use go 1.12

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/lucas-clemente/quic-go/h2quic/response.go

@@ -0,0 +1,95 @@
+package h2quic
+
+import (
+	"bytes"
+	"errors"
+	"io/ioutil"
+	"net/http"
+	"net/textproto"
+	"strconv"
+	"strings"
+
+	"golang.org/x/net/http2"
+)
+
+// copied from net/http2/transport.go
+
+var errResponseHeaderListSize = errors.New("http2: response header list larger than advertised limit")
+var noBody = ioutil.NopCloser(bytes.NewReader(nil))
+
+// from the handleResponse function
+func responseFromHeaders(f *http2.MetaHeadersFrame) (*http.Response, error) {
+	if f.Truncated {
+		return nil, errResponseHeaderListSize
+	}
+
+	status := f.PseudoValue("status")
+	if status == "" {
+		return nil, errors.New("missing status pseudo header")
+	}
+	statusCode, err := strconv.Atoi(status)
+	if err != nil {
+		return nil, errors.New("malformed non-numeric status pseudo header")
+	}
+
+	// TODO: handle statusCode == 100
+
+	header := make(http.Header)
+	res := &http.Response{
+		Proto:      "HTTP/2.0",
+		ProtoMajor: 2,
+		Header:     header,
+		StatusCode: statusCode,
+		Status:     status + " " + http.StatusText(statusCode),
+	}
+	for _, hf := range f.RegularFields() {
+		key := http.CanonicalHeaderKey(hf.Name)
+		if key == "Trailer" {
+			t := res.Trailer
+			if t == nil {
+				t = make(http.Header)
+				res.Trailer = t
+			}
+			foreachHeaderElement(hf.Value, func(v string) {
+				t[http.CanonicalHeaderKey(v)] = nil
+			})
+		} else {
+			header[key] = append(header[key], hf.Value)
+		}
+	}
+
+	return res, nil
+}
+
+// continuation of the handleResponse function
+func setLength(res *http.Response, isHead, streamEnded bool) *http.Response {
+	if !streamEnded || isHead {
+		res.ContentLength = -1
+		if clens := res.Header["Content-Length"]; len(clens) == 1 {
+			if clen64, err := strconv.ParseInt(clens[0], 10, 64); err == nil {
+				res.ContentLength = clen64
+			}
+		}
+	}
+	return res
+}
+
+// copied from net/http/server.go
+
+// foreachHeaderElement splits v according to the "#rule" construction
+// in RFC 2616 section 2.1 and calls fn for each non-empty element.
+func foreachHeaderElement(v string, fn func(string)) {
+	v = textproto.TrimString(v)
+	if v == "" {
+		return
+	}
+	if !strings.Contains(v, ",") {
+		fn(v)
+		return
+	}
+	for _, f := range strings.Split(v, ",") {
+		if f = textproto.TrimString(f); f != "" {
+			fn(f)
+		}
+	}
+}