[compat] Fix old Pythons broken loading of valueless cookie attributes

Cookie string parsing in Py 2.6.9, probably earlier, requires `=`.
Also 3.2, though the CPython code appears to be OK: 3.1 was also wrong.

.github/workflows/ci.yml

@@ -301,7 +301,7 @@ jobs:
       if: ${{ matrix.python-version == '2.6' }}
       shell: bash
       run: |
-        # see pip for Jython
+        # Work around deprecation of support for non-SNI clients at PyPI CDN (see https://status.python.org/incidents/hzmjhqsdjqgb)
         $PIP -qq show unittest2 || { \
           for u in "65/26/32b8464df2a97e6dd1b656ed26b2c194606c16fe163c695a992b36c11cdf/six-1.13.0-py2.py3-none-any.whl" \
               "f2/94/3af39d34be01a24a6e65433d19e107099374224905f1e0cc6bbe1fd22a2f/argparse-1.4.0-py2.py3-none-any.whl" \
@@ -312,7 +312,7 @@ jobs:
             $PIP install ${u##*/}; \
           done; }
         # make tests use unittest2
-        for test in ./test/test_*.py; do
+        for test in ./test/test_*.py ./test/helper.py; do
           sed -r -i -e '/^import unittest$/s/test/test2 as unittest/' "$test"
         done
     #-------- nose --------

test/helper.py

@@ -9,6 +9,7 @@ import re
 import types
 import ssl
 import sys
+import unittest
 
 import youtube_dl.extractor
 from youtube_dl import YoutubeDL
@@ -17,6 +18,7 @@ from youtube_dl.compat import (
     compat_str,
 )
 from youtube_dl.utils import (
+    IDENTITY,
     preferredencoding,
     write_string,
 )
@@ -72,7 +74,8 @@ class FakeYDL(YoutubeDL):
     def to_screen(self, s, skip_eol=None):
         print(s)
 
-    def trouble(self, s, tb=None):
+    def trouble(self, *args, **kwargs):
+        s = args[0] if len(args) > 0 else kwargs.get('message', 'Missing message')
         raise Exception(s)
 
     def download(self, x):
@@ -297,3 +300,7 @@ def http_server_port(httpd):
     else:
         sock = httpd.socket
     return sock.getsockname()[1]
+
+
+def expectedFailureIf(cond):
+    return unittest.expectedFailure if cond else IDENTITY

test/test_YoutubeDL.py

@@ -10,14 +10,30 @@ import unittest
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
 import copy
+import json
 
-from test.helper import FakeYDL, assertRegexpMatches
+from test.helper import (
+    FakeYDL,
+    assertRegexpMatches,
+    try_rm,
+)
 from youtube_dl import YoutubeDL
-from youtube_dl.compat import compat_str, compat_urllib_error
+from youtube_dl.compat import (
+    compat_http_cookiejar_Cookie,
+    compat_http_cookies_SimpleCookie,
+    compat_kwargs,
+    compat_str,
+    compat_urllib_error,
+)
+
 from youtube_dl.extractor import YoutubeIE
 from youtube_dl.extractor.common import InfoExtractor
 from youtube_dl.postprocessor.common import PostProcessor
-from youtube_dl.utils import ExtractorError, match_filter_func
+from youtube_dl.utils import (
+    ExtractorError,
+    match_filter_func,
+    traverse_obj,
+)
 
 TEST_URL = 'http://localhost/sample.mp4'
 
@@ -29,11 +45,14 @@ class YDL(FakeYDL):
         self.msgs = []
 
     def process_info(self, info_dict):
-        self.downloaded_info_dicts.append(info_dict)
+        self.downloaded_info_dicts.append(info_dict.copy())
 
     def to_screen(self, msg):
         self.msgs.append(msg)
 
+    def dl(self, *args, **kwargs):
+        assert False, 'Downloader must not be invoked for test_YoutubeDL'
+
 
 def _make_result(formats, **kwargs):
     res = {
@@ -42,8 +61,9 @@ def _make_result(formats, **kwargs):
         'title': 'testttitle',
         'extractor': 'testex',
         'extractor_key': 'TestEx',
+        'webpage_url': 'http://example.com/watch?v=shenanigans',
     }
-    res.update(**kwargs)
+    res.update(**compat_kwargs(kwargs))
     return res
 
 
@@ -930,17 +950,11 @@ class TestYoutubeDL(unittest.TestCase):
     # Test case for https://github.com/ytdl-org/youtube-dl/issues/27064
     def test_ignoreerrors_for_playlist_with_url_transparent_iterable_entries(self):
 
-        class _YDL(YDL):
-            def __init__(self, *args, **kwargs):
-                super(_YDL, self).__init__(*args, **kwargs)
-
-            def trouble(self, s, tb=None):
-                pass
-
-        ydl = _YDL({
+        ydl = YDL({
             'format': 'extra',
             'ignoreerrors': True,
         })
+        ydl.trouble = lambda *_, **__: None
 
         class VideoIE(InfoExtractor):
             _VALID_URL = r'video:(?P<id>\d+)'
@@ -1017,5 +1031,160 @@ class TestYoutubeDL(unittest.TestCase):
         self.assertEqual(out_info['release_date'], '20210930')
 
 
+class TestYoutubeDLCookies(unittest.TestCase):
+
+    @staticmethod
+    def encode_cookie(cookie):
+        if not isinstance(cookie, dict):
+            cookie = vars(cookie)
+        for name, value in cookie.items():
+            yield name, compat_str(value)
+
+    @classmethod
+    def comparable_cookies(cls, cookies):
+        # Work around cookiejar cookies not being unicode strings
+        return sorted(map(tuple, map(sorted, map(cls.encode_cookie, cookies))))
+
+    def assertSameCookies(self, c1, c2, msg=None):
+        return self.assertEqual(
+            *map(self.comparable_cookies, (c1, c2)),
+            msg=msg)
+
+    def assertSameCookieStrings(self, c1, c2, msg=None):
+        return self.assertSameCookies(
+            *map(lambda c: compat_http_cookies_SimpleCookie(c).values(), (c1, c2)),
+            msg=msg)
+
+    def test_header_cookies(self):
+
+        ydl = FakeYDL()
+        ydl.report_warning = lambda *_, **__: None
+
+        def cookie(name, value, version=None, domain='', path='', secure=False, expires=None):
+            return compat_http_cookiejar_Cookie(
+                version or 0, name, value, None, False,
+                domain, bool(domain), bool(domain), path, bool(path),
+                secure, expires, False, None, None, rest={})
+
+        test_url, test_domain = (t % ('yt.dl',) for t in ('https://%s/test', '.%s'))
+
+        def test(encoded_cookies, cookies, headers=False, round_trip=None, error_re=None):
+            def _test():
+                ydl.cookiejar.clear()
+                ydl._load_cookies(encoded_cookies, autoscope=headers)
+                if headers:
+                    ydl._apply_header_cookies(test_url)
+                data = {'url': test_url}
+                ydl._calc_headers(data)
+                self.assertSameCookies(
+                    cookies, ydl.cookiejar,
+                    'Extracted cookiejar.Cookie is not the same')
+                if not headers:
+                    self.assertSameCookieStrings(
+                        data.get('cookies'), round_trip or encoded_cookies,
+                        msg='Cookie is not the same as round trip')
+                ydl.__dict__['_YoutubeDL__header_cookies'] = []
+
+            try:
+                _test()
+            except AssertionError:
+                raise
+            except Exception as e:
+                if not error_re:
+                    raise
+                assertRegexpMatches(self, e.args[0], error_re.join(('.*',) * 2))
+
+        test('test=value; Domain=' + test_domain, [cookie('test', 'value', domain=test_domain)])
+        test('test=value', [cookie('test', 'value')], error_re='Unscoped cookies are not allowed')
+        test('cookie1=value1; Domain={0}; Path=/test; cookie2=value2; Domain={0}; Path=/'.format(test_domain), [
+            cookie('cookie1', 'value1', domain=test_domain, path='/test'),
+            cookie('cookie2', 'value2', domain=test_domain, path='/')])
+        cookie_kw = compat_kwargs(
+            {'domain': test_domain, 'path': '/test', 'secure': True, 'expires': '9999999999', })
+        test('test=value; Domain={domain}; Path={path}; Secure; Expires={expires}'.format(**cookie_kw), [
+            cookie('test', 'value', **cookie_kw)])
+        test('test="value; "; path=/test; domain=' + test_domain, [
+            cookie('test', 'value; ', domain=test_domain, path='/test')],
+            round_trip='test="value\\073 "; Domain={0}; Path=/test'.format(test_domain))
+        test('name=; Domain=' + test_domain, [cookie('name', '', domain=test_domain)],
+             round_trip='name=""; Domain=' + test_domain)
+        test('test=value', [cookie('test', 'value', domain=test_domain)], headers=True)
+        test('cookie1=value; Domain={0}; cookie2=value'.format(test_domain), [],
+             headers=True, error_re='Invalid syntax')
+        ydl.report_warning = ydl.report_error
+        test('test=value', [], headers=True, error_re='Passing cookies as a header is a potential security risk')
+
+    def test_infojson_cookies(self):
+        TEST_FILE = 'test_infojson_cookies.info.json'
+        TEST_URL = 'https://example.com/example.mp4'
+        COOKIES = 'a=b; Domain=.example.com; c=d; Domain=.example.com'
+        COOKIE_HEADER = {'Cookie': 'a=b; c=d'}
+
+        ydl = FakeYDL()
+        ydl.process_info = lambda x: ydl._write_info_json('test', x, TEST_FILE)
+
+        def make_info(info_header_cookies=False, fmts_header_cookies=False, cookies_field=False):
+            fmt = {'url': TEST_URL}
+            if fmts_header_cookies:
+                fmt['http_headers'] = COOKIE_HEADER
+            if cookies_field:
+                fmt['cookies'] = COOKIES
+            return _make_result([fmt], http_headers=COOKIE_HEADER if info_header_cookies else None)
+
+        def test(initial_info, note):
+
+            def failure_msg(why):
+                return ' when '.join((why, note))
+
+            result = {}
+            result['processed'] = ydl.process_ie_result(initial_info)
+            self.assertTrue(ydl.cookiejar.get_cookies_for_url(TEST_URL),
+                            msg=failure_msg('No cookies set in cookiejar after initial process'))
+            ydl.cookiejar.clear()
+            with open(TEST_FILE) as infojson:
+                result['loaded'] = ydl.sanitize_info(json.load(infojson), True)
+            result['final'] = ydl.process_ie_result(result['loaded'].copy(), download=False)
+            self.assertTrue(ydl.cookiejar.get_cookies_for_url(TEST_URL),
+                            msg=failure_msg('No cookies set in cookiejar after final process'))
+            ydl.cookiejar.clear()
+            for key in ('processed', 'loaded', 'final'):
+                info = result[key]
+                self.assertIsNone(
+                    traverse_obj(info, ((None, ('formats', 0)), 'http_headers', 'Cookie'), casesense=False, get_all=False),
+                    msg=failure_msg('Cookie header not removed in {0} result'.format(key)))
+                self.assertSameCookieStrings(
+                    traverse_obj(info, ((None, ('formats', 0)), 'cookies'), get_all=False), COOKIES,
+                    msg=failure_msg('No cookies field found in {0} result'.format(key)))
+
+        test({'url': TEST_URL, 'http_headers': COOKIE_HEADER, 'id': '1', 'title': 'x'}, 'no formats field')
+        test(make_info(info_header_cookies=True), 'info_dict header cokies')
+        test(make_info(fmts_header_cookies=True), 'format header cookies')
+        test(make_info(info_header_cookies=True, fmts_header_cookies=True), 'info_dict and format header cookies')
+        test(make_info(info_header_cookies=True, fmts_header_cookies=True, cookies_field=True), 'all cookies fields')
+        test(make_info(cookies_field=True), 'cookies format field')
+        test({'url': TEST_URL, 'cookies': COOKIES, 'id': '1', 'title': 'x'}, 'info_dict cookies field only')
+
+        try_rm(TEST_FILE)
+
+    def test_add_headers_cookie(self):
+        def check_for_cookie_header(result):
+            return traverse_obj(result, ((None, ('formats', 0)), 'http_headers', 'Cookie'), casesense=False, get_all=False)
+
+        ydl = FakeYDL({'http_headers': {'Cookie': 'a=b'}})
+        ydl._apply_header_cookies(_make_result([])['webpage_url'])  # Scope to input webpage URL: .example.com
+
+        fmt = {'url': 'https://example.com/video.mp4'}
+        result = ydl.process_ie_result(_make_result([fmt]), download=False)
+        self.assertIsNone(check_for_cookie_header(result), msg='http_headers cookies in result info_dict')
+        self.assertEqual(result.get('cookies'), 'a=b; Domain=.example.com', msg='No cookies were set in cookies field')
+        self.assertIn('a=b', ydl.cookiejar.get_cookie_header(fmt['url']), msg='No cookies were set in cookiejar')
+
+        fmt = {'url': 'https://wrong.com/video.mp4'}
+        result = ydl.process_ie_result(_make_result([fmt]), download=False)
+        self.assertIsNone(check_for_cookie_header(result), msg='http_headers cookies for wrong domain')
+        self.assertFalse(result.get('cookies'), msg='Cookies set in cookies field for wrong domain')
+        self.assertFalse(ydl.cookiejar.get_cookie_header(fmt['url']), msg='Cookies set in cookiejar for wrong domain')
+
+
 if __name__ == '__main__':
     unittest.main()

test/test_YoutubeDLCookieJar.py

@@ -46,6 +46,20 @@ class TestYoutubeDLCookieJar(unittest.TestCase):
         # will be ignored
         self.assertFalse(cookiejar._cookies)
 
+    def test_get_cookie_header(self):
+        cookiejar = YoutubeDLCookieJar('./test/testdata/cookies/httponly_cookies.txt')
+        cookiejar.load(ignore_discard=True, ignore_expires=True)
+        header = cookiejar.get_cookie_header('https://www.foobar.foobar')
+        self.assertIn('HTTPONLY_COOKIE', header)
+
+    def test_get_cookies_for_url(self):
+        cookiejar = YoutubeDLCookieJar('./test/testdata/cookies/session_cookies.txt')
+        cookiejar.load(ignore_discard=True, ignore_expires=True)
+        cookies = cookiejar.get_cookies_for_url('https://www.foobar.foobar/')
+        self.assertEqual(len(cookies), 2)
+        cookies = cookiejar.get_cookies_for_url('https://foobar.foobar/')
+        self.assertFalse(cookies)
+
 
 if __name__ == '__main__':
     unittest.main()

test/test_downloader_external.py

@@ -12,20 +12,65 @@ sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
 from test.helper import (
     FakeLogger,
+    FakeYDL,
     http_server_port,
     try_rm,
 )
 from youtube_dl import YoutubeDL
-from youtube_dl.compat import compat_http_server
-from youtube_dl.utils import encodeFilename
-from youtube_dl.downloader.external import Aria2pFD
+from youtube_dl.compat import (
+    compat_http_cookiejar_Cookie,
+    compat_http_server,
+    compat_kwargs,
+)
+from youtube_dl.utils import (
+    encodeFilename,
+    join_nonempty,
+)
+from youtube_dl.downloader.external import (
+    Aria2cFD,
+    Aria2pFD,
+    AxelFD,
+    CurlFD,
+    FFmpegFD,
+    HttpieFD,
+    WgetFD,
+)
 import threading
 
-TEST_DIR = os.path.dirname(os.path.abspath(__file__))
-
-
 TEST_SIZE = 10 * 1024
 
+TEST_COOKIE = {
+    'version': 0,
+    'name': 'test',
+    'value': 'ytdlp',
+    'port': None,
+    'port_specified': False,
+    'domain': '.example.com',
+    'domain_specified': True,
+    'domain_initial_dot': False,
+    'path': '/',
+    'path_specified': True,
+    'secure': False,
+    'expires': None,
+    'discard': False,
+    'comment': None,
+    'comment_url': None,
+    'rest': {},
+}
+
+TEST_COOKIE_VALUE = join_nonempty('name', 'value', delim='=', from_dict=TEST_COOKIE)
+
+TEST_INFO = {'url': 'http://www.example.com/'}
+
+
+def cookiejar_Cookie(**cookie_args):
+    return compat_http_cookiejar_Cookie(**compat_kwargs(cookie_args))
+
+
+def ifExternalFDAvailable(externalFD):
+    return unittest.skipUnless(externalFD.available(),
+                               externalFD.get_basename() + ' not found')
+
 
 class HTTPTestRequestHandler(compat_http_server.BaseHTTPRequestHandler):
     def log_message(self, format, *args):
@@ -70,7 +115,7 @@ class HTTPTestRequestHandler(compat_http_server.BaseHTTPRequestHandler):
             assert False, 'unrecognised server path'
 
 
-@unittest.skipUnless(Aria2pFD.available(), 'aria2p module not found')
+@ifExternalFDAvailable(Aria2pFD)
 class TestAria2pFD(unittest.TestCase):
     def setUp(self):
         self.httpd = compat_http_server.HTTPServer(
@@ -111,5 +156,103 @@ class TestAria2pFD(unittest.TestCase):
         })
 
 
+@ifExternalFDAvailable(HttpieFD)
+class TestHttpieFD(unittest.TestCase):
+    def test_make_cmd(self):
+        with FakeYDL() as ydl:
+            downloader = HttpieFD(ydl, {})
+            self.assertEqual(
+                downloader._make_cmd('test', TEST_INFO),
+                ['http', '--download', '--output', 'test', 'http://www.example.com/'])
+
+            # Test cookie header is added
+            ydl.cookiejar.set_cookie(cookiejar_Cookie(**TEST_COOKIE))
+            self.assertEqual(
+                downloader._make_cmd('test', TEST_INFO),
+                ['http', '--download', '--output', 'test',
+                 'http://www.example.com/', 'Cookie:' + TEST_COOKIE_VALUE])
+
+
+@ifExternalFDAvailable(AxelFD)
+class TestAxelFD(unittest.TestCase):
+    def test_make_cmd(self):
+        with FakeYDL() as ydl:
+            downloader = AxelFD(ydl, {})
+            self.assertEqual(
+                downloader._make_cmd('test', TEST_INFO),
+                ['axel', '-o', 'test', '--', 'http://www.example.com/'])
+
+            # Test cookie header is added
+            ydl.cookiejar.set_cookie(cookiejar_Cookie(**TEST_COOKIE))
+            self.assertEqual(
+                downloader._make_cmd('test', TEST_INFO),
+                ['axel', '-o', 'test', '-H', 'Cookie: ' + TEST_COOKIE_VALUE,
+                 '--max-redirect=0', '--', 'http://www.example.com/'])
+
+
+@ifExternalFDAvailable(WgetFD)
+class TestWgetFD(unittest.TestCase):
+    def test_make_cmd(self):
+        with FakeYDL() as ydl:
+            downloader = WgetFD(ydl, {})
+            self.assertNotIn('--load-cookies', downloader._make_cmd('test', TEST_INFO))
+            # Test cookiejar tempfile arg is added
+            ydl.cookiejar.set_cookie(cookiejar_Cookie(**TEST_COOKIE))
+            self.assertIn('--load-cookies', downloader._make_cmd('test', TEST_INFO))
+
+
+@ifExternalFDAvailable(CurlFD)
+class TestCurlFD(unittest.TestCase):
+    def test_make_cmd(self):
+        with FakeYDL() as ydl:
+            downloader = CurlFD(ydl, {})
+            self.assertNotIn('--cookie', downloader._make_cmd('test', TEST_INFO))
+            # Test cookie header is added
+            ydl.cookiejar.set_cookie(cookiejar_Cookie(**TEST_COOKIE))
+            self.assertIn('--cookie', downloader._make_cmd('test', TEST_INFO))
+            self.assertIn(TEST_COOKIE_VALUE, downloader._make_cmd('test', TEST_INFO))
+
+
+@ifExternalFDAvailable(Aria2cFD)
+class TestAria2cFD(unittest.TestCase):
+    def test_make_cmd(self):
+        with FakeYDL() as ydl:
+            downloader = Aria2cFD(ydl, {})
+            downloader._make_cmd('test', TEST_INFO)
+            self.assertFalse(hasattr(downloader, '_cookies_tempfile'))
+
+            # Test cookiejar tempfile arg is added
+            ydl.cookiejar.set_cookie(cookiejar_Cookie(**TEST_COOKIE))
+            cmd = downloader._make_cmd('test', TEST_INFO)
+            self.assertIn('--load-cookies=%s' % downloader._cookies_tempfile, cmd)
+
+
+@ifExternalFDAvailable(FFmpegFD)
+class TestFFmpegFD(unittest.TestCase):
+    _args = []
+
+    def _test_cmd(self, args):
+        self._args = args
+
+    def test_make_cmd(self):
+        with FakeYDL() as ydl:
+            downloader = FFmpegFD(ydl, {})
+            downloader._debug_cmd = self._test_cmd
+            info_dict = TEST_INFO.copy()
+            info_dict['ext'] = 'mp4'
+
+            downloader._call_downloader('test', info_dict)
+            self.assertEqual(self._args, [
+                'ffmpeg', '-y', '-i', 'http://www.example.com/',
+                '-c', 'copy', '-f', 'mp4', 'file:test'])
+
+            # Test cookies arg is added
+            ydl.cookiejar.set_cookie(cookiejar_Cookie(**TEST_COOKIE))
+            downloader._call_downloader('test', info_dict)
+            self.assertEqual(self._args, [
+                'ffmpeg', '-y', '-cookies', TEST_COOKIE_VALUE + '; path=/; domain=.example.com;\r\n',
+                '-i', 'http://www.example.com/', '-c', 'copy', '-f', 'mp4', 'file:test'])
+
+
 if __name__ == '__main__':
     unittest.main()

test/test_execution.py

@@ -24,21 +24,24 @@ except AttributeError:
 
 
 class TestExecution(unittest.TestCase):
+    def setUp(self):
+        self.module = 'youtube_dl'
+        if sys.version_info < (2, 7):
+            self.module += '.__main__'
+
     def test_import(self):
         subprocess.check_call([sys.executable, '-c', 'import youtube_dl'], cwd=rootDir)
 
-    @unittest.skipIf(sys.version_info < (2, 7), 'Python 2.6 doesn\'t support package execution')
     def test_module_exec(self):
-        subprocess.check_call([sys.executable, '-m', 'youtube_dl', '--version'], cwd=rootDir, stdout=_DEV_NULL)
+        subprocess.check_call([sys.executable, '-m', self.module, '--version'], cwd=rootDir, stdout=_DEV_NULL)
 
     def test_main_exec(self):
         subprocess.check_call([sys.executable, os.path.normpath('youtube_dl/__main__.py'), '--version'], cwd=rootDir, stdout=_DEV_NULL)
 
-    @unittest.skipIf(sys.version_info < (2, 7), 'Python 2.6 doesn\'t support package execution')
     def test_cmdline_umlauts(self):
         os.environ['PYTHONIOENCODING'] = 'utf-8'
         p = subprocess.Popen(
-            [sys.executable, os.path.normpath('youtube_dl/__main__.py'), encodeArgument('ä'), '--version'],
+            [sys.executable, '-m', self.module, encodeArgument('ä'), '--version'],
             cwd=rootDir, stdout=_DEV_NULL, stderr=subprocess.PIPE)
         _, stderr = p.communicate()
         self.assertFalse(stderr)

test/test_http.py

@@ -8,33 +8,161 @@ import sys
 import unittest
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
+import contextlib
+import gzip
+import io
+import ssl
+import tempfile
+import threading
+import zlib
+
+# avoid deprecated alias assertRaisesRegexp
+if hasattr(unittest.TestCase, 'assertRaisesRegex'):
+    unittest.TestCase.assertRaisesRegexp = unittest.TestCase.assertRaisesRegex
+
+try:
+    import brotli
+except ImportError:
+    brotli = None
+try:
+    from urllib.request import pathname2url
+except ImportError:
+    from urllib import pathname2url
+
+from youtube_dl.compat import (
+    compat_http_cookiejar_Cookie,
+    compat_http_server,
+    compat_str as str,
+    compat_urllib_error,
+    compat_urllib_HTTPError,
+    compat_urllib_parse,
+    compat_urllib_request,
+)
+
+from youtube_dl.utils import (
+    sanitized_Request,
+    urlencode_postdata,
+)
+
 from test.helper import (
+    FakeYDL,
     FakeLogger,
     http_server_port,
 )
 from youtube_dl import YoutubeDL
-from youtube_dl.compat import compat_http_server, compat_urllib_request
-import ssl
-import threading
 
 TEST_DIR = os.path.dirname(os.path.abspath(__file__))
 
 
 class HTTPTestRequestHandler(compat_http_server.BaseHTTPRequestHandler):
+    protocol_version = 'HTTP/1.1'
+
+    # work-around old/new -style class inheritance
+    def super(self, meth_name, *args, **kwargs):
+        from types import MethodType
+        try:
+            super()
+            fn = lambda s, m, *a, **k: getattr(super(), m)(*a, **k)
+        except TypeError:
+            fn = lambda s, m, *a, **k: getattr(compat_http_server.BaseHTTPRequestHandler, m)(s, *a, **k)
+        self.super = MethodType(fn, self)
+        return self.super(meth_name, *args, **kwargs)
+
     def log_message(self, format, *args):
         pass
 
-    def do_GET(self):
-        if self.path == '/video.html':
+    def _headers(self):
+        payload = str(self.headers).encode('utf-8')
         self.send_response(200)
+        self.send_header('Content-Type', 'application/json')
+        self.send_header('Content-Length', str(len(payload)))
+        self.end_headers()
+        self.wfile.write(payload)
+
+    def _redirect(self):
+        self.send_response(int(self.path[len('/redirect_'):]))
+        self.send_header('Location', '/method')
+        self.send_header('Content-Length', '0')
+        self.end_headers()
+
+    def _method(self, method, payload=None):
+        self.send_response(200)
+        self.send_header('Content-Length', str(len(payload or '')))
+        self.send_header('Method', method)
+        self.end_headers()
+        if payload:
+            self.wfile.write(payload)
+
+    def _status(self, status):
+        payload = '<html>{0} NOT FOUND</html>'.format(status).encode('utf-8')
+        self.send_response(int(status))
         self.send_header('Content-Type', 'text/html; charset=utf-8')
+        self.send_header('Content-Length', str(len(payload)))
         self.end_headers()
-            self.wfile.write(b'<html><video src="/vid.mp4" /></html>')
+        self.wfile.write(payload)
+
+    def _read_data(self):
+        if 'Content-Length' in self.headers:
+            return self.rfile.read(int(self.headers['Content-Length']))
+
+    def _test_url(self, path, host='127.0.0.1', scheme='http', port=None):
+        return '{0}://{1}:{2}/{3}'.format(
+            scheme, host,
+            port if port is not None
+            else http_server_port(self.server), path)
+
+    def do_POST(self):
+        data = self._read_data()
+        if self.path.startswith('/redirect_'):
+            self._redirect()
+        elif self.path.startswith('/method'):
+            self._method('POST', data)
+        elif self.path.startswith('/headers'):
+            self._headers()
+        else:
+            self._status(404)
+
+    def do_HEAD(self):
+        if self.path.startswith('/redirect_'):
+            self._redirect()
+        elif self.path.startswith('/method'):
+            self._method('HEAD')
+        else:
+            self._status(404)
+
+    def do_PUT(self):
+        data = self._read_data()
+        if self.path.startswith('/redirect_'):
+            self._redirect()
+        elif self.path.startswith('/method'):
+            self._method('PUT', data)
+        else:
+            self._status(404)
+
+    def do_GET(self):
+
+        def respond(payload=b'<html><video src="/vid.mp4" /></html>',
+                    payload_type='text/html; charset=utf-8',
+                    payload_encoding=None,
+                    resp_code=200):
+            self.send_response(resp_code)
+            self.send_header('Content-Type', payload_type)
+            if payload_encoding:
+                self.send_header('Content-Encoding', payload_encoding)
+            self.send_header('Content-Length', str(len(payload)))  # required for persistent connections
+            self.end_headers()
+            self.wfile.write(payload)
+
+        def gzip_compress(p):
+            buf = io.BytesIO()
+            with contextlib.closing(gzip.GzipFile(fileobj=buf, mode='wb')) as f:
+                f.write(p)
+            return buf.getvalue()
+
+        if self.path == '/video.html':
+            respond()
         elif self.path == '/vid.mp4':
-            self.send_response(200)
-            self.send_header('Content-Type', 'video/mp4')
-            self.end_headers()
-            self.wfile.write(b'\x00\x00\x00\x00\x20\x66\x74[video]')
+            respond(b'\x00\x00\x00\x00\x20\x66\x74[video]', 'video/mp4')
         elif self.path == '/302':
             if sys.version_info[0] == 3:
                 # XXX: Python 3 http server does not allow non-ASCII header values
@@ -42,60 +170,316 @@ class HTTPTestRequestHandler(compat_http_server.BaseHTTPRequestHandler):
                 self.end_headers()
                 return
 
-            new_url = 'http://127.0.0.1:%d/中文.html' % http_server_port(self.server)
+            new_url = self._test_url('中文.html')
             self.send_response(302)
             self.send_header(b'Location', new_url.encode('utf-8'))
             self.end_headers()
         elif self.path == '/%E4%B8%AD%E6%96%87.html':
-            self.send_response(200)
-            self.send_header('Content-Type', 'text/html; charset=utf-8')
+            respond()
+        elif self.path == '/%c7%9f':
+            respond()
+        elif self.path.startswith('/redirect_'):
+            self._redirect()
+        elif self.path.startswith('/method'):
+            self._method('GET')
+        elif self.path.startswith('/headers'):
+            self._headers()
+        elif self.path.startswith('/308-to-headers'):
+            self.send_response(308)
+            self.send_header('Location', '/headers')
+            self.send_header('Content-Length', '0')
             self.end_headers()
-            self.wfile.write(b'<html><video src="/vid.mp4" /></html>')
+        elif self.path == '/trailing_garbage':
+            payload = b'<html><video src="/vid.mp4" /></html>'
+            compressed = gzip_compress(payload) + b'trailing garbage'
+            respond(compressed, payload_encoding='gzip')
+        elif self.path == '/302-non-ascii-redirect':
+            new_url = self._test_url('中文.html')
+            # actually respond with permanent redirect
+            self.send_response(301)
+            self.send_header('Location', new_url)
+            self.send_header('Content-Length', '0')
+            self.end_headers()
+        elif self.path == '/content-encoding':
+            encodings = self.headers.get('ytdl-encoding', '')
+            payload = b'<html><video src="/vid.mp4" /></html>'
+            for encoding in filter(None, (e.strip() for e in encodings.split(','))):
+                if encoding == 'br' and brotli:
+                    payload = brotli.compress(payload)
+                elif encoding == 'gzip':
+                    payload = gzip_compress(payload)
+                elif encoding == 'deflate':
+                    payload = zlib.compress(payload)
+                elif encoding == 'unsupported':
+                    payload = b'raw'
+                    break
                 else:
-            assert False
+                    self._status(415)
+                    return
+            respond(payload, payload_encoding=encodings)
+
+        else:
+            self._status(404)
+
+    def send_header(self, keyword, value):
+        """
+        Forcibly allow HTTP server to send non percent-encoded non-ASCII characters in headers.
+        This is against what is defined in RFC 3986: but we need to test that we support this
+        since some sites incorrectly do this.
+        """
+        if keyword.lower() == 'connection':
+            return self.super('send_header', keyword, value)
+
+        if not hasattr(self, '_headers_buffer'):
+            self._headers_buffer = []
+
+        self._headers_buffer.append('{0}: {1}\r\n'.format(keyword, value).encode('utf-8'))
+
+    def end_headers(self):
+        if hasattr(self, '_headers_buffer'):
+            self.wfile.write(b''.join(self._headers_buffer))
+            self._headers_buffer = []
+        self.super('end_headers')
 
 
 class TestHTTP(unittest.TestCase):
     def setUp(self):
-        self.httpd = compat_http_server.HTTPServer(
+        # HTTP server
+        self.http_httpd = compat_http_server.HTTPServer(
             ('127.0.0.1', 0), HTTPTestRequestHandler)
-        self.port = http_server_port(self.httpd)
-        self.server_thread = threading.Thread(target=self.httpd.serve_forever)
-        self.server_thread.daemon = True
-        self.server_thread.start()
+        self.http_port = http_server_port(self.http_httpd)
+
+        self.http_server_thread = threading.Thread(target=self.http_httpd.serve_forever)
+        self.http_server_thread.daemon = True
+        self.http_server_thread.start()
+
+        try:
+            from http.server import ThreadingHTTPServer
+        except ImportError:
+            try:
+                from socketserver import ThreadingMixIn
+            except ImportError:
+                from SocketServer import ThreadingMixIn
+
+            class ThreadingHTTPServer(ThreadingMixIn, compat_http_server.HTTPServer):
+                pass
+
+        # HTTPS server
+        certfn = os.path.join(TEST_DIR, 'testcert.pem')
+        self.https_httpd = ThreadingHTTPServer(
+            ('127.0.0.1', 0), HTTPTestRequestHandler)
+        try:
+            sslctx = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
+            sslctx.verify_mode = ssl.CERT_NONE
+            sslctx.check_hostname = False
+            sslctx.load_cert_chain(certfn, None)
+            self.https_httpd.socket = sslctx.wrap_socket(
+                self.https_httpd.socket, server_side=True)
+        except AttributeError:
+            self.https_httpd.socket = ssl.wrap_socket(
+                self.https_httpd.socket, certfile=certfn, server_side=True)
+
+        self.https_port = http_server_port(self.https_httpd)
+        self.https_server_thread = threading.Thread(target=self.https_httpd.serve_forever)
+        self.https_server_thread.daemon = True
+        self.https_server_thread.start()
+
+    def tearDown(self):
+
+        def closer(svr):
+            def _closer():
+                svr.shutdown()
+                svr.server_close()
+            return _closer
+
+        shutdown_thread = threading.Thread(target=closer(self.http_httpd))
+        shutdown_thread.start()
+        self.http_server_thread.join(2.0)
+
+        shutdown_thread = threading.Thread(target=closer(self.https_httpd))
+        shutdown_thread.start()
+        self.https_server_thread.join(2.0)
+
+    def _test_url(self, path, host='127.0.0.1', scheme='http', port=None):
+        return '{0}://{1}:{2}/{3}'.format(
+            scheme, host,
+            port if port is not None
+            else self.https_port if scheme == 'https'
+            else self.http_port, path)
+
+    @unittest.skipUnless(
+        sys.version_info >= (3, 2)
+        or (sys.version_info[0] == 2 and sys.version_info[1:] >= (7, 9)),
+        'No support for certificate check in SSL')
+    def test_nocheckcertificate(self):
+        with FakeYDL({'logger': FakeLogger()}) as ydl:
+            with self.assertRaises(compat_urllib_error.URLError):
+                ydl.urlopen(sanitized_Request(self._test_url('headers', scheme='https')))
+
+        with FakeYDL({'logger': FakeLogger(), 'nocheckcertificate': True}) as ydl:
+            r = ydl.urlopen(sanitized_Request(self._test_url('headers', scheme='https')))
+            self.assertEqual(r.getcode(), 200)
+            r.close()
+
+    def test_percent_encode(self):
+        with FakeYDL() as ydl:
+            # Unicode characters should be encoded with uppercase percent-encoding
+            res = ydl.urlopen(sanitized_Request(self._test_url('中文.html')))
+            self.assertEqual(res.getcode(), 200)
+            res.close()
+            # don't normalize existing percent encodings
+            res = ydl.urlopen(sanitized_Request(self._test_url('%c7%9f')))
+            self.assertEqual(res.getcode(), 200)
+            res.close()
 
     def test_unicode_path_redirection(self):
-        # XXX: Python 3 http server does not allow non-ASCII header values
-        if sys.version_info[0] == 3:
-            return
+        with FakeYDL() as ydl:
+            r = ydl.urlopen(sanitized_Request(self._test_url('302-non-ascii-redirect')))
+            self.assertEqual(r.url, self._test_url('%E4%B8%AD%E6%96%87.html'))
+            r.close()
 
-        ydl = YoutubeDL({'logger': FakeLogger()})
-        r = ydl.extract_info('http://127.0.0.1:%d/302' % self.port)
-        self.assertEqual(r['entries'][0]['url'], 'http://127.0.0.1:%d/vid.mp4' % self.port)
+    def test_redirect(self):
+        with FakeYDL() as ydl:
+            def do_req(redirect_status, method, check_no_content=False):
+                data = b'testdata' if method in ('POST', 'PUT') else None
+                res = ydl.urlopen(sanitized_Request(
+                    self._test_url('redirect_{0}'.format(redirect_status)),
+                    method=method, data=data))
+                if check_no_content:
+                    self.assertNotIn('Content-Type', res.headers)
+                return res.read().decode('utf-8'), res.headers.get('method', '')
+            # A 303 must either use GET or HEAD for subsequent request
+            self.assertEqual(do_req(303, 'POST'), ('', 'GET'))
+            self.assertEqual(do_req(303, 'HEAD'), ('', 'HEAD'))
 
+            self.assertEqual(do_req(303, 'PUT'), ('', 'GET'))
 
-class TestHTTPS(unittest.TestCase):
-    def setUp(self):
-        certfn = os.path.join(TEST_DIR, 'testcert.pem')
-        self.httpd = compat_http_server.HTTPServer(
-            ('127.0.0.1', 0), HTTPTestRequestHandler)
-        self.httpd.socket = ssl.wrap_socket(
-            self.httpd.socket, certfile=certfn, server_side=True)
-        self.port = http_server_port(self.httpd)
-        self.server_thread = threading.Thread(target=self.httpd.serve_forever)
-        self.server_thread.daemon = True
-        self.server_thread.start()
+            # 301 and 302 turn POST only into a GET, with no Content-Type
+            self.assertEqual(do_req(301, 'POST', True), ('', 'GET'))
+            self.assertEqual(do_req(301, 'HEAD'), ('', 'HEAD'))
+            self.assertEqual(do_req(302, 'POST', True), ('', 'GET'))
+            self.assertEqual(do_req(302, 'HEAD'), ('', 'HEAD'))
 
-    def test_nocheckcertificate(self):
-        if sys.version_info >= (2, 7, 9):  # No certificate checking anyways
-            ydl = YoutubeDL({'logger': FakeLogger()})
-            self.assertRaises(
-                Exception,
-                ydl.extract_info, 'https://127.0.0.1:%d/video.html' % self.port)
+            self.assertEqual(do_req(301, 'PUT'), ('testdata', 'PUT'))
+            self.assertEqual(do_req(302, 'PUT'), ('testdata', 'PUT'))
 
-        ydl = YoutubeDL({'logger': FakeLogger(), 'nocheckcertificate': True})
-        r = ydl.extract_info('https://127.0.0.1:%d/video.html' % self.port)
-        self.assertEqual(r['entries'][0]['url'], 'https://127.0.0.1:%d/vid.mp4' % self.port)
+            # 307 and 308 should not change method
+            for m in ('POST', 'PUT'):
+                self.assertEqual(do_req(307, m), ('testdata', m))
+                self.assertEqual(do_req(308, m), ('testdata', m))
+
+            self.assertEqual(do_req(307, 'HEAD'), ('', 'HEAD'))
+            self.assertEqual(do_req(308, 'HEAD'), ('', 'HEAD'))
+
+            # These should not redirect and instead raise an HTTPError
+            for code in (300, 304, 305, 306):
+                with self.assertRaises(compat_urllib_HTTPError):
+                    do_req(code, 'GET')
+
+    def test_content_type(self):
+        # https://github.com/yt-dlp/yt-dlp/commit/379a4f161d4ad3e40932dcf5aca6e6fb9715ab28
+        with FakeYDL({'nocheckcertificate': True}) as ydl:
+            # method should be auto-detected as POST
+            r = sanitized_Request(self._test_url('headers', scheme='https'), data=urlencode_postdata({'test': 'test'}))
+
+            headers = ydl.urlopen(r).read().decode('utf-8')
+            self.assertIn('Content-Type: application/x-www-form-urlencoded', headers)
+
+            # test http
+            r = sanitized_Request(self._test_url('headers'), data=urlencode_postdata({'test': 'test'}))
+            headers = ydl.urlopen(r).read().decode('utf-8')
+            self.assertIn('Content-Type: application/x-www-form-urlencoded', headers)
+
+    def test_cookiejar(self):
+        with FakeYDL() as ydl:
+            ydl.cookiejar.set_cookie(compat_http_cookiejar_Cookie(
+                0, 'test', 'ytdl', None, False, '127.0.0.1', True,
+                False, '/headers', True, False, None, False, None, None, {}))
+            data = ydl.urlopen(sanitized_Request(
+                self._test_url('headers'))).read().decode('utf-8')
+            self.assertIn('Cookie: test=ytdl', data)
+
+    def test_passed_cookie_header(self):
+        # We should accept a Cookie header being passed as in normal headers and handle it appropriately.
+        with FakeYDL() as ydl:
+            # Specified Cookie header should be used
+            res = ydl.urlopen(sanitized_Request(
+                self._test_url('headers'), headers={'Cookie': 'test=test'})).read().decode('utf-8')
+            self.assertIn('Cookie: test=test', res)
+
+            # Specified Cookie header should be removed on any redirect
+            res = ydl.urlopen(sanitized_Request(
+                self._test_url('308-to-headers'), headers={'Cookie': 'test=test'})).read().decode('utf-8')
+            self.assertNotIn('Cookie: test=test', res)
+
+            # Specified Cookie header should override global cookiejar for that request
+            ydl.cookiejar.set_cookie(compat_http_cookiejar_Cookie(
+                0, 'test', 'ytdlp', None, False, '127.0.0.1', True,
+                False, '/headers', True, False, None, False, None, None, {}))
+            data = ydl.urlopen(sanitized_Request(
+                self._test_url('headers'), headers={'Cookie': 'test=test'})).read().decode('utf-8')
+            self.assertNotIn('Cookie: test=ytdlp', data)
+            self.assertIn('Cookie: test=test', data)
+
+    def test_no_compression_compat_header(self):
+        with FakeYDL() as ydl:
+            data = ydl.urlopen(
+                sanitized_Request(
+                    self._test_url('headers'),
+                    headers={'Youtubedl-no-compression': True})).read()
+            self.assertIn(b'Accept-Encoding: identity', data)
+            self.assertNotIn(b'youtubedl-no-compression', data.lower())
+
+    def test_gzip_trailing_garbage(self):
+        # https://github.com/ytdl-org/youtube-dl/commit/aa3e950764337ef9800c936f4de89b31c00dfcf5
+        # https://github.com/ytdl-org/youtube-dl/commit/6f2ec15cee79d35dba065677cad9da7491ec6e6f
+        with FakeYDL() as ydl:
+            data = ydl.urlopen(sanitized_Request(self._test_url('trailing_garbage'))).read().decode('utf-8')
+            self.assertEqual(data, '<html><video src="/vid.mp4" /></html>')
+
+    def __test_compression(self, encoding):
+        with FakeYDL() as ydl:
+            res = ydl.urlopen(
+                sanitized_Request(
+                    self._test_url('content-encoding'),
+                    headers={'ytdl-encoding': encoding}))
+            self.assertEqual(res.headers.get('Content-Encoding'), encoding)
+            self.assertEqual(res.read(), b'<html><video src="/vid.mp4" /></html>')
+
+    @unittest.skipUnless(brotli, 'brotli support is not installed')
+    @unittest.expectedFailure
+    def test_brotli(self):
+        self.__test_compression('br')
+
+    @unittest.expectedFailure
+    def test_deflate(self):
+        self.__test_compression('deflate')
+
+    @unittest.expectedFailure
+    def test_gzip(self):
+        self.__test_compression('gzip')
+
+    @unittest.expectedFailure  # not yet implemented
+    def test_multiple_encodings(self):
+        # https://www.rfc-editor.org/rfc/rfc9110.html#section-8.4
+        with FakeYDL() as ydl:
+            for pair in ('gzip,deflate', 'deflate, gzip', 'gzip, gzip', 'deflate, deflate'):
+                res = ydl.urlopen(
+                    sanitized_Request(
+                        self._test_url('content-encoding'),
+                        headers={'ytdl-encoding': pair}))
+                self.assertEqual(res.headers.get('Content-Encoding'), pair)
+                self.assertEqual(res.read(), b'<html><video src="/vid.mp4" /></html>')
+
+    def test_unsupported_encoding(self):
+        # it should return the raw content
+        with FakeYDL() as ydl:
+            res = ydl.urlopen(
+                sanitized_Request(
+                    self._test_url('content-encoding'),
+                    headers={'ytdl-encoding': 'unsupported'}))
+            self.assertEqual(res.headers.get('Content-Encoding'), 'unsupported')
+            self.assertEqual(res.read(), b'raw')
 
 
 def _build_proxy_handler(name):
@@ -109,7 +493,7 @@ def _build_proxy_handler(name):
             self.send_response(200)
             self.send_header('Content-Type', 'text/plain; charset=utf-8')
             self.end_headers()
-            self.wfile.write('{self.proxy_name}: {self.path}'.format(self=self).encode('utf-8'))
+            self.wfile.write('{0}: {1}'.format(self.proxy_name, self.path).encode('utf-8'))
     return HTTPTestRequestHandler
 
 
@@ -129,10 +513,30 @@ class TestProxy(unittest.TestCase):
         self.geo_proxy_thread.daemon = True
         self.geo_proxy_thread.start()
 
+    def tearDown(self):
+
+        def closer(svr):
+            def _closer():
+                svr.shutdown()
+                svr.server_close()
+            return _closer
+
+        shutdown_thread = threading.Thread(target=closer(self.proxy))
+        shutdown_thread.start()
+        self.proxy_thread.join(2.0)
+
+        shutdown_thread = threading.Thread(target=closer(self.geo_proxy))
+        shutdown_thread.start()
+        self.geo_proxy_thread.join(2.0)
+
+    def _test_proxy(self, host='127.0.0.1', port=None):
+        return '{0}:{1}'.format(
+            host, port if port is not None else self.port)
+
     def test_proxy(self):
-        geo_proxy = '127.0.0.1:{0}'.format(self.geo_port)
+        geo_proxy = self._test_proxy(port=self.geo_port)
         ydl = YoutubeDL({
-            'proxy': '127.0.0.1:{0}'.format(self.port),
+            'proxy': self._test_proxy(),
             'geo_verification_proxy': geo_proxy,
         })
         url = 'http://foo.com/bar'
@@ -146,7 +550,7 @@ class TestProxy(unittest.TestCase):
 
     def test_proxy_with_idn(self):
         ydl = YoutubeDL({
-            'proxy': '127.0.0.1:{0}'.format(self.port),
+            'proxy': self._test_proxy(),
         })
         url = 'http://中文.tw/'
         response = ydl.urlopen(url).read().decode('utf-8')
@@ -154,5 +558,25 @@ class TestProxy(unittest.TestCase):
         self.assertEqual(response, 'normal: http://xn--fiq228c.tw/')
 
 
+class TestFileURL(unittest.TestCase):
+    # See https://github.com/ytdl-org/youtube-dl/issues/8227
+    def test_file_urls(self):
+        tf = tempfile.NamedTemporaryFile(delete=False)
+        tf.write(b'foobar')
+        tf.close()
+        url = compat_urllib_parse.urljoin('file://', pathname2url(tf.name))
+        with FakeYDL() as ydl:
+            self.assertRaisesRegexp(
+                compat_urllib_error.URLError, 'file:// scheme is explicitly disabled in youtube-dl for security reasons', ydl.urlopen, url)
+        # not yet implemented
+        """
+        with FakeYDL({'enable_file_urls': True}) as ydl:
+            res = ydl.urlopen(url)
+            self.assertEqual(res.read(), b'foobar')
+            res.close()
+        """
+        os.unlink(tf.name)
+
+
 if __name__ == '__main__':
     unittest.main()

test/test_utils.py

@@ -79,10 +79,12 @@ from youtube_dl.utils import (
     rot47,
     shell_quote,
     smuggle_url,
+    str_or_none,
     str_to_int,
     strip_jsonp,
     strip_or_none,
     subtitles_filename,
+    T,
     timeconvert,
     traverse_obj,
     try_call,
@@ -1566,6 +1568,7 @@ Line 1
         self.assertEqual(variadic('spam', allowed_types=[dict]), 'spam')
 
     def test_traverse_obj(self):
+        str = compat_str
         _TEST_DATA = {
             100: 100,
             1.2: 1.2,
@@ -1598,8 +1601,8 @@ Line 1
 
         # Test Ellipsis behavior
         self.assertCountEqual(traverse_obj(_TEST_DATA, Ellipsis),
-                              (item for item in _TEST_DATA.values() if item is not None),
-                              msg='`...` should give all values except `None`')
+                              (item for item in _TEST_DATA.values() if item not in (None, {})),
+                              msg='`...` should give all non discarded values')
         self.assertCountEqual(traverse_obj(_TEST_DATA, ('urls', 0, Ellipsis)), _TEST_DATA['urls'][0].values(),
                               msg='`...` selection for dicts should select all values')
         self.assertEqual(traverse_obj(_TEST_DATA, (Ellipsis, Ellipsis, 'url')),
@@ -1607,13 +1610,51 @@ Line 1
                          msg='nested `...` queries should work')
         self.assertCountEqual(traverse_obj(_TEST_DATA, (Ellipsis, Ellipsis, 'index')), range(4),
                               msg='`...` query result should be flattened')
+        self.assertEqual(traverse_obj(iter(range(4)), Ellipsis), list(range(4)),
+                         msg='`...` should accept iterables')
 
         # Test function as key
         self.assertEqual(traverse_obj(_TEST_DATA, lambda x, y: x == 'urls' and isinstance(y, list)),
                          [_TEST_DATA['urls']],
                          msg='function as query key should perform a filter based on (key, value)')
-        self.assertCountEqual(traverse_obj(_TEST_DATA, lambda _, x: isinstance(x[0], compat_str)), ('str',),
-                              msg='exceptions in the query function should be caught')
+        self.assertCountEqual(traverse_obj(_TEST_DATA, lambda _, x: isinstance(x[0], str)), set(('str',)),
+                              msg='exceptions in the query function should be catched')
+        self.assertEqual(traverse_obj(iter(range(4)), lambda _, x: x % 2 == 0), [0, 2],
+                         msg='function key should accept iterables')
+        if __debug__:
+            with self.assertRaises(Exception, msg='Wrong function signature should raise in debug'):
+                traverse_obj(_TEST_DATA, lambda a: Ellipsis)
+            with self.assertRaises(Exception, msg='Wrong function signature should raise in debug'):
+                traverse_obj(_TEST_DATA, lambda a, b, c: Ellipsis)
+
+        # Test set as key (transformation/type, like `expected_type`)
+        self.assertEqual(traverse_obj(_TEST_DATA, (Ellipsis, T(str.upper), )), ['STR'],
+                         msg='Function in set should be a transformation')
+        self.assertEqual(traverse_obj(_TEST_DATA, (Ellipsis, T(str))), ['str'],
+                         msg='Type in set should be a type filter')
+        self.assertEqual(traverse_obj(_TEST_DATA, T(dict)), _TEST_DATA,
+                         msg='A single set should be wrapped into a path')
+        self.assertEqual(traverse_obj(_TEST_DATA, (Ellipsis, T(str.upper))), ['STR'],
+                         msg='Transformation function should not raise')
+        self.assertEqual(traverse_obj(_TEST_DATA, (Ellipsis, T(str_or_none))),
+                         [item for item in map(str_or_none, _TEST_DATA.values()) if item is not None],
+                         msg='Function in set should be a transformation')
+        if __debug__:
+            with self.assertRaises(Exception, msg='Sets with length != 1 should raise in debug'):
+                traverse_obj(_TEST_DATA, set())
+            with self.assertRaises(Exception, msg='Sets with length != 1 should raise in debug'):
+                traverse_obj(_TEST_DATA, set((str.upper, str)))
+
+        # Test `slice` as a key
+        _SLICE_DATA = [0, 1, 2, 3, 4]
+        self.assertEqual(traverse_obj(_TEST_DATA, ('dict', slice(1))), None,
+                         msg='slice on a dictionary should not throw')
+        self.assertEqual(traverse_obj(_SLICE_DATA, slice(1)), _SLICE_DATA[:1],
+                         msg='slice key should apply slice to sequence')
+        self.assertEqual(traverse_obj(_SLICE_DATA, slice(1, 2)), _SLICE_DATA[1:2],
+                         msg='slice key should apply slice to sequence')
+        self.assertEqual(traverse_obj(_SLICE_DATA, slice(1, 4, 2)), _SLICE_DATA[1:4:2],
+                         msg='slice key should apply slice to sequence')
 
         # Test alternative paths
         self.assertEqual(traverse_obj(_TEST_DATA, 'fail', 'str'), 'str',
@@ -1659,15 +1700,23 @@ Line 1
                          {0: ['https://www.example.com/1', 'https://www.example.com/0']},
                          msg='triple nesting in dict path should be treated as branches')
         self.assertEqual(traverse_obj(_TEST_DATA, {0: 'fail'}), {},
-                         msg='remove `None` values when dict key')
+                         msg='remove `None` values when top level dict key fails')
         self.assertEqual(traverse_obj(_TEST_DATA, {0: 'fail'}, default=Ellipsis), {0: Ellipsis},
-                         msg='do not remove `None` values if `default`')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: 'dict'}), {0: {}},
-                         msg='do not remove empty values when dict key')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: 'dict'}, default=Ellipsis), {0: {}},
-                         msg='do not remove empty values when dict key and a default')
-        self.assertEqual(traverse_obj(_TEST_DATA, {0: ('dict', Ellipsis)}), {0: []},
-                         msg='if branch in dict key not successful, return `[]`')
+                         msg='use `default` if key fails and `default`')
+        self.assertEqual(traverse_obj(_TEST_DATA, {0: 'dict'}), {},
+                         msg='remove empty values when dict key')
+        self.assertEqual(traverse_obj(_TEST_DATA, {0: 'dict'}, default=Ellipsis), {0: Ellipsis},
+                         msg='use `default` when dict key and `default`')
+        self.assertEqual(traverse_obj(_TEST_DATA, {0: {0: 'fail'}}), {},
+                         msg='remove empty values when nested dict key fails')
+        self.assertEqual(traverse_obj(None, {0: 'fail'}), {},
+                         msg='default to dict if pruned')
+        self.assertEqual(traverse_obj(None, {0: 'fail'}, default=Ellipsis), {0: Ellipsis},
+                         msg='default to dict if pruned and default is given')
+        self.assertEqual(traverse_obj(_TEST_DATA, {0: {0: 'fail'}}, default=Ellipsis), {0: {0: Ellipsis}},
+                         msg='use nested `default` when nested dict key fails and `default`')
+        self.assertEqual(traverse_obj(_TEST_DATA, {0: ('dict', Ellipsis)}), {},
+                         msg='remove key if branch in dict key not successful')
 
         # Testing default parameter behavior
         _DEFAULT_DATA = {'None': None, 'int': 0, 'list': []}
@@ -1691,20 +1740,55 @@ Line 1
                          msg='if branched but not successful return `[]`, not `default`')
         self.assertEqual(traverse_obj(_DEFAULT_DATA, ('list', Ellipsis)), [],
                          msg='if branched but object is empty return `[]`, not `default`')
+        self.assertEqual(traverse_obj(None, Ellipsis), [],
+                         msg='if branched but object is `None` return `[]`, not `default`')
+        self.assertEqual(traverse_obj({0: None}, (0, Ellipsis)), [],
+                         msg='if branched but state is `None` return `[]`, not `default`')
+
+        branching_paths = [
+            ('fail', Ellipsis),
+            (Ellipsis, 'fail'),
+            100 * ('fail',) + (Ellipsis,),
+            (Ellipsis,) + 100 * ('fail',),
+        ]
+        for branching_path in branching_paths:
+            self.assertEqual(traverse_obj({}, branching_path), [],
+                             msg='if branched but state is `None`, return `[]` (not `default`)')
+            self.assertEqual(traverse_obj({}, 'fail', branching_path), [],
+                             msg='if branching in last alternative and previous did not match, return `[]` (not `default`)')
+            self.assertEqual(traverse_obj({0: 'x'}, 0, branching_path), 'x',
+                             msg='if branching in last alternative and previous did match, return single value')
+            self.assertEqual(traverse_obj({0: 'x'}, branching_path, 0), 'x',
+                             msg='if branching in first alternative and non-branching path does match, return single value')
+            self.assertEqual(traverse_obj({}, branching_path, 'fail'), None,
+                             msg='if branching in first alternative and non-branching path does not match, return `default`')
 
         # Testing expected_type behavior
         _EXPECTED_TYPE_DATA = {'str': 'str', 'int': 0}
-        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, 'str', expected_type=compat_str), 'str',
-                         msg='accept matching `expected_type` type')
-        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, 'str', expected_type=int), None,
-                         msg='reject non matching `expected_type` type')
-        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, 'int', expected_type=lambda x: compat_str(x)), '0',
-                         msg='transform type using type function')
-        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, 'str',
-                                      expected_type=lambda _: 1 / 0), None,
-                         msg='wrap expected_type function in try_call')
-        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, Ellipsis, expected_type=compat_str), ['str'],
-                         msg='eliminate items that expected_type fails on')
+        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, 'str', expected_type=str),
+                         'str', msg='accept matching `expected_type` type')
+        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, 'str', expected_type=int),
+                         None, msg='reject non matching `expected_type` type')
+        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, 'int', expected_type=lambda x: str(x)),
+                         '0', msg='transform type using type function')
+        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, 'str', expected_type=lambda _: 1 / 0),
+                         None, msg='wrap expected_type function in try_call')
+        self.assertEqual(traverse_obj(_EXPECTED_TYPE_DATA, Ellipsis, expected_type=str),
+                         ['str'], msg='eliminate items that expected_type fails on')
+        self.assertEqual(traverse_obj(_TEST_DATA, {0: 100, 1: 1.2}, expected_type=int),
+                         {0: 100}, msg='type as expected_type should filter dict values')
+        self.assertEqual(traverse_obj(_TEST_DATA, {0: 100, 1: 1.2, 2: 'None'}, expected_type=str_or_none),
+                         {0: '100', 1: '1.2'}, msg='function as expected_type should transform dict values')
+        self.assertEqual(traverse_obj(_TEST_DATA, ({0: 1.2}, 0, set((int_or_none,))), expected_type=int),
+                         1, msg='expected_type should not filter non final dict values')
+        self.assertEqual(traverse_obj(_TEST_DATA, {0: {0: 100, 1: 'str'}}, expected_type=int),
+                         {0: {0: 100}}, msg='expected_type should transform deep dict values')
+        self.assertEqual(traverse_obj(_TEST_DATA, [({0: '...'}, {0: '...'})], expected_type=type(Ellipsis)),
+                         [{0: Ellipsis}, {0: Ellipsis}], msg='expected_type should transform branched dict values')
+        self.assertEqual(traverse_obj({1: {3: 4}}, [(1, 2), 3], expected_type=int),
+                         [4], msg='expected_type regression for type matching in tuple branching')
+        self.assertEqual(traverse_obj(_TEST_DATA, ['data', Ellipsis], expected_type=int),
+                         [], msg='expected_type regression for type matching in dict result')
 
         # Test get_all behavior
         _GET_ALL_DATA = {'key': [0, 1, 2]}
@@ -1749,14 +1833,23 @@ Line 1
                                       _traverse_string=True), '.',
                          msg='traverse into converted data if `traverse_string`')
         self.assertEqual(traverse_obj(_TRAVERSE_STRING_DATA, ('str', Ellipsis),
-                                      _traverse_string=True), list('str'),
-                         msg='`...` branching into string should result in list')
+                                      _traverse_string=True), 'str',
+                         msg='`...` should result in string (same value) if `traverse_string`')
+        self.assertEqual(traverse_obj(_TRAVERSE_STRING_DATA, ('str', slice(0, None, 2)),
+                                      _traverse_string=True), 'sr',
+                         msg='`slice` should result in string if `traverse_string`')
+        self.assertEqual(traverse_obj(_TRAVERSE_STRING_DATA, ('str', lambda i, v: i or v == "s"),
+                                      _traverse_string=True), 'str',
+                         msg='function should result in string if `traverse_string`')
         self.assertEqual(traverse_obj(_TRAVERSE_STRING_DATA, ('str', (0, 2)),
                                       _traverse_string=True), ['s', 'r'],
-                         msg='branching into string should result in list')
-        self.assertEqual(traverse_obj(_TRAVERSE_STRING_DATA, ('str', lambda _, x: x),
-                                      _traverse_string=True), list('str'),
-                         msg='function branching into string should result in list')
+                         msg='branching should result in list if `traverse_string`')
+        self.assertEqual(traverse_obj({}, (0, Ellipsis), _traverse_string=True), [],
+                         msg='branching should result in list if `traverse_string`')
+        self.assertEqual(traverse_obj({}, (0, lambda x, y: True), _traverse_string=True), [],
+                         msg='branching should result in list if `traverse_string`')
+        self.assertEqual(traverse_obj({}, (0, slice(1)), _traverse_string=True), [],
+                         msg='branching should result in list if `traverse_string`')
 
         # Test is_user_input behavior
         _IS_USER_INPUT_DATA = {'range8': list(range(8))}
@@ -1793,6 +1886,8 @@ Line 1
                          msg='failing str key on a `re.Match` should return `default`')
         self.assertEqual(traverse_obj(mobj, 8), None,
                          msg='failing int key on a `re.Match` should return `default`')
+        self.assertEqual(traverse_obj(mobj, lambda k, _: k in (0, 'group')), ['0123', '3'],
+                         msg='function on a `re.Match` should give group name as well')
 
     def test_get_first(self):
         self.assertEqual(get_first([{'a': None}, {'a': 'spam'}], 'a'), 'spam')

youtube_dl/YoutubeDL.py

@@ -5,6 +5,7 @@ from __future__ import absolute_import, unicode_literals
 
 import collections
 import contextlib
+import copy
 import datetime
 import errno
 import fileinput
@@ -34,10 +35,12 @@ from string import ascii_letters
 
 from .compat import (
     compat_basestring,
-    compat_cookiejar,
+    compat_collections_chain_map as ChainMap,
     compat_filter as filter,
     compat_get_terminal_size,
     compat_http_client,
+    compat_http_cookiejar_Cookie,
+    compat_http_cookies_SimpleCookie,
     compat_integer_types,
     compat_kwargs,
     compat_map as map,
@@ -53,6 +56,7 @@ from .compat import (
 from .utils import (
     age_restricted,
     args_to_str,
+    bug_reports_message,
     ContentTooShortError,
     date_from_str,
     DateRange,
@@ -97,6 +101,7 @@ from .utils import (
     std_headers,
     str_or_none,
     subtitles_filename,
+    traverse_obj,
     UnavailableVideoError,
     url_basename,
     version_tuple,
@@ -376,6 +381,9 @@ class YoutubeDL(object):
         self.params.update(params)
         self.cache = Cache(self)
 
+        self._header_cookies = []
+        self._load_cookies_from_headers(self.params.get('http_headers'))
+
         def check_deprecated(param, option, suggestion):
             if self.params.get(param) is not None:
                 self.report_warning(
@@ -582,7 +590,7 @@ class YoutubeDL(object):
         if self.params.get('cookiefile') is not None:
             self.cookiejar.save(ignore_discard=True, ignore_expires=True)
 
-    def trouble(self, message=None, tb=None):
+    def trouble(self, *args, **kwargs):
         """Determine action to take when a download problem appears.
 
         Depending on if the downloader has been configured to ignore
@@ -591,6 +599,11 @@ class YoutubeDL(object):
 
         tb, if given, is additional traceback information.
         """
+        # message=None, tb=None, is_error=True
+        message = args[0] if len(args) > 0 else kwargs.get('message', None)
+        tb = args[1] if len(args) > 1 else kwargs.get('tb', None)
+        is_error = args[2] if len(args) > 2 else kwargs.get('is_error', True)
+
         if message is not None:
             self.to_stderr(message)
         if self.params.get('verbose'):
@@ -603,7 +616,10 @@ class YoutubeDL(object):
                 else:
                     tb_data = traceback.format_list(traceback.extract_stack())
                     tb = ''.join(tb_data)
+            if tb:
                 self.to_stderr(tb)
+        if not is_error:
+            return
         if not self.params.get('ignoreerrors', False):
             if sys.exc_info()[0] and hasattr(sys.exc_info()[1], 'exc_info') and sys.exc_info()[1].exc_info[0]:
                 exc_info = sys.exc_info()[1].exc_info
@@ -612,11 +628,18 @@ class YoutubeDL(object):
             raise DownloadError(message, exc_info)
         self._download_retcode = 1
 
-    def report_warning(self, message):
+    def report_warning(self, message, only_once=False, _cache={}):
         '''
         Print the message to stderr, it will be prefixed with 'WARNING:'
         If stderr is a tty file the 'WARNING:' will be colored
         '''
+        if only_once:
+            m_hash = hash((self, message))
+            m_cnt = _cache.setdefault(m_hash, 0)
+            _cache[m_hash] = m_cnt + 1
+            if m_cnt > 0:
+                return
+
         if self.params.get('logger') is not None:
             self.params['logger'].warning(message)
         else:
@@ -629,7 +652,7 @@ class YoutubeDL(object):
             warning_message = '%s %s' % (_msg_header, message)
             self.to_stderr(warning_message)
 
-    def report_error(self, message, tb=None):
+    def report_error(self, message, *args, **kwargs):
         '''
         Do the same as trouble, but prefixes the message with 'ERROR:', colored
         in red if stderr is a tty file.
@@ -638,8 +661,18 @@ class YoutubeDL(object):
             _msg_header = '\033[0;31mERROR:\033[0m'
         else:
             _msg_header = 'ERROR:'
-        error_message = '%s %s' % (_msg_header, message)
-        self.trouble(error_message, tb)
+        kwargs['message'] = '%s %s' % (_msg_header, message)
+        self.trouble(*args, **kwargs)
+
+    def report_unscoped_cookies(self, *args, **kwargs):
+        # message=None, tb=False, is_error=False
+        if len(args) <= 2:
+            kwargs.setdefault('is_error', False)
+            if len(args) <= 0:
+                kwargs.setdefault(
+                    'message',
+                    'Unscoped cookies are not allowed: please specify some sort of scoping')
+        self.report_error(*args, **kwargs)
 
     def report_file_already_downloaded(self, file_name):
         """Report file has already been fully downloaded."""
@@ -835,7 +868,7 @@ class YoutubeDL(object):
                 msg += '\nYou might want to use a VPN or a proxy server (with --proxy) to workaround.'
                 self.report_error(msg)
             except ExtractorError as e:  # An error we somewhat expected
-                self.report_error(compat_str(e), e.format_traceback())
+                self.report_error(compat_str(e), tb=e.format_traceback())
             except MaxDownloadsReached:
                 raise
             except Exception as e:
@@ -845,8 +878,83 @@ class YoutubeDL(object):
                     raise
         return wrapper
 
+    def _remove_cookie_header(self, http_headers):
+        """Filters out `Cookie` header from an `http_headers` dict
+        The `Cookie` header is removed to prevent leaks as a result of unscoped cookies.
+        See: https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-v8mc-9377-rwjj
+
+        @param http_headers     An `http_headers` dict from which any `Cookie` header
+                                should be removed, or None
+        """
+        return dict(filter(lambda pair: pair[0].lower() != 'cookie', (http_headers or {}).items()))
+
+    def _load_cookies(self, data, **kwargs):
+        """Loads cookies from a `Cookie` header
+
+        This tries to work around the security vulnerability of passing cookies to every domain.
+
+        @param data         The Cookie header as a string to load the cookies from
+        @param autoscope    If `False`, scope cookies using Set-Cookie syntax and error for cookie without domains
+                            If `True`, save cookies for later to be stored in the jar with a limited scope
+                            If a URL, save cookies in the jar with the domain of the URL
+        """
+        # autoscope=True (kw-only)
+        autoscope = kwargs.get('autoscope', True)
+
+        for cookie in compat_http_cookies_SimpleCookie(data).values() if data else []:
+            if autoscope and any(cookie.values()):
+                raise ValueError('Invalid syntax in Cookie Header')
+
+            domain = cookie.get('domain') or ''
+            expiry = cookie.get('expires')
+            if expiry == '':  # 0 is valid so we check for `''` explicitly
+                expiry = None
+            prepared_cookie = compat_http_cookiejar_Cookie(
+                cookie.get('version') or 0, cookie.key, cookie.value, None, False,
+                domain, True, True, cookie.get('path') or '', bool(cookie.get('path')),
+                bool(cookie.get('secure')), expiry, False, None, None, {})
+
+            if domain:
+                self.cookiejar.set_cookie(prepared_cookie)
+            elif autoscope is True:
+                self.report_warning(
+                    'Passing cookies as a header is a potential security risk; '
+                    'they will be scoped to the domain of the downloaded urls. '
+                    'Please consider loading cookies from a file or browser instead.',
+                    only_once=True)
+                self._header_cookies.append(prepared_cookie)
+            elif autoscope:
+                self.report_warning(
+                    'The extractor result contains an unscoped cookie as an HTTP header. '
+                    'If you are specifying an input URL, ' + bug_reports_message(),
+                    only_once=True)
+                self._apply_header_cookies(autoscope, [prepared_cookie])
+            else:
+                self.report_unscoped_cookies()
+
+    def _load_cookies_from_headers(self, headers):
+        self._load_cookies(traverse_obj(headers, 'cookie', casesense=False))
+
+    def _apply_header_cookies(self, url, cookies=None):
+        """This method applies stray header cookies to the provided url
+
+        This loads header cookies and scopes them to the domain provided in `url`.
+        While this is not ideal, it helps reduce the risk of them being sent to
+        an unintended destination.
+        """
+        parsed = compat_urllib_parse.urlparse(url)
+        if not parsed.hostname:
+            return
+
+        for cookie in map(copy.copy, cookies or self._header_cookies):
+            cookie.domain = '.' + parsed.hostname
+            self.cookiejar.set_cookie(cookie)
+
     @__handle_extraction_exceptions
     def __extract_info(self, url, ie, download, extra_info, process):
+        # Compat with passing cookies in http headers
+        self._apply_header_cookies(url)
+
         ie_result = ie.extract(url)
         if ie_result is None:  # Finished already (backwards compatibility; listformats and friends should be moved here)
             return
@@ -872,7 +980,7 @@ class YoutubeDL(object):
 
     def process_ie_result(self, ie_result, download=True, extra_info={}):
         """
-        Take the result of the ie(may be modified) and resolve all unresolved
+        Take the result of the ie (may be modified) and resolve all unresolved
         references (URLs, playlist items).
 
         It will also download the videos if 'download'.
@@ -1443,23 +1551,45 @@ class YoutubeDL(object):
         parsed_selector = _parse_format_selection(iter(TokenIterator(tokens)))
         return _build_selector_function(parsed_selector)
 
-    def _calc_headers(self, info_dict):
-        res = std_headers.copy()
+    def _calc_headers(self, info_dict, load_cookies=False):
+        if load_cookies:  # For --load-info-json
+            # load cookies from http_headers in legacy info.json
+            self._load_cookies(traverse_obj(info_dict, ('http_headers', 'Cookie'), casesense=False),
+                               autoscope=info_dict['url'])
+            # load scoped cookies from info.json
+            self._load_cookies(info_dict.get('cookies'), autoscope=False)
 
-        add_headers = info_dict.get('http_headers')
-        if add_headers:
-            res.update(add_headers)
-
-        cookies = self._calc_cookies(info_dict)
+        cookies = self.cookiejar.get_cookies_for_url(info_dict['url'])
         if cookies:
-            res['Cookie'] = cookies
+            # Make a string like name1=val1; attr1=a_val1; ...name2=val2; ...
+            # By convention a cookie name can't be a well-known attribute name
+            # so this syntax is unambiguous and can be parsed by (eg) SimpleCookie
+            encoder = compat_http_cookies_SimpleCookie()
+            values = []
+            attributes = (('Domain', '='), ('Path', '='), ('Secure',), ('Expires', '='), ('Version', '='))
+            attributes = tuple([x[0].lower()] + list(x) for x in attributes)
+            for cookie in cookies:
+                _, value = encoder.value_encode(cookie.value)
+                # Py 2 '' --> '', Py 3 '' --> '""'
+                if value == '':
+                    value = '""'
+                values.append('='.join((cookie.name, value)))
+                for attr in attributes:
+                    value = getattr(cookie, attr[0], None)
+                    if value:
+                        values.append('%s%s' % (''.join(attr[1:]), value if len(attr) == 3 else ''))
+            info_dict['cookies'] = '; '.join(values)
+
+        res = std_headers.copy()
+        res.update(info_dict.get('http_headers') or {})
+        res = self._remove_cookie_header(res)
 
         if 'X-Forwarded-For' not in res:
             x_forwarded_for_ip = info_dict.get('__x_forwarded_for_ip')
             if x_forwarded_for_ip:
                 res['X-Forwarded-For'] = x_forwarded_for_ip
 
-        return res
+        return res or None
 
     def _calc_cookies(self, info_dict):
         pr = sanitized_Request(info_dict['url'])
@@ -1638,10 +1768,13 @@ class YoutubeDL(object):
                 format['protocol'] = determine_protocol(format)
             # Add HTTP headers, so that external programs can use them from the
             # json output
-            full_format_info = info_dict.copy()
-            full_format_info.update(format)
-            format['http_headers'] = self._calc_headers(full_format_info)
-        # Remove private housekeeping stuff
+            format['http_headers'] = self._calc_headers(ChainMap(format, info_dict), load_cookies=True)
+
+        # Safeguard against old/insecure infojson when using --load-info-json
+        info_dict['http_headers'] = self._remove_cookie_header(
+            info_dict.get('http_headers') or {}) or None
+
+        # Remove private housekeeping stuff (copied to http_headers in _calc_headers())
         if '__x_forwarded_for_ip' in info_dict:
             del info_dict['__x_forwarded_for_ip']
 
@@ -1902,17 +2035,9 @@ class YoutubeDL(object):
                                                 (sub_lang, error_to_compat_str(err)))
                             continue
 
-        if self.params.get('writeinfojson', False):
-            infofn = replace_extension(filename, 'info.json', info_dict.get('ext'))
-            if self.params.get('nooverwrites', False) and os.path.exists(encodeFilename(infofn)):
-                self.to_screen('[info] Video description metadata is already present')
-            else:
-                self.to_screen('[info] Writing video description metadata as JSON to: ' + infofn)
-                try:
-                    write_json_file(self.filter_requested_info(info_dict), infofn)
-                except (OSError, IOError):
-                    self.report_error('Cannot write metadata to JSON file ' + infofn)
-                    return
+        self._write_info_json(
+            'video description', info_dict,
+            replace_extension(filename, 'info.json', info_dict.get('ext')))
 
         self._write_thumbnails(info_dict, filename)
 
@@ -1933,7 +2058,11 @@ class YoutubeDL(object):
                         fd.add_progress_hook(ph)
                     if self.params.get('verbose'):
                         self.to_screen('[debug] Invoking downloader on %r' % info.get('url'))
-                    return fd.download(name, info)
+
+                    new_info = dict((k, v) for k, v in info.items() if not k.startswith('__p'))
+                    new_info['http_headers'] = self._calc_headers(new_info)
+
+                    return fd.download(name, new_info)
 
                 if info_dict.get('requested_formats') is not None:
                     downloaded = []
@@ -2378,10 +2507,12 @@ class YoutubeDL(object):
                 self.get_encoding()))
         write_string(encoding_str, encoding=None)
 
-        self._write_string('[debug] youtube-dl version ' + __version__ + (' (single file build)\n' if ytdl_is_updateable() else '\n'))
+        writeln_debug = lambda *s: self._write_string('[debug] %s\n' % (''.join(s), ))
+        writeln_debug('youtube-dl version ', __version__)
         if _LAZY_LOADER:
-            self._write_string('[debug] Lazy loading extractors enabled\n')
-        writeln_debug = lambda *s: self._write_string('[debug] %s\n' % (''.join(s), ))  # moved down for easier merge
+            writeln_debug('Lazy loading extractors enabled')
+        if ytdl_is_updateable():
+            writeln_debug('Single file build')
         try:
             sp = subprocess.Popen(
                 ['git', 'rev-parse', '--short', 'HEAD'],
@@ -2457,7 +2588,7 @@ class YoutubeDL(object):
         opts_proxy = self.params.get('proxy')
 
         if opts_cookiefile is None:
-            self.cookiejar = compat_cookiejar.CookieJar()
+            self.cookiejar = YoutubeDLCookieJar()
         else:
             opts_cookiefile = expand_path(opts_cookiefile)
             self.cookiejar = YoutubeDLCookieJar(opts_cookiefile)
@@ -2518,6 +2649,28 @@ class YoutubeDL(object):
             encoding = preferredencoding()
         return encoding
 
+    def _write_info_json(self, label, info_dict, infofn, overwrite=None):
+        if not self.params.get('writeinfojson', False):
+            return False
+
+        def msg(fmt, lbl):
+            return fmt % (lbl + ' metadata',)
+
+        if overwrite is None:
+            overwrite = not self.params.get('nooverwrites', False)
+
+        if not overwrite and os.path.exists(encodeFilename(infofn)):
+            self.to_screen(msg('[info] %s is already present', label.title()))
+            return 'exists'
+        else:
+            self.to_screen(msg('[info] Writing %s as JSON to: ' + infofn, label))
+            try:
+                write_json_file(self.filter_requested_info(info_dict), infofn)
+                return True
+            except (OSError, IOError):
+                self.report_error(msg('Cannot write %s to JSON file ' + infofn, label))
+                return
+
     def _write_thumbnails(self, info_dict, filename):
         if self.params.get('writethumbnail', False):
             thumbnails = info_dict.get('thumbnails')

youtube_dl/compat.py

@@ -21,6 +21,7 @@ import socket
 import struct
 import subprocess
 import sys
+import types
 import xml.etree.ElementTree
 
 # naming convention
@@ -55,6 +56,22 @@ try:
 except ImportError:  # Python 2
     import urllib2 as compat_urllib_request
 
+# Also fix up lack of method arg in old Pythons
+try:
+    _req = compat_urllib_request.Request
+    _req('http://127.0.0.1', method='GET')
+except TypeError:
+    class _request(object):
+        def __new__(cls, url, *args, **kwargs):
+            method = kwargs.pop('method', None)
+            r = _req(url, *args, **kwargs)
+            if method:
+                r.get_method = types.MethodType(lambda _: method, r)
+            return r
+
+    compat_urllib_request.Request = _request
+
+
 try:
     import urllib.error as compat_urllib_error
 except ImportError:  # Python 2
@@ -79,6 +96,12 @@ try:
 except ImportError:  # Python 2
     import urllib as compat_urllib_response
 
+try:
+    compat_urllib_response.addinfourl.status
+except AttributeError:
+    # .getcode() is deprecated in Py 3.
+    compat_urllib_response.addinfourl.status = property(lambda self: self.getcode())
+
 try:
     import http.cookiejar as compat_cookiejar
 except ImportError:  # Python 2
@@ -103,12 +126,24 @@ except ImportError:  # Python 2
     import Cookie as compat_cookies
 compat_http_cookies = compat_cookies
 
-if sys.version_info[0] == 2:
+if sys.version_info[0] == 2 or sys.version_info < (3, 3):
     class compat_cookies_SimpleCookie(compat_cookies.SimpleCookie):
         def load(self, rawdata):
+            must_have_value = 0
+            if not isinstance(rawdata, dict):
+                if sys.version_info[:2] != (2, 7):
+                    # attribute must have value for parsing
+                    rawdata, must_have_value = re.subn(
+                        r'(?i)(;\s*)(secure|httponly)(\s*(?:;|$))', r'\1\2=\2\3', rawdata)
+                if sys.version_info[0] == 2:
                     if isinstance(rawdata, compat_str):
                         rawdata = str(rawdata)
-            return super(compat_cookies_SimpleCookie, self).load(rawdata)
+            super(compat_cookies_SimpleCookie, self).load(rawdata)
+            if must_have_value > 0:
+                for morsel in self.values():
+                    for attr in ('secure', 'httponly'):
+                        if morsel.get(attr):
+                            morsel[attr] = True
 else:
     compat_cookies_SimpleCookie = compat_cookies.SimpleCookie
 compat_http_cookies_SimpleCookie = compat_cookies_SimpleCookie
@@ -2360,6 +2395,11 @@ try:
     import http.client as compat_http_client
 except ImportError:  # Python 2
     import httplib as compat_http_client
+try:
+    compat_http_client.HTTPResponse.getcode
+except AttributeError:
+    # Py < 3.1
+    compat_http_client.HTTPResponse.getcode = lambda self: self.status
 
 try:
     from urllib.error import HTTPError as compat_HTTPError

youtube_dl/downloader/common.py

@@ -339,6 +339,10 @@ class FileDownloader(object):
     def download(self, filename, info_dict):
         """Download to a filename using the info from info_dict
         Return True on success and False otherwise
+
+        This method filters the `Cookie` header from the info_dict to prevent leaks.
+        Downloaders have their own way of handling cookies.
+        See: https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-v8mc-9377-rwjj
         """
 
         nooverwrites_and_exists = (

youtube_dl/downloader/external.py

@@ -1,9 +1,10 @@
 from __future__ import unicode_literals
 
-import os.path
+import os
 import re
 import subprocess
 import sys
+import tempfile
 import time
 
 from .common import FileDownloader
@@ -23,6 +24,8 @@ from ..utils import (
     check_executable,
     is_outdated_version,
     process_communicate_or_kill,
+    T,
+    traverse_obj,
 )
 
 
@@ -30,6 +33,7 @@ class ExternalFD(FileDownloader):
     def real_download(self, filename, info_dict):
         self.report_destination(filename)
         tmpfilename = self.temp_name(filename)
+        self._cookies_tempfile = None
 
         try:
             started = time.time()
@@ -42,6 +46,13 @@ class ExternalFD(FileDownloader):
             # should take place
             retval = 0
             self.to_screen('[%s] Interrupted by user' % self.get_basename())
+        finally:
+            if self._cookies_tempfile and os.path.isfile(self._cookies_tempfile):
+                try:
+                    os.remove(self._cookies_tempfile)
+                except OSError:
+                    self.report_warning(
+                        'Unable to delete temporary cookies file "{0}"'.format(self._cookies_tempfile))
 
         if retval == 0:
             status = {
@@ -97,6 +108,16 @@ class ExternalFD(FileDownloader):
     def _configuration_args(self, default=[]):
         return cli_configuration_args(self.params, 'external_downloader_args', default)
 
+    def _write_cookies(self):
+        if not self.ydl.cookiejar.filename:
+            tmp_cookies = tempfile.NamedTemporaryFile(suffix='.cookies', delete=False)
+            tmp_cookies.close()
+            self._cookies_tempfile = tmp_cookies.name
+            self.to_screen('[download] Writing temporary cookies file to "{0}"'.format(self._cookies_tempfile))
+        # real_download resets _cookies_tempfile; if it's None, save() will write to cookiejar.filename
+        self.ydl.cookiejar.save(self._cookies_tempfile, ignore_discard=True, ignore_expires=True)
+        return self.ydl.cookiejar.filename or self._cookies_tempfile
+
     def _call_downloader(self, tmpfilename, info_dict):
         """ Either overwrite this or implement _make_cmd """
         cmd = [encodeArgument(a) for a in self._make_cmd(tmpfilename, info_dict)]
@@ -110,13 +131,21 @@ class ExternalFD(FileDownloader):
             self.to_stderr(stderr.decode('utf-8', 'replace'))
         return p.returncode
 
+    @staticmethod
+    def _header_items(info_dict):
+        return traverse_obj(
+            info_dict, ('http_headers', T(dict.items), Ellipsis))
+
 
 class CurlFD(ExternalFD):
     AVAILABLE_OPT = '-V'
 
     def _make_cmd(self, tmpfilename, info_dict):
-        cmd = [self.exe, '--location', '-o', tmpfilename]
-        for key, val in info_dict['http_headers'].items():
+        cmd = [self.exe, '--location', '-o', tmpfilename, '--compressed']
+        cookie_header = self.ydl.cookiejar.get_cookie_header(info_dict['url'])
+        if cookie_header:
+            cmd += ['--cookie', cookie_header]
+        for key, val in self._header_items(info_dict):
             cmd += ['--header', '%s: %s' % (key, val)]
         cmd += self._bool_option('--continue-at', 'continuedl', '-', '0')
         cmd += self._valueless_option('--silent', 'noprogress')
@@ -151,8 +180,11 @@ class AxelFD(ExternalFD):
 
     def _make_cmd(self, tmpfilename, info_dict):
         cmd = [self.exe, '-o', tmpfilename]
-        for key, val in info_dict['http_headers'].items():
+        for key, val in self._header_items(info_dict):
             cmd += ['-H', '%s: %s' % (key, val)]
+        cookie_header = self.ydl.cookiejar.get_cookie_header(info_dict['url'])
+        if cookie_header:
+            cmd += ['-H', 'Cookie: {0}'.format(cookie_header), '--max-redirect=0']
         cmd += self._configuration_args()
         cmd += ['--', info_dict['url']]
         return cmd
@@ -162,8 +194,10 @@ class WgetFD(ExternalFD):
     AVAILABLE_OPT = '--version'
 
     def _make_cmd(self, tmpfilename, info_dict):
-        cmd = [self.exe, '-O', tmpfilename, '-nv', '--no-cookies']
-        for key, val in info_dict['http_headers'].items():
+        cmd = [self.exe, '-O', tmpfilename, '-nv', '--compression=auto']
+        if self.ydl.cookiejar.get_cookie_header(info_dict['url']):
+            cmd += ['--load-cookies', self._write_cookies()]
+        for key, val in self._header_items(info_dict):
             cmd += ['--header', '%s: %s' % (key, val)]
         cmd += self._option('--limit-rate', 'ratelimit')
         retry = self._option('--tries', 'retries')
@@ -182,20 +216,57 @@ class WgetFD(ExternalFD):
 class Aria2cFD(ExternalFD):
     AVAILABLE_OPT = '-v'
 
+    @staticmethod
+    def _aria2c_filename(fn):
+        return fn if os.path.isabs(fn) else os.path.join('.', fn)
+
     def _make_cmd(self, tmpfilename, info_dict):
-        cmd = [self.exe, '-c']
-        cmd += self._configuration_args([
-            '--min-split-size', '1M', '--max-connection-per-server', '4'])
-        dn = os.path.dirname(tmpfilename)
-        if dn:
-            cmd += ['--dir', dn]
-        cmd += ['--out', os.path.basename(tmpfilename)]
-        for key, val in info_dict['http_headers'].items():
+        cmd = [self.exe, '-c',
+               '--console-log-level=warn', '--summary-interval=0', '--download-result=hide',
+               '--http-accept-gzip=true', '--file-allocation=none', '-x16', '-j16', '-s16']
+        if 'fragments' in info_dict:
+            cmd += ['--allow-overwrite=true', '--allow-piece-length-change=true']
+        else:
+            cmd += ['--min-split-size', '1M']
+
+        if self.ydl.cookiejar.get_cookie_header(info_dict['url']):
+            cmd += ['--load-cookies={0}'.format(self._write_cookies())]
+        for key, val in self._header_items(info_dict):
             cmd += ['--header', '%s: %s' % (key, val)]
+        cmd += self._configuration_args(['--max-connection-per-server', '4'])
+        cmd += ['--out', os.path.basename(tmpfilename)]
+        cmd += self._option('--max-overall-download-limit', 'ratelimit')
         cmd += self._option('--interface', 'source_address')
         cmd += self._option('--all-proxy', 'proxy')
         cmd += self._bool_option('--check-certificate', 'nocheckcertificate', 'false', 'true', '=')
         cmd += self._bool_option('--remote-time', 'updatetime', 'true', 'false', '=')
+        cmd += self._bool_option('--show-console-readout', 'noprogress', 'false', 'true', '=')
+        cmd += self._configuration_args()
+
+        # aria2c strips out spaces from the beginning/end of filenames and paths.
+        # We work around this issue by adding a "./" to the beginning of the
+        # filename and relative path, and adding a "/" at the end of the path.
+        # See: https://github.com/yt-dlp/yt-dlp/issues/276
+        # https://github.com/ytdl-org/youtube-dl/issues/20312
+        # https://github.com/aria2/aria2/issues/1373
+        dn = os.path.dirname(tmpfilename)
+        if dn:
+            cmd += ['--dir', self._aria2c_filename(dn) + os.path.sep]
+        if 'fragments' not in info_dict:
+            cmd += ['--out', self._aria2c_filename(os.path.basename(tmpfilename))]
+        cmd += ['--auto-file-renaming=false']
+        if 'fragments' in info_dict:
+            cmd += ['--file-allocation=none', '--uri-selector=inorder']
+            url_list_file = '%s.frag.urls' % (tmpfilename, )
+            url_list = []
+            for frag_index, fragment in enumerate(info_dict['fragments']):
+                fragment_filename = '%s-Frag%d' % (os.path.basename(tmpfilename), frag_index)
+                url_list.append('%s\n\tout=%s' % (fragment['url'], self._aria2c_filename(fragment_filename)))
+            stream, _ = self.sanitize_open(url_list_file, 'wb')
+            stream.write('\n'.join(url_list).encode())
+            stream.close()
+            cmd += ['-i', self._aria2c_filename(url_list_file)]
+        else:
             cmd += ['--', info_dict['url']]
         return cmd
 
@@ -235,8 +306,10 @@ class Aria2pFD(ExternalFD):
         }
         options['dir'] = os.path.dirname(tmpfilename) or os.path.abspath('.')
         options['out'] = os.path.basename(tmpfilename)
+        if self.ydl.cookiejar.get_cookie_header(info_dict['url']):
+            options['load-cookies'] = self._write_cookies()
         options['header'] = []
-        for key, val in info_dict['http_headers'].items():
+        for key, val in self._header_items(info_dict):
             options['header'].append('{0}: {1}'.format(key, val))
         download = aria2.add_uris([info_dict['url']], options)
         status = {
@@ -265,8 +338,16 @@ class HttpieFD(ExternalFD):
 
     def _make_cmd(self, tmpfilename, info_dict):
         cmd = ['http', '--download', '--output', tmpfilename, info_dict['url']]
-        for key, val in info_dict['http_headers'].items():
+        for key, val in self._header_items(info_dict):
             cmd += ['%s:%s' % (key, val)]
+
+        # httpie 3.1.0+ removes the Cookie header on redirect, so this should be safe for now. [1]
+        # If we ever need cookie handling for redirects, we can export the cookiejar into a session. [2]
+        # 1: https://github.com/httpie/httpie/security/advisories/GHSA-9w4w-cpc8-h2fq
+        # 2: https://httpie.io/docs/cli/sessions
+        cookie_header = self.ydl.cookiejar.get_cookie_header(info_dict['url'])
+        if cookie_header:
+            cmd += ['Cookie:%s' % cookie_header]
         return cmd
 
 
@@ -312,7 +393,14 @@ class FFmpegFD(ExternalFD):
         # if end_time:
         #     args += ['-t', compat_str(end_time - start_time)]
 
-        if info_dict['http_headers'] and re.match(r'^https?://', url):
+        cookies = self.ydl.cookiejar.get_cookies_for_url(url)
+        if cookies:
+            args.extend(['-cookies', ''.join(
+                '{0}={1}; path={2}; domain={3};\r\n'.format(
+                    cookie.name, cookie.value, cookie.path, cookie.domain)
+                for cookie in cookies)])
+
+        if info_dict.get('http_headers') and re.match(r'^https?://', url):
             # Trailing \r\n after each HTTP header is important to prevent warning from ffmpeg/avconv:
             # [http @ 00000000003d2fa0] No trailing CRLF found in HTTP header.
             headers = handle_youtubedl_headers(info_dict['http_headers'])

youtube_dl/jsinterp.py

@@ -280,16 +280,16 @@ class JSInterpreter(object):
             # make Py 2.6 conform to its lying documentation
             if name == 'flags':
                 self.flags = self.__flags
+                return self.flags
             elif name == 'pattern':
                 self.pattern = self.__pattern_txt
+                return self.pattern
+            elif hasattr(self.__self, name):
+                v = getattr(self.__self, name)
+                setattr(self, name, v)
+                return v
             elif name in ('groupindex', 'groups'):
-                # in case these get set after a match?
-                if hasattr(self.__self, name):
-                    setattr(self, name, getattr(self.__self, name))
-                else:
                 return 0 if name == 'groupindex' else {}
-            if hasattr(self, name):
-                return getattr(self, name)
             raise AttributeError('{0} has no attribute named {1}'.format(self, name))
 
         @classmethod

youtube_dl/options.py

@@ -544,12 +544,14 @@ def parseOpts(overrideArguments=None):
     workarounds.add_option(
         '--referer',
         metavar='URL', dest='referer', default=None,
-        help='Specify a custom referer, use if the video access is restricted to one domain',
+        help='Specify a custom Referer: use if the video access is restricted to one domain',
     )
     workarounds.add_option(
         '--add-header',
         metavar='FIELD:VALUE', dest='headers', action='append',
-        help='Specify a custom HTTP header and its value, separated by a colon \':\'. You can use this option multiple times',
+        help=('Specify a custom HTTP header and its value, separated by a colon \':\'. You can use this option multiple times. '
+              'NB Use --cookies rather than adding a Cookie header if its contents may be sensitive; '
+              'data from a Cookie header will be sent to all domains, not just the one intended')
     )
     workarounds.add_option(
         '--bidi-workaround',

youtube_dl/utils.py

@@ -16,6 +16,7 @@ import email.header
 import errno
 import functools
 import gzip
+import inspect
 import io
 import itertools
 import json
@@ -40,7 +41,6 @@ import zlib
 from .compat import (
     compat_HTMLParseError,
     compat_HTMLParser,
-    compat_HTTPError,
     compat_basestring,
     compat_casefold,
     compat_chr,
@@ -63,6 +63,7 @@ from .compat import (
     compat_struct_pack,
     compat_struct_unpack,
     compat_urllib_error,
+    compat_urllib_HTTPError,
     compat_urllib_parse,
     compat_urllib_parse_parse_qs as compat_parse_qs,
     compat_urllib_parse_urlencode,
@@ -2613,7 +2614,8 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
 
     Part of this code was copied from:
 
-    http://techknack.net/python-urllib2-handlers/
+    http://techknack.net/python-urllib2-handlers/, archived at
+    https://web.archive.org/web/20130527205558/http://techknack.net/python-urllib2-handlers/
 
     Andrew Rowls, the author of that code, agreed to release it to the
     public domain.
@@ -2671,7 +2673,9 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
             req._Request__original = req._Request__original.partition('#')[0]
             req._Request__r_type = req._Request__r_type.partition('#')[0]
 
-        return req
+        # Use the totally undocumented AbstractHTTPHandler per
+        # https://github.com/yt-dlp/yt-dlp/pull/4158
+        return compat_urllib_request.AbstractHTTPHandler.do_request_(self, req)
 
     def http_response(self, req, resp):
         old_resp = resp
@@ -2682,7 +2686,7 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
             try:
                 uncompressed = io.BytesIO(gz.read())
             except IOError as original_ioerror:
-                # There may be junk add the end of the file
+                # There may be junk at the end of the file
                 # See http://stackoverflow.com/q/4928560/35070 for details
                 for i in range(1, 1024):
                     try:
@@ -2709,8 +2713,7 @@ class YoutubeDLHandler(compat_urllib_request.HTTPHandler):
             if location:
                 # As of RFC 2616 default charset is iso-8859-1 that is respected by python 3
                 if sys.version_info >= (3, 0):
-                    location = location.encode('iso-8859-1').decode('utf-8')
-                else:
+                    location = location.encode('iso-8859-1')
                 location = location.decode('utf-8')
                 location_escaped = escape_url(location)
                 if location != location_escaped:
@@ -2909,6 +2912,19 @@ class YoutubeDLCookieJar(compat_cookiejar.MozillaCookieJar):
                 cookie.expires = None
                 cookie.discard = True
 
+    def get_cookie_header(self, url):
+        """Generate a Cookie HTTP header for a given url"""
+        cookie_req = sanitized_Request(url)
+        self.add_cookie_header(cookie_req)
+        return cookie_req.get_header('Cookie')
+
+    def get_cookies_for_url(self, url):
+        """Generate a list of Cookie objects for a given url"""
+        # Policy `_now` attribute must be set before calling `_cookies_for_request`
+        # Ref: https://github.com/python/cpython/blob/3.7/Lib/http/cookiejar.py#L1360
+        self._policy._now = self._now = int(time.time())
+        return self._cookies_for_request(sanitized_Request(url))
+
 
 class YoutubeDLCookieProcessor(compat_urllib_request.HTTPCookieProcessor):
     def __init__(self, cookiejar=None):
@@ -2939,17 +2955,16 @@ class YoutubeDLRedirectHandler(compat_urllib_request.HTTPRedirectHandler):
 
     The code is based on HTTPRedirectHandler implementation from CPython [1].
 
-    This redirect handler solves two issues:
-     - ensures redirect URL is always unicode under python 2
-     - introduces support for experimental HTTP response status code
-       308 Permanent Redirect [2] used by some sites [3]
+    This redirect handler fixes and improves the logic to better align with RFC7261
+    and what browsers tend to do [2][3]
 
     1. https://github.com/python/cpython/blob/master/Lib/urllib/request.py
-    2. https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/308
-    3. https://github.com/ytdl-org/youtube-dl/issues/28768
+    2. https://datatracker.ietf.org/doc/html/rfc7231
+    3. https://github.com/python/cpython/issues/91306
     """
 
-    http_error_301 = http_error_303 = http_error_307 = http_error_308 = compat_urllib_request.HTTPRedirectHandler.http_error_302
+    # Supply possibly missing alias
+    http_error_308 = compat_urllib_request.HTTPRedirectHandler.http_error_302
 
     def redirect_request(self, req, fp, code, msg, headers, newurl):
         """Return a Request or None in response to a redirect.
@@ -2961,19 +2976,15 @@ class YoutubeDLRedirectHandler(compat_urllib_request.HTTPRedirectHandler):
         else should try to handle this url.  Return None if you can't
         but another Handler might.
         """
-        m = req.get_method()
-        if (not (code in (301, 302, 303, 307, 308) and m in ("GET", "HEAD")
-                 or code in (301, 302, 303) and m == "POST")):
-            raise compat_HTTPError(req.full_url, code, msg, headers, fp)
-        # Strictly (according to RFC 2616), 301 or 302 in response to
-        # a POST MUST NOT cause a redirection without confirmation
-        # from the user (of urllib.request, in this case).  In practice,
-        # essentially all clients do redirect in this case, so we do
-        # the same.
+        if code not in (301, 302, 303, 307, 308):
+            raise compat_urllib_HTTPError(req.full_url, code, msg, headers, fp)
+
+        new_method = req.get_method()
+        new_data = req.data
 
         # On python 2 urlh.geturl() may sometimes return redirect URL
-        # as byte string instead of unicode. This workaround allows
-        # to force it always return unicode.
+        # as a byte string instead of unicode. This workaround forces
+        # it to return unicode.
         if sys.version_info[0] < 3:
             newurl = compat_str(newurl)
 
@@ -2982,13 +2993,34 @@ class YoutubeDLRedirectHandler(compat_urllib_request.HTTPRedirectHandler):
         # but it is kept for compatibility with other callers.
         newurl = newurl.replace(' ', '%20')
 
-        CONTENT_HEADERS = ("content-length", "content-type")
+        # Technically the Cookie header should be in unredirected_hdrs;
+        # however in practice some may set it in normal headers anyway.
+        # We will remove it here to prevent any leaks.
+        remove_headers = ['Cookie']
+
+        # A 303 must either use GET or HEAD for subsequent request
+        # https://datatracker.ietf.org/doc/html/rfc7231#section-6.4.4
+        if code == 303 and req.get_method() != 'HEAD':
+            new_method = 'GET'
+        # 301 and 302 redirects are commonly turned into a GET from a POST
+        # for subsequent requests by browsers, so we'll do the same.
+        # https://datatracker.ietf.org/doc/html/rfc7231#section-6.4.2
+        # https://datatracker.ietf.org/doc/html/rfc7231#section-6.4.3
+        elif code in (301, 302) and req.get_method() == 'POST':
+            new_method = 'GET'
+
+        # only remove payload if method changed (e.g. POST to GET)
+        if new_method != req.get_method():
+            new_data = None
+            remove_headers.extend(['Content-Length', 'Content-Type'])
+
         # NB: don't use dict comprehension for python 2.6 compatibility
-        newheaders = dict((k, v) for k, v in req.headers.items()
-                          if k.lower() not in CONTENT_HEADERS)
+        new_headers = dict((k, v) for k, v in req.header_items()
+                           if k.title() not in remove_headers)
+
         return compat_urllib_request.Request(
-            newurl, headers=newheaders, origin_req_host=req.origin_req_host,
-            unverifiable=True)
+            newurl, headers=new_headers, origin_req_host=req.origin_req_host,
+            unverifiable=True, method=new_method, data=new_data)
 
 
 def extract_timezone(date_str):
@@ -3881,7 +3913,7 @@ def detect_exe_version(output, version_re=None, unrecognized='present'):
         return unrecognized
 
 
-class LazyList(compat_collections_abc.Sequence):
+class LazyList(compat_collections_abc.Iterable):
     """Lazy immutable list from an iterable
     Note that slices of a LazyList are lists and not LazyList"""
 
@@ -4223,10 +4255,16 @@ def multipart_encode(data, boundary=None):
     return out, content_type
 
 
-def variadic(x, allowed_types=(compat_str, bytes, dict)):
-    if not isinstance(allowed_types, tuple) and isinstance(allowed_types, compat_collections_abc.Iterable):
+def is_iterable_like(x, allowed_types=compat_collections_abc.Iterable, blocked_types=NO_DEFAULT):
+    if blocked_types is NO_DEFAULT:
+        blocked_types = (compat_str, bytes, compat_collections_abc.Mapping)
+    return isinstance(x, allowed_types) and not isinstance(x, blocked_types)
+
+
+def variadic(x, allowed_types=NO_DEFAULT):
+    if isinstance(allowed_types, compat_collections_abc.Iterable):
         allowed_types = tuple(allowed_types)
-    return x if isinstance(x, compat_collections_abc.Iterable) and not isinstance(x, allowed_types) else (x,)
+    return x if is_iterable_like(x, blocked_types=allowed_types) else (x,)
 
 
 def dict_get(d, key_or_keys, default=None, skip_false_values=True):
@@ -5993,7 +6031,7 @@ def clean_podcast_url(url):
 
 def traverse_obj(obj, *paths, **kwargs):
     """
-    Safely traverse nested `dict`s and `Sequence`s
+    Safely traverse nested `dict`s and `Iterable`s
 
     >>> obj = [{}, {"key": "value"}]
     >>> traverse_obj(obj, (1, "key"))
@@ -6001,14 +6039,17 @@ def traverse_obj(obj, *paths, **kwargs):
 
     Each of the provided `paths` is tested and the first producing a valid result will be returned.
     The next path will also be tested if the path branched but no results could be found.
-    Supported values for traversal are `Mapping`, `Sequence` and `re.Match`.
-    A value of None is treated as the absence of a value.
+    Supported values for traversal are `Mapping`, `Iterable` and `re.Match`.
+    Unhelpful values (`{}`, `None`) are treated as the absence of a value and discarded.
 
     The paths will be wrapped in `variadic`, so that `'key'` is conveniently the same as `('key', )`.
 
     The keys in the path can be one of:
         - `None`:           Return the current object.
-        - `str`/`int`:      Return `obj[key]`. For `re.Match, return `obj.group(key)`.
+        - `set`:            Requires the only item in the set to be a type or function,
+                            like `{type}`/`{func}`. If a `type`, returns only values
+                            of this type. If a function, returns `func(obj)`.
+        - `str`/`int`:      Return `obj[key]`. For `re.Match`, return `obj.group(key)`.
         - `slice`:          Branch out and return all values in `obj[key]`.
         - `Ellipsis`:       Branch out and return a list of all values.
         - `tuple`/`list`:   Branch out and return a list of all matching values.
@@ -6016,6 +6057,9 @@ def traverse_obj(obj, *paths, **kwargs):
         - `function`:       Branch out and return values filtered by the function.
                             Read as: `[value for key, value in obj if function(key, value)]`.
                             For `Sequence`s, `key` is the index of the value.
+                            For `Iterable`s, `key` is the enumeration count of the value.
+                            For `re.Match`es, `key` is the group number (0 = full match)
+                            as well as additionally any group names, if given.
         - `dict`            Transform the current object and return a matching dict.
                             Read as: `{key: traverse_obj(obj, path) for key, path in dct.items()}`.
 
@@ -6024,8 +6068,12 @@ def traverse_obj(obj, *paths, **kwargs):
     @params paths           Paths which to traverse by.
     Keyword arguments:
     @param default          Value to return if the paths do not match.
+                            If the last key in the path is a `dict`, it will apply to each value inside
+                            the dict instead, depth first. Try to avoid if using nested `dict` keys.
     @param expected_type    If a `type`, only accept final values of this type.
                             If any other callable, try to call the function on each result.
+                            If the last key in the path is a `dict`, it will apply to each value inside
+                            the dict instead, recursively. This does respect branching paths.
     @param get_all          If `False`, return the first matching result, otherwise all matching ones.
     @param casesense        If `False`, consider string dictionary keys as case insensitive.
 
@@ -6036,12 +6084,15 @@ def traverse_obj(obj, *paths, **kwargs):
     @param _traverse_string  Whether to traverse into objects as strings.
                             If `True`, any non-compatible object will first be
                             converted into a string and then traversed into.
+                            The return value of that path will be a string instead,
+                            not respecting any further branching.
 
 
     @returns                The result of the object traversal.
                             If successful, `get_all=True`, and the path branches at least once,
                             then a list of results is returned instead.
                             A list is always returned if the last path branches and no `default` is given.
+                            If a path ends on a `dict` that result will always be a `dict`.
     """
 
     # parameter defaults
@@ -6055,7 +6106,6 @@ def traverse_obj(obj, *paths, **kwargs):
     # instant compat
     str = compat_str
 
-    is_sequence = lambda x: isinstance(x, compat_collections_abc.Sequence) and not isinstance(x, (str, bytes))
     casefold = lambda k: compat_casefold(k) if isinstance(k, str) else k
 
     if isinstance(expected_type, type):
@@ -6063,128 +6113,184 @@ def traverse_obj(obj, *paths, **kwargs):
     else:
         type_test = lambda val: try_call(expected_type or IDENTITY, args=(val,))
 
+    def lookup_or_none(v, k, getter=None):
+        try:
+            return getter(v, k) if getter else v[k]
+        except IndexError:
+            return None
+
     def from_iterable(iterables):
         # chain.from_iterable(['ABC', 'DEF']) --> A B C D E F
         for it in iterables:
             for item in it:
                 yield item
 
-    def apply_key(key, obj):
-        if obj is None:
-            return
+    def apply_key(key, obj, is_last):
+        branching = False
+
+        if obj is None and _traverse_string:
+            if key is Ellipsis or callable(key) or isinstance(key, slice):
+                branching = True
+                result = ()
+            else:
+                result = None
 
         elif key is None:
-            yield obj
+            result = obj
+
+        elif isinstance(key, set):
+            assert len(key) == 1, 'Set should only be used to wrap a single item'
+            item = next(iter(key))
+            if isinstance(item, type):
+                result = obj if isinstance(obj, item) else None
+            else:
+                result = try_call(item, args=(obj,))
 
         elif isinstance(key, (list, tuple)):
-            for branch in key:
-                _, result = apply_path(obj, branch)
-                for item in result:
-                    yield item
+            branching = True
+            result = from_iterable(
+                apply_path(obj, branch, is_last)[0] for branch in key)
 
         elif key is Ellipsis:
-            result = []
+            branching = True
             if isinstance(obj, compat_collections_abc.Mapping):
                 result = obj.values()
-            elif is_sequence(obj):
+            elif is_iterable_like(obj):
                 result = obj
             elif isinstance(obj, compat_re_Match):
                 result = obj.groups()
             elif _traverse_string:
+                branching = False
                 result = str(obj)
-            for item in result:
-                yield item
+            else:
+                result = ()
 
         elif callable(key):
-            if is_sequence(obj):
-                iter_obj = enumerate(obj)
-            elif isinstance(obj, compat_collections_abc.Mapping):
+            branching = True
+            if isinstance(obj, compat_collections_abc.Mapping):
                 iter_obj = obj.items()
+            elif is_iterable_like(obj):
+                iter_obj = enumerate(obj)
             elif isinstance(obj, compat_re_Match):
-                iter_obj = enumerate(itertools.chain([obj.group()], obj.groups()))
+                iter_obj = itertools.chain(
+                    enumerate(itertools.chain((obj.group(),), obj.groups())),
+                    obj.groupdict().items())
             elif _traverse_string:
+                branching = False
                 iter_obj = enumerate(str(obj))
             else:
-                return
-            for item in (v for k, v in iter_obj if try_call(key, args=(k, v))):
-                yield item
+                iter_obj = ()
+
+            result = (v for k, v in iter_obj if try_call(key, args=(k, v)))
+            if not branching:  # string traversal
+                result = ''.join(result)
 
         elif isinstance(key, dict):
-            iter_obj = ((k, _traverse_obj(obj, v)) for k, v in key.items())
-            yield dict((k, v if v is not None else default) for k, v in iter_obj
-                       if v is not None or default is not NO_DEFAULT)
+            iter_obj = ((k, _traverse_obj(obj, v, False, is_last)) for k, v in key.items())
+            result = dict((k, v if v is not None else default) for k, v in iter_obj
+                          if v is not None or default is not NO_DEFAULT) or None
 
         elif isinstance(obj, compat_collections_abc.Mapping):
-            yield (obj.get(key) if casesense or (key in obj)
+            result = (try_call(obj.get, args=(key,))
+                      if casesense or try_call(obj.__contains__, args=(key,))
                       else next((v for k, v in obj.items() if casefold(k) == key), None))
 
         elif isinstance(obj, compat_re_Match):
+            result = None
             if isinstance(key, int) or casesense:
-                try:
-                    yield obj.group(key)
-                    return
-                except IndexError:
-                    pass
-            if not isinstance(key, str):
-                return
+                # Py 2.6 doesn't have methods in the Match class/type
+                result = lookup_or_none(obj, key, getter=lambda _, k: obj.group(k))
 
-            yield next((v for k, v in obj.groupdict().items() if casefold(k) == key), None)
+            elif isinstance(key, str):
+                result = next((v for k, v in obj.groupdict().items()
+                              if casefold(k) == key), None)
 
         else:
-            if _is_user_input:
-                key = (int_or_none(key) if ':' not in key
-                       else slice(*map(int_or_none, key.split(':'))))
+            result = None
+            if isinstance(key, (int, slice)):
+                if is_iterable_like(obj, compat_collections_abc.Sequence):
+                    branching = isinstance(key, slice)
+                    result = lookup_or_none(obj, key)
+                elif _traverse_string:
+                    result = lookup_or_none(str(obj), key)
 
-            if not isinstance(key, (int, slice)):
+        return branching, result if branching else (result,)
+
+    def lazy_last(iterable):
+        iterator = iter(iterable)
+        prev = next(iterator, NO_DEFAULT)
+        if prev is NO_DEFAULT:
             return
 
-            if not is_sequence(obj):
-                if not _traverse_string:
-                    return
-                obj = str(obj)
+        for item in iterator:
+            yield False, prev
+            prev = item
 
-            try:
-                yield obj[key]
-            except IndexError:
-                pass
+        yield True, prev
 
-    def apply_path(start_obj, path):
+    def apply_path(start_obj, path, test_type):
         objs = (start_obj,)
         has_branched = False
 
-        for key in variadic(path):
-            if _is_user_input and key == ':':
+        key = None
+        for last, key in lazy_last(variadic(path, (str, bytes, dict, set))):
+            if _is_user_input and isinstance(key, str):
+                if key == ':':
                     key = Ellipsis
+                elif ':' in key:
+                    key = slice(*map(int_or_none, key.split(':')))
+                elif int_or_none(key) is not None:
+                    key = int(key)
 
             if not casesense and isinstance(key, str):
                 key = compat_casefold(key)
 
-            if key is Ellipsis or isinstance(key, (list, tuple)) or callable(key):
-                has_branched = True
+            if __debug__ and callable(key):
+                # Verify function signature
+                args = inspect.getargspec(key)
+                if len(args.args) != 2:
+                    # crash differently in 2.6 !
+                    inspect.getcallargs(key, None, None)
 
-            key_func = functools.partial(apply_key, key)
-            objs = from_iterable(map(key_func, objs))
+            new_objs = []
+            for obj in objs:
+                branching, results = apply_key(key, obj, last)
+                has_branched |= branching
+                new_objs.append(results)
 
-        return has_branched, objs
+            objs = from_iterable(new_objs)
 
-    def _traverse_obj(obj, path, use_list=True):
-        has_branched, results = apply_path(obj, path)
-        results = LazyList(x for x in map(type_test, results) if x is not None)
+        if test_type and not isinstance(key, (dict, list, tuple)):
+            objs = map(type_test, objs)
+
+        return objs, has_branched, isinstance(key, dict)
+
+    def _traverse_obj(obj, path, allow_empty, test_type):
+        results, has_branched, is_dict = apply_path(obj, path, test_type)
+        results = LazyList(x for x in results if x not in (None, {}))
 
         if get_all and has_branched:
-            return results.exhaust() if results or use_list else None
+            if results:
+                return results.exhaust()
+            if allow_empty:
+                return [] if default is NO_DEFAULT else default
+            return None
 
-        return results[0] if results else None
+        return results[0] if results else {} if allow_empty and is_dict else None
 
     for index, path in enumerate(paths, 1):
-        use_list = default is NO_DEFAULT and index == len(paths)
-        result = _traverse_obj(obj, path, use_list)
+        result = _traverse_obj(obj, path, index == len(paths), True)
         if result is not None:
             return result
 
     return None if default is NO_DEFAULT else default
 
 
+def T(x):
+    """ For use in yt-dl instead of {type} or set((type,)) """
+    return set((x,))
+
+
 def get_first(obj, keys, **kwargs):
     return traverse_obj(obj, (Ellipsis,) + tuple(variadic(keys)), get_all=False, **kwargs)