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MSC3860: Media Download Redirects #3860

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Merged
merged 16 commits into from
May 9, 2023
Merged

MSC3860: Media Download Redirects #3860

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ce59930
Add media download redirect proposal
Fizzadar Aug 4, 2022
964c19e
Add urls
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Rename
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9807bf4
Add note about MSC proposal and implementation work
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Add missing sections to MSC
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6767a51
Rework to be opt-in via query param
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Fix typos
sumnerevans Mar 29, 2023
c9896a9
Clarify security considerations
sumnerevans Mar 29, 2023
4b61481
Clarify that unstable prefix should be used
sumnerevans Mar 30, 2023
c2e9d45
Add 308 status code for redirects
Fizzadar Apr 22, 2023
117f90c
Add clarification about no/false redirect param
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Add link to current spec media endpoints
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a7733d9
Add note about additional benefit of not proxying untrusted homeserve…
Fizzadar May 2, 2023
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Expand issues section to cover possible homeserver abuse
Fizzadar May 2, 2023
2b93616
fix a typo
anoadragon453 May 4, 2023
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12 changes: 12 additions & 0 deletions proposals/3860-media-download-redirect.md
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# MSC3860: Media Download Redirects

Currently the media download endpoints must return either a 200 with content or error responses. This means the media server instance must stream the data from wherever it is stored, which is likely not local to itself. Allowing redirects on these endpoints would
make it possible for the media repo to tell clients/servers to pull data direct from the source, eg. a CDN.

## Proposal

This MSC simply proposes that a 307 redirect code is allowed and followed according to the `Location` header. It is possible some clients would already follow these which needs to be confirmed. Specifc endpoints in question:

+ `/_matrix/media/v3/download/{serverName}/{mediaId}`
+ `/_matrix/media/v3/download/{serverName}/{mediaId}/{fileName}`
+ `/_matrix/media/v3/thumbnail/{serverName}/{mediaId}`