IE 上的 AJAX POST 请求失败并显示错误“无传输"? [英] AJAX POST request on IE fails with error "No Transport"?

问题描述

我正在尝试向公共服务发出 AJAX 请求

代码如下:

$.ajax({url : "http://api.geonames.org/citiesJSON",类型:'POST'，缓存:假，数据类型:'json'，数据 : {用户名:演示"，北:10，南:10，东:10，西:10}}).完成(功能(数据){alert("成功:" + JSON.stringify(data));}).失败(函数(a，b，c，d){alert("失败:"+ JSON.stringify(a) + " "+ JSON.stringify(b) + " "+ JSON.stringify(c) + " "+ JSON.stringify(d));});

您可以在此链接中尝试:http://jsfiddle.net/hDXq3/

在 Chrome & 上成功检索到响应Firefox，输出如下:

但是对于 IE，失败警报:
失败:{"readyState":0,"status":0,"statusText":"No Transport"} "error" "No Transport" undefined

为什么它不能在 IE 上运行?以及如何解决这个问题?

解决方案

以下是给有兴趣的人的解决方案:

if (!jQuery.support.cors && window.XDomainRequest) {var httpRegEx =/^https?:///i;var getOrPostRegEx =/^get|post$/i;var sameSchemeRegEx = new RegExp('^'+location.protocol, 'i');var xmlRegEx =///xml/i;//ajaxTransport 存在于 jQuery 1.5+jQuery.ajaxTransport('text html xml json', function(options, userOptions, jqXHR){//XDomainRequests 必须是:异步，GET 或 POST 方法，HTTP 或 HTTPS 协议，与调用页面的方案相同if (options.crossDomain && options.async && getOrPostRegEx.test(options.type) && httpRegEx.test(userOptions.url) && sameSchemeRegEx.test(userOptions.url)) {var xdr = null;var userType = (userOptions.dataType||'').toLowerCase();返回 {发送:功能(标题，完成){xdr = 新的 XDomainRequest();如果 (/^d+$/.test(userOptions.timeout)) {xdr.timeout = userOptions.timeout;}xdr.ontimeout = 函数(){完成(500，'超时')；};xdr.onload = 函数(){var allResponseHeaders = '内容长度:' + xdr.responseText.length + '
内容类型:' + xdr.contentType;变量状态 = {代码:200，消息:'成功'};变量响应 = {文本:xdr.responseText};尝试 {如果(用户类型 === 'json'){尝试 {响应.json = JSON.parse(xdr.responseText);}赶上(e){状态代码 = 500;status.message = '解析错误';//抛出'无效的JSON:' + xdr.responseText;}} else if ((userType === 'xml') || ((userType !== 'text') && xmlRegEx.test(xdr.contentType))) {var doc = new ActiveXObject('Microsoft.XMLDOM');doc.async = 假；尝试 {doc.loadXML(xdr.responseText);}赶上(e){文档 = 未定义；}if (!doc || !doc.documentElement || doc.getElementsByTagName('parsererror').length) {状态代码 = 500;status.message = '解析错误';抛出 '无效的 XML:' + xdr.responseText;}响应.xml = 文档；}} 捕捉(解析消息){抛出 parseMessage;} 最后 {完成(状态.代码，状态.消息，响应，allResponseHeaders)；}};xdr.onerror = 函数(){完成(500，'错误'，{文本:xdr.responseText});};xdr.open(options.type, options.url);//xdr.send(userOptions.data);xdr.send();},中止:函数(){如果(xdr){xdr.abort();}}};}});};jQuery.support.cors = true;$.ajax({url : "http://api.geonames.org/citiesJSON",跨域:真，类型:'POST'，缓存:假，数据类型:'json'，数据 : {用户名:演示"，北:10，南:10，东:10，西:10}}).完成(功能(数据){alert("成功:" + JSON.stringify(data));}).失败(函数(a，b，c，d){alert("失败:"+ JSON.stringify(a) + " "+ JSON.stringify(b) + " "+ JSON.stringify(c) + " "+ JSON.stringify(d));});

您可以在此链接中尝试:http://jsfiddle.net/bjW8t/4/

I'm trying to make an AJAX request to a public service

Here's the code:

$.ajax({
    url : "http://api.geonames.org/citiesJSON",
    type : 'POST',
    cache : false,
    dataType : 'json',
    data : {
        username: "demo", 
        north:10, 
        south: 10, 
        east:10, 
        west:10}
}).done(function(data) {
    alert("Success: " + JSON.stringify(data));
}).fail(function(a, b, c, d) {
    alert("Failure: " 
          + JSON.stringify(a) + " " 
          + JSON.stringify(b) + " " 
          + JSON.stringify(c) + " " 
          + JSON.stringify(d) );
});

You may try it in this link: http://jsfiddle.net/hDXq3/

The response is retrieved successfully on Chrome & Firefox, and the output is as follows:

But for IE, the fails alerting:
Failure: {"readyState":0,"status":0,"statusText":"No Transport"} "error" "No Transport" undefined

Why it's not working on IE ? and how to fix this ?

解决方案

Here's the solution for those who are interested:

if (!jQuery.support.cors && window.XDomainRequest) {
    var httpRegEx = /^https?:///i;
    var getOrPostRegEx = /^get|post$/i;
    var sameSchemeRegEx = new RegExp('^'+location.protocol, 'i');
    var xmlRegEx = //xml/i;

    // ajaxTransport exists in jQuery 1.5+
    jQuery.ajaxTransport('text html xml json', function(options, userOptions, jqXHR){
        // XDomainRequests must be: asynchronous, GET or POST methods, HTTP or HTTPS protocol, and same scheme as calling page
        if (options.crossDomain && options.async && getOrPostRegEx.test(options.type) && httpRegEx.test(userOptions.url) && sameSchemeRegEx.test(userOptions.url)) {
            var xdr = null;
            var userType = (userOptions.dataType||'').toLowerCase();
            return {
                send: function(headers, complete){
                    xdr = new XDomainRequest();
                    if (/^d+$/.test(userOptions.timeout)) {
                        xdr.timeout = userOptions.timeout;
                    }
                    xdr.ontimeout = function(){
                        complete(500, 'timeout');
                    };
                    xdr.onload = function(){
                        var allResponseHeaders = 'Content-Length: ' + xdr.responseText.length + '
Content-Type: ' + xdr.contentType;
                        var status = {
                            code: 200,
                            message: 'success'
                        };
                        var responses = {
                            text: xdr.responseText
                        };

                                try {
                                    if (userType === 'json') {
                                        try {
                                            responses.json = JSON.parse(xdr.responseText);
                                        } catch(e) {
                                            status.code = 500;
                                            status.message = 'parseerror';
                                            //throw 'Invalid JSON: ' + xdr.responseText;
                                        }
                                    } else if ((userType === 'xml') || ((userType !== 'text') && xmlRegEx.test(xdr.contentType))) {
                                        var doc = new ActiveXObject('Microsoft.XMLDOM');
                                        doc.async = false;
                                        try {
                                            doc.loadXML(xdr.responseText);
                                        } catch(e) {
                                            doc = undefined;
                                        }
                                        if (!doc || !doc.documentElement || doc.getElementsByTagName('parsererror').length) {
                                            status.code = 500;
                                            status.message = 'parseerror';
                                            throw 'Invalid XML: ' + xdr.responseText;
                                        }
                                        responses.xml = doc;
                                    }
                                } catch(parseMessage) {
                                    throw parseMessage;
                                } finally {
                                    complete(status.code, status.message, responses, allResponseHeaders);
                                }
                            };
                            xdr.onerror = function(){
                                complete(500, 'error', {
                                    text: xdr.responseText
                                });
                            };
                            xdr.open(options.type, options.url);
                            //xdr.send(userOptions.data);
                            xdr.send();
                        },
                        abort: function(){
                            if (xdr) {
                                xdr.abort();
                            }
                        }
                    };
                }
            });
    };

jQuery.support.cors = true;

$.ajax({
    url : "http://api.geonames.org/citiesJSON",
    crossDomain: true,
    type : 'POST',
    cache : false,
    dataType : 'json',
    data : {
        username: "demo", 
        north:10, 
        south: 10, 
        east:10, 
        west:10}
}).done(function(data) {
    alert("Success: " + JSON.stringify(data));
}).fail(function(a, b, c, d) {
    alert("Failure: " 
          + JSON.stringify(a) + " " 
          + JSON.stringify(b) + " " 
          + JSON.stringify(c) + " " 
          + JSON.stringify(d) );
});

You may try it in this link: http://jsfiddle.net/bjW8t/4/

这篇关于IE 上的 AJAX POST 请求失败并显示错误“无传输"?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！