使用jQuery的CORS请求-$ .ajax() [英] CORS request using jQuery - $.ajax()

问题描述

我正在开发一个Web应用程序，其中数据来自不同的域.我的意思是，在我的应用程序中，几乎90％的请求都是跨域请求.

I am developing a web application where data is coming from different domain. I mean in my application almost 90% request are cross domain request.

在IIS上部署此应用程序时，我无法获取数据.

I am unable to get the data while deploy this application on IIS.

服务器部署在 http://some.ip.add/crmservice 上 客户端部署在 http://diffent.ip.add/saascrm

Server is deployed on http://some.ip.add/crmservice client is deployed on http://diffent.ip.add/saascrm

我正在使用jQuery 2.0以$ .ajax();异步方式获取数据.

I am using jQuery 2.0 to get the data in async manner using $.ajax();

注意:数据以xml格式显示

还向web.config文件中添加了一些内容.

Added some stuff to web.config file also.

<system.webServer>
    <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*" />
      </customHeaders>
    </httpProtocol>
</system.webServer>

这是我的摘录.

$.support.cors = true;
      $.ajax({
                        type: "GET",
                        url: 'http://some.ip.add/crmservice/crmservice.asmx/HandShake', 
                        contentType: "application/json; charset=utf-8",
                        dataType: "json",
                        crossDomain: true,
                        beforeSend: function (request) {
                        //    debugger;
                            request.setRequestHeader("Access-Control-Allow-Origin", '*');
                        },
                        error: function (xhr, status, error) {
                            try {
                              //  debugger;
                                // debugger;
                              //Here i am getting error : Access denied in IE 9.0 and and just "error" in firefox. 
                                var msg = JSON.parse(xhr.responseText);
                                alert(msg.Message);
                            }
                            catch (e) {
                                // debugger;
                                alert(xhr.statusText);
                            }
                            return true;

                        },
                        success: function (data) {
                            debugger;
                            xmlDoc1 = $.parseXML(data.d);
                            $xml1 = $(xmlDoc1);
                            if ($xml1.find('Result').text() == '0') {
                                $(this).MessageBox('success', $xml1.find('Message').text());
                                $("#uxDBName").prop("disabled", false);
                                $("#uxSUPassword").prop("disabled", false);
                                $("#uxServiceURL").prop("disabled", true);
                                GetListOfB1Databases(url);
                            }
                        }
                    });

我的服务器代码是:

Global.asax

Global.asax

protected void Application_BeginRequest(object sender, EventArgs e)
    {
        HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
        HttpContext.Current.Response.Cache.SetNoStore();
        EnableCrossDmainAjaxCall();  
    }
    private void EnableCrossDmainAjaxCall()
    {
        HttpContext.Current.Response.AppendHeader("Access-Control-Allow-Origin", "*");

        if (HttpContext.Current.Request.HttpMethod == "OPTIONS")
        {
            HttpContext.Current.Response.AppendHeader("Access-Control-Allow-Methods", "GET, POST");
            HttpContext.Current.Response.AppendHeader("Access-Control-Allow-Headers","Content-Type, Accept");
            HttpContext.Current.Response.AppendHeader("Access-Control-Allow-Origin", "*");
            HttpContext.Current.Response.AppendHeader("Access-Control-Max-Age", "1728000");
            HttpContext.Current.Response.End();
        }
    }

     //Web method
     [ScriptMethod(ResponseFormat = ResponseFormat.Json), WebMethod(EnableSession = true)]
    public string HandShake()
    {
        return General.Response("0", "Tenant is in reachable. Please specify SAP Business One Company database\r\nand 'manager' Password", "");
    }

我在

I found some solutions on this also, I found that CORS is not supported by IE 8 & 9. IE 8 * 9 does not create the instance of XMLHttpRequest object. It create XDomainRequest, so need to check for the user agent. I found an alternate solution here

现在我的问题是，我几乎到处都有将$ .ajax()方法用于跨域调用.我不想在我的框架中进行重大更改.

Now my problem is I have use $.ajax() method everywhere almost 90% call is cross domain call. I don't want to make this major change in my framework.

使用$ .ajax()对此有解决方案吗?

Is there any solution to this using $.ajax()?

请帮助我，自一个星期以来，我一直处于严重困境.

Please help me, I am badly stuck since a week.

谢谢.

推荐答案

感谢您的所有合作和帮助. 我找到了解决方法.

Thanks for all of your cooperation and help that you provide me. I found solution.

 var url = $("#uxServiceURL").val();
        $.ajax({
            crossOrigin: true,
            url: url + '/HandShake',
            error: function (xhr, status, error) {
                try {
                    alert('Error');
                }
                catch (e) {
                    alert(xhr.statusText);
                }
                return true;
            },
            success: function (data) {
                var d1 = data.replace(/\&lt;/g, '<').replace(/\&gt;/g, '>')
                xmlDoc1 = $.parseXML(d1);

                $xml1 = $(xmlDoc1);
                if ($xml1.find('Result').text() == '0') {
                    $(this).MessageBox('success', $xml1.find('Message').text());
                   
                }
            }
        }); 

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