Merge e4962161f6 into 06c1a8cdff

yt_dlp/extractor/common.py

@@ -30,7 +30,7 @@
 from ..downloader.f4m import get_base_url, remove_encrypted_media
 from ..downloader.hls import HlsFD
 from ..globals import plugin_ies_overrides
-from ..networking import HEADRequest, Request
+from ..networking import HEADRequest, Request, Response
 from ..networking.exceptions import (
     HTTPError,
     IncompleteRead,
@@ -102,6 +102,7 @@
 )
 from ..utils._utils import _request_dump_filename
 from ..utils.jslib import devalue
+from ..utils.networking import HTTPHeaderDict
 
 
 class InfoExtractor:
@@ -571,6 +572,7 @@ class InfoExtractor:
     _ready = False
     _downloader = None
     _x_forwarded_for_ip = None
+    _latest_firefox_user_agent = None
     _GEO_BYPASS = True
     _GEO_COUNTRIES = None
     _GEO_IP_BLOCKS = None
@@ -1202,6 +1204,52 @@ def _download_webpage(
                     raise e
                 self._sleep(timeout, video_id)
 
+    def _get_latest_firefox_user_agent(self, fatal=False):
+        if InfoExtractor._latest_firefox_user_agent:
+            return InfoExtractor._latest_firefox_user_agent
+
+        USER_AGENT_TMPL = 'Mozilla/5.0 (Windows NT 10.0; rv:{0}.0) Gecko/20100101 Firefox/{0}.0'
+        DEFAULT_VERSION = '140'  # If not fatal, default to latest major version as of 2025.06.24
+        ff_version = None
+
+        # Ref: https://ftp.mozilla.org/pub/firefox/releases/latest/README.txt
+        urlh = self._request_webpage(
+            HEADRequest('https://download.mozilla.org/'), None,
+            'Fetching latest Firefox version number', 'Unable to fetch latest Firefox version number',
+            fatal=fatal, query={'product': 'firefox-latest', 'os': 'linux64', 'lang': 'en-US'})
+        if isinstance(urlh, Response):
+            ff_version = self._search_regex(
+                r'/releases/(\d{3})', urlh.url, 'latest Firefox version number', fatal=fatal)
+
+        if ff_version:
+            InfoExtractor._latest_firefox_user_agent = USER_AGENT_TMPL.format(ff_version)
+            return InfoExtractor._latest_firefox_user_agent
+
+        self.write_debug(f'Using default Firefox {DEFAULT_VERSION} user-agent instead of latest')
+        return USER_AGENT_TMPL.format(DEFAULT_VERSION)
+
+    def _download_firefox_webpage(self, url, video_id, *args, **kwargs):
+        impersonate = kwargs.pop('impersonate', None)
+        require_impersonation = kwargs.pop('require_impersonation', False)
+        headers = HTTPHeaderDict(kwargs.pop('headers', None))
+        headers.update({'User-Agent': self._get_latest_firefox_user_agent()})
+        kwargs.update({'headers': headers})
+
+        try:
+            return self._download_webpage(url, video_id, *args, **kwargs)
+        except ExtractorError as e:
+            if not isinstance(e.cause, HTTPError) or e.cause.status != 403:
+                raise
+            self.write_debug(f'{video_id}: Got HTTP Error 403, retrying with impersonation')
+
+        # Retry with impersonation if user-agent alone is insufficient
+        headers.pop('User-Agent')
+        kwargs.update({
+            'impersonate': impersonate if impersonate is not None else 'firefox',
+            'require_impersonation': require_impersonation,
+        })
+        return self._download_webpage(url, video_id, *args, **kwargs)
+
     def report_warning(self, msg, video_id=None, *args, only_once=False, **kwargs):
         idstr = format_field(video_id, None, '%s: ')
         msg = f'[{self.IE_NAME}] {idstr}{msg}'

yt_dlp/extractor/francaisfacile.py

@@ -1,9 +1,7 @@
 import urllib.parse
 
 from .common import InfoExtractor
-from ..networking.exceptions import HTTPError
 from ..utils import (
-    ExtractorError,
     float_or_none,
     url_or_none,
 )
@@ -58,16 +56,8 @@ class FrancaisFacileIE(InfoExtractor):
 
     def _real_extract(self, url):
         display_id = urllib.parse.unquote(self._match_id(url))
-
-        try:  # yt-dlp's default user-agents are too old and blocked by the site
-            webpage = self._download_webpage(url, display_id, headers={
-                'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; rv:136.0) Gecko/20100101 Firefox/136.0',
-            })
-        except ExtractorError as e:
-            if not isinstance(e.cause, HTTPError) or e.cause.status != 403:
-                raise
-            # Retry with impersonation if hardcoded UA is insufficient
-            webpage = self._download_webpage(url, display_id, impersonate=True)
+        # yt-dlp's default Chrome user-agents are too old and blocked by the website
+        webpage = self._download_firefox_webpage(url, display_id, impersonate=True)
 
         data = self._search_json(
             r'<script[^>]+\bdata-media-id=[^>]+\btype="application/json"[^>]*>',

yt_dlp/extractor/mitele.py

@@ -79,7 +79,8 @@ class MiTeleIE(TelecincoBaseIE):
 
     def _real_extract(self, url):
         display_id = self._match_id(url)
-        webpage = self._download_akamai_webpage(url, display_id)
+        # yt-dlp's default Chrome user-agents are too old and blocked by akamai
+        webpage = self._download_firefox_webpage(url, display_id, impersonate=True)
         pre_player = self._search_json(
             r'window\.\$REACTBASE_STATE\.prePlayer_mtweb\s*=',
             webpage, 'Pre Player', display_id)['prePlayer']

yt_dlp/extractor/sproutvideo.py

@@ -98,11 +98,8 @@ def _extract_embed_urls(cls, url, webpage):
     def _real_extract(self, url):
         url, smuggled_data = unsmuggle_url(url, {})
         video_id = self._match_id(url)
-        webpage = self._download_webpage(url, video_id, headers={
-            **traverse_obj(smuggled_data, {'Referer': 'referer'}),
-            # yt-dlp's default Chrome user-agents are too old
-            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; rv:140.0) Gecko/20100101 Firefox/140.0',
-        })
+        webpage = self._download_firefox_webpage(
+            url, video_id, headers=traverse_obj(smuggled_data, {'Referer': 'referer'}))
         data = self._search_json(
             r'var\s+(?:dat|playerInfo)\s*=\s*["\']', webpage, 'player info', video_id,
             contains_pattern=r'[A-Za-z0-9+/=]+', end_pattern=r'["\'];',

yt_dlp/extractor/telecinco.py

@@ -63,17 +63,6 @@ def _parse_content(self, content, url):
             'http_headers': headers,
         }
 
-    def _download_akamai_webpage(self, url, display_id):
-        try:  # yt-dlp's default user-agents are too old and blocked by akamai
-            return self._download_webpage(url, display_id, headers={
-                'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; rv:136.0) Gecko/20100101 Firefox/136.0',
-            })
-        except ExtractorError as e:
-            if not isinstance(e.cause, HTTPError) or e.cause.status != 403:
-                raise
-            # Retry with impersonation if hardcoded UA is insufficient to bypass akamai
-            return self._download_webpage(url, display_id, impersonate=True)
-
 
 class TelecincoIE(TelecincoBaseIE):
     IE_DESC = 'telecinco.es, cuatro.com and mediaset.es'
@@ -151,7 +140,8 @@ class TelecincoIE(TelecincoBaseIE):
 
     def _real_extract(self, url):
         display_id = self._match_id(url)
-        webpage = self._download_akamai_webpage(url, display_id)
+        # yt-dlp's default Chrome user-agents are too old and blocked by akamai
+        webpage = self._download_firefox_webpage(url, display_id, impersonate=True)
         article = self._search_json(
             r'window\.\$REACTBASE_STATE\.article(?:_multisite)?\s*=',
             webpage, 'article', display_id)['article']