javascript/jquery读取和修改HTTP headers

时间：2023-12-13 08:39:56

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getResponseHeader或getAllResponseHeaders()可以获取指定的HTTP header field的值，但规定不能获取Set-Cookie和Set-Cookie2的值。

参考:

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