From: BJ Dierkes <wdierkes@5dollarwhitebox.org>
Date: 2007-09-17T08:29:05+09:00
Subject: Mongrel/XMLRPC For Ruby - Max Post Size

Hello List...

Ruby: 1.8.6
Mongrel= 1.0.1


I have created a Ruby XMLRPC server (xmlrpc4r with mongrel) that is  
working great.  Now I am working on posting large files that are  
base64 encoded and am having problems.  The following is a sample of  
how the Mongrel/XMLRPC is setup and a sample handler:

======================================================================
class XMLRPCHandler < Mongrel::HttpHandler
	def initialize()
         	@xmlrpc_server = XMLRPC::BasicServer.new
		[...]
	end
[...]
end

@handler = XMLRPCHandler.new()

@handler.xmlrpc_server.add_handler('file_transfer') do | token,  
source_name, encoded_source, source_md5 |
[...]
end
======================================================================

Note that The code within the handler is un-important... since the  
transfer fails before anything within the block is called.  On the  
client side I have something like:

======================================================================
if(File.exists?(self.source))
	source_name = File.basename(source)
         encoded_source = ''
         data = ''
         File.open(source) do |f|
          	data = f.read
         end
        	source_md5 = Digest::MD5.hexdigest(data)
       	encoded_source = Base64.encode64(data)
else
        	raise ArgumentError, "source file [#{source}] does not exist!"
end

res = @server.call('file_transfer', @session.token,  source_name,  
encoded_source, source_md5)
======================================================================


When performing this call with a small text file, everything works as  
expected, md5sums match... etc.  However, I am trying to transfer RPM  
files...  the smallest of which is around 500K (not that big).  Upon  
attempting to transfer I get the following error:

Sun Sep 16 17:50:52 -0500 2007: ERROR: undefined method `string' for  
#<File:/tmp/mongrel.16916.0>


Like I said, everything works fine for a rather small text file...  I  
then tried with just a simple file created from /dev/zero.  At a size  
of 64K the file transfers fine.  At 128K I again get the error above.

I'm wondering, is there some sort of limit that anyone can explain  
with regards to Mongrel and/or XMLRPC?

Any feedback is much appreciated.

Thank you.



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