|
微信分享网页的时候,希望分享出来的链接是标题+描述+缩略图,微信开发代码示例里已提供了方法,但只适用于动态页面。由于cms是生成了静态文件,其实我想使用ajax获取jssdk参数也能也能实现微信分享功能了,在这里分享给大家。
jssdk的步骤业务流程是这样滴:
1:在微信公众号后台配置js 安全域名,即需要引入jssdk的页面域名。 需要在域名根目录下放置微信的检测文件。
2:配置出ip白名单(可参考:http://www.idcxx.com/wx-125-1-1.html)
3:后台开发人员生成签名传递给前台
4:前端页面引入script方式 jssdk文件
5:通过ajax获取config 配置,完成config 配置后即可使用jssdk的各项功能了。
再补充啰嗦一句:
确保你获取用来签名的url是动态获取的,动态页面可参见实例代码中php的实现方式。如果是html的静态页面在前端通过ajax将url传到后台签名,前端需要用js获取当前页面除去'#'hash部分的链接(可用location.href.split('#')[0]获取,而且需要encodeURIComponent,后台decodeURIComponent解码),因为页面一旦分享,微信客户端会在你的链接末尾加入其它参数,如果不是动态获取当前链接,将导致分享后的页面签名失败。
增加:
var url=encodeURIComponent(window.location.href.split('#')[0]);//分享成功之后再次分享,微信会再url附带额外参数造成二次分享签名错误,这里处理下避免config:invalid signature签名失效
前台HTML代码示例:
- <script src="http://外部站点引入/js/jquery-1.11.1.min.js"></script>
复制代码- <script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>//旧版
- <script>
- var url=encodeURIComponent(window.location.href.split('#')[0]);//分享成功之后再次分享,微信会再url附带额外参数造成二次分享签名错误,这里处理下避免config:invalid signature签名失效
- $.ajax({
- type : "get",
- url : "http://xxx/jssdk.php?url="+url,//替换网址,xxx根据自己jssdk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: '标题',
- desc: '简介',//这里请特别注意是要去除html
- link: '链接',
- imgUrl: '标题图'
- };
- wx.onMenuShareAppMessage(shareData);
- wx.onMenuShareTimeline(shareData);
- wx.onMenuShareQQ(shareData);
- wx.onMenuShareWeibo(shareData);
- });
- </script>
复制代码 修改服务端文件jssdk.php
- <?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";
- $signature = sha1($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;
- }
- }
-
- $jssdk = new JSSDK("公众号ID", "公众号密钥",$url);//按照自己的公众号填写
- $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;
- ?>
复制代码 其它的按照动态页面参数设置即可。
注意:
传过去的url地址跟wx.ready函数中shareData里面要分享的link链接要保持一致,否则会导致签名非法等问题;
转自:https://www.cnblogs.com/phpper/p/6604903.html
https://www.bbsmax.com/A/q4zVDWo95K/
|
|