[core] Improve HTTP redirect handling (#7094)
Aligns HTTP redirect handling with what browsers commonly do and RFC standards.
Fixes issues afac4caa7d missed.
Authored by: coletdjnz
This commit is contained in:
coletdjnz
GitHub
parent
66468bbf49
commit
08916a49c7
3 changed files with 281 additions and 72 deletions
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@ -10,7 +10,6 @@ sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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import copy
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import json
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import urllib.error
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from test.helper import FakeYDL, assertRegexpMatches
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from yt_dlp import YoutubeDL
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@ -1097,11 +1096,6 @@ class TestYoutubeDL(unittest.TestCase):
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test_selection({'playlist_items': '-15::2'}, INDICES[1::2], True)
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test_selection({'playlist_items': '-15::15'}, [], True)
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def test_urlopen_no_file_protocol(self):
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# see https://github.com/ytdl-org/youtube-dl/issues/8227
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ydl = YDL()
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self.assertRaises(urllib.error.URLError, ydl.urlopen, 'file:///etc/passwd')
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def test_do_not_override_ie_key_in_url_transparent(self):
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ydl = YDL()
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@ -7,40 +7,163 @@ import unittest
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sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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import gzip
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import http.cookiejar
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import http.server
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import io
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import pathlib
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import ssl
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import tempfile
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import threading
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import urllib.error
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import urllib.request
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from test.helper import http_server_port
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from yt_dlp import YoutubeDL
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from yt_dlp.utils import sanitized_Request, urlencode_postdata
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from .helper import FakeYDL
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TEST_DIR = os.path.dirname(os.path.abspath(__file__))
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class HTTPTestRequestHandler(http.server.BaseHTTPRequestHandler):
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protocol_version = 'HTTP/1.1'
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def log_message(self, format, *args):
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pass
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def _headers(self):
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payload = str(self.headers).encode('utf-8')
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self.send_response(200)
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self.send_header('Content-Type', 'application/json')
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self.send_header('Content-Length', str(len(payload)))
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self.end_headers()
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self.wfile.write(payload)
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def _redirect(self):
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self.send_response(int(self.path[len('/redirect_'):]))
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self.send_header('Location', '/method')
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self.send_header('Content-Length', '0')
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self.end_headers()
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def _method(self, method, payload=None):
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self.send_response(200)
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self.send_header('Content-Length', str(len(payload or '')))
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self.send_header('Method', method)
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self.end_headers()
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if payload:
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self.wfile.write(payload)
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def _status(self, status):
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payload = f'<html>{status} NOT FOUND</html>'.encode()
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self.send_response(int(status))
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self.send_header('Content-Type', 'text/html; charset=utf-8')
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self.send_header('Content-Length', str(len(payload)))
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self.end_headers()
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self.wfile.write(payload)
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def _read_data(self):
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if 'Content-Length' in self.headers:
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return self.rfile.read(int(self.headers['Content-Length']))
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def do_POST(self):
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data = self._read_data()
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if self.path.startswith('/redirect_'):
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self._redirect()
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elif self.path.startswith('/method'):
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self._method('POST', data)
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elif self.path.startswith('/headers'):
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self._headers()
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else:
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self._status(404)
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def do_HEAD(self):
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if self.path.startswith('/redirect_'):
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self._redirect()
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elif self.path.startswith('/method'):
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self._method('HEAD')
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else:
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self._status(404)
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def do_PUT(self):
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data = self._read_data()
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if self.path.startswith('/redirect_'):
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self._redirect()
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elif self.path.startswith('/method'):
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self._method('PUT', data)
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else:
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self._status(404)
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def do_GET(self):
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if self.path == '/video.html':
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payload = b'<html><video src="/vid.mp4" /></html>'
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self.send_response(200)
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self.send_header('Content-Type', 'text/html; charset=utf-8')
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self.send_header('Content-Length', str(len(payload))) # required for persistent connections
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self.end_headers()
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self.wfile.write(b'<html><video src="/vid.mp4" /></html>')
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self.wfile.write(payload)
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elif self.path == '/vid.mp4':
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payload = b'\x00\x00\x00\x00\x20\x66\x74[video]'
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self.send_response(200)
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self.send_header('Content-Type', 'video/mp4')
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self.send_header('Content-Length', str(len(payload)))
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self.end_headers()
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self.wfile.write(b'\x00\x00\x00\x00\x20\x66\x74[video]')
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self.wfile.write(payload)
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elif self.path == '/%E4%B8%AD%E6%96%87.html':
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payload = b'<html><video src="/vid.mp4" /></html>'
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self.send_response(200)
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self.send_header('Content-Type', 'text/html; charset=utf-8')
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self.send_header('Content-Length', str(len(payload)))
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self.end_headers()
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self.wfile.write(payload)
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elif self.path == '/%c7%9f':
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payload = b'<html><video src="/vid.mp4" /></html>'
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self.send_response(200)
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self.send_header('Content-Type', 'text/html; charset=utf-8')
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self.send_header('Content-Length', str(len(payload)))
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self.end_headers()
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self.wfile.write(payload)
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elif self.path.startswith('/redirect_'):
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self._redirect()
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elif self.path.startswith('/method'):
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self._method('GET')
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elif self.path.startswith('/headers'):
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self._headers()
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elif self.path == '/trailing_garbage':
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payload = b'<html><video src="/vid.mp4" /></html>'
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self.send_response(200)
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self.send_header('Content-Type', 'text/html; charset=utf-8')
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self.send_header('Content-Encoding', 'gzip')
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buf = io.BytesIO()
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with gzip.GzipFile(fileobj=buf, mode='wb') as f:
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f.write(payload)
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compressed = buf.getvalue() + b'trailing garbage'
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self.send_header('Content-Length', str(len(compressed)))
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self.end_headers()
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self.wfile.write(compressed)
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elif self.path == '/302-non-ascii-redirect':
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new_url = f'http://127.0.0.1:{http_server_port(self.server)}/中文.html'
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self.send_response(301)
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self.send_header('Location', new_url)
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self.send_header('Content-Length', '0')
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self.end_headers()
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self.wfile.write(b'<html><video src="/vid.mp4" /></html>')
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else:
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assert False
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self._status(404)
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def send_header(self, keyword, value):
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"""
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Forcibly allow HTTP server to send non percent-encoded non-ASCII characters in headers.
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This is against what is defined in RFC 3986, however we need to test we support this
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since some sites incorrectly do this.
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"""
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if keyword.lower() == 'connection':
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return super().send_header(keyword, value)
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if not hasattr(self, '_headers_buffer'):
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self._headers_buffer = []
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self._headers_buffer.append(f'{keyword}: {value}\r\n'.encode())
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class FakeLogger:
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@ -56,36 +179,128 @@ class FakeLogger:
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class TestHTTP(unittest.TestCase):
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def setUp(self):
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self.httpd = http.server.HTTPServer(
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# HTTP server
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self.http_httpd = http.server.ThreadingHTTPServer(
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('127.0.0.1', 0), HTTPTestRequestHandler)
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self.port = http_server_port(self.httpd)
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self.server_thread = threading.Thread(target=self.httpd.serve_forever)
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self.server_thread.daemon = True
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self.server_thread.start()
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self.http_port = http_server_port(self.http_httpd)
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self.http_server_thread = threading.Thread(target=self.http_httpd.serve_forever)
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# FIXME: we should probably stop the http server thread after each test
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# See: https://github.com/yt-dlp/yt-dlp/pull/7094#discussion_r1199746041
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self.http_server_thread.daemon = True
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self.http_server_thread.start()
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class TestHTTPS(unittest.TestCase):
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def setUp(self):
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# HTTPS server
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certfn = os.path.join(TEST_DIR, 'testcert.pem')
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self.httpd = http.server.HTTPServer(
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self.https_httpd = http.server.ThreadingHTTPServer(
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('127.0.0.1', 0), HTTPTestRequestHandler)
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sslctx = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
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sslctx.load_cert_chain(certfn, None)
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self.httpd.socket = sslctx.wrap_socket(self.httpd.socket, server_side=True)
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self.port = http_server_port(self.httpd)
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self.server_thread = threading.Thread(target=self.httpd.serve_forever)
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self.server_thread.daemon = True
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self.server_thread.start()
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self.https_httpd.socket = sslctx.wrap_socket(self.https_httpd.socket, server_side=True)
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self.https_port = http_server_port(self.https_httpd)
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self.https_server_thread = threading.Thread(target=self.https_httpd.serve_forever)
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self.https_server_thread.daemon = True
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self.https_server_thread.start()
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def test_nocheckcertificate(self):
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ydl = YoutubeDL({'logger': FakeLogger()})
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self.assertRaises(
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Exception,
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ydl.extract_info, 'https://127.0.0.1:%d/video.html' % self.port)
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with FakeYDL({'logger': FakeLogger()}) as ydl:
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with self.assertRaises(urllib.error.URLError):
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ydl.urlopen(sanitized_Request(f'https://127.0.0.1:{self.https_port}/headers'))
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ydl = YoutubeDL({'logger': FakeLogger(), 'nocheckcertificate': True})
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r = ydl.extract_info('https://127.0.0.1:%d/video.html' % self.port)
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self.assertEqual(r['url'], 'https://127.0.0.1:%d/vid.mp4' % self.port)
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with FakeYDL({'logger': FakeLogger(), 'nocheckcertificate': True}) as ydl:
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r = ydl.urlopen(sanitized_Request(f'https://127.0.0.1:{self.https_port}/headers'))
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self.assertEqual(r.status, 200)
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r.close()
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def test_percent_encode(self):
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with FakeYDL() as ydl:
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# Unicode characters should be encoded with uppercase percent-encoding
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res = ydl.urlopen(sanitized_Request(f'http://127.0.0.1:{self.http_port}/中文.html'))
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self.assertEqual(res.status, 200)
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res.close()
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# don't normalize existing percent encodings
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res = ydl.urlopen(sanitized_Request(f'http://127.0.0.1:{self.http_port}/%c7%9f'))
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self.assertEqual(res.status, 200)
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res.close()
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def test_unicode_path_redirection(self):
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with FakeYDL() as ydl:
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r = ydl.urlopen(sanitized_Request(f'http://127.0.0.1:{self.http_port}/302-non-ascii-redirect'))
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self.assertEqual(r.url, f'http://127.0.0.1:{self.http_port}/%E4%B8%AD%E6%96%87.html')
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r.close()
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def test_redirect(self):
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with FakeYDL() as ydl:
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def do_req(redirect_status, method):
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data = b'testdata' if method in ('POST', 'PUT') else None
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res = ydl.urlopen(sanitized_Request(
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f'http://127.0.0.1:{self.http_port}/redirect_{redirect_status}', method=method, data=data))
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return res.read().decode('utf-8'), res.headers.get('method', '')
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# A 303 must either use GET or HEAD for subsequent request
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self.assertEqual(do_req(303, 'POST'), ('', 'GET'))
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self.assertEqual(do_req(303, 'HEAD'), ('', 'HEAD'))
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self.assertEqual(do_req(303, 'PUT'), ('', 'GET'))
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# 301 and 302 turn POST only into a GET
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self.assertEqual(do_req(301, 'POST'), ('', 'GET'))
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self.assertEqual(do_req(301, 'HEAD'), ('', 'HEAD'))
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self.assertEqual(do_req(302, 'POST'), ('', 'GET'))
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self.assertEqual(do_req(302, 'HEAD'), ('', 'HEAD'))
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self.assertEqual(do_req(301, 'PUT'), ('testdata', 'PUT'))
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self.assertEqual(do_req(302, 'PUT'), ('testdata', 'PUT'))
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# 307 and 308 should not change method
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for m in ('POST', 'PUT'):
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self.assertEqual(do_req(307, m), ('testdata', m))
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self.assertEqual(do_req(308, m), ('testdata', m))
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self.assertEqual(do_req(307, 'HEAD'), ('', 'HEAD'))
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self.assertEqual(do_req(308, 'HEAD'), ('', 'HEAD'))
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# These should not redirect and instead raise an HTTPError
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for code in (300, 304, 305, 306):
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with self.assertRaises(urllib.error.HTTPError):
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do_req(code, 'GET')
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def test_content_type(self):
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# https://github.com/yt-dlp/yt-dlp/commit/379a4f161d4ad3e40932dcf5aca6e6fb9715ab28
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with FakeYDL({'nocheckcertificate': True}) as ydl:
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# method should be auto-detected as POST
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r = sanitized_Request(f'https://localhost:{self.https_port}/headers', data=urlencode_postdata({'test': 'test'}))
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headers = ydl.urlopen(r).read().decode('utf-8')
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self.assertIn('Content-Type: application/x-www-form-urlencoded', headers)
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# test http
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r = sanitized_Request(f'http://localhost:{self.http_port}/headers', data=urlencode_postdata({'test': 'test'}))
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headers = ydl.urlopen(r).read().decode('utf-8')
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self.assertIn('Content-Type: application/x-www-form-urlencoded', headers)
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def test_cookiejar(self):
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with FakeYDL() as ydl:
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ydl.cookiejar.set_cookie(http.cookiejar.Cookie(
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0, 'test', 'ytdlp', None, False, '127.0.0.1', True,
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False, '/headers', True, False, None, False, None, None, {}))
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data = ydl.urlopen(sanitized_Request(f'http://127.0.0.1:{self.http_port}/headers')).read()
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self.assertIn(b'Cookie: test=ytdlp', data)
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def test_no_compression_compat_header(self):
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with FakeYDL() as ydl:
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data = ydl.urlopen(
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sanitized_Request(
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f'http://127.0.0.1:{self.http_port}/headers',
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headers={'Youtubedl-no-compression': True})).read()
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self.assertIn(b'Accept-Encoding: identity', data)
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self.assertNotIn(b'youtubedl-no-compression', data.lower())
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def test_gzip_trailing_garbage(self):
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# https://github.com/ytdl-org/youtube-dl/commit/aa3e950764337ef9800c936f4de89b31c00dfcf5
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# https://github.com/ytdl-org/youtube-dl/commit/6f2ec15cee79d35dba065677cad9da7491ec6e6f
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with FakeYDL() as ydl:
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data = ydl.urlopen(sanitized_Request(f'http://localhost:{self.http_port}/trailing_garbage')).read().decode('utf-8')
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self.assertEqual(data, '<html><video src="/vid.mp4" /></html>')
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class TestClientCert(unittest.TestCase):
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@ -112,8 +327,8 @@ class TestClientCert(unittest.TestCase):
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'nocheckcertificate': True,
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**params,
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})
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r = ydl.extract_info('https://127.0.0.1:%d/video.html' % self.port)
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self.assertEqual(r['url'], 'https://127.0.0.1:%d/vid.mp4' % self.port)
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r = ydl.extract_info(f'https://127.0.0.1:{self.port}/video.html')
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self.assertEqual(r['url'], f'https://127.0.0.1:{self.port}/vid.mp4')
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def test_certificate_combined_nopass(self):
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self._run_test(client_certificate=os.path.join(self.certdir, 'clientwithkey.crt'))
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@ -188,5 +403,22 @@ class TestProxy(unittest.TestCase):
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self.assertEqual(response, 'normal: http://xn--fiq228c.tw/')
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class TestFileURL(unittest.TestCase):
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# See https://github.com/ytdl-org/youtube-dl/issues/8227
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def test_file_urls(self):
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tf = tempfile.NamedTemporaryFile(delete=False)
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tf.write(b'foobar')
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tf.close()
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url = pathlib.Path(tf.name).as_uri()
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with FakeYDL() as ydl:
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self.assertRaisesRegex(
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urllib.error.URLError, 'file:// URLs are explicitly disabled in yt-dlp for security reasons', ydl.urlopen, url)
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with FakeYDL({'enable_file_urls': True}) as ydl:
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res = ydl.urlopen(url)
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self.assertEqual(res.read(), b'foobar')
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res.close()
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os.unlink(tf.name)
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if __name__ == '__main__':
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unittest.main()
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@ -1664,61 +1664,44 @@ class YoutubeDLRedirectHandler(urllib.request.HTTPRedirectHandler):
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The code is based on HTTPRedirectHandler implementation from CPython [1].
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This redirect handler solves two issues:
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- ensures redirect URL is always unicode under python 2
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- introduces support for experimental HTTP response status code
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308 Permanent Redirect [2] used by some sites [3]
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This redirect handler fixes and improves the logic to better align with RFC7261
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and what browsers tend to do [2][3]
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1. https://github.com/python/cpython/blob/master/Lib/urllib/request.py
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2. https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/308
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3. https://github.com/ytdl-org/youtube-dl/issues/28768
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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 = 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.
|
||||
|
||||
This is called by the http_error_30x methods when a
|
||||
redirection response is received. If a redirection should
|
||||
take place, return a new Request to allow http_error_30x to
|
||||
perform the redirect. Otherwise, raise HTTPError if no-one
|
||||
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")):
|
||||
if code not in (301, 302, 303, 307, 308):
|
||||
raise urllib.error.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.
|
||||
|
||||
# Be conciliant with URIs containing a space. This is mainly
|
||||
# redundant with the more complete encoding done in http_error_302(),
|
||||
# but it is kept for compatibility with other callers.
|
||||
newurl = newurl.replace(' ', '%20')
|
||||
|
||||
CONTENT_HEADERS = ("content-length", "content-type")
|
||||
# NB: don't use dict comprehension for python 2.6 compatibility
|
||||
newheaders = {k: v for k, v in req.headers.items() if k.lower() not in CONTENT_HEADERS}
|
||||
|
||||
new_method = req.get_method()
|
||||
new_data = req.data
|
||||
remove_headers = []
|
||||
# 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 m != 'HEAD':
|
||||
m = 'GET'
|
||||
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
|
||||
if code in (301, 302) and m == 'POST':
|
||||
m = 'GET'
|
||||
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'])
|
||||
|
||||
new_headers = {k: v for k, v in req.headers.items() if k.lower() not in remove_headers}
|
||||
|
||||
return urllib.request.Request(
|
||||
newurl, headers=newheaders, origin_req_host=req.origin_req_host,
|
||||
unverifiable=True, method=m)
|
||||
newurl, headers=new_headers, origin_req_host=req.origin_req_host,
|
||||
unverifiable=True, method=new_method, data=new_data)
|
||||
|
||||
|
||||
def extract_timezone(date_str):
|
||||
|
|
|
|||
Loading…
Reference in a new issue