/**
* JS-SDK 获取JS-SDK配置需要的信息
*
* @param string $url 可选:调取JS-SDK的页面url,默认为HTTP_REFERER
* @param string $type 可选:返回配置信息的格式 json & jsonp, 默认为对象数组
* @param string $$jsonp_callback 可选:使用json的callback名称
*
* @return mixed
*
* Examples:
* ```
* $api->get_jsapi_config();
* $api->get_jsapi_config('http://www.baidu.com/');
* ```
* Result:
* ```
* {
* errcode: 0,
* appId: "wx733d7f24bd29224a",
* timestamp: 1440073485,
* nonceStr: "5Ars5fLaLuPEXSgm",
* signature: "7f830aff99ff11fa931cae61b5b932b1f2c8ee10",
* url: "http://www.baidu.com/"
* }
* ```
*
* Examples:
* ```
* $api->get_jsapi_config('', 'json');
* ```
* Result:
* ```
* {"errcode":0,"appId":"wx733d7f24bd29224a","timestamp":1440073708,"nonceStr":"caFkkXnOhVrcq3Ke","signature":"1c6c08ddf6e0e3c0fd33aafcb160a9f67d6b8f94","url":null}
* ```
*
* Examples:
* ```
* $api->get_jsapi_config('', 'jsonp');
* $api->get_jsapi_config('', 'jsonp', 'callback');
* ```
* Result:
* ```
* ;jQuery17105012127514928579_1440073858610({"errcode":0,"appId":"wx733d7f24bd29224a","timestamp":1440073875,"nonceStr":"vsGBSM0MMiWeIJFQ","signature":"616005786e404fe0da226a6decc2730624bedbfc","url":null})
* ```
*/
public function get_jsapi_config($url = '', $type = '', $jsonp_callback = 'callback')
{
$jsapi_ticket = $this->get_jsapi_ticket();
$nonce_str = SHA1::get_random_str();
$timestamp = time();
if ($url == '') {
$url = $_SERVER['HTTP_REFERER'];
}
$signature = SHA1::get_jsapi_signature($jsapi_ticket, $nonce_str, $timestamp, $url);
if ($signature === false) {
$jsapi_config = array('errcode' => -1, 'errmsg' => 'get jsapi signature error.');
} else {
$jsapi_config = array('errcode' => 0, 'appId' => $this->appId, 'timestamp' => $timestamp, 'nonceStr' => $nonce_str, 'signature' => $signature, 'url' => $url);
}
if ($type == 'json' || $type == 'jsonp') {
$jsapi_config = json_encode($jsapi_config);
if ($type == 'jsonp' && isset($_REQUEST[$jsonp_callback]) && !empty($_REQUEST[$jsonp_callback])) {
$jsapi_config = ';' . $_REQUEST[$jsonp_callback] . '(' . $jsapi_config . ')';
}
}
return $jsapi_config;
}