JQuery Ajax 请求：更改用户代理
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JQuery Ajax Request: Change User-Agent
提问by theomega
I'm using JQuery to issue a AJAX-Request to my own Webservice. I need to set or modify the User-AgentHTTP-Header for the HTTP-AJAX-Request, how can I do this the easiest way?
我正在使用 JQuery 向我自己的 Web 服务发出 AJAX 请求。我需要User-Agent为 HTTP-AJAX-Request设置或修改HTTP-Header，我怎样才能以最简单的方式做到这一点？
I tried the hint provided by some users to use the setRequestHeaderMethod to set the User-Agent, but this does not work. It does in fact work for other newly created headers (like X-Test-Header) but it does not work for User-Agent.
我尝试了一些用户提供的提示，使用setRequestHeaderMethod设置User-Agent，但这不起作用。它实际上适用于其他新创建的标头（如X-Test-Header），但不适用于User-Agent.
Thanks!
谢谢！
回答by theomega
It is simply impossible, you are not allowed to change the user-agent for XMLHttpRequests. I'm not sure if this is valid for Internet-Explorer, but the w3c specifies here:
这是不可能的，您不能更改 XMLHttpRequests 的用户代理。我不确定这对 Internet-Explorer 是否有效，但 w3c在此处指定：
The setRequestHeader() method
[...]
When the setRequestHeader(header, value) method is invoked, the user agent must run these steps: [...]
Terminate these steps if header is a case-insensitive match for one of the following headers:
[...]
- User-Agent
setRequestHeader() 方法
[...]
当调用 setRequestHeader(header, value) 方法时，用户代理必须运行以下步骤： [...]
如果标头是以下标头之一的不区分大小写的匹配，则终止这些步骤：
[...]
- 用户代理
回答by Peter Olson
If you are using jQuery, set the request header in the ajaxSetup.
如果您使用的是 jQuery，请在 ajaxSetup 中设置请求标头。
$.ajaxSetup({
beforeSend: function(request) {
request.setRequestHeader("User-Agent","InsertUserAgentStringHere");
}
});
回答by Lucas
Well, you could always use jQuery to post to a server-side page which then in turn is able to modify the User-Agentheader, and also make a request to the page which would have been directly accessed by jQuery.
好吧，您总是可以使用 jQuery 发布到服务器端页面，然后该页面又可以修改User-Agent标题，并且还可以向 jQuery 直接访问的页面发出请求。
