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<?php
namespace PhpConsole\ClientEmulator;
class Connector {
const POST_VAR_NAME = '__PHP_Console_emulator';
const HEADERS_LIMIT = 90000; // default CURL headers limit
protected $serverWrapperUrl;
protected $secretKey;
protected $scriptsBaseDir;
public function __construct($serverWrapperUrl, $secretKey, $scriptsBaseDir) {
$this->serverWrapperUrl = $serverWrapperUrl;
$this->secretKey = $secretKey;
$this->scriptsBaseDir = realpath($scriptsBaseDir);
}
public function getScriptsBaseDir() {
return $this->scriptsBaseDir;
}
public function getPostDataSignature($rawPostData) {
return hash('sha256', $rawPostData . $this->secretKey);
}
/**
* @param Request $request
* @param bool $postponedResponseId
* @param null $postponedOutput
* @throws RequestFailed
* @return Response
*/
public function sendRequest(Request $request, $postponedResponseId = null, $postponedOutput = null) {
$clientData = $request->getClientData();
if($clientData) {
$request->cookies[\PhpConsole\Connector::CLIENT_INFO_COOKIE] = base64_encode(json_encode($clientData));
}
if($postponedResponseId) {
$request->postData[\PhpConsole\Connector::POST_VAR_NAME] = array(
'getPostponedResponse' => $postponedResponseId
);
}
$request->postData[static::POST_VAR_NAME] = array(
'scripts' => $request->getScripts(),
);
$postData = $request->postData;
array_walk_recursive($postData, function (&$item) {
if(!is_object($item)) {
$item = base64_encode($item);
}
});
$rawPostData = serialize($postData);
$url = $request->isSsl ? str_replace('http://', 'https://', $this->serverWrapperUrl) : $this->serverWrapperUrl;
$curlOptions = array(
CURLOPT_URL => $url . '?signature=' . $this->getPostDataSignature($rawPostData),
CURLOPT_CONNECTTIMEOUT => 2,
CURLOPT_TIMEOUT => 5,
CURLOPT_HEADER => true,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => $rawPostData,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_MAXREDIRS => 3,
CURLOPT_SSL_VERIFYPEER => false,
CURLOPT_SSL_VERIFYHOST => false,
);
if($request->cookies) {
$cookiesData = array();
foreach($request->cookies as $name => $value) {
$cookiesData[] = rawurlencode($name) . '=' . rawurlencode($value);
}
$curlOptions[CURLOPT_COOKIE] = implode('; ', $cookiesData);
}
$curlHandle = curl_init();
curl_setopt_array($curlHandle, $curlOptions);
$responseData = curl_exec($curlHandle);
$code = curl_getinfo($curlHandle, CURLINFO_HTTP_CODE);
$error = curl_error($curlHandle);
$responseHeaders = substr($responseData, 0, curl_getinfo($curlHandle, CURLINFO_HEADER_SIZE));
if(substr($responseHeaders, -1) !== "\n") { // because curl_getinfo($curlHandle, CURLINFO_HEADER_SIZE) is bugged on some PHP versions
$responseHeaders = substr($responseData, 0, strpos($responseData, PHP_EOL . PHP_EOL));
}
$responseOutput = substr($responseData, strlen($responseHeaders));
curl_close($curlHandle);
$response = new Response();
$response->code = $code;
$response->output = (string)($postponedResponseId ? $postponedOutput : $responseOutput);
$response->headerData = $this->parseHeaderData($responseHeaders);
$response->cookies = $this->parseCookies($responseHeaders);
try {
if($error || ($code != 200 && $code != 204 && $code != 500)) {
throw new \Exception('Connection to "' . $this->serverWrapperUrl . '" failed with code "' . $code . '" and error: ' . $error . '" and response: "' . $responseOutput, $code);
}
$packageEncodedData = $postponedResponseId ? $responseOutput : $response->headerData;
if($packageEncodedData) {
$packageData = $this->jsonDecode($packageEncodedData);
if(!empty($packageData['isPostponed'])) {
$request->cookies = $response->cookies;
$response = $this->sendRequest($request, $packageData['id'], $responseOutput);
$response->isPostponed = true;
return $response;
}
$response->package = $this->initResponsePackage($packageData);
}
}
catch(\Exception $exception) {
throw new RequestFailed($exception, $request, $response);
}
return $response;
}
public function getScriptPath($alias) {
return $this->scriptsBaseDir . DIRECTORY_SEPARATOR . basename($alias) . '.php';
}
public function handleClientEmulatorRequest() {
$_POST = unserialize(file_get_contents('php://input'));
if($_POST === false) {
throw new \Exception('Wrong format of raw POST data');
}
array_walk_recursive($_POST, function (&$item) {
if(!is_object($item)) {
$item = base64_decode($item);
}
});
if(!isset($_GET['signature']) || $this->getPostDataSignature(file_get_contents('php://input')) != $_GET['signature']) {
throw new \Exception('Wrong request signature');
}
if(!empty($_POST[static::POST_VAR_NAME]['scripts'])) {
foreach($_POST[static::POST_VAR_NAME]['scripts'] as $script) {
$scriptPath = $this->getScriptPath($script['alias']);
if(!is_file($scriptPath)) {
throw new \Exception('Script with alias "' . $script['alias'] . '" not found in ' . $scriptPath);
}
$this->runScript($script['alias'], isset($script['params']) ? $script['params'] : array());
}
}
}
protected function runScript($_alias, $_params) {
extract($_params, EXTR_SKIP);
require($this->getScriptPath($_alias));
}
protected function parseHeaderData($headersData) {
if(preg_match_all('/\n\s*' . preg_quote(\PhpConsole\Connector::HEADER_NAME) . '\s*:\s*(.*?)[\r\n]/', $headersData, $m)) {
if(count($m[1]) > 1) {
throw new \Exception('There is more than one "' . \PhpConsole\Connector::HEADER_NAME . '" header');
}
return rawurldecode($m[1][0]);
}
elseif(preg_match_all('/\n\s*' . preg_quote(\PhpConsole\Connector::POSTPONE_HEADER_NAME) . '\s*:\s*(.*?)[\r\n]/', $headersData, $m)) {
if(count($m[1]) > 1) {
throw new \Exception('There is more than one "' . \PhpConsole\Connector::POSTPONE_HEADER_NAME . '" header');
}
return rawurldecode($m[1][0]);
}
}
protected function parseCookies($headersData) {
$cookies = array();
preg_match_all('/Set-Cookie:\s*(.*?)=(.*?);/i', $headersData, $m);
foreach($m[1] as $i => $name) {
if($m[2][$i] != 'deleted') {
$cookies[$name] = rawurldecode($m[2][$i]);
}
}
return $cookies;
}
/**
*
* @param array $packageData
* @throws \Exception
* @return \PhpConsole\Response|null
*/
protected function initResponsePackage(array $packageData) {
$package = new \PhpConsole\Response($packageData);
if($package->auth) {
$package->auth = new \PhpConsole\ServerAuthStatus($package->auth);
}
return $package;
}
protected function jsonDecode($json) {
$data = @json_decode($json, true);
if(!$data || json_last_error()) {
throw new \Exception('Decoding json failed with error code ' . json_last_error() . '. JSON: ' . $json);
}
return $data;
}
}
class RequestFailed extends \Exception {
public $request;
public $response;
function __construct(\Exception $previous, Request $request, Response $response) {
$this->request = $request;
$this->response = $response;
parent::__construct('ClientEmulator request failed with error: ' . $previous->getMessage(), 0, $previous);
}
}
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