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1 # LWPExternEnt.pl 2 # 3 # Copyright (c) 2000 Clark Cooper 4 # All rights reserved. 5 # 6 # This program is free software; you can redistribute it and/or 7 # modify it under the same terms as Perl itself. 8 9 package XML::Parser; 10 11 use URI; 12 use URI::file; 13 use LWP; 14 15 ## 16 ## Note that this external entity handler reads the entire entity into 17 ## memory, so it will choke on huge ones. It would be really nice if 18 ## LWP::UserAgent optionally returned us an IO::Handle. 19 ## 20 21 sub lwp_ext_ent_handler { 22 my ($xp, $base, $sys) = @_; # We don't use public id 23 24 my $uri; 25 26 if (defined $base) { 27 # Base may have been set by parsefile, which is agnostic about 28 # whether its a file or URI. 29 my $base_uri = new URI($base); 30 unless (defined $base_uri->scheme) { 31 $base_uri = URI->new_abs($base_uri, URI::file->cwd); 32 } 33 34 $uri = URI->new_abs($sys, $base_uri); 35 } 36 else { 37 $uri = new URI($sys); 38 unless (defined $uri->scheme) { 39 $uri = URI->new_abs($uri, URI::file->cwd); 40 } 41 } 42 43 my $ua = $xp->{_lwpagent}; 44 unless (defined $ua) { 45 $ua = $xp->{_lwpagent} = new LWP::UserAgent(); 46 $ua->env_proxy(); 47 } 48 49 my $req = new HTTP::Request('GET', $uri); 50 51 my $res = $ua->request($req); 52 if ($res->is_error) { 53 $xp->{ErrorMessage} .= "\n" . $res->status_line . " $uri"; 54 return undef; 55 } 56 57 $xp->{_BaseStack} ||= []; 58 push(@{$xp->{_BaseStack}}, $base); 59 60 $xp->base($uri); 61 62 return $res->content; 63 } # End lwp_ext_ent_handler 64 65 sub lwp_ext_ent_cleanup { 66 my ($xp) = @_; 67 68 $xp->base(pop(@{$xp->{_BaseStack}})); 69 } # End lwp_ext_ent_cleanup 70 71 1;
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