Hiding file extension and redirecting to https - apache

Question

First off, I know there are many questions similar to this one. I've read everything I can find, but the solutions I see elsewhere don't seem to work for me. I'm really hoping someone can give me some insight here.
I am trying to use Apache's .htaccess directives to force specific pages on my server to use ssl. In addition to those directives, I'm also using some rewrites to mask .php and .html extensions.
I created a page, https-test.html. I want that page specifically to always get redirected so it uses https and so that .html gets stripped off, like https://www.example.com/https-test
However, I seem to always end up with a loop. Reading the Apache docs for 6 hours got me closer, but I'm still missing something.
Below is my annotated htaccess file.
RewriteEngine on
# If port is insecure...
RewriteCond %{SERVER_PORT} ^80$
# And requested URI is /https-test...
RewriteCond %{REQUEST_URI} ^(.*/)https-test$ [NC]
# Then point the server to the secure url:
RewriteRule . "https://www.example.com/https-test" [L,R]
# The next few lines try matching extensionless requests to .php files
# If the requested file is not a directory...
RewriteCond %{REQUEST_FILENAME} !-d
# And we CAN find a .php file matching that name...
RewriteCond %{REQUEST_FILENAME}\.php -f
# Then point us to that .php file and append the query string.
RewriteRule ^(.+)$ $1.php [L,QSA]
# These next few lines were added by the previous project owner
# They're supposed to redirect requests like /foo.html to /foo,
# But I suspect these might be the culprit
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^\.]+)/$ /$1 [R=301,NE,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^\.]+)$ /$1.html [NE,L]
# Next few lines are legacy SEO stuff, some pages were linked to as
# php but now are html
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} .php$
RewriteRule ^(.*).php$ /$1.html [L,NE]
So that's the code I have in my htaccess. And if I go to http://www.example.com/https-test in Chrome, I get www.mysite.com redirected you too many times.

Answer 1

You should probably just rewrite the code a bit. You are trying to match both extensionless files to php and html and doesn't look like you're accounting for each of the conditions. You should add a condition to make sure they are not tryiing to do the same things.
Backup your code, replace your code with this and give it a try. Clear all your cache before trying.
RewriteEngine on
# If port is insecure... redirect for a specific page
RewriteCond %{HTTPS} !^on [OR]
RewriteCond %{HTTP_HOST} ^example\.com [NC]
RewriteRule ^http-test/?$ https://www.example.com%{REQUEST_URI} [R=301,L]
# Next few lines are legacy SEO stuff, some pages were linked to as
# php but now are html
RewriteCond %{THE_REQUEST} ^GET\ /(.+)\.php
RewriteRule ^ /%1? [R=301,L]
# The next few lines try matching extensionless requests to .php files
# If the requested file is not a directory and php file exists
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^(.+)$ $1.php [L,QSA]
#remove trailing slash and is not a php file
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php !-f
RewriteRule ^([^\.]+)/$ /$1 [R=301,NE,L]
#finally redirect extensionless URI to html
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^\.]+)$ /$1.html [NE,L]
Note I haven't tested this fully.