… | |
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61 | |
61 | |
62 | use common::sense; |
62 | use common::sense; |
63 | |
63 | |
64 | use Carp; |
64 | use Carp; |
65 | |
65 | |
66 | our $VERSION = 0.4; |
66 | our $VERSION = 0.5; |
67 | |
67 | |
68 | use Scalar::Util (); |
68 | use Scalar::Util (); |
69 | |
69 | |
70 | use AnyEvent; |
70 | use AnyEvent; |
71 | use AnyEvent::Handle; |
71 | use AnyEvent::Handle; |
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… | |
86 | 1 while s/([^_])(SVK|CHK|URI|FCP|DS|MIME|DDA)/$1\_$2/; |
86 | 1 while s/([^_])(SVK|CHK|URI|FCP|DS|MIME|DDA)/$1\_$2/; |
87 | s/(?<=[a-z])(?=[A-Z])/_/g; |
87 | s/(?<=[a-z])(?=[A-Z])/_/g; |
88 | lc |
88 | lc |
89 | } |
89 | } |
90 | |
90 | |
91 | =item $fcp = new AnyEvent::FCP [host => $host][, port => $port][, name => $name] |
91 | =item $fcp = new AnyEvent::FCP key => value...; |
92 | |
92 | |
93 | Create a new FCP connection to the given host and port (default |
93 | Create a new FCP connection to the given host and port (default |
94 | 127.0.0.1:9481, or the environment variables C<FREDHOST> and C<FREDPORT>). |
94 | 127.0.0.1:9481, or the environment variables C<FREDHOST> and C<FREDPORT>). |
95 | |
95 | |
96 | If no C<name> was specified, then AnyEvent::FCP will generate a |
96 | If no C<name> was specified, then AnyEvent::FCP will generate a |
97 | (hopefully) unique client name for you. |
97 | (hopefully) unique client name for you. |
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98 | |
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99 | The following keys can be specified (they are all optional): |
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100 | |
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101 | =over 4 |
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102 | |
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103 | =item name => $string |
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104 | |
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105 | A unique name to identify this client. If none is specified, a randomly |
|
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106 | generated name will be used. |
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107 | |
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108 | =item host => $hostname |
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109 | |
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110 | The hostname or IP address of the freenet node. Default is C<$ENV{FREDHOST}> |
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111 | or C<127.0.0.1>. |
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112 | |
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113 | =item port => $portnumber |
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114 | |
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115 | The port number of the FCP port. Default is C<$ENV{FREDPORT}> or C<9481>. |
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116 | |
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117 | =item timeout => $seconds |
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118 | |
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119 | The timeout, in seconds, after which a connection error is assumed when |
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120 | there is no activity. Default is C<7200>, i.e. two hours. |
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121 | |
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122 | =item keepalive => $seconds |
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123 | |
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124 | The interval, in seconds, at which keepalive messages will be |
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125 | sent. Default is C<540>, i.e. nine minutes. |
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126 | |
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127 | These keepalive messages are useful both to detect that a connection is |
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128 | no longer working and to keep any (home) routers from expiring their |
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129 | masquerading entry. |
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130 | |
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131 | =item on_eof => $callback->($fcp) |
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132 | |
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133 | Invoked when the underlying L<AnyEvent::Handle> signals EOF, currently |
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134 | regardless of whether the EOF was expected or not. |
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135 | |
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136 | =item on_error => $callback->($fcp, $message) |
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137 | |
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138 | Invoked on any (fatal) errors, such as unexpected connection close. The |
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139 | callback receives the FCP object and a textual error message. |
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140 | |
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141 | =item on_failure => $callback->($fcp, $type, $backtrace, $args, $error) |
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142 | |
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143 | Invoked when an FCP request fails that didn't have a failure callback. See |
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144 | L<FCP REQUESTS> for details. |
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145 | |
|
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146 | =back |
98 | |
147 | |
99 | =cut |
148 | =cut |
100 | |
149 | |
101 | sub new { |
150 | sub new { |
102 | my $class = shift; |
151 | my $class = shift; |
… | |
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135 | # we only carve out whole messages here |
184 | # we only carve out whole messages here |
136 | while ($hdl->{rbuf} =~ /\012(EndMessage|Data)\012/) { |
185 | while ($hdl->{rbuf} =~ /\012(EndMessage|Data)\012/) { |
137 | # remember end marker |
186 | # remember end marker |
138 | $rdata = $1 eq "Data" |
187 | $rdata = $1 eq "Data" |
139 | or $1 eq "EndMessage" |
188 | or $1 eq "EndMessage" |
140 | or die "protocol error, expected message end, got $1\n"; |
189 | or return $self->fatal ("protocol error, expected message end, got $1\n"); |
141 | |
190 | |
142 | my @lines = split /\012/, substr $hdl->{rbuf}, 0, $-[0]; |
191 | my @lines = split /\012/, substr $hdl->{rbuf}, 0, $-[0]; |
143 | |
192 | |
144 | substr $hdl->{rbuf}, 0, $+[0], ""; # remove pkg |
193 | substr $hdl->{rbuf}, 0, $+[0], ""; # remove pkg |
145 | |
194 | |
… | |
… | |
189 | }; |
238 | }; |
190 | |
239 | |
191 | $self->{hdl} = new AnyEvent::Handle |
240 | $self->{hdl} = new AnyEvent::Handle |
192 | connect => [$self->{host} => $self->{port}], |
241 | connect => [$self->{host} => $self->{port}], |
193 | timeout => $self->{timeout}, |
242 | timeout => $self->{timeout}, |
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243 | on_read => $on_read, |
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244 | on_eof => sub { |
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245 | if ($self->{on_eof}) { |
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246 | $self->{on_eof}($self); |
|
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247 | } else { |
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248 | $self->fatal ("EOF"); |
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249 | } |
|
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250 | }, |
194 | on_error => sub { |
251 | on_error => sub { |
195 | warn "$self->{host}: $_[2]\n";#d# |
252 | $self->fatal ($_[2]); |
196 | exit 1; |
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197 | }, |
253 | }, |
198 | on_read => $on_read, |
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199 | on_eof => $self->{on_eof} || sub { }, |
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200 | ; |
254 | ; |
201 | |
255 | |
202 | Scalar::Util::weaken ($self->{hdl}{fcp} = $self); |
256 | Scalar::Util::weaken ($self->{hdl}{fcp} = $self); |
203 | } |
257 | } |
204 | |
258 | |
… | |
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206 | name => $self->{name}, |
260 | name => $self->{name}, |
207 | expected_version => "2.0", |
261 | expected_version => "2.0", |
208 | ); |
262 | ); |
209 | |
263 | |
210 | $self |
264 | $self |
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265 | } |
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266 | |
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267 | sub fatal { |
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268 | my ($self, $msg) = @_; |
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269 | |
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270 | $self->{hdl}->shutdown; |
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271 | delete $self->{kw}; |
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272 | |
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273 | if ($self->{on_error}) { |
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274 | $self->{on_error}->($self, $msg); |
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275 | } else { |
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276 | die $msg; |
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277 | } |
211 | } |
278 | } |
212 | |
279 | |
213 | sub identifier { |
280 | sub identifier { |
214 | $_[0]{prefix} . ++$_[0]{idseq} |
281 | $_[0]{prefix} . ++$_[0]{idseq} |
215 | } |
282 | } |
… | |
… | |
358 | |
425 | |
359 | Also comes in this underscore variant: |
426 | Also comes in this underscore variant: |
360 | |
427 | |
361 | $fcp->get_plugin_info_ ($name, $detailed, $cb); |
428 | $fcp->get_plugin_info_ ($name, $detailed, $cb); |
362 | |
429 | |
363 | You can thinbk of the underscore as a kind of continuation indicator - the |
430 | You can think of the underscore as a kind of continuation indicator - the |
364 | normal function waits and returns with the data, the C<_> indicates that |
431 | normal function waits and returns with the data, the C<_> indicates that |
365 | you pass the continuation yourself, and the continuation will be invoked |
432 | you pass the continuation yourself, and the continuation will be invoked |
366 | with the results. |
433 | with the results. |
367 | |
434 | |
368 | This callback/continuation argument (C<$cb>) can come in three forms itself: |
435 | This callback/continuation argument (C<$cb>) can come in three forms itself: |
… | |
… | |
370 | =over 4 |
437 | =over 4 |
371 | |
438 | |
372 | =item A code reference (or rather anything not matching some other alternative) |
439 | =item A code reference (or rather anything not matching some other alternative) |
373 | |
440 | |
374 | This code reference will be invoked with the result on success. On an |
441 | This code reference will be invoked with the result on success. On an |
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442 | error, it will invoke the C<on_failure> callback of the FCP object, or, |
375 | error, it will die (in the event loop) with a backtrace of the call site. |
443 | if none was defined, will die (in the event loop) with a backtrace of the |
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444 | call site. |
376 | |
445 | |
377 | This is a popular choice, but it makes handling errors hard - make sure |
446 | This is a popular choice, but it makes handling errors hard - make sure |
378 | you never generate protocol errors! |
447 | you never generate protocol errors! |
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448 | |
|
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449 | In the failure case, if an C<on_failure> hook exists, it will be invoked |
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450 | with the FCP object, the request type (the name of the method), a |
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451 | (textual) backtrace as generated by C<Carp::longmess>, and arrayref |
|
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452 | containing the arguments from the original request invocation and the |
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453 | error object from the server, in this order, e.g.: |
|
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454 | |
|
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455 | on_failure => sub { |
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456 | my ($fcp, $request_type, $backtrace, $orig_args, $error_object) = @_; |
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457 | |
|
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458 | warn "FCP failure ($type), $error_object->{code_description} ($error_object->{extra_description})$backtrace"; |
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459 | exit 1; |
|
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460 | }, |
379 | |
461 | |
380 | =item A condvar (as returned by e.g. C<< AnyEvent->condvar >>) |
462 | =item A condvar (as returned by e.g. C<< AnyEvent->condvar >>) |
381 | |
463 | |
382 | When a condvar is passed, it is sent (C<< $cv->send ($results) >>) the |
464 | When a condvar is passed, it is sent (C<< $cv->send ($results) >>) the |
383 | results when the request has finished. Should an error occur, the error |
465 | results when the request has finished. Should an error occur, the error |
… | |
… | |
388 | =item An array with two callbacks C<[$success, $failure]> |
470 | =item An array with two callbacks C<[$success, $failure]> |
389 | |
471 | |
390 | The C<$success> callback will be invoked with the results, while the |
472 | The C<$success> callback will be invoked with the results, while the |
391 | C<$failure> callback will be invoked on any errors. |
473 | C<$failure> callback will be invoked on any errors. |
392 | |
474 | |
|
|
475 | The C<$failure> callback will be invoked with the error object from the |
|
|
476 | server. |
|
|
477 | |
393 | =item C<undef> |
478 | =item C<undef> |
394 | |
479 | |
395 | This is the same thing as specifying C<sub { }> as callback, i.e. on |
480 | This is the same thing as specifying C<sub { }> as callback, i.e. on |
396 | success, the results are ignored, while on failure, you the module dies |
481 | success, the results are ignored, while on failure, the C<on_failure> hook |
397 | with a backtrace. |
482 | is invoked or the module dies with a backtrace. |
398 | |
483 | |
399 | This is good for quick scripts, or when you really aren't interested in |
484 | This is good for quick scripts, or when you really aren't interested in |
400 | the results. |
485 | the results. |
401 | |
486 | |
402 | =back |
487 | =back |
… | |
… | |
422 | if (ARRAY:: eq ref $ok) { |
507 | if (ARRAY:: eq ref $ok) { |
423 | ($ok, $err) = @$ok; |
508 | ($ok, $err) = @$ok; |
424 | } elsif (UNIVERSAL::isa $ok, AnyEvent::CondVar::) { |
509 | } elsif (UNIVERSAL::isa $ok, AnyEvent::CondVar::) { |
425 | $err = sub { $ok->croak ($_[0]{extra_description}) }; |
510 | $err = sub { $ok->croak ($_[0]{extra_description}) }; |
426 | } else { |
511 | } else { |
427 | my $bt = Carp::longmess ""; |
512 | my $bt = Carp::longmess "AnyEvent::FCP request $name"; |
|
|
513 | Scalar::Util::weaken (my $self = $_[0]); |
|
|
514 | my $args = [@_]; shift @$args; |
428 | $err = sub { |
515 | $err = sub { |
|
|
516 | if ($self->{on_failure}) { |
|
|
517 | $self->{on_failure}($self, $name, $args, $bt, $_[0]); |
|
|
518 | } else { |
429 | die "$_[0]{code_description} ($_[0]{extra_description})$bt"; |
519 | die "$_[0]{code_description} ($_[0]{extra_description})$bt"; |
|
|
520 | } |
430 | }; |
521 | }; |
431 | } |
522 | } |
432 | |
523 | |
433 | $ok ||= $NOP_CB; |
524 | $ok ||= $NOP_CB; |
434 | |
525 | |
… | |
… | |
646 | }); |
737 | }); |
647 | }; |
738 | }; |
648 | |
739 | |
649 | =item $status = $fcp->remove_request ($identifier[, $global]) |
740 | =item $status = $fcp->remove_request ($identifier[, $global]) |
650 | |
741 | |
651 | Remove the request with the given isdentifier. Returns true if successful, |
742 | Remove the request with the given identifier. Returns true if successful, |
652 | false on error. |
743 | false on error. |
653 | |
744 | |
654 | =cut |
745 | =cut |
655 | |
746 | |
656 | _txn remove_request => sub { |
747 | _txn remove_request => sub { |
… | |
… | |
701 | |
792 | |
702 | C<$want_read> and C<$want_write> should be set to a true value when you |
793 | C<$want_read> and C<$want_write> should be set to a true value when you |
703 | want to read (get) files or write (put) files, respectively. |
794 | want to read (get) files or write (put) files, respectively. |
704 | |
795 | |
705 | On error, an exception is thrown. Otherwise, C<$can_read> and |
796 | On error, an exception is thrown. Otherwise, C<$can_read> and |
706 | C<$can_write> indicate whether you can reaqd or write to freenet via the |
797 | C<$can_write> indicate whether you can read or write to freenet via the |
707 | directory. |
798 | directory. |
708 | |
799 | |
709 | =cut |
800 | =cut |
710 | |
801 | |
711 | _txn test_dda => sub { |
802 | _txn test_dda => sub { |
… | |
… | |
832 | on every change, which will be called as C<< $cb->($fcp, $kv, $type) >>, where C<$type> |
923 | on every change, which will be called as C<< $cb->($fcp, $kv, $type) >>, where C<$type> |
833 | is the type of the original message triggering the change, |
924 | is the type of the original message triggering the change, |
834 | |
925 | |
835 | To fill this cache with the global queue and keep it updated, |
926 | To fill this cache with the global queue and keep it updated, |
836 | call C<watch_global> to subscribe to updates, followed by |
927 | call C<watch_global> to subscribe to updates, followed by |
837 | C<list_persistent_requests_sync>. |
928 | C<list_persistent_requests>. |
838 | |
929 | |
839 | $fcp->watch_global_sync_; # do not wait |
930 | $fcp->watch_global_; # do not wait |
840 | $fcp->list_persistent_requests; # wait |
931 | $fcp->list_persistent_requests; # wait |
841 | |
932 | |
842 | To get a better idea of what is stored in the cache, here is an example of |
933 | To get a better idea of what is stored in the cache, here is an example of |
843 | what might be stored in C<< $fcp->{req}{"Frost-gpl.txt"} >>: |
934 | what might be stored in C<< $fcp->{req}{"Frost-gpl.txt"} >>: |
844 | |
935 | |
… | |
… | |
953 | if 0.1 > rand; |
1044 | if 0.1 > rand; |
954 | } |
1045 | } |
955 | } |
1046 | } |
956 | |
1047 | |
957 | # see if the dummy plugin is loaded, to ensure all previous requests have finished. |
1048 | # see if the dummy plugin is loaded, to ensure all previous requests have finished. |
958 | $fcp->get_plugin_info_sync ("dummy"); |
1049 | $fcp->get_plugin_info ("dummy"); |
959 | |
1050 | |
960 | =head1 SEE ALSO |
1051 | =head1 SEE ALSO |
961 | |
1052 | |
962 | L<http://wiki.freenetproject.org/FreenetFCPSpec2Point0>, L<Net::FCP>. |
1053 | L<http://wiki.freenetproject.org/FreenetFCPSpec2Point0>, L<Net::FCP>. |
963 | |
1054 | |