fix: fix graphiql request failure

graphene_django/static/graphene_django/graphiql.js

@@ -60,25 +60,7 @@
 
   function trueLambda() { return true; };
 
-  var fetcher = GraphiQL.createFetcher({
-    url: fetchURL,
-    wsClient: graphqlWs.createClient({
-      url: subscribeURL,
-      shouldRetry: trueLambda,
-      lazy: true,
-    })
-  })
-
-  function graphQLFetcher(graphQLParams, opts) {
-    if (typeof opts === 'undefined') {
-      opts = {};
-    }
-    var headers = opts.headers || {};
-    headers['Accept'] = headers['Accept'] || 'application/json';
-    headers['Content-Type'] = headers['Content-Type'] || 'application/json';
-
-    // Parse the cookie value for a CSRF token
-    var csrftoken;
+  var headers = {};
   var cookies = ("; " + document.cookie).split("; csrftoken=");
   if (cookies.length == 2) {
     csrftoken = cookies.pop().split(";").shift();
@@ -89,10 +71,15 @@
     headers['X-CSRFToken'] = csrftoken
   }
 
-    opts.headers = headers
-
-    return fetcher(graphQLParams, opts)
-  }
+  var graphQLFetcher = GraphiQL.createFetcher({
+    url: fetchURL,
+    wsClient: graphqlWs.createClient({
+      url: subscribeURL,
+      shouldRetry: trueLambda,
+      lazy: true,
+    }),
+    headers: headers
+  })
 
   // When the query and variables string is edited, update the URL bar so
   // that it can be easily shared.