背景

在微信分享开发的时候我们通常的流程是

    GetSignPackage();?>                    
                                    

上面是一个php文件，这样的代码的一个很大缺点是前后端未分离耦合度太高，再一就是混合写不是很美观，所以我们要让PHP和HTML分离，要实现分享功能，首先就是要调用用微信的jssdk Api获取到配置参数， 这个必须是要通过php后台语言来获取的，然后将这些参数配置于wx.config中，在wx.config之前要先引入http://res.wx.qq.com/open/js/jweixin-1.0.0.js 然后就可以写分享的函数了，他们的依赖关系是wx.config 需要js库和config内部的参数，分享依赖wx.config

所以最重要的就把php的配置参数分离出来单独获取即可

解决方案

将获取配置参数的PHP写作为接口，在js里使用ajax调用，获取参数并转换为对象，再通过回调函数将ajax获取的参数塞到wx.config中

代码结构及功能

---

• index.html 页面入口
• weixin.php 服务器端获取配置参数
• configdata.php将配置转为借口输出
• getconfig.js 用ajax获取configdata.php的数据
• share.js 分享回调函
• webpack.config.js webpack配置文件
• index.js 打包后最终html调用js文件

---

index.html html静态文件

configdata.php 后台获取配置的参数 注意url要写上自己被分享的页面url不然会报invalid signature错误

    appId = $appId;    $this->appSecret = $appSecret;  }  public function getSignPackage() {    $jsapiTicket = $this->getJsApiTicket();    $url = "http://$_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    $data = json_decode(file_get_contents("jsapi_ticket.json"));    if ($data->expire_time < time()) {      $accessToken = $this->getAccessToken();      $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$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()) {      $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$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_URL, $url);    $res = curl_exec($curl);    curl_close($curl);    return $res;  }}

weixin.php 将配置参数格式化输出

    GetSignPackage();      class Config{          var $appId;          var $timestamp;          var $nonceStr;          var $signature;          var $url;    }            $config = new Config();            $config -> appId = $signPackage["appId"];      $config -> timestamp = $signPackage["timestamp"];      $config -> nonceStr = $signPackage["nonceStr"];      $config -> signature = $signPackage["signature"];    $config -> url = $signPackage["url"];           echo json_encode($config);?>

getconfig.js 使用ajax获取接口数据（配置参数）

var getConfig = function(callback) {    $.ajax({        url: "http://www.goxueche.com/api/configdata.php",        type: "get",        success: function(data) {            callback(data);        }    })}module.exports = getConfig;

share.js 分享函数

var getWeixincofig = require("./getconfig.js");getWeixincofig(shareweixin);function shareweixin(data) {  var data = JSON.parse(data);  console.log(data);  window.wx.config({    debug:true,    appId: data.appId,    timestamp: data.timestamp,    nonceStr: data.nonceStr,    signature: data.signature,    jsApiList: ['checkJsApi', 'onMenuShareTimeline', 'onMenuShareAppMessage']  });  wxShare();}function wxShare() {  //检测api是否生效  wx.ready(function() {    wx.checkJsApi({      jsApiList: [        'getNetworkType',        'previewImage'      ],      success: function(res) {        console.log(JSON.stringify(res));      }    });    //分享给好友    wx.onMenuShareAppMessage({      title: '趣学车-有温度的互联网驾校',      desc: '想去学车，就趣学车!',      link: 'http://www.goxueche.com',      imgUrl: 'http://www.goxueche.com/....png'    });        //分享到朋友圈    wx.onMenuShareTimeline({      title: '趣学车-有温度的互联网驾校',      desc: '想去学车，就趣学车!',      link: 'http://www.goxueche.com',      imgUrl: 'http://www.goxueche.com/....png'    });  });}

webpack.config.js

var webpack = require('webpack'); module.exports = {       entry: {        index: './share.js',    },    output: {        path: './',        filename: '[name].js'    }};

webpack打包

查看分享效果

参考文档