… | |
… | |
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 file handles via AnyEvent |
15 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
16 | |
16 | |
17 | This module is experimental. |
|
|
18 | |
|
|
19 | =cut |
17 | =cut |
20 | |
18 | |
21 | our $VERSION = '0.04'; |
19 | our $VERSION = '0.04'; |
22 | |
20 | |
23 | =head1 SYNOPSIS |
21 | =head1 SYNOPSIS |
… | |
… | |
25 | use AnyEvent; |
23 | use AnyEvent; |
26 | use AnyEvent::Handle; |
24 | use AnyEvent::Handle; |
27 | |
25 | |
28 | my $cv = AnyEvent->condvar; |
26 | my $cv = AnyEvent->condvar; |
29 | |
27 | |
30 | my $ae_fh = AnyEvent::Handle->new (fh => \*STDIN); |
28 | my $handle = |
31 | |
|
|
32 | #TODO |
|
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33 | |
|
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34 | # or use the constructor to pass the callback: |
|
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35 | |
|
|
36 | my $ae_fh2 = |
|
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37 | AnyEvent::Handle->new ( |
29 | AnyEvent::Handle->new ( |
38 | fh => \*STDIN, |
30 | fh => \*STDIN, |
39 | on_eof => sub { |
31 | on_eof => sub { |
40 | $cv->broadcast; |
32 | $cv->broadcast; |
41 | }, |
33 | }, |
42 | #TODO |
|
|
43 | ); |
34 | ); |
44 | |
35 | |
45 | $cv->wait; |
36 | # send some request line |
|
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37 | $handle->push_write ("getinfo\015\012"); |
|
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38 | |
|
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39 | # read the response line |
|
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40 | $handle->push_read (line => sub { |
|
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41 | my ($handle, $line) = @_; |
|
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42 | warn "read line <$line>\n"; |
|
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43 | $cv->send; |
|
|
44 | }); |
|
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45 | |
|
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46 | $cv->recv; |
46 | |
47 | |
47 | =head1 DESCRIPTION |
48 | =head1 DESCRIPTION |
48 | |
49 | |
49 | This module is a helper module to make it easier to do event-based I/O on |
50 | This module is a helper module to make it easier to do event-based I/O on |
50 | filehandles. For utility functions for doing non-blocking connects and accepts |
51 | filehandles. For utility functions for doing non-blocking connects and accepts |
… | |
… | |
90 | |
91 | |
91 | The object will not be in a usable state when this callback has been |
92 | The object will not be in a usable state when this callback has been |
92 | called. |
93 | called. |
93 | |
94 | |
94 | On callback entrance, the value of C<$!> contains the operating system |
95 | On callback entrance, the value of C<$!> contains the operating system |
95 | error (or C<ENOSPC> or C<EPIPE>). |
96 | error (or C<ENOSPC>, C<EPIPE> or C<EBADMSG>). |
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97 | |
|
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98 | The callback should throw an exception. If it returns, then |
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99 | AnyEvent::Handle will C<croak> for you. |
96 | |
100 | |
97 | While not mandatory, it is I<highly> recommended to set this callback, as |
101 | While not mandatory, it is I<highly> recommended to set this callback, as |
98 | you will not be notified of errors otherwise. The default simply calls |
102 | you will not be notified of errors otherwise. The default simply calls |
99 | die. |
103 | die. |
100 | |
104 | |
… | |
… | |
145 | |
149 | |
146 | When this parameter is given, it enables TLS (SSL) mode, that means it |
150 | When this parameter is given, it enables TLS (SSL) mode, that means it |
147 | will start making tls handshake and will transparently encrypt/decrypt |
151 | will start making tls handshake and will transparently encrypt/decrypt |
148 | data. |
152 | data. |
149 | |
153 | |
|
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154 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
|
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155 | automatically when you try to create a TLS handle). |
|
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156 | |
150 | For the TLS server side, use C<accept>, and for the TLS client side of a |
157 | For the TLS server side, use C<accept>, and for the TLS client side of a |
151 | connection, use C<connect> mode. |
158 | connection, use C<connect> mode. |
152 | |
159 | |
153 | You can also provide your own TLS connection object, but you have |
160 | You can also provide your own TLS connection object, but you have |
154 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
161 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
155 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
162 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
156 | AnyEvent::Handle. |
163 | AnyEvent::Handle. |
157 | |
164 | |
|
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165 | See the C<starttls> method if you need to start TLs negotiation later. |
|
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166 | |
158 | =item tls_ctx => $ssl_ctx |
167 | =item tls_ctx => $ssl_ctx |
159 | |
168 | |
160 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
169 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
161 | (unless a connection object was specified directly). If this parameter is |
170 | (unless a connection object was specified directly). If this parameter is |
162 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
171 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
|
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172 | |
|
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173 | =item filter_r => $cb |
|
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174 | |
|
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175 | =item filter_w => $cb |
|
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176 | |
|
|
177 | These exist, but are undocumented at this time. |
163 | |
178 | |
164 | =back |
179 | =back |
165 | |
180 | |
166 | =cut |
181 | =cut |
167 | |
182 | |
… | |
… | |
190 | } |
205 | } |
191 | |
206 | |
192 | sub _shutdown { |
207 | sub _shutdown { |
193 | my ($self) = @_; |
208 | my ($self) = @_; |
194 | |
209 | |
195 | delete $self->{rw}; |
210 | delete $self->{_rw}; |
196 | delete $self->{ww}; |
211 | delete $self->{_ww}; |
197 | delete $self->{fh}; |
212 | delete $self->{fh}; |
198 | } |
213 | } |
199 | |
214 | |
200 | sub error { |
215 | sub error { |
201 | my ($self) = @_; |
216 | my ($self) = @_; |
… | |
… | |
203 | { |
218 | { |
204 | local $!; |
219 | local $!; |
205 | $self->_shutdown; |
220 | $self->_shutdown; |
206 | } |
221 | } |
207 | |
222 | |
208 | if ($self->{on_error}) { |
|
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209 | $self->{on_error}($self); |
223 | $self->{on_error}($self) |
210 | } else { |
224 | if $self->{on_error}; |
|
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225 | |
211 | die "AnyEvent::Handle uncaught fatal error: $!"; |
226 | Carp::croak "AnyEvent::Handle uncaught fatal error: $!"; |
212 | } |
|
|
213 | } |
227 | } |
214 | |
228 | |
215 | =item $fh = $handle->fh |
229 | =item $fh = $handle->fh |
216 | |
230 | |
217 | This method returns the file handle of the L<AnyEvent::Handle> object. |
231 | This method returns the file handle of the L<AnyEvent::Handle> object. |
218 | |
232 | |
219 | =cut |
233 | =cut |
220 | |
234 | |
221 | sub fh { $_[0]->{fh} } |
235 | sub fh { $_[0]{fh} } |
222 | |
236 | |
223 | =item $handle->on_error ($cb) |
237 | =item $handle->on_error ($cb) |
224 | |
238 | |
225 | Replace the current C<on_error> callback (see the C<on_error> constructor argument). |
239 | Replace the current C<on_error> callback (see the C<on_error> constructor argument). |
226 | |
240 | |
… | |
… | |
282 | =cut |
296 | =cut |
283 | |
297 | |
284 | sub _drain_wbuf { |
298 | sub _drain_wbuf { |
285 | my ($self) = @_; |
299 | my ($self) = @_; |
286 | |
300 | |
287 | unless ($self->{ww}) { |
301 | if (!$self->{_ww} && length $self->{wbuf}) { |
|
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302 | |
288 | Scalar::Util::weaken $self; |
303 | Scalar::Util::weaken $self; |
|
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304 | |
289 | my $cb = sub { |
305 | my $cb = sub { |
290 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
306 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
291 | |
307 | |
292 | if ($len > 0) { |
308 | if ($len >= 0) { |
293 | substr $self->{wbuf}, 0, $len, ""; |
309 | substr $self->{wbuf}, 0, $len, ""; |
294 | |
310 | |
295 | $self->{on_drain}($self) |
311 | $self->{on_drain}($self) |
296 | if $self->{low_water_mark} >= length $self->{wbuf} |
312 | if $self->{low_water_mark} >= length $self->{wbuf} |
297 | && $self->{on_drain}; |
313 | && $self->{on_drain}; |
298 | |
314 | |
299 | delete $self->{ww} unless length $self->{wbuf}; |
315 | delete $self->{_ww} unless length $self->{wbuf}; |
300 | } elsif ($! != EAGAIN && $! != EINTR) { |
316 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAWOULDBLOCK) { |
301 | $self->error; |
317 | $self->error; |
302 | } |
318 | } |
303 | }; |
319 | }; |
304 | |
320 | |
|
|
321 | # try to write data immediately |
|
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322 | $cb->(); |
|
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323 | |
|
|
324 | # if still data left in wbuf, we need to poll |
305 | $self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb); |
325 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
306 | |
326 | if length $self->{wbuf}; |
307 | $cb->($self); |
|
|
308 | }; |
327 | }; |
|
|
328 | } |
|
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329 | |
|
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330 | our %WH; |
|
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331 | |
|
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332 | sub register_write_type($$) { |
|
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333 | $WH{$_[0]} = $_[1]; |
309 | } |
334 | } |
310 | |
335 | |
311 | sub push_write { |
336 | sub push_write { |
312 | my $self = shift; |
337 | my $self = shift; |
|
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338 | |
|
|
339 | if (@_ > 1) { |
|
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340 | my $type = shift; |
|
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341 | |
|
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342 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
|
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343 | ->($self, @_); |
|
|
344 | } |
313 | |
345 | |
314 | if ($self->{filter_w}) { |
346 | if ($self->{filter_w}) { |
315 | $self->{filter_w}->($self, \$_[0]); |
347 | $self->{filter_w}->($self, \$_[0]); |
316 | } else { |
348 | } else { |
317 | $self->{wbuf} .= $_[0]; |
349 | $self->{wbuf} .= $_[0]; |
318 | $self->_drain_wbuf; |
350 | $self->_drain_wbuf; |
319 | } |
351 | } |
320 | } |
352 | } |
|
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353 | |
|
|
354 | =item $handle->push_write (type => @args) |
|
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355 | |
|
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356 | =item $handle->unshift_write (type => @args) |
|
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357 | |
|
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358 | Instead of formatting your data yourself, you can also let this module do |
|
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359 | the job by specifying a type and type-specific arguments. |
|
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360 | |
|
|
361 | Predefined types are (if you have ideas for additional types, feel free to |
|
|
362 | drop by and tell us): |
|
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363 | |
|
|
364 | =over 4 |
|
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365 | |
|
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366 | =item netstring => $string |
|
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367 | |
|
|
368 | Formats the given value as netstring |
|
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369 | (http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them). |
|
|
370 | |
|
|
371 | =back |
|
|
372 | |
|
|
373 | =cut |
|
|
374 | |
|
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375 | register_write_type netstring => sub { |
|
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376 | my ($self, $string) = @_; |
|
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377 | |
|
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378 | sprintf "%d:%s,", (length $string), $string |
|
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379 | }; |
|
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380 | |
|
|
381 | =item AnyEvent::Handle::register_write_type type => $coderef->($self, @args) |
|
|
382 | |
|
|
383 | This function (not method) lets you add your own types to C<push_write>. |
|
|
384 | Whenever the given C<type> is used, C<push_write> will invoke the code |
|
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385 | reference with the handle object and the remaining arguments. |
|
|
386 | |
|
|
387 | The code reference is supposed to return a single octet string that will |
|
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388 | be appended to the write buffer. |
|
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389 | |
|
|
390 | Note that this is a function, and all types registered this way will be |
|
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391 | global, so try to use unique names. |
|
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392 | |
|
|
393 | =cut |
321 | |
394 | |
322 | ############################################################################# |
395 | ############################################################################# |
323 | |
396 | |
324 | =back |
397 | =back |
325 | |
398 | |
… | |
… | |
404 | |
477 | |
405 | if ( |
478 | if ( |
406 | defined $self->{rbuf_max} |
479 | defined $self->{rbuf_max} |
407 | && $self->{rbuf_max} < length $self->{rbuf} |
480 | && $self->{rbuf_max} < length $self->{rbuf} |
408 | ) { |
481 | ) { |
409 | $! = &Errno::ENOSPC; return $self->error; |
482 | $! = &Errno::ENOSPC; |
|
|
483 | $self->error; |
410 | } |
484 | } |
411 | |
485 | |
412 | return if $self->{in_drain}; |
486 | return if $self->{in_drain}; |
413 | local $self->{in_drain} = 1; |
487 | local $self->{in_drain} = 1; |
414 | |
488 | |
415 | while (my $len = length $self->{rbuf}) { |
489 | while (my $len = length $self->{rbuf}) { |
416 | no strict 'refs'; |
490 | no strict 'refs'; |
417 | if (my $cb = shift @{ $self->{queue} }) { |
491 | if (my $cb = shift @{ $self->{_queue} }) { |
418 | if (!$cb->($self)) { |
492 | unless ($cb->($self)) { |
419 | if ($self->{eof}) { |
493 | if ($self->{_eof}) { |
420 | # no progress can be made (not enough data and no data forthcoming) |
494 | # no progress can be made (not enough data and no data forthcoming) |
421 | $! = &Errno::EPIPE; return $self->error; |
495 | $! = &Errno::EPIPE; |
|
|
496 | $self->error; |
422 | } |
497 | } |
423 | |
498 | |
424 | unshift @{ $self->{queue} }, $cb; |
499 | unshift @{ $self->{_queue} }, $cb; |
425 | return; |
500 | return; |
426 | } |
501 | } |
427 | } elsif ($self->{on_read}) { |
502 | } elsif ($self->{on_read}) { |
428 | $self->{on_read}($self); |
503 | $self->{on_read}($self); |
429 | |
504 | |
430 | if ( |
505 | if ( |
431 | $self->{eof} # if no further data will arrive |
506 | $self->{_eof} # if no further data will arrive |
432 | && $len == length $self->{rbuf} # and no data has been consumed |
507 | && $len == length $self->{rbuf} # and no data has been consumed |
433 | && !@{ $self->{queue} } # and the queue is still empty |
508 | && !@{ $self->{_queue} } # and the queue is still empty |
434 | && $self->{on_read} # and we still want to read data |
509 | && $self->{on_read} # and we still want to read data |
435 | ) { |
510 | ) { |
436 | # then no progress can be made |
511 | # then no progress can be made |
437 | $! = &Errno::EPIPE; return $self->error; |
512 | $! = &Errno::EPIPE; |
|
|
513 | $self->error; |
438 | } |
514 | } |
439 | } else { |
515 | } else { |
440 | # read side becomes idle |
516 | # read side becomes idle |
441 | delete $self->{rw}; |
517 | delete $self->{_rw}; |
442 | return; |
518 | return; |
443 | } |
519 | } |
444 | } |
520 | } |
445 | |
521 | |
446 | if ($self->{eof}) { |
522 | if ($self->{_eof}) { |
447 | $self->_shutdown; |
523 | $self->_shutdown; |
448 | $self->{on_eof}($self) |
524 | $self->{on_eof}($self) |
449 | if $self->{on_eof}; |
525 | if $self->{on_eof}; |
450 | } |
526 | } |
451 | } |
527 | } |
… | |
… | |
500 | interested in (which can be none at all) and return a true value. After returning |
576 | interested in (which can be none at all) and return a true value. After returning |
501 | true, it will be removed from the queue. |
577 | true, it will be removed from the queue. |
502 | |
578 | |
503 | =cut |
579 | =cut |
504 | |
580 | |
|
|
581 | our %RH; |
|
|
582 | |
|
|
583 | sub register_read_type($$) { |
|
|
584 | $RH{$_[0]} = $_[1]; |
|
|
585 | } |
|
|
586 | |
505 | sub push_read { |
587 | sub push_read { |
506 | my ($self, $cb) = @_; |
588 | my $self = shift; |
|
|
589 | my $cb = pop; |
507 | |
590 | |
|
|
591 | if (@_) { |
|
|
592 | my $type = shift; |
|
|
593 | |
|
|
594 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
|
|
595 | ->($self, $cb, @_); |
|
|
596 | } |
|
|
597 | |
508 | push @{ $self->{queue} }, $cb; |
598 | push @{ $self->{_queue} }, $cb; |
509 | $self->_drain_rbuf; |
599 | $self->_drain_rbuf; |
510 | } |
600 | } |
511 | |
601 | |
512 | sub unshift_read { |
602 | sub unshift_read { |
513 | my ($self, $cb) = @_; |
603 | my $self = shift; |
|
|
604 | my $cb = pop; |
514 | |
605 | |
|
|
606 | if (@_) { |
|
|
607 | my $type = shift; |
|
|
608 | |
|
|
609 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read") |
|
|
610 | ->($self, $cb, @_); |
|
|
611 | } |
|
|
612 | |
|
|
613 | |
515 | push @{ $self->{queue} }, $cb; |
614 | unshift @{ $self->{_queue} }, $cb; |
516 | $self->_drain_rbuf; |
615 | $self->_drain_rbuf; |
517 | } |
616 | } |
518 | |
617 | |
519 | =item $handle->push_read_chunk ($len, $cb->($self, $data)) |
618 | =item $handle->push_read (type => @args, $cb) |
520 | |
619 | |
521 | =item $handle->unshift_read_chunk ($len, $cb->($self, $data)) |
620 | =item $handle->unshift_read (type => @args, $cb) |
522 | |
621 | |
523 | Append the given callback to the end of the queue (C<push_read_chunk>) or |
622 | Instead of providing a callback that parses the data itself you can chose |
524 | prepend it (C<unshift_read_chunk>). |
623 | between a number of predefined parsing formats, for chunks of data, lines |
|
|
624 | etc. |
525 | |
625 | |
526 | The callback will be called only once C<$len> bytes have been read, and |
626 | Predefined types are (if you have ideas for additional types, feel free to |
527 | these C<$len> bytes will be passed to the callback. |
627 | drop by and tell us): |
528 | |
628 | |
529 | =cut |
629 | =over 4 |
530 | |
630 | |
531 | sub _read_chunk($$) { |
631 | =item chunk => $octets, $cb->($self, $data) |
|
|
632 | |
|
|
633 | Invoke the callback only once C<$octets> bytes have been read. Pass the |
|
|
634 | data read to the callback. The callback will never be called with less |
|
|
635 | data. |
|
|
636 | |
|
|
637 | Example: read 2 bytes. |
|
|
638 | |
|
|
639 | $handle->push_read (chunk => 2, sub { |
|
|
640 | warn "yay ", unpack "H*", $_[1]; |
|
|
641 | }); |
|
|
642 | |
|
|
643 | =cut |
|
|
644 | |
|
|
645 | register_read_type chunk => sub { |
532 | my ($self, $len, $cb) = @_; |
646 | my ($self, $cb, $len) = @_; |
533 | |
647 | |
534 | sub { |
648 | sub { |
535 | $len <= length $_[0]{rbuf} or return; |
649 | $len <= length $_[0]{rbuf} or return; |
536 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
650 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
537 | 1 |
651 | 1 |
538 | } |
652 | } |
539 | } |
653 | }; |
540 | |
654 | |
|
|
655 | # compatibility with older API |
541 | sub push_read_chunk { |
656 | sub push_read_chunk { |
542 | $_[0]->push_read (&_read_chunk); |
657 | $_[0]->push_read (chunk => $_[1], $_[2]); |
543 | } |
658 | } |
544 | |
|
|
545 | |
659 | |
546 | sub unshift_read_chunk { |
660 | sub unshift_read_chunk { |
547 | $_[0]->unshift_read (&_read_chunk); |
661 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
548 | } |
662 | } |
549 | |
663 | |
550 | =item $handle->push_read_line ([$eol, ]$cb->($self, $line, $eol)) |
664 | =item line => [$eol, ]$cb->($self, $line, $eol) |
551 | |
|
|
552 | =item $handle->unshift_read_line ([$eol, ]$cb->($self, $line, $eol)) |
|
|
553 | |
|
|
554 | Append the given callback to the end of the queue (C<push_read_line>) or |
|
|
555 | prepend it (C<unshift_read_line>). |
|
|
556 | |
665 | |
557 | The callback will be called only once a full line (including the end of |
666 | The callback will be called only once a full line (including the end of |
558 | line marker, C<$eol>) has been read. This line (excluding the end of line |
667 | line marker, C<$eol>) has been read. This line (excluding the end of line |
559 | marker) will be passed to the callback as second argument (C<$line>), and |
668 | marker) will be passed to the callback as second argument (C<$line>), and |
560 | the end of line marker as the third argument (C<$eol>). |
669 | the end of line marker as the third argument (C<$eol>). |
… | |
… | |
571 | Partial lines at the end of the stream will never be returned, as they are |
680 | Partial lines at the end of the stream will never be returned, as they are |
572 | not marked by the end of line marker. |
681 | not marked by the end of line marker. |
573 | |
682 | |
574 | =cut |
683 | =cut |
575 | |
684 | |
576 | sub _read_line($$) { |
685 | register_read_type line => sub { |
577 | my $self = shift; |
686 | my ($self, $cb, $eol) = @_; |
578 | my $cb = pop; |
|
|
579 | my $eol = @_ ? shift : qr|(\015?\012)|; |
|
|
580 | my $pos; |
|
|
581 | |
687 | |
|
|
688 | $eol = qr|(\015?\012)| if @_ < 3; |
582 | $eol = quotemeta $eol unless ref $eol; |
689 | $eol = quotemeta $eol unless ref $eol; |
583 | $eol = qr|^(.*?)($eol)|s; |
690 | $eol = qr|^(.*?)($eol)|s; |
584 | |
691 | |
585 | sub { |
692 | sub { |
586 | $_[0]{rbuf} =~ s/$eol// or return; |
693 | $_[0]{rbuf} =~ s/$eol// or return; |
587 | |
694 | |
588 | $cb->($_[0], $1, $2); |
695 | $cb->($_[0], $1, $2); |
589 | 1 |
696 | 1 |
590 | } |
697 | } |
591 | } |
698 | }; |
592 | |
699 | |
|
|
700 | # compatibility with older API |
593 | sub push_read_line { |
701 | sub push_read_line { |
594 | $_[0]->push_read (&_read_line); |
702 | my $self = shift; |
|
|
703 | $self->push_read (line => @_); |
595 | } |
704 | } |
596 | |
705 | |
597 | sub unshift_read_line { |
706 | sub unshift_read_line { |
598 | $_[0]->unshift_read (&_read_line); |
707 | my $self = shift; |
|
|
708 | $self->unshift_read (line => @_); |
599 | } |
709 | } |
|
|
710 | |
|
|
711 | =item netstring => $cb->($string) |
|
|
712 | |
|
|
713 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
|
|
714 | |
|
|
715 | Throws an error with C<$!> set to EBADMSG on format violations. |
|
|
716 | |
|
|
717 | =cut |
|
|
718 | |
|
|
719 | register_read_type netstring => sub { |
|
|
720 | my ($self, $cb) = @_; |
|
|
721 | |
|
|
722 | sub { |
|
|
723 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
|
|
724 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
|
|
725 | $! = &Errno::EBADMSG; |
|
|
726 | $self->error; |
|
|
727 | } |
|
|
728 | return; |
|
|
729 | } |
|
|
730 | |
|
|
731 | my $len = $1; |
|
|
732 | |
|
|
733 | $self->unshift_read (chunk => $len, sub { |
|
|
734 | my $string = $_[1]; |
|
|
735 | $_[0]->unshift_read (chunk => 1, sub { |
|
|
736 | if ($_[1] eq ",") { |
|
|
737 | $cb->($_[0], $string); |
|
|
738 | } else { |
|
|
739 | $! = &Errno::EBADMSG; |
|
|
740 | $self->error; |
|
|
741 | } |
|
|
742 | }); |
|
|
743 | }); |
|
|
744 | |
|
|
745 | 1 |
|
|
746 | } |
|
|
747 | }; |
|
|
748 | |
|
|
749 | =item regex => $accept[, $reject[, $skip], $cb->($data) |
|
|
750 | |
|
|
751 | Makes a regex match against the regex object C<$accept> and returns |
|
|
752 | everything up to and including the match. |
|
|
753 | |
|
|
754 | Example: read a single line terminated by '\n'. |
|
|
755 | |
|
|
756 | $handle->push_read (regex => qr<\n>, sub { ... }); |
|
|
757 | |
|
|
758 | If C<$reject> is given and not undef, then it determines when the data is |
|
|
759 | to be rejected: it is matched against the data when the C<$accept> regex |
|
|
760 | does not match and generates an C<EBADMSG> error when it matches. This is |
|
|
761 | useful to quickly reject wrong data (to avoid waiting for a timeout or a |
|
|
762 | receive buffer overflow). |
|
|
763 | |
|
|
764 | Example: expect a single decimal number followed by whitespace, reject |
|
|
765 | anything else (not the use of an anchor). |
|
|
766 | |
|
|
767 | $handle->push_read (regex => qr<^[0-9]+\s>, qr<[^0-9]>, sub { ... }); |
|
|
768 | |
|
|
769 | If C<$skip> is given and not C<undef>, then it will be matched against |
|
|
770 | the receive buffer when neither C<$accept> nor C<$reject> match, |
|
|
771 | and everything preceding and including the match will be accepted |
|
|
772 | unconditionally. This is useful to skip large amounts of data that you |
|
|
773 | know cannot be matched, so that the C<$accept> or C<$reject> regex do not |
|
|
774 | have to start matching from the beginning. This is purely an optimisation |
|
|
775 | and is usually worth only when you expect more than a few kilobytes. |
|
|
776 | |
|
|
777 | Example: expect a http header, which ends at C<\015\012\015\012>. Since we |
|
|
778 | expect the header to be very large (it isn't in practise, but...), we use |
|
|
779 | a skip regex to skip initial portions. The skip regex is tricky in that |
|
|
780 | it only accepts something not ending in either \015 or \012, as these are |
|
|
781 | required for the accept regex. |
|
|
782 | |
|
|
783 | $handle->push_read (regex => |
|
|
784 | qr<\015\012\015\012>, |
|
|
785 | undef, # no reject |
|
|
786 | qr<^.*[^\015\012]>, |
|
|
787 | sub { ... }); |
|
|
788 | |
|
|
789 | =cut |
|
|
790 | |
|
|
791 | register_read_type regex => sub { |
|
|
792 | my ($self, $cb, $accept, $reject, $skip) = @_; |
|
|
793 | |
|
|
794 | my $data; |
|
|
795 | my $rbuf = \$self->{rbuf}; |
|
|
796 | |
|
|
797 | sub { |
|
|
798 | # accept |
|
|
799 | if ($$rbuf =~ $accept) { |
|
|
800 | $data .= substr $$rbuf, 0, $+[0], ""; |
|
|
801 | $cb->($self, $data); |
|
|
802 | return 1; |
|
|
803 | } |
|
|
804 | |
|
|
805 | # reject |
|
|
806 | if ($reject && $$rbuf =~ $reject) { |
|
|
807 | $! = &Errno::EBADMSG; |
|
|
808 | $self->error; |
|
|
809 | } |
|
|
810 | |
|
|
811 | # skip |
|
|
812 | if ($skip && $$rbuf =~ $skip) { |
|
|
813 | $data .= substr $$rbuf, 0, $+[0], ""; |
|
|
814 | } |
|
|
815 | |
|
|
816 | () |
|
|
817 | } |
|
|
818 | }; |
|
|
819 | |
|
|
820 | =back |
|
|
821 | |
|
|
822 | =item AnyEvent::Handle::register_read_type type => $coderef->($self, $cb, @args) |
|
|
823 | |
|
|
824 | This function (not method) lets you add your own types to C<push_read>. |
|
|
825 | |
|
|
826 | Whenever the given C<type> is used, C<push_read> will invoke the code |
|
|
827 | reference with the handle object, the callback and the remaining |
|
|
828 | arguments. |
|
|
829 | |
|
|
830 | The code reference is supposed to return a callback (usually a closure) |
|
|
831 | that works as a plain read callback (see C<< ->push_read ($cb) >>). |
|
|
832 | |
|
|
833 | It should invoke the passed callback when it is done reading (remember to |
|
|
834 | pass C<$self> as first argument as all other callbacks do that). |
|
|
835 | |
|
|
836 | Note that this is a function, and all types registered this way will be |
|
|
837 | global, so try to use unique names. |
|
|
838 | |
|
|
839 | For examples, see the source of this module (F<perldoc -m AnyEvent::Handle>, |
|
|
840 | search for C<register_read_type>)). |
600 | |
841 | |
601 | =item $handle->stop_read |
842 | =item $handle->stop_read |
602 | |
843 | |
603 | =item $handle->start_read |
844 | =item $handle->start_read |
604 | |
845 | |
… | |
… | |
610 | =cut |
851 | =cut |
611 | |
852 | |
612 | sub stop_read { |
853 | sub stop_read { |
613 | my ($self) = @_; |
854 | my ($self) = @_; |
614 | |
855 | |
615 | delete $self->{rw}; |
856 | delete $self->{_rw}; |
616 | } |
857 | } |
617 | |
858 | |
618 | sub start_read { |
859 | sub start_read { |
619 | my ($self) = @_; |
860 | my ($self) = @_; |
620 | |
861 | |
621 | unless ($self->{rw} || $self->{eof}) { |
862 | unless ($self->{_rw} || $self->{_eof}) { |
622 | Scalar::Util::weaken $self; |
863 | Scalar::Util::weaken $self; |
623 | |
864 | |
624 | $self->{rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
865 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
625 | my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; |
866 | my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; |
626 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
867 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
627 | |
868 | |
628 | if ($len > 0) { |
869 | if ($len > 0) { |
629 | $self->{filter_r} |
870 | $self->{filter_r} |
630 | ? $self->{filter_r}->($self, $rbuf) |
871 | ? $self->{filter_r}->($self, $rbuf) |
631 | : $self->_drain_rbuf; |
872 | : $self->_drain_rbuf; |
632 | |
873 | |
633 | } elsif (defined $len) { |
874 | } elsif (defined $len) { |
634 | delete $self->{rw}; |
875 | delete $self->{_rw}; |
635 | $self->{eof} = 1; |
876 | $self->{_eof} = 1; |
636 | $self->_drain_rbuf; |
877 | $self->_drain_rbuf; |
637 | |
878 | |
638 | } elsif ($! != EAGAIN && $! != EINTR) { |
879 | } elsif ($! != EAGAIN && $! != EINTR && $! != &AnyEvent::Util::WSAWOULDBLOCK) { |
639 | return $self->error; |
880 | return $self->error; |
640 | } |
881 | } |
641 | }); |
882 | }); |
642 | } |
883 | } |
643 | } |
884 | } |
644 | |
885 | |
645 | sub _dotls { |
886 | sub _dotls { |
646 | my ($self) = @_; |
887 | my ($self) = @_; |
647 | |
888 | |
648 | if (length $self->{tls_wbuf}) { |
889 | if (length $self->{_tls_wbuf}) { |
649 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{tls_wbuf})) > 0) { |
890 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
650 | substr $self->{tls_wbuf}, 0, $len, ""; |
891 | substr $self->{_tls_wbuf}, 0, $len, ""; |
651 | } |
892 | } |
652 | } |
893 | } |
653 | |
894 | |
654 | if (defined (my $buf = Net::SSLeay::BIO_read ($self->{tls_wbio}))) { |
895 | if (defined (my $buf = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
655 | $self->{wbuf} .= $buf; |
896 | $self->{wbuf} .= $buf; |
656 | $self->_drain_wbuf; |
897 | $self->_drain_wbuf; |
657 | } |
898 | } |
658 | |
899 | |
659 | while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) { |
900 | while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) { |
660 | $self->{rbuf} .= $buf; |
901 | $self->{rbuf} .= $buf; |
661 | $self->_drain_rbuf; |
902 | $self->_drain_rbuf; |
662 | } |
903 | } |
663 | |
904 | |
664 | if ( |
|
|
665 | (my $err = Net::SSLeay::get_error ($self->{tls}, -1)) |
905 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
|
|
906 | |
666 | != Net::SSLeay::ERROR_WANT_READ () |
907 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
667 | ) { |
|
|
668 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
908 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
669 | $self->error; |
909 | $self->error; |
670 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
910 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
671 | $! = &Errno::EIO; |
911 | $! = &Errno::EIO; |
672 | $self->error; |
912 | $self->error; |
… | |
… | |
674 | |
914 | |
675 | # all others are fine for our purposes |
915 | # all others are fine for our purposes |
676 | } |
916 | } |
677 | } |
917 | } |
678 | |
918 | |
|
|
919 | =item $handle->starttls ($tls[, $tls_ctx]) |
|
|
920 | |
|
|
921 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
|
|
922 | object is created, you can also do that at a later time by calling |
|
|
923 | C<starttls>. |
|
|
924 | |
|
|
925 | The first argument is the same as the C<tls> constructor argument (either |
|
|
926 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
|
|
927 | |
|
|
928 | The second argument is the optional C<Net::SSLeay::CTX> object that is |
|
|
929 | used when AnyEvent::Handle has to create its own TLS connection object. |
|
|
930 | |
|
|
931 | The TLS connection object will end up in C<< $handle->{tls} >> after this |
|
|
932 | call and can be used or changed to your liking. Note that the handshake |
|
|
933 | might have already started when this function returns. |
|
|
934 | |
|
|
935 | =cut |
|
|
936 | |
679 | # TODO: maybe document... |
937 | # TODO: maybe document... |
680 | sub starttls { |
938 | sub starttls { |
681 | my ($self, $ssl, $ctx) = @_; |
939 | my ($self, $ssl, $ctx) = @_; |
|
|
940 | |
|
|
941 | $self->stoptls; |
682 | |
942 | |
683 | if ($ssl eq "accept") { |
943 | if ($ssl eq "accept") { |
684 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
944 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
685 | Net::SSLeay::set_accept_state ($ssl); |
945 | Net::SSLeay::set_accept_state ($ssl); |
686 | } elsif ($ssl eq "connect") { |
946 | } elsif ($ssl eq "connect") { |
… | |
… | |
692 | |
952 | |
693 | # basically, this is deep magic (because SSL_read should have the same issues) |
953 | # basically, this is deep magic (because SSL_read should have the same issues) |
694 | # but the openssl maintainers basically said: "trust us, it just works". |
954 | # but the openssl maintainers basically said: "trust us, it just works". |
695 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
955 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
696 | # and mismaintained ssleay-module doesn't even offer them). |
956 | # and mismaintained ssleay-module doesn't even offer them). |
|
|
957 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
697 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
958 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
698 | (eval { Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
959 | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
699 | | (eval { Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
960 | | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
700 | |
961 | |
701 | $self->{tls_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
962 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
702 | $self->{tls_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
963 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
703 | |
964 | |
704 | Net::SSLeay::set_bio ($ssl, $self->{tls_rbio}, $self->{tls_wbio}); |
965 | Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio}); |
705 | |
966 | |
706 | $self->{filter_w} = sub { |
967 | $self->{filter_w} = sub { |
707 | $_[0]{tls_wbuf} .= ${$_[1]}; |
968 | $_[0]{_tls_wbuf} .= ${$_[1]}; |
708 | &_dotls; |
969 | &_dotls; |
709 | }; |
970 | }; |
710 | $self->{filter_r} = sub { |
971 | $self->{filter_r} = sub { |
711 | Net::SSLeay::BIO_write ($_[0]{tls_rbio}, ${$_[1]}); |
972 | Net::SSLeay::BIO_write ($_[0]{_rbio}, ${$_[1]}); |
712 | &_dotls; |
973 | &_dotls; |
713 | }; |
974 | }; |
714 | } |
975 | } |
715 | |
976 | |
|
|
977 | =item $handle->stoptls |
|
|
978 | |
|
|
979 | Destroys the SSL connection, if any. Partial read or write data will be |
|
|
980 | lost. |
|
|
981 | |
|
|
982 | =cut |
|
|
983 | |
|
|
984 | sub stoptls { |
|
|
985 | my ($self) = @_; |
|
|
986 | |
|
|
987 | Net::SSLeay::free (delete $self->{tls}) if $self->{tls}; |
|
|
988 | |
|
|
989 | delete $self->{_rbio}; |
|
|
990 | delete $self->{_wbio}; |
|
|
991 | delete $self->{_tls_wbuf}; |
|
|
992 | delete $self->{filter_r}; |
|
|
993 | delete $self->{filter_w}; |
|
|
994 | } |
|
|
995 | |
716 | sub DESTROY { |
996 | sub DESTROY { |
717 | my $self = shift; |
997 | my $self = shift; |
718 | |
998 | |
719 | Net::SSLeay::free (delete $self->{tls}) if $self->{tls}; |
999 | $self->stoptls; |
720 | } |
1000 | } |
721 | |
1001 | |
722 | =item AnyEvent::Handle::TLS_CTX |
1002 | =item AnyEvent::Handle::TLS_CTX |
723 | |
1003 | |
724 | This function creates and returns the Net::SSLeay::CTX object used by |
1004 | This function creates and returns the Net::SSLeay::CTX object used by |
… | |
… | |
754 | } |
1034 | } |
755 | } |
1035 | } |
756 | |
1036 | |
757 | =back |
1037 | =back |
758 | |
1038 | |
|
|
1039 | =head1 SUBCLASSING AnyEvent::Handle |
|
|
1040 | |
|
|
1041 | In many cases, you might want to subclass AnyEvent::Handle. |
|
|
1042 | |
|
|
1043 | To make this easier, a given version of AnyEvent::Handle uses these |
|
|
1044 | conventions: |
|
|
1045 | |
|
|
1046 | =over 4 |
|
|
1047 | |
|
|
1048 | =item * all constructor arguments become object members. |
|
|
1049 | |
|
|
1050 | At least initially, when you pass a C<tls>-argument to the constructor it |
|
|
1051 | will end up in C<< $handle->{tls} >>. Those members might be changes or |
|
|
1052 | mutated later on (for example C<tls> will hold the TLS connection object). |
|
|
1053 | |
|
|
1054 | =item * other object member names are prefixed with an C<_>. |
|
|
1055 | |
|
|
1056 | All object members not explicitly documented (internal use) are prefixed |
|
|
1057 | with an underscore character, so the remaining non-C<_>-namespace is free |
|
|
1058 | for use for subclasses. |
|
|
1059 | |
|
|
1060 | =item * all members not documented here and not prefixed with an underscore |
|
|
1061 | are free to use in subclasses. |
|
|
1062 | |
|
|
1063 | Of course, new versions of AnyEvent::Handle may introduce more "public" |
|
|
1064 | member variables, but thats just life, at least it is documented. |
|
|
1065 | |
|
|
1066 | =back |
|
|
1067 | |
759 | =head1 AUTHOR |
1068 | =head1 AUTHOR |
760 | |
1069 | |
761 | Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. |
1070 | Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. |
762 | |
1071 | |
763 | =cut |
1072 | =cut |