How to stream a WordPress blog through a Rack app

intro

• rack app is on https://example.com
• wordpress blog is on http://blog.example.com (not https)
• rack-reverse-proxy is being used to stream the blog through https://example.com/blog

in rack app

using rack-reverse-proxy 1.0 (unreleased as of this writing. this was done using a4f28a6).

this example is for Rails, but you can easily adapt it to a general rack app

config.middleware.insert(0, Rack::ReverseProxy) do
  reverse_proxy_options preserve_host: false
  if Rails.env.production? or Rails.env.staging?
    reverse_proxy_options force_ssl: true, replace_response_host: true
  end
  reverse_proxy /^\/blog(\/?.*)$/, 'http://blog.example.com/blog$1'
end

on wordpress server

if apache or nginx root is /var/www/html, install wordpress in /var/www/html/blog

update wp_options set option_value = "https://example.com/blog" where option_name = "home" or option_name = "siteurl";

you might need to install this plugin: https://wordpress.org/plugins/ssl-insecure-content-fixer/

/etc/apache2/sites-enabled/000-default.conf

<VirtualHost *:80>
  Redirect 404 /
  ErrorDocument 404 "Page Not Found"
</VirtualHost>

<VirtualHost *:80>
  ServerName example.com # the server identifies as example.com and expects that in the HOST header, but example.com DNS points to heroku
  ServerAdmin webmaster@localhost
  DocumentRoot /var/www/html

  <Directory /var/www/html/>
      Options FollowSymLinks
      AllowOverride All
      Require all granted
  </Directory>

  ErrorLog ${APACHE_LOG_DIR}/error.log
  CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>