Regexp::Common::URI::gUserrContributed Perl DocuRegexp::Common::URI::gopher(3)NAMERegexp::Common::URI::gopher-- Returns a pattern for gopher URIs.
SYNOPSIS
use Regexp::Common qw /URI/;
while (<>) {
/$RE{URI}{gopher}/ and print "Contains a gopher URI.\n";
}
DESCRIPTION
$RE{URI}{gopher}{-notab}
Gopher URIs are poorly defined. Originally, RFC 1738 defined gopher
URIs, but they were later redefined in an internet draft. One that was
expired in June 1997.
The internet draft for gopher URIs defines them as follows:
"gopher:" "//" host [ ":" port ] "/" gopher-type selector
[ "%09" search [ "%09" gopherplus_string ]]
Unfortunally, a selector is defined in such a way that characters may
be escaped using the URI escape mechanism. This includes tabs, which
escaped are %09. Hence, the syntax cannot distinguish between a URI
that has both a selector and a search part, and an URI where the selec-
tor includes an escaped tab. (The text of the draft forbids tabs to be
present in the selector though).
$RE{URI}{gopher} follows the defined syntax. To disallow escaped tabs
in the selector and search parts, use $RE{URI}{gopher}{-notab}.
There are other differences between the text and the given syntax.
According to the text, selector strings cannot have tabs, linefeeds or
carriage returns in them. The text also allows the entire gopher-path,
(the part after the slash following the hostport) to be empty; if this
is empty the slash may be omitted as well. However, this isn't
reflected in the syntax.
Under "{-keep}", the following are returned:
$1 The entire URI.
$2 The scheme.
$3 The host (name or address).
$4 The port (if any).
$5 The "gopher-path", the part after the / following the host and
port.
$6 The gopher-type.
$7 The selector. (When no "{-notab}" is used, this includes the search
and gopherplus_string, including the separating escaped tabs).
$8 The search, if given. (Only when "{-notab}" is given).
$9 The gopherplus_string, if given. (Only when "{-notab}" is given).
head1 REFERENCES
[RFC 1738]
Berners-Lee, Tim, Masinter, L., McCahill, M.: Uniform Resource
Locators (URL). December 1994.
[RFC 1808]
Fielding, R.: Relative Uniform Resource Locators (URL). June 1995.
[GOPHER URL]
Krishnan, Murali R., Casey, James: "A Gopher URL Format". Expired
Internet draft draft-murali-url-gopher. December 1996.
HISTORY
$Log: gopher.pm,v $
Revision 2.100 2003/02/21 14:40:59 abigail
Gopher URLs
SEE ALSO
Regexp::Common::URI for other supported URIs.
AUTHOR
Damian Conway (damian@conway.org)
MAINTAINANCE
This package is maintained by Abigail (regexp-common@abigail.nl).
BUGS AND IRRITATIONS
Bound to be plenty.
COPYRIGHT
Copyright (c) 2001 - 2003, Damian Conway. All Rights Reserved.
This module is free software. It may be used, redistributed
and/or modified under the terms of the Perl Artistic License
(see http://www.perl.com/perl/misc/Artistic.html)
perl v5.8.8 2003-03-23 Regexp::Common::URI::gopher(3)
