/**
* An overview of how to use the JsonRpcRequest class.
* @test
*/
public function synopsis()
{
/* Handles JSON-RPC 1.0 requests. */
$request = new JsonRpcRequest('MyService', (object) array('method' => 'remoteProcedure', 'params' => array(1, 2, 3), 'id' => 'uniqueidentifier'));
$this->assertEquals('POST', $request->getVerb());
$this->assertEquals('remoteProcedure', $request->getMethod());
$this->assertEquals('1.0', $request->getVersion());
$this->assertEquals(array(1, 2, 3), $request->getParameters());
$this->assertEquals('uniqueidentifier', $request->getIdentifier());
$this->assertNull($request->getPost('anything'));
// Post should be ignored.
/* Handles JSON-RPC 2.0 requests. */
$request = new JsonRpcRequest('MyService', (object) array('jsonrpc' => '2.0', 'method' => 'remoteProcedure', 'id' => 'uniqueidentifier'));
$this->assertEquals('2.0', $request->getVersion());
$this->assertEquals(array(), $request->getParameters());
/* Catches invalid request format. */
$request = new JsonRpcRequest('MyService', (object) array('jsonrpc' => '2.0', 'method' => null));
$this->assertFalse($request->isValid());
}
/**
* Construct a Response from JSON-RPC style result, error, and JSON-RPC request.
*
* @param mixed $result The result of the remote procedure call.
* @param Exception $error The error, as an exception. (Requires code and message.)
* @param JsonRpcRequest $request The request that led to the generation of this response.
*/
public function __construct($result, Exception $error = null, JsonRpcRequest $request = null)
{
$response = new stdClass();
/* JSON-RPC spec: either error or result, never both. */
if ($error) {
$response->error = (object) array('code' => $error->getCode(), 'message' => $error->getMessage());
} else {
$response->result = $result;
}
if ($request) {
/* 1.0: omit version, 2.0 and newer, echo back version. */
if ($request->getVersion() != "1.0") {
$response->jsonrpc = $request->getVersion();
}
/* For notifications (null id), return nothing. Otherwise, pass back the id. */
if ($request->getIdentifier() === null) {
$response = "";
} else {
$response->id = $request->getIdentifier();
}
}
parent::__construct($response);
}
/**
* Invokes a method on a service class, based on the raw JSON-RPC request.
*
* @param mixed $service The service being invoked.
* @param Vectorface\SnappyRouter\Request\JsonRpcRequest $request The request
* to invoke.
* @return JsonRpcResponse A response based on the result of the procedure call.
*/
private function invokeMethod($service, JsonRpcRequest $request)
{
if (false === $request->isValid()) {
/* Note: Method isn't known, so invocation hooks aren't called. */
return new JsonRpcResponse(null, new Exception('The JSON sent is not a valid Request object', self::ERR_INVALID_REQUEST));
}
$action = $request->getAction();
$this->invokePluginsHook('afterServiceSelected', array($this, $request, $service, $action));
$this->invokePluginsHook('beforeMethodInvoked', array($this, $request, $service, $action));
try {
$response = new JsonRpcResponse(call_user_func_array(array($service, $action), $request->getParameters()), null, $request);
} catch (Exception $e) {
$error = new Exception($e->getMessage(), self::ERR_INTERNAL_ERROR);
$response = new JsonRpcResponse(null, $error, $request);
}
$this->invokePluginsHook('afterMethodInvoked', array($this, $request, $service, $action, $response));
return $response;
}
