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。
前台html代码示例：
修改服务端文件jssdk.php
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。
