RewriteEngine On
RewriteCond %{HTTPS} off 
# RewriteCond %{SERVER_PORT} !=443  
RewriteRule (.*) https://%{SERVER_NAME}/$1 [R,L]

server {
listen 80 default_server;
listen [::]:80 default_server;
<strong>server_name example.com www.example.com;</strong>
return 301 https://<strong>$server_name</strong>$request_uri;
}

# In the following example, the sed filter will change the string
# "monday" to "MON" and the string "sunday" to SUN in html documents
# before sending to the client.
<Directory "/var/www/docs/sed">
    AddOutputFilter Sed html
    OutputSed "s/monday/MON/g"
    OutputSed "s/sunday/SUN/g"
</Directory>

# In the following example, the sed filter will change the string
# "monday" to "MON" and the string "sunday" to SUN in the POST data
# sent to PHP.
<Directory "/var/www/docs/sed">
    AddInputFilter Sed php
    InputSed "s/monday/MON/g"
    InputSed "s/sunday/SUN/g"
</Directory>

<Location />
 AddOutputFilterByType SUBSTITUTE text/html
 Substitute "s|href="http://blog.dembowski.net/|href="https://blog.dembowski.net/|"
 Substitute "s|href='http://blog.dembowski.net/|href='https://blog.dembowski.net/|"
 Substitute "s|src=' http:|src='|"
 Substitute "s|src="http:|src="|"
</Location>

location / {
    sub_filter '<a href="http://127.0.0.1:8080/'  '<a href="https://$host/';
    sub_filter '<img src="http://127.0.0.1:8080/' '<img src="https://$host/';
    sub_filter_once on;
}

location / {
    subs_filter_types text/html text/css text/xml;
    subs_filter st(\d*).example.com $1.example.com ir;
    subs_filter a.example.com s.example.com;
}

location / {
    sub_filter_types text/html text/css text/xml;
    sub_filter 'http.example.com' 'https.example.com';
}