微信分享缩略图和简介修改
2017-08-17 本文已影响27人
3f9db0513314
发现网上好多教程都是不行的，我钻研了一晚上，终于搞定。官方都没有那么详细，所以我就分享一下，微信静态页面的分享，转发。
首先我们先上效果图，本次效果是这样的
微信分享
一般我们的网站转发是这样的
Paste_Image.png
废话不说，开始演示：
（1）要和微信公众号关联
步骤一：绑定域名
先登录微信公众平台进入“公众号设置”的“功能设置”里填写“JS接口安全域名”。
备注：登录后可在“开发者中心”查看对应的接口权限。
Paste_Image.png
Paste_Image.png
步骤二：引入JS文件
在需要调用JS接口的页面引入如下JS文件，（支持https）：http://res.wx.qq.com/open/js/jweixin-1.2.0.js
ps：这里有官方的示例代码（http://demo.open.weixin.qq.com/jssdk/sample.zip）。可以看看，有java，php，python，node各种版本，为什么需要这些呢，因为你需要动态获取这些参数
Paste_Image.png
这些就在后台生成。
本次我就以php作为后台，ps：本人java，不会php，我知道用java搭后台比较麻烦，所以用php比较快捷
在文件目录写一个"jssdk.php"文件，需要改2个位置AppID和AppSecret
<?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=$nonceStr×tamp=$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;
}
}
$jssdk = new JSSDK("公众号AppID", "公众号AppSecret",$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;
?>
在"html"就如下:
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<meta name="viewport" content="width=640, target-densitydpi=device-dpi, user-scalable=no">
<meta name="keywords" content="测试">
<script src="jquery.min.js"></script>
<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://xxxxxx/jssdk.php?url=" + url,
//替换网址，xxxxx根据自己jssdk.php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: '老王标题',
desc: '老王不想写简介',
//这里请特别注意是要去除html
link: 'http://wwl0660.club',
imgUrl: 'wwl0660.club/logo.jpg'
};
wx.onMenuShareAppMessage(shareData);
wx.onMenuShareTimeline(shareData);
wx.onMenuShareQQ(shareData);
wx.onMenuShareWeibo(shareData);
});
</script>
<title>老王的测试</title>
</head>
<body>
<h1>123微信测试</h1>
</body>
</html>
当然运行php要有php的服务器，我用的就是“phpstudy”，简单，作为程序员，自己去摸索，简单
