From 98ef88b6689bf52c96deb51ed057829465c76279 Mon Sep 17 00:00:00 2001
From: Robert Swain <rob@matrix.org>
Date: Fri, 26 May 2017 14:59:45 +0200
Subject: [PATCH] mediaapi/writers/download: Clarify validation applied to
 Origin

---
 src/github.com/matrix-org/dendrite/mediaapi/writers/download.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/github.com/matrix-org/dendrite/mediaapi/writers/download.go b/src/github.com/matrix-org/dendrite/mediaapi/writers/download.go
index 7e52ec519..1d1097d4b 100644
--- a/src/github.com/matrix-org/dendrite/mediaapi/writers/download.go
+++ b/src/github.com/matrix-org/dendrite/mediaapi/writers/download.go
@@ -91,6 +91,8 @@ func (r *downloadRequest) Validate() *util.JSONResponse {
 			JSON: jsonerror.NotFound(fmt.Sprintf("mediaId must be a non-empty string using only characters in %v", mediaIDCharacters)),
 		}
 	}
+	// Note: the origin will be validated either by comparison to the configured server name of this homeserver
+	// or by a DNS SRV record lookup when creating a request for remote files
 	if r.MediaMetadata.Origin == "" {
 		return &util.JSONResponse{
 			Code: 404,