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synapse/synapse
Eric Eastwood 7b67e93d49
Provide more info why we don't have any thumbnails to serve (#13038)
Fix https://github.com/matrix-org/synapse/issues/13016

## New error code and status

### Before

Previously, we returned a `404` for `/thumbnail` which isn't even in the spec.

```json
{
  "errcode": "M_NOT_FOUND",
  "error": "Not found [b'hs1', b'tefQeZhmVxoiBfuFQUKRzJxc']"
}
```

### After

What does the spec say?

> 400: The request does not make sense to the server, or the server cannot thumbnail the content. For example, the client requested non-integer dimensions or asked for negatively-sized images.
>
> *-- https://spec.matrix.org/v1.1/client-server-api/#get_matrixmediav3thumbnailservernamemediaid*

Now with this PR, we respond with a `400` when we don't have thumbnails to serve and we explain why we might not have any thumbnails.

```json
{
    "errcode": "M_UNKNOWN",
    "error": "Cannot find any thumbnails for the requested media ([b'example.com', b'12345']). This might mean the media is not a supported_media_format=(image/jpeg, image/jpg, image/webp, image/gif, image/png) or that thumbnailing failed for some other reason. (Dynamic thumbnails are disabled on this server.)",
}
```

> Cannot find any thumbnails for the requested media ([b'example.com', b'12345']). This might mean the media is not a supported_media_format=(image/jpeg, image/jpg, image/webp, image/gif, image/png) or that thumbnailing failed for some other reason. (Dynamic thumbnails are disabled on this server.)


---

We still respond with a 404 in many other places. But we can iterate on those later and maybe keep some in some specific places after spec updates/clarification: https://github.com/matrix-org/matrix-spec/issues/1122

We can also iterate on the bugs where Synapse doesn't thumbnail when it should in other issues/PRs.
2022-07-15 11:42:21 -05:00
..
_scripts Drop unused tables from groups/communities. (#12967) 2022-07-13 09:55:14 -04:00
api Allow rate limiters to passively record actions they cannot limit (#13253) 2022-07-13 19:09:42 +00:00
app Drop support for delegating email validation (#13192) 2022-07-12 19:18:53 +01:00
appservice Add prometheus counters for content types other than events (#13175) 2022-07-13 15:18:20 +01:00
config Provide more info why we don't have any thumbnails to serve (#13038) 2022-07-15 11:42:21 -05:00
crypto Bump black and click versions (#12320) 2022-04-05 11:04:28 +01:00
events Use state before join to determine if we _should_perform_remote_join (#13270) 2022-07-15 12:20:47 +00:00
federation Federation Sender & Appservice Pusher Stream Optimisations (#13251) 2022-07-15 09:36:56 +01:00
handlers Use state before join to determine if we _should_perform_remote_join (#13270) 2022-07-15 12:20:47 +00:00
http Add Cross-Origin-Resource-Policy header to thumbnail and download media endpoints (#12944) 2022-06-27 14:44:05 +01:00
logging More type hints for synapse.logging (#13103) 2022-06-30 13:05:06 +00:00
metrics Fix Synapse git info missing in version strings (#12973) 2022-06-07 15:24:11 +01:00
module_api Uniformize spam-checker API, part 5: expand other spam-checker callbacks to return Tuple[Codes, dict] (#13044) 2022-07-11 16:52:10 +00:00
push Don't pull out the full state when calculating push actions (#13078) 2022-07-11 20:08:39 +00:00
replication Faster room joins: fix race in recalculation of current room state (#13151) 2022-07-07 12:19:31 +00:00
res Fix Jinja templating error when generating thumbnail URLs. (#12510) 2022-04-20 12:03:03 -04:00
rest Provide more info why we don't have any thumbnails to serve (#13038) 2022-07-15 11:42:21 -05:00
server_notices Decouple synapse.api.auth_blocking.AuthBlocking from synapse.api.auth.Auth. (#13021) 2022-06-14 09:51:15 +01:00
spam_checker_api Fix import in module_api module and docs on the new check_event_for_spam signature (#12918) 2022-05-31 12:04:53 +02:00
state Don't pull out the full state when storing state (#13274) 2022-07-15 12:59:45 +00:00
static
storage Don't pull out the full state when storing state (#13274) 2022-07-15 12:59:45 +00:00
streams Rework stream token to stop caring about groups. (#12897) 2022-05-31 07:42:50 -04:00
util Async get event cache prep (#13242) 2022-07-15 09:30:46 +00:00
__init__.py Fix Synapse git info missing in version strings (#12973) 2022-06-07 15:24:11 +01:00
event_auth.py Add support for room version 10 (#13220) 2022-07-13 11:36:02 -07:00
notifier.py Notifier: accept callbacks to fire on room joins (#13254) 2022-07-13 19:48:24 +01:00
py.typed
server.py Move the "email unsubscribe" resource, refactor the macaroon generator & simplify the access token verification logic. (#12986) 2022-06-14 09:12:08 -04:00
types.py Fix destination_is errors seen in sentry. (#13041) 2022-06-14 18:28:26 +01:00
visibility.py Add a filter_event_for_clients_with_state function (#13222) 2022-07-11 14:14:09 +01:00