diff options
Diffstat (limited to 'vendor/golang.org/x/net')
| -rw-r--r-- | vendor/golang.org/x/net/http2/transport.go | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/vendor/golang.org/x/net/http2/transport.go b/vendor/golang.org/x/net/http2/transport.go index 81778bec6..e4fb02530 100644 --- a/vendor/golang.org/x/net/http2/transport.go +++ b/vendor/golang.org/x/net/http2/transport.go @@ -1892,7 +1892,9 @@ func (rl *clientConnReadLoop) handleResponse(cs *clientStream, f *MetaHeadersFra return nil, errors.New("malformed response from server: malformed non-numeric status pseudo header") } - header := make(http.Header) + regularFields := f.RegularFields() + strs := make([]string, len(regularFields)) + header := make(http.Header, len(regularFields)) res := &http.Response{ Proto: "HTTP/2.0", ProtoMajor: 2, @@ -1900,7 +1902,7 @@ func (rl *clientConnReadLoop) handleResponse(cs *clientStream, f *MetaHeadersFra StatusCode: statusCode, Status: status + " " + http.StatusText(statusCode), } - for _, hf := range f.RegularFields() { + for _, hf := range regularFields { key := http.CanonicalHeaderKey(hf.Name) if key == "Trailer" { t := res.Trailer @@ -1912,7 +1914,18 @@ func (rl *clientConnReadLoop) handleResponse(cs *clientStream, f *MetaHeadersFra t[http.CanonicalHeaderKey(v)] = nil }) } else { - header[key] = append(header[key], hf.Value) + vv := header[key] + if vv == nil && len(strs) > 0 { + // More than likely this will be a single-element key. + // Most headers aren't multi-valued. + // Set the capacity on strs[0] to 1, so any future append + // won't extend the slice into the other strings. + vv, strs = strs[:1:1], strs[1:] + vv[0] = hf.Value + header[key] = vv + } else { + header[key] = append(vv, hf.Value) + } } } |