Added collusion handling for FCGI

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@134 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

railties/environments/development.rb

@@ -9,4 +9,4 @@ require 'irb/completion'
 # tunnel when you want to connect from a different
 # computer over the internet. See the documentation of
 # Breakpoint.activate_drb for how to do that.
-Breakpoint.activate_drb('druby://localhost:42531', nil) if $0.include?("dispatch")
+Breakpoint.activate_drb('druby://l​ocalhost:42531', nil, !defined?(FastCGI)) if $0.include?("dispatch")

railties/lib/breakpoint.rb

@@ -359,11 +359,13 @@ module Breakpoint
   #
   # Detailed information about running DRb through firewalls is
   # available at http://www.rubygarden.org/ruby?DrbTutorial
-  def activate_drb(uri = 'druby://localhost:42531',
-    allowed_hosts = ['localhost', '127.0.0.1', '::1'])
+  def activate_drb(uri = nil, allowed_hosts = ['localhost', '127.0.0.1', '::1'],
+    ignore_collisions = false)
 
     return false if @use_drb
 
+    uri ||= 'druby://localhost:42531'
+
     if allowed_hosts then
       acl = ["deny", "all"]
 
@@ -380,6 +382,9 @@ module Breakpoint
     begin
       DRb.start_service(uri, @drb_service)
     rescue Errno::EADDRINUSE
+      if ignore_collisions then
+        nil
+      else
         # The port is already occupied by another
         # Breakpoint service. We will try to tell
         # the old service that we want its port.
@@ -392,6 +397,7 @@ module Breakpoint
         sleep(10)
         retry
       end
+    end
 
     return true
   end