fix(subsonic): send valid content-type with http.ServeStream

mime/mime.go

@@ -1,24 +1,38 @@
+//nolint:gochecknoglobals
 package mime
 
-func FromExtension(ext string) string {
-	switch ext {
-	case "mp3":
-		return "audio/mpeg"
-	case "flac":
-		return "audio/x-flac"
-	case "aac":
-		return "audio/x-aac"
-	case "m4a":
-		return "audio/m4a"
-	case "m4b":
-		return "audio/m4b"
-	case "ogg":
-		return "audio/ogg"
-	case "opus":
-		return "audio/ogg"
-	case "wma":
-		return "audio/x-ms-wma"
-	default:
-		return ""
+import (
+	"log"
+	stdmime "mime"
+)
+
+var supportedAudioTypes = map[string]string{
+	".mp3":  "audio/mpeg",
+	".flac": "audio/x-flac",
+	".aac":  "audio/x-aac",
+	".m4a":  "audio/m4a",
+	".m4b":  "audio/m4b",
+	".ogg":  "audio/ogg",
+	".opus": "audio/ogg",
+	".wma":  "audio/x-ms-wma",
+}
+
+//nolint:gochecknoinits
+func init() {
+	for ext, mime := range supportedAudioTypes {
+		if err := stdmime.AddExtensionType(ext, mime); err != nil {
+			log.Fatalf("adding audio type mime for ext %q: %v", ext, err)
+		}
 	}
 }
+
+var TypeByExtension = stdmime.TypeByExtension
+var ParseMediaType = stdmime.ParseMediaType
+var FormatMediaType = stdmime.FormatMediaType
+
+func TypeByAudioExtension(ext string) string {
+	if _, ok := supportedAudioTypes[ext]; !ok {
+		return ""
+	}
+	return stdmime.TypeByExtension(ext)
+}