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-rw-r--r--Master/tlpkg/tlperl/lib/LWP/Protocol/nntp.pm145
1 files changed, 145 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/LWP/Protocol/nntp.pm b/Master/tlpkg/tlperl/lib/LWP/Protocol/nntp.pm
new file mode 100644
index 00000000000..788477d488a
--- /dev/null
+++ b/Master/tlpkg/tlperl/lib/LWP/Protocol/nntp.pm
@@ -0,0 +1,145 @@
+package LWP::Protocol::nntp;
+
+# Implementation of the Network News Transfer Protocol (RFC 977)
+
+require LWP::Protocol;
+@ISA = qw(LWP::Protocol);
+
+require HTTP::Response;
+require HTTP::Status;
+require Net::NNTP;
+
+use strict;
+
+
+sub request
+{
+ my($self, $request, $proxy, $arg, $size, $timeout) = @_;
+
+ $size = 4096 unless $size;
+
+ # Check for proxy
+ if (defined $proxy) {
+ return HTTP::Response->new(&HTTP::Status::RC_BAD_REQUEST,
+ 'You can not proxy through NNTP');
+ }
+
+ # Check that the scheme is as expected
+ my $url = $request->uri;
+ my $scheme = $url->scheme;
+ unless ($scheme eq 'news' || $scheme eq 'nntp') {
+ return HTTP::Response->new(&HTTP::Status::RC_INTERNAL_SERVER_ERROR,
+ "LWP::Protocol::nntp::request called for '$scheme'");
+ }
+
+ # check for a valid method
+ my $method = $request->method;
+ unless ($method eq 'GET' || $method eq 'HEAD' || $method eq 'POST') {
+ return HTTP::Response->new(&HTTP::Status::RC_BAD_REQUEST,
+ 'Library does not allow method ' .
+ "$method for '$scheme:' URLs");
+ }
+
+ # extract the identifier and check against posting to an article
+ my $groupart = $url->_group;
+ my $is_art = $groupart =~ /@/;
+
+ if ($is_art && $method eq 'POST') {
+ return HTTP::Response->new(&HTTP::Status::RC_BAD_REQUEST,
+ "Can't post to an article <$groupart>");
+ }
+
+ my $nntp = Net::NNTP->new($url->host,
+ #Port => 18574,
+ Timeout => $timeout,
+ #Debug => 1,
+ );
+ die "Can't connect to nntp server" unless $nntp;
+
+ # Check the initial welcome message from the NNTP server
+ if ($nntp->status != 2) {
+ return HTTP::Response->new(&HTTP::Status::RC_SERVICE_UNAVAILABLE,
+ $nntp->message);
+ }
+ my $response = HTTP::Response->new(&HTTP::Status::RC_OK, "OK");
+
+ my $mess = $nntp->message;
+
+ # Try to extract server name from greeting message.
+ # Don't know if this works well for a large class of servers, but
+ # this works for our server.
+ $mess =~ s/\s+ready\b.*//;
+ $mess =~ s/^\S+\s+//;
+ $response->header(Server => $mess);
+
+ # First we handle posting of articles
+ if ($method eq 'POST') {
+ $nntp->quit; $nntp = undef;
+ $response->code(&HTTP::Status::RC_NOT_IMPLEMENTED);
+ $response->message("POST not implemented yet");
+ return $response;
+ }
+
+ # The method must be "GET" or "HEAD" by now
+ if (!$is_art) {
+ if (!$nntp->group($groupart)) {
+ $response->code(&HTTP::Status::RC_NOT_FOUND);
+ $response->message($nntp->message);
+ }
+ $nntp->quit; $nntp = undef;
+ # HEAD: just check if the group exists
+ if ($method eq 'GET' && $response->is_success) {
+ $response->code(&HTTP::Status::RC_NOT_IMPLEMENTED);
+ $response->message("GET newsgroup not implemented yet");
+ }
+ return $response;
+ }
+
+ # Send command to server to retrieve an article (or just the headers)
+ my $get = $method eq 'HEAD' ? "head" : "article";
+ my $art = $nntp->$get("<$groupart>");
+ unless ($art) {
+ $nntp->quit; $nntp = undef;
+ $response->code(&HTTP::Status::RC_NOT_FOUND);
+ $response->message($nntp->message);
+ return $response;
+ }
+
+ # Parse headers
+ my($key, $val);
+ local $_;
+ while ($_ = shift @$art) {
+ if (/^\s+$/) {
+ last; # end of headers
+ }
+ elsif (/^(\S+):\s*(.*)/) {
+ $response->push_header($key, $val) if $key;
+ ($key, $val) = ($1, $2);
+ }
+ elsif (/^\s+(.*)/) {
+ next unless $key;
+ $val .= $1;
+ }
+ else {
+ unshift(@$art, $_);
+ last;
+ }
+ }
+ $response->push_header($key, $val) if $key;
+
+ # Ensure that there is a Content-Type header
+ $response->header("Content-Type", "text/plain")
+ unless $response->header("Content-Type");
+
+ # Collect the body
+ $response = $self->collect_once($arg, $response, join("", @$art))
+ if @$art;
+
+ # Say goodbye to the server
+ $nntp->quit;
+ $nntp = undef;
+
+ $response;
+}
+
+1;