Add debug logging when receiving an oauth redirect (#3916)

api/oauth.go

@@ -290,6 +290,8 @@ func completeOAuth(c *Context, w http.ResponseWriter, r *http.Request) {
 	params := mux.Vars(r)
 	service := params["service"]
 
+	l4g.Debug(utils.T("api.oauth.receive_redirect.debug", map[string]interface{}{"URL": r.URL.String()}))
+
 	code := r.URL.Query().Get("code")
 	state := r.URL.Query().Get("state")
 

i18n/en.json

@@ -1005,6 +1005,10 @@
     "id": "api.oauth.allow_oauth.bad_client.app_error",
     "translation": "invalid_request: Bad client_id"
   },
+  {
+    "id": "api.oauth.receive_redirect.debug",
+    "translation": "OAuth2 redirect: {{.URL}}"
+  },
   {
     "id": "api.oauth.allow_oauth.bad_redirect.app_error",
     "translation": "invalid_request: Missing or bad redirect_uri"