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Enforce `mediaIDRegex` to be only valid `mediaIDCharacters` (#1020) 

Error messages indicate that:
> mediaId must be a non-empty string using only characters in `mediaIDCharacters`

However the regex used only required that some characters in the filename match
the restriction, not that the entire filename does. This commit ensures that
the filename must entirely fullfill the `mediaIDCharacters` restriction

Signed-off-by: Sid Karunaratne <sid@karunaratne.net>

Co-authored-by: Kegsay <kegan@matrix.org>
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Sid Karunaratne 2020-05-13 19:04:54 +08:00 committed by GitHub
parent 106a335b7d
commit 31e6a7f193
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1 changed files with 1 additions and 1 deletions
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2
mediaapi/routing/download.go
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@ -43,7 +43,7 @@ import (
const mediaIDCharacters = "A-Za-z0-9_=-"
// Note: unfortunately regex.MustCompile() cannot be assigned to a const
var mediaIDRegex = regexp.MustCompile("[" + mediaIDCharacters + "]+")
var mediaIDRegex = regexp.MustCompile("^[" + mediaIDCharacters + "]+$")
// downloadRequest metadata included in or derivable from a download or thumbnail request
// https://matrix.org/docs/spec/client_server/r0.2.0.html#get-matrix-media-r0-download-servername-mediaid