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=head1 NAME |
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|
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AnyEvent::FCP - freenet client protocol 2.0 |
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|
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=head1 SYNOPSIS |
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|
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use AnyEvent::FCP; |
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|
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my $fcp = new AnyEvent::FCP; |
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|
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# transactions return condvars |
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my $lp_cv = $fcp->list_peers; |
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my $pr_cv = $fcp->list_persistent_requests; |
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|
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my $peers = $lp_cv->recv; |
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my $reqs = $pr_cv->recv; |
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|
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=head1 DESCRIPTION |
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|
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This module implements the freenet client protocol version 2.0, as used by |
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freenet 0.7. See L<Net::FCP> for the earlier freenet 0.5 version. |
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|
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See L<http://wiki.freenetproject.org/FreenetFCPSpec2Point0> for a |
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description of what the messages do. |
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|
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The module uses L<AnyEvent> to find a suitable event module. |
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|
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Only very little is implemented, ask if you need more, and look at the |
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example program later in this section. |
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|
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=head2 IMPORT TAGS |
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|
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Nothing much can be "imported" from this module right now. |
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|
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=head2 THE AnyEvent::FCP CLASS |
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|
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=over 4 |
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|
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=cut |
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|
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package AnyEvent::FCP; |
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|
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use common::sense; |
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|
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use Carp; |
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|
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our $VERSION = '0.2'; |
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|
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use Scalar::Util (); |
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|
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use AnyEvent; |
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use AnyEvent::Handle; |
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|
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sub touc($) { |
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local $_ = shift; |
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1 while s/((?:^|_)(?:svk|chk|uri|fcp)(?:_|$))/\U$1/; |
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s/(?:^|_)(.)/\U$1/g; |
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$_ |
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} |
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|
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sub tolc($) { |
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local $_ = shift; |
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1 while s/(SVK|CHK|URI|FCP)([^_])/$1\_$2/i; |
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1 while s/([^_])(SVK|CHK|URI|FCP)/$1\_$2/i; |
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s/(?<=[a-z])(?=[A-Z])/_/g; |
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lc |
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} |
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|
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=item $fcp = new AnyEvent::FCP [host => $host][, port => $port][, progress => \&cb][, name => $name] |
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|
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Create a new FCP connection to the given host and port (default |
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127.0.0.1:9481, or the environment variables C<FREDHOST> and C<FREDPORT>). |
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|
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If no C<name> was specified, then AnyEvent::FCP will generate a |
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(hopefully) unique client name for you. |
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|
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=cut |
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|
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#TODO |
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#You can install a progress callback that is being called with the AnyEvent::FCP |
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#object, a txn object, the type of the transaction and the attributes. Use |
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#it like this: |
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# |
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# sub progress_cb { |
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# my ($self, $txn, $type, $attr) = @_; |
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# |
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# warn "progress<$txn,$type," . (join ":", %$attr) . ">\n"; |
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# } |
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|
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sub new { |
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my $class = shift; |
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my $self = bless { @_ }, $class; |
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|
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$self->{host} ||= $ENV{FREDHOST} || "127.0.0.1"; |
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$self->{port} ||= $ENV{FREDPORT} || 9481; |
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$self->{name} ||= time.rand.rand.rand; # lame |
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$self->{timeout} ||= 600; |
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|
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$self->{id} = "a0"; |
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|
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{ |
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Scalar::Util::weaken (my $self = $self); |
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|
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$self->{hdl} = new AnyEvent::Handle |
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connect => [$self->{host} => $self->{port}], |
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timeout => $self->{timeout}, |
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on_error => sub { |
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warn "<@_>\n"; |
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exit 1; |
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}, |
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on_read => sub { $self->on_read (@_) }, |
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on_eof => $self->{on_eof} || sub { }; |
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|
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Scalar::Util::weaken ($self->{hdl}{fcp} = $self); |
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} |
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|
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$self->send_msg ( |
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client_hello => |
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name => $self->{name}, |
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expected_version => "2.0", |
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); |
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|
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$self |
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} |
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|
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#sub progress { |
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# my ($self, $txn, $type, $attr) = @_; |
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# |
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# $self->{progress}->($self, $txn, $type, $attr) |
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# if $self->{progress}; |
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#} |
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|
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sub send_msg { |
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my ($self, $type, %kv) = @_; |
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|
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my $data = delete $kv{data}; |
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|
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if (exists $kv{id_cb}) { |
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my $id = $kv{identifier} || ++$self->{id}; |
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$self->{id}{$id} = delete $kv{id_cb}; |
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$kv{identifier} = $id; |
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} |
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|
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my $msg = (touc $type) . "\012" |
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. join "", map +(touc $_) . "=$kv{$_}\012", keys %kv; |
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|
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sub id { |
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my ($self) = @_; |
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|
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|
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} |
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|
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if (defined $data) { |
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$msg .= "DataLength=" . (length $data) . "\012" |
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. "Data\012$data"; |
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} else { |
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$msg .= "EndMessage\012"; |
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} |
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|
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$self->{hdl}->push_write ($msg); |
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} |
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|
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sub on_read { |
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my ($self) = @_; |
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|
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my $type; |
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my %kv; |
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my $rdata; |
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|
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my $done_cb = sub { |
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$kv{pkt_type} = $type; |
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|
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if (my $cb = $self->{queue}[0]) { |
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$cb->($self, $type, \%kv, $rdata) |
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and shift @{ $self->{queue} }; |
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} else { |
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$self->default_recv ($type, \%kv, $rdata); |
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} |
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}; |
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|
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my $hdr_cb; $hdr_cb = sub { |
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if ($_[1] =~ /^([^=]+)=(.*)$/) { |
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my ($k, $v) = ($1, $2); |
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my @k = split /\./, tolc $k; |
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my $ro = \\%kv; |
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|
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while (@k) { |
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my $k = shift @k; |
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if ($k =~ /^\d+$/) { |
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$ro = \$$ro->[$k]; |
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} else { |
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$ro = \$$ro->{$k}; |
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} |
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} |
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|
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$$ro = $v; |
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|
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$_[0]->push_read (line => $hdr_cb); |
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} elsif ($_[1] eq "Data") { |
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$_[0]->push_read (chunk => delete $kv{data_length}, sub { |
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$rdata = \$_[1]; |
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$done_cb->(); |
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}); |
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} elsif ($_[1] eq "EndMessage") { |
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$done_cb->(); |
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} else { |
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die "protocol error, expected message end, got $_[1]\n";#d# |
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} |
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}; |
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|
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$self->{hdl}->push_read (line => sub { |
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$type = tolc $_[1]; |
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$_[0]->push_read (line => $hdr_cb); |
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}); |
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} |
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|
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sub default_recv { |
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my ($self, $type, $kv, $rdata) = @_; |
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|
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if ($type eq "node_hello") { |
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$self->{node_hello} = $kv; |
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} elsif (exists $self->{id}{$kv->{identifier}}) { |
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$self->{id}{$kv->{identifier}}($self, $type, $kv, $rdata) |
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and delete $self->{id}{$kv->{identifier}}; |
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} else { |
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# on_warn |
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#warn "protocol warning (unexpected $type message)\n"; |
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} |
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} |
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|
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sub _txn { |
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my ($name, $sub) = @_; |
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|
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*{$name} = sub { |
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splice @_, 1, 0, (my $cv = AnyEvent->condvar); |
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&$sub; |
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$cv |
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}; |
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|
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*{"$name\_sync"} = sub { |
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splice @_, 1, 0, (my $cv = AnyEvent->condvar); |
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&$sub; |
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$cv->recv |
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}; |
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} |
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|
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=item $cv = $fcp->list_peers ([$with_metdata[, $with_volatile]]) |
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|
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=item $peers = $fcp->list_peers_sync ([$with_metdata[, $with_volatile]]) |
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|
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=cut |
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|
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_txn list_peers => sub { |
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my ($self, $cv, $with_metadata, $with_volatile) = @_; |
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|
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my @res; |
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|
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$self->send_msg (list_peers => |
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with_metadata => $with_metadata ? "true" : "false", |
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with_volatile => $with_volatile ? "true" : "false", |
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id_cb => sub { |
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my ($self, $type, $kv, $rdata) = @_; |
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|
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if ($type eq "end_list_peers") { |
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$cv->(\@res); |
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1 |
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} else { |
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push @res, $kv; |
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0 |
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} |
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}, |
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); |
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}; |
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|
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=item $cv = $fcp->list_peer_notes ($node_identifier) |
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|
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=item $notes = $fcp->list_peer_notes_sync ($node_identifier) |
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|
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=cut |
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|
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_txn list_peer_notes => sub { |
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my ($self, $cv, $node_identifier) = @_; |
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|
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$self->send_msg (list_peer_notes => |
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node_identifier => $node_identifier, |
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id_cb => sub { |
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my ($self, $type, $kv, $rdata) = @_; |
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|
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$cv->($kv); |
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1 |
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}, |
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); |
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}; |
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|
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=item $cv = $fcp->watch_global ($enabled[, $verbosity_mask]) |
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|
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=item $fcp->watch_global_sync ($enabled[, $verbosity_mask]) |
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|
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=cut |
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|
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_txn watch_global => sub { |
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my ($self, $cv, $enabled, $verbosity_mask) = @_; |
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|
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$self->send_msg (watch_global => |
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enabled => $enabled ? "true" : "false", |
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defined $verbosity_mask ? (verbosity_mask => $verbosity_mask+0) : (), |
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); |
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|
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$cv->(); |
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}; |
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|
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=item $cv = $fcp->list_persistent_requests |
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|
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=item $reqs = $fcp->list_persistent_requests_sync |
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|
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=cut |
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|
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_txn list_persistent_requests => sub { |
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my ($self, $cv) = @_; |
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|
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my %res; |
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|
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$self->send_msg ("list_persistent_requests"); |
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|
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push @{ $self->{queue} }, sub { |
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my ($self, $type, $kv, $rdata) = @_; |
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|
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if ($type eq "end_list_persistent_requests") { |
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$cv->(\%res); |
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1 |
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} else { |
| 332 |
my $id = $kv->{identifier}; |
| 333 |
|
| 334 |
if ($type =~ /^persistent_(get|put|put_dir)$/) { |
| 335 |
$res{$id} = { |
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type => $1, |
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%{ $res{$id} }, |
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%$kv, |
| 339 |
}; |
| 340 |
} elsif ($type eq "simple_progress") { |
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delete $kv->{pkt_type}; # save memory |
| 342 |
push @{ $res{delete $kv->{identifier}}{simple_progress} }, $kv; |
| 343 |
} else { |
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$res{delete $kv->{identifier}}{delete $kv->{pkt_type}} = $kv; |
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} |
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0 |
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} |
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}; |
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}; |
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|
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=item $cv = $fcp->remove_request ($global, $identifier) |
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|
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=item $status = $fcp->remove_request_sync ($global, $identifier) |
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|
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=cut |
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|
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_txn remove_request => sub { |
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my ($self, $cv, $global, $identifier) = @_; |
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|
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$self->send_msg (remove_request => |
| 361 |
global => $global ? "true" : "false", |
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identifier => $identifier, |
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id_cb => sub { |
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my ($self, $type, $kv, $rdata) = @_; |
| 365 |
|
| 366 |
$cv->($kv); |
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1 |
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}, |
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); |
| 370 |
|
| 371 |
$cv->(); |
| 372 |
}; |
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|
| 374 |
=item $cv = $fcp->modify_persistent_request ($global, $identifier[, $client_token[, $priority_class]]) |
| 375 |
|
| 376 |
=item $status = $fcp->modify_persistent_request_sync ($global, $identifier[, $client_token[, $priority_class]]) |
| 377 |
|
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=cut |
| 379 |
|
| 380 |
_txn modify_persistent_request => sub { |
| 381 |
my ($self, $cv, $global, $identifier, $client_token, $priority_class) = @_; |
| 382 |
|
| 383 |
$self->send_msg (modify_persistent_request => |
| 384 |
global => $global ? "true" : "false", |
| 385 |
identifier => $identifier, |
| 386 |
defined $client_token ? (client_token => $client_token ) : (), |
| 387 |
defined $priority_class ? (priority_class => $priority_class) : (), |
| 388 |
id_cb => sub { |
| 389 |
my ($self, $type, $kv, $rdata) = @_; |
| 390 |
|
| 391 |
$cv->($kv); |
| 392 |
1 |
| 393 |
}, |
| 394 |
); |
| 395 |
|
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$cv->(); |
| 397 |
}; |
| 398 |
|
| 399 |
=item $cv = $fcp->get_plugin_info ($name, $detailed) |
| 400 |
|
| 401 |
=item $info = $fcp->get_plugin_info_sync ($name, $detailed) |
| 402 |
|
| 403 |
=cut |
| 404 |
|
| 405 |
_txn get_plugin_info => sub { |
| 406 |
my ($self, $cv, $name, $detailed) = @_; |
| 407 |
|
| 408 |
$self->send_msg (get_plugin_info => |
| 409 |
plugin_name => $name, |
| 410 |
detailed => $detailed ? "true" : "false", |
| 411 |
id_cb => sub { |
| 412 |
my ($self, $type, $kv, $rdata) = @_; |
| 413 |
|
| 414 |
$cv->($kv); |
| 415 |
1 |
| 416 |
}, |
| 417 |
); |
| 418 |
|
| 419 |
$cv->(); |
| 420 |
}; |
| 421 |
|
| 422 |
=back |
| 423 |
|
| 424 |
=head1 EXAMPLE PROGRAM |
| 425 |
|
| 426 |
use AnyEvent::FCP; |
| 427 |
|
| 428 |
my $fcp = new AnyEvent::FCP; |
| 429 |
|
| 430 |
# let us look at the global request list |
| 431 |
$fcp->watch_global (1, 0); |
| 432 |
|
| 433 |
# list them, synchronously |
| 434 |
my $req = $fcp->list_persistent_requests_sync; |
| 435 |
|
| 436 |
# go through all requests |
| 437 |
for my $req (values %$req) { |
| 438 |
# skip jobs not directly-to-disk |
| 439 |
next unless $req->{return_type} eq "disk"; |
| 440 |
# skip jobs not issued by FProxy |
| 441 |
next unless $req->{identifier} =~ /^FProxy:/; |
| 442 |
|
| 443 |
if ($req->{data_found}) { |
| 444 |
# file has been successfully downloaded |
| 445 |
|
| 446 |
... move the file away |
| 447 |
(left as exercise) |
| 448 |
|
| 449 |
# remove the request |
| 450 |
|
| 451 |
$fcp->remove_request (1, $req->{identifier}); |
| 452 |
} elsif ($req->{get_failed}) { |
| 453 |
# request has failed |
| 454 |
if ($req->{get_failed}{code} == 11) { |
| 455 |
# too many path components, should restart |
| 456 |
} else { |
| 457 |
# other failure |
| 458 |
} |
| 459 |
} else { |
| 460 |
# modify priorities randomly, to improve download rates |
| 461 |
$fcp->modify_persistent_request (1, $req->{identifier}, undef, int 6 - 5 * (rand) ** 1.7) |
| 462 |
if 0.1 > rand; |
| 463 |
} |
| 464 |
} |
| 465 |
|
| 466 |
# see if the dummy plugin is loaded, to ensure all previous requests have finished. |
| 467 |
$fcp->get_plugin_info_sync ("dummy"); |
| 468 |
|
| 469 |
=head1 SEE ALSO |
| 470 |
|
| 471 |
L<http://wiki.freenetproject.org/FreenetFCPSpec2Point0>, L<Net::FCP>. |
| 472 |
|
| 473 |
=head1 BUGS |
| 474 |
|
| 475 |
=head1 AUTHOR |
| 476 |
|
| 477 |
Marc Lehmann <schmorp@schmorp.de> |
| 478 |
http://home.schmorp.de/ |
| 479 |
|
| 480 |
=cut |
| 481 |
|
| 482 |
1 |
| 483 |
|
