Initial QSfera import

Server/vendor/github.com/gookit/goutil/fsutil/mime.go

@@ -0,0 +1,40 @@
+package fsutil
+
+import (
+	"io"
+	"net/http"
+	"os"
+)
+
+// DetectMime detect a file mime type. alias of MimeType()
+func DetectMime(path string) string {
+	return MimeType(path)
+}
+
+// MimeType get file mime type name. eg "image/png"
+func MimeType(path string) (mime string) {
+	file, err := os.Open(path)
+	if err != nil {
+		return
+	}
+	return ReaderMimeType(file)
+}
+
+// ReaderMimeType get the io.Reader mimeType
+//
+// Usage:
+//
+//	file, err := os.Open(filepath)
+//	if err != nil {
+//		return
+//	}
+//	mime := ReaderMimeType(file)
+func ReaderMimeType(r io.Reader) (mime string) {
+	var buf [MimeSniffLen]byte
+	n, _ := io.ReadFull(r, buf[:])
+	if n == 0 {
+		return ""
+	}
+
+	return http.DetectContentType(buf[:n])
+}