feat(filevalidator.js): relax detection algorithm

buzinas · buzinas · commit 43d48850eba5 · 2018-08-17T11:59:44.000-03:00
diff --git a/filevalidator.js b/filevalidator.js
@@ -11,7 +11,15 @@ function(_) {
             // MPEG-1 Layer 3 file without an ID3 tag or with an ID3v1 tag (which's appended at the end of the file)
             [0xFF, 0xFB],
             // MP3 file with an ID3v2 container
-            [0x49, 0x44, 0x33]
+            [0x49, 0x44, 0x33],
+            // Other MP3 files (FF Fx and FF Ex – they may cause false-positives)
+            // Headers got from https://www.garykessler.net/library/file_sigs.html
+            [0xFF, 0xE0], [0xFF, 0xE1], [0xFF, 0xE2], [0xFF, 0xE3], [0xFF, 0xE4],
+            [0xFF, 0xE5], [0xFF, 0xE6], [0xFF, 0xE7], [0xFF, 0xE8], [0xFF, 0xE9],
+            [0xFF, 0xEA], [0xFF, 0xEB], [0xFF, 0xEC], [0xFF, 0xED], [0xFF, 0xEE], [0xFF, 0xEF],
+            [0xFF, 0xF0], [0xFF, 0xF1], [0xFF, 0xF2], [0xFF, 0xF3], [0xFF, 0xF4],
+            [0xFF, 0xF5], [0xFF, 0xF6], [0xFF, 0xF7], [0xFF, 0xF8], [0xFF, 0xF9],
+            [0xFF, 0xFA], [0xFF, 0xFB], [0xFF, 0xFC], [0xFF, 0xFD], [0xFF, 0xFE], [0xFF, 0xFF]
         ],
         'wav': [
             // Waveform Audio File Format
