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redo CL 5302057 / dac58d9c9e4a

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««« original CL description
http: remove Connection header in ReverseProxy

Fixes #2342

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/5302057
»»»

R=bradfitz, dsymonds
CC=golang-dev
https://golang.org/cl/5296055
This commit is contained in:
Andrew Gerrand 2011-10-26 15:27:29 +09:00
parent d12f66a8e8
commit f777be8f83
2 changed files with 24 additions and 6 deletions
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25
src/pkg/http/reverseproxy.go
View File

@ -69,6 +69,14 @@ func NewSingleHostReverseProxy(target *url.URL) *ReverseProxy {
return &ReverseProxy{Director: director}
}
func copyHeader(dst, src Header) {
for k, vv := range src {
for _, v := range vv {
dst.Add(k, v)
}
}
}
func (p *ReverseProxy) ServeHTTP(rw ResponseWriter, req *Request) {
transport := p.Transport
if transport == nil {
@ -84,6 +92,16 @@ func (p *ReverseProxy) ServeHTTP(rw ResponseWriter, req *Request) {
outreq.ProtoMinor = 1
outreq.Close = false
// Remove the connection header to the backend. We want a
// persistent connection, regardless of what the client sent
// to us. This is modifying the same underlying map from req
// (shallow copied above) so we only copy it if necessary.
if outreq.Header.Get("Connection") != "" {
outreq.Header = make(Header)
copyHeader(outreq.Header, req.Header)
outreq.Header.Del("Connection")
}
if clientIp, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
outreq.Header.Set("X-Forwarded-For", clientIp)
}
@ -95,12 +113,7 @@ func (p *ReverseProxy) ServeHTTP(rw ResponseWriter, req *Request) {
return
}
hdr := rw.Header()
for k, vv := range res.Header {
for _, v := range vv {
hdr.Add(k, v)
}
}
copyHeader(rw.Header(), res.Header)
rw.WriteHeader(res.StatusCode)

5
src/pkg/http/reverseproxy_test.go
View File

@ -24,6 +24,9 @@ func TestReverseProxy(t *testing.T) {
if r.Header.Get("X-Forwarded-For") == "" {
t.Errorf("didn't get X-Forwarded-For header")
}
if c := r.Header.Get("Connection"); c != "" {
t.Errorf("handler got Connection header value %q", c)
}
if g, e := r.Host, "some-name"; g != e {
t.Errorf("backend got Host header %q, want %q", g, e)
}
@ -43,6 +46,8 @@ func TestReverseProxy(t *testing.T) {
getReq, _ := NewRequest("GET", frontend.URL, nil)
getReq.Host = "some-name"
getReq.Header.Set("Connection", "close")
getReq.Close = true
res, err := DefaultClient.Do(getReq)
if err != nil {
t.Fatalf("Get: %v", err)