静态页实现微信页面的分享

来源：互联网发布：淘宝代购是真货么编辑：程序博客网时间：2024/06/05 15:23

网上看了许多静态页面分享，大多数都有很大的问题，那就是签名不正确 invalid signature，总结了一下，基本问题都是PHP里的string里面不对，string要这么写

$string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";

还有script获取的地址一定是要转码过的，不带#的，下面这段话是微信官方给的

确保你获取用来签名的url是动态获取的，动态页面可参见实例代码中php的实现方式。如果是html的静态页面在前端通过ajax将url传到后台签名，前端需要用js获取当前页面除去'#'hash部分的链接（可用location.href.split('#')[0]获取,而且需要encodeURIComponent），因为页面一旦分享，微信客户端会在你的链接末尾加入其它参数，如果不是动态获取当前链接，将导致分享后的页面签名失败。

下面是PHP代码：（更改倒数第六行的两个参数，APPID和APPSECRET）

<?php  $url = $_GET['url'];  class JSSDK {    private $appId;    private $appSecret;    private $url;    public function __construct($appId, $appSecret,$url) {      $this->appId = $appId;      $this->appSecret = $appSecret;  $this->url = $url;    }        public function getSignPackage() {      $jsapiTicket = $this->getJsApiTicket();      $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";     // $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";  $url =$this->url;      $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";  //这里经常出问题,一般都是这里出现问题，要留意        $signature = sha1($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      $data = json_decode(file_get_contents("jsapi_ticket.json"));      if ($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;          $fp = fopen("jsapi_ticket.json", "w");          fwrite($fp, json_encode($data));          fclose($fp);        }      } 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      $data = json_decode(file_get_contents("access_token.json"));      if ($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;          $fp = fopen("access_token.json", "w");          fwrite($fp, json_encode($data));          fclose($fp);        }      } 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_SSL_VERIFYPEER, false);      curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);      curl_setopt($curl, CURLOPT_URL, $url);      $res = curl_exec($curl);      curl_close($curl);      return $res;    }  }    $jssdk = new JSSDK("APPID", "APPSECRET",$url);//按照自己的公众号填写  $signPackage = $jssdk->GetSignPackage();  // var_dump($signPackage);$tmp=json_encode(array ('appId'=>$signPackage["appId"],'timestamp'=>$signPackage["timestamp"],'nonceStr'=>$signPackage["nonceStr"],'signature'=>$signPackage["signature"],'url'=>$signPackage["url"]));  $callback = $_GET['callback'];  echo $callback.'('.$tmp.')';  exit;  ?>

然后是JS代码：

<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>  <script>  url = location.href.split('#')[0];url = encodeURIComponent(url);    $.ajax({      type : "get",      url : "http://xxxxx.com/jssdk.php?url="+url,//替换网址，xxx根据自己jssdk文件位置修改      dataType : "jsonp",      jsonp: "callback",      jsonpCallback:"success_jsonpCallback",      success : function(data){          wx.config({         debug:false, appId: data.appId,  timestamp: data.timestamp,  nonceStr: data.nonceStr,  signature: data.signature,  jsApiList: [         "onMenuShareTimeline", //分享给好友         "onMenuShareAppMessage", //分享到朋友圈         "onMenuShareQQ",  //分享到QQ         "onMenuShareWeibo" //分享到微博  ]  });  },                  error:function(data){                      alert("连接失败！");                  }  });    wx.ready(function (){    var shareData = {    title: '更换标题',    desc: '更换内容',//这里请特别注意是要去除html    link: '更换链接',    imgUrl: '更换图片'    };    wx.onMenuShareAppMessage(shareData);    wx.onMenuShareTimeline(shareData);    wx.onMenuShareQQ(shareData);    wx.onMenuShareWeibo(shareData);      });  </script> </html>

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