Function sendReq

test/angular/1.6/angular.js:12653–12805

* Makes the request. * * !!! ACCESSES CLOSURE VARS: * $httpBackend, defaults, $log, $rootScope, defaultCache, $http.pendingRequests

(config, reqData)

     * $httpBackend, defaults, $log, $rootScope, defaultCache, $http.pendingRequests
     */
    function sendReq(config, reqData) {
      var deferred = $q.defer(),
          promise = deferred.promise,
          cache,
          cachedResp,
          reqHeaders = config.headers,
          isJsonp = lowercase(config.method) === 'jsonp',
          url = config.url;

      if (isJsonp) {
        // JSONP is a pretty sensitive operation where we're allowing a script to have full access to
        // our DOM and JS space.  So we require that the URL satisfies SCE.RESOURCE_URL.
        url = $sce.getTrustedResourceUrl(url);
      } else if (!isString(url)) {
        // If it is not a string then the URL must be a $sce trusted object
        url = $sce.valueOf(url);
      }

      url = buildUrl(url, config.paramSerializer(config.params));

      if (isJsonp) {
        // Check the url and add the JSONP callback placeholder
        url = sanitizeJsonpCallbackParam(url, config.jsonpCallbackParam);
      }

      $http.pendingRequests.push(config);
      promise.then(removePendingReq, removePendingReq);

      if ((config.cache || defaults.cache) && config.cache !== false &&
          (config.method === 'GET' || config.method === 'JSONP')) {
        cache = isObject(config.cache) ? config.cache
            : isObject(/** @type {?} */ (defaults).cache)
              ? /** @type {?} */ (defaults).cache
              : defaultCache;
      }

      if (cache) {
        cachedResp = cache.get(url);
        if (isDefined(cachedResp)) {
          if (isPromiseLike(cachedResp)) {
            // cached request has already been sent, but there is no response yet
            cachedResp.then(resolvePromiseWithResult, resolvePromiseWithResult);
          } else {
            // serving from cache
            if (isArray(cachedResp)) {
              resolvePromise(cachedResp[1], cachedResp[0], shallowCopy(cachedResp[2]), cachedResp[3], cachedResp[4]);
            } else {
              resolvePromise(cachedResp, 200, {}, 'OK', 'complete');
            }
          }
        } else {
          // put the promise for the non-transformed response into cache as a placeholder
          cache.put(url, promise);
        }
      }


      // if we won't have the response in cache, set the xsrf headers and