javascript - Js 科尔斯。否 'Access-Control-Allow-Origin'

Question

一切都很好 - 当我发送这样的请求时:

function toServer2(url, type, data, success) {
var XHR = ("onload" in new XMLHttpRequest()) ? XMLHttpRequest : XDomainRequest;

var xhr = new XHR();
xhr.open(type, url, true);     
xhr.send();}

415 响应 - 当我发送这样的请求时:

function toServer2(url, type, data, success) {
var XHR = ("onload" in new XMLHttpRequest()) ? XMLHttpRequest : XDomainRequest;

var xhr = new XHR();
xhr.open(type, url, true);     
xhr.send(data);} // data = "{'name': 'Ben', count: 12}"

没有“Access-Control-Allow-Origin” - 当我发送这样的请求时:

function toServer2(url, type, data, success) {
var XHR = ("onload" in new XMLHttpRequest()) ? XMLHttpRequest : XDomainRequest;

var xhr = new XHR();
xhr.open(type, url, true);   

xhr.setRequestHeader('Content-Type', 'application/json; charset=UTF-8');

xhr.send(data);} // data = "{'name': 'Ben', count: 12}"

Answer 1

接收 AJAX 调用的服务器必须在响应中发送 CORS header ，因为它位于不同的端口上。检查这个:http://www.html5rocks.com/en/tutorials/cors/