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#+date: [2021-10-09 Sat 00:00:00]
#+title: Apache Rewrite Rules for Extensionless URLs
#+description: Using mod_rewrite to serve clean, extensionless URLs in Apache.
#+slug: apache-redirect
#+filetags: :web:
* The Problem
After recently switching static site generators (SSG), my blog URLs (uniform
resource locators) changed with no option to preserve the classic =.html=
extension at the end of my blog post URLs.
I really disliked using my old SSG ([[https://jekyllrb.com][Jekyll]]) and prefer my new tool ([[https://www.getzola.org][Zola]]) much
more, so I was determined to figure out a way to get the proper redirect set up
so that people who find my posts online aren't constantly met by 404 errors.
* The Solution
To solve this problem, I really needed to solve two pieces:
1. Redirect all blog post URL requests from =/blog/some-post.html= to
=/blog/some-post/=.
2. Ensure that no other =.html= files are redirected, such as =index.html=.
After /a lot/ of tweaking and testing, I believe I have finally found the
solution. The solution is shown below.
#+begin_src conf
RewriteEngine On
RewriteCond %{REQUEST_URI} !\index.html$ [NC]
RewriteRule ^(.*).html$ https://example.com/$1 [R=301,L]
#+end_src
This piece of code in the Apache =.conf= or =.htaccess= file will do the
following:
1. Turn on the RewriteEngine so that we can modify URLs.
2. Ignore any =index.html= files from the rule we are about to specify.
3. Find any =.html= files within the website directory and redirect it to
exclude the file extension.
4. The final piece is adding the trailing slash (=/=) at the end of the URL -
you'll notice that I don't have an Apache rule for that since Apache handles
that automatically.
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