【荐】静态页面实现微信分享带缩略图、标题和描述

静态页面实现微信分享带缩略图、标题和描述，想法很现实，要想实现这样的功能这里就要用到大ajax技术，在这里361源码分享给大家。

服务端文件jssdk.php代码：

<?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;?>

静态页面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>

配置好jssdk.php文件后，只需要把js代码加入到静态页面模版中即可。

还有一个地方需要注意的是还有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。

上述功能文件打包懒人下载：

链接: https://pan.baidu.com/s/1aE-9h10EOgnC3yhwV5RXRQ   密码: j27m