1 files changed, 11 insertions, 0 deletions
diff --git a/src/edit/util.go b/src/edit/util.go
index b6dfde1..5835b10 100644
--- a/src/edit/util.go
+++ b/src/edit/util.go
@@ -5,6 +5,7 @@ import (
 	"net/http"
 	"os/exec"
 	"path"
+	"strings"
 )
 
 type exitError exec.ExitError
@@ -34,3 +35,13 @@ func getctype(name string, content []byte) string {
 	}
 	return ctype
 }
+
+func istext(ctype string) bool {
+	i := strings.Index(ctype, ";")
+	if i == -1 {
+		i = len(ctype)
+	}
+	ctype = strings.TrimSpace(strings.ToLower(ctype[0:i]))
+
+	return strings.HasPrefix(ctype, "text/") || strings.HasSuffix(ctype, "+xml")
+}