首先这一定需要使用微信jssdk,但是在你使用了微信jssdk之后,依旧分享的链接不带图标和摘要,那就看看我踩的坑吧。
前端代码
我这里引入了jQuery(不用jQuery的写法的话可以不引入),然后这里就是必须引入最新的微信jssdk:https://res2.wx.qq.com/open/js/jweixin-1.6.0.js
最新的微信jssdk已经舍弃了之前的分享接口,最新的分享接口是:updateAppMessageShareData 和 updateTimelineShareData
前端代码如下:
<script src="https://res2.wx.qq.com/open/js/jweixin-1.6.0.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
var url = location.href;
$.ajax({
type: "get",
url: "https://你的网址/wxjssdk.php?url=" + url,
dataType: "json",
success: function(res) {
if (res.code === 200) {
wx.config({
debug: false,
appId: res.data.appId,
timestamp: res.data.timestamp,
nonceStr: res.data.nonceStr,
signature: res.data.signature,
jsApiList: [
'updateAppMessageShareData',
'updateTimelineShareData'
]
});
wx.ready(function() {
wx.updateAppMessageShareData({
title: res.data.title,
desc: res.data.desc,
link: res.data.link,
imgUrl: res.data.imgUrl,
success: function() {
console.log('分享成功');
}
});
wx.updateTimelineShareData({
title: res.data.title,
link: res.data.link,
imgUrl: res.data.imgUrl,
success: function() {
console.log('分享成功');
}
})
});
}
}
})
</script>
后端代码
前端需要ajax请求后端进行签名和获取token,请求的后端https://你的网址/wxjssdk.php文件代码如下:
<?php
/**
* 微信JsSDK
* Class JsSDK
*/
class JsSDK {
private $appId;
private $appSecret;
private $url;
public function __construct($appId, $appSecret, $url) {
$this->appId = $appId;
$this->appSecret = $appSecret;
$this->url = $url;
}
/**
* 签名
* @return array
*/
public function getSignPackage() {
$jsapiTicket = $this->getJsApiTicket();
$url = $this->url;
$timestamp = time();
$nonceStr = $this->createNonceStr();
$string = "jsapi_ticket=" . $jsapiTicket . "&noncestr=" . $nonceStr . "×tamp=" . $timestamp . "&url=" . $url;
$signature = sha1($string);
return [
"appId" => $this->appId,
"nonceStr" => $nonceStr,
"timestamp" => $timestamp,
"url" => $url,
"signature" => $signature,
"rawString" => $string
];
}
/**
* 创建字符串
* @param int $length
* @return string
*/
private function createNonceStr($length = 16) {
$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$str = "";
for ($i = 0; $i < $length; $i++) {
$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
}
return $str;
}
/**
* 获取JsApiTicket
* @return mixed
*/
private function getJsApiTicket() {
$data = json_decode($this->get_php_file("jsapi_ticket.php"));
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;
$this->set_php_file("jsapi_ticket.php", json_encode($data));
}
} else {
$ticket = $data->jsapi_ticket;
}
return $ticket;
}
/**
* 获取AccessToken
* @return mixed
*/
private function getAccessToken() {
$data = json_decode($this->get_php_file("access_token.php"));
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;
$this->set_php_file("access_token.php", json_encode($data));
}
} else {
$access_token = $data->access_token;
}
return $access_token;
}
/**
* GET CURL请求
* @param $url
* @return bool|string
*/
private function httpGet($url) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_TIMEOUT, 500);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, true);
curl_setopt($curl, CURLOPT_URL, $url);
$res = curl_exec($curl);
curl_close($curl);
return $res;
}
/**
* 读取文件
* @param $filename
* @return string
*/
private function get_php_file($filename) {
return trim(substr(file_get_contents($filename), 15));
}
/**
* 写入文件
* @param $filename
* @param $content
*/
private function set_php_file($filename, $content) {
$fp = fopen($filename, "w");
fwrite($fp, "<?php exit();?>" . $content);
fclose($fp);
}
}
$url = $_GET['url'];
$JsSDK = new JSSDK("替换成你的公众号appId", "替换成你的公众号appSecret", $url);
$signPackage = $JsSDK->GetSignPackage();
$result = [
'code' => 200,
'msg' => 'success',
'data' => [
'appId' => $signPackage["appId"],
'timestamp' => $signPackage["timestamp"],
'nonceStr' => $signPackage["nonceStr"],
'signature' => $signPackage["signature"],
'title' => '替换成分享的链接标题',
'desc' => '替换成分享的链接描述',
'link' => $url,
'imgUrl' => 'https://你的网址/share.png'
]
];
header('content-type:application/json');
echo json_encode($result);exit;
因为这里的 access_token 和 jsapi_ticket 都是存储在文件中,所以这里你需要创建两个文件,代码如下:
// access_token.php 文件
<?php exit();?>
{"access_token":"","expire_time":0}
// jsapi_ticket.php 文件
<?php exit();?>
{"jsapi_ticket":"","expire_time":0}
当然你也可以把 access_token 和 jsapi_ticket 存储在数据库中。
填坑
如果依然无法实现,那么注意以下几点:
- 确保服务器IP增加到了IP白名单中。
- 确保开发者ID(AppID)和开发者密码(AppSecret)正确,开发者密码(AppSecret)复制的时候可能会复制失败,需要手动复制。
- 确保分享的网页域名已经增加到JS接口安全域名。
- 由于微信内置浏览器有缓存,建议更换手机或刷新微信内浏览器缓存后再次查看效果,微信内浏览器清理缓存方法如下:在微信中打开链接debugmm.qq.com/?forcex5=true 然后关闭,再打开debugtbs.qq.com 和 debugx5.qq.com 来清理微信浏览器缓存。
- 如果实在不行建议使用 微信开发者工具 下载地址:https://developers.weixin.qq.com/miniprogram/dev/devtools/download.html 在开发者工具中调试,记着一定要开启jssdk中的debug