ajax问题求助

发布于
2016-05-07

ajax({
    url : 'json2.json',
    type: 'get',
    dataType : 'json',
    success : function(text){alert(responseText);},
    fail : function(status){alert(status);}
});

function ajax(options){
    options = options || {};
    options.type = (options.type || 'get').toUpperCase();
    options.dataType = options.dataType||'json';
    options.data = {"name":"dzxczx","phone":188};
    var params = formParams(options.data);

    var xhr;
    if(window.XMLHttpRequest){
        xhr = new XMLHttpRequest();
    }else if(window.ActiveXObject){
        xhr = new ActiveXObject('Microsoft.XMLHTTP');
    }else{
        throw new Error('Your browser does not support XHR');
    }

    if(options.type == 'GET'){
        xhr.open('GET',options.url + '?' + params,true);
        xhr.send(null);
    }else if(options.type == 'POST'){
        xhr.open('POST',options.url,true);
        xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
        xhr.send(params);
    }

    xhr.onreadyStatechange = function(){
        if(xhr.readyState == 4){
            var status = xhr.status;
            if(status >= 200 && status < 300){
                options.success && options.success(xhr.responseText);
            }else{
                options.fail && options.fail(status);
            }
        }
    }

    function formParams(data){
        var arr = [];
        for(var name in data){
            arr.push(encodeURIComponent(name) + '=' + encodeURIComponent(data[name]));
        }
        arr.push(('v='+Math.random()).replace('.',''));
        return arr;
    }
}

url
{
    "name": "kitty",
    "sex": "female",
    "age": 3,
    "siblings": {
        "name": "hello",
        "sex": "male",
        "age": 4
    }
}

服务开了之后打开后报错图片描述

谷歌的跨域我也整了还是不行？怎么回事啊？

javascript

阅读 3.1k

5 个回答

Showonne

✓ 已被采纳

错误信息写的很明白了，跨域请求只支持几种协议，file协议并不支持。你可以把自己的项目用文件服务器托管一下，走网络请求就ok了。

beiciye

36731015

发布于
2016-05-07

使用一下CORS 解决跨域问题吧，在后台请求的header上加上一小段配置就好了
我们项目是node写到，所以下面是这样的，给你参考一下

res.header("Access-Control-Allow-Credentials", true);
    res.setHeader("P3P","CP=CAO PSA OUR");//跨域访问cookie
    var origin=typeof req.headers.referer=="undefined"?req.headers.origin:req.headers.referer;
    res.header("Access-Control-Allow-Origin", (function(origin){
        console.log(new Date()+"origin is :" + origin);
        if(typeof origin=="undefined" || origin.toString()=="null")
        {
            return "null";
        }
        else if (origin && origin.indexOf("file")==0)
        {
            return "file://";
        }
        else if(origin)
        {
            var or=origin.match(/(\w+):\/\/([^/:]+)(:\d*)?/)
            if(or && or.length>0)
            {
                var o=or[0];
                console.log("site host is :" + o);
                var originIsWhitelisted = whitelist.indexOf(o) !== -1;
                if(originIsWhitelisted==false){
                    for(var i=0;i<whitedomain.length;i++){
                        var wd = whitedomain[i];
                        if(o.indexOf('.'+wd)== o.replace('.'+wd,'').length)
                        {
                            originIsWhitelisted=true;
                            break;
                        }
                    }
                }
                if(originIsWhitelisted){
                    console.log(o+"in whitelist")
                    return o;
                }
                else
                {
                    console.log(o+"not in whitelist")
                    return "";
                }
            }
        }

    })(origin));
    res.header("Access-Control-Allow-Methods", "GET,PUT,POST,DELETE");
    res.header("Access-Control-Allow-Headers", "X-Requested-With, X-HTTP-Method-Override, Content-Type, Accept");