From rcorsaro at optaros.com  Fri Dec 21 11:04:59 2007
From: rcorsaro at optaros.com (Robert C Corsaro)
Date: Fri, 21 Dec 2007 11:04:59 -0500
Subject: MouseHole Dead?
Message-ID: <476BE42B.1010200@optaros.com>

Hi,

Trying to get trunk working.  Seems a little broken.  Can I assume it 
worked at some point?  I'm using mongrel 1.1.2 and most of the problems 
seem to be because of mongrel.  It has probably changed some in the past 
8 months.  The first problem is lib/mouseHole/app.rb(line 33) :

     def initialize server, klass_name = nil, model = nil, rb = nil
       klass_name ||= self.class.name
       self.model = model
       self.title = klass_name
       METADATA.each do |f|
         self.send("#{f}=", self.class.send("default_#{f}"))
       end
       self.klass = klass_name
       self.path = rb
       if self.handlers
         self.handlers.each do |h_is, h_name, h_blk|
           next unless h_is == :mount
	  server.unregister "/#{h_name}"
	  server.register "/#{h_name}", h_blk
         end
       end
       basic_setup
     end



The unregister method throws an exception if the h_name isn't 
registered.  This is probably just there for safety and mongrel probably 
didn't throw an exception when it was written.  Here is an ugly patch, 
feel free to make a better one:



Index: lib/mouseHole/app.rb
===================================================================
--- lib/mouseHole/app.rb	(revision 124)
+++ lib/mouseHole/app.rb	(working copy)
@@ -30,7 +30,14 @@
        if self.handlers
          self.handlers.each do |h_is, h_name, h_blk|
            next unless h_is == :mount
-          server.unregister "/#{h_name}"
+          # BOB_HACK:  unregister throws an exception if the h_name isn't
+          # registered, so I catch it
+          begin
+            server.unregister "/#{h_name}"
+          rescue
+            print "no problem"
+          end
+          # END BOB_HACK
            server.register "/#{h_name}", h_blk
          end
        end

I've also attached it in case my email is ugly.

The second problem is in bin/mouseHole.  We are trying to register the 
uri "http:", but mongrel only allows uris that start with "/".  This 
throws a really ugly nil exception because mongrel is doing some funky 
stuff.  Fist I added this to mogrel-1.1.2/lib/mongrel.rb to figure out 
what the problem was:

       rescue URIClassifier::RegistrationError
         handlers = @classifier.resolve(uri)[2]
         method_name = in_front ? 'unshift' : 'push'
         # BOB_HACK: Method assumes exception means something about 		
	# handlers already existing and tries to push this one, but it
	# could be something else this isn't a good solution but it
	# works for me.
	if handlers.respond_to?method_name
   	  handlers.send(method_name, handler)
	else
   	  raise $!
	end
         # END BOB_HACK
       end



I have worked around this by commenting out the check for '/' at the 
start of the uri(probably a really bad idea) in 
mongrel-1.1.2/lib/uri_classifier.rb (line 31) :


     # Register a handler object at a particular URI. The handler can be 
whatever
     # you want, including an array. It's up to you what to do with it.
     #
     # Registering a handler is not necessarily threadsafe, so be 
careful if you go
     # mucking around once the server is running.
     def register(uri, handler)
       raise RegistrationError, "#{uri.inspect} is already registered" 
if @handler_map[uri]
       raise RegistrationError, "URI is empty" if !uri or uri.empty?
       # here is my change:
       #raise RegistrationError, "URI must begin with a 
\"#{Const::SLASH}\"" unless uri[0..0] == Const::SLASH
       @handler_map[uri.dup] = handler
       rebuild
     end

Ok.  So now mouseHole starts up.  Yippy!  My next problem is this: On 
the app page, there is an enable checkbox, but no submit button.  Are 
all apps automatically enabled?  What's up with that?  The checkbox does 
diddly squat.  Here is my dump of the mousehole_apps table:

BEGIN TRANSACTION;
CREATE TABLE mousehole_apps ("id" INTEGER PRIMARY KEY NOT NULL, "script" 
varchar(255) DEFAULT NULL, "uri" varchar(255) DEFAULT NULL, "active" 
integer DEFAULT 1 NOT NULL, "matches" text DEFAULT NULL, "created_at" 
datetime DEFAULT NULL);
INSERT INTO "mousehole_apps" 
VALUES(2,'hoodwinkd.rb','NULL',1,NULL,'2007-12-21 09:48:02');
INSERT INTO "mousehole_apps" 
VALUES(3,'rcorsaro.rb','NULL',1,NULL,'2007-12-21 09:48:02');
COMMIT;

rcorsaro.rb is my test script.  It's located in ~/.mouseHole/.  Here it is:

# Blah Blah mousehole
# by Robert Corsaro
# <http://localhost/my.user.rb
class RCorsaro < MouseHole::App
   title "RCorsaro"
   namespace "http://what.dyndns.org/"
   description "add an h1 to a page"
   version 1.0
   + url("http://localhost/*")

   def rewrite(page)
     puts 'hello'
     (page/'body').append("<h1>Hi There!</h1>")
   end
end

See anything wrong?

I have next week off, so I can work on mouseHole if it needs working on. 
  Does anyone give a shit?



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