1、js ajax 设置自定义header
1.1 方法一:
$.ajax({
type: "POST",
url: "Handler1.ashx",
contentType: "application/x-www-form-urlencoded",
beforeSend: function (request) {
request.setRequestHeader("token1", "Chenxizhang");
},
success: function (data) {
//your code
}
});
1.2 方法二:
$.ajax({
headers: {
"testheader": "test"
},
type: "POST",
url: "Handler1.ashx",
contentType: "application/x-www-form-urlencoded",
success: function (data) {
//your code
}
});
2、js ajax 获取请求返回的response的header信息
ajax请求完成,会返回xhr(XMLHTTPRequest)对象,这里面会包含返回的头信息,可以通过getResponseHeader(key)和getAllResponseHeaders()获取header信息;
$.ajax({
type: "POST",
url: "Handler1.ashx",
contentType: "application/x-www-form-urlencoded",
success: function (data) {
//your code
},
complete: function (xhr, data) {
/*
获取相关Http Response header
getResponseHeader(key):获取指定头信息
getAllResponseHeaders():获取全部可默认可获取的头信息
*/
var date=xhr.getResponseHeader('Date');// 服务器端时间
//获取服务端自定义的header信息
var stoken = xhr.getResponseHeader('servertoken');
var list = xhr.getAllResponseHeaders();
console.log(list);
/*
date: Fri, 12 Jul 2019 12:41:00 GMT
content-encoding: gzip
server: Microsoft-IIS/10.0
x-aspnet-version: 4.0.30319
x-powered-by: ASP.NET
vary: Accept-Encoding
content-type: text/plain; charset=utf-8
servertoken: test1
cache-control: private
content-length: 129
*/
}
});
3、js ajax 跨域请求的情况下获取自定义的header信息
JS AJAX 跨域请求的时候是不能设置自定义的header信息的,但是是可以在response中获取到服务端自定义的header信息,前提是服务端设置了Access-Control-Expose-Headers;
下面是 ASP.NET 的服务端示例:
public void ProcessRequest(HttpContext context)
{
context.Response.AddHeader("Access-Control-Allow-Origin", "*");
context.Response.AddHeader("Access-Control-Allow-Headers", "*");
context.Response.AddHeader("Access-Control-Allow-Methods", "*");
//自定义header信息
context.Response.AddHeader("servertoken", "test");
context.Response.AddHeader("Access-Control-Expose-Headers", "servertoken");
context.Response.ContentType = "text/plain";
context.Response.Write("Hello World");
}
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