Nginx reverse proxy to third party website with rewritten content and working booking process (with limitations) - demo for s8

testing-nginx-reverse-proxy-to-showcase-for-s8.conf

# Set up the s8.beveradb.com subdomain by default as a reverse proxy to andrew's website with rewrite rule for links, assets etc.
location / {
    proxy_ssl_server_name on;
    proxy_pass https://andrewbeveridge.co.uk/;

    sub_filter_types *;
    sub_filter_once off;
    sub_filter 'andrewbeveridge.co.uk' 's8.beveradb.com';
}

# Set up the showcase path as a reverse proxy to showcasecinemas' website, with rewrite rules for assets, and hide header/footer
location /showcase/ {
    # Proxy requests starting with /showcase/ to the showcase domain, with path
    proxy_ssl_server_name on;
    proxy_pass https://www.showcasecinemas.co.uk/;
    
    # Perform filters/replacements below on all file types (e.g. css/js), not just HTML
    sub_filter_types *;
    sub_filter_once off;

    # Rewrite most assets (e.g. CSS, JS) to fetch from subdirectory
    sub_filter 'href="/' 'href="/showcase/';
    sub_filter "href='/" "href='/showcase/";
    sub_filter 'src="/'  'src="/showcase/';
    sub_filter "src='/"  "src='/showcase/";
    sub_filter 'url("/'  'url("/showcase/';
    sub_filter "url('/"  "url('/showcase/";
    sub_filter "url(/"   "url(/showcase/";

    # Some assets try to load from this subdomain - possibly just ads or tracking though
    sub_filter "https://as.showcasecinemas.co.uk"   "/showcase-as";

    # Inject CSS to hide the header and footer
    sub_filter '</head>' '<style>.section-header, .section-footer {display: none;}</style></head>';
}

# Needed for some assets to load - possibly just ads or tracking though
location /showcase-as/ {
    proxy_ssl_server_name on;
    proxy_pass https://as.showcasecinemas.co.uk/;
}

# Some bit of JS code must have hard-coded the /booking URL so we have to redirect this
location /booking/ {
    # Proxy requests starting with /showcase/ to the showcase domain, with path
    proxy_ssl_server_name on;
    proxy_pass https://www.showcasecinemas.co.uk/booking/;

    # Perform filters/replacements below on all file types (e.g. css/js), not just HTML
    sub_filter_types *;
    sub_filter_once off;

    # Rewrite most assets (e.g. CSS, JS) to fetch from subdirectory
    sub_filter 'href="/' 'href="/showcase/';
    sub_filter "href='/" "href='/showcase/";
    sub_filter 'src="/'  'src="/showcase/';
    sub_filter "src='/"  "src='/showcase/";
    sub_filter 'url("/'  'url("/showcase/';
    sub_filter "url('/"  "url('/showcase/";
    sub_filter "url(/"   "url(/showcase/";

    # Some assets try to load from this subdomain - possibly just ads or tracking though
    sub_filter "https://as.showcasecinemas.co.uk"   "/showcase-as";
}

# Some of the JS code loaded hard-codes this path, this is a bit of a lazy way to get it working without wasting too much time reverse-engineering their JS code.
location /booking {
    # Proxy requests starting with /showcase/ to the showcase domain, with path
    proxy_ssl_server_name on;
    proxy_pass https://www.showcasecinemas.co.uk/booking;

    # Perform filters/replacements below on all file types (e.g. css/js), not just HTML
    sub_filter_types *;
    sub_filter_once off;

    # Rewrite most assets (e.g. CSS, JS) to fetch from subdirectory
    sub_filter 'href="/' 'href="/showcase/';
    sub_filter "href='/" "href='/showcase/";
    sub_filter 'src="/'  'src="/showcase/';
    sub_filter "src='/"  "src='/showcase/";
    sub_filter 'url("/'  'url("/showcase/';
    sub_filter "url('/"  "url('/showcase/";
    sub_filter "url(/"   "url(/showcase/";

    # Some assets try to load from this subdomain - possibly just ads or tracking though
    sub_filter "https://as.showcasecinemas.co.uk"   "/showcase-as";
}

location /umbraco/ {
    # Proxy requests starting with /showcase/ to the showcase domain, with path
    proxy_ssl_server_name on;
    proxy_pass https://www.showcasecinemas.co.uk/umbraco/;
}

location /Umbraco/ {
    # Proxy requests starting with /showcase/ to the showcase domain, with path
    proxy_ssl_server_name on;
    proxy_pass https://www.showcasecinemas.co.uk/Umbraco/;
}