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javascript/jquery读取和修改HTTP headers

2016-10-28 11:49 218 查看

javascript/jquery读取和修改HTTP headers

jquery修改HTTP headers

jQuery Ajax可以通过

headers

或

beforeSend

修改request的HTTP headers，例如：

$.ajax({
url: "./test.php",
type: "POST",
headers: {
"Accept" : "text/plain; charset=utf-8",
"Content-Type": "text/plain; charset=utf-8"
},
/*
beforeSend: function(jqXHR, settings) {
jqXHR.setRequestHeader('Accept', 'text/plain; charset=utf-8');
jqXHR.setRequestHeader('Content-Type', 'text/plain; charset=utf-8');
},
*/
data: {"user" : "min", "pass" : "he"},
error: function(jqXHR, textStatus, errorThrown) {
//....
},
success: function(data, textStatus, jqXHR) {
//....
}
}

注意：：W3规定XMLHttpRequest并不能修改全部的HTTP Headers，而仅是一小部分。

jquery获取HTTP headers:

test.html:

<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"></script>
</head>
<body></body>
<script type="text/javascript">
$(document).ready(function(){
$.ajax({
url: "./test.php",
type: "POST",
data: {"user" : "min", "pass" : "he"},
error: function(jqXHR, textStatus, errorThrown) {
if (textStatus == "error") {
alert(textStatus + " : " +errorThrown);
} else {
alert(textStatus);
}
},
success: function(data, textStatus, jqXHR) {
alert(jqXHR.getResponseHeader("Server"));
alert(jqXHR.getResponseHeader("Content-Type"));
alert(jqXHR.getResponseHeader("X-Powered-By"));
alert(jqXHR.getResponseHeader("Content-Encoding"));
alert(jqXHR.getAllResponseHeaders());
alert(jqXHR.getResponseHeader("Set-Cookie"));       //返回null，不能获取Set-Cookie的值
alert(data + textStatus);
}
});
});
</script>
</html>

test.php:

<?php
if (isset($_COOKIE["time"])) {
$time = $_COOKIE["time"] + 1;
} else {
$time = 1;
}
setcookie("time", $time);

$user = $_REQUEST["user"];
$pass = $_REQUEST["pass"];
print $user.$pass." ".$time;

jQuery通过XMLHttpRequest的