mime: lower-case media type parameters
RFC 1521 section 4 states "The type, subtype, and parameter names are not case sensitive.".
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/4648047
diff --git a/src/pkg/mime/mediatype.go b/src/pkg/mime/mediatype.go
index a270cb9..96edbd6 100644
--- a/src/pkg/mime/mediatype.go
+++ b/src/pkg/mime/mediatype.go
@@ -32,10 +32,12 @@
// ParseMediaType parses a media type value and any optional
// parameters, per RFC 1521. Media types are the values in
-// Content-Type and Content-Disposition headers (RFC 2183). On
-// success, ParseMediaType returns the media type converted to
-// lowercase and trimmed of white space and a non-nil params. On
-// error, it returns an empty string and a nil params.
+// Content-Type and Content-Disposition headers (RFC 2183).
+// On success, ParseMediaType returns the media type converted
+// to lowercase and trimmed of white space. The returned params
+// is always a non-nil map. Params maps from the lowercase
+// attribute to the attribute value with its case preserved.
+// On error, it returns an empty string and a nil params.
func ParseMediaType(v string) (mediatype string, params map[string]string) {
i := strings.Index(v, ";")
if i == -1 {
@@ -211,6 +213,7 @@
rest = rest[1:] // consume semicolon
rest = strings.TrimLeftFunc(rest, unicode.IsSpace)
param, rest = consumeToken(rest)
+ param = strings.ToLower(param)
if param == "" {
return "", "", v
}
diff --git a/src/pkg/mime/mediatype_test.go b/src/pkg/mime/mediatype_test.go
index 454ddd0..93264bd 100644
--- a/src/pkg/mime/mediatype_test.go
+++ b/src/pkg/mime/mediatype_test.go
@@ -60,6 +60,7 @@
{" ; foo=bar", "foo", "bar", ""},
{"; foo=bar", "foo", "bar", ""},
{";foo=bar", "foo", "bar", ""},
+ {";FOO=bar", "foo", "bar", ""},
{`;foo="bar"`, "foo", "bar", ""},
{`;foo="bar"; `, "foo", "bar", "; "},
{`;foo="bar"; foo=baz`, "foo", "bar", "; foo=baz"},
@@ -127,7 +128,7 @@
`URL*1="cs.utk.edu/pub/moore/bulk-mailer/bulk-mailer.tar"`,
"message/external-body",
m("access-type", "URL",
- "URL", "ftp://cs.utk.edu/pub/moore/bulk-mailer/bulk-mailer.tar")},
+ "url", "ftp://cs.utk.edu/pub/moore/bulk-mailer/bulk-mailer.tar")},
{`application/x-stuff; ` +
`title*0*=us-ascii'en'This%20is%20even%20more%20; ` +
