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Set upstream X-Forwarded Host and For headers if not present

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- remove http client host override fix #847
- X-Forwarded-For and X-Forwarded-Host are usually handled by the ingress
controller, if those headers are not set then the gateway will create them

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>
This commit is contained in:
Stefan Prodan 2018-09-08 18:39:26 +03:00 committed by Alex Ellis
parent 96504b0a74
commit 3d44fa813a
2 changed files with 15 additions and 10 deletions
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13
gateway/handlers/forwarding_proxy.go
View File

@ -76,12 +76,15 @@ func buildUpstreamRequest(r *http.Request, baseURL string, requestURL string) *h
}
upstreamReq, _ := http.NewRequest(r.Method, url, nil)
if len(r.Host) > 0 {
upstreamReq.Host = r.Host
}
copyHeaders(upstreamReq.Header, &r.Header)
upstreamReq.Header["X-Forwarded-For"] = []string{r.RemoteAddr}
if len(r.Host) > 0 && upstreamReq.Header.Get("X-Forwarded-Host") == "" {
upstreamReq.Header["X-Forwarded-Host"] = []string{r.Host}
}
if upstreamReq.Header.Get("X-Forwarded-For") == "" {
upstreamReq.Header["X-Forwarded-For"] = []string{r.RemoteAddr}
}
if r.Body != nil {
upstreamReq.Body = r.Body
@ -100,6 +103,8 @@ func forwardRequest(w http.ResponseWriter, r *http.Request, proxyClient *http.Cl
ctx, cancel := context.WithTimeout(context.Background(), timeout)
defer cancel()
log.Printf("Upstream request to: %s, %+v\n", upstreamReq.URL.Path, upstreamReq)
res, resErr := proxyClient.Do(upstreamReq.WithContext(ctx))
if resErr != nil {
badStatus := http.StatusBadGateway

12
gateway/handlers/forwarding_proxy_test.go
View File

@ -72,7 +72,7 @@ func Test_buildUpstreamRequest_NoBody_GetMethod_NoQuery(t *testing.T) {
}
func Test_buildUpstreamRequest_HasHostHeaderWhenSet(t *testing.T) {
func Test_buildUpstreamRequest_HasXForwardedHostHeaderWhenSet(t *testing.T) {
srcBytes := []byte("hello world")
reader := bytes.NewReader(srcBytes)
@ -84,12 +84,12 @@ func Test_buildUpstreamRequest_HasHostHeaderWhenSet(t *testing.T) {
upstream := buildUpstreamRequest(request, "/", "/")
if request.Host != upstream.Host {
t.Errorf("Host - want: %s, got: %s", request.Host, upstream.Host)
if request.Host != upstream.Header.Get("X-Forwarded-Host") {
t.Errorf("Host - want: %s, got: %s", request.Host, upstream.Header.Get("X-Forwarded-Host"))
}
}
func Test_buildUpstreamRequest_HostHeader_Empty_WhenNotSet(t *testing.T) {
func Test_buildUpstreamRequest_XForwardedHostHeader_Empty_WhenNotSet(t *testing.T) {
srcBytes := []byte("hello world")
reader := bytes.NewReader(srcBytes)
@ -101,8 +101,8 @@ func Test_buildUpstreamRequest_HostHeader_Empty_WhenNotSet(t *testing.T) {
upstream := buildUpstreamRequest(request, "/", "/")
if request.Host != upstream.Host {
t.Errorf("Host - want: %s, got: %s", request.Host, upstream.Host)
if request.Host != upstream.Header.Get("X-Forwarded-Host") {
t.Errorf("Host - want: %s, got: %s", request.Host, upstream.Header.Get("X-Forwarded-Host"))
}
}