[AWS][CloudFront] CloudFront で HTTPS リクエストを受け付けた場合に X-Forwarded-Proto をちゃんとアプリケーションに渡すには？ ref: http://qiita.com/wokamoto/items/2a090ec0c82bcedab12a

httpd.conf

SetEnvIf  CloudFront-Forwarded-Proto "https" HTTPS
RequestHeader set X-Forwarded-Proto "https" env=HTTPS

nginx.conf

server {

    ...

    set $proxy_https '';
    if ( $http_cloudfront_forwarded_proto = 'https' ) {
        set $proxy_https 'on';
    }
    if ( $http_x_forwarded_proto = 'https' ) {
        set $proxy_https 'on';
    }
    if ( $scheme = 'https' ) {
        set $proxy_https 'on';
    }

    location ~ \.php$ {
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass   phpfpm;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  $script_root$fastcgi_script_name;
        fastcgi_param  HTTPS            $proxy_https  if_not_empty;
        include        fastcgi_params;
    }
}