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PhutilAWSFuture.php
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Fri, Apr 25, 21:44

PhutilAWSFuture.php
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<?php
/**
* @group aws
*/
abstract class PhutilAWSFuture extends FutureProxy {
private $future;
private $awsAccessKey;
private $awsPrivateKey;
private $awsRegion;
private $builtRequest;
private $params;
abstract public function getServiceName();
public function __construct() {
parent::__construct(null);
}
public function setAWSKeys($access, $private) {
$this->awsAccessKey = $access;
$this->awsPrivateKey = $private;
return $this;
}
public function getAWSAccessKey() {
return $this->awsAccessKey;
}
public function getAWSPrivateKey() {
return $this->awsPrivateKey;
}
public function getAWSRegion() {
return $this->awsRegion;
}
public function setAWSRegion($region) {
$this->awsRegion = $region;
return $this;
}
public function getHost() {
$host = $this->getServiceName().'.'.$this->awsRegion.'.amazonaws.com';
return $host;
}
public function setRawAWSQuery($action, array $params = array()) {
$this->params = $params;
$this->params['Action'] = $action;
return $this;
}
protected function getProxiedFuture() {
if (!$this->future) {
$params = $this->params;
if (!$this->params) {
throw new Exception('You must setRawAWSQuery()!');
}
if (!$this->getAWSAccessKey()) {
throw new Exception('You must setAWSKeys()!');
}
$params['AWSAccessKeyId'] = $this->getAWSAccessKey();
$params['Version'] = '2011-12-15';
$params['Timestamp'] = date('c');
$params = $this->sign($params);
$uri = new PhutilURI('http://'.$this->getHost().'/');
$uri->setQueryParams($params);
$this->future = new HTTPFuture($uri);
}
return $this->future;
}
protected function didReceiveResult($result) {
list($status, $body, $headers) = $result;
try {
$xml = @(new SimpleXMLElement($body));
} catch (Exception $ex) {
$xml = null;
}
if ($status->isError() || !$xml) {
if (!($status instanceof HTTPFutureResponseStatusHTTP)) {
throw $status;
}
$params = array(
'body' => $body,
);
if ($xml) {
$params['RequestID'] = $xml->RequestID[0];
foreach ($xml->Errors[0] as $error) {
$params['Errors'][] = array($error->Code, $error->Message);
}
}
throw new PhutilAWSException($status->getStatusCode(), $params);
}
return $xml;
}
/**
* http://bit.ly/wU0JFh
*/
private function sign(array $params) {
$params['SignatureMethod'] = 'HmacSHA256';
$params['SignatureVersion'] = '2';
ksort($params);
$pstr = array();
foreach ($params as $key => $value) {
$pstr[] = rawurlencode($key).'='.rawurlencode($value);
}
$pstr = implode('&', $pstr);
$sign = "GET"."\n".
strtolower($this->getHost())."\n".
"/"."\n".
$pstr;
$hash = hash_hmac(
'sha256',
$sign,
$this->getAWSPrivateKey(),
$raw_ouput = true);
$params['Signature'] = base64_encode($hash);
return $params;
}
}

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