charset could be uppercase too

diff --git a/cmd/sgblog-comment-add/mail.go b/cmd/sgblog-comment-add/mail.go
index 363e9839453230a2b8a0362958aa2575ef9d2a6d..1a347fcb5cdfa07cd85f130494e15dde00809e91 100644 (file)
--- a/cmd/sgblog-comment-add/mail.go
+++ b/cmd/sgblog-comment-add/mail.go
@@ -41,7 +41,10 @@ func processTP(ct, cte string, body io.Reader) (io.Reader, error) {
        if err != nil {
                return nil, err
        }
-       if c := params["charset"]; !(c == "" || c == "utf-8" || c == "iso-8859-1" || c == "us-ascii") {
+       if c := strings.ToLower(params["charset"]); !(c == "" ||
+               c == "utf-8" ||
+               c == "iso-8859-1" ||
+               c == "us-ascii") {
                return nil, errors.New("only utf-8/iso-8859-1/us-ascii charsets supported")
        }
        switch cte {