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XHR.html
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133 lines (110 loc) · 3.41 KB
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<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script>
var xhr = new XMLHttpRequest();
//open(methods, url, boolean) 参数: 要发送的请求的类型("get"、"post"等)、请求的 URL 和表示是否异步发送请求的布尔值
xhr.open("get", "example.txt", false);
xhr.send(null);
if((xhr.status >= 200 && xhr.status < 300) || xhr.status == 304){
alert(xhr.responseText);
}else{
alert("Request was unsuccessful:" + xhr.status);
}
// 取消请求
xhr.abort();
//http://youmightnotneedjquery.com
// $.getJSON('/url', function(data){ //Success! })
var request = new XMLHttpRequest();
request.open('GET', '/api/url', true);
request.onload = function(){
if(request.status >= 200 && request.status < 400){
//Success!
var data = JSON.parse(request.responseText);
}else{
// We reached our target server, but is returned an error.
}
};
request.onerror = function(){
// There was a connection error of some sort
};
request.send();
// $.ajax({ type: 'POST', URL: '/URL', data: data });
// $.post(?)
var request = new XMLHttpRequest();
request.open('POST', '/URL', true);
request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
request.send(data);
/*
$.ajax({
type: 'GET',
url: '/url',
success: function(resp){
//data
},
error: function(){
//error
}
});
*/
var request = new XMLHttpRequest();
request.open('GET', '/URL', true);
request.onload = function(){
if(request.status >= 200 && request.status < 400){
var resp = request.responseText;
// $("#box").text(resp);
// var box = $("#box");
// for(var i=0; i<resp.length; i++){
// box.append('<li>'+ resp[i].data + '</li>')
// }
} else {
//
}
};
request.onerror = function(){
// error
};
request.send();
//XHR 工厂
function createXHR(){
if(typeof XMLHttpRequest != 'undefined'){
return new XMLHttpRequest();
} else if (typeof ActiveXObject != 'undefined'){
if(typeof arguments.callee.activeXString != 'string'){
var versions = ["MSXML2.XMLHttp.6.0", "MSXML2.XMLHttp.3.0", "MSXML2.XMLHttp"], i, len;
for(i=0, len=versions.length; i <len; i++){
try{
new ActiveXObject(versions[i]);
arguments.callee.activeXString = versions[i];
break;
} catch(ex) {
// continue
}
}
}
return new ActiveXObject(arguments.callee.activeXString);
}else{
throw new Error("No XHR object available.")
}
}
//get
function requestGet(url, cb){
var request = createXHR();
request.open('GET', url, true);
request.onload = function(){
if(request.status >= 200 && request.status < 400){
var data = JSON.parse(request.responseText);
cb();
return data;
}else{
//
}
}
}
</script>
</body>
</html>