public function get_address_api() {
  $APPID=C('APPID');
  $SCRETID=C('SCRETID');
  if (!isset($_GET['code'])) {
    $backurl = $this->get_url();
    $url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=".$APPID."&redirect_uri=".urlencode($backurl)."&response_type=code&scope=jsapi_address&state=123#wechat_redirect";
    // snsapi_userinfo
    Header("Location: $url");
    exit;
  } else {
    $code = $_GET['code'];
    $url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$APPID."&secret=".$SCRETID."&code=".$code."&grant_type=authorization_code";
    $re = file_get_contents($url);
    $rearr = json_decode($re,true);
    $backurl = $this->get_url();
    $openid = $rearr['openid'];
    $unionid = $rearr['unionid'];
    $asstoken = $rearr['access_token'];
    S('jsapi_address_token'.$openid,$asstoken,7200);
    $data['appid']=$APPID;
    $data['url']=$backurl;
    $data['timestamp']=time();
    $data['timestamp']= (string)($data['timestamp']);
    $data['noncestr']=$this->getRandStr(10);
    $data['accesstoken']=$asstoken;
    foreach ($data as $k => $v) {
      $Parameters[$k] = $v;
    }
    //签名步骤一：按字典序排序参数
    ksort($Parameters);
    $String = $this->formatBizQueryParaMap($Parameters, false);
    $data['addrsign']=SHA1($String);
    $this->assign('data',$data);
  }
  $this->siteDisplay('address_api');
}