/**
* Returns a responder that supports HTTP requests.
*
* @param HttpRequest $request the request to satisfy.
*/
private static function getHttpResponder(HttpRequest $request)
{
$responder = null;
$responderClassName = $request->getResponderClassName();
if (class_exists($responderClassName)) {
$responder = new $responderClassName($request);
Logger::get()->debug("Responder '{$responderClassName}' is ready.");
} else {
throw new \Eix\Services\Net\Http\NotFoundException("'{$responderClassName}' responder not found.");
}
return $responder;
}
/**
* Builds a request that describes an error condition, to be used when a
* request could not be created.
*/
public function __construct()
{
parent::__construct();
// Method is always GET.
$this->method = self::HTTP_METHOD_GET;
// Cancel the URI parsing.
$this->uri = false;
}
/**
* Returns a function name that represents the method and response's
* expected content type.
*
* e.g. httpGetForHtml represents a GET request expecting HTML back.
* e.g. httpPostForJson represents a POST request expecting JSON back.
* e.g. httpPutForAll represents a PUT request expecting whatever back.
*/
private function getFunctionName($httpMethod)
{
if ($this->getRequest()) {
$functionName = null;
// Prefix starts with 'http'.
$functionPrefix = 'http';
// The HTTP method is then appended.
$functionPrefix .= ucfirst(strtolower($httpMethod));
// If an action has been captured in the URI, append it too.
$action = $this->getRequest()->getParameter('action');
if ($action) {
$functionPrefix .= ucfirst($action);
// If there is an action, check whether the function is likely
// to exist.
if (!$this->isBaseFunctionAvailable($functionPrefix)) {
throw new \Eix\Services\Net\Http\NotFoundException("This responder does not have any methods starting with {$functionPrefix}.");
}
}
$found = false;
$acceptedContentTypes = $this->getRequest()->getAcceptedContentTypes();
// Append a token to the function name, based on the requested content
foreach ($acceptedContentTypes as $contentType => $quality) {
try {
$contentTypeToken = \Eix\Core\Requests\Http::getContentTypeToken($contentType);
// Append the token for the response's expected content type.
$functionName = $functionPrefix . 'For' . $contentTypeToken;
Logger::get()->debug("Trying {$functionName} for {$contentType}...");
// Check whether a method with that name exists.
if (method_exists($this, $functionName)) {
return $functionName;
}
} catch (\InvalidArgumentException $exception) {
// This content type is invalid, keep on checking.
}
}
// Although a base method exists, it does not for this content type,
// so that's a 406.
throw new \Eix\Services\Net\Http\NotAcceptableException("This responder cannot serve content type {$contentType}.");
} else {
// If there is no request, return the generic responder method.
return 'httpGetForAll';
}
}
