html静态页面实现微信分享思路

原文

微信分享网页的时候,希望分享出来的链接是标题+描述+缩略图,微信开发代码示例里已提供了方法,但只适用于动态页面。由于dedecms是生成了静态文件,其实我想使用ajax获取jssdk参数也能也能实现微信分享功能了,在这里分享给大家。

jssdk的步骤业务流程是这样滴:

1:在微信公众号后台配置js 安全域名,即需要引入jssdk的页面域名。 需要在域名根目录下放置微信的检测文件。

2:配置出ip白名单(可参考:http://www.idcxx.com/wx-125-1-1.html)

3:后台开发人员生成签名传递给前台

4:前端页面引入script方式 jssdk文件

5:通过ajax获取config 配置,完成config 配置后即可使用jssdk的各项功能了。

再补充啰嗦一句:

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,后台decodeURIComponent解码),
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。

前台HTML代码示例:

    <script src="http://外部站点引入/js/jquery-1.11.1.min.js"></script>  

    <script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
    <script>
    var url=encodeURIComponent(window.location.href.split('#')[0]);//分享成功之后再次分享,微信会再url附带额外参数造成二次分享签名错误,这里处理下避免config:invalid signature签名失效
      $.ajax({
        type : "get",
        url : "http://xxx/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: true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来,若要查看传入的参数,可以在pc端打开,参数信息会通过log打出,仅在pc端时才会打印
         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(JSON.stringify(data));
              //alert("连接失败!");
         }
    });
      wx.ready(function (){
      var shareData = {
      title: '标题',
      desc: '简介',//这里请特别注意是要去除html
      link: '链接',
      imgUrl: '标题图'
      };
      wx.onMenuShareAppMessage(shareData);
      wx.onMenuShareTimeline(shareData);
      wx.onMenuShareQQ(shareData);
      wx.onMenuShareWeibo(shareData);
        });
    </script>

修改服务端文件jssdk.php

    <?php
    $url = urldecode($_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";
        $signature = sha1($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;
      }
    }
     
    $jssdk = new JSSDK("公众号ID", "公众号密钥",$url);//按照自己的公众号填写
    $signPackage = $jssdk->GetSignPackage();
    $tmp=json_encode(array ('appId'=>$signPackage["appId"],'timestamp'=>$signPackage["timestamp"],'nonceStr'=>$signPackage["nonceStr"],'signature'=>$signPackage["signature"],'url'=>$signPackage["url"]));
    $callback = $_GET['callback'];
    echo $callback.'('.$tmp.')';
    exit;
    ?>

其它的按照动态页面参数设置即可。

posted @ 2020-07-07 16:35  HaimaBlog  阅读(2683)  评论(0编辑  收藏  举报