… | |
… | |
2 | |
2 | |
3 | no warnings; |
3 | no warnings; |
4 | use strict; |
4 | use strict; |
5 | |
5 | |
6 | use AnyEvent (); |
6 | use AnyEvent (); |
7 | use AnyEvent::Util (); |
7 | use AnyEvent::Util qw(WSAWOULDBLOCK); |
8 | use Scalar::Util (); |
8 | use Scalar::Util (); |
9 | use Carp (); |
9 | use Carp (); |
10 | use Fcntl (); |
10 | use Fcntl (); |
11 | use Errno qw/EAGAIN EINTR/; |
11 | use Errno qw/EAGAIN EINTR/; |
12 | |
12 | |
13 | =head1 NAME |
13 | =head1 NAME |
14 | |
14 | |
15 | AnyEvent::Handle - non-blocking I/O on filehandles via AnyEvent |
15 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
16 | |
16 | |
17 | =cut |
17 | =cut |
18 | |
18 | |
19 | our $VERSION = '0.02'; |
19 | our $VERSION = '0.04'; |
20 | |
20 | |
21 | =head1 SYNOPSIS |
21 | =head1 SYNOPSIS |
22 | |
22 | |
23 | use AnyEvent; |
23 | use AnyEvent; |
24 | use AnyEvent::Handle; |
24 | use AnyEvent::Handle; |
25 | |
25 | |
26 | my $cv = AnyEvent->condvar; |
26 | my $cv = AnyEvent->condvar; |
27 | |
27 | |
28 | my $ae_fh = AnyEvent::Handle->new (fh => \*STDIN); |
28 | my $handle = |
29 | |
|
|
30 | #TODO |
|
|
31 | |
|
|
32 | # or use the constructor to pass the callback: |
|
|
33 | |
|
|
34 | my $ae_fh2 = |
|
|
35 | AnyEvent::Handle->new ( |
29 | AnyEvent::Handle->new ( |
36 | fh => \*STDIN, |
30 | fh => \*STDIN, |
37 | on_eof => sub { |
31 | on_eof => sub { |
38 | $cv->broadcast; |
32 | $cv->broadcast; |
39 | }, |
33 | }, |
40 | #TODO |
|
|
41 | ); |
34 | ); |
42 | |
35 | |
43 | $cv->wait; |
36 | # send some request line |
|
|
37 | $handle->push_write ("getinfo\015\012"); |
|
|
38 | |
|
|
39 | # read the response line |
|
|
40 | $handle->push_read (line => sub { |
|
|
41 | my ($handle, $line) = @_; |
|
|
42 | warn "read line <$line>\n"; |
|
|
43 | $cv->send; |
|
|
44 | }); |
|
|
45 | |
|
|
46 | $cv->recv; |
44 | |
47 | |
45 | =head1 DESCRIPTION |
48 | =head1 DESCRIPTION |
46 | |
49 | |
47 | This module is a helper module to make it easier to do event-based I/O on |
50 | This module is a helper module to make it easier to do event-based I/O on |
48 | filehandles (and sockets, see L<AnyEvent::Socket> for an easy way to make |
51 | filehandles. For utility functions for doing non-blocking connects and accepts |
49 | non-blocking resolves and connects). |
52 | on sockets see L<AnyEvent::Util>. |
50 | |
53 | |
51 | In the following, when the documentation refers to of "bytes" then this |
54 | In the following, when the documentation refers to of "bytes" then this |
52 | means characters. As sysread and syswrite are used for all I/O, their |
55 | means characters. As sysread and syswrite are used for all I/O, their |
53 | treatment of characters applies to this module as well. |
56 | treatment of characters applies to this module as well. |
54 | |
57 | |
… | |
… | |
70 | The filehandle this L<AnyEvent::Handle> object will operate on. |
73 | The filehandle this L<AnyEvent::Handle> object will operate on. |
71 | |
74 | |
72 | NOTE: The filehandle will be set to non-blocking (using |
75 | NOTE: The filehandle will be set to non-blocking (using |
73 | AnyEvent::Util::fh_nonblocking). |
76 | AnyEvent::Util::fh_nonblocking). |
74 | |
77 | |
75 | =item on_eof => $cb->($self) [MANDATORY] |
78 | =item on_eof => $cb->($self) |
76 | |
79 | |
77 | Set the callback to be called on EOF. |
80 | Set the callback to be called on EOF. |
78 | |
81 | |
|
|
82 | While not mandatory, it is highly recommended to set an eof callback, |
|
|
83 | otherwise you might end up with a closed socket while you are still |
|
|
84 | waiting for data. |
|
|
85 | |
79 | =item on_error => $cb->($self) |
86 | =item on_error => $cb->($self) |
80 | |
87 | |
81 | This is the fatal error callback, that is called when, well, a fatal error |
88 | This is the fatal error callback, that is called when, well, a fatal error |
82 | ocurs, such as not being able to resolve the hostname, failure to connect |
89 | occurs, such as not being able to resolve the hostname, failure to connect |
83 | or a read error. |
90 | or a read error. |
84 | |
91 | |
85 | The object will not be in a usable state when this callback has been |
92 | The object will not be in a usable state when this callback has been |
86 | called. |
93 | called. |
87 | |
94 | |
88 | On callback entrance, the value of C<$!> contains the operating system |
95 | On callback entrance, the value of C<$!> contains the operating system |
89 | error (or C<ENOSPC> or C<EPIPE>). |
96 | error (or C<ENOSPC>, C<EPIPE> or C<EBADMSG>). |
90 | |
97 | |
91 | While not mandatory, it is I<highly> recommended to set this callback, as |
98 | While not mandatory, it is I<highly> recommended to set this callback, as |
92 | you will not be notified of errors otherwise. The default simply calls |
99 | you will not be notified of errors otherwise. The default simply calls |
93 | die. |
100 | die. |
94 | |
101 | |
… | |
… | |
96 | |
103 | |
97 | This sets the default read callback, which is called when data arrives |
104 | This sets the default read callback, which is called when data arrives |
98 | and no read request is in the queue. |
105 | and no read request is in the queue. |
99 | |
106 | |
100 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
107 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
101 | method or acces sthe C<$self->{rbuf}> member directly. |
108 | method or access the C<$self->{rbuf}> member directly. |
102 | |
109 | |
103 | When an EOF condition is detected then AnyEvent::Handle will first try to |
110 | When an EOF condition is detected then AnyEvent::Handle will first try to |
104 | feed all the remaining data to the queued callbacks and C<on_read> before |
111 | feed all the remaining data to the queued callbacks and C<on_read> before |
105 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
112 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
106 | error will be raised (with C<$!> set to C<EPIPE>). |
113 | error will be raised (with C<$!> set to C<EPIPE>). |
… | |
… | |
133 | |
140 | |
134 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
141 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
135 | buffer: If the write reaches this size or gets even samller it is |
142 | buffer: If the write reaches this size or gets even samller it is |
136 | considered empty. |
143 | considered empty. |
137 | |
144 | |
|
|
145 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
|
|
146 | |
|
|
147 | When this parameter is given, it enables TLS (SSL) mode, that means it |
|
|
148 | will start making tls handshake and will transparently encrypt/decrypt |
|
|
149 | data. |
|
|
150 | |
|
|
151 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
|
|
152 | automatically when you try to create a TLS handle). |
|
|
153 | |
|
|
154 | For the TLS server side, use C<accept>, and for the TLS client side of a |
|
|
155 | connection, use C<connect> mode. |
|
|
156 | |
|
|
157 | You can also provide your own TLS connection object, but you have |
|
|
158 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
|
|
159 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
|
|
160 | AnyEvent::Handle. |
|
|
161 | |
|
|
162 | See the C<starttls> method if you need to start TLs negotiation later. |
|
|
163 | |
|
|
164 | =item tls_ctx => $ssl_ctx |
|
|
165 | |
|
|
166 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
|
|
167 | (unless a connection object was specified directly). If this parameter is |
|
|
168 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
|
|
169 | |
138 | =back |
170 | =back |
139 | |
171 | |
140 | =cut |
172 | =cut |
141 | |
173 | |
142 | sub new { |
174 | sub new { |
… | |
… | |
146 | |
178 | |
147 | $self->{fh} or Carp::croak "mandatory argument fh is missing"; |
179 | $self->{fh} or Carp::croak "mandatory argument fh is missing"; |
148 | |
180 | |
149 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
181 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
150 | |
182 | |
151 | $self->on_eof ((delete $self->{on_eof} ) or Carp::croak "mandatory argument on_eof is missing"); |
183 | if ($self->{tls}) { |
|
|
184 | require Net::SSLeay; |
|
|
185 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
|
|
186 | } |
152 | |
187 | |
|
|
188 | $self->on_eof (delete $self->{on_eof} ) if $self->{on_eof}; |
153 | $self->on_error (delete $self->{on_error}) if $self->{on_error}; |
189 | $self->on_error (delete $self->{on_error}) if $self->{on_error}; |
154 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
190 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
155 | $self->on_read (delete $self->{on_read} ) if $self->{on_read}; |
191 | $self->on_read (delete $self->{on_read} ) if $self->{on_read}; |
156 | |
192 | |
157 | $self->start_read; |
193 | $self->start_read; |
… | |
… | |
176 | } |
212 | } |
177 | |
213 | |
178 | if ($self->{on_error}) { |
214 | if ($self->{on_error}) { |
179 | $self->{on_error}($self); |
215 | $self->{on_error}($self); |
180 | } else { |
216 | } else { |
181 | die "AnyEvent::Handle uncaught fatal error: $!"; |
217 | Carp::croak "AnyEvent::Handle uncaught fatal error: $!"; |
182 | } |
218 | } |
183 | } |
219 | } |
184 | |
220 | |
185 | =item $fh = $handle->fh |
221 | =item $fh = $handle->fh |
186 | |
222 | |
187 | This method returns the filehandle of the L<AnyEvent::Handle> object. |
223 | This method returns the file handle of the L<AnyEvent::Handle> object. |
188 | |
224 | |
189 | =cut |
225 | =cut |
190 | |
226 | |
191 | sub fh { $_[0]->{fh} } |
227 | sub fh { $_[0]->{fh} } |
192 | |
228 | |
… | |
… | |
220 | for reading. |
256 | for reading. |
221 | |
257 | |
222 | The write queue is very simple: you can add data to its end, and |
258 | The write queue is very simple: you can add data to its end, and |
223 | AnyEvent::Handle will automatically try to get rid of it for you. |
259 | AnyEvent::Handle will automatically try to get rid of it for you. |
224 | |
260 | |
225 | When data could be writtena nd the write buffer is shorter then the low |
261 | When data could be written and the write buffer is shorter then the low |
226 | water mark, the C<on_drain> callback will be invoked. |
262 | water mark, the C<on_drain> callback will be invoked. |
227 | |
263 | |
228 | =over 4 |
264 | =over 4 |
229 | |
265 | |
230 | =item $handle->on_drain ($cb) |
266 | =item $handle->on_drain ($cb) |
… | |
… | |
249 | want (only limited by the available memory), as C<AnyEvent::Handle> |
285 | want (only limited by the available memory), as C<AnyEvent::Handle> |
250 | buffers it independently of the kernel. |
286 | buffers it independently of the kernel. |
251 | |
287 | |
252 | =cut |
288 | =cut |
253 | |
289 | |
254 | sub push_write { |
290 | sub _drain_wbuf { |
255 | my ($self, $data) = @_; |
291 | my ($self) = @_; |
256 | |
292 | |
257 | $self->{wbuf} .= $data; |
293 | if (!$self->{ww} && length $self->{wbuf}) { |
258 | |
|
|
259 | unless ($self->{ww}) { |
|
|
260 | Scalar::Util::weaken $self; |
294 | Scalar::Util::weaken $self; |
261 | my $cb = sub { |
295 | my $cb = sub { |
262 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
296 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
263 | |
297 | |
264 | if ($len > 0) { |
298 | if ($len >= 0) { |
265 | substr $self->{wbuf}, 0, $len, ""; |
299 | substr $self->{wbuf}, 0, $len, ""; |
266 | |
|
|
267 | |
300 | |
268 | $self->{on_drain}($self) |
301 | $self->{on_drain}($self) |
269 | if $self->{low_water_mark} >= length $self->{wbuf} |
302 | if $self->{low_water_mark} >= length $self->{wbuf} |
270 | && $self->{on_drain}; |
303 | && $self->{on_drain}; |
271 | |
304 | |
272 | delete $self->{ww} unless length $self->{wbuf}; |
305 | delete $self->{ww} unless length $self->{wbuf}; |
273 | } elsif ($! != EAGAIN && $! != EINTR) { |
306 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAWOULDBLOCK) { |
274 | $self->error; |
307 | $self->error; |
275 | } |
308 | } |
276 | }; |
309 | }; |
277 | |
310 | |
278 | $self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb); |
311 | $self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb); |
279 | |
312 | |
280 | $cb->($self); |
313 | $cb->($self); |
281 | }; |
314 | }; |
282 | } |
315 | } |
|
|
316 | |
|
|
317 | our %WH; |
|
|
318 | |
|
|
319 | sub register_write_type($$) { |
|
|
320 | $WH{$_[0]} = $_[1]; |
|
|
321 | } |
|
|
322 | |
|
|
323 | sub push_write { |
|
|
324 | my $self = shift; |
|
|
325 | |
|
|
326 | if (@_ > 1) { |
|
|
327 | my $type = shift; |
|
|
328 | |
|
|
329 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
|
|
330 | ->($self, @_); |
|
|
331 | } |
|
|
332 | |
|
|
333 | if ($self->{filter_w}) { |
|
|
334 | $self->{filter_w}->($self, \$_[0]); |
|
|
335 | } else { |
|
|
336 | $self->{wbuf} .= $_[0]; |
|
|
337 | $self->_drain_wbuf; |
|
|
338 | } |
|
|
339 | } |
|
|
340 | |
|
|
341 | =item $handle->push_write (type => @args) |
|
|
342 | |
|
|
343 | =item $handle->unshift_write (type => @args) |
|
|
344 | |
|
|
345 | Instead of formatting your data yourself, you can also let this module do |
|
|
346 | the job by specifying a type and type-specific arguments. |
|
|
347 | |
|
|
348 | Predefined types are (if you have ideas for additional types, feel free to |
|
|
349 | drop by and tell us): |
|
|
350 | |
|
|
351 | =over 4 |
|
|
352 | |
|
|
353 | =item netstring => $string |
|
|
354 | |
|
|
355 | Formats the given value as netstring |
|
|
356 | (http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them). |
|
|
357 | |
|
|
358 | =back |
|
|
359 | |
|
|
360 | =cut |
|
|
361 | |
|
|
362 | register_write_type netstring => sub { |
|
|
363 | my ($self, $string) = @_; |
|
|
364 | |
|
|
365 | sprintf "%d:%s,", (length $string), $string |
|
|
366 | }; |
|
|
367 | |
|
|
368 | =item AnyEvent::Handle::register_write_type type => $coderef->($self, @args) |
|
|
369 | |
|
|
370 | This function (not method) lets you add your own types to C<push_write>. |
|
|
371 | Whenever the given C<type> is used, C<push_write> will invoke the code |
|
|
372 | reference with the handle object and the remaining arguments. |
|
|
373 | |
|
|
374 | The code reference is supposed to return a single octet string that will |
|
|
375 | be appended to the write buffer. |
|
|
376 | |
|
|
377 | Note that this is a function, and all types registered this way will be |
|
|
378 | global, so try to use unique names. |
|
|
379 | |
|
|
380 | =cut |
283 | |
381 | |
284 | ############################################################################# |
382 | ############################################################################# |
285 | |
383 | |
286 | =back |
384 | =back |
287 | |
385 | |
… | |
… | |
362 | =cut |
460 | =cut |
363 | |
461 | |
364 | sub _drain_rbuf { |
462 | sub _drain_rbuf { |
365 | my ($self) = @_; |
463 | my ($self) = @_; |
366 | |
464 | |
|
|
465 | if ( |
|
|
466 | defined $self->{rbuf_max} |
|
|
467 | && $self->{rbuf_max} < length $self->{rbuf} |
|
|
468 | ) { |
|
|
469 | $! = &Errno::ENOSPC; return $self->error; |
|
|
470 | } |
|
|
471 | |
367 | return if $self->{in_drain}; |
472 | return if $self->{in_drain}; |
368 | local $self->{in_drain} = 1; |
473 | local $self->{in_drain} = 1; |
369 | |
474 | |
370 | while (my $len = length $self->{rbuf}) { |
475 | while (my $len = length $self->{rbuf}) { |
371 | no strict 'refs'; |
476 | no strict 'refs'; |
372 | if (my $cb = shift @{ $self->{queue} }) { |
477 | if (my $cb = shift @{ $self->{queue} }) { |
373 | if (!$cb->($self)) { |
478 | unless ($cb->($self)) { |
374 | if ($self->{eof}) { |
479 | if ($self->{eof}) { |
375 | # no progress can be made (not enough data and no data forthcoming) |
480 | # no progress can be made (not enough data and no data forthcoming) |
376 | $! = &Errno::EPIPE; return $self->error; |
481 | $! = &Errno::EPIPE; return $self->error; |
377 | } |
482 | } |
378 | |
483 | |
… | |
… | |
398 | } |
503 | } |
399 | } |
504 | } |
400 | |
505 | |
401 | if ($self->{eof}) { |
506 | if ($self->{eof}) { |
402 | $self->_shutdown; |
507 | $self->_shutdown; |
403 | $self->{on_eof}($self); |
508 | $self->{on_eof}($self) |
|
|
509 | if $self->{on_eof}; |
404 | } |
510 | } |
405 | } |
511 | } |
406 | |
512 | |
407 | =item $handle->on_read ($cb) |
513 | =item $handle->on_read ($cb) |
408 | |
514 | |
… | |
… | |
442 | Append the given callback to the end of the queue (C<push_read>) or |
548 | Append the given callback to the end of the queue (C<push_read>) or |
443 | prepend it (C<unshift_read>). |
549 | prepend it (C<unshift_read>). |
444 | |
550 | |
445 | The callback is called each time some additional read data arrives. |
551 | The callback is called each time some additional read data arrives. |
446 | |
552 | |
447 | It must check wether enough data is in the read buffer already. |
553 | It must check whether enough data is in the read buffer already. |
448 | |
554 | |
449 | If not enough data is available, it must return the empty list or a false |
555 | If not enough data is available, it must return the empty list or a false |
450 | value, in which case it will be called repeatedly until enough data is |
556 | value, in which case it will be called repeatedly until enough data is |
451 | available (or an error condition is detected). |
557 | available (or an error condition is detected). |
452 | |
558 | |
… | |
… | |
454 | interested in (which can be none at all) and return a true value. After returning |
560 | interested in (which can be none at all) and return a true value. After returning |
455 | true, it will be removed from the queue. |
561 | true, it will be removed from the queue. |
456 | |
562 | |
457 | =cut |
563 | =cut |
458 | |
564 | |
|
|
565 | our %RH; |
|
|
566 | |
|
|
567 | sub register_read_type($$) { |
|
|
568 | $RH{$_[0]} = $_[1]; |
|
|
569 | } |
|
|
570 | |
459 | sub push_read { |
571 | sub push_read { |
460 | my ($self, $cb) = @_; |
572 | my $self = shift; |
|
|
573 | my $cb = pop; |
|
|
574 | |
|
|
575 | if (@_) { |
|
|
576 | my $type = shift; |
|
|
577 | |
|
|
578 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
|
|
579 | ->($self, $cb, @_); |
|
|
580 | } |
461 | |
581 | |
462 | push @{ $self->{queue} }, $cb; |
582 | push @{ $self->{queue} }, $cb; |
463 | $self->_drain_rbuf; |
583 | $self->_drain_rbuf; |
464 | } |
584 | } |
465 | |
585 | |
466 | sub unshift_read { |
586 | sub unshift_read { |
467 | my ($self, $cb) = @_; |
587 | my $self = shift; |
|
|
588 | my $cb = pop; |
468 | |
589 | |
|
|
590 | if (@_) { |
|
|
591 | my $type = shift; |
|
|
592 | |
|
|
593 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read") |
|
|
594 | ->($self, $cb, @_); |
|
|
595 | } |
|
|
596 | |
|
|
597 | |
469 | push @{ $self->{queue} }, $cb; |
598 | unshift @{ $self->{queue} }, $cb; |
470 | $self->_drain_rbuf; |
599 | $self->_drain_rbuf; |
471 | } |
600 | } |
472 | |
601 | |
473 | =item $handle->push_read_chunk ($len, $cb->($self, $data)) |
602 | =item $handle->push_read (type => @args, $cb) |
474 | |
603 | |
475 | =item $handle->unshift_read_chunk ($len, $cb->($self, $data)) |
604 | =item $handle->unshift_read (type => @args, $cb) |
476 | |
605 | |
477 | Append the given callback to the end of the queue (C<push_read_chunk>) or |
606 | Instead of providing a callback that parses the data itself you can chose |
478 | prepend it (C<unshift_read_chunk>). |
607 | between a number of predefined parsing formats, for chunks of data, lines |
|
|
608 | etc. |
479 | |
609 | |
480 | The callback will be called only once C<$len> bytes have been read, and |
610 | Predefined types are (if you have ideas for additional types, feel free to |
481 | these C<$len> bytes will be passed to the callback. |
611 | drop by and tell us): |
482 | |
612 | |
483 | =cut |
613 | =over 4 |
484 | |
614 | |
485 | sub _read_chunk($$) { |
615 | =item chunk => $octets, $cb->($self, $data) |
|
|
616 | |
|
|
617 | Invoke the callback only once C<$octets> bytes have been read. Pass the |
|
|
618 | data read to the callback. The callback will never be called with less |
|
|
619 | data. |
|
|
620 | |
|
|
621 | Example: read 2 bytes. |
|
|
622 | |
|
|
623 | $handle->push_read (chunk => 2, sub { |
|
|
624 | warn "yay ", unpack "H*", $_[1]; |
|
|
625 | }); |
|
|
626 | |
|
|
627 | =cut |
|
|
628 | |
|
|
629 | register_read_type chunk => sub { |
486 | my ($self, $len, $cb) = @_; |
630 | my ($self, $cb, $len) = @_; |
487 | |
631 | |
488 | sub { |
632 | sub { |
489 | $len <= length $_[0]{rbuf} or return; |
633 | $len <= length $_[0]{rbuf} or return; |
490 | $cb->($self, $_[0], substr $_[0]{rbuf}, 0, $len, ""); |
634 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
491 | 1 |
635 | 1 |
492 | } |
636 | } |
493 | } |
637 | }; |
494 | |
638 | |
|
|
639 | # compatibility with older API |
495 | sub push_read_chunk { |
640 | sub push_read_chunk { |
496 | $_[0]->push_read (&_read_chunk); |
641 | $_[0]->push_read (chunk => $_[1], $_[2]); |
497 | } |
642 | } |
498 | |
|
|
499 | |
643 | |
500 | sub unshift_read_chunk { |
644 | sub unshift_read_chunk { |
501 | $_[0]->unshift_read (&_read_chunk); |
645 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
502 | } |
646 | } |
503 | |
647 | |
504 | =item $handle->push_read_line ([$eol, ]$cb->($self, $line, $eol)) |
648 | =item line => [$eol, ]$cb->($self, $line, $eol) |
505 | |
|
|
506 | =item $handle->unshift_read_line ([$eol, ]$cb->($self, $line, $eol)) |
|
|
507 | |
|
|
508 | Append the given callback to the end of the queue (C<push_read_line>) or |
|
|
509 | prepend it (C<unshift_read_line>). |
|
|
510 | |
649 | |
511 | The callback will be called only once a full line (including the end of |
650 | The callback will be called only once a full line (including the end of |
512 | line marker, C<$eol>) has been read. This line (excluding the end of line |
651 | line marker, C<$eol>) has been read. This line (excluding the end of line |
513 | marker) will be passed to the callback as second argument (C<$line>), and |
652 | marker) will be passed to the callback as second argument (C<$line>), and |
514 | the end of line marker as the third argument (C<$eol>). |
653 | the end of line marker as the third argument (C<$eol>). |
… | |
… | |
525 | Partial lines at the end of the stream will never be returned, as they are |
664 | Partial lines at the end of the stream will never be returned, as they are |
526 | not marked by the end of line marker. |
665 | not marked by the end of line marker. |
527 | |
666 | |
528 | =cut |
667 | =cut |
529 | |
668 | |
530 | sub _read_line($$) { |
669 | register_read_type line => sub { |
531 | my $self = shift; |
670 | my ($self, $cb, $eol) = @_; |
532 | my $cb = pop; |
|
|
533 | my $eol = @_ ? shift : qr|(\015?\012)|; |
|
|
534 | my $pos; |
|
|
535 | |
671 | |
|
|
672 | $eol = qr|(\015?\012)| if @_ < 3; |
536 | $eol = qr|(\Q$eol\E)| unless ref $eol; |
673 | $eol = quotemeta $eol unless ref $eol; |
537 | $eol = qr|^(.*?)($eol)|; |
674 | $eol = qr|^(.*?)($eol)|s; |
538 | |
675 | |
539 | sub { |
676 | sub { |
540 | $_[0]{rbuf} =~ s/$eol// or return; |
677 | $_[0]{rbuf} =~ s/$eol// or return; |
541 | |
678 | |
542 | $cb->($self, $1, $2); |
679 | $cb->($_[0], $1, $2); |
543 | 1 |
680 | 1 |
544 | } |
681 | } |
545 | } |
682 | }; |
546 | |
683 | |
|
|
684 | # compatibility with older API |
547 | sub push_read_line { |
685 | sub push_read_line { |
548 | $_[0]->push_read (&_read_line); |
686 | my $self = shift; |
|
|
687 | $self->push_read (line => @_); |
549 | } |
688 | } |
550 | |
689 | |
551 | sub unshift_read_line { |
690 | sub unshift_read_line { |
552 | $_[0]->unshift_read (&_read_line); |
691 | my $self = shift; |
|
|
692 | $self->unshift_read (line => @_); |
553 | } |
693 | } |
|
|
694 | |
|
|
695 | =item netstring => $cb->($string) |
|
|
696 | |
|
|
697 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
|
|
698 | |
|
|
699 | Throws an error with C<$!> set to EBADMSG on format violations. |
|
|
700 | |
|
|
701 | =cut |
|
|
702 | |
|
|
703 | register_read_type netstring => sub { |
|
|
704 | my ($self, $cb) = @_; |
|
|
705 | |
|
|
706 | sub { |
|
|
707 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
|
|
708 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
|
|
709 | $! = &Errno::EBADMSG; |
|
|
710 | $self->error; |
|
|
711 | } |
|
|
712 | return; |
|
|
713 | } |
|
|
714 | |
|
|
715 | my $len = $1; |
|
|
716 | |
|
|
717 | $self->unshift_read (chunk => $len, sub { |
|
|
718 | my $string = $_[1]; |
|
|
719 | $_[0]->unshift_read (chunk => 1, sub { |
|
|
720 | if ($_[1] eq ",") { |
|
|
721 | $cb->($_[0], $string); |
|
|
722 | } else { |
|
|
723 | $! = &Errno::EBADMSG; |
|
|
724 | $self->error; |
|
|
725 | } |
|
|
726 | }); |
|
|
727 | }); |
|
|
728 | |
|
|
729 | 1 |
|
|
730 | } |
|
|
731 | }; |
|
|
732 | |
|
|
733 | =back |
|
|
734 | |
|
|
735 | =item AnyEvent::Handle::register_read_type type => $coderef->($self, $cb, @args) |
|
|
736 | |
|
|
737 | This function (not method) lets you add your own types to C<push_read>. |
|
|
738 | |
|
|
739 | Whenever the given C<type> is used, C<push_read> will invoke the code |
|
|
740 | reference with the handle object, the callback and the remaining |
|
|
741 | arguments. |
|
|
742 | |
|
|
743 | The code reference is supposed to return a callback (usually a closure) |
|
|
744 | that works as a plain read callback (see C<< ->push_read ($cb) >>). |
|
|
745 | |
|
|
746 | It should invoke the passed callback when it is done reading (remember to |
|
|
747 | pass C<$self> as first argument as all other callbacks do that). |
|
|
748 | |
|
|
749 | Note that this is a function, and all types registered this way will be |
|
|
750 | global, so try to use unique names. |
|
|
751 | |
|
|
752 | For examples, see the source of this module (F<perldoc -m AnyEvent::Handle>, |
|
|
753 | search for C<register_read_type>)). |
554 | |
754 | |
555 | =item $handle->stop_read |
755 | =item $handle->stop_read |
556 | |
756 | |
557 | =item $handle->start_read |
757 | =item $handle->start_read |
558 | |
758 | |
559 | In rare cases you actually do not want to read anything form the |
759 | In rare cases you actually do not want to read anything from the |
560 | socket. In this case you can call C<stop_read>. Neither C<on_read> no |
760 | socket. In this case you can call C<stop_read>. Neither C<on_read> no |
561 | any queued callbacks will be executed then. To start readign again, call |
761 | any queued callbacks will be executed then. To start reading again, call |
562 | C<start_read>. |
762 | C<start_read>. |
563 | |
763 | |
564 | =cut |
764 | =cut |
565 | |
765 | |
566 | sub stop_read { |
766 | sub stop_read { |
… | |
… | |
574 | |
774 | |
575 | unless ($self->{rw} || $self->{eof}) { |
775 | unless ($self->{rw} || $self->{eof}) { |
576 | Scalar::Util::weaken $self; |
776 | Scalar::Util::weaken $self; |
577 | |
777 | |
578 | $self->{rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
778 | $self->{rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
|
|
779 | my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; |
579 | my $len = sysread $self->{fh}, $self->{rbuf}, $self->{read_size} || 8192, length $self->{rbuf}; |
780 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
580 | |
781 | |
581 | if ($len > 0) { |
782 | if ($len > 0) { |
582 | if (defined $self->{rbuf_max}) { |
783 | $self->{filter_r} |
583 | if ($self->{rbuf_max} < length $self->{rbuf}) { |
784 | ? $self->{filter_r}->($self, $rbuf) |
584 | $! = &Errno::ENOSPC; return $self->error; |
785 | : $self->_drain_rbuf; |
585 | } |
|
|
586 | } |
|
|
587 | |
786 | |
588 | } elsif (defined $len) { |
787 | } elsif (defined $len) { |
|
|
788 | delete $self->{rw}; |
589 | $self->{eof} = 1; |
789 | $self->{eof} = 1; |
590 | delete $self->{rw}; |
790 | $self->_drain_rbuf; |
591 | |
791 | |
592 | } elsif ($! != EAGAIN && $! != EINTR) { |
792 | } elsif ($! != EAGAIN && $! != EINTR && $! != &AnyEvent::Util::WSAWOULDBLOCK) { |
593 | return $self->error; |
793 | return $self->error; |
594 | } |
794 | } |
595 | |
|
|
596 | $self->_drain_rbuf; |
|
|
597 | }); |
795 | }); |
598 | } |
796 | } |
599 | } |
797 | } |
600 | |
798 | |
|
|
799 | sub _dotls { |
|
|
800 | my ($self) = @_; |
|
|
801 | |
|
|
802 | if (length $self->{tls_wbuf}) { |
|
|
803 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{tls_wbuf})) > 0) { |
|
|
804 | substr $self->{tls_wbuf}, 0, $len, ""; |
|
|
805 | } |
|
|
806 | } |
|
|
807 | |
|
|
808 | if (defined (my $buf = Net::SSLeay::BIO_read ($self->{tls_wbio}))) { |
|
|
809 | $self->{wbuf} .= $buf; |
|
|
810 | $self->_drain_wbuf; |
|
|
811 | } |
|
|
812 | |
|
|
813 | while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) { |
|
|
814 | $self->{rbuf} .= $buf; |
|
|
815 | $self->_drain_rbuf; |
|
|
816 | } |
|
|
817 | |
|
|
818 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
|
|
819 | |
|
|
820 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
|
|
821 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
|
|
822 | $self->error; |
|
|
823 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
|
|
824 | $! = &Errno::EIO; |
|
|
825 | $self->error; |
|
|
826 | } |
|
|
827 | |
|
|
828 | # all others are fine for our purposes |
|
|
829 | } |
|
|
830 | } |
|
|
831 | |
|
|
832 | =item $handle->starttls ($tls[, $tls_ctx]) |
|
|
833 | |
|
|
834 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
|
|
835 | object is created, you can also do that at a later time by calling |
|
|
836 | C<starttls>. |
|
|
837 | |
|
|
838 | The first argument is the same as the C<tls> constructor argument (either |
|
|
839 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
|
|
840 | |
|
|
841 | The second argument is the optional C<Net::SSLeay::CTX> object that is |
|
|
842 | used when AnyEvent::Handle has to create its own TLS connection object. |
|
|
843 | |
|
|
844 | =cut |
|
|
845 | |
|
|
846 | # TODO: maybe document... |
|
|
847 | sub starttls { |
|
|
848 | my ($self, $ssl, $ctx) = @_; |
|
|
849 | |
|
|
850 | $self->stoptls; |
|
|
851 | |
|
|
852 | if ($ssl eq "accept") { |
|
|
853 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
|
|
854 | Net::SSLeay::set_accept_state ($ssl); |
|
|
855 | } elsif ($ssl eq "connect") { |
|
|
856 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
|
|
857 | Net::SSLeay::set_connect_state ($ssl); |
|
|
858 | } |
|
|
859 | |
|
|
860 | $self->{tls} = $ssl; |
|
|
861 | |
|
|
862 | # basically, this is deep magic (because SSL_read should have the same issues) |
|
|
863 | # but the openssl maintainers basically said: "trust us, it just works". |
|
|
864 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
|
|
865 | # and mismaintained ssleay-module doesn't even offer them). |
|
|
866 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
|
|
867 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
|
|
868 | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
|
|
869 | | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
|
|
870 | |
|
|
871 | $self->{tls_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
|
|
872 | $self->{tls_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
|
|
873 | |
|
|
874 | Net::SSLeay::set_bio ($ssl, $self->{tls_rbio}, $self->{tls_wbio}); |
|
|
875 | |
|
|
876 | $self->{filter_w} = sub { |
|
|
877 | $_[0]{tls_wbuf} .= ${$_[1]}; |
|
|
878 | &_dotls; |
|
|
879 | }; |
|
|
880 | $self->{filter_r} = sub { |
|
|
881 | Net::SSLeay::BIO_write ($_[0]{tls_rbio}, ${$_[1]}); |
|
|
882 | &_dotls; |
|
|
883 | }; |
|
|
884 | } |
|
|
885 | |
|
|
886 | =item $handle->stoptls |
|
|
887 | |
|
|
888 | Destroys the SSL connection, if any. Partial read or write data will be |
|
|
889 | lost. |
|
|
890 | |
|
|
891 | =cut |
|
|
892 | |
|
|
893 | sub stoptls { |
|
|
894 | my ($self) = @_; |
|
|
895 | |
|
|
896 | Net::SSLeay::free (delete $self->{tls}) if $self->{tls}; |
|
|
897 | delete $self->{tls_rbio}; |
|
|
898 | delete $self->{tls_wbio}; |
|
|
899 | delete $self->{tls_wbuf}; |
|
|
900 | delete $self->{filter_r}; |
|
|
901 | delete $self->{filter_w}; |
|
|
902 | } |
|
|
903 | |
|
|
904 | sub DESTROY { |
|
|
905 | my $self = shift; |
|
|
906 | |
|
|
907 | $self->stoptls; |
|
|
908 | } |
|
|
909 | |
|
|
910 | =item AnyEvent::Handle::TLS_CTX |
|
|
911 | |
|
|
912 | This function creates and returns the Net::SSLeay::CTX object used by |
|
|
913 | default for TLS mode. |
|
|
914 | |
|
|
915 | The context is created like this: |
|
|
916 | |
|
|
917 | Net::SSLeay::load_error_strings; |
|
|
918 | Net::SSLeay::SSLeay_add_ssl_algorithms; |
|
|
919 | Net::SSLeay::randomize; |
|
|
920 | |
|
|
921 | my $CTX = Net::SSLeay::CTX_new; |
|
|
922 | |
|
|
923 | Net::SSLeay::CTX_set_options $CTX, Net::SSLeay::OP_ALL |
|
|
924 | |
|
|
925 | =cut |
|
|
926 | |
|
|
927 | our $TLS_CTX; |
|
|
928 | |
|
|
929 | sub TLS_CTX() { |
|
|
930 | $TLS_CTX || do { |
|
|
931 | require Net::SSLeay; |
|
|
932 | |
|
|
933 | Net::SSLeay::load_error_strings (); |
|
|
934 | Net::SSLeay::SSLeay_add_ssl_algorithms (); |
|
|
935 | Net::SSLeay::randomize (); |
|
|
936 | |
|
|
937 | $TLS_CTX = Net::SSLeay::CTX_new (); |
|
|
938 | |
|
|
939 | Net::SSLeay::CTX_set_options ($TLS_CTX, Net::SSLeay::OP_ALL ()); |
|
|
940 | |
|
|
941 | $TLS_CTX |
|
|
942 | } |
|
|
943 | } |
|
|
944 | |
601 | =back |
945 | =back |
602 | |
946 | |
603 | =head1 AUTHOR |
947 | =head1 AUTHOR |
604 | |
948 | |
605 | Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. |
949 | Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. |