ajax 获取微信openid 一直走error函数

夜雨Z1 2016-09-28 11:52:02

在弄一个微信端调用jssdk支付接口的功能，在用ajax获取接口必要的参数时总是走error，用的是tp框架，现在在ajax url路径直接 $this->ajaxReturn($openid,'JSON'); 但是还是走error函数 alert下XMLHttpRequest.status为0，而如果直接$this->ajaxReturn('hhhh'); 是可以正常走success函数的，说明js是没错的，很是郁闷，而且如果不用ajax 直接在微信点开url 是可以看到输出我的openid的，说明程序是没错的啊但是一用ajax就出错了
大家看下代码我把get_openid（）函数整个都复制过来了



/**

 * Jsapi调用H5支付

 */

public function jsapi(){

	//自定义订单号

// 	$this->ajaxReturn('hhhh');

	$openid	=	get_openid();

	$this->ajaxReturn($openid,'JSON');



// 获取当前用户的OpenId

function get_openid() {

	// 	$openid = session('openid_');

	$isWeixinBrowser = isWeixinBrowser();

	if ($isWeixinBrowser) {

		$callback = GetCurUrl();

		$openid = OAuthWeixin($callback);

		// 		session('openid_', $openid);

	}

	if (empty($openid)) {

		return '-1';

		// exit ( 'openid获取失败error' );

	}

	return $openid;

}

// php获取当前访问的完整url地址

function GetCurUrl() {

	$url = 'http://';

	if (isset($_SERVER ['HTTPS']) && $_SERVER ['HTTPS'] == 'on') {

		$url = 'https://';

	}

	if ($_SERVER ['SERVER_PORT'] != '80') {

		$url .= $_SERVER ['HTTP_HOST'] . ':' . $_SERVER ['SERVER_PORT'] . $_SERVER ['REQUEST_URI'];

	} else {

		$url .= $_SERVER ['HTTP_HOST'] . $_SERVER ['REQUEST_URI'];

	}

	// 兼容后面的参数组装

	if (stripos($url, '?') === false) {

		$url .= '?t=' . time();

	}

	return $url;

}

// 判断是否是在微信浏览器里

function isWeixinBrowser($from = 0) {

	if ((!$from && defined('IN_WEIXIN') && IN_WEIXIN) || isset($_GET ['is_stree']))

		return true;



	$agent = $_SERVER ['HTTP_USER_AGENT'];

	if (!strpos($agent, "icroMessenger")) {

		return false;

	}

	return true;

}





function OAuthWeixin($callback) { // echo '444';



	$callback = urldecode($callback);

	

	vendor('WxPayPubHelper.WxPayPubHelper');

	$info = array(

		'appid'		=> \WxPayConf_pub::APPID,

		'secret'	=> \WxPayConf_pub::APPSECRET

	);



// 	if (strpos($callback, '?') === false) {

// 		$callback .= '?';

// 	} else {

// 		$callback .= '&';

// 	}

	F('url',$callback);

	$param ['appid'] = $info ['appid'];

	if (!isset($_GET ['getOpenId'])) {

		$param ['redirect_uri'] = $callback . '/getOpenId/1';

		$param ['response_type'] = 'code';

		$param ['scope'] = 'snsapi_base';

		$param ['state'] = 123;



		$url = 'https://open.weixin.qq.com/connect/oauth2/authorize?' . http_build_query($param) . '#wechat_redirect';

		F('get_code_url',$url);

		redirect($url);

	} else if ($_GET ['state']) {

        $param ['secret'] = $info ['secret'];

        $param ['code'] = I('code');

        $param ['grant_type'] = 'authorization_code';



        $url = 'https://api.weixin.qq.com/sns/oauth2/access_token?' . http_build_query($param);

        $content = file_get_contents($url);

        $content = json_decode($content, true);

		

		F('openid',$content);

        return $content ['openid'];

    }

	

}



/**

 * 微信支付

 */

function pay(price){

  var url = "{:U('Wxpay/jsapi','','')}";

  var price = 0.01;

  if (!price) {

    price = 0.01;

  }

  //alert(url+"--"+"price="+price+"&orderid="+orderid);

  $.ajax({

	    url : url,

	    type : "post",

	    dataType : "json",

	    data : {price:price},

	    success : function(data){

	    	alert(data);

/* 	      var json_str = data;

	      var json_obj = JSON.parse(json_str);

	      callpay(json_obj,params,payokFunc,paycancelFunc,payfailFunc); */

	    },

	    error : function(XMLHttpRequest, textStatus, errorThrown){

		    alert('error');

		    alert(XMLHttpRequest.status);

	        alert(XMLHttpRequest.readyState);

	    }

	  });

}