Viewing file:  LWPExternEnt.pl (1.54 KB) -r--r--r--
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# LWPExternEnt.pl
#
# Copyright (c) 2000 Clark Cooper
# All rights reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
package XML::Parser;
use URI;
use URI::file;
use LWP::UserAgent;
##
## Note that this external entity handler reads the entire entity into
## memory, so it will choke on huge ones. It would be really nice if
## LWP::UserAgent optionally returned us an IO::Handle.
##
sub lwp_ext_ent_handler {
my ($xp, $base, $sys) = @_; # We don't use public id
my $uri;
if (defined $base) {
# Base may have been set by parsefile, which is agnostic about
# whether its a file or URI.
my $base_uri = new URI($base);
unless (defined $base_uri->scheme) {
$base_uri = URI->new_abs($base_uri, URI::file->cwd);
}
$uri = URI->new_abs($sys, $base_uri);
}
else {
$uri = new URI($sys);
unless (defined $uri->scheme) {
$uri = URI->new_abs($uri, URI::file->cwd);
}
}
my $ua = $xp->{_lwpagent};
unless (defined $ua) {
$ua = $xp->{_lwpagent} = new LWP::UserAgent();
$ua->env_proxy();
}
my $req = new HTTP::Request('GET', $uri);
my $res = $ua->request($req);
if ($res->is_error) {
$xp->{ErrorMessage} .= "\n" . $res->status_line . " $uri";
return undef;
}
$xp->{_BaseStack} ||= [];
push(@{$xp->{_BaseStack}}, $base);
$xp->base($uri);
return $res->content;
} # End lwp_ext_ent_handler
sub lwp_ext_ent_cleanup {
my ($xp) = @_;
$xp->base(pop(@{$xp->{_BaseStack}}));
} # End lwp_ext_ent_cleanup
1;
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