func (f *forwarder) Apply(w http.ResponseWriter, req *http.Request, next filters.Next) error {
op := ops.Begin("proxy_http")
defer op.End()
// Create a copy of the request suitable for our needs
reqClone, err := f.cloneRequest(req, req.URL)
if err != nil {
return op.FailIf(filters.Fail("Error forwarding from %v to %v: %v", req.RemoteAddr, req.Host, err))
}
f.Rewriter.Rewrite(reqClone)
if log.IsTraceEnabled() {
reqStr, _ := httputil.DumpRequest(req, false)
log.Tracef("Forwarder Middleware received request:\n%s", reqStr)
reqStr2, _ := httputil.DumpRequest(reqClone, false)
log.Tracef("Forwarder Middleware forwarding rewritten request:\n%s", reqStr2)
}
// Forward the request and get a response
start := time.Now().UTC()
response, err := f.RoundTripper.RoundTrip(reqClone)
if err != nil {
return op.FailIf(filters.Fail("Error forwarding from %v to %v: %v", req.RemoteAddr, req.Host, err))
}
log.Debugf("Round trip: %v, code: %v, duration: %v",
reqClone.URL, response.StatusCode, time.Now().UTC().Sub(start))
if log.IsTraceEnabled() {
respStr, _ := httputil.DumpResponse(response, true)
log.Tracef("Forward Middleware received response:\n%s", respStr)
}
// Forward the response to the origin
copyHeadersForForwarding(w.Header(), response.Header)
w.WriteHeader(response.StatusCode)
// It became nil in a Co-Advisor test though the doc says it will never be nil
if response.Body != nil {
buf := buffers.Get()
defer buffers.Put(buf)
_, err = io.CopyBuffer(w, response.Body, buf)
if err != nil {
log.Debug(err)
}
response.Body.Close()
}
return filters.Stop()
}
func (f *commonFilter) Apply(w http.ResponseWriter, req *http.Request, next filters.Next) error {
if !f.AllowLocalhost && !f.isException(req.URL.Host) {
reqAddr, err := net.ResolveTCPAddr("tcp", req.Host)
// If there was an error resolving is probably because it wasn't an address
// in the form localhost:port
if err == nil {
if reqAddr.IP.IsLoopback() {
return filters.Fail("%v requested loopback address %v (%v)", req.RemoteAddr, req.Host, reqAddr)
}
for _, ip := range f.localIPs {
if reqAddr.IP.Equal(ip) {
return filters.Fail("%v requested local address %v (%v)", req.RemoteAddr, req.Host, reqAddr)
}
}
}
}
return next()
}
