override the host. now it is complete. no more changes ever need to be made to this. ever.

README.md

@@ -19,7 +19,8 @@ MyApp::Application.configure do
     Rack::Lock, Rack::LiveReload,
     :min_delay => 500,
     :max_delay => 10000,
-    :port => 56789
+    :port => 56789,
+    :host => 'myhost.cool.wow'
   )
 end
 ```
@@ -42,9 +43,5 @@ such a way that the `HTTP_HOST` is used as the LiveReload host, so you can conne
 `mycomputer:3000` instead of `localhost:3000`) and as long as the LiveReload port is accessible from the external machine,
 you'll connect and be LiveReloading away!
 
-## To-do
-
-* Override the `host`
-
 As usual, super-alpha!
 

lib/rack/livereload.rb

@@ -22,7 +22,11 @@ module Rack
           body.each do |line|
             if !headers['X-Rack-LiveReload'] && line['</head>']
               src = LIVERELOAD_JS_PATH.dup
+              if @options[:host]
+                src << "?host=#{@options[:host]}"
+              else
                 src << "?host=#{env['HTTP_HOST'].gsub(%r{:.*}, '')}" if env['HTTP_HOST']
+              end
               src << "&mindelay=#{@options[:min_delay]}" if @options[:min_delay]
               src << "&maxdelay=#{@options[:max_delay]}" if @options[:max_delay]
               src << "&port=#{@options[:port]}" if @options[:port]

spec/rack/livereload_spec.rb

@@ -44,15 +44,17 @@ describe Rack::LiveReload do
     end
 
     context 'set options' do
-      let(:middleware) { described_class.new(app, :port => port, :min_delay => min_delay, :max_delay => max_delay) }
+      let(:middleware) { described_class.new(app, :host => new_host, :port => port, :min_delay => min_delay, :max_delay => max_delay) }
       let(:min_delay) { 5 }
       let(:max_delay) { 10 }
       let(:port) { 23 }
+      let(:new_host) { 'myhost' }
 
       it 'should add the livereload.js script tag' do
         body.should include("mindelay=#{min_delay}")
         body.should include("maxdelay=#{max_delay}")
         body.should include("port=#{port}")
+        body.should include("host=#{new_host}")
       end
     end
   end