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##
## wml::imp::generic - Generic Import Of External Resources
## Copyright (c) 1997-2001 Ralf S. Engelschall, All Rights Reserved.
##
# The <preserve>/<restore> tags with multiple arguments require WML 2.0.3
#use wml::mod::version
<require 2.0.3 />
#use wml::std::tags
#use wml::fmt::verbatim
#use wml::fmt::text
#use wml::fmt::pod
#use wml::fmt::sdf
<protect pass=2>
<:
#
# determine a way to retrieve the data
#
sub existsprg {
my ($prg) = @_;
my ($found, $p);
$found = 0;
foreach $p (split(/:/, $ENV{'PATH'})) {
$found = 1 if (-x "$p/$prg");
}
return $found;
}
eval 'use LWP::Simple;';
if (not $@) {
eval 'sub remote_fetch { my($url) = @_; return LWP::Simple::get($url); }'
}
elsif (&existsprg("lynx")) {
eval 'sub remote_fetch { my($url) = @_; return `lynx -source $url`; }'
}
elsif (&existsprg("wget")) {
eval 'sub remote_fetch { my($url) = @_; return `cd $(WML_TMPDIR) && mkdir wget.$$ && cd wget.$$ && wget -q -o/dev/null $url && cat * && cd $(WML_TMPDIR) && rm -f wget.$$`; }'
}
elsif (&existsprg("fetch")) {
eval 'sub remote_fetch { my($url) = @_; return `fetch $url`; }'
}
else {
eval 'sub remote_fetch { my($url) = @_;
return "Failed to retrieve $url" .
"None of {LWP::Simple::get,Lynx,Wget,Fetch} were found"; }'
}
sub local_fetch {
my ($file) = @_;
my ($buf);
local (*FP);
open(FP, "<$file") || die;
local ($/) = undef;
$buf = <FP>;
close(FP);
return $buf;
}
:>
</protect>
<define-tag import>
<preserve src format eperlfilter />
<set-var %attributes />
<perl>
{
my $format = '<get-var format />';
my $src = '<get-var src />';
my $eperlfilter = '<get-var eperlfilter />';
if ($format eq '') {
$format = 'verbatim';
$format = 'pod' if ($src =~ m|\.pod$|);
$format = 'sdf' if ($src =~ m|\.sdf$|);
$format = 'text' if ($src =~ m|\.txt$|);
}
my $buf;
if ($src =~ m|^http://| or $src =~ m|^ftp://|) {
$buf = &remote_fetch($src);
}
else {
$buf = &local_fetch($src);
}
my $tmpfile = "$(WML_TMPDIR)/wml.import.$$.tmp";
local (*TMP);
open(TMP, ">$tmpfile");
print TMP $buf;
close(TMP);
if ($format eq 'verbatim') {
$buf = &wml_fmt_verbatim({ FILE => $tmpfile });
}
elsif ($format eq 'pod') {
$buf = &wml_fmt_pod({ FILE => $tmpfile,
KEEPINDEX => 1,
EPERLFILTER => $eperlfilter });
}
elsif ($format eq 'sdf') {
$buf = &wml_fmt_pod({ FILE => $tmpfile });
}
elsif ($format eq 'text') {
$buf = &wml_fmt_text({ FILE => $tmpfile });
}
unlink($tmpfile);
<perl:print: $buf />
}
</perl>
<restore src format eperlfilter />
</define-tag>
##EOF##
__END__
=head1 NAME
wml::imp::generic - Generic Import Of External Resources
=head1 SYNOPSIS
#use wml::imp::generic
<import src="url" [format="..."]>
=head1 DESCRIPTION
This tag imports an external resource via URL or filename. The
C<E<lt>importE<gt>> tag gets replaced by the contents of the external resource
formatted via the C<verbatim>, C<pod>, C<sdf> or C<text> formatting filters.
Remote retrival only works if at least one of the following programs can be
found:
- Perl function: LWP::Simple::get()
- Program: lynx
- Program: wget
- Program: fetch
=head1 AUTHOR
Ralf S. Engelschall
rse@engelschall.com
www.engelschall.com
=head1 REQUIRES
Internal: P1, P2, P3
External: LWP::Simple::get (P5M) | lynx (PATH) | wget (PATH) | fetch (PATH)
=head1 SEE ALSO
LWP::Simple(3), lynx(1), wget(1), fetch(1)
=cut
|
