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dedecms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。
前台HTML代码示例:
<script src="http://外部站点引入/js/jquery-1.11.1.min.js"></script>
<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<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({
debug: true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来,若要查看传入的参数,可以在pc端打开,参数信息会通过log打出,仅在pc端时才会打印
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(JSON.stringify(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>
修改服务端文件jssdk.php
<?php
$url = urldecode($_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;
?>
其它的按照动态页面参数设置即可。