From: Ross Bamford <rossrt@...>
Date: 2006-05-08T03:56:24+09:00
Subject: Re: REXML exception rescuing

On Mon, 2006-05-08 at 03:21 +0900, Eli Bendersky wrote:
> Hi all,
> 
> I use the following to parse an XML file with REXML:
> 
> begin
> 	doc = REXML::Document.new File.new('test_cfg.xml')
> rescue REXML::ParseException => msg
> 	puts "Failed: #{msg}"
> end
> 
> When REXML throws ParseException, a whole load information is spilled 
> into msg. Although this is useful for debugging, it hardly is an option 
> for a "real-life" application that just has to notify the user of an 
> error in his .xml file in the friendliest way possible.
> 
> How can I get just the "malformed XML: missing tag start" part (plus the 
> line in the file) without all the stack trace and the information that 
> comes after it, which for some reason is repeated twice. Is this 
> possible without deconstructing the raised msg ?

This is probably a bit naive but maybe will be a start:

begin
  doc = REXML::Document.new File.new('bad.xml')
rescue REXML::ParseException => ex
  puts "Failed: #{ex.message[/^.*$/]} (#{ex.message[/Line:\s\d+/]})"
end

-- 
Ross Bamford - rosco@roscopeco.REMOVE.co.uk