… | |
… | |
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; |
… | |
… | |
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. |
|
|
98 | |
|
|
99 | The following keys can be specified (they are all optional): |
|
|
100 | |
|
|
101 | =over 4 |
|
|
102 | |
|
|
103 | =item name => $string |
|
|
104 | |
|
|
105 | A unique name to identify this client. If none is specified, a randomly |
|
|
106 | generated name will be used. |
|
|
107 | |
|
|
108 | =item host => $hostname |
|
|
109 | |
|
|
110 | The hostname or IP address of the freenet node. Default is C<$ENV{FREDHOST}> |
|
|
111 | or C<127.0.0.1>. |
|
|
112 | |
|
|
113 | =item port => $portnumber |
|
|
114 | |
|
|
115 | The port number of the FCP port. Default is C<$ENV{FREDPORT}> or C<9481>. |
|
|
116 | |
|
|
117 | =item timeout => $seconds |
|
|
118 | |
|
|
119 | The timeout, in seconds, after which a connection error is assumed when |
|
|
120 | there is no activity. Default is C<7200>, i.e. two hours. |
|
|
121 | |
|
|
122 | =item keepalive => $seconds |
|
|
123 | |
|
|
124 | The interval, in seconds, at which keepalive messages will be |
|
|
125 | sent. Default is C<540>, i.e. nine minutes. |
|
|
126 | |
|
|
127 | These keepalive messages are useful both to detect that a connection is |
|
|
128 | no longer working and to keep any (home) routers from expiring their |
|
|
129 | masquerading entry. |
|
|
130 | |
|
|
131 | =item on_eof => $callback->($fcp) |
|
|
132 | |
|
|
133 | Invoked when the underlying L<AnyEvent::Handle> signals EOF, currently |
|
|
134 | regardless of whether the EOF was expected or not. |
|
|
135 | |
|
|
136 | =item on_error => $callback->($fcp, $message) |
|
|
137 | |
|
|
138 | Invoked on any (fatal) errors, such as unexpected connection close. The |
|
|
139 | callback receives the FCP object and a textual error message. |
|
|
140 | |
|
|
141 | =item on_failure => $callback->($fcp, $type, $backtrace, $args, $error) |
|
|
142 | |
|
|
143 | Invoked when an FCP request fails that didn't have a failure callback. See |
|
|
144 | L<FCP REQUESTS> for details. |
|
|
145 | |
|
|
146 | =back |
98 | |
147 | |
99 | =cut |
148 | =cut |
100 | |
149 | |
101 | sub new { |
150 | sub new { |
102 | my $class = shift; |
151 | my $class = shift; |
… | |
… | |
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}, |
194 | on_read => $on_read, |
243 | on_read => $on_read, |
195 | on_eof => $self->{on_eof}, |
244 | on_eof => sub { |
|
|
245 | if ($self->{on_eof}) { |
|
|
246 | $self->{on_eof}($self); |
|
|
247 | } else { |
|
|
248 | $self->fatal ("EOF"); |
|
|
249 | } |
|
|
250 | }, |
196 | on_error => sub { |
251 | on_error => sub { |
197 | $self->fatal ($_[2]); |
252 | $self->fatal ($_[2]); |
198 | }, |
253 | }, |
199 | ; |
254 | ; |
200 | |
255 | |
… | |
… | |
214 | |
269 | |
215 | $self->{hdl}->shutdown; |
270 | $self->{hdl}->shutdown; |
216 | delete $self->{kw}; |
271 | delete $self->{kw}; |
217 | |
272 | |
218 | if ($self->{on_error}) { |
273 | if ($self->{on_error}) { |
219 | $self->{on_error}->($msg); |
274 | $self->{on_error}->($self, $msg); |
220 | } else { |
275 | } else { |
221 | die $msg; |
276 | die $msg; |
222 | } |
277 | } |
223 | } |
278 | } |
224 | |
279 | |
… | |
… | |
370 | |
425 | |
371 | Also comes in this underscore variant: |
426 | Also comes in this underscore variant: |
372 | |
427 | |
373 | $fcp->get_plugin_info_ ($name, $detailed, $cb); |
428 | $fcp->get_plugin_info_ ($name, $detailed, $cb); |
374 | |
429 | |
375 | You can thinbk of the underscore as a kind of continuation indicator - the |
430 | You can think of the underscore as a kind of continuation indicator - the |
376 | normal function waits and returns with the data, the C<_> indicates that |
431 | normal function waits and returns with the data, the C<_> indicates that |
377 | you pass the continuation yourself, and the continuation will be invoked |
432 | you pass the continuation yourself, and the continuation will be invoked |
378 | with the results. |
433 | with the results. |
379 | |
434 | |
380 | This callback/continuation argument (C<$cb>) can come in three forms itself: |
435 | This callback/continuation argument (C<$cb>) can come in three forms itself: |
… | |
… | |
382 | =over 4 |
437 | =over 4 |
383 | |
438 | |
384 | =item A code reference (or rather anything not matching some other alternative) |
439 | =item A code reference (or rather anything not matching some other alternative) |
385 | |
440 | |
386 | This code reference will be invoked with the result on success. On an |
441 | This code reference will be invoked with the result on success. On an |
|
|
442 | error, it will invoke the C<on_failure> callback of the FCP object, or, |
387 | error, it will die (in the event loop) with a backtrace of the call site. |
443 | if none was defined, will die (in the event loop) with a backtrace of the |
|
|
444 | call site. |
388 | |
445 | |
389 | This is a popular choice, but it makes handling errors hard - make sure |
446 | This is a popular choice, but it makes handling errors hard - make sure |
390 | you never generate protocol errors! |
447 | you never generate protocol errors! |
|
|
448 | |
|
|
449 | In the failure case, if an C<on_failure> hook exists, it will be invoked |
|
|
450 | with the FCP object, the request type (the name of the method), a |
|
|
451 | (textual) backtrace as generated by C<Carp::longmess>, and arrayref |
|
|
452 | containing the arguments from the original request invocation and the |
|
|
453 | error object from the server, in this order, e.g.: |
|
|
454 | |
|
|
455 | on_failure => sub { |
|
|
456 | my ($fcp, $request_type, $backtrace, $orig_args, $error_object) = @_; |
|
|
457 | |
|
|
458 | warn "FCP failure ($type), $error_object->{code_description} ($error_object->{extra_description})$backtrace"; |
|
|
459 | exit 1; |
|
|
460 | }, |
391 | |
461 | |
392 | =item A condvar (as returned by e.g. C<< AnyEvent->condvar >>) |
462 | =item A condvar (as returned by e.g. C<< AnyEvent->condvar >>) |
393 | |
463 | |
394 | 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 |
395 | 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 |
… | |
… | |
400 | =item An array with two callbacks C<[$success, $failure]> |
470 | =item An array with two callbacks C<[$success, $failure]> |
401 | |
471 | |
402 | The C<$success> callback will be invoked with the results, while the |
472 | The C<$success> callback will be invoked with the results, while the |
403 | C<$failure> callback will be invoked on any errors. |
473 | C<$failure> callback will be invoked on any errors. |
404 | |
474 | |
|
|
475 | The C<$failure> callback will be invoked with the error object from the |
|
|
476 | server. |
|
|
477 | |
405 | =item C<undef> |
478 | =item C<undef> |
406 | |
479 | |
407 | 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 |
408 | 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 |
409 | with a backtrace. |
482 | is invoked or the module dies with a backtrace. |
410 | |
483 | |
411 | 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 |
412 | the results. |
485 | the results. |
413 | |
486 | |
414 | =back |
487 | =back |
… | |
… | |
434 | if (ARRAY:: eq ref $ok) { |
507 | if (ARRAY:: eq ref $ok) { |
435 | ($ok, $err) = @$ok; |
508 | ($ok, $err) = @$ok; |
436 | } elsif (UNIVERSAL::isa $ok, AnyEvent::CondVar::) { |
509 | } elsif (UNIVERSAL::isa $ok, AnyEvent::CondVar::) { |
437 | $err = sub { $ok->croak ($_[0]{extra_description}) }; |
510 | $err = sub { $ok->croak ($_[0]{extra_description}) }; |
438 | } else { |
511 | } else { |
439 | 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; |
440 | $err = sub { |
515 | $err = sub { |
|
|
516 | if ($self->{on_failure}) { |
|
|
517 | $self->{on_failure}($self, $name, $args, $bt, $_[0]); |
|
|
518 | } else { |
441 | die "$_[0]{code_description} ($_[0]{extra_description})$bt"; |
519 | die "$_[0]{code_description} ($_[0]{extra_description})$bt"; |
|
|
520 | } |
442 | }; |
521 | }; |
443 | } |
522 | } |
444 | |
523 | |
445 | $ok ||= $NOP_CB; |
524 | $ok ||= $NOP_CB; |
446 | |
525 | |
… | |
… | |
658 | }); |
737 | }); |
659 | }; |
738 | }; |
660 | |
739 | |
661 | =item $status = $fcp->remove_request ($identifier[, $global]) |
740 | =item $status = $fcp->remove_request ($identifier[, $global]) |
662 | |
741 | |
663 | Remove the request with the given isdentifier. Returns true if successful, |
742 | Remove the request with the given identifier. Returns true if successful, |
664 | false on error. |
743 | false on error. |
665 | |
744 | |
666 | =cut |
745 | =cut |
667 | |
746 | |
668 | _txn remove_request => sub { |
747 | _txn remove_request => sub { |
… | |
… | |
713 | |
792 | |
714 | C<$want_read> and C<$want_write> should be set to a true value when you |
793 | C<$want_read> and C<$want_write> should be set to a true value when you |
715 | want to read (get) files or write (put) files, respectively. |
794 | want to read (get) files or write (put) files, respectively. |
716 | |
795 | |
717 | On error, an exception is thrown. Otherwise, C<$can_read> and |
796 | On error, an exception is thrown. Otherwise, C<$can_read> and |
718 | C<$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 |
719 | directory. |
798 | directory. |
720 | |
799 | |
721 | =cut |
800 | =cut |
722 | |
801 | |
723 | _txn test_dda => sub { |
802 | _txn test_dda => sub { |
… | |
… | |
844 | 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> |
845 | is the type of the original message triggering the change, |
924 | is the type of the original message triggering the change, |
846 | |
925 | |
847 | 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, |
848 | call C<watch_global> to subscribe to updates, followed by |
927 | call C<watch_global> to subscribe to updates, followed by |
849 | C<list_persistent_requests_sync>. |
928 | C<list_persistent_requests>. |
850 | |
929 | |
851 | $fcp->watch_global_sync_; # do not wait |
930 | $fcp->watch_global_; # do not wait |
852 | $fcp->list_persistent_requests; # wait |
931 | $fcp->list_persistent_requests; # wait |
853 | |
932 | |
854 | 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 |
855 | what might be stored in C<< $fcp->{req}{"Frost-gpl.txt"} >>: |
934 | what might be stored in C<< $fcp->{req}{"Frost-gpl.txt"} >>: |
856 | |
935 | |
… | |
… | |
965 | if 0.1 > rand; |
1044 | if 0.1 > rand; |
966 | } |
1045 | } |
967 | } |
1046 | } |
968 | |
1047 | |
969 | # 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. |
970 | $fcp->get_plugin_info_sync ("dummy"); |
1049 | $fcp->get_plugin_info ("dummy"); |
971 | |
1050 | |
972 | =head1 SEE ALSO |
1051 | =head1 SEE ALSO |
973 | |
1052 | |
974 | L<http://wiki.freenetproject.org/FreenetFCPSpec2Point0>, L<Net::FCP>. |
1053 | L<http://wiki.freenetproject.org/FreenetFCPSpec2Point0>, L<Net::FCP>. |
975 | |
1054 | |