Added an EXPERIMENTAL gateway.cgi for getting high-speed performance through vanilla CGI using a long-running, DRb-backed server in the background (using script/listener and script/tracker) #1603 [Nicholas Seckar]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1676 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 57 insertions, 0 deletions

diff --git a/railties/dispatches/gateway.cgi b/railties/dispatches/gateway.cgi
new file mode 100644
index 0000000000..b8d44acef2
--- /dev/null
+++ b/railties/dispatches/gateway.cgi
@@ -0,0 +1,57 @@
+#!/usr/bin/ruby
+
+# This is an experimental feature for getting high-speed CGI by using a long-running, DRb-backed server in the background
+
+require File.join(File.dirname(__FILE__), 'drb')
+require 'cgi'
+
+VERBOSE = false
+
+AppName = File.split(File.expand_path(File.join(__FILE__, '..'))).last
+SocketPath = File.expand_path(File.join(File.dirname(__FILE__), '../log/drb_gateway.sock'))
+ConnectionUri = "drbunix:#{SocketPath}"
+attempted_start = false
+
+def start_tracker
+  tracker_path = File.join(File.dirname(__FILE__), '../script/tracker')
+  fork do
+    Process.setsid
+    STDIN.reopen "/dev/null"
+    STDOUT.reopen "/dev/null", "a"
+    
+    exec 'ruby', tracker_path, 'start', ConnectionUri
+  end
+  
+  $stderr.puts "dispatch: waiting for tracker to start..." if VERBOSE
+  10.times do
+    sleep 0.5
+    return if File.exists? SocketPath
+  end
+  
+  $stderr.puts "Can't start tracker!!! Dropping request!"
+  Kernel.exit 1
+end
+
+unless File.exists?(SocketPath)
+  $stderr.puts "tracker not running: starting it..." if VERBOSE
+  start_tracker
+end
+
+$stderr.puts "dispatch: attempting to contact tracker..." if VERBOSE
+tracker = DRbObject.new_with_uri(ConnectionUri)
+tracker.ping # Test connection
+
+$stdout.extend DRbUndumped
+$stdin.extend DRbUndumped
+  
+DRb.start_service "drbunix:", $stdin
+$stderr.puts "dispatch: publishing stdin..." if VERBOSE
+
+$stderr.puts "dispatch: sending request to tracker" if VERBOSE
+puts tracker.process($stdin)
+
+$stdout.flush
+[$stdin, $stdout].each {|io| io.close}
+$stderr.puts "dispatch: finished..." if VERBOSE
+
+