[#]: 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/