Introduction to Ajax get and post requests
The following article brings you an in-depth understanding of Ajax get and post requests. The content is quite good, so I will share it with you now and give it as a reference.
1.get request
function ()
{
//向服务器请求 时间
//1.创建异步对象（小浏览器）
var xhr = new XMLHttpRequest();
//2.设置参数，true表示使用异步模式
xhr.open("get", "GetTime.ashx?name= Mr靖", true);
//3.让get请求不从浏览器获取缓存数据
xhr.setRequestHeader("If-Modified-Since","0");
//3.设置回调函数
xhr.onreadystatechange = function ()
{
//3.1当完全接收完响应报文后 并且 响应状态码为200的时候
if (xhr.readyState == 4 && xhr.status == 200)
{
//3.2获取相应报文体内容
var res = xhr.responseText;
alert(res);
}
};
//4.发送异步请求
xhr.send(null);
}2.post request
function ()
{
//向服务器请求 时间
//1.创建异步对象（小浏览器）
var xhr = new XMLHttpRequest();
//2.设置参数
xhr.open("post", "GetTime.ashx", true);
//3.设置 请求 报文体 的 编码格式（设置为 表单默认编码格式）
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
//4.设置回调函数
xhr.onreadystatechange = function ()
{
//3.1当完全接收完响应报文后 并且 响应状态码为200的时候
if (xhr.readyState == 4 && xhr.status == 200)
{
//3.2获取相应报文体内容
var res = xhr.responseText;
alert(res);
}
};
//5.发送异步请求"name=Mr靖"
//5.1格式：直接拼接字符串 key=value&key1=value2
xhr.send("name=Mr靖&age=18");
};The above is the entire content of this article, I hope it will be helpful to everyone Learning will be helpful. For more related content, please pay attention to the PHP Chinese website!
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The above is the detailed content of Introduction to Ajax get and post requests. For more information, please follow other related articles on the PHP Chinese website!
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