Move dev host rewriting into middleware

This makes matching against routes later much more reliable and less complicated

config/application.rb

@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 
 require_relative "boot"
-require_relative "../lib/custom_static_middleware"
+require_relative "../lib/middleware/custom_static_middleware"
+require_relative "../lib/middleware/dev_host_middleware"
 
 require "rails/all"
 
@@ -35,6 +36,7 @@ module Websites
     config.action_controller.action_on_unpermitted_parameters = :raise
     config.action_dispatch.default_headers.clear
 
+    config.middleware.insert_before(0, DevHostMiddleware) if Rails.env.development?
     config.middleware.insert_before(ActionDispatch::Static, CustomStaticMiddleware, {
       /^i\.furry\.cool/               => "/furry.cool/images",
       /^i\.maidboye\.cafe/            => "/maidboye.cafe/images",

config/default_config.rb

@@ -135,6 +135,8 @@ module Websites
     end
 
     def common_headers(domain)
+      # We don't want to set headers like HSTS in development
+      return {} if Rails.env.development?
       {
         "Report-To":                         {
           group:              "default",

config/routes/domain_constraint.rb

@@ -3,47 +3,25 @@
 class DomainConstraint
   attr_reader :domain, :subdomain
 
-  DEFAULT_DOMAIN = nil # "yiff.rest".freeze
+  DEFAULT_DOMAIN = nil # "yiff.rest"
-  USE_DEV_HOST = Rails.env.development?
-
-  def dev_host
-    "#{domain.tr('.', '-')}.websites.containers.local"
-  end
 
   def initialize(domain, subdomain = nil)
     @domain = domain
     @subdomain = subdomain
   end
 
-  def resolve_domains(current_host, level = 1)
-    current_subdomains = nil
-    if current_host.scan(".").length > level
-      parts = current_host.split(".")
-      current_host = parts.pop(level + 1).join(".")
-      current_subdomains = parts.join(".") if parts.length >= 1
-    end
-
-    [current_host, current_subdomains]
-  end
-
   def matches?(request)
-    host = domain
+    Rails.logger.info("Domain: #{@domain}; Subdomain: #{@subdomain}; Current Host: #{request.domain}; Current Subdomains: #{request.subdomain}; Matches (Domain): #{domain_matches?(request)}; Matches (Subdomain): #{subdomain_matches?(request)}") if Rails.env.development?
-    parse = request.domain
+    subdomain_matches?(request) && domain_matches?(request)
-    parse = "#{request.subdomains.join('.')}.#{request.domain}" unless request.subdomains.empty?
-    current_host, current_subdomains = resolve_domains(parse)
-    if Rails.env.development? && USE_DEV_HOST
-      if DEFAULT_DOMAIN.present?
-        current_host, current_subdomains = resolve_domains(DEFAULT_DOMAIN)
-      elsif request.query_parameters[:domain].present?
-        current_host, current_subdomains = resolve_domains(request.query_parameters[:domain])
-      elsif current_host.scan(".").length > 3
-        current_host, current_subdomains = resolve_domains(current_host, 3)
   end
 
-      current_host = dev_host if current_host == domain
+  private
-      host = dev_host
+
+  def domain_matches?(request)
+    @domain.nil? || request.domain == @domain
   end
-    Rails.logger.info("Host: #{host}; Subdomain: #{subdomain}; Current Host: #{current_host}; Current Subdomain: #{current_subdomains}; Matches (Domain): #{current_host == host}; Matches (Subdomain): #{current_subdomains == subdomain || subdomain&.to_sym == :any}") if Rails.env.development?
+
-    current_host == host && (current_subdomains == subdomain || subdomain&.to_sym == :any)
+  def subdomain_matches?(request)
+    @subdomain.nil? || request.subdomain == @subdomain
   end
 end

lib/middleware/dev_host_middleware.rb

@@ -0,0 +1,14 @@
+class DevHostMiddleware
+  def initialize(app)
+    @app = app
+  end
+
+  def call(env)
+    request = Rack::Request.new(env)
+    domain = request.params["domain"]
+
+    env["HTTP_HOST"] = domain if Rails.env.development? && domain
+
+    @app.call(env)
+  end
+end