mime.go RawHistoryFolder

1package webutil
2
3import (
4	"mime"
5	"path/filepath"
6	"strings"
7)
8
9// GetMimeType determines the MIME type for a given file path.
10// It tries the standard library first, then falls back to common web asset types.
11func GetMimeType(filename string) string {
12	lowerName := strings.ToLower(filename)
13	ext := filepath.Ext(lowerName)
14	if ext == ".br" {
15		return GetMimeType(strings.TrimSuffix(lowerName, ext))
16	}
17
18	mt := mime.TypeByExtension(ext)
19	if mt != "" {
20		return mt
21	}
22
23	switch ext {
24	case ".js", ".mjs":
25		return "application/javascript"
26	case ".css":
27		return "text/css"
28	case ".svg":
29		return "image/svg+xml"
30	case ".ico":
31		return "image/x-icon"
32	case ".woff":
33		return "font/woff"
34	case ".woff2":
35		return "font/woff2"
36	case ".ttf":
37		return "font/ttf"
38	case ".otf":
39		return "font/otf"
40	case ".png":
41		return "image/png"
42	case ".jpg", ".jpeg":
43		return "image/jpeg"
44	case ".gif":
45		return "image/gif"
46	case ".webp":
47		return "image/webp"
48	case ".m3u8":
49		return "application/vnd.apple.mpegurl" // RFC 8216
50	case ".json":
51		return "application/json"
52	case ".xml":
53		return "application/xml"
54	case ".html", ".htm":
55		return "text/html; charset=utf-8"
56	default:
57		return "text/plain"
58	}
59}