Fix update oxy

Gopkg.lock

@@ -1322,7 +1322,7 @@
     "roundrobin",
     "utils"
   ]
-  revision = "fe51048067db50958154cd4040da878b10002a3a"
+  revision = "7d94d212f808222b72fd0b8bb171bfcd4e27ffca"
 
 [[projects]]
   name = "github.com/vulcand/predicate"

integration/fixtures/websocket/config.toml

@@ -19,5 +19,6 @@ logLevel = "DEBUG"
 [frontends]
   [frontends.frontend1]
   backend = "backend1"
+  passHostHeader = true
     [frontends.frontend1.routes.test_1]
     rule = "PathPrefix:/ws"

integration/fixtures/websocket/config_https.toml

@@ -24,5 +24,6 @@ insecureSkipVerify=true
 [frontends]
   [frontends.frontend1]
   backend = "backend1"
+  passHostHeader = true
     [frontends.frontend1.routes.test_1]
     rule = "Path:/echo,/ws"

vendor/github.com/vulcand/oxy/buffer/buffer.go

@@ -330,7 +330,7 @@ func (b *Buffer) copyRequest(req *http.Request, body io.ReadCloser, bodySize int
 	o.TransferEncoding = []string{}
 	// http.Transport will close the request body on any error, we are controlling the close process ourselves, so we override the closer here
 	if body == nil {
-		o.Body = nil
+		o.Body = ioutil.NopCloser(req.Body)
 	} else {
 		o.Body = ioutil.NopCloser(body.(io.Reader))
 	}

vendor/github.com/vulcand/oxy/forward/fwd.go

@@ -491,6 +491,9 @@ func (f *httpForwarder) copyWebSocketRequest(req *http.Request) (outReq *http.Re
 	outReq.RequestURI = "" // Outgoing request should not have RequestURI
 
 	outReq.URL.Host = req.URL.Host
+	if !f.passHost {
+		outReq.Host = req.URL.Host
+	}
 
 	outReq.Header = make(http.Header)
 	// gorilla websocket use this header to set the request.Host tested in checkSameOrigin