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微信JSSDK自定义分享缩略图与标题:PHP与JS的设置

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今天绕了好久,关于这个配置,有几个坑注意下:    微信文档说,先配置安全域名,注意域名,不是带http://的!    初始化PHP:“`  ?php  require_once “jssdk.php”;  $jssdk = new JSSDK(“appId”, “秘钥”);  $signPackage = $jssdk-GetSignPackage();  ?  “`            然后就是,引入JS-SDK“`script type=”text/javascript” src=”http://res.wx.qq.com/open/js/jweixin-1.4.0.js”/script“`开始配置JS:打开debug,可以测试API调用结果,会Alert出来。jsApiLis是需要使用的API,分享给朋友圈和好友。这里有一个经常会出错的地方:signature这里,这是由PHP生成的。wx.config({    debug:true,    appId: ‘?php echo $signPackage[“appId”];?’,    timestamp: ‘?php echo $signPackage[“timestamp”];?’,    nonceStr: ‘?php echo $signPackage[“nonceStr”];?’,    signature: ‘?php echo $signPackage[“signature”];?’,    jsApiList: [    ‘updateAppMessageShareData’,    ‘updateTimelineShareData’ ]  });  wx.ready(function () {    // 在这里调用 API    //      wx.updateAppMessageShareData({     title: ‘title!’, // 分享标题    desc: ‘desc, // 分享描述    link: ‘这里与安全域名对应,加上http’, // 分享链接,该链接域名或路径必须与当前页面对应的公众号JS安全域名一致    imgUrl: ‘xxx/mini.png’, // 分享图标    success: function () {      // 设置成功    }  });看看PHP:这是测试过得(企业号注意切换url),access_token和ticket都被持久化了,因为调用有数量限制的,还有一个注意,getTicket那里的url,type这里是jsapi!?phpclass JSSDK {  private $appId;  private $appSecret;  public function __construct($appId, $appSecret) {    $this-appId = $appId;    $this-appSecret = $appSecret;  }  public function getSignPackage() {    $jsapiTicket = $this-getJsApiTicket();    // 注意 URL 一定要动态获取,不能 hardcode.    $protocol = (!empty($_SERVER[‘HTTPS’]) && $_SERVER[‘HTTPS’] !== ‘off’ || $_SERVER[‘SERVER_PORT’] == 443) ? “https://” : “http://”;    $url = “$protocol$_SERVER[HTTP_HOST]$_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=$nonceStr&timestamp=$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() {    // 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    $data = json_decode($this-get_php_file(“jsapi_ticket.php”));    if ($data-expire_time time()) {      $accessToken = $this-getAccessToken();      // 如果是企业号用以下 URL 获取 ticket      // $url = “https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken”;      $url = “https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken”;      $res = json_decode($this-httpGet($url));      $ticket = $res-ticket;      if ($ticket) {        $data-expire_time = time() + 7000;        $data-jsapi_ticket = $ticket;        $this-set_php_file(“jsapi_ticket.php”, json_encode($data));      }    } else {      $ticket = $data-jsapi_ticket;    }    return $ticket;  }  private function getAccessToken() {    // 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    $data = json_decode($this-get_php_file(“access_token.php”));    if ($data-expire_time time()) {      // 如果是企业号用以下URL获取access_token      // $url = “https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this-appId&corpsecret=$this-appSecret”;      $url = “https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$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;        $this-set_php_file(“access_token.php”, json_encode($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($curl, CURLOPT_TIMEOUT, 500);    // 为保证第三方服务器与微信服务器之间数据传输的安全性,所有微信接口采用https方式调用,必须使用下面2行代码打开ssl安全校验。    // 如果在部署过程中代码在此处验证失败,请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件。    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);//绕过ssl验证    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);    curl_setopt($curl, CURLOPT_URL, $url);    $res = curl_exec($curl);    curl_close($curl);    return $res;  }  private function get_php_file($filename) {    return trim(substr(file_get_contents($filename), 15));  }  private function set_php_file($filename, $content) {    $fp = fopen($filename, “w”);    fwrite($fp, “?php exit();?” . $content);    fclose($fp);  }}看看效果

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