diff --git a/synapse/rest/media/v1/upload_resource.py b/synapse/rest/media/v1/upload_resource.py
index 6da76ae994..1136277794 100644
--- a/synapse/rest/media/v1/upload_resource.py
+++ b/synapse/rest/media/v1/upload_resource.py
@@ -22,6 +22,7 @@ from twisted.web.http import Request
from synapse.api.errors import Codes, SynapseError
from synapse.http.server import DirectServeJsonResource, respond_with_json
from synapse.http.servlet import parse_string
+from synapse.rest.media.v1.media_storage import SpamMediaException
if TYPE_CHECKING:
from synapse.app.homeserver import HomeServer
@@ -86,9 +87,14 @@ class UploadResource(DirectServeJsonResource):
# disposition = headers.getRawHeaders(b"Content-Disposition")[0]
# TODO(markjh): parse content-dispostion
- content_uri = await self.media_repo.create_content(
- media_type, upload_name, request.content, content_length, requester.user
- )
+ try:
+ content_uri = await self.media_repo.create_content(
+ media_type, upload_name, request.content, content_length, requester.user
+ )
+ except SpamMediaException:
+ # For uploading of media we want to respond with a 400, instead of
+ # the default 404, as that would just be confusing.
+ raise SynapseError(400, "Bad content")
logger.info("Uploaded content with URI %r", content_uri)
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