Question

json响应位于

{"userName":"clevermeal835","userRole":"Participant"}

我收到警报信息成功，但在阅读回复时我收到错误

XMLHttpRequest无法加载url Access-Control-Allow-Origin不允许使用Origin null。

如果我通过--disable-web-security从命令提示符运行代码，我会收到回复以下是代码。

<html>  
<head>  
<meta charset="UTF-8">  
<script type="text/javascript" src="Scripts/jquery-1.4.2.min.js"></script>  
                     <script>  
        $(document).ready(  
        function() {  
        $("#jsonpbtn2").click(function() {  
            var uid = "clevermeal835";  
            var pwd = "Welcome_1";  
            var userType = "participant";  
            var surl="http://localhost:8080/RESTlet_WS/MobiSignIn/{\"userName\":\""+uid+"\",\"password\":\""+pwd+"\",\"userType\":\""+userType+"\"}/";  
                $.ajax({  
                    type : 'GET',  
                    contentType: "application/json; charset=utf-8",  
                    url : surl,  
                    dataType : 'json',  
                    headers : {Accept : "application/json","Access-Control-Allow-Origin" : "*"},  
                    crossDomain : true,  
                    success :SucceedFunc ,
                    error : function(data, textStatus, errorThrown) {
                            console.log("error"+' '+JSON.stringify(data) + ' ' + textStatus + '  ' + errorThrown);  
                    }
                    });  
                    function SucceedFunc(data) {
                        alert("success");
                        var userName = data.userName;
                        alert(userName);
                    }
                    });  
                });  
    </script>   
    </head>  
    <body>  
    <input id="jsonpbtn2" type="submit" value="button" />  
    </body>  
    </html>

Answer 1

如果你正在打电话，上面问题中的html页面ajaxCallPage.html，例如file://.../ajaxCallPage.html那么你做错了。

将ajaxCallPage.html文件放入您的网络服务器，并将其称为http:/localhost:8080/.../ajaxCallPage.html。那么这个错误就不会出现了。

如果是这样，这个问题可能与XMLHttpRequest cannot load http://localhost:8080/exist/rest/db/.... Origin null is not allowed by Access-Control-Allow-Origin

重复

XMLHttpRequest无法加载url Access-Control-Allow-Origin不允许使用Origin null

1 个答案: