From: Xavier Noria <fxn@...>
Date: 2008-03-26T05:02:36+09:00
Subject: Re: Is possible Ruby to use CRLF instead of LF?

On Mar 25, 2008, at 17:50 , Iņaki Baz Castillo wrote:

> Hi, AFAIK Ruby uses LF = \n to detect newline. But now I'm coding a
> parser for a protocol that uses CRLF = \r\n for newline. In fact, \n
> is not considered a newline.
>
> Is it possible to get Ruby working with CRLF instead of LF?
>
> For example, I want to declare this string (for testing):
>
> example =<-- END_STRING
> Version 4
> Request_Type: call
> From: sssss
> END_STRING
>
> and I want that string to match \r\n at the end of each line instead
> of \n, is it possible?

The whole question is a bit generic.

In the source code a hard-newline like the one in a here-document has  
only LFs as long as the file has the newline conventions of the  
runtime platform. That's because the Ruby interpreter itself reads the  
program as a text file in text mode.

If you want to force CRLF in a here-document you can use a trick like  
this (off the top of my head):

   example = <<EOS.lf_to_crlf
     ...
   EOS

   class String
     def lf_to_crlf
       gsub(/\012/, "\015\012")
     end
   end

Then the I/O channel used to send the data needs to be in binary mode,  
etc.

-- fxn