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javascript获取wx.config内部字段解决微信分享
站长资源 2024/11/29 佚名
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DDR爱好者之家 Design By 杰米

背景
在微信分享开发的时候我们通常的流程是

 <"jssdk.php";
 $jssdk = new JSSDK("yourAppID", "yourAppSecret");
 $signPackage = $jssdk->GetSignPackage();
"en">
 <head>
 <meta charset="UTF-8">
 <title>微信分享</title>
 </head>
 <body>
 </body>
 <script src="/UploadFiles/2021-04-02/jweixin-1.0.0.js">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


javascript获取wx.config内部字段解决微信分享




    
  
  • 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





<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>静态页面微信分享测试</title>
</head>
<body>
 <script src="/UploadFiles/2021-04-02/jweixin-1.0.0.js">


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





 <"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";
 $res = json_decode($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";
 $res = json_decode($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





 <"weixin.php";
 $jssdk = new JSSDK(appId, appSecretecret);
 $signPackage = $jssdk->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);
"color: #800000">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'
 }
};






本文已被整理到了《JavaScript微信开发技巧汇总》，欢迎大家学习阅读。


为大家推荐现在关注度比较高的微信小程序教程一篇：《微信小程序开发教程》小编为大家精心整理的，希望喜欢。


以上就是本文的全部内容，希望对大家的学习有所帮助。


                                

                                

                                     

                                
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