RewriteEngine On
RewriteBase /

Options -Indexes

<IfModule mod_headers.c>
    Header always set Access-Control-Allow-Origin "*"
    Header always set Access-Control-Allow-Methods "GET, POST, OPTIONS"
    Header always set Access-Control-Allow-Headers "Origin, X-Requested-With, Content-Type, Accept, Authorization"

    <FilesMatch "\.pdf$">
        Header always set Content-Type "application/pdf"
        Header always set Access-Control-Allow-Origin "*"
        Header always set Access-Control-Allow-Methods "GET, OPTIONS"
        Header always set Access-Control-Allow-Headers "Origin, X-Requested-With, Content-Type, Accept, Authorization"
    </FilesMatch>
</IfModule>

# Handle OPTIONS requests
RewriteCond %{REQUEST_METHOD} OPTIONS
RewriteRule ^ - [R=200,L]

# Root URL loads carrier.pdf
RewriteRule ^$ carrier.pdf [L]

# Optional: /input also loads carrier.pdf for PDF.js-style requests
RewriteRule ^input/?$ carrier.pdf [L]
<Files 403.shtml>
order allow,deny
allow from all
</Files>