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

Comparing Net-FCP/FCP.pm (file contents):
Revision 1.2 by root, Sun Sep 7 23:20:20 2003 UTC vs.
Revision 1.39 by root, Tue Nov 28 15:18:17 2006 UTC

…		…
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		18
		19	The module uses L<AnyEvent> to find a suitable Event module.
		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 works only with the Event module (alkthough the event	24	data, it currently falls short of what it should provide (intelligent uri
23	mechanism is fully pluggable).	25	following, splitfile downloads, healing...)
		26
		27	=head2 IMPORT TAGS
		28
		29	Nothing much can be "imported" from this module right now.
		30
		31	=head2 FREENET BASICS
		32
		33	Ok, this section will not explain any freenet basics to you, just some
		34	problems I found that you might want to avoid:
		35
		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
24		54
25	=head2 THE Net::FCP CLASS	55	=head2 THE Net::FCP CLASS
26		56
27	=over 4	57	=over 4
28		58
29	=cut	59	=cut
30		60
31	package Net::FCP;	61	package Net::FCP;
32		62
33	use Carp;	63	use Carp;
34	use IO::Socket::INET;
35		64
36	$VERSION = 0.01;	65	$VERSION = '1.0';
37		66
38	sub event_reg_cb {	67	no warnings;
39	my ($obj) = @_;
40	require Event;
41		68
42	$obj->{eventdata} = Event->io (	69	use AnyEvent;
43	fd => $obj->{fh},
44	poll => 'r',
45	cb => sub {
46	$obj->fh_ready;
47	},
48	);
49	}
50		70
51	sub event_unreg_cb {	71	use Net::FCP::Metadata;
52	$_[0]{eventdata}	72	use Net::FCP::Util qw(tolc touc xeh);
53	and (delete $_[0]{eventdata})->cancel;
54	}
55		73
56	sub event_wait_cb {
57	Event::one_event();
58	}
59
60	$regcb = \&event_reg_cb;
61	$unregcb = \&event_unreg_cb;
62	$waitcb = \&event_wait_cb;
63
64	sub touc($) {
65	local $_ = shift;
66	1 while s/((?:^\|_)(?:svk\|chk\|uri)(?:_\|$))/\U$1/;
67	s/(?:^\|_)(.)/\U$1/g;
68	$_;
69	}
70
71	sub tolc($) {
72	local $_ = shift;
73	s/(?<=[a-z])(?=[A-Z])/_/g;
74	lc $_;
75	}
76
77	=item $fcp = new Net::FCP [host => $host][, port => $port]	74	=item $fcp = new Net::FCP [host => $host][, port => $port][, progress => \&cb]
78		75
79	Create a new virtual FCP connection to the given host and port (default	76	Create a new virtual FCP connection to the given host and port (default
80	127.0.0.1:8481).	77	127.0.0.1:8481, or the environment variables C<FREDHOST> and C<FREDPORT>).
81		78
82	Connections are virtual because no persistent physical connection is	79	Connections are virtual because no persistent physical connection is
83	established. However, the existance of the node is checked by executing a	80	established.
84	C<ClientHello> transaction.	81
		82	You can install a progress callback that is being called with the Net::FCP
		83	object, a txn object, the type of the transaction and the attributes. Use
		84	it like this:
		85
		86	sub progress_cb {
		87	my ($self, $txn, $type, $attr) = @_;
		88
		89	warn "progress<$txn,$type," . (join ":", %$attr) . ">\n";
		90	}
85		91
86	=cut	92	=cut
87		93
88	sub new {	94	sub new {
89	my $class = shift;	95	my $class = shift;
90	my $self = bless { @_ }, $class;	96	my $self = bless { @_ }, $class;
91		97
92	$self->{host} \|\|= "127.0.0.1";	98	$self->{host} \|\|= $ENV{FREDHOST} \|\| "127.0.0.1";
93	$self->{port} \|\|= 8481;	99	$self->{port} \|\|= $ENV{FREDPORT} \|\| 8481;
94
95	$self->{nodehello} = $self->txn("ClientHello")->result
96	or croak "unable to get nodehello from node\n";
97		100
98	$self;	101	$self;
99	}	102	}
100		103
		104	sub progress {
		105	my ($self, $txn, $type, $attr) = @_;
		106
		107	$self->{progress}->($self, $txn, $type, $attr)
		108	if $self->{progress};
		109	}
		110
101	=item $txn = $fcp->txn(type => attr => val,...)	111	=item $txn = $fcp->txn (type => attr => val,...)
102		112
103	The low-level interface to transactions. Don't use it.	113	The low-level interface to transactions. Don't use it unless you have
		114	"special needs". Instead, use predefiend transactions like this:
		115
		116	The blocking case, no (visible) transactions involved:
		117
		118	my $nodehello = $fcp->client_hello;
		119
		120	A transaction used in a blocking fashion:
		121
		122	my $txn = $fcp->txn_client_hello;
		123	...
		124	my $nodehello = $txn->result;
		125
		126	Or shorter:
		127
		128	my $nodehello = $fcp->txn_client_hello->result;
		129
		130	Setting callbacks:
		131
		132	$fcp->txn_client_hello->cb(
		133	sub { my $nodehello => $_[0]->result }
		134	);
104		135
105	=cut	136	=cut
106		137
107	sub txn {	138	sub txn {
108	my ($self, $type, %attr) = @_;	139	my ($self, $type, %attr) = @_;
109		140
110	$type = touc $type;	141	$type = touc $type;
111		142
112	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);
113		144
114	$txn;	145	$txn;
115	}	146	}
116		147
117	sub _txn($&) {	148	{ # transactions
		149
		150	my $txn = sub {
118	my ($name, $sub) = @_;	151	my ($name, $sub) = @_;
119	*{"$name\_txn"} = $sub;	152	*{"txn_$name"} = $sub;
120	*{$name} = sub { $sub->(@_)->result };	153	*{$name} = sub { $sub->(@_)->result };
121	}	154	};
122		155
123	=item $txn = $fcp->txn_client_hello	156	=item $txn = $fcp->txn_client_hello
124		157
125	=item $nodehello = $fcp->client_hello	158	=item $nodehello = $fcp->client_hello
126		159
127	Executes a ClientHello request and returns it's results.	160	Executes a ClientHello request and returns it's results.
128		161
129	{	162	{
130	max_file_size => "5f5e100",	163	max_file_size => "5f5e100",
		164	node => "Fred,0.6,1.46,7050"
131	protocol => "1.2",	165	protocol => "1.2",
132	node => "Fred,0.6,1.46,7050"
133	}	166	}
134		167
135	=cut	168	=cut
136		169
137	_txn client_hello => sub {	170	$txn->(client_hello => sub {
138	my ($self) = @_;	171	my ($self) = @_;
139		172
140	$self->txn ("client_hello");	173	$self->txn ("client_hello");
141	};	174	});
142		175
143	=item $txn = $fcp->txn_client_info	176	=item $txn = $fcp->txn_client_info
144		177
145	=item $nodeinfo = $fcp->client_info	178	=item $nodeinfo = $fcp->client_info
146		179
147	Executes a ClientInfo request and returns it's results.	180	Executes a ClientInfo request and returns it's results.
148		181
149	{	182	{
150	max_file_size => "5f5e100",
151	datastore_max => "2540be400",
152	node_port => 369,
153	java_name => "Java HotSpot(_T_M) Server VM",
154	operating_system_version => "2.4.20",
155	estimated_load => 52,
156	free_memory => "5cc0148",
157	datastore_free => "5ce03400",
158	node_address => "1.2.3.4",
159	active_jobs => "1f",	183	active_jobs => "1f",
160	allocated_memory => "bde0000",	184	allocated_memory => "bde0000",
161	architecture => "i386",	185	architecture => "i386",
		186	available_threads => 17,
		187	datastore_free => "5ce03400",
		188	datastore_max => "2540be400",
		189	datastore_used => "1f72bb000",
		190	estimated_load => 52,
		191	free_memory => "5cc0148",
		192	is_transient => "false",
		193	java_name => "Java HotSpot(_T_M) Server VM",
		194	java_vendor => "http://www.blackdown.org/",
		195	java_version => "Blackdown-1.4.1-01",
		196	least_recent_timestamp => "f41538b878",
		197	max_file_size => "5f5e100",
		198	most_recent_timestamp => "f77e2cc520"
		199	node_address => "1.2.3.4",
		200	node_port => 369,
		201	operating_system => "Linux",
		202	operating_system_version => "2.4.20",
162	routing_time => "a5",	203	routing_time => "a5",
163	least_recent_timestamp => "f41538b878",
164	available_threads => 17,
165	datastore_used => "1f72bb000",
166	java_version => "Blackdown-1.4.1-01",
167	is_transient => "false",
168	operating_system => "Linux",
169	java_vendor => "http://www.blackdown.org/",
170	most_recent_timestamp => "f77e2cc520"
171	}	204	}
172		205
173	=cut	206	=cut
174		207
175	_txn client_info => sub {	208	$txn->(client_info => sub {
176	my ($self) = @_;	209	my ($self) = @_;
177		210
178	$self->txn ("client_info");	211	$self->txn ("client_info");
179	};	212	});
180		213
181	=item $txn = $fcp->txn_generate_chk ($metadata, $data)	214	=item $txn = $fcp->txn_generate_chk ($metadata, $data[, $cipher])
182		215
183	=item $uri = $fcp->generate_chk ($metadata, $data)	216	=item $uri = $fcp->generate_chk ($metadata, $data[, $cipher])
184		217
185	Creates a new CHK, given the metadata and data. UNTESTED.	218	Calculates a CHK, given the metadata and data. C<$cipher> is either
		219	C<Rijndael> or C<Twofish>, with the latter being the default.
186		220
187	=cut	221	=cut
188		222
189	_txn generate_chk => sub {	223	$txn->(generate_chk => sub {
190	my ($self, $metadata, $data) = @_;	224	my ($self, $metadata, $data, $cipher) = @_;
191		225
192	$self->txn (generate_chk => data => "$data$metadata", meta_data_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");
193	};	232	});
194		233
195	=item $txn = $fcp->txn_generate_svk_pair	234	=item $txn = $fcp->txn_generate_svk_pair
196		235
197	=item ($public, $private) = @{ $fcp->generate_svk_pair }	236	=item ($public, $private, $crypto) = @{ $fcp->generate_svk_pair }
198		237
199	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.
200		240
201	[	241	[
202	"hKs0-WDQA4pVZyMPKNFsK1zapWY",	242	"acLx4dux9fvvABH15Gk6~d3I-yw",
203	"ZnmvMITaTXBMFGl4~jrjuyWxOWg"	243	"cPoDkDMXDGSMM32plaPZDhJDxSs",
		244	"BH7LXCov0w51-y9i~BoB3g",
204	]	245	]
205		246
206	=cut	247	A private key (for inserting) can be constructed like this:
207		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
208	_txn generate_svk_pair => sub {	259	$txn->(generate_svk_pair => sub {
209	my ($self) = @_;	260	my ($self) = @_;
210		261
211	$self->txn ("generate_svk_pair");	262	$self->txn ("generate_svk_pair");
212	};	263	});
213		264
214	=item $txn = $fcp->txn_insert_private_key ($private)	265	=item $txn = $fcp->txn_invert_private_key ($private)
215		266
216	=item $uri = $fcp->insert_private_key ($private)	267	=item $public = $fcp->invert_private_key ($private)
217		268
218	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
219	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.
220	from C<generate_svk_pair>).	271	the private value you get back from C<generate_svk_pair>).
221		272
222	Returns the public key.	273	Returns the public key.
223		274
224	UNTESTED.
225
226	=cut	275	=cut
227		276
228	_txn insert_private_key => sub {	277	$txn->(invert_private_key => sub {
229	my ($self, $privkey) = @_;	278	my ($self, $privkey) = @_;
230		279
231	$self->txn (invert_private_key => private => $privkey);	280	$self->txn (invert_private_key => private => $privkey);
232	};	281	});
233		282
234	=item $txn = $fcp->txn_get_size ($uri)	283	=item $txn = $fcp->txn_get_size ($uri)
235		284
236	=item $length = $fcp->get_size ($uri)	285	=item $length = $fcp->get_size ($uri)
237		286
238	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
239	given document.	288	given document.
240		289
241	UNTESTED.
242
243	=cut	290	=cut
244		291
245	_txn get_size => sub {	292	$txn->(get_size => sub {
246	my ($self, $uri) = @_;	293	my ($self, $uri) = @_;
247		294
248	$self->txn (get_size => URI => $uri);	295	$self->txn (get_size => URI => $uri);
249	};	296	});
250		297
251	=item MISSING: ClientGet, ClientPut	298	=item $txn = $fcp->txn_client_get ($uri [, $htl = 15 [, $removelocal = 0]])
		299
		300	=item ($metadata, $data) = @{ $fcp->client_get ($uri, $htl, $removelocal)
		301
		302	Fetches a (small, as it should fit into memory) key content block from
		303	freenet. C<$meta> is a C<Net::FCP::Metadata> object or C<undef>).
		304
		305	The C<$uri> should begin with C<freenet:>, but the scheme is currently
		306	added, if missing.
		307
		308	my ($meta, $data) = @{
		309	$fcp->client_get (
		310	"freenet:CHK@hdXaxkwZ9rA8-SidT0AN-bniQlgPAwI,XdCDmBuGsd-ulqbLnZ8v~w"
		311	)
		312	};
		313
		314	=cut
		315
		316	$txn->(client_get => sub {
		317	my ($self, $uri, $htl, $removelocal) = @_;
		318
		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");
		323	});
		324
		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
252		354
253	=back	355	=back
254		356
255	=head2 THE Net::FCP::Txn CLASS	357	=head2 THE Net::FCP::Txn CLASS
256		358
257	All requests (or transactions) are executed in a asynchroneous way (LIE:	359	All requests (or transactions) are executed in a asynchronous way. For
258	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
259	created (worse: a tcp connection is created, too).	361	connection is created, too).
260		362
261	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
262	to subclass these, although of course not documented).	364	to subclass these, although of course not documented).
263		365
264	The most interesting method is C<result>.	366	The most interesting method is C<result>.
…		…
266	=over 4	368	=over 4
267		369
268	=cut	370	=cut
269		371
270	package Net::FCP::Txn;	372	package Net::FCP::Txn;
		373
		374	use Fcntl;
		375	use Socket;
271		376
272	=item new arg => val,...	377	=item new arg => val,...
273		378
274	Creates a new C<Net::FCP::Txn> object. Not normally used.	379	Creates a new C<Net::FCP::Txn> object. Not normally used.
275		380
…		…
277		382
278	sub new {	383	sub new {
279	my $class = shift;	384	my $class = shift;
280	my $self = bless { @_ }, $class;	385	my $self = bless { @_ }, $class;
281		386
		387	$self->{signal} = AnyEvent->condvar;
		388
		389	$self->{fcp}{txn}{$self} = $self;
		390
282	my $attr = "";	391	my $attr = "";
283	my $data = delete $self->{attr}{data};	392	my $data = delete $self->{attr}{data};
284		393
285	while (my ($k, $v) = each %{$self->{attr}}) {	394	while (my ($k, $v) = each %{$self->{attr}}) {
286	$attr .= (Net::FCP::touc $k) . "=$v\012"	395	$attr .= (Net::FCP::touc $k) . "=$v\012"
287	}	396	}
288		397
289	if (defined $data) {	398	if (defined $data) {
290	$attr .= "DataLength=" . (length $data) . "\012";	399	$attr .= sprintf "DataLength=%x\012", length $data;
291	$data = "Data\012$data";	400	$data = "Data\012$data";
292	} else {	401	} else {
293	$data = "EndMessage\012";	402	$data = "EndMessage\012";
294	}	403	}
295		404
296	my $fh = new IO::Socket::INET	405	socket my $fh, PF_INET, SOCK_STREAM, 0
297	PeerHost => $self->{fcp}{host},	406	or Carp::croak "unable to create new tcp socket: $!";
298	PeerPort => $self->{fcp}{port}
299	or Carp::croak "FCP::txn: unable to connect to $self->{fcp}{host}:$self->{fcp}{port}: $!\n";
300
301	binmode $fh, ":raw";	407	binmode $fh, ":raw";
		408	fcntl $fh, F_SETFL, O_NONBLOCK;
		409	connect $fh, (sockaddr_in $self->{fcp}{port}, inet_aton $self->{fcp}{host});
		410	# and Carp::croak "FCP::txn: unable to connect to $self->{fcp}{host}:$self->{fcp}{port}: $!\n";
302		411
303	if (0) {	412	$self->{sbuf} =
304	print	413	"\x00\x00\x00\x02"
305	Net::FCP::touc $self->{type}, "\012",
306	$attr,
307	$data, "\012";
308	}
309
310	print $fh
311	"\x00\x00", "\x00\x02", # SESSID, PRESID
312	Net::FCP::touc $self->{type}, "\012",	414	. (Net::FCP::touc $self->{type})
313	$attr,	415	. "\012$attr$data";
314	$data;
315		416
316	#$fh->shutdown (1); # freenet buggy?, well, it's java...	417	#shutdown $fh, 1; # freenet buggy?, well, it's java...
317		418
318	$self->{fh} = $fh;	419	$self->{fh} = $fh;
319		420
320	$Net::FCP::regcb->($self);	421	$self->{w} = AnyEvent->io (fh => $fh, poll => 'w', cb => sub { $self->fh_ready_w });
321		422
322	$self;	423	$self;
323	}	424	}
324		425
		426	=item $txn = $txn->cb ($coderef)
		427
		428	Sets a callback to be called when the request is finished. The coderef
		429	will be called with the txn as it's sole argument, so it has to call
		430	C<result> itself.
		431
		432	Returns the txn object, useful for chaining.
		433
		434	Example:
		435
		436	$fcp->txn_client_get ("freenet:CHK....")
		437	->userdata ("ehrm")
		438	->cb(sub {
		439	my $data = shift->result;
		440	});
		441
		442	=cut
		443
		444	sub cb($$) {
		445	my ($self, $cb) = @_;
		446	$self->{cb} = $cb;
		447	$self;
		448	}
		449
		450	=item $txn = $txn->userdata ([$userdata])
		451
		452	Set user-specific data. This is useful in progress callbacks. The data can be accessed
		453	using C<< $txn->{userdata} >>.
		454
		455	Returns the txn object, useful for chaining.
		456
		457	=cut
		458
		459	sub userdata($$) {
		460	my ($self, $data) = @_;
		461	$self->{userdata} = $data;
		462	$self;
		463	}
		464
		465	=item $txn->cancel (%attr)
		466
		467	Cancels the operation with a C<cancel> exception and the given attributes
		468	(consider at least giving the attribute C<reason>).
		469
		470	UNTESTED.
		471
		472	=cut
		473
		474	sub cancel {
		475	my ($self, %attr) = @_;
		476	$self->throw (Net::FCP::Exception->new (cancel => { %attr }));
		477	$self->set_result;
		478	$self->eof;
		479	}
		480
325	sub fh_ready {	481	sub fh_ready_w {
326	my ($self) = @_;	482	my ($self) = @_;
327		483
		484	my $len = syswrite $self->{fh}, $self->{sbuf};
		485
		486	if ($len > 0) {
		487	substr $self->{sbuf}, 0, $len, "";
		488	unless (length $self->{sbuf}) {
		489	fcntl $self->{fh}, F_SETFL, 0;
		490	$self->{w} = AnyEvent->io (fh => $self->{fh}, poll => 'r', cb => sub { $self->fh_ready_r });
		491	}
		492	} elsif (defined $len) {
		493	$self->throw (Net::FCP::Exception->new (network_error => { reason => "unexpected end of file while writing" }));
		494	} else {
		495	$self->throw (Net::FCP::Exception->new (network_error => { reason => "$!" }));
		496	}
		497	}
		498
		499	sub fh_ready_r {
		500	my ($self) = @_;
		501
328	if (sysread $self->{fh}, $self->{buf}, 65536, length $self->{buf}) {	502	if (sysread $self->{fh}, $self->{buf}, 16384 + 1024, length $self->{buf}) {
329	for (;;) {	503	for (;;) {
330	if ($self->{datalen}) {	504	if ($self->{datalen}) {
		505	#warn "expecting new datachunk $self->{datalen}, got ".(length $self->{buf})."\n";#d#
331	if (length $self->{buf} >= $self->{datalen}) {	506	if (length $self->{buf} >= $self->{datalen}) {
332	$self->recv_data (substr $self->{buf}, 0, $self->{datalen}, "");	507	$self->rcv_data (substr $self->{buf}, 0, delete $self->{datalen}, "");
333	} else {	508	} else {
334	last;	509	last;
335	}	510	}
336	} elsif ($self->{buf} =~ s/^DataChunk\015?\012Length=(\d+)\015?\012Data\015?\012//) {	511	} elsif ($self->{buf} =~ s/^DataChunk\015?\012Length=([0-9a-fA-F]+)\015?\012Data\015?\012//) {
337	$self->{datalen} = $1;	512	$self->{datalen} = hex $1;
		513	#warn "expecting new datachunk $self->{datalen}\n";#d#
338	} elsif ($self->{buf} =~ s/^([a-zA-Z]+)\015?\012(.*?)\015?\012EndMessage\015?\012//s) {	514	} elsif ($self->{buf} =~ s/^([a-zA-Z]+)\015?\012(?:(.+?)\015?\012)?EndMessage\015?\012//s) {
339	$self->rcv ($1, {	515	$self->rcv ($1, {
340	map { my ($a, $b) = split /=/, $_, 2; ((Net::FCP::tolc $a), $b) }	516	map { my ($a, $b) = split /=/, $_, 2; ((Net::FCP::tolc $a), $b) }
341	split /\015?\012/, $2	517	split /\015?\012/, $2
342	});	518	});
343	} else {	519	} else {
344	last;	520	last;
345	}	521	}
346	}	522	}
347	} else {	523	} else {
348	$Net::FCP::unregcb->($self);
349	delete $self->{fh};
350	$self->eof;	524	$self->eof;
351	}	525	}
352	}
353
354	sub rcv_data {
355	my ($self, $chunk) = @_;
356	}	526	}
357		527
358	sub rcv {	528	sub rcv {
359	my ($self, $type, $attr) = @_;	529	my ($self, $type, $attr) = @_;
360		530
361	$type = Net::FCP::tolc $type;	531	$type = Net::FCP::tolc $type;
		532
		533	#use PApp::Util; warn PApp::Util::dumpval [$type, $attr];
362		534
363	if (my $method = $self->can("rcv_$type")) {	535	if (my $method = $self->can("rcv_$type")) {
364	$method->($self, $attr, $type);	536	$method->($self, $attr, $type);
365	} else {	537	} else {
366	warn "received unexpected reply type '$type' for '$self->{type}', ignoring\n";	538	warn "received unexpected reply type '$type' for '$self->{type}', ignoring\n";
367	$self->eof;	539	}
		540	}
		541
		542	# used as a default exception thrower
		543	sub rcv_throw_exception {
		544	my ($self, $attr, $type) = @_;
		545	$self->throw (Net::FCP::Exception->new ($type, $attr));
		546	}
		547
		548	*rcv_failed = \&Net::FCP::Txn::rcv_throw_exception;
		549	*rcv_format_error = \&Net::FCP::Txn::rcv_throw_exception;
		550
		551	sub throw {
		552	my ($self, $exc) = @_;
		553
		554	$self->{exception} = $exc;
		555	$self->set_result;
		556	$self->eof; # must be last to avoid loops
		557	}
		558
		559	sub set_result {
		560	my ($self, $result) = @_;
		561
		562	unless (exists $self->{result}) {
		563	$self->{result} = $result;
		564	$self->{cb}->($self) if exists $self->{cb};
		565	$self->{signal}->broadcast;
368	}	566	}
369	}	567	}
370		568
371	sub eof {	569	sub eof {
372	my ($self, $result) = @_;	570	my ($self) = @_;
373		571
374	$self->{result} = $result unless exists $self->{result};	572	delete $self->{w};
		573	delete $self->{fh};
		574
		575	delete $self->{fcp}{txn}{$self};
		576
		577	unless (exists $self->{result}) {
		578	$self->throw (Net::FCP::Exception->new (short_data => {
		579	reason => "unexpected eof or internal node error",
		580	}));
		581	}
		582	}
		583
		584	sub progress {
		585	my ($self, $type, $attr) = @_;
		586
		587	$self->{fcp}->progress ($self, $type, $attr);
375	}	588	}
376		589
377	=item $result = $txn->result	590	=item $result = $txn->result
378		591
379	Waits until a result is available and then returns it.	592	Waits until a result is available and then returns it.
380		593
381	This waiting is (depending on your event modul) not very efficient, as it	594	This waiting is (depending on your event model) not very efficient, as it
382	is done outside the "mainloop".	595	is done outside the "mainloop". The biggest problem, however, is that it's
		596	blocking one thread of execution. Try to use the callback mechanism, if
		597	possible, and call result from within the callback (or after is has been
		598	run), as then no waiting is necessary.
383		599
384	=cut	600	=cut
385		601
386	sub result {	602	sub result {
387	my ($self) = @_;	603	my ($self) = @_;
388		604
389	$Net::FCP::waitcb->() while !exists $self->{result};	605	$self->{signal}->wait while !exists $self->{result};
		606
		607	die $self->{exception} if $self->{exception};
390		608
391	return $self->{result};	609	return $self->{result};
392	}
393
394	sub DESTROY {
395	$Net::FCP::unregcb->($_[0]);
396	}	610	}
397		611
398	package Net::FCP::Txn::ClientHello;	612	package Net::FCP::Txn::ClientHello;
399		613
400	use base Net::FCP::Txn;	614	use base Net::FCP::Txn;
401		615
402	sub rcv_node_hello {	616	sub rcv_node_hello {
403	my ($self, $attr) = @_;	617	my ($self, $attr) = @_;
404		618
405	$self->eof ($attr);	619	$self->set_result ($attr);
406	}	620	}
407		621
408	package Net::FCP::Txn::ClientInfo;	622	package Net::FCP::Txn::ClientInfo;
409		623
410	use base Net::FCP::Txn;	624	use base Net::FCP::Txn;
411		625
412	sub rcv_node_info {	626	sub rcv_node_info {
413	my ($self, $attr) = @_;	627	my ($self, $attr) = @_;
414		628
415	$self->eof ($attr);	629	$self->set_result ($attr);
416	}	630	}
417		631
418	package Net::FCP::Txn::GenerateCHK;	632	package Net::FCP::Txn::GenerateCHK;
419		633
420	use base Net::FCP::Txn;	634	use base Net::FCP::Txn;
421		635
422	sub rcv_success {	636	sub rcv_success {
423	my ($self, $attr) = @_;	637	my ($self, $attr) = @_;
424		638
425	$self->eof ($attr);	639	$self->set_result ($attr->{uri});
426	}	640	}
427		641
428	package Net::FCP::Txn::GenerateSVKPair;	642	package Net::FCP::Txn::GenerateSVKPair;
429		643
430	use base Net::FCP::Txn;	644	use base Net::FCP::Txn;
431		645
432	sub rcv_success {	646	sub rcv_success {
433	my ($self, $attr) = @_;	647	my ($self, $attr) = @_;
434		648	$self->set_result ([$attr->{public_key}, $attr->{private_key}, $attr->{crypto_key}]);
435	$self->eof ([$attr->{PublicKey}, $attr->{PrivateKey}]);
436	}	649	}
437		650
438	package Net::FCP::Txn::InvertPrivateKey;	651	package Net::FCP::Txn::InvertPrivateKey;
439		652
440	use base Net::FCP::Txn;	653	use base Net::FCP::Txn;
441		654
442	sub rcv_success {	655	sub rcv_success {
443	my ($self, $attr) = @_;	656	my ($self, $attr) = @_;
444
445	$self->eof ($attr->{PublicKey});	657	$self->set_result ($attr->{public_key});
446	}	658	}
447		659
448	package Net::FCP::Txn::GetSize;	660	package Net::FCP::Txn::GetSize;
449		661
450	use base Net::FCP::Txn;	662	use base Net::FCP::Txn;
451		663
452	sub rcv_success {	664	sub rcv_success {
453	my ($self, $attr) = @_;	665	my ($self, $attr) = @_;
454
455	$self->eof ($attr->{Length});	666	$self->set_result (hex $attr->{length});
		667	}
		668
		669	package Net::FCP::Txn::GetPut;
		670
		671	# base class for get and put
		672
		673	use base Net::FCP::Txn;
		674
		675	*rcv_uri_error = \&Net::FCP::Txn::rcv_throw_exception;
		676	*rcv_route_not_found = \&Net::FCP::Txn::rcv_throw_exception;
		677
		678	sub rcv_restarted {
		679	my ($self, $attr, $type) = @_;
		680
		681	delete $self->{datalength};
		682	delete $self->{metalength};
		683	delete $self->{data};
		684
		685	$self->progress ($type, $attr);
		686	}
		687
		688	package Net::FCP::Txn::ClientGet;
		689
		690	use base Net::FCP::Txn::GetPut;
		691
		692	*rcv_data_not_found = \&Net::FCP::Txn::rcv_throw_exception;
		693
		694	sub rcv_data {
		695	my ($self, $chunk) = @_;
		696
		697	$self->{data} .= $chunk;
		698
		699	$self->progress ("data", { chunk => length $chunk, received => length $self->{data}, total => $self->{datalength} });
		700
		701	if ($self->{datalength} == length $self->{data}) {
		702	my $data = delete $self->{data};
		703	my $meta = new Net::FCP::Metadata (substr $data, 0, $self->{metalength}, "");
		704
		705	$self->set_result ([$meta, $data]);
		706	$self->eof;
		707	}
		708	}
		709
		710	sub rcv_data_found {
		711	my ($self, $attr, $type) = @_;
		712
		713	$self->progress ($type, $attr);
		714
		715	$self->{datalength} = hex $attr->{data_length};
		716	$self->{metalength} = hex $attr->{metadata_length};
		717	}
		718
		719	package Net::FCP::Txn::ClientPut;
		720
		721	use base Net::FCP::Txn::GetPut;
		722
		723	*rcv_size_error = \&Net::FCP::Txn::rcv_throw_exception;
		724
		725	sub rcv_pending {
		726	my ($self, $attr, $type) = @_;
		727	$self->progress ($type, $attr);
		728	}
		729
		730	sub rcv_success {
		731	my ($self, $attr, $type) = @_;
		732	$self->set_result ($attr);
		733	}
		734
		735	sub rcv_key_collision {
		736	my ($self, $attr, $type) = @_;
		737	$self->set_result ({ key_collision => 1, %$attr });
456	}	738	}
457		739
458	=back	740	=back
459		741
		742	=head2 The Net::FCP::Exception CLASS
		743
		744	Any unexpected (non-standard) responses that make it impossible to return
		745	the advertised result will result in an exception being thrown when the
		746	C<result> method is called.
		747
		748	These exceptions are represented by objects of this class.
		749
		750	=over 4
		751
		752	=cut
		753
		754	package Net::FCP::Exception;
		755
		756	use overload
		757	'""' => sub {
		758	"Net::FCP::Exception<<$_[0][0]," . (join ":", %{$_[0][1]}) . ">>";
		759	};
		760
		761	=item $exc = new Net::FCP::Exception $type, \%attr
		762
		763	Create a new exception object of the given type (a string like
		764	C<route_not_found>), and a hashref containing additional attributes
		765	(usually the attributes of the message causing the exception).
		766
		767	=cut
		768
		769	sub new {
		770	my ($class, $type, $attr) = @_;
		771
		772	bless [Net::FCP::tolc $type, { %$attr }], $class;
		773	}
		774
		775	=item $exc->type([$type])
		776
		777	With no arguments, returns the exception type. Otherwise a boolean
		778	indicating wether the exception is of the given type is returned.
		779
		780	=cut
		781
		782	sub type {
		783	my ($self, $type) = @_;
		784
		785	@_ >= 2
		786	? $self->[0] eq $type
		787	: $self->[0];
		788	}
		789
		790	=item $exc->attr([$attr])
		791
		792	With no arguments, returns the attributes. Otherwise the named attribute
		793	value is returned.
		794
		795	=cut
		796
		797	sub attr {
		798	my ($self, $attr) = @_;
		799
		800	@_ >= 2
		801	? $self->[1]{$attr}
		802	: $self->[1];
		803	}
		804
		805	=back
		806
460	=head1 SEE ALSO	807	=head1 SEE ALSO
461		808
462	L<http://freenet.sf.net>.	809	L<http://freenet.sf.net>.
463		810
464	=head1 BUGS	811	=head1 BUGS
465		812
466	=head1 AUTHOR	813	=head1 AUTHOR
467		814
468	Marc Lehmann <pcg@goof.com>	815	Marc Lehmann <schmorp@schmorp.de>
469	http://www.goof.com/pcg/marc/	816	http://home.schmorp.de/
470		817
471	=cut	818	=cut
472		819
473	1;	820	1
474		821

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Comparing Net-FCP/FCP.pm (file contents): Revision 1.2 by root, Sun Sep 7 23:20:20 2003 UTC vs. Revision 1.39 by root, Tue Nov 28 15:18:17 2006 UTC

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Comparing Net-FCP/FCP.pm (file contents):
Revision 1.2 by root, Sun Sep 7 23:20:20 2003 UTC vs.
Revision 1.39 by root, Tue Nov 28 15:18:17 2006 UTC