PHP Request::parseAccept方法代码示例

 /**
  * Determines which content-types the client prefers. If no parameters are given,
  * the single content-type that the client most likely prefers is returned. If $type is
  * an array, the first item in the array that the client accepts is returned.
  * Preference is determined primarily by the file extension parsed by the Router
  * if provided, and secondarily by the list of content-types provided in
  * HTTP_ACCEPT.
  *
  * @param string|array $type An optional array of 'friendly' content-type names, i.e.
  *   'html', 'xml', 'js', etc.
  * @return mixed If $type is null or not provided, the first content-type in the
  *    list, based on preference, is returned. If a single type is provided
  *    a boolean will be returned if that type is preferred.
  *    If an array of types are provided then the first preferred type is returned.
  *    If no type is provided the first preferred type is returned.
  * @see RequestHandlerComponent::setContent()
  */
 public function prefers($type = null)
 {
     $acceptRaw = $this->request->parseAccept();
     if (empty($acceptRaw)) {
         return $this->ext;
     }
     $accepts = $this->response->mapType(array_shift($acceptRaw));
     if (!$type) {
         if (empty($this->ext) && !empty($accepts)) {
             return $accepts[0];
         }
         return $this->ext;
     }
     $types = (array) $type;
     if (count($types) === 1) {
         if (!empty($this->ext)) {
             return in_array($this->ext, $types);
         }
         return in_array($types[0], $accepts);
     }
     $intersect = array_values(array_intersect($accepts, $types));
     if (empty($intersect)) {
         return false;
     }
     return $intersect[0];
 }

 /**
  * Test that parsing accept headers with invalid syntax works.
  *
  * The header used is missing a q value for application/xml.
  *
  * @return void
  */
 public function testParseAcceptInvalidSyntax()
 {
     $request = new Request(['environment' => ['url' => '/', 'HTTP_ACCEPT' => 'text/html,application/xhtml+xml,application/xml;image/png,image/jpeg,image/*;q=0.9,*/*;q=0.8']], false);
     $result = $request->parseAccept();
     $expected = ['1.0' => ['text/html', 'application/xhtml+xml', 'application/xml', 'image/jpeg'], '0.9' => ['image/*'], '0.8' => ['*/*']];
     $this->assertEquals($expected, $result);
 }

 /**
  * Set the extension based on the accept headers.
  * Compares the accepted types and configured extensions.
  * If there is one common type, that is assigned as the ext/content type for the response.
  * The type with the highest weight will be set. If the highest weight has more
  * than one type matching the extensions, the order in which extensions are specified
  * determines which type will be set.
  *
  * If html is one of the preferred types, no content type will be set, this
  * is to avoid issues with browsers that prefer HTML and several other content types.
  *
  * @param \Cake\Network\Request $request The request instance.
  * @param \Cake\Network\Response $response The response instance.
  * @return void
  */
 protected function _setExtension($request, $response)
 {
     $accept = $request->parseAccept();
     if (empty($accept)) {
         return;
     }
     $accepts = $response->mapType($accept);
     $preferedTypes = current($accepts);
     if (array_intersect($preferedTypes, ['html', 'xhtml'])) {
         return;
     }
     $extensions = Router::extensions();
     foreach ($accepts as $types) {
         $ext = array_intersect($extensions, $types);
         if ($ext) {
             $this->ext = current($ext);
             break;
         }
     }
 }

 /**
  * Set the extension based on the accept headers.
  * Compares the accepted types and configured extensions.
  * If there is one common type, that is assigned as the ext/content type for the response.
  * The type with the highest weight will be set. If the highest weight has more
  * than one type matching the extensions, the order in which extensions are specified
  * determines which type will be set.
  *
  * If html is one of the preferred types, no content type will be set, this
  * is to avoid issues with browsers that prefer HTML and several other content types.
  *
  * @param \Cake\Network\Request $request The request instance.
  * @param \Cake\Network\Response $response The response instance.
  * @return void
  */
 protected function _setExtension($request, $response)
 {
     $accept = $request->parseAccept();
     if (empty($accept)) {
         return;
     }
     $accepts = $response->mapType($accept);
     $preferredTypes = current($accepts);
     if (array_intersect($preferredTypes, ['html', 'xhtml'])) {
         return;
     }
     $extensions = array_unique(array_merge(Router::extensions(), array_keys($this->config('viewClassMap'))));
     foreach ($accepts as $types) {
         $ext = array_intersect($extensions, $types);
         if (!empty($ext)) {
             $this->ext = current($ext);
             break;
         }
     }
 }