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<?php
class SaeTaskQueuePublic
{
private $_appname = "";
private $_accesskey = "";
private $_secretkey = "";
private $_appversion = false;
private $_errno = 0;
private $_errmsg = "OK";
private $_post = array();
private $_queue_name = '';
private $_act = '';
private $_backend_url = 'http://g.sinacloud.com';
const post_limitsize = 8388608;
function __construct($queue_name)
{
$this->_queue_name = $queue_name;
$this->_post['name'] = $queue_name;
$this->_post['queue'] = array();
}
function addTask($tasks, $postdata = NULL, $prior = false, $options = array())
{
if (is_string($tasks)) {
if (!$this->checkTaskUrl($tasks)) {
$this->_errno = 1;
$this->_errmsg = "Unavailable tasks";
return false;
}
$item = array();
$item['url'] = $tasks;
if ($postdata != NULL) $item['postdata'] = base64_encode($postdata);
if ($prior) $item['prior'] = true;
$this->setOptions($item, $options);
$this->_post['queue'][] = $item;
} elseif (is_array($tasks)) {
if (empty($tasks)) {
$this->_errno = 1;
$this->_errmsg = "Unavailable tasks";
return false;
}
foreach ($tasks as $k => $v) {
if (is_array($v) && isset($v['url']) && $this->checkTaskUrl($v['url'])) {
if (isset($v['postdata'])) {
$v['postdata'] = base64_encode($v['postdata']);
}
if (isset($v['options'])) {
$this->setOptions($v, $v['options']);
unset($v['options']);
}
$this->_post['queue'][] = $v;
} elseif (isset($tasks['url']) && $this->checkTaskUrl($tasks['url'])) {
if (isset($tasks['postdata'])) {
$tasks['postdata'] = base64_encode($tasks['postdata']);
}
if (isset($tasks['options'])) {
$this->setOptions($tasks, $tasks['options']);
unset($tasks['options']);
}
$this->_post['queue'][] = $tasks;
break;
} else {
$this->_post['queue'] = array();
$this->_errno = 1;
$this->_errmsg = "Unavailable tasks";
return false;
}
}
}
return true;
}
public function errno()
{
return $this->_errno;
}
public function errmsg()
{
return $this->_errmsg;
}
public function setAuth($appname, $accesskey, $secretkey, $appversion = false)
{
$this->_appname = trim($appname);
$accesskey = trim($accesskey);
$secretkey = trim($secretkey);
$this->_accesskey = $accesskey;
$this->_secretkey = $secretkey;
$this->_appversion = trim($appversion);
return true;
}
public function push()
{
$post = json_encode($this->_post);
if (strlen($post) > self::post_limitsize) {
$this->_errno = 1;
$this->_errmsg = "The post data is too large.";
return false;
}
if (count($this->_post['queue']) > 0) {
$this->_post['queue'] = array();
return $this->postData(array("taskqueue" => $post));
} else {
$this->_errno = 1;
$this->_errmsg = "The queue is empty.";
return false;
}
}
function leftLength()
{
$this->_act = 'leftlen';
return $this->send();
}
function curLength()
{
$this->_act = 'curlen';
return $this->send();
}
private function send()
{
$post = urlencode(json_encode($this->_post));
if ($post) {
return $this->postData(array("params" => $post, "act" => $this->_act));
} else {
return false;
}
}
private function post($uri, $post_data = array())
{
if (!$uri) {
return false;
}
return $this->_curl($uri, $post_data, 'POST');
}
private function _cal_sign_and_set_header($uri, $method = 'GET')
{
$a = array();
$a[] = $method;
$a[] = $uri;
$timeline = time();
$b = array('x-sae-accesskey' => $this->_accesskey, 'x-sae-timestamp' => $timeline);
ksort($b);
foreach ($b as $key => $value) {
$a[] = sprintf("%s:%s", $key, $value);
}
$str = implode("\n", $a);
$s = hash_hmac('sha256', $str, $this->_secretkey, true);
$b64_s = base64_encode($s);
$headers = array();
$headers[] = sprintf('x-sae-accesskey:%s', $this->_accesskey);
$headers[] = sprintf('x-sae-timestamp:%s', $timeline);
$headers[] = sprintf('Authorization: SAEV1_HMAC_SHA256 %s', $b64_s);
return $headers;
}
private function _curl($uri, $post_data = array(), $method = 'GET')
{
$ch = curl_init();
$url = sprintf('%s%s', $this->_backend_url, $uri);
curl_setopt($ch, CURLOPT_URL, $url);
$headers = $this->_cal_sign_and_set_header($uri, $method);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
if ($post_data) {
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
}
$ret = curl_exec($ch);
$error = curl_errno($ch);
$info = curl_getinfo($ch);
curl_close($ch);
if (empty($info['http_code'])) {
$this->_errno = 500;
$this->_errmsg = $error;
} else if ($info['http_code'] != 200) {
$this->_errno = 500;
$code = $info['http_code'];
$this->_errmsg = "Taskqueue service internal error, http code isn't 200, http code: $code";
} else {
if ($info['size_download'] == 0) {
$header = substr($ret, 0, $info['header_size']);
$task_header = $this->extractCustomHeader("TaskQueueError", $header);
if ($task_header == false) {
$this->_errno = 501;
$this->_errmsg = "unknown error";
} else {
$err = explode(",", $task_header, 2);
$this->_errno = trim($err[0]);
$this->_errmsg = trim($err[1]);
}
} else {
$body = substr($ret, -$info['size_download']);
$body = json_decode(trim($body), true);
$this->_errno = $body['errno'];
$this->_errmsg = $body['errmsg'];
if ($body['errno'] == 0) {
if (isset($body['data'])) {
return $body['data'];
} else {
return true;
}
}
}
}
return false;
}
private function postData($post)
{
return $this->post('/taskqueue/index.php', $post);
}
private function extractCustomHeader($key, $header)
{
$pattern = '/' . $key . ':(.*?)' . "\n/";
if (preg_match($pattern, $header, $result)) {
return $result[1];
} else {
return false;
}
}
private function setOptions(&$item, $options)
{
if (is_array($options) && !empty($options)) {
foreach ($options as $k => $v) {
switch ($k) {
case 'delay':
$item['delay'] = intval($v);
break;
default:
break;
}
}
}
}
private function checkTaskUrl(&$url)
{
if (substr($url, 0, 1) === '/') {
if ($this->_appversion) {
$url = sprintf('http://%s.%s.applinzi.com%s', $this->_appversion, $this->_appname, $url);
} else {
$url = sprintf('http://%s.applinzi.com%s', $this->_appname, $url);
}
}
$url = filter_var($url, FILTER_VALIDATE_URL);
return $url;
}
}