Force SSL HTTPS for subdomain with .htaccess

Question

I have this code for forcing SSL on a website generally:

RewriteCond %{HTTPS} !=on
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

Answer 1

To avoid using the domain or subdomain names I used to use the following code:

  # Redirect HTTP to HTTPS
  RewriteCond %{HTTPS} off
  RewriteCond %{HTTP:X-Forwarded-Proto} !https
  RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

I prefer without WWW.

%{HTTPS} Set to on if the request is served over SSL.

%{HTTP_HOST} Everything between the protocol (http:// or https://) and the request (/example-file.txt).

%{REQUEST_URI} Everything after the server address — for example, a request to http://example.com/my/example-file.txt sets this value as my/example-file.txt.

%{HTTP:X-Forwarded-Proto} The protocol used when the URL was requested — set to http or https.

I hope it can be useful for anybody.

Answer 2

For debugging I use a website I found http://martinmelin.se/rewrite-rule-tester/

Using the rules you provided

RewriteCond %{HTTPS} !=on
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

I got an error at

RewriteCond %{HTTPS} !=on

This might work for you

RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{SERVER_NAME}/%$1 [R,L] 

Found the above example at https://www.sslshopper.com/apache-redirect-http-to-https.html