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1.1 |
=head1 NAME |
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AnyEvent::FCP - freenet client protocol 2.0 |
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=head1 SYNOPSIS |
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1.3 |
use AnyEvent::FCP; |
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1.1 |
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1.3 |
my $fcp = new AnyEvent::FCP; |
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1.1 |
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1.7 |
# transactions return condvars |
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1.3 |
my $lp_cv = $fcp->list_peers; |
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my $pr_cv = $fcp->list_persistent_requests; |
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my $peers = $lp_cv->recv; |
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my $reqs = $pr_cv->recv; |
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1.1 |
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=head1 DESCRIPTION |
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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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1.3 |
See L<http://wiki.freenetproject.org/FreenetFCPSpec2Point0> for a |
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description of what the messages do. |
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1.1 |
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The module uses L<AnyEvent> to find a suitable event module. |
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1.3 |
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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1.7 |
=head2 EXAMPLE |
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This example fetches the download list and sets the priority of all files |
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with "a" in their name to "emergency": |
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use AnyEvent::FCP; |
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my $fcp = new AnyEvent::FCP; |
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1.11 |
$fcp->watch_global (1, 0); |
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my $req = $fcp->list_persistent_requests; |
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1.7 |
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1.11 |
TODO |
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1.7 |
for my $req (values %$req) { |
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if ($req->{filename} =~ /a/) { |
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1.11 |
$fcp->modify_persistent_request (1, $req->{identifier}, undef, 0); |
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1.7 |
} |
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} |
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1.1 |
=head2 IMPORT TAGS |
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Nothing much can be "imported" from this module right now. |
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1.11 |
=head1 THE AnyEvent::FCP CLASS |
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1.1 |
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=over 4 |
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=cut |
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package AnyEvent::FCP; |
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1.2 |
use common::sense; |
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1.1 |
use Carp; |
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1.21 |
our $VERSION = 0.5; |
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1.1 |
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1.2 |
use Scalar::Util (); |
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1.1 |
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use AnyEvent; |
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1.2 |
use AnyEvent::Handle; |
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1.9 |
use AnyEvent::Util (); |
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1.1 |
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1.16 |
our %TOLC; # tolc cache |
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1.1 |
sub touc($) { |
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local $_ = shift; |
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1.9 |
1 while s/((?:^|_)(?:svk|chk|uri|fcp|ds|mime|dda)(?:_|$))/\U$1/; |
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1.1 |
s/(?:^|_)(.)/\U$1/g; |
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$_ |
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} |
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sub tolc($) { |
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local $_ = shift; |
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1.11 |
1 while s/(SVK|CHK|URI|FCP|DS|MIME|DDA)([^_])/$1\_$2/; |
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1 while s/([^_])(SVK|CHK|URI|FCP|DS|MIME|DDA)/$1\_$2/; |
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1.1 |
s/(?<=[a-z])(?=[A-Z])/_/g; |
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lc |
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} |
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1.20 |
=item $fcp = new AnyEvent::FCP key => value...; |
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1.1 |
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Create a new FCP connection to the given host and port (default |
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1.2 |
127.0.0.1:9481, or the environment variables C<FREDHOST> and C<FREDPORT>). |
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1.1 |
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1.3 |
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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1.20 |
The following keys can be specified (they are all optional): |
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=over 4 |
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=item name => $string |
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A unique name to identify this client. If none is specified, a randomly |
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generated name will be used. |
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=item host => $hostname |
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The hostname or IP address of the freenet node. Default is C<$ENV{FREDHOST}> |
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or C<127.0.0.1>. |
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=item port => $portnumber |
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The port number of the FCP port. Default is C<$ENV{FREDPORT}> or C<9481>. |
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=item timeout => $seconds |
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The timeout, in seconds, after which a connection error is assumed when |
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there is no activity. Default is C<7200>, i.e. two hours. |
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=item keepalive => $seconds |
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The interval, in seconds, at which keepalive messages will be |
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sent. Default is C<540>, i.e. nine minutes. |
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These keepalive messages are useful both to detect that a connection is |
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no longer working and to keep any (home) routers from expiring their |
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masquerading entry. |
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1.21 |
=item on_eof => $callback->($fcp) |
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Invoked when the underlying L<AnyEvent::Handle> signals EOF, currently |
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regardless of whether the EOF was expected or not. |
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1.20 |
=item on_error => $callback->($fcp, $message) |
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Invoked on any (fatal) errors, such as unexpected connection close. The |
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callback receives the FCP object and a textual error message. |
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1.25 |
=item on_failure => $callback->($fcp, $type, $args, $backtrace, $error) |
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1.20 |
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Invoked when an FCP request fails that didn't have a failure callback. See |
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L<FCP REQUESTS> for details. |
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=back |
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1.3 |
=cut |
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1.1 |
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sub new { |
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my $class = shift; |
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1.14 |
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my $rand = join "", map chr 0x21 + rand 94, 1..40; # ~ 262 bits entropy |
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1.11 |
my $self = bless { |
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host => $ENV{FREDHOST} || "127.0.0.1", |
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port => $ENV{FREDPORT} || 9481, |
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timeout => 3600 * 2, |
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1.18 |
keepalive => 9 * 60, |
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1.11 |
name => time.rand.rand.rand, # lame |
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@_, |
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queue => [], |
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req => {}, |
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1.15 |
prefix => "..:aefcpid:$rand:", |
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1.14 |
idseq => "a0", |
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1.11 |
}, $class; |
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1.2 |
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{ |
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Scalar::Util::weaken (my $self = $self); |
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1.18 |
$self->{kw} = AE::timer $self->{keepalive}, $self->{keepalive}, sub { |
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$self->{hdl}->push_write ("\n"); |
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}; |
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1.17 |
our $ENDMESSAGE = qr<\012(EndMessage|Data)\012>; |
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# these are declared here for performance reasons |
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my ($k, $v, $type); |
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my $rdata; |
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my $on_read = sub { |
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my ($hdl) = @_; |
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# we only carve out whole messages here |
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while ($hdl->{rbuf} =~ /\012(EndMessage|Data)\012/) { |
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# remember end marker |
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$rdata = $1 eq "Data" |
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or $1 eq "EndMessage" |
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1.19 |
or return $self->fatal ("protocol error, expected message end, got $1\n"); |
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1.17 |
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my @lines = split /\012/, substr $hdl->{rbuf}, 0, $-[0]; |
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substr $hdl->{rbuf}, 0, $+[0], ""; # remove pkg |
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$type = shift @lines; |
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$type = ($TOLC{$type} ||= tolc $type); |
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my %kv; |
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for (@lines) { |
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($k, $v) = split /=/, $_, 2; |
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$k = ($TOLC{$k} ||= tolc $k); |
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if ($k =~ /\./) { |
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# generic, slow case |
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my @k = split /\./, $k; |
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my $ro = \\%kv; |
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while (@k) { |
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$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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$$ro = $v; |
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next; |
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} |
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# special comon case, for performance only |
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$kv{$k} = $v; |
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} |
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if ($rdata) { |
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$_[0]->push_read (chunk => delete $kv{data_length}, sub { |
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$rdata = \$_[1]; |
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$self->recv ($type, \%kv, $rdata); |
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}); |
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last; # do not tgry to parse more messages |
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} else { |
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$self->recv ($type, \%kv); |
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} |
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} |
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}; |
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1.2 |
$self->{hdl} = new AnyEvent::Handle |
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connect => [$self->{host} => $self->{port}], |
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timeout => $self->{timeout}, |
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1.19 |
on_read => $on_read, |
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1.21 |
on_eof => sub { |
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if ($self->{on_eof}) { |
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$self->{on_eof}($self); |
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} else { |
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$self->fatal ("EOF"); |
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} |
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}, |
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1.2 |
on_error => sub { |
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1.19 |
$self->fatal ($_[2]); |
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1.2 |
}, |
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1.17 |
; |
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1.2 |
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Scalar::Util::weaken ($self->{hdl}{fcp} = $self); |
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} |
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1.11 |
$self->send_msg (client_hello => |
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name => $self->{name}, |
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1.2 |
expected_version => "2.0", |
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); |
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1.1 |
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$self |
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} |
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1.19 |
sub fatal { |
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my ($self, $msg) = @_; |
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$self->{hdl}->shutdown; |
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delete $self->{kw}; |
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if ($self->{on_error}) { |
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1.20 |
$self->{on_error}->($self, $msg); |
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1.19 |
} else { |
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die $msg; |
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} |
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} |
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1.14 |
sub identifier { |
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$_[0]{prefix} . ++$_[0]{idseq} |
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} |
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1.2 |
sub send_msg { |
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my ($self, $type, %kv) = @_; |
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1.1 |
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1.2 |
my $data = delete $kv{data}; |
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1.1 |
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1.2 |
if (exists $kv{id_cb}) { |
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1.14 |
my $id = $kv{identifier} ||= $self->identifier; |
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1.2 |
$self->{id}{$id} = delete $kv{id_cb}; |
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1.1 |
} |
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1.2 |
my $msg = (touc $type) . "\012" |
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. join "", map +(touc $_) . "=$kv{$_}\012", keys %kv; |
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1.1 |
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1.2 |
sub id { |
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my ($self) = @_; |
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1.1 |
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1.2 |
} |
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1.1 |
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if (defined $data) { |
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1.2 |
$msg .= "DataLength=" . (length $data) . "\012" |
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. "Data\012$data"; |
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1.1 |
} else { |
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1.2 |
$msg .= "EndMessage\012"; |
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1.1 |
} |
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1.2 |
$self->{hdl}->push_write ($msg); |
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1.1 |
} |
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1.9 |
sub on { |
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my ($self, $cb) = @_; |
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# cb return undef - message eaten, remove cb |
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# cb return 0 - message eaten |
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# cb return 1 - pass to next |
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push @{ $self->{on} }, $cb; |
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} |
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sub _push_queue { |
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my ($self, $queue) = @_; |
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shift @$queue; |
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$queue->[0]($self, AnyEvent::Util::guard { $self->_push_queue ($queue) }) |
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if @$queue; |
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} |
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# lock so only one $type (arbitrary string) is in flight, |
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# to work around horribly misdesigned protocol. |
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sub serialise { |
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my ($self, $type, $cb) = @_; |
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my $queue = $self->{serialise}{$type} ||= []; |
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push @$queue, $cb; |
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$cb->($self, AnyEvent::Util::guard { $self->_push_queue ($queue) }) |
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unless $#$queue; |
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} |
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1.11 |
# how to merge these types into $self->{persistent} |
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our %PERSISTENT_TYPE = ( |
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persistent_get => sub { %{ $_[1] } = (type => "persistent_get" , %{ $_[2] }) }, |
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persistent_put => sub { %{ $_[1] } = (type => "persistent_put" , %{ $_[2] }) }, |
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persistent_put_dir => sub { %{ $_[1] } = (type => "persistent_put_dir", %{ $_[2] }) }, |
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persistent_request_modified => sub { %{ $_[1] } = (%{ $_[1] }, %{ $_[2] }) }, |
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persistent_request_removed => sub { delete $_[0]{req}{$_[2]{identifier}} }, |
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simple_progress => sub { $_[1]{simple_progress} = $_[2] }, # get/put |
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uri_generated => sub { $_[1]{uri_generated} = $_[2] }, # put |
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generated_metadata => sub { $_[1]{generated_metadata} = $_[2] }, # put |
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started_compression => sub { $_[1]{started_compression} = $_[2] }, # put |
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finished_compression => sub { $_[1]{finished_compression} = $_[2] }, # put |
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put_fetchable => sub { $_[1]{put_fetchable} = $_[2] }, # put |
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put_failed => sub { $_[1]{put_failed} = $_[2] }, # put |
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put_successful => sub { $_[1]{put_successful} = $_[2] }, # put |
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sending_to_network => sub { $_[1]{sending_to_network} = $_[2] }, # get |
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compatibility_mode => sub { $_[1]{compatibility_mode} = $_[2] }, # get |
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expected_hashes => sub { $_[1]{expected_hashes} = $_[2] }, # get |
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expected_mime => sub { $_[1]{expected_mime} = $_[2] }, # get |
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expected_data_length => sub { $_[1]{expected_data_length} = $_[2] }, # get |
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get_failed => sub { $_[1]{get_failed} = $_[2] }, # get |
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data_found => sub { $_[1]{data_found} = $_[2] }, # get |
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enter_finite_cooldown => sub { $_[1]{enter_finite_cooldown} = $_[2] }, # get |
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); |
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sub recv { |
371 |
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my ($self, $type, $kv, @extra) = @_; |
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if (my $cb = $PERSISTENT_TYPE{$type}) { |
374 |
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my $id = $kv->{identifier}; |
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|
|
my $req = $_[0]{req}{$id} ||= {}; |
376 |
|
|
$cb->($self, $req, $kv); |
377 |
root |
1.16 |
$self->recv (request_changed => $kv, $type, @extra); |
378 |
root |
1.11 |
} |
379 |
|
|
|
380 |
|
|
my $on = $self->{on}; |
381 |
|
|
for (0 .. $#$on) { |
382 |
|
|
unless (my $res = $on->[$_]($self, $type, $kv, @extra)) { |
383 |
|
|
splice @$on, $_, 1 unless defined $res; |
384 |
|
|
return; |
385 |
|
|
} |
386 |
|
|
} |
387 |
|
|
|
388 |
|
|
if (my $cb = $self->{queue}[0]) { |
389 |
|
|
$cb->($self, $type, $kv, @extra) |
390 |
|
|
and shift @{ $self->{queue} }; |
391 |
|
|
} else { |
392 |
|
|
$self->default_recv ($type, $kv, @extra); |
393 |
|
|
} |
394 |
|
|
} |
395 |
|
|
|
396 |
root |
1.2 |
sub default_recv { |
397 |
|
|
my ($self, $type, $kv, $rdata) = @_; |
398 |
|
|
|
399 |
|
|
if ($type eq "node_hello") { |
400 |
|
|
$self->{node_hello} = $kv; |
401 |
|
|
} elsif (exists $self->{id}{$kv->{identifier}}) { |
402 |
|
|
$self->{id}{$kv->{identifier}}($self, $type, $kv, $rdata) |
403 |
|
|
and delete $self->{id}{$kv->{identifier}}; |
404 |
root |
1.1 |
} |
405 |
|
|
} |
406 |
|
|
|
407 |
root |
1.12 |
=back |
408 |
|
|
|
409 |
|
|
=head2 FCP REQUESTS |
410 |
|
|
|
411 |
|
|
The following methods implement various requests. Most of them map |
412 |
|
|
directory to the FCP message of the same name. The added benefit of |
413 |
|
|
these over sending requests yourself is that they handle the necessary |
414 |
|
|
serialisation, protocol quirks, and replies. |
415 |
|
|
|
416 |
|
|
All of them exist in two versions, the variant shown in this manpage, and |
417 |
|
|
a variant with an extra C<_> at the end, and an extra C<$cb> argument. The |
418 |
|
|
version as shown is I<synchronous> - it will wait for any replies, and |
419 |
|
|
either return the reply, or croak with an error. The underscore variant |
420 |
|
|
returns immediately and invokes one or more callbacks or condvars later. |
421 |
|
|
|
422 |
|
|
For example, the call |
423 |
|
|
|
424 |
|
|
$info = $fcp->get_plugin_info ($name, $detailed); |
425 |
|
|
|
426 |
|
|
Also comes in this underscore variant: |
427 |
|
|
|
428 |
|
|
$fcp->get_plugin_info_ ($name, $detailed, $cb); |
429 |
|
|
|
430 |
root |
1.22 |
You can think of the underscore as a kind of continuation indicator - the |
431 |
root |
1.12 |
normal function waits and returns with the data, the C<_> indicates that |
432 |
|
|
you pass the continuation yourself, and the continuation will be invoked |
433 |
|
|
with the results. |
434 |
|
|
|
435 |
|
|
This callback/continuation argument (C<$cb>) can come in three forms itself: |
436 |
|
|
|
437 |
|
|
=over 4 |
438 |
|
|
|
439 |
|
|
=item A code reference (or rather anything not matching some other alternative) |
440 |
|
|
|
441 |
|
|
This code reference will be invoked with the result on success. On an |
442 |
root |
1.20 |
error, it will invoke the C<on_failure> callback of the FCP object, or, |
443 |
|
|
if none was defined, will die (in the event loop) with a backtrace of the |
444 |
|
|
call site. |
445 |
root |
1.12 |
|
446 |
|
|
This is a popular choice, but it makes handling errors hard - make sure |
447 |
|
|
you never generate protocol errors! |
448 |
|
|
|
449 |
root |
1.23 |
In the failure case, if an C<on_failure> hook exists, it will be invoked |
450 |
root |
1.25 |
with the FCP object, the request type (the name of the method, an arrayref |
451 |
|
|
containing the arguments from the original request invocation, a (textual) |
452 |
|
|
backtrace as generated by C<Carp::longmess>, and the error object from the |
453 |
|
|
server, in this order, e.g.: |
454 |
root |
1.20 |
|
455 |
|
|
on_failure => sub { |
456 |
root |
1.25 |
my ($fcp, $request_type, $orig_args, $backtrace, $error_object) = @_; |
457 |
root |
1.21 |
|
458 |
|
|
warn "FCP failure ($type), $error_object->{code_description} ($error_object->{extra_description})$backtrace"; |
459 |
|
|
exit 1; |
460 |
root |
1.20 |
}, |
461 |
|
|
|
462 |
root |
1.12 |
=item A condvar (as returned by e.g. C<< AnyEvent->condvar >>) |
463 |
|
|
|
464 |
|
|
When a condvar is passed, it is sent (C<< $cv->send ($results) >>) the |
465 |
|
|
results when the request has finished. Should an error occur, the error |
466 |
|
|
will instead result in C<< $cv->croak ($error) >>. |
467 |
|
|
|
468 |
|
|
This is also a popular choice. |
469 |
|
|
|
470 |
|
|
=item An array with two callbacks C<[$success, $failure]> |
471 |
|
|
|
472 |
|
|
The C<$success> callback will be invoked with the results, while the |
473 |
|
|
C<$failure> callback will be invoked on any errors. |
474 |
|
|
|
475 |
root |
1.20 |
The C<$failure> callback will be invoked with the error object from the |
476 |
|
|
server. |
477 |
|
|
|
478 |
root |
1.12 |
=item C<undef> |
479 |
|
|
|
480 |
|
|
This is the same thing as specifying C<sub { }> as callback, i.e. on |
481 |
root |
1.20 |
success, the results are ignored, while on failure, the C<on_failure> hook |
482 |
|
|
is invoked or the module dies with a backtrace. |
483 |
root |
1.12 |
|
484 |
|
|
This is good for quick scripts, or when you really aren't interested in |
485 |
|
|
the results. |
486 |
|
|
|
487 |
|
|
=back |
488 |
|
|
|
489 |
|
|
=cut |
490 |
|
|
|
491 |
root |
1.11 |
our $NOP_CB = sub { }; |
492 |
|
|
|
493 |
root |
1.2 |
sub _txn { |
494 |
|
|
my ($name, $sub) = @_; |
495 |
root |
1.1 |
|
496 |
root |
1.2 |
*{$name} = sub { |
497 |
root |
1.12 |
my $cv = AE::cv; |
498 |
|
|
|
499 |
root |
1.14 |
splice @_, 1, 0, $cv, sub { $cv->croak ($_[0]{extra_description}) }; |
500 |
root |
1.2 |
&$sub; |
501 |
root |
1.11 |
$cv->recv |
502 |
root |
1.2 |
}; |
503 |
root |
1.1 |
|
504 |
root |
1.11 |
*{"$name\_"} = sub { |
505 |
root |
1.12 |
my ($ok, $err) = pop; |
506 |
|
|
|
507 |
|
|
if (ARRAY:: eq ref $ok) { |
508 |
|
|
($ok, $err) = @$ok; |
509 |
|
|
} elsif (UNIVERSAL::isa $ok, AnyEvent::CondVar::) { |
510 |
root |
1.14 |
$err = sub { $ok->croak ($_[0]{extra_description}) }; |
511 |
root |
1.12 |
} else { |
512 |
root |
1.20 |
my $bt = Carp::longmess "AnyEvent::FCP request $name"; |
513 |
|
|
Scalar::Util::weaken (my $self = $_[0]); |
514 |
|
|
my $args = [@_]; shift @$args; |
515 |
root |
1.12 |
$err = sub { |
516 |
root |
1.20 |
if ($self->{on_failure}) { |
517 |
root |
1.21 |
$self->{on_failure}($self, $name, $args, $bt, $_[0]); |
518 |
root |
1.20 |
} else { |
519 |
|
|
die "$_[0]{code_description} ($_[0]{extra_description})$bt"; |
520 |
|
|
} |
521 |
root |
1.12 |
}; |
522 |
|
|
} |
523 |
|
|
|
524 |
|
|
$ok ||= $NOP_CB; |
525 |
|
|
|
526 |
|
|
splice @_, 1, 0, $ok, $err; |
527 |
root |
1.2 |
&$sub; |
528 |
|
|
}; |
529 |
root |
1.1 |
} |
530 |
|
|
|
531 |
root |
1.12 |
=over 4 |
532 |
|
|
|
533 |
root |
1.11 |
=item $peers = $fcp->list_peers ([$with_metdata[, $with_volatile]]) |
534 |
root |
1.3 |
|
535 |
|
|
=cut |
536 |
|
|
|
537 |
root |
1.2 |
_txn list_peers => sub { |
538 |
root |
1.12 |
my ($self, $ok, undef, $with_metadata, $with_volatile) = @_; |
539 |
root |
1.1 |
|
540 |
root |
1.2 |
my @res; |
541 |
root |
1.1 |
|
542 |
root |
1.2 |
$self->send_msg (list_peers => |
543 |
|
|
with_metadata => $with_metadata ? "true" : "false", |
544 |
|
|
with_volatile => $with_volatile ? "true" : "false", |
545 |
|
|
id_cb => sub { |
546 |
|
|
my ($self, $type, $kv, $rdata) = @_; |
547 |
|
|
|
548 |
|
|
if ($type eq "end_list_peers") { |
549 |
root |
1.12 |
$ok->(\@res); |
550 |
root |
1.2 |
1 |
551 |
|
|
} else { |
552 |
|
|
push @res, $kv; |
553 |
|
|
0 |
554 |
|
|
} |
555 |
|
|
}, |
556 |
|
|
); |
557 |
|
|
}; |
558 |
root |
1.1 |
|
559 |
root |
1.11 |
=item $notes = $fcp->list_peer_notes ($node_identifier) |
560 |
root |
1.3 |
|
561 |
|
|
=cut |
562 |
|
|
|
563 |
root |
1.2 |
_txn list_peer_notes => sub { |
564 |
root |
1.12 |
my ($self, $ok, undef, $node_identifier) = @_; |
565 |
root |
1.1 |
|
566 |
root |
1.2 |
$self->send_msg (list_peer_notes => |
567 |
|
|
node_identifier => $node_identifier, |
568 |
|
|
id_cb => sub { |
569 |
|
|
my ($self, $type, $kv, $rdata) = @_; |
570 |
|
|
|
571 |
root |
1.12 |
$ok->($kv); |
572 |
root |
1.2 |
1 |
573 |
|
|
}, |
574 |
|
|
); |
575 |
|
|
}; |
576 |
root |
1.1 |
|
577 |
root |
1.11 |
=item $fcp->watch_global ($enabled[, $verbosity_mask]) |
578 |
root |
1.3 |
|
579 |
|
|
=cut |
580 |
|
|
|
581 |
root |
1.2 |
_txn watch_global => sub { |
582 |
root |
1.12 |
my ($self, $ok, $err, $enabled, $verbosity_mask) = @_; |
583 |
root |
1.1 |
|
584 |
root |
1.2 |
$self->send_msg (watch_global => |
585 |
|
|
enabled => $enabled ? "true" : "false", |
586 |
|
|
defined $verbosity_mask ? (verbosity_mask => $verbosity_mask+0) : (), |
587 |
|
|
); |
588 |
root |
1.1 |
|
589 |
root |
1.12 |
$ok->(); |
590 |
root |
1.2 |
}; |
591 |
root |
1.1 |
|
592 |
root |
1.11 |
=item $reqs = $fcp->list_persistent_requests |
593 |
root |
1.3 |
|
594 |
|
|
=cut |
595 |
|
|
|
596 |
root |
1.2 |
_txn list_persistent_requests => sub { |
597 |
root |
1.12 |
my ($self, $ok, $err) = @_; |
598 |
root |
1.1 |
|
599 |
root |
1.10 |
$self->serialise (list_persistent_requests => sub { |
600 |
|
|
my ($self, $guard) = @_; |
601 |
|
|
|
602 |
root |
1.11 |
my @res; |
603 |
root |
1.1 |
|
604 |
root |
1.10 |
$self->send_msg ("list_persistent_requests"); |
605 |
root |
1.1 |
|
606 |
root |
1.10 |
$self->on (sub { |
607 |
|
|
my ($self, $type, $kv, $rdata) = @_; |
608 |
root |
1.2 |
|
609 |
root |
1.10 |
$guard if 0; |
610 |
root |
1.2 |
|
611 |
root |
1.10 |
if ($type eq "end_list_persistent_requests") { |
612 |
root |
1.12 |
$ok->(\@res); |
613 |
root |
1.10 |
return; |
614 |
root |
1.2 |
} else { |
615 |
root |
1.10 |
my $id = $kv->{identifier}; |
616 |
|
|
|
617 |
|
|
if ($type =~ /^persistent_(get|put|put_dir)$/) { |
618 |
root |
1.11 |
push @res, [$type, $kv]; |
619 |
root |
1.10 |
} |
620 |
root |
1.2 |
} |
621 |
root |
1.10 |
|
622 |
|
|
1 |
623 |
|
|
}); |
624 |
|
|
}); |
625 |
root |
1.2 |
}; |
626 |
root |
1.1 |
|
627 |
root |
1.12 |
=item $sync = $fcp->modify_persistent_request ($global, $identifier[, $client_token[, $priority_class]]) |
628 |
|
|
|
629 |
|
|
Update either the C<client_token> or C<priority_class> of a request |
630 |
|
|
identified by C<$global> and C<$identifier>, depending on which of |
631 |
|
|
C<$client_token> and C<$priority_class> are not C<undef>. |
632 |
root |
1.3 |
|
633 |
|
|
=cut |
634 |
|
|
|
635 |
root |
1.12 |
_txn modify_persistent_request => sub { |
636 |
|
|
my ($self, $ok, $err, $global, $identifier, $client_token, $priority_class) = @_; |
637 |
root |
1.1 |
|
638 |
root |
1.12 |
$self->serialise ($identifier => sub { |
639 |
|
|
my ($self, $guard) = @_; |
640 |
root |
1.2 |
|
641 |
root |
1.12 |
$self->send_msg (modify_persistent_request => |
642 |
|
|
global => $global ? "true" : "false", |
643 |
|
|
identifier => $identifier, |
644 |
|
|
defined $client_token ? (client_token => $client_token ) : (), |
645 |
|
|
defined $priority_class ? (priority_class => $priority_class) : (), |
646 |
|
|
); |
647 |
root |
1.1 |
|
648 |
root |
1.12 |
$self->on (sub { |
649 |
|
|
my ($self, $type, $kv, @extra) = @_; |
650 |
root |
1.3 |
|
651 |
root |
1.13 |
$guard if 0; |
652 |
|
|
|
653 |
root |
1.12 |
if ($kv->{identifier} eq $identifier) { |
654 |
|
|
if ($type eq "persistent_request_modified") { |
655 |
|
|
$ok->($kv); |
656 |
|
|
return; |
657 |
|
|
} elsif ($type eq "protocol_error") { |
658 |
|
|
$err->($kv); |
659 |
|
|
return; |
660 |
|
|
} |
661 |
|
|
} |
662 |
root |
1.1 |
|
663 |
root |
1.2 |
1 |
664 |
root |
1.12 |
}); |
665 |
|
|
}); |
666 |
root |
1.2 |
}; |
667 |
root |
1.1 |
|
668 |
root |
1.11 |
=item $info = $fcp->get_plugin_info ($name, $detailed) |
669 |
root |
1.3 |
|
670 |
|
|
=cut |
671 |
|
|
|
672 |
root |
1.2 |
_txn get_plugin_info => sub { |
673 |
root |
1.12 |
my ($self, $ok, $err, $name, $detailed) = @_; |
674 |
root |
1.1 |
|
675 |
root |
1.15 |
my $id = $self->identifier; |
676 |
|
|
|
677 |
root |
1.2 |
$self->send_msg (get_plugin_info => |
678 |
root |
1.15 |
identifier => $id, |
679 |
root |
1.2 |
plugin_name => $name, |
680 |
|
|
detailed => $detailed ? "true" : "false", |
681 |
root |
1.15 |
); |
682 |
|
|
$self->on (sub { |
683 |
|
|
my ($self, $type, $kv) = @_; |
684 |
|
|
|
685 |
|
|
if ($kv->{identifier} eq $id) { |
686 |
|
|
if ($type eq "get_plugin_info") { |
687 |
|
|
$ok->($kv); |
688 |
|
|
} else { |
689 |
|
|
$err->($kv, $type); |
690 |
|
|
} |
691 |
|
|
return; |
692 |
|
|
} |
693 |
root |
1.2 |
|
694 |
root |
1.15 |
1 |
695 |
|
|
}); |
696 |
root |
1.4 |
}; |
697 |
|
|
|
698 |
root |
1.11 |
=item $status = $fcp->client_get ($uri, $identifier, %kv) |
699 |
root |
1.1 |
|
700 |
root |
1.4 |
%kv can contain (L<http://wiki.freenetproject.org/FCP2p0ClientGet>). |
701 |
|
|
|
702 |
|
|
ignore_ds, ds_only, verbosity, max_size, max_temp_size, max_retries, |
703 |
|
|
priority_class, persistence, client_token, global, return_type, |
704 |
|
|
binary_blob, allowed_mime_types, filename, temp_filename |
705 |
|
|
|
706 |
|
|
=cut |
707 |
|
|
|
708 |
|
|
_txn client_get => sub { |
709 |
root |
1.12 |
my ($self, $ok, $err, $uri, $identifier, %kv) = @_; |
710 |
root |
1.4 |
|
711 |
root |
1.13 |
$self->serialise ($identifier => sub { |
712 |
|
|
my ($self, $guard) = @_; |
713 |
|
|
|
714 |
|
|
$self->send_msg (client_get => |
715 |
|
|
%kv, |
716 |
|
|
uri => $uri, |
717 |
|
|
identifier => $identifier, |
718 |
|
|
); |
719 |
|
|
|
720 |
|
|
$self->on (sub { |
721 |
|
|
my ($self, $type, $kv, @extra) = @_; |
722 |
|
|
|
723 |
|
|
$guard if 0; |
724 |
|
|
|
725 |
|
|
if ($kv->{identifier} eq $identifier) { |
726 |
|
|
if ($type eq "persistent_get") { |
727 |
|
|
$ok->($kv); |
728 |
|
|
return; |
729 |
|
|
} elsif ($type eq "protocol_error") { |
730 |
|
|
$err->($kv); |
731 |
|
|
return; |
732 |
|
|
} |
733 |
|
|
} |
734 |
root |
1.12 |
|
735 |
root |
1.13 |
1 |
736 |
|
|
}); |
737 |
|
|
}); |
738 |
root |
1.11 |
}; |
739 |
|
|
|
740 |
|
|
=item $status = $fcp->remove_request ($identifier[, $global]) |
741 |
|
|
|
742 |
root |
1.24 |
Remove the request with the given identifier. Returns true if successful, |
743 |
root |
1.11 |
false on error. |
744 |
|
|
|
745 |
|
|
=cut |
746 |
|
|
|
747 |
|
|
_txn remove_request => sub { |
748 |
root |
1.12 |
my ($self, $ok, $err, $identifier, $global) = @_; |
749 |
root |
1.11 |
|
750 |
|
|
$self->serialise ($identifier => sub { |
751 |
|
|
my ($self, $guard) = @_; |
752 |
|
|
|
753 |
|
|
$self->send_msg (remove_request => |
754 |
|
|
identifier => $identifier, |
755 |
|
|
global => $global ? "true" : "false", |
756 |
|
|
); |
757 |
|
|
$self->on (sub { |
758 |
|
|
my ($self, $type, $kv, @extra) = @_; |
759 |
|
|
|
760 |
root |
1.13 |
$guard if 0; |
761 |
|
|
|
762 |
root |
1.11 |
if ($kv->{identifier} eq $identifier) { |
763 |
|
|
if ($type eq "persistent_request_removed") { |
764 |
root |
1.12 |
$ok->(1); |
765 |
root |
1.11 |
return; |
766 |
|
|
} elsif ($type eq "protocol_error") { |
767 |
root |
1.12 |
$err->($kv); |
768 |
root |
1.11 |
return; |
769 |
|
|
} |
770 |
|
|
} |
771 |
root |
1.4 |
|
772 |
|
|
1 |
773 |
root |
1.11 |
}); |
774 |
|
|
}); |
775 |
root |
1.2 |
}; |
776 |
root |
1.1 |
|
777 |
root |
1.11 |
=item ($can_read, $can_write) = $fcp->test_dda ($local_directory, $remote_directory, $want_read, $want_write)) |
778 |
root |
1.9 |
|
779 |
|
|
The DDA test in FCP is probably the single most broken protocol - only |
780 |
|
|
one directory test can be outstanding at any time, and some guessing and |
781 |
|
|
heuristics are involved in mangling the paths. |
782 |
|
|
|
783 |
|
|
This function combines C<TestDDARequest> and C<TestDDAResponse> in one |
784 |
root |
1.11 |
request, handling file reading and writing as well, and tries very hard to |
785 |
|
|
do the right thing. |
786 |
|
|
|
787 |
|
|
Both C<$local_directory> and C<$remote_directory> must specify the same |
788 |
|
|
directory - C<$local_directory> is the directory path on the client (where |
789 |
|
|
L<AnyEvent::FCP> runs) and C<$remote_directory> is the directory path on |
790 |
|
|
the server (where the freenet node runs). When both are running on the |
791 |
|
|
same node, the paths are generally identical. |
792 |
|
|
|
793 |
|
|
C<$want_read> and C<$want_write> should be set to a true value when you |
794 |
|
|
want to read (get) files or write (put) files, respectively. |
795 |
|
|
|
796 |
|
|
On error, an exception is thrown. Otherwise, C<$can_read> and |
797 |
root |
1.24 |
C<$can_write> indicate whether you can read or write to freenet via the |
798 |
root |
1.11 |
directory. |
799 |
root |
1.9 |
|
800 |
|
|
=cut |
801 |
|
|
|
802 |
|
|
_txn test_dda => sub { |
803 |
root |
1.12 |
my ($self, $ok, $err, $local, $remote, $want_read, $want_write) = @_; |
804 |
root |
1.9 |
|
805 |
|
|
$self->serialise (test_dda => sub { |
806 |
|
|
my ($self, $guard) = @_; |
807 |
|
|
|
808 |
|
|
$self->send_msg (test_dda_request => |
809 |
|
|
directory => $remote, |
810 |
|
|
want_read_directory => $want_read ? "true" : "false", |
811 |
|
|
want_write_directory => $want_write ? "true" : "false", |
812 |
|
|
); |
813 |
|
|
$self->on (sub { |
814 |
root |
1.10 |
my ($self, $type, $kv) = @_; |
815 |
root |
1.9 |
|
816 |
|
|
if ($type eq "test_dda_reply") { |
817 |
|
|
# the filenames are all relative to the server-side directory, |
818 |
|
|
# which might or might not match $remote anymore, so we |
819 |
|
|
# need to rewrite the paths to be relative to $local |
820 |
|
|
for my $k (qw(read_filename write_filename)) { |
821 |
|
|
my $f = $kv->{$k}; |
822 |
|
|
for my $dir ($kv->{directory}, $remote) { |
823 |
|
|
if ($dir eq substr $f, 0, length $dir) { |
824 |
|
|
substr $f, 0, 1 + length $dir, ""; |
825 |
|
|
$kv->{$k} = $f; |
826 |
|
|
last; |
827 |
|
|
} |
828 |
|
|
} |
829 |
|
|
} |
830 |
|
|
|
831 |
|
|
my %response = (directory => $remote); |
832 |
|
|
|
833 |
|
|
if (length $kv->{read_filename}) { |
834 |
|
|
if (open my $fh, "<:raw", "$local/$kv->{read_filename}") { |
835 |
|
|
sysread $fh, my $buf, -s $fh; |
836 |
|
|
$response{read_content} = $buf; |
837 |
|
|
} |
838 |
|
|
} |
839 |
|
|
|
840 |
|
|
if (length $kv->{write_filename}) { |
841 |
|
|
if (open my $fh, ">:raw", "$local/$kv->{write_filename}") { |
842 |
|
|
syswrite $fh, $kv->{content_to_write}; |
843 |
|
|
} |
844 |
|
|
} |
845 |
|
|
|
846 |
|
|
$self->send_msg (test_dda_response => %response); |
847 |
|
|
|
848 |
|
|
$self->on (sub { |
849 |
root |
1.10 |
my ($self, $type, $kv) = @_; |
850 |
root |
1.9 |
|
851 |
|
|
$guard if 0; # reference |
852 |
|
|
|
853 |
|
|
if ($type eq "test_dda_complete") { |
854 |
root |
1.12 |
$ok->( |
855 |
root |
1.9 |
$kv->{read_directory_allowed} eq "true", |
856 |
|
|
$kv->{write_directory_allowed} eq "true", |
857 |
|
|
); |
858 |
|
|
} elsif ($type eq "protocol_error" && $kv->{identifier} eq $remote) { |
859 |
root |
1.12 |
$err->($kv->{extra_description}); |
860 |
root |
1.9 |
return; |
861 |
|
|
} |
862 |
|
|
|
863 |
|
|
1 |
864 |
|
|
}); |
865 |
|
|
|
866 |
|
|
return; |
867 |
|
|
} elsif ($type eq "protocol_error" && $kv->{identifier} eq $remote) { |
868 |
root |
1.12 |
$err->($kv); |
869 |
root |
1.9 |
return; |
870 |
|
|
} |
871 |
|
|
|
872 |
|
|
1 |
873 |
|
|
}); |
874 |
|
|
}); |
875 |
|
|
}; |
876 |
|
|
|
877 |
root |
1.1 |
=back |
878 |
|
|
|
879 |
root |
1.11 |
=head2 REQUEST CACHE |
880 |
|
|
|
881 |
|
|
The C<AnyEvent::FCP> class keeps a request cache, where it caches all |
882 |
|
|
information from requests. |
883 |
|
|
|
884 |
|
|
For these messages, it will store a copy of the key-value pairs, together with a C<type> slot, |
885 |
|
|
in C<< $fcp->{req}{$identifier} >>: |
886 |
|
|
|
887 |
|
|
persistent_get |
888 |
|
|
persistent_put |
889 |
|
|
persistent_put_dir |
890 |
|
|
|
891 |
|
|
This message updates the stored data: |
892 |
|
|
|
893 |
|
|
persistent_request_modified |
894 |
|
|
|
895 |
|
|
This message will remove this entry: |
896 |
|
|
|
897 |
|
|
persistent_request_removed |
898 |
|
|
|
899 |
|
|
These messages get merged into the cache entry, under their |
900 |
|
|
type, i.e. a C<simple_progress> message will be stored in C<< |
901 |
|
|
$fcp->{req}{$identifier}{simple_progress} >>: |
902 |
|
|
|
903 |
|
|
simple_progress # get/put |
904 |
|
|
|
905 |
|
|
uri_generated # put |
906 |
|
|
generated_metadata # put |
907 |
|
|
started_compression # put |
908 |
|
|
finished_compression # put |
909 |
|
|
put_failed # put |
910 |
|
|
put_fetchable # put |
911 |
|
|
put_successful # put |
912 |
|
|
|
913 |
|
|
sending_to_network # get |
914 |
|
|
compatibility_mode # get |
915 |
|
|
expected_hashes # get |
916 |
|
|
expected_mime # get |
917 |
|
|
expected_data_length # get |
918 |
|
|
get_failed # get |
919 |
|
|
data_found # get |
920 |
|
|
enter_finite_cooldown # get |
921 |
|
|
|
922 |
|
|
In addition, an event (basically a fake message) of type C<request_changed> is generated |
923 |
|
|
on every change, which will be called as C<< $cb->($fcp, $kv, $type) >>, where C<$type> |
924 |
|
|
is the type of the original message triggering the change, |
925 |
|
|
|
926 |
|
|
To fill this cache with the global queue and keep it updated, |
927 |
|
|
call C<watch_global> to subscribe to updates, followed by |
928 |
root |
1.24 |
C<list_persistent_requests>. |
929 |
root |
1.11 |
|
930 |
root |
1.24 |
$fcp->watch_global_; # do not wait |
931 |
root |
1.11 |
$fcp->list_persistent_requests; # wait |
932 |
|
|
|
933 |
|
|
To get a better idea of what is stored in the cache, here is an example of |
934 |
|
|
what might be stored in C<< $fcp->{req}{"Frost-gpl.txt"} >>: |
935 |
|
|
|
936 |
|
|
{ |
937 |
|
|
identifier => "Frost-gpl.txt", |
938 |
|
|
uri => 'CHK@Fnx5kzdrfE,EImdzaVyEWl,AAIC--8/gpl.txt', |
939 |
|
|
binary_blob => "false", |
940 |
|
|
global => "true", |
941 |
|
|
max_retries => -1, |
942 |
|
|
max_size => 9223372036854775807, |
943 |
|
|
persistence => "forever", |
944 |
|
|
priority_class => 3, |
945 |
|
|
real_time => "false", |
946 |
|
|
return_type => "direct", |
947 |
|
|
started => "true", |
948 |
|
|
type => "persistent_get", |
949 |
|
|
verbosity => 2147483647, |
950 |
|
|
sending_to_network => { |
951 |
|
|
identifier => "Frost-gpl.txt", |
952 |
|
|
global => "true", |
953 |
|
|
}, |
954 |
|
|
compatibility_mode => { |
955 |
|
|
identifier => "Frost-gpl.txt", |
956 |
|
|
definitive => "true", |
957 |
|
|
dont_compress => "false", |
958 |
|
|
global => "true", |
959 |
|
|
max => "COMPAT_1255", |
960 |
|
|
min => "COMPAT_1255", |
961 |
|
|
}, |
962 |
|
|
expected_hashes => { |
963 |
|
|
identifier => "Frost-gpl.txt", |
964 |
|
|
global => "true", |
965 |
|
|
hashes => { |
966 |
|
|
ed2k => "d83596f5ee3b7...", |
967 |
|
|
md5 => "e0894e4a2a6...", |
968 |
|
|
sha1 => "...", |
969 |
|
|
sha256 => "...", |
970 |
|
|
sha512 => "...", |
971 |
|
|
tth => "...", |
972 |
|
|
}, |
973 |
|
|
}, |
974 |
|
|
expected_mime => { |
975 |
|
|
identifier => "Frost-gpl.txt", |
976 |
|
|
global => "true", |
977 |
|
|
metadata => { content_type => "application/rar" }, |
978 |
|
|
}, |
979 |
|
|
expected_data_length => { |
980 |
|
|
identifier => "Frost-gpl.txt", |
981 |
|
|
data_length => 37576, |
982 |
|
|
global => "true", |
983 |
|
|
}, |
984 |
|
|
simple_progress => { |
985 |
|
|
identifier => "Frost-gpl.txt", |
986 |
|
|
failed => 0, |
987 |
|
|
fatally_failed => 0, |
988 |
|
|
finalized_total => "true", |
989 |
|
|
global => "true", |
990 |
|
|
last_progress => 1438639282628, |
991 |
|
|
required => 372, |
992 |
|
|
succeeded => 102, |
993 |
|
|
total => 747, |
994 |
|
|
}, |
995 |
|
|
data_found => { |
996 |
|
|
identifier => "Frost-gpl.txt", |
997 |
|
|
completion_time => 1438663354026, |
998 |
|
|
data_length => 37576, |
999 |
|
|
global => "true", |
1000 |
|
|
metadata => { content_type => "image/jpeg" }, |
1001 |
|
|
startup_time => 1438657196167, |
1002 |
|
|
}, |
1003 |
|
|
} |
1004 |
|
|
|
1005 |
root |
1.3 |
=head1 EXAMPLE PROGRAM |
1006 |
|
|
|
1007 |
|
|
use AnyEvent::FCP; |
1008 |
|
|
|
1009 |
|
|
my $fcp = new AnyEvent::FCP; |
1010 |
|
|
|
1011 |
|
|
# let us look at the global request list |
1012 |
root |
1.11 |
$fcp->watch_global_ (1); |
1013 |
root |
1.3 |
|
1014 |
|
|
# list them, synchronously |
1015 |
root |
1.11 |
my $req = $fcp->list_persistent_requests; |
1016 |
root |
1.3 |
|
1017 |
|
|
# go through all requests |
1018 |
root |
1.11 |
TODO |
1019 |
root |
1.3 |
for my $req (values %$req) { |
1020 |
|
|
# skip jobs not directly-to-disk |
1021 |
|
|
next unless $req->{return_type} eq "disk"; |
1022 |
|
|
# skip jobs not issued by FProxy |
1023 |
|
|
next unless $req->{identifier} =~ /^FProxy:/; |
1024 |
|
|
|
1025 |
|
|
if ($req->{data_found}) { |
1026 |
|
|
# file has been successfully downloaded |
1027 |
|
|
|
1028 |
|
|
... move the file away |
1029 |
|
|
(left as exercise) |
1030 |
|
|
|
1031 |
|
|
# remove the request |
1032 |
|
|
|
1033 |
|
|
$fcp->remove_request (1, $req->{identifier}); |
1034 |
|
|
} elsif ($req->{get_failed}) { |
1035 |
|
|
# request has failed |
1036 |
|
|
if ($req->{get_failed}{code} == 11) { |
1037 |
|
|
# too many path components, should restart |
1038 |
|
|
} else { |
1039 |
|
|
# other failure |
1040 |
|
|
} |
1041 |
|
|
} else { |
1042 |
|
|
# modify priorities randomly, to improve download rates |
1043 |
|
|
$fcp->modify_persistent_request (1, $req->{identifier}, undef, int 6 - 5 * (rand) ** 1.7) |
1044 |
|
|
if 0.1 > rand; |
1045 |
|
|
} |
1046 |
|
|
} |
1047 |
|
|
|
1048 |
|
|
# see if the dummy plugin is loaded, to ensure all previous requests have finished. |
1049 |
root |
1.24 |
$fcp->get_plugin_info ("dummy"); |
1050 |
root |
1.3 |
|
1051 |
root |
1.1 |
=head1 SEE ALSO |
1052 |
|
|
|
1053 |
root |
1.2 |
L<http://wiki.freenetproject.org/FreenetFCPSpec2Point0>, L<Net::FCP>. |
1054 |
root |
1.1 |
|
1055 |
|
|
=head1 BUGS |
1056 |
|
|
|
1057 |
|
|
=head1 AUTHOR |
1058 |
|
|
|
1059 |
|
|
Marc Lehmann <schmorp@schmorp.de> |
1060 |
|
|
http://home.schmorp.de/ |
1061 |
|
|
|
1062 |
|
|
=cut |
1063 |
|
|
|
1064 |
|
|
1 |
1065 |
|
|
|