详解html静态页面实现微信分享思路的示例代码分析

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。
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=location.href;
  $.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({
　　　　 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: '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 = $_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。

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