[core] Support decoding multiple content encodings (#7142)
Authored by: coletdjnz
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coletdjnz
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2 changed files with 108 additions and 29 deletions
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@ -17,9 +17,11 @@ 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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import zlib
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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.dependencies import brotli
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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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@ -148,6 +150,31 @@ class HTTPTestRequestHandler(http.server.BaseHTTPRequestHandler):
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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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elif self.path == '/content-encoding':
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encodings = self.headers.get('ytdl-encoding', '')
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payload = b'<html><video src="/vid.mp4" /></html>'
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for encoding in filter(None, (e.strip() for e in encodings.split(','))):
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if encoding == 'br' and brotli:
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payload = brotli.compress(payload)
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elif 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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payload = buf.getvalue()
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elif encoding == 'deflate':
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payload = zlib.compress(payload)
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elif encoding == 'unsupported':
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payload = b'raw'
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break
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else:
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self._status(415)
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return
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self.send_response(200)
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self.send_header('Content-Encoding', encodings)
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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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else:
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self._status(404)
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@ -302,6 +329,55 @@ class TestHTTP(unittest.TestCase):
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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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@unittest.skipUnless(brotli, 'brotli support is not installed')
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def test_brotli(self):
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with FakeYDL() as ydl:
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res = ydl.urlopen(
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sanitized_Request(
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f'http://127.0.0.1:{self.http_port}/content-encoding',
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headers={'ytdl-encoding': 'br'}))
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self.assertEqual(res.headers.get('Content-Encoding'), 'br')
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self.assertEqual(res.read(), b'<html><video src="/vid.mp4" /></html>')
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def test_deflate(self):
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with FakeYDL() as ydl:
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res = ydl.urlopen(
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sanitized_Request(
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f'http://127.0.0.1:{self.http_port}/content-encoding',
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headers={'ytdl-encoding': 'deflate'}))
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self.assertEqual(res.headers.get('Content-Encoding'), 'deflate')
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self.assertEqual(res.read(), b'<html><video src="/vid.mp4" /></html>')
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def test_gzip(self):
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with FakeYDL() as ydl:
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res = ydl.urlopen(
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sanitized_Request(
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f'http://127.0.0.1:{self.http_port}/content-encoding',
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headers={'ytdl-encoding': 'gzip'}))
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self.assertEqual(res.headers.get('Content-Encoding'), 'gzip')
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self.assertEqual(res.read(), b'<html><video src="/vid.mp4" /></html>')
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def test_multiple_encodings(self):
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# https://www.rfc-editor.org/rfc/rfc9110.html#section-8.4
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with FakeYDL() as ydl:
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for pair in ('gzip,deflate', 'deflate, gzip', 'gzip, gzip', 'deflate, deflate'):
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res = ydl.urlopen(
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sanitized_Request(
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f'http://127.0.0.1:{self.http_port}/content-encoding',
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headers={'ytdl-encoding': pair}))
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self.assertEqual(res.headers.get('Content-Encoding'), pair)
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self.assertEqual(res.read(), b'<html><video src="/vid.mp4" /></html>')
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def test_unsupported_encoding(self):
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# it should return the raw content
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with FakeYDL() as ydl:
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res = ydl.urlopen(
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sanitized_Request(
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f'http://127.0.0.1:{self.http_port}/content-encoding',
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headers={'ytdl-encoding': 'unsupported'}))
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self.assertEqual(res.headers.get('Content-Encoding'), 'unsupported')
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self.assertEqual(res.read(), b'raw')
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class TestClientCert(unittest.TestCase):
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def setUp(self):
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@ -1361,6 +1361,23 @@ class YoutubeDLHandler(urllib.request.HTTPHandler):
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return data
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return brotli.decompress(data)
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@staticmethod
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def gz(data):
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gz = gzip.GzipFile(fileobj=io.BytesIO(data), mode='rb')
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try:
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return gz.read()
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except OSError as original_oserror:
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# There may be junk add the end of the file
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# See http://stackoverflow.com/q/4928560/35070 for details
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for i in range(1, 1024):
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try:
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gz = gzip.GzipFile(fileobj=io.BytesIO(data[:-i]), mode='rb')
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return gz.read()
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except OSError:
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continue
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else:
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raise original_oserror
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def http_request(self, req):
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# According to RFC 3986, URLs can not contain non-ASCII characters, however this is not
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# always respected by websites, some tend to give out URLs with non percent-encoded
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@ -1394,35 +1411,21 @@ class YoutubeDLHandler(urllib.request.HTTPHandler):
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def http_response(self, req, resp):
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old_resp = resp
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# gzip
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if resp.headers.get('Content-encoding', '') == 'gzip':
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content = resp.read()
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gz = gzip.GzipFile(fileobj=io.BytesIO(content), mode='rb')
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try:
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uncompressed = io.BytesIO(gz.read())
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except OSError as original_ioerror:
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# There may be junk add the end of the file
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# See http://stackoverflow.com/q/4928560/35070 for details
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for i in range(1, 1024):
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try:
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gz = gzip.GzipFile(fileobj=io.BytesIO(content[:-i]), mode='rb')
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uncompressed = io.BytesIO(gz.read())
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except OSError:
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continue
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break
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else:
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raise original_ioerror
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resp = urllib.request.addinfourl(uncompressed, old_resp.headers, old_resp.url, old_resp.code)
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resp.msg = old_resp.msg
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# deflate
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if resp.headers.get('Content-encoding', '') == 'deflate':
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gz = io.BytesIO(self.deflate(resp.read()))
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resp = urllib.request.addinfourl(gz, old_resp.headers, old_resp.url, old_resp.code)
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resp.msg = old_resp.msg
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# brotli
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if resp.headers.get('Content-encoding', '') == 'br':
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resp = urllib.request.addinfourl(
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io.BytesIO(self.brotli(resp.read())), old_resp.headers, old_resp.url, old_resp.code)
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# Content-Encoding header lists the encodings in order that they were applied [1].
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# To decompress, we simply do the reverse.
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# [1]: https://datatracker.ietf.org/doc/html/rfc9110#name-content-encoding
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decoded_response = None
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for encoding in (e.strip() for e in reversed(resp.headers.get('Content-encoding', '').split(','))):
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if encoding == 'gzip':
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decoded_response = self.gz(decoded_response or resp.read())
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elif encoding == 'deflate':
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decoded_response = self.deflate(decoded_response or resp.read())
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elif encoding == 'br' and brotli:
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decoded_response = self.brotli(decoded_response or resp.read())
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if decoded_response is not None:
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resp = urllib.request.addinfourl(io.BytesIO(decoded_response), old_resp.headers, old_resp.url, old_resp.code)
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resp.msg = old_resp.msg
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# Percent-encode redirect URL of Location HTTP header to satisfy RFC 3986 (see
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# https://github.com/ytdl-org/youtube-dl/issues/6457).
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