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<?php
/*
* Copyright 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
require_once realpath(dirname(__FILE__) . '/../../../autoload.php');
/**
* This class implements the RESTful transport of apiServiceRequest()'s
*
* @author Chris Chabot <chabotc@google.com>
* @author Chirag Shah <chirags@google.com>
*/
class Postman_Google_Http_REST
{
/**
* Executes a Postman_Google_Http_Request
*
* @param Postman_Google_Client $client
* @param Postman_Google_Http_Request $req
* @return array decoded result
* @throws Postman_Google_Service_Exception on server side error (ie: not authenticated,
* invalid or malformed post body, invalid url)
*/
public static function execute(Postman_Google_Client $client, Postman_Google_Http_Request $req)
{
$httpRequest = $client->getIo()->makeRequest($req);
$httpRequest->setExpectedClass($req->getExpectedClass());
return self::decodeHttpResponse($httpRequest, $client);
}
/**
* Decode an HTTP Response.
* @static
* @throws Postman_Google_Service_Exception
* @param Postman_Google_Http_Request $response The http response to be decoded.
* @param Postman_Google_Client $client
* @return mixed|null
*/
public static function decodeHttpResponse($response, Postman_Google_Client $client = null)
{
$code = $response->getResponseHttpCode();
$body = $response->getResponseBody();
$decoded = null;
if ((intVal($code)) >= 300) {
$decoded = json_decode($body, true);
$err = 'Error calling ' . $response->getRequestMethod() . ' ' . $response->getUrl();
if (isset($decoded['error']) &&
isset($decoded['error']['message']) &&
isset($decoded['error']['code'])) {
// if we're getting a json encoded error definition, use that instead of the raw response
// body for improved readability
$err .= ": ({$decoded['error']['code']}) {$decoded['error']['message']}";
} else {
$err .= ": ($code) $body";
}
$errors = null;
// Specific check for APIs which don't return error details, such as Blogger.
if (isset($decoded['error']) && isset($decoded['error']['errors'])) {
$errors = $decoded['error']['errors'];
}
if ($client) {
$client->getLogger()->error(
$err,
array('code' => $code, 'errors' => $errors)
);
}
throw new Postman_Google_Service_Exception($err, $code, null, $errors);
}
// Only attempt to decode the response, if the response code wasn't (204) 'no content'
if ($code != '204') {
$decoded = json_decode($body, true);
if ($decoded === null || $decoded === "") {
$error = "Invalid json in service response: $body";
if ($client) {
$client->getLogger()->error($error);
}
throw new Postman_Google_Service_Exception($error);
}
if ($response->getExpectedClass()) {
$class = $response->getExpectedClass();
$decoded = new $class($decoded);
}
}
return $decoded;
}
/**
* Parse/expand request parameters and create a fully qualified
* request uri.
* @static
* @param string $servicePath
* @param string $restPath
* @param array $params
* @return string $requestUrl
*/
public static function createRequestUri($servicePath, $restPath, $params)
{
$requestUrl = $servicePath . $restPath;
$uriTemplateVars = array();
$queryVars = array();
foreach ($params as $paramName => $paramSpec) {
if ($paramSpec['type'] == 'boolean') {
$paramSpec['value'] = ($paramSpec['value']) ? 'true' : 'false';
}
if ($paramSpec['location'] == 'path') {
$uriTemplateVars[$paramName] = $paramSpec['value'];
} else if ($paramSpec['location'] == 'query') {
if (isset($paramSpec['repeated']) && is_array($paramSpec['value'])) {
foreach ($paramSpec['value'] as $value) {
$queryVars[] = $paramName . '=' . rawurlencode($value);
}
} else {
$queryVars[] = $paramName . '=' . rawurlencode($paramSpec['value']);
}
}
}
if (count($uriTemplateVars)) {
$uriTemplateParser = new Postman_Google_Utils_URITemplate();
$requestUrl = $uriTemplateParser->parse($requestUrl, $uriTemplateVars);
}
if (count($queryVars)) {
$requestUrl .= '?' . implode($queryVars, '&');
}
return $requestUrl;
}
}
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