HTTP Referrer和IE7和IE8 [英] HTTP Referrer and IE7 and IE8

问题描述

您好我已尝试以下方法在MSIE / IE7和IE8中找到推荐人，但每次都返回空白;

Hi i've tried the following to find the referrer in MSIE / IE7 and IE8 but its returning blank each time;

PHP：

<?
echo $_SERVER['HTTP_REFERER'];
?>

JAVASCRIPT：

document.write('Thanks for visiting from ' + document.referrer);

有没有人知道问题是什么我正在使用另一个页面上的document.location来引用它域名，并与所有其他浏览器一起工作，减去MSIE。

Does any know what the issue could be I'm referering using document.location from a page on another domain and work fine with all other browsers minus MSIE.

任何帮助都会很棒！

推荐答案

HTTP Referer header < HTTP协议不要求/ a>：

The HTTP Referer header is not required by the HTTP Protocol :

• 它仅作为信息发送


• 浏览器可以或不可以发送（这可以解释为什么你用某些浏览器获取它，而不是用其他浏览器获取它）


• 有些防火墙/安全软件可能会删除它，我想，在某些情况下（我已经看到，几年前，如果我没记错的话）


• 用户可以轻松伪造

• It is only sent as an information
• The browser can, or cannot, send it (Which would explain why you're getting it with some browsers, and not getting it with some others)
• Some firewall / security software could remove it, I suppose, in some situations (I've seen that, some years ago, if I remember correctly)
• It can be forged easily by the user

这意味着你不能依赖<$ y的c $ c> Referer 我们的应用程序：你可以使用它来提供一些额外的功能，但你的应用程序必须工作，即使它不存在或不正确。

Which means that you cannot rely on the Referer for your application : you can use it to provide some additionnal functionnality, but your application must work even if it's not there, or not correct.

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