fix: req.RequestURI unreliable

Signed-off-by: Eric Lin <38420555+Ezzahhh@users.noreply.github.com>

Author: Ezzahhh

main.go

@@ -85,7 +85,7 @@ func (e *VouchPlugin) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 		authReq.AddCookie(cookie)
 	}
 	// Pass X-Original-URI so Vouch knows what we accessed
-	authReq.Header.Set("X-Original-URI", req.RequestURI)
+	authReq.Header.Set("X-Original-URI", req.URL.RequestURI())
 	// Pass other standard headers
 	if req.TLS != nil || req.Header.Get("X-Forwarded-Proto") == "https" {
 		authReq.Header.Set("X-Forwarded-Proto", "https")
@@ -137,7 +137,7 @@ func (e *VouchPlugin) handleRedirect(rw http.ResponseWriter, req *http.Request,
 	if h := req.Header.Get("X-Forwarded-Host"); h != "" {
 		host = h
 	}
-	fullOriginalURL := fmt.Sprintf("%s://%s%s", scheme, host, req.RequestURI)
+	fullOriginalURL := fmt.Sprintf("%s://%s%s", scheme, host, req.URL.RequestURI())
 
 	// 2. REPLICATE: The auth_request_set logic
 	// Nginx: auth_request_set $auth_resp_failcount $upstream_http_x_vouch_failcount;