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Allow mime types to match based off of prefix #3617

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Allow mime types to match based off of prefix #3617

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8 changes: 6 additions & 2 deletions modules/upload/filetype.go
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Original file line number Diff line number Diff line change
Expand Up @@ -34,9 +34,13 @@ func VerifyAllowedContentType(buf []byte, allowedTypes []string) error {
for _, t := range allowedTypes {
t := strings.Trim(t, " ")

if t == "*/*" || t == fileType ||
if t == fileType ||
// Allow wildcard */* to match all mime types
t == "*/*" ||
// Allow directives after type, like 'text/plain; charset=utf-8'
strings.HasPrefix(fileType, t+";") {
strings.HasPrefix(fileType, t+";") ||
// Allow a class whitelist, like 'image/*'
(strings.HasSuffix(t, "/*") && strings.HasPrefix(fileType, strings.TrimRight(t, "*"))) {
return nil
}
}
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