Fix for passing body from request in text streaming mode

The body was not being passed through to the upstream_url when
in http mode. This commit has been tested and shown to pass
the body.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Author: alexellis

executor/http_runner.go

@@ -98,12 +98,11 @@ func (f *HTTPFunctionRunner) Run(req FunctionRequest, contentLength int64, r *ht
 		upstreamURL += r.RequestURI
 	}
 
-	var body io.Reader
+	body := r.Body
+
 	if f.BufferHTTPBody {
 		reqBody, _ := io.ReadAll(r.Body)
-		body = bytes.NewReader(reqBody)
-	} else {
-		body = r.Body
+		body = io.NopCloser(bytes.NewReader(reqBody))
 	}
 
 	request, err := http.NewRequest(r.Method, upstreamURL, body)
@@ -130,11 +129,10 @@ func (f *HTTPFunctionRunner) Run(req FunctionRequest, contentLength int64, r *ht
 	}
 	defer cancel()
 
-	if r.Header.Get("Accept") == "text/event-stream" {
-
+	if strings.HasPrefix(r.Header.Get("Accept"), "text/event-stream") {
 		ww := fhttputil.NewHttpWriteInterceptor(w)
 
-		f.ReverseProxy.ServeHTTP(ww, request)
+		f.ReverseProxy.ServeHTTP(w, r)
 		done := time.Since(startedTime)
 
 		log.Printf("%s %s - %d - Bytes: %s (%.4fs)", r.Method, r.RequestURI, ww.Status(), units.HumanSize(float64(ww.BytesWritten())), done.Seconds())

main.go

@@ -342,6 +342,8 @@ func getEnvironment(r *http.Request) []string {
 }
 
 func makeHTTPRequestHandler(watchdogConfig config.WatchdogConfig, prefixLogs bool, logBufferSize int) func(http.ResponseWriter, *http.Request) {
+	upstreamURL, _ := url.Parse(watchdogConfig.UpstreamURL)
+
 	commandName, arguments := watchdogConfig.Process()
 	functionInvoker := executor.HTTPFunctionRunner{
 		ExecTimeout:    watchdogConfig.ExecTimeout,
@@ -352,6 +354,8 @@ func makeHTTPRequestHandler(watchdogConfig config.WatchdogConfig, prefixLogs boo
 		LogBufferSize:  logBufferSize,
 		ReverseProxy: &httputil.ReverseProxy{
 			Director: func(req *http.Request) {
+				req.URL.Host = upstreamURL.Host
+				req.URL.Scheme = "http"
 			},
 			ErrorHandler: func(w http.ResponseWriter, r *http.Request, err error) {
 			},
@@ -378,7 +382,6 @@ func makeHTTPRequestHandler(watchdogConfig config.WatchdogConfig, prefixLogs boo
 		req := executor.FunctionRequest{
 			Process:      commandName,
 			ProcessArgs:  arguments,
-			InputReader:  r.Body,
 			OutputWriter: w,
 		}