node服务端
app.post('/getdata',function(req,res,next){
req.setEncoding('utf8');
res.setHeader('Access-Control-Allow-Origin','*')
req.on('data',function(str){
var json = JSON.parse(str||"{}") ;
console.log(json)
})
res.end('already get data')
})
script前台页面
var req = new XMLHttpRequest();
if ("withCredentials" in req) {
// 此时即支持CORS的情况
// 检查XMLHttpRequest对象是否有“withCredentials”属性
// “withCredentials”仅存在于XMLHTTPRequest level 2对象里
} else {
// 否则检查是否支持XDomainRequest
// XDomainRequest仅存在于IE中,是IE用于支持CORS请求的方式
req = new XDomainRequest();
}
req.open('POST',"http://localhost:3000/getdata");
// req.setRequestHeader('Content-Type','text/plain')
// req.onreadystatechange = function(){
// if(req.readyState == 4 && req.status == 200){
// //var tt = req.getResponseHeader("Content-Type")
// alert(req.responseText);
// }
// }
req.onload = function(){
alert(req.responseText);
}
req.send('this is data')