PRF&PUB

@geekpi https://linux.cn/article-13795-1.html
2026-09-04 04:32:49 +08:00 · 2021-09-17 22:51:23 +08:00
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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"
+[#]: 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.
+
+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/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.
+
+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.
+```
+
+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]
+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)
+[3]: https://creativecommons.org/licenses/by-sa/4.0/