使用微信JSSDK自定义分享内容

微信在6.0.2.58版本以后开始使用新的api，在Android系统中不能用以前的代码来自定义分享内容了。

现在自定义内容的方法走的是公众号的一套流程

1获取access_token

2得到token后获取jsapi_ticket

3得到ticket后将ticket用sha1算法加密。

这里加密的数据是ticket+time()+随机字符串+url

code：

<?php
require_once "jssdk.php";
$jssdk = new JSSDK("APPID","APPSECRET");
$signPackage = $jssdk->GetSignPackage();
?>
<!DOCTYPE html>
<html lang="en">

..

<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script>
      wx.config({
    debug: true,
    appId: '<?php echo $signPackage["appId"];?>',
    timestamp: <?php echo $signPackage["timestamp"];?>,
    nonceStr: '<?php echo $signPackage["nonceStr"];?>',
    signature: '<?php echo $signPackage["signature"];?>',
    jsApiList: [
      // 所有要调用的 API 都要加到这个列表中
      'onMenuShareTimeline',
      'onMenuShareAppMessage',
      'onMenuShareQQ',
      'onMenuShareWeibo'
    ]
  });
      //自定义内容
    var dataForWeixin = {
    title: title,
    desc: desc,
    imgUrl: imgUrl,
    link: link
  };
  wx.ready(function () {
    wx.onMenuShareTimeline({
      title: dataForWeixin.title, // 分享标题
      link: dataForWeixin.link, // 分享链接
      imgUrl: dataForWeixin.imgUrl
    });
    wx.onMenuShareAppMessage({
      title: dataForWeixin.title,
      desc: dataForWeixin.desc,
      link: dataForWeixin.link,
      imgUrl: dataForWeixin.imgUrl
    });
    wx.onMenuShareQQ({
      title: dataForWeixin.title,
      desc: dataForWeixin.desc,
      link: dataForWeixin.link,
      imgUrl: dataForWeixin.imgUrl
    });
    wx.onMenuShareWeibo({
      title: dataForWeixin.title,
      desc: dataForWeixin.desc,
      link: dataForWeixin.link,
      imgUrl: dataForWeixin.imgUrl
    });
  });

</html>

　　

jssdk.php：

<?php
class JSSDK {
  private $appId;
  private $appSecret;

  public function __construct($appId, $appSecret) {
    $this->appId = $appId;
    $this->appSecret = $appSecret;
  }

  public function getSignPackage() {
    $jsapiTicket = $this->getJsApiTicket();

    // 注意 URL 一定要动态获取，不能 hardcode.
    $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
    $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

    $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
    $data = json_decode(file_get_contents("jsapi_ticket.json"));
    if ($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;
  }
}

同时为了减少服务器压力，将获取到的token和ticket保存在本地

{"access_token":"","expire_time":0}

{"jsapi_ticket":"","expire_time":0}

效果