TranslateProject/published/202109/20210908 Debug a web page error from the command line.md

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[#]: subject: "Debug a web page error from the command line"
[#]: via: "https://opensource.com/article/21/9/wget-debug-web-server"
[#]: author: "Jim Hall https://opensource.com/users/jim-hall"
[#]: collector: "lujun9972"
2021-09-09 08:43:47 +08:00
[#]: translator: "geekpi"
[#]: reviewer: "wxy"
[#]: publisher: "wxy"
[#]: url: "https://linux.cn/article-13795-1.html"
从命令行使用 wget 调试网页错误
======
> 调试 Web 服务器的一种方法是使用 wget 命令行程序。
![](https://img.linux.net.cn/data/attachment/album/202109/17/225018elcip4pii4qcknir.jpg)
有时在管理一个网站时,事情会被搞得一团糟。你可能会删除一些陈旧的内容,用重定向到其他页面来代替。后来,在做了其他改动后,你发现一些网页变得完全无法访问了。你可能会在浏览器中看到一个错误:“该页面没有正确重定向”,并建议你检查你的 cookie。
![Redirect loop example in Firefox][2]
调试这种情况的一个方法是使用 `wget` 命令行程序,使用 `-S` 选项来显示所有的服务器响应。当使用 `wget` 进行调试时,我也喜欢使用 `-O` 选项将输出保存到一些临时文件中,以备以后需要查看其内容。
```
$ wget -O /tmp/test.html -S http://10.0.0.11/announce/
--2021-08-24 17:09:49-- http://10.0.0.11/announce/
Connecting to 10.0.0.11:80... connected.
2021-09-13 11:19:08 +08:00
HTTP request sent, awaiting response...
2021-09-13 11:19:08 +08:00
HTTP/1.1 302 Found
Date: Tue, 24 Aug 2021 22:09:49 GMT
Server: Apache/2.4.48 (Fedora)
X-Powered-By: PHP/7.4.21
Location: http://10.0.0.11/assets/
Content-Length: 0
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html; charset=UTF-8
Location: http://10.0.0.11/assets/ [following]
--2021-08-24 17:09:49-- http://10.0.0.11/assets/
Reusing existing connection to 10.0.0.11:80.
2021-09-13 11:19:08 +08:00
HTTP request sent, awaiting response...
HTTP/1.1 302 Found
Date: Tue, 24 Aug 2021 22:09:49 GMT
Server: Apache/2.4.48 (Fedora)
X-Powered-By: PHP/7.4.21
Location: http://10.0.0.11/announce/
Content-Length: 0
Keep-Alive: timeout=5, max=99
Connection: Keep-Alive
Content-Type: text/html; charset=UTF-8
Location: http://10.0.0.11/announce/ [following]
--2021-08-24 17:09:49-- http://10.0.0.11/announce/
Reusing existing connection to 10.0.0.11:80.
.
.
.
20 redirections exceeded.
```
2021-09-13 11:19:08 +08:00
我在这个输出中省略了很多重复的内容。通过阅读服务器的响应,你可以看到 `http://10.0.0.11/announce/` 立即重定向到 `http://10.0.0.11/assets/`,然后又重定向到 `http://10.0.0.11/announce/`。以此类推。这是一个无休止的循环,`wget` 将在 20 次重定向后退出。但有了这些调试信息,你可以修复重定向,避免循环。
--------------------------------------------------------------------------------
via: https://opensource.com/article/21/9/wget-debug-web-server
作者:[Jim Hall][a]
选题:[lujun9972][b]
2021-09-13 11:19:08 +08:00
译者:[geekpi](https://github.com/geekpi)
校对:[wxy](https://github.com/wxy)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译,[Linux中国](https://linux.cn/) 荣誉推出
[a]: https://opensource.com/users/jim-hall
[b]: https://github.com/lujun9972
[1]: https://opensource.com/sites/default/files/styles/image-full-size/public/lead-images/browser_web_internet_website.png?itok=g5B_Bw62 (Digital creative of a browser on the internet)
[2]: https://opensource.com/sites/default/files/uploads/firefox-redirect-loop.png (Redirect loop example in Firefox)
2021-09-13 11:19:08 +08:00
[3]: https://creativecommons.org/licenses/by-sa/4.0/