<?php
/**
* 官方文档：http://mp.weixin.qq.com/wiki/7/aaa137b55fb2e0456bf8dd9148dd613f.html
* 官方示例：http://demo.open.weixin.qq.com/jssdk/sample.zip
*
* 微信JSSDK类,主要修改了保存会话信息机制，示例中使用的是文件，这里使用了ThinkPHP的缓存机制，参考官方提供的示例文档
* 新增了调试模式,调用示例如下：
* $jssdk = new JSSDK(C('WX_APPID'), C('WX_SECRET'));
* $jssdk->debug = true; //启用本地调试模式,将官方的两个json文件放到入口文件index.php同级目录即可!
* $signPackage = $jssdk->GetSignPackage();
* @命名空间版本
* @author 阿甘 (QQ:33808 624)
* @date 2015-1-10 14:10
*/
namespace Com;
class JsSdk {
private $appId;
private $appSecret;
public $debug = false;
public function __construct($appId, $appSecret) {
$this->appId = $appId;
$this->appSecret = $appSecret;
}
public function getSignPackage() {
$jsapiTicket = $this->getJsApiTicket();
$url = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
$timestamp = time();
$nonceStr = $this->createNonceStr();
// 这里参数的顺序要按照 key 值 ASCII 码升序排序
$string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr×tamp=$timestamp&url=$url";
$signature = sha1($string);
$signPackage = array(
"appId" => $this->appId,
"nonceStr" => $nonceStr,
"timestamp" => $timestamp,
"url" => $url,
"signature" => $signature,
"rawString" => $string
);
return $signPackage;
}
private function createNonceStr($length = 16) {
$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$str = "";
for ($i = 0; $i < $length; $i++) {
$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
}
return $str;
}
private function getJsApiTicket() {
//debug模式
if ($this->debug) {
// jsapi_ticket 应该全局存储与更新，以下代码以写入到文件中做示例
$data = json_decode(file_get_contents("jsapi_ticket.json"));
} else {
//从cache中读取，基于ThinkPHP的缓存机制
$data = (object)(S('jsapi_ticket_json'));
}
if ($data->expire_time < time()) {
$accessToken = $this->getAccessToken();
$url = "http://api.weixin.qq.com/cgi-bin/ticket/getticket?type=1&access_token=$accessToken";
$res = json_decode($this->httpGet($url));
$ticket = $res->ticket;
if ($ticket) {
$data->expire_time = time() + 7200;
$data->jsapi_ticket = $ticket;
//debug模式
if ($this->debug) {
$fp = fopen("jsapi_ticket.json", "w");
fwrite($fp, json_encode($data));
fclose($fp);
} else {
//将对象以数组的形式进行缓存
S('jsapi_ticket_json', (array)$data);
}
}
} else {
$ticket = $data->jsapi_ticket;
}
return $ticket;
}
private function getAccessToken() {
//debug模式
if ($this->debug) {
// access_token 应该全局存储与更新，以下代码以写入到文件中做示例
$data = json_decode(file_get_contents("access_token.json"));
dump($data);
die();
} else {
//从缓存中读取数组并转成对象
$data = (Object)(S('access_token.json'));
}
if ($data->expire_time < time()) {
$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
$res = json_decode($this->httpGet($url));
$access_token = $res->access_token;
if ($access_token) {
$data->expire_time = time() + 7000;
$data->access_token = $access_token;
//debug模式
if ($this->debug) {
$fp = fopen("access_token.json", "w");
fwrite($fp, json_encode($data));
fclose($fp);
} else {
//缓存数组
S('access_token.json', (array)$data);
}
}
} else {
$access_token = $data->access_token;
}
return $access_token;
}
private function httpGet($url) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_TIMEOUT, 500);
curl_setopt($curl, CURLOPT_URL, $url);
$res = curl_exec($curl);
//错误检测
$error = curl_error($curl);
curl_close($curl);
//发生错误，抛出异常
if($error) throw new \Exception('请求发生错误(表检查是否在授权域名下访问)：' . $error);
return $res;
}
}
Com.rar
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