如何让浏览器停止缓存服务器响应？
我为自己构建的机器人开发了自己的自定义 Web 服务器（视频），但并不真正了解HTTP 的复杂性。我遇到的一个问题是我从浏览器发送一个请求，例如 http://192.168.2.10/r?cmd=doStuff 并且机器人做出响应。然后，我再次从浏览器发送相同的请求（通过单击我保存的书签），并且该请求永远不会发出，它只显示前一个请求的响应。
以下是来自浏览器（特别是 IE8）的内容：
GET /r?cmd=s HTTP/1.1
Accept: image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*
Accept-Language: en-US
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; Tablet PC 2.0; InfoPath.2; .NET4.0C; .NET4.0E; Zune 4.7)
Accept-Encoding: gzip, deflate
Host: 192.168.2.10
Connection: Keep-Alive
机器人响应如下：
HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Server: The Little Robot That Could 1.0
Date: Thu, 01 Jan 2009 00:05:00 GMT
Content-Length: 4
X-Powered-By: Little Robot HTTP Server
我是否需要添加一些其他 HTTP 标头以防止浏览器缓存响应？
I developed my own custom web server for a robot I built (video), without really knowing the intricacies of HTTP. One issue I am running into is I send a request from a browser, say, http://192.168.2.10/r?cmd=doStuff and the robot responds. Then I send the same request again from the browser (by clicking on a bookmark I saved), and the request never goes out, it just shows the response from the previous request.
Here is what comes from the browser (IE8 in particular):
GET /r?cmd=s HTTP/1.1
Accept: image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*
Accept-Language: en-US
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; Tablet PC 2.0; InfoPath.2; .NET4.0C; .NET4.0E; Zune 4.7)
Accept-Encoding: gzip, deflate
Host: 192.168.2.10
Connection: Keep-Alive
The robot responds with the following:
HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Server: The Little Robot That Could 1.0
Date: Thu, 01 Jan 2009 00:05:00 GMT
Content-Length: 4
X-Powered-By: Little Robot HTTP Server
Do I need to throw some other HTTP header into the mix to prevent the browser from caching the response?
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是的，您需要缓存控制标头。
Yes, you need cache-control header.
我会尝试添加一个 Pragma: no-cache。应该适用于任何现代浏览器。
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
I would try throwing in a Pragma: no-cache. Should work on any modern browser.
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
出色地。
这里真正的问题是使用 GET 来“做某事”。
Well.
The real problem here is using GET for "do something".