Josef 'Jupp' Schugt
11/28/2003 11:56:00 PM
* T. Onoma; 2003-11-28, 20:42 UTC:
> On Friday 28 November 2003 06:48 pm, Gavri Savio Fernandez wrote:
> > i'm writing an application which needs to parse a configuration
> > file on program startup. is there a prefered format for
> > configuration files in ruby? is there a library for such a
> > purpose? i suppose i could do the parsing myself, but i was just
> > wondering if there is a sophisticated way out there.
>
> I would consider Yaml.
There are at least four ways:
- INI
- Ruby
- XML
- Yaml
INI files are very simple but also limited.
; .qvwm-theme
[Variables]
DefaultIcon = "def16.ani" ; titlebar/taskbar-button icon
DefaultLargeIcon = "def32.ani" ; task switcher icon
DefaultShortcutIcon = "icon32.ani" ; shortcut icon
DefaultFont = "-*-*-medium-r-normal-*-14-*-*-*-*-*-*-*"
YAML has already been mentioned.
In the case of XML at least one libary exists that focusses on
configuration files.
Personally I prefer Ruby files to use other Ruby files as their
configuration files. To give an example of a config file:
Conf = {
'stars' => true,
'host' => 'localhost',
'port' => 110,
'user' => 'jupp',
'pass' => '74!GeD,5',
'apop' => false,
'filter' => '/home/jupp/.popclient-filter.rb',
'charset' => 'ISO-8859-15',
'statistics' => true,
'confirmation'=> false,
'deliver' => true,
'filerules' => '/home/jupp/.popclient-filerules.rb',
'logfile' => '/home/jupp/popclient-log',
}
Actually in use, I only did change value of Conf['pass']. Parsing is
then done in this way:
def initialize(rcfile)
rcfile = Default_rcfile if rcfile.nil?
@rcfile = rcfile
return unless file_okay?(rcfile, true)
begin
eval File.new(rcfile).read
rescue ScriptError=>e
warn("An error occurred while reading #{rcfile}: ", e)
else
@stars = Conf['stars']
@apop = Conf['apop']
@host = Conf['host']
@user = Conf['user']
@pass = Conf['pass']
@filter = Conf['filter']
@log = Conf['logfile']
@charset = Conf['charset']
@statistics = Conf['statistics']
@confirmation = Conf['confirmation']
@deliver = Conf['deliver']
@filerules = Conf['filerules']
unless Conf['port'].nil?
port = Conf['port']
if port < 0 or port > 65535
warn("Invalid port in '#{rcfile}', ignored")
else
@port = port
end
end
end
end
file_okay? does access right checking and e.g. complains about world
or group readable configuration files (which is not a good idea if
the file may contain a valuable password).
Josef 'Jupp' Schugt
--
begin SPAM-POLICY.txt.vbs
if msg.size > 100 kB or msg.sender.is_spammer or msg.text.is_spam
discard message
end