web网页分享微信自定义信息

前言:

开发前请确保,有一个公众号,并且该公众号拥有分享权限(可在公众号=》开发=》接口权限中查看你的公众号拥有的权限),否则在App上报permission denied错误,在开发者工具报the permission value is offline verifying错误,可结合参考微信JS-SDK说明文档,其中有些东西写的比较low,可自己进行改进。

操作:

效果对比

image-20200415151424476

绑定域名

先登录微信公众平台进入设置=》公众号设置=》功能设置填写“JS接口安全域名”。

image-20200415145821006

js代码

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<!-- 分享至微信 -->
// 引入js文件
<script src="https://res.wx.qq.com/open/js/jweixin-1.6.0.js"></script>
<script>
// 获取当前页面的url
var url = window.location.href;
//当cookie不存在的时候设置cookie
if(getCookie('isreload') == null){setCookie('isreload','1');}
//设置cookie
function setCookie(name,value)
{
var Days = 30;
var exp = new Date();
exp.setTime(exp.getTime() + Days*24*60*60*1000);
document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}
//获取cookie
function getCookie(name)
{
var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
if(arr=document.cookie.match(reg))
return unescape(arr[2]);
else
return null;
}
//通过ajax获取必要参数
$.ajax({
type : "get",
url : "https://*******.com/jssdk.php?url="+url, //这里的url换成自己的url
dataType : "jsonp",
jsonp: "callback",
jsonpCallback:"success_jsonpCallback",
success : function(data){
wx.config({
debug: false, // 开启调试模式
appId: data.appId, // 必填,公众号的唯一标识
timestamp: data.timestamp, // 必填,生成签名的时间戳
nonceStr: data.nonceStr, // 必填,生成签名的随机串
signature: data.signature,// 必填,签名
jsApiList: [ // 必填,需要使用的JS接口列表
"updateAppMessageShareData",
"updateTimelineShareData"
]
});
},
error:function(data){
if(getCookie('isreload')<3){
location.reload(); //如果加载失败刷新页面重新加载,最多刷新两次
}
var i = getCookie('isreload');
setCookie('isreload',++i);
}
});

wx.ready(function () { //需在用户可能点击分享按钮前就先调用
wx.updateAppMessageShareData({
title: document.title, // 分享标题
desc: '', // 分享描述
link: url, // 分享链接,该链接域名或路径必须与当前页面对应的公众号JS安全域名一致
imgUrl: 'imgsrc', // 分享图标
success: function () {
// 设置成功
}
});
wx.updateTimelineShareData({
title: document.title, // 分享标题
link: url, // 分享链接,该链接域名或路径必须与当前页面对应的公众号JS安全域名一致
imgUrl: 'imgsrc', // 分享图标
success: function () {
// 设置成功
}
})
});
wx.error(function (res) {
//alert(res.errMsg);//错误提示
});
</script>

php代码

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<?php
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();
$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
$data = json_decode($this->get_php_file("jsapi_ticket.php"));
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;
$this->set_php_file("jsapi_ticket.php", json_encode($data));
}
} 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
$data = json_decode($this->get_php_file("access_token.php"));
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;
$this->set_php_file("access_token.php", json_encode($data));
}
} else {
$access_token = $data->access_token;
}
return $access_token;
}

private function httpGet($url) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_TIMEOUT, 500);
// 为保证第三方服务器与微信服务器之间数据传输的安全性,所有微信接口采用https方式调用,必须使用下面2行代码打开ssl安全校验。
// 如果在部署过程中代码在此处验证失败,请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件。
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, true);
curl_setopt($curl, CURLOPT_URL, $url);

$res = curl_exec($curl);
curl_close($curl);

return $res;
}
private function get_php_file($filename) {
return trim(substr(file_get_contents($filename), 15));
}
private function set_php_file($filename, $content) {
$fp = fopen($filename, "w");
fwrite($fp, "<?php exit();?>" . $content);
fclose($fp);
}
}

$url = $_GET['url'];
//yourappId和appSecret换成自己的,可在公众号=》基本配置中查找
$jssdk = new JSSDK('yourappId','appSecret',$url);
$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;