/**
  * @visible for testing
  * Process an http request that contains an enclosed entity.
  * @param apiHttpRequest $request
  * @return apiHttpRequest Processed request with the enclosed entity.
  */
 public function processEntityRequest(apiHttpRequest $request)
 {
     $postBody = $request->getPostBody();
     $contentType = $request->getRequestHeader("content-type");
     // Set the default content-type as application/x-www-form-urlencoded.
     if (false == $contentType) {
         $contentType = self::FORM_URLENCODED;
         $request->setRequestHeaders(array('content-type' => $contentType));
     }
     // Force the payload to match the content-type asserted in the header.
     if ($contentType == self::FORM_URLENCODED && is_array($postBody)) {
         $postBody = http_build_query($postBody, '', '&');
         $request->setPostBody($postBody);
     }
     // Make sure the content-length header is set.
     if (!$postBody || is_string($postBody)) {
         $postsLength = strlen($postBody);
         $request->setRequestHeaders(array('content-length' => $postsLength));
     }
     return $request;
 }
 private function getResumeUri(apiHttpRequest $httpRequest)
 {
     $result = null;
     $body = $httpRequest->getPostBody();
     if ($body) {
         $httpRequest->setRequestHeaders(array('content-type' => 'application/json; charset=UTF-8', 'content-length' => apiUtils::getStrLen($body), 'x-upload-content-type' => $this->mimeType, 'expect' => ''));
     }
     $response = apiClient::$io->makeRequest($httpRequest);
     $location = $response->getResponseHeader('location');
     $code = $response->getResponseHttpCode();
     if (200 == $code && true == $location) {
         return $location;
     }
     throw new apiException("Failed to start the resumable upload");
 }