image = eval_xpath_getindex(result, './/img', index=0, default=None)
 
             thumbnail = None
             if xpath_image is not None:

searx/utils.py

@@ -13,7 +13,7 @@ from collections.abc import MutableMapping, Callable
 
 from numbers import Number
 from os.path import splitext, join
-from random import choice
+from random import choice, randint
 from html.parser import HTMLParser
 from html import escape
 from urllib.parse import urljoin, urlparse, parse_qs, urlencode
@@ -82,11 +82,11 @@ def gen_useragent(os_string: str | None = None) -> str:
 
 
 def gen_gsa_useragent() -> str:
-    """Return a random GSA User Agent suitable for Google
+    """Return a random "Android Google App" User Agent suitable for Google
 
     See searx/data/gsa_useragents.txt
     """
-    return choice(gsa_useragents_loader())
+    return choice(gsa_useragents_loader()) + " GoogleApp/" + str(randint(0, 9))
 
 
 class HTMLTextExtractor(HTMLParser):

searxng_extra/update/update_gsa_useragents.py

@@ -26,7 +26,7 @@ def fetch_gsa_useragents() -> list[str]:
 
     suas: set[str] = set()
     for ua in loads(decompress(response.content)):
-        if ua["platform"] == "iPhone" and "GSA" in ua["userAgent"]:
+        if "Android" in ua["userAgent"] and "Chrome" in ua["userAgent"] and "Samsung" not in ua["userAgent"]:
             suas.add(ua["userAgent"])
 
     luas = list(suas)