mime/multipart and HTTP multipart/form-data support

Somewhat of a work-in-progress (in that MIME is a large spec), but this is
functional and enough for discussion and/or code review.

In addition to the unit tests, I've tested with curl and Chrome with
a variety of test files, making sure the digests of files are unaltered
when read via a multipart Part.

R=rsc, adg, dsymonds1, agl1
CC=golang-dev
https://golang.org/cl/1681049

1 files changed, 18 insertions, 0 deletions

diff --git a/src/pkg/http/request_test.go b/src/pkg/http/request_test.go
index 98d5342bbb..4ba173a986 100644
--- a/src/pkg/http/request_test.go
+++ b/src/pkg/http/request_test.go
@@ -101,6 +101,24 @@ func TestPostContentTypeParsing(t *testing.T) {
 	}
 }
 
+func TestMultipartReader(t *testing.T) {
+	req := &Request{
+		Method: "POST",
+		Header: stringMap{"Content-Type": `multipart/form-data; boundary="foo123"`},
+		Body:   nopCloser{new(bytes.Buffer)},
+	}
+	multipart, err := req.MultipartReader()
+	if multipart == nil {
+		t.Errorf("expected multipart; error: %v", err)
+	}
+
+	req.Header = stringMap{"Content-Type": "text/plain"}
+	multipart, err = req.MultipartReader()
+	if multipart != nil {
+		t.Errorf("unexpected multipart for text/plain")
+	}
+}
+
 func TestRedirect(t *testing.T) {
 	const (
 		start = "http://codesearch.google.com/"