[ViewVC] Diff of: cvs/Net-FCP/FCP.pm

Comparing Net-FCP/FCP.pm (file contents):
Revision 1.13 by root, Wed Sep 10 05:06:16 2003 UTC vs.
Revision 1.36 by root, Thu Dec 1 22:07:40 2005 UTC

…		…
13		13
14	=head1 DESCRIPTION	14	=head1 DESCRIPTION
15		15
16	See L<http://freenet.sourceforge.net/index.php?page=fcp> for a description	16	See L<http://freenet.sourceforge.net/index.php?page=fcp> for a description
17	of what the messages do. I am too lazy to document all this here.	17	of what the messages do. I am too lazy to document all this here.
		18
		19	The module uses L<AnyEvent> to find a suitable Event module.
18		20
19	=head1 WARNING	21	=head1 WARNING
20		22
21	This module is alpha. While it probably won't destroy (much :) of your	23	This module is alpha. While it probably won't destroy (much :) of your
22	data, it currently falls short of what it should provide (intelligent uri	24	data, it currently falls short of what it should provide (intelligent uri
23	following, splitfile downloads, healing...)	25	following, splitfile downloads, healing...)
24		26
25	=head2 IMPORT TAGS	27	=head2 IMPORT TAGS
26		28
27	Nothing much can be "imported" from this module right now. There are,	29	Nothing much can be "imported" from this module right now.
28	however, certain "import tags" that can be used to select the event model
29	to be used.
30		30
31	Event models are implemented as modules under the C<Net::FCP::Event::xyz>	31	=head2 FREENET BASICS
32	class, where C<xyz> is the event model to use. The default is C<Event> (or
33	later C<Auto>).
34		32
35	The import tag to use is named C<event=xyz>, e.g. C<event=Event>,	33	Ok, this section will not explain any freenet basics to you, just some
36	C<event=Glib> etc.	34	problems I found that you might want to avoid:
37		35
38	You should specify the event module to use only in the main program.	36	=over 4
		37
		38	=item freenet URIs are _NOT_ URIs
		39
		40	Whenever a "uri" is required by the protocol, freenet expects a kind of
		41	URI prefixed with the "freenet:" scheme, e.g. "freenet:CHK...". However,
		42	these are not URIs, as freeent fails to parse them correctly, that is, you
		43	must unescape an escaped characters ("%2c" => ",") yourself. Maybe in the
		44	future this library will do it for you, so watch out for this incompatible
		45	change.
		46
		47	=item Numbers are in HEX
		48
		49	Virtually every number in the FCP protocol is in hex. Be sure to use
		50	C<hex()> on all such numbers, as the module (currently) does nothing to
		51	convert these for you.
		52
		53	=back
39		54
40	=head2 THE Net::FCP CLASS	55	=head2 THE Net::FCP CLASS
41		56
42	=over 4	57	=over 4
43		58
…		…
45		60
46	package Net::FCP;	61	package Net::FCP;
47		62
48	use Carp;	63	use Carp;
49		64
50	$VERSION = 0.05;	65	$VERSION = '1.0';
51		66
52	no warnings;	67	no warnings;
53		68
54	our $EVENT = Net::FCP::Event::Auto::;	69	use AnyEvent;
55	$EVENT = Net::FCP::Event::Event;#d#
56		70
57	sub import {	71	use Net::FCP::Metadata;
58	shift;	72	use Net::FCP::Util qw(tolc touc xeh);
59		73
60	for (@_) {
61	if (/^event=(\w+)$/) {
62	$EVENT = "Net::FCP::Event::$1";
63	}
64	}
65	eval "require $EVENT";
66	die $@ if $@;
67	}
68
69	sub touc($) {
70	local $_ = shift;
71	1 while s/((?:^\|_)(?:svk\|chk\|uri)(?:_\|$))/\U$1/;
72	s/(?:^\|_)(.)/\U$1/g;
73	$_;
74	}
75
76	sub tolc($) {
77	local $_ = shift;
78	s/(?<=[a-z])(?=[A-Z])/_/g;
79	lc $_;
80	}
81
82	=item $meta = Net::FCP::parse_metadata $string
83
84	Parse a metadata string and return it.
85
86	The metadata will be a hashref with key C<version> (containing
87	the mandatory version header entries).
88
89	All other headers are represented by arrayrefs (they can be repeated).
90
91	Since this is confusing, here is a rather verbose example of a parsed
92	manifest:
93
94	(
95	version => { revision => 1 },
96	document => [
97	{
98	"info.format" => "image/jpeg",
99	name => "background.jpg",
100	"redirect.target" => "freenet:CHK\@ZcagI,ra726bSw"
101	},
102	{
103	"info.format" => "text/html",
104	name => ".next",
105	"redirect.target" => "freenet:SSK\@ilUPAgM/TFEE/3"
106	},
107	{
108	"info.format" => "text/html",
109	"redirect.target" => "freenet:CHK\@8M8Po8ucwI,8xA"
110	}
111	]
112	)
113
114	=cut
115
116	sub parse_metadata {
117	my $meta;
118
119	my $data = shift;
120	if ($data =~ /^Version\015?\012/gc) {
121	my $hdr = $meta->{version} = {};
122
123	for (;;) {
124	while ($data =~ /\G([^=\015\012]+)=([^\015\012]*)\015?\012/gc) {
125	my ($k, $v) = ($1, $2);
126	my @p = split /\./, tolc $k, 3;
127
128	$hdr->{$p[0]} = $v if @p == 1; # lamest code I ever wrote
129	$hdr->{$p[0]}{$p[1]} = $v if @p == 2;
130	$hdr->{$p[0]}{$p[1]}{$p[3]} = $v if @p == 3;
131	die "FATAL: 4+ dot metadata" if @p >= 4;
132	}
133
134	if ($data =~ /\GEndPart\015?\012/gc) {
135	# nop
136	} elsif ($data =~ /\GEnd\015?\012/gc) {
137	last;
138	} elsif ($data =~ /\G([A-Za-z0-9.\-]+)\015?\012/gcs) {
139	push @{$meta->{tolc $1}}, $hdr = {};
140	} elsif ($data =~ /\G(.*)/gcs) {
141	die "metadata format error ($1)";
142	}
143	}
144	}
145
146	#$meta->{tail} = substr $data, pos $data;
147
148	$meta;
149	}
150
151	=item $fcp = new Net::FCP [host => $host][, port => $port]	74	=item $fcp = new Net::FCP [host => $host][, port => $port][, progress => \&cb]
152		75
153	Create a new virtual FCP connection to the given host and port (default	76	Create a new virtual FCP connection to the given host and port (default
154	127.0.0.1:8481, or the environment variables C<FREDHOST> and C<FREDPORT>).	77	127.0.0.1:8481, or the environment variables C<FREDHOST> and C<FREDPORT>).
155		78
156	Connections are virtual because no persistent physical connection is	79	Connections are virtual because no persistent physical connection is
157	established. However, the existance of the node is checked by executing a	80	established.
158	C<ClientHello> transaction.	81
		82	You can install a progress callback that is being called with the Net::FCP
		83	object, a txn object, the type of the transaction and the attributes. Use
		84	it like this:
		85
		86	sub progress_cb {
		87	my ($self, $txn, $type, $attr) = @_;
		88
		89	warn "progress<$txn,$type," . (join ":", %$attr) . ">\n";
		90	}
159		91
160	=cut	92	=cut
161		93
162	sub new {	94	sub new {
163	my $class = shift;	95	my $class = shift;
164	my $self = bless { @_ }, $class;	96	my $self = bless { @_ }, $class;
165		97
166	$self->{host} \|\|= $ENV{FREDHOST} \|\| "127.0.0.1";	98	$self->{host} \|\|= $ENV{FREDHOST} \|\| "127.0.0.1";
167	$self->{port} \|\|= $ENV{FREDPORT} \|\| 8481;	99	$self->{port} \|\|= $ENV{FREDPORT} \|\| 8481;
168		100
169	#$self->{nodehello} = $self->client_hello
170	# or croak "unable to get nodehello from node\n";
171
172	$self;	101	$self;
173	}	102	}
174		103
175	sub progress {	104	sub progress {
176	my ($self, $txn, $type, $attr) = @_;	105	my ($self, $txn, $type, $attr) = @_;
177	warn "progress<$txn,$type," . (join ":", %$attr) . ">\n";
178	}
179		106
		107	$self->{progress}->($self, $txn, $type, $attr)
		108	if $self->{progress};
		109	}
		110
180	=item $txn = $fcp->txn(type => attr => val,...)	111	=item $txn = $fcp->txn (type => attr => val,...)
181		112
182	The low-level interface to transactions. Don't use it.	113	The low-level interface to transactions. Don't use it unless you have
183		114	"special needs". Instead, use predefiend transactions like this:
184	Here are some examples of using transactions:
185		115
186	The blocking case, no (visible) transactions involved:	116	The blocking case, no (visible) transactions involved:
187		117
188	my $nodehello = $fcp->client_hello;	118	my $nodehello = $fcp->client_hello;
189		119
…		…
208	sub txn {	138	sub txn {
209	my ($self, $type, %attr) = @_;	139	my ($self, $type, %attr) = @_;
210		140
211	$type = touc $type;	141	$type = touc $type;
212		142
213	my $txn = "Net::FCP::Txn::$type"->new(fcp => $self, type => tolc $type, attr => \%attr);	143	my $txn = "Net::FCP::Txn::$type"->new (fcp => $self, type => tolc $type, attr => \%attr);
214		144
215	$txn;	145	$txn;
216	}	146	}
217		147
218	sub _txn($&) {	148	{ # transactions
		149
		150	my $txn = sub {
219	my ($name, $sub) = @_;	151	my ($name, $sub) = @_;
220	*{"$name\_txn"} = $sub;	152	*{"txn_$name"} = $sub;
221	*{$name} = sub { $sub->(@_)->result };	153	*{$name} = sub { $sub->(@_)->result };
222	}	154	};
223		155
224	=item $txn = $fcp->txn_client_hello	156	=item $txn = $fcp->txn_client_hello
225		157
226	=item $nodehello = $fcp->client_hello	158	=item $nodehello = $fcp->client_hello
227		159
…		…
233	protocol => "1.2",	165	protocol => "1.2",
234	}	166	}
235		167
236	=cut	168	=cut
237		169
238	_txn client_hello => sub {	170	$txn->(client_hello => sub {
239	my ($self) = @_;	171	my ($self) = @_;
240		172
241	$self->txn ("client_hello");	173	$self->txn ("client_hello");
242	};	174	});
243		175
244	=item $txn = $fcp->txn_client_info	176	=item $txn = $fcp->txn_client_info
245		177
246	=item $nodeinfo = $fcp->client_info	178	=item $nodeinfo = $fcp->client_info
247		179
…		…
271	routing_time => "a5",	203	routing_time => "a5",
272	}	204	}
273		205
274	=cut	206	=cut
275		207
276	_txn client_info => sub {	208	$txn->(client_info => sub {
277	my ($self) = @_;	209	my ($self) = @_;
278		210
279	$self->txn ("client_info");	211	$self->txn ("client_info");
280	};	212	});
281		213
282	=item $txn = $fcp->txn_generate_chk ($metadata, $data)	214	=item $txn = $fcp->txn_generate_chk ($metadata, $data[, $cipher])
283		215
284	=item $uri = $fcp->generate_chk ($metadata, $data)	216	=item $uri = $fcp->generate_chk ($metadata, $data[, $cipher])
285		217
286	Creates a new CHK, given the metadata and data. UNTESTED.	218	Calculates a CHK, given the metadata and data. C<$cipher> is either
		219	C<Rijndael> or C<Twofish>, with the latter being the default.
287		220
288	=cut	221	=cut
289		222
290	_txn generate_chk => sub {	223	$txn->(generate_chk => sub {
291	my ($self, $metadata, $data) = @_;	224	my ($self, $metadata, $data, $cipher) = @_;
292		225
293	$self->txn (generate_chk => data => "$data$metadata", metadata_length => length $metadata);	226	$metadata = Net::FCP::Metadata::build_metadata $metadata;
		227
		228	$self->txn (generate_chk =>
		229	data => "$metadata$data",
		230	metadata_length => xeh length $metadata,
		231	cipher => $cipher \|\| "Twofish");
294	};	232	});
295		233
296	=item $txn = $fcp->txn_generate_svk_pair	234	=item $txn = $fcp->txn_generate_svk_pair
297		235
298	=item ($public, $private) = @{ $fcp->generate_svk_pair }	236	=item ($public, $private, $crypto) = @{ $fcp->generate_svk_pair }
299		237
300	Creates a new SVK pair. Returns an arrayref.	238	Creates a new SVK pair. Returns an arrayref with the public key, the
		239	private key and a crypto key, which is just additional entropy.
301		240
302	[	241	[
303	"hKs0-WDQA4pVZyMPKNFsK1zapWY",	242	"acLx4dux9fvvABH15Gk6~d3I-yw",
304	"ZnmvMITaTXBMFGl4~jrjuyWxOWg"	243	"cPoDkDMXDGSMM32plaPZDhJDxSs",
		244	"BH7LXCov0w51-y9i~BoB3g",
305	]	245	]
306		246
307	=cut	247	A private key (for inserting) can be constructed like this:
308		248
		249	SSK@<private_key>,<crypto_key>/<name>
		250
		251	It can be used to insert data. The corresponding public key looks like this:
		252
		253	SSK@<public_key>PAgM,<crypto_key>/<name>
		254
		255	Watch out for the C<PAgM>-part!
		256
		257	=cut
		258
309	_txn generate_svk_pair => sub {	259	$txn->(generate_svk_pair => sub {
310	my ($self) = @_;	260	my ($self) = @_;
311		261
312	$self->txn ("generate_svk_pair");	262	$self->txn ("generate_svk_pair");
313	};	263	});
314		264
315	=item $txn = $fcp->txn_insert_private_key ($private)	265	=item $txn = $fcp->txn_invert_private_key ($private)
316		266
317	=item $uri = $fcp->insert_private_key ($private)	267	=item $public = $fcp->invert_private_key ($private)
318		268
319	Inserts a private key. $private can be either an insert URI (must start	269	Inverts a private key (returns the public key). C<$private> can be either
320	with freenet:SSK@) or a raw private key (i.e. the private value you get back	270	an insert URI (must start with C<freenet:SSK@>) or a raw private key (i.e.
321	from C<generate_svk_pair>).	271	the private value you get back from C<generate_svk_pair>).
322		272
323	Returns the public key.	273	Returns the public key.
324		274
325	UNTESTED.
326
327	=cut	275	=cut
328		276
329	_txn insert_private_key => sub {	277	$txn->(invert_private_key => sub {
330	my ($self, $privkey) = @_;	278	my ($self, $privkey) = @_;
331		279
332	$self->txn (invert_private_key => private => $privkey);	280	$self->txn (invert_private_key => private => $privkey);
333	};	281	});
334		282
335	=item $txn = $fcp->txn_get_size ($uri)	283	=item $txn = $fcp->txn_get_size ($uri)
336		284
337	=item $length = $fcp->get_size ($uri)	285	=item $length = $fcp->get_size ($uri)
338		286
339	Finds and returns the size (rounded up to the nearest power of two) of the	287	Finds and returns the size (rounded up to the nearest power of two) of the
340	given document.	288	given document.
341		289
342	UNTESTED.
343
344	=cut	290	=cut
345		291
346	_txn get_size => sub {	292	$txn->(get_size => sub {
347	my ($self, $uri) = @_;	293	my ($self, $uri) = @_;
348		294
349	$self->txn (get_size => URI => $uri);	295	$self->txn (get_size => URI => $uri);
350	};	296	});
351		297
352	=item $txn = $fcp->txn_client_get ($uri [, $htl = 15 [, $removelocal = 0]])	298	=item $txn = $fcp->txn_client_get ($uri [, $htl = 15 [, $removelocal = 0]])
353		299
354	=item ($metadata, $data) = @{ $fcp->client_get ($uri, $htl, $removelocal)	300	=item ($metadata, $data) = @{ $fcp->client_get ($uri, $htl, $removelocal)
355		301
356	Fetches a (small, as it should fit into memory) file from	302	Fetches a (small, as it should fit into memory) key content block from
357	freenet. C<$meta> is the metadata (as returned by C<parse_metadata> or	303	freenet. C<$meta> is a C<Net::FCP::Metadata> object or C<undef>).
358	C<undef>).
359		304
360	Due to the overhead, a better method to download big files should be used.	305	The C<$uri> should begin with C<freenet:>, but the scheme is currently
		306	added, if missing.
361		307
362	my ($meta, $data) = @{	308	my ($meta, $data) = @{
363	$fcp->client_get (	309	$fcp->client_get (
364	"freenet:CHK@hdXaxkwZ9rA8-SidT0AN-bniQlgPAwI,XdCDmBuGsd-ulqbLnZ8v~w"	310	"freenet:CHK@hdXaxkwZ9rA8-SidT0AN-bniQlgPAwI,XdCDmBuGsd-ulqbLnZ8v~w"
365	)	311	)
366	};	312	};
367		313
368	=cut	314	=cut
369		315
370	_txn client_get => sub {	316	$txn->(client_get => sub {
371	my ($self, $uri, $htl, $removelocal) = @_;	317	my ($self, $uri, $htl, $removelocal) = @_;
372		318
373	$self->txn (client_get => URI => $uri, hops_to_live => ($htl \|\| 15), remove_local_key => $removelocal ? "true" : "false");	319	$uri =~ s/^freenet://; $uri = "freenet:$uri";
		320
		321	$self->txn (client_get => URI => $uri, hops_to_live => xeh (defined $htl ? $htl : 15),
		322	remove_local_key => $removelocal ? "true" : "false");
374	};	323	});
375		324
376	=item MISSING: ClientPut	325	=item $txn = $fcp->txn_client_put ($uri, $metadata, $data, $htl, $removelocal)
		326
		327	=item my $uri = $fcp->client_put ($uri, $metadata, $data, $htl, $removelocal);
		328
		329	Insert a new key. If the client is inserting a CHK, the URI may be
		330	abbreviated as just CHK@. In this case, the node will calculate the
		331	CHK. If the key is a private SSK key, the node will calculcate the public
		332	key and the resulting public URI.
		333
		334	C<$meta> can be a hash reference (same format as returned by
		335	C<Net::FCP::parse_metadata>) or a string.
		336
		337	The result is an arrayref with the keys C<uri>, C<public_key> and C<private_key>.
		338
		339	=cut
		340
		341	$txn->(client_put => sub {
		342	my ($self, $uri, $metadata, $data, $htl, $removelocal) = @_;
		343
		344	$metadata = Net::FCP::Metadata::build_metadata $metadata;
		345	$uri =~ s/^freenet://; $uri = "freenet:$uri";
		346
		347	$self->txn (client_put => URI => $uri,
		348	hops_to_live => xeh (defined $htl ? $htl : 15),
		349	remove_local_key => $removelocal ? "true" : "false",
		350	data => "$metadata$data", metadata_length => xeh length $metadata);
		351	});
		352
		353	} # transactions
377		354
378	=back	355	=back
379		356
380	=head2 THE Net::FCP::Txn CLASS	357	=head2 THE Net::FCP::Txn CLASS
381		358
382	All requests (or transactions) are executed in a asynchroneous way (LIE:	359	All requests (or transactions) are executed in a asynchronous way. For
383	uploads are blocking). For each request, a C<Net::FCP::Txn> object is	360	each request, a C<Net::FCP::Txn> object is created (worse: a tcp
384	created (worse: a tcp connection is created, too).	361	connection is created, too).
385		362
386	For each request there is actually a different subclass (and it's possible	363	For each request there is actually a different subclass (and it's possible
387	to subclass these, although of course not documented).	364	to subclass these, although of course not documented).
388		365
389	The most interesting method is C<result>.	366	The most interesting method is C<result>.
…		…
405		382
406	sub new {	383	sub new {
407	my $class = shift;	384	my $class = shift;
408	my $self = bless { @_ }, $class;	385	my $self = bless { @_ }, $class;
409		386
410	$self->{signal} = $EVENT->new_signal;	387	$self->{signal} = AnyEvent->condvar;
411		388
412	$self->{fcp}{txn}{$self} = $self;	389	$self->{fcp}{txn}{$self} = $self;
413		390
414	my $attr = "";	391	my $attr = "";
415	my $data = delete $self->{attr}{data};	392	my $data = delete $self->{attr}{data};
…		…
417	while (my ($k, $v) = each %{$self->{attr}}) {	394	while (my ($k, $v) = each %{$self->{attr}}) {
418	$attr .= (Net::FCP::touc $k) . "=$v\012"	395	$attr .= (Net::FCP::touc $k) . "=$v\012"
419	}	396	}
420		397
421	if (defined $data) {	398	if (defined $data) {
422	$attr .= "DataLength=" . (length $data) . "\012";	399	$attr .= sprintf "DataLength=%x\012", length $data;
423	$data = "Data\012$data";	400	$data = "Data\012$data";
424	} else {	401	} else {
425	$data = "EndMessage\012";	402	$data = "EndMessage\012";
426	}	403	}
427		404
…		…
434	and !$!{EINPROGRESS}	411	and !$!{EINPROGRESS}
435	and Carp::croak "FCP::txn: unable to connect to $self->{fcp}{host}:$self->{fcp}{port}: $!\n";	412	and Carp::croak "FCP::txn: unable to connect to $self->{fcp}{host}:$self->{fcp}{port}: $!\n";
436		413
437	$self->{sbuf} =	414	$self->{sbuf} =
438	"\x00\x00\x00\x02"	415	"\x00\x00\x00\x02"
439	. Net::FCP::touc $self->{type}	416	. (Net::FCP::touc $self->{type})
440	. "\012$attr$data";	417	. "\012$attr$data";
441		418
442	#$fh->shutdown (1); # freenet buggy?, well, it's java...	419	#shutdown $fh, 1; # freenet buggy?, well, it's java...
443		420
444	$self->{fh} = $fh;	421	$self->{fh} = $fh;
445		422
446	$self->{w} = $EVENT->new_from_fh ($fh)->cb(sub { $self->fh_ready_w })->poll(0, 1, 1);	423	$self->{w} = AnyEvent->io (fh => $fh, poll => 'w', cb => sub { $self->fh_ready_w });
447		424
448	$self;	425	$self;
449	}	426	}
450		427
451	=item $txn = $txn->cb ($coderef)	428	=item $txn = $txn->cb ($coderef)
…		…
485	my ($self, $data) = @_;	462	my ($self, $data) = @_;
486	$self->{userdata} = $data;	463	$self->{userdata} = $data;
487	$self;	464	$self;
488	}	465	}
489		466
		467	=item $txn->cancel (%attr)
		468
		469	Cancels the operation with a C<cancel> exception and the given attributes
		470	(consider at least giving the attribute C<reason>).
		471
		472	UNTESTED.
		473
		474	=cut
		475
		476	sub cancel {
		477	my ($self, %attr) = @_;
		478	$self->throw (Net::FCP::Exception->new (cancel => { %attr }));
		479	$self->set_result;
		480	$self->eof;
		481	}
		482
490	sub fh_ready_w {	483	sub fh_ready_w {
491	my ($self) = @_;	484	my ($self) = @_;
492		485
493	my $len = syswrite $self->{fh}, $self->{sbuf};	486	my $len = syswrite $self->{fh}, $self->{sbuf};
494		487
495	if ($len > 0) {	488	if ($len > 0) {
496	substr $self->{sbuf}, 0, $len, "";	489	substr $self->{sbuf}, 0, $len, "";
497	unless (length $self->{sbuf}) {	490	unless (length $self->{sbuf}) {
498	fcntl $self->{fh}, F_SETFL, 0;	491	fcntl $self->{fh}, F_SETFL, 0;
499	$self->{w}->cb(sub { $self->fh_ready_r })->poll (1, 0, 1);	492	undef $self->{w}; #d# #workaround for buggy Tk versions
		493	$self->{w} = AnyEvent->io (fh => $self->{fh}, poll => 'r', cb => sub { $self->fh_ready_r });
500	}	494	}
501	} elsif (defined $len) {	495	} elsif (defined $len) {
502	$self->throw (Net::FCP::Exception->new (network_error => { reason => "unexpected end of file while writing" }));	496	$self->throw (Net::FCP::Exception->new (network_error => { reason => "unexpected end of file while writing" }));
503	} else {	497	} else {
504	$self->throw (Net::FCP::Exception->new (network_error => { reason => "$!" }));	498	$self->throw (Net::FCP::Exception->new (network_error => { reason => "$!" }));
…		…
532	} else {	526	} else {
533	$self->eof;	527	$self->eof;
534	}	528	}
535	}	529	}
536		530
537	sub rcv_data {
538	my ($self, $chunk) = @_;
539
540	$self->{data} .= $chunk;
541
542	$self->progress ("data", { chunk => length $chunk, total => length $self->{data}, end => $self->{datalength} });
543	}
544
545	sub rcv {	531	sub rcv {
546	my ($self, $type, $attr) = @_;	532	my ($self, $type, $attr) = @_;
547		533
548	$type = Net::FCP::tolc $type;	534	$type = Net::FCP::tolc $type;
549		535
…		…
557	}	543	}
558		544
559	# used as a default exception thrower	545	# used as a default exception thrower
560	sub rcv_throw_exception {	546	sub rcv_throw_exception {
561	my ($self, $attr, $type) = @_;	547	my ($self, $attr, $type) = @_;
562	$self->throw (new Net::FCP::Exception $type, $attr);	548	$self->throw (Net::FCP::Exception->new ($type, $attr));
563	}	549	}
564		550
565	*rcv_failed = \&Net::FCP::Txn::rcv_throw_exception;	551	*rcv_failed = \&Net::FCP::Txn::rcv_throw_exception;
566	*rcv_format_error = \&Net::FCP::Txn::rcv_throw_exception;	552	*rcv_format_error = \&Net::FCP::Txn::rcv_throw_exception;
567		553
568	sub throw {	554	sub throw {
569	my ($self, $exc) = @_;	555	my ($self, $exc) = @_;
570		556
571	$self->{exception} = $exc;	557	$self->{exception} = $exc;
572	$self->set_result (1);	558	$self->set_result;
573	$self->eof; # must be last to avoid loops	559	$self->eof; # must be last to avoid loops
574	}	560	}
575		561
576	sub set_result {	562	sub set_result {
577	my ($self, $result) = @_;	563	my ($self, $result) = @_;
578		564
579	unless (exists $self->{result}) {	565	unless (exists $self->{result}) {
580	$self->{result} = $result;	566	$self->{result} = $result;
581	$self->{cb}->($self) if exists $self->{cb};	567	$self->{cb}->($self) if exists $self->{cb};
582	$self->{signal}->send;	568	$self->{signal}->broadcast;
583	}	569	}
584	}	570	}
585		571
586	sub eof {	572	sub eof {
587	my ($self) = @_;	573	my ($self) = @_;
…		…
589	delete $self->{w};	575	delete $self->{w};
590	delete $self->{fh};	576	delete $self->{fh};
591		577
592	delete $self->{fcp}{txn}{$self};	578	delete $self->{fcp}{txn}{$self};
593		579
594	$self->set_result; # just in case	580	unless (exists $self->{result}) {
		581	$self->throw (Net::FCP::Exception->new (short_data => {
		582	reason => "unexpected eof or internal node error",
		583	}));
		584	}
595	}	585	}
596		586
597	sub progress {	587	sub progress {
598	my ($self, $type, $attr) = @_;	588	my ($self, $type, $attr) = @_;
		589
599	$self->{fcp}->progress ($self, $type, $attr);	590	$self->{fcp}->progress ($self, $type, $attr);
600	}	591	}
601		592
602	=item $result = $txn->result	593	=item $result = $txn->result
603		594
604	Waits until a result is available and then returns it.	595	Waits until a result is available and then returns it.
605		596
606	This waiting is (depending on your event model) not very efficient, as it	597	This waiting is (depending on your event model) not very efficient, as it
607	is done outside the "mainloop".	598	is done outside the "mainloop". The biggest problem, however, is that it's
		599	blocking one thread of execution. Try to use the callback mechanism, if
		600	possible, and call result from within the callback (or after is has been
		601	run), as then no waiting is necessary.
608		602
609	=cut	603	=cut
610		604
611	sub result {	605	sub result {
612	my ($self) = @_;	606	my ($self) = @_;
…		…
643	use base Net::FCP::Txn;	637	use base Net::FCP::Txn;
644		638
645	sub rcv_success {	639	sub rcv_success {
646	my ($self, $attr) = @_;	640	my ($self, $attr) = @_;
647		641
648	$self->set_result ($attr);	642	$self->set_result ($attr->{uri});
649	}	643	}
650		644
651	package Net::FCP::Txn::GenerateSVKPair;	645	package Net::FCP::Txn::GenerateSVKPair;
652		646
653	use base Net::FCP::Txn;	647	use base Net::FCP::Txn;
654		648
655	sub rcv_success {	649	sub rcv_success {
656	my ($self, $attr) = @_;	650	my ($self, $attr) = @_;
657
658	$self->set_result ([$attr->{PublicKey}, $attr->{PrivateKey}]);	651	$self->set_result ([$attr->{public_key}, $attr->{private_key}, $attr->{crypto_key}]);
659	}	652	}
660		653
661	package Net::FCP::Txn::InvertPrivateKey;	654	package Net::FCP::Txn::InvertPrivateKey;
662		655
663	use base Net::FCP::Txn;	656	use base Net::FCP::Txn;
664		657
665	sub rcv_success {	658	sub rcv_success {
666	my ($self, $attr) = @_;	659	my ($self, $attr) = @_;
667
668	$self->set_result ($attr->{PublicKey});	660	$self->set_result ($attr->{public_key});
669	}	661	}
670		662
671	package Net::FCP::Txn::GetSize;	663	package Net::FCP::Txn::GetSize;
672		664
673	use base Net::FCP::Txn;	665	use base Net::FCP::Txn;
674		666
675	sub rcv_success {	667	sub rcv_success {
676	my ($self, $attr) = @_;	668	my ($self, $attr) = @_;
677
678	$self->set_result ($attr->{Length});	669	$self->set_result (hex $attr->{length});
679	}	670	}
680		671
681	package Net::FCP::Txn::GetPut;	672	package Net::FCP::Txn::GetPut;
682		673
683	# base class for get and put	674	# base class for get and put
684		675
685	use base Net::FCP::Txn;	676	use base Net::FCP::Txn;
686		677
687	*rcv_uri_error = \&Net::FCP::Txn::rcv_throw_exception;	678	*rcv_uri_error = \&Net::FCP::Txn::rcv_throw_exception;
688	*rcv_route_not_found = \&Net::FCP::Txn::rcv_throw_exception;	679	*rcv_route_not_found = \&Net::FCP::Txn::rcv_throw_exception;
689		680
690	sub rcv_restarted {	681	sub rcv_restarted {
691	my ($self, $attr, $type) = @_;	682	my ($self, $attr, $type) = @_;
692		683
693	delete $self->{datalength};	684	delete $self->{datalength};
…		…
701		692
702	use base Net::FCP::Txn::GetPut;	693	use base Net::FCP::Txn::GetPut;
703		694
704	*rcv_data_not_found = \&Net::FCP::Txn::rcv_throw_exception;	695	*rcv_data_not_found = \&Net::FCP::Txn::rcv_throw_exception;
705		696
		697	sub rcv_data {
		698	my ($self, $chunk) = @_;
		699
		700	$self->{data} .= $chunk;
		701
		702	$self->progress ("data", { chunk => length $chunk, received => length $self->{data}, total => $self->{datalength} });
		703
		704	if ($self->{datalength} == length $self->{data}) {
		705	my $data = delete $self->{data};
		706	my $meta = new Net::FCP::Metadata (substr $data, 0, $self->{metalength}, "");
		707
		708	$self->set_result ([$meta, $data]);
		709	$self->eof;
		710	}
		711	}
		712
706	sub rcv_data_found {	713	sub rcv_data_found {
707	my ($self, $attr, $type) = @_;	714	my ($self, $attr, $type) = @_;
708		715
709	$self->progress ($type, $attr);	716	$self->progress ($type, $attr);
710		717
711	$self->{datalength} = hex $attr->{data_length};	718	$self->{datalength} = hex $attr->{data_length};
712	$self->{metalength} = hex $attr->{metadata_length};	719	$self->{metalength} = hex $attr->{metadata_length};
713	}	720	}
714		721
715	sub eof {
716	my ($self) = @_;
717
718	if ($self->{datalength} == length $self->{data}) {
719	my $data = delete $self->{data};
720	my $meta = Net::FCP::parse_metadata substr $data, 0, $self->{metalength}, "";
721
722	$self->set_result ([$meta, $data]);
723	} elsif (!exists $self->{result}) {
724	$self->throw (Net::FCP::Exception->new (short_data => {
725	reason => "unexpected eof or internal node error",
726	received => length $self->{data},
727	expected => $self->{datalength},
728	}));
729	}
730	}
731
732	package Net::FCP::Txn::ClientPut;	722	package Net::FCP::Txn::ClientPut;
733		723
734	use base Net::FCP::Txn::GetPut;	724	use base Net::FCP::Txn::GetPut;
735		725
736	*rcv_size_error = \&Net::FCP::Txn::rcv_throw_exception;	726	*rcv_size_error = \&Net::FCP::Txn::rcv_throw_exception;
737	*rcv_key_collision = \&Net::FCP::Txn::rcv_throw_exception;
738		727
739	sub rcv_pending {	728	sub rcv_pending {
740	my ($self, $attr, $type) = @_;	729	my ($self, $attr, $type) = @_;
741	$self->progress ($type, $attr);	730	$self->progress ($type, $attr);
742	}	731	}
…		…
744	sub rcv_success {	733	sub rcv_success {
745	my ($self, $attr, $type) = @_;	734	my ($self, $attr, $type) = @_;
746	$self->set_result ($attr);	735	$self->set_result ($attr);
747	}	736	}
748		737
		738	sub rcv_key_collision {
		739	my ($self, $attr, $type) = @_;
		740	$self->set_result ({ key_collision => 1, %$attr });
		741	}
		742
		743	=back
		744
		745	=head2 The Net::FCP::Exception CLASS
		746
		747	Any unexpected (non-standard) responses that make it impossible to return
		748	the advertised result will result in an exception being thrown when the
		749	C<result> method is called.
		750
		751	These exceptions are represented by objects of this class.
		752
		753	=over 4
		754
		755	=cut
		756
749	package Net::FCP::Exception;	757	package Net::FCP::Exception;
750		758
751	use overload	759	use overload
752	'""' => sub {	760	'""' => sub {
753	"Net::FCP::Exception<<$_[0][0]," . (join ":", %{$_[0][1]}) . ">>\n";	761	"Net::FCP::Exception<<$_[0][0]," . (join ":", %{$_[0][1]}) . ">>";
754	};	762	};
		763
		764	=item $exc = new Net::FCP::Exception $type, \%attr
		765
		766	Create a new exception object of the given type (a string like
		767	C<route_not_found>), and a hashref containing additional attributes
		768	(usually the attributes of the message causing the exception).
		769
		770	=cut
755		771
756	sub new {	772	sub new {
757	my ($class, $type, $attr) = @_;	773	my ($class, $type, $attr) = @_;
758		774
759	bless [Net::FCP::tolc $type, { %$attr }], $class;	775	bless [Net::FCP::tolc $type, { %$attr }], $class;
760	}	776	}
761		777
		778	=item $exc->type([$type])
		779
		780	With no arguments, returns the exception type. Otherwise a boolean
		781	indicating wether the exception is of the given type is returned.
		782
		783	=cut
		784
		785	sub type {
		786	my ($self, $type) = @_;
		787
		788	@_ >= 2
		789	? $self->[0] eq $type
		790	: $self->[0];
		791	}
		792
		793	=item $exc->attr([$attr])
		794
		795	With no arguments, returns the attributes. Otherwise the named attribute
		796	value is returned.
		797
		798	=cut
		799
		800	sub attr {
		801	my ($self, $attr) = @_;
		802
		803	@_ >= 2
		804	? $self->[1]{$attr}
		805	: $self->[1];
		806	}
		807
762	=back	808	=back
763		809
764	=head1 SEE ALSO	810	=head1 SEE ALSO
765		811
766	L<http://freenet.sf.net>.	812	L<http://freenet.sf.net>.
767		813
768	=head1 BUGS	814	=head1 BUGS
769		815
770	=head1 AUTHOR	816	=head1 AUTHOR
771		817
772	Marc Lehmann <pcg@goof.com>	818	Marc Lehmann <schmorp@schmorp.de>
773	http://www.goof.com/pcg/marc/	819	http://home.schmorp.de/
774		820
775	=cut	821	=cut
776		822
777	1;	823	1
778		824

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing Net-FCP/FCP.pm (file contents): Revision 1.13 by root, Wed Sep 10 05:06:16 2003 UTC vs. Revision 1.36 by root, Thu Dec 1 22:07:40 2005 UTC

Diff Legend

Comparing Net-FCP/FCP.pm (file contents):
Revision 1.13 by root, Wed Sep 10 05:06:16 2003 UTC vs.
Revision 1.36 by root, Thu Dec 1 22:07:40 2005 UTC