Add a rack middleware to forbid access to unsafe IP addresses

lib/project-honeypot.rb

@@ -1,7 +1,8 @@
 require 'net/dns'
 require "project_honeypot/url"
 require "project_honeypot/base"
-require "project_honeypot/rack"
+require "project_honeypot/rack/header"
+require "project_honeypot/rack/forbidden"
 
 module ProjectHoneypot
   class << self

lib/project_honeypot/base.rb

@@ -1,4 +1,4 @@
-module ProjectHoneypot 
+module ProjectHoneypot
   class Base
     def initialize(api_key)
       @api_key = api_key
@@ -11,7 +11,7 @@ module ProjectHoneypot
       Url.new(ip_address, honeypot_score)
     end
 
-    private 
+    private
 
     def url_to_ip(url)
       return url if url.match(/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/)

lib/project_honeypot/rack/forbidden.rb

@@ -0,0 +1,21 @@
+module ProjectHoneypot::Rack
+  class Forbidden
+    def initialize(app, options={})
+      @app = app
+
+      raise ArgumentError, 'Must specify an API key' unless options[:api_key]
+      ProjectHoneypot.api_key = options[:api_key]
+    end
+
+    def call(env)
+      request = ::Rack::Request.new(env)
+      url = ProjectHoneypot.lookup(request.ip)
+
+      if url.safe?
+        @app.call(request.env)
+      else
+        [403, {"Content-Type" => "text/html"}, ["Forbidden"]]
+      end
+    end
+  end
+end

lib/project_honeypot/rack/header.rb

@@ -1,5 +1,5 @@
-module ProjectHoneypot
-  class Rack
+module ProjectHoneypot::Rack
+  class Header
     def initialize(app, options={})
       @app = app