Add support for proxying to a unix domain socket.

.rspec

@@ -0,0 +1,2 @@
+--format=documentation
+--color

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    em-proxy (0.1.6)
+    em-proxy (0.1.7)
       eventmachine
 
 GEM
@@ -17,7 +17,7 @@ GEM
       http_parser.rb (>= 0.5.2)
     em-socksify (0.1.0)
       eventmachine
-    eventmachine (1.0.0.beta.4)
+    eventmachine (1.0.0)
     http_parser.rb (0.5.3)
     rake (0.9.2.2)
     rspec (2.7.0)

lib/em-proxy/connection.rb

@@ -43,11 +43,20 @@ def relay_to_servers(processed)
       # initialize connections to backend servers
       #
       def server(name, opts)
-        srv = EventMachine::bind_connect(opts[:bind_host], opts[:bind_port], opts[:host], opts[:port], EventMachine::ProxyServer::Backend, @debug) do |c|
-          c.name = name
-          c.plexer = self
-          c.proxy_incoming_to(self, 10240) if opts[:relay_server]
+        if opts[:socket]
+          srv = EventMachine::connect_unix_domain(opts[:socket], EventMachine::ProxyServer::Backend, @debug) do |c|
+            c.name = name
+            c.plexer = self
+            c.proxy_incoming_to(self, 10240) if opts[:relay_server]
+          end
+        else
+          srv = EventMachine::bind_connect(opts[:bind_host], opts[:bind_port], opts[:host], opts[:port], EventMachine::ProxyServer::Backend, @debug) do |c|
+            c.name = name
+            c.plexer = self
+            c.proxy_incoming_to(self, 10240) if opts[:relay_server]
+          end
         end
+
         self.proxy_incoming_to(srv, 10240) if opts[:relay_client]
 
         @servers[name] = srv

spec/helper.rb

@@ -1,5 +1,6 @@
 require 'bundler/setup'
 require 'em-http'
 require 'pp'
+require 'tmpdir'
 
 require 'em-proxy'

spec/proxy_spec.rb

@@ -68,7 +68,7 @@ def failed
       end
 
       Proxy.start(:host => "0.0.0.0", :port => 8080) do |conn|
-        conn.server :bing, :host => "google.com", :port => 80
+        conn.server :goog, :host => "google.com", :port => 80
         conn.server :yhoo, :host => "yahoo.com", :port => 80
         conn.on_data { |data| data }
 
@@ -164,4 +164,63 @@ def failed
       end
     }.should_not raise_error
   end
+
+  context "with a server listening on a TCP port" do
+    before :each do
+      @host = '127.0.0.1'
+      @port = 4242
+      @pid = spawn("ruby spec/support/echo_server.rb #{@host} #{@port}")
+      sleep 1 # let the server come up
+    end
+    after :each do
+      Process.kill('QUIT', @pid)
+    end
+    it "should connect to a unix socket" do
+      connected = false
+      EM.run do
+        EventMachine.add_timer(0.1) do
+          EventMachine::HttpRequest.new('http://127.0.0.1:8080/').get({:timeout => 1})
+        end
+        host = @host
+        port = @port
+        Proxy.start(:host => "0.0.0.0", :port => 8080) do |conn|
+          conn.server :local, :host => host, :port => port
+          conn.on_connect do |name|
+            connected = true
+            EventMachine.stop
+          end
+        end
+      end
+      connected.should == true
+    end
+  end
+
+  context "with a server listening on a unix socket" do
+    before :each do
+      @socket = File.join(Dir.tmpdir, 'em-proxy.sock')
+      @pid = spawn("ruby spec/support/echo_server.rb #{@socket}")
+      sleep 1 # let the server come up
+    end
+    after :each do
+      Process.kill('QUIT', @pid)
+    end
+    it "should connect to a unix socket" do
+      connected = false
+      EM.run do
+        EventMachine.add_timer(0.1) do
+          EventMachine::HttpRequest.new('http://127.0.0.1:8080/').get({:timeout => 1})
+        end
+        socket = @socket
+        Proxy.start(:host => "0.0.0.0", :port => 8080) do |conn|
+          conn.server :local, :socket => socket
+          conn.on_connect do |name|
+            connected = true
+            EventMachine.stop
+          end
+        end
+      end
+      connected.should == true
+    end
+  end
+
 end

spec/support/echo_server.rb

@@ -0,0 +1,18 @@
+require 'eventmachine'
+
+module EchoServer
+  def receive_data data
+    send_data ">>>you sent: #{data}"
+    close_connection if data =~ /quit/i
+  end
+end
+
+EventMachine.run do
+  if ARGV.count == 2
+    EventMachine.start_server ARGV.first, ARGV.last.to_i, EchoServer
+  elsif ARGV.count == 1
+    EventMachine.start_server ARGV.first, EchoServer
+  else
+    raise "invalid number of params, expected [server] ([port])"
+  end
+end