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Handle missing Content-Type header when accessing remote media (#11200)
* add code to handle missing content-type header and a test to verify that it works * add handling for missing content-type in the /upload endpoint as well * slightly refactor test code to put private method in approriate place * handle possible null value for content-type when pulling from the local db * add changelog * refactor test and add code to handle missing content-type in cached remote media * requested changes * Update changelog.d/11200.bugfix Co-authored-by: Sean Quah <8349537+squahtx@users.noreply.github.com> Co-authored-by: Sean Quah <8349537+squahtx@users.noreply.github.com>
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changelog.d/11200.bugfix
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changelog.d/11200.bugfix
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Fix a long-standing bug wherein a missing `Content-Type` header when downloading remote media would cause Synapse to throw an error.
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@ -215,6 +215,8 @@ class MediaRepository:
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self.mark_recently_accessed(None, media_id)
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media_type = media_info["media_type"]
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if not media_type:
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media_type = "application/octet-stream"
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media_length = media_info["media_length"]
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upload_name = name if name else media_info["upload_name"]
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url_cache = media_info["url_cache"]
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@ -333,6 +335,9 @@ class MediaRepository:
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logger.info("Media is quarantined")
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raise NotFoundError()
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if not media_info["media_type"]:
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media_info["media_type"] = "application/octet-stream"
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responder = await self.media_storage.fetch_media(file_info)
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if responder:
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return responder, media_info
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@ -354,6 +359,8 @@ class MediaRepository:
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raise e
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file_id = media_info["filesystem_id"]
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if not media_info["media_type"]:
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media_info["media_type"] = "application/octet-stream"
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file_info = FileInfo(server_name, file_id)
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# We generate thumbnails even if another process downloaded the media
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@ -445,7 +452,10 @@ class MediaRepository:
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await finish()
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media_type = headers[b"Content-Type"][0].decode("ascii")
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if b"Content-Type" in headers:
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media_type = headers[b"Content-Type"][0].decode("ascii")
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else:
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media_type = "application/octet-stream"
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upload_name = get_filename_from_headers(headers)
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time_now_ms = self.clock.time_msec()
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@ -80,7 +80,7 @@ class UploadResource(DirectServeJsonResource):
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assert content_type_headers # for mypy
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media_type = content_type_headers[0].decode("ascii")
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else:
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raise SynapseError(msg="Upload request missing 'Content-Type'", code=400)
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media_type = "application/octet-stream"
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# if headers.hasHeader(b"Content-Disposition"):
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# disposition = headers.getRawHeaders(b"Content-Disposition")[0]
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@ -248,7 +248,7 @@ class MediaRepoTests(unittest.HomeserverTestCase):
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self.media_id = "example.com/12345"
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def _req(self, content_disposition):
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def _req(self, content_disposition, include_content_type=True):
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channel = make_request(
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self.reactor,
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@ -271,8 +271,11 @@ class MediaRepoTests(unittest.HomeserverTestCase):
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headers = {
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b"Content-Length": [b"%d" % (len(self.test_image.data))],
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b"Content-Type": [self.test_image.content_type],
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}
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if include_content_type:
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headers[b"Content-Type"] = [self.test_image.content_type]
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if content_disposition:
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headers[b"Content-Disposition"] = [content_disposition]
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@ -285,6 +288,17 @@ class MediaRepoTests(unittest.HomeserverTestCase):
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return channel
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def test_handle_missing_content_type(self):
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channel = self._req(
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b"inline; filename=out" + self.test_image.extension,
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include_content_type=False,
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)
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headers = channel.headers
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self.assertEqual(channel.code, 200)
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self.assertEqual(
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headers.getRawHeaders(b"Content-Type"), [b"application/octet-stream"]
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)
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def test_disposition_filename_ascii(self):
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"""
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If the filename is filename=<ascii> then Synapse will decode it as an
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