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-rw-r--r--synapse/rest/media/v1/base_resource.py5
-rw-r--r--synapse/rest/media/v1/download_resource.py16
-rw-r--r--synapse/rest/media/v1/thumbnail_resource.py2
3 files changed, 14 insertions, 9 deletions
diff --git a/synapse/rest/media/v1/base_resource.py b/synapse/rest/media/v1/base_resource.py
index 1b7517e2f0..c43ae0314b 100644
--- a/synapse/rest/media/v1/base_resource.py
+++ b/synapse/rest/media/v1/base_resource.py
@@ -42,7 +42,10 @@ def parse_media_id(request):
         # This allows users to append e.g. /test.png to the URL. Useful for
         # clients that parse the URL to see content type.
         server_name, media_id = request.postpath[:2]
-        return (server_name, media_id)
+        if len(request.postpath) > 2 and is_ascii(request.postpath[-1]):
+            return server_name, media_id, request.postpath[-1]
+        else:
+            return server_name, media_id, None
     except:
         raise SynapseError(
             404,
diff --git a/synapse/rest/media/v1/download_resource.py b/synapse/rest/media/v1/download_resource.py
index 2af48ab62f..ab384e5388 100644
--- a/synapse/rest/media/v1/download_resource.py
+++ b/synapse/rest/media/v1/download_resource.py
@@ -32,14 +32,16 @@ class DownloadResource(BaseMediaResource):
     @request_handler
     @defer.inlineCallbacks
     def _async_render_GET(self, request):
-        server_name, media_id = parse_media_id(request)
+        server_name, media_id, name = parse_media_id(request)
         if server_name == self.server_name:
-            yield self._respond_local_file(request, media_id)
+            yield self._respond_local_file(request, media_id, name)
         else:
-            yield self._respond_remote_file(request, server_name, media_id)
+            yield self._respond_remote_file(
+                request, server_name, media_id, name
+            )
 
     @defer.inlineCallbacks
-    def _respond_local_file(self, request, media_id):
+    def _respond_local_file(self, request, media_id, name):
         media_info = yield self.store.get_local_media(media_id)
         if not media_info:
             self._respond_404(request)
@@ -47,7 +49,7 @@ class DownloadResource(BaseMediaResource):
 
         media_type = media_info["media_type"]
         media_length = media_info["media_length"]
-        upload_name = media_info["upload_name"]
+        upload_name = name if name else media_info["upload_name"]
         file_path = self.filepaths.local_media_filepath(media_id)
 
         yield self._respond_with_file(
@@ -56,13 +58,13 @@ class DownloadResource(BaseMediaResource):
         )
 
     @defer.inlineCallbacks
-    def _respond_remote_file(self, request, server_name, media_id):
+    def _respond_remote_file(self, request, server_name, media_id, name):
         media_info = yield self._get_remote_media(server_name, media_id)
 
         media_type = media_info["media_type"]
         media_length = media_info["media_length"]
         filesystem_id = media_info["filesystem_id"]
-        upload_name = media_info["upload_name"]
+        upload_name = name if name else media_info["upload_name"]
 
         file_path = self.filepaths.remote_media_filepath(
             server_name, filesystem_id
diff --git a/synapse/rest/media/v1/thumbnail_resource.py b/synapse/rest/media/v1/thumbnail_resource.py
index 1dadd880b2..4a9b6d8eeb 100644
--- a/synapse/rest/media/v1/thumbnail_resource.py
+++ b/synapse/rest/media/v1/thumbnail_resource.py
@@ -36,7 +36,7 @@ class ThumbnailResource(BaseMediaResource):
     @request_handler
     @defer.inlineCallbacks
     def _async_render_GET(self, request):
-        server_name, media_id = parse_media_id(request)
+        server_name, media_id, _ = parse_media_id(request)
         width = parse_integer(request, "width")
         height = parse_integer(request, "height")
         method = parse_string(request, "method", "scale")