1 | package AnyEvent::Handle; |
1 | package AnyEvent::Handle; |
2 | |
2 | |
3 | no warnings; |
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4 | use strict qw(subs vars); |
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5 | |
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6 | use AnyEvent (); |
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7 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
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8 | use Scalar::Util (); |
3 | use Scalar::Util (); |
9 | use Carp (); |
4 | use Carp (); |
10 | use Fcntl (); |
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11 | use Errno qw(EAGAIN EINTR); |
5 | use Errno qw(EAGAIN EINTR); |
12 | |
6 | |
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7 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
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8 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
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9 | |
13 | =head1 NAME |
10 | =head1 NAME |
14 | |
11 | |
15 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
12 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
16 | |
13 | |
17 | =cut |
14 | =cut |
18 | |
15 | |
19 | our $VERSION = 4.45; |
16 | our $VERSION = 4.85; |
20 | |
17 | |
21 | =head1 SYNOPSIS |
18 | =head1 SYNOPSIS |
22 | |
19 | |
23 | use AnyEvent; |
20 | use AnyEvent; |
24 | use AnyEvent::Handle; |
21 | use AnyEvent::Handle; |
25 | |
22 | |
26 | my $cv = AnyEvent->condvar; |
23 | my $cv = AnyEvent->condvar; |
27 | |
24 | |
28 | my $handle = |
25 | my $hdl; $hdl = new AnyEvent::Handle |
29 | AnyEvent::Handle->new ( |
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30 | fh => \*STDIN, |
26 | fh => \*STDIN, |
31 | on_eof => sub { |
27 | on_error => sub { |
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28 | my ($hdl, $fatal, $msg) = @_; |
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29 | warn "got error $msg\n"; |
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30 | $hdl->destroy; |
32 | $cv->send; |
31 | $cv->send; |
33 | }, |
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34 | ); |
32 | ); |
35 | |
33 | |
36 | # send some request line |
34 | # send some request line |
37 | $handle->push_write ("getinfo\015\012"); |
35 | $hdl->push_write ("getinfo\015\012"); |
38 | |
36 | |
39 | # read the response line |
37 | # read the response line |
40 | $handle->push_read (line => sub { |
38 | $hdl->push_read (line => sub { |
41 | my ($handle, $line) = @_; |
39 | my ($hdl, $line) = @_; |
42 | warn "read line <$line>\n"; |
40 | warn "got line <$line>\n"; |
43 | $cv->send; |
41 | $cv->send; |
44 | }); |
42 | }); |
45 | |
43 | |
46 | $cv->recv; |
44 | $cv->recv; |
47 | |
45 | |
… | |
… | |
81 | |
79 | |
82 | =item on_eof => $cb->($handle) |
80 | =item on_eof => $cb->($handle) |
83 | |
81 | |
84 | Set the callback to be called when an end-of-file condition is detected, |
82 | Set the callback to be called when an end-of-file condition is detected, |
85 | i.e. in the case of a socket, when the other side has closed the |
83 | i.e. in the case of a socket, when the other side has closed the |
86 | connection cleanly. |
84 | connection cleanly, and there are no outstanding read requests in the |
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85 | queue (if there are read requests, then an EOF counts as an unexpected |
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86 | connection close and will be flagged as an error). |
87 | |
87 | |
88 | For sockets, this just means that the other side has stopped sending data, |
88 | For sockets, this just means that the other side has stopped sending data, |
89 | you can still try to write data, and, in fact, one can return from the EOF |
89 | you can still try to write data, and, in fact, one can return from the EOF |
90 | callback and continue writing data, as only the read part has been shut |
90 | callback and continue writing data, as only the read part has been shut |
91 | down. |
91 | down. |
92 | |
92 | |
93 | While not mandatory, it is I<highly> recommended to set an EOF callback, |
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94 | otherwise you might end up with a closed socket while you are still |
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95 | waiting for data. |
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96 | |
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97 | If an EOF condition has been detected but no C<on_eof> callback has been |
93 | If an EOF condition has been detected but no C<on_eof> callback has been |
98 | set, then a fatal error will be raised with C<$!> set to <0>. |
94 | set, then a fatal error will be raised with C<$!> set to <0>. |
99 | |
95 | |
100 | =item on_error => $cb->($handle, $fatal, $message) |
96 | =item on_error => $cb->($handle, $fatal, $message) |
101 | |
97 | |
102 | This is the error callback, which is called when, well, some error |
98 | This is the error callback, which is called when, well, some error |
103 | occured, such as not being able to resolve the hostname, failure to |
99 | occured, such as not being able to resolve the hostname, failure to |
104 | connect or a read error. |
100 | connect or a read error. |
105 | |
101 | |
106 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
102 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
107 | fatal errors the handle object will be shut down and will not be usable |
103 | fatal errors the handle object will be destroyed (by a call to C<< -> |
108 | (but you are free to look at the current C<< ->rbuf >>). Examples of fatal |
104 | destroy >>) after invoking the error callback (which means you are free to |
109 | errors are an EOF condition with active (but unsatisifable) read watchers |
105 | examine the handle object). Examples of fatal errors are an EOF condition |
110 | (C<EPIPE>) or I/O errors. |
106 | with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors. |
111 | |
107 | |
112 | AnyEvent::Handle tries to find an appropriate error code for you to check |
108 | AnyEvent::Handle tries to find an appropriate error code for you to check |
113 | against, but in some cases (TLS errors), this does not work well. It is |
109 | against, but in some cases (TLS errors), this does not work well. It is |
114 | recommended to always output the C<$message> argument in human-readable |
110 | recommended to always output the C<$message> argument in human-readable |
115 | error messages (it's usually the same as C<"$!">). |
111 | error messages (it's usually the same as C<"$!">). |
… | |
… | |
133 | and no read request is in the queue (unlike read queue callbacks, this |
129 | and no read request is in the queue (unlike read queue callbacks, this |
134 | callback will only be called when at least one octet of data is in the |
130 | callback will only be called when at least one octet of data is in the |
135 | read buffer). |
131 | read buffer). |
136 | |
132 | |
137 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
133 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
138 | method or access the C<$handle->{rbuf}> member directly. Note that you |
134 | method or access the C<< $handle->{rbuf} >> member directly. Note that you |
139 | must not enlarge or modify the read buffer, you can only remove data at |
135 | must not enlarge or modify the read buffer, you can only remove data at |
140 | the beginning from it. |
136 | the beginning from it. |
141 | |
137 | |
142 | When an EOF condition is detected then AnyEvent::Handle will first try to |
138 | When an EOF condition is detected then AnyEvent::Handle will first try to |
143 | feed all the remaining data to the queued callbacks and C<on_read> before |
139 | feed all the remaining data to the queued callbacks and C<on_read> before |
144 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
140 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
145 | error will be raised (with C<$!> set to C<EPIPE>). |
141 | error will be raised (with C<$!> set to C<EPIPE>). |
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142 | |
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143 | Note that, unlike requests in the read queue, an C<on_read> callback |
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144 | doesn't mean you I<require> some data: if there is an EOF and there |
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145 | are outstanding read requests then an error will be flagged. With an |
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146 | C<on_read> callback, the C<on_eof> callback will be invoked. |
146 | |
147 | |
147 | =item on_drain => $cb->($handle) |
148 | =item on_drain => $cb->($handle) |
148 | |
149 | |
149 | This sets the callback that is called when the write buffer becomes empty |
150 | This sets the callback that is called when the write buffer becomes empty |
150 | (or when the callback is set and the buffer is empty already). |
151 | (or when the callback is set and the buffer is empty already). |
… | |
… | |
245 | yet. This data will be lost. Calling the C<stoptls> method in time might |
246 | yet. This data will be lost. Calling the C<stoptls> method in time might |
246 | help. |
247 | help. |
247 | |
248 | |
248 | =item peername => $string |
249 | =item peername => $string |
249 | |
250 | |
250 | A string used to identify the remote site - usually the DNS hostname used |
251 | A string used to identify the remote site - usually the DNS hostname |
251 | to create the connection. |
252 | (I<not> IDN!) used to create the connection, rarely the IP address. |
252 | |
253 | |
253 | Apart from being useful in error messages, this string is also used in TLS |
254 | Apart from being useful in error messages, this string is also used in TLS |
254 | common name verification (see C<verify_cn> in L<AnyEvent::TLS>). |
255 | peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This |
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256 | verification will be skipped when C<peername> is not specified or |
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257 | C<undef>. |
255 | |
258 | |
256 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
259 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
257 | |
260 | |
258 | When this parameter is given, it enables TLS (SSL) mode, that means |
261 | When this parameter is given, it enables TLS (SSL) mode, that means |
259 | AnyEvent will start a TLS handshake as soon as the conenction has been |
262 | AnyEvent will start a TLS handshake as soon as the conenction has been |
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296 | |
299 | |
297 | Instead of an object, you can also specify a hash reference with C<< key |
300 | Instead of an object, you can also specify a hash reference with C<< key |
298 | => value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a |
301 | => value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a |
299 | new TLS context object. |
302 | new TLS context object. |
300 | |
303 | |
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304 | =item on_starttls => $cb->($handle, $success[, $error_message]) |
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305 | |
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306 | This callback will be invoked when the TLS/SSL handshake has finished. If |
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307 | C<$success> is true, then the TLS handshake succeeded, otherwise it failed |
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308 | (C<on_stoptls> will not be called in this case). |
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309 | |
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310 | The session in C<< $handle->{tls} >> can still be examined in this |
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311 | callback, even when the handshake was not successful. |
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312 | |
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313 | TLS handshake failures will not cause C<on_error> to be invoked when this |
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314 | callback is in effect, instead, the error message will be passed to C<on_starttls>. |
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315 | |
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316 | Without this callback, handshake failures lead to C<on_error> being |
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317 | called, as normal. |
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318 | |
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319 | Note that you cannot call C<starttls> right again in this callback. If you |
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320 | need to do that, start an zero-second timer instead whose callback can |
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321 | then call C<< ->starttls >> again. |
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322 | |
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323 | =item on_stoptls => $cb->($handle) |
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324 | |
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325 | When a SSLv3/TLS shutdown/close notify/EOF is detected and this callback is |
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326 | set, then it will be invoked after freeing the TLS session. If it is not, |
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327 | then a TLS shutdown condition will be treated like a normal EOF condition |
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328 | on the handle. |
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329 | |
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330 | The session in C<< $handle->{tls} >> can still be examined in this |
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331 | callback. |
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332 | |
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333 | This callback will only be called on TLS shutdowns, not when the |
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334 | underlying handle signals EOF. |
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335 | |
301 | =item json => JSON or JSON::XS object |
336 | =item json => JSON or JSON::XS object |
302 | |
337 | |
303 | This is the json coder object used by the C<json> read and write types. |
338 | This is the json coder object used by the C<json> read and write types. |
304 | |
339 | |
305 | If you don't supply it, then AnyEvent::Handle will create and use a |
340 | If you don't supply it, then AnyEvent::Handle will create and use a |
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327 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
362 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
328 | |
363 | |
329 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}) |
364 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}) |
330 | if $self->{tls}; |
365 | if $self->{tls}; |
331 | |
366 | |
332 | $self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain}; |
367 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
333 | |
368 | |
334 | $self->start_read |
369 | $self->start_read |
335 | if $self->{on_read}; |
370 | if $self->{on_read}; |
336 | |
371 | |
337 | $self->{fh} && $self |
372 | $self->{fh} && $self |
338 | } |
373 | } |
339 | |
374 | |
340 | sub _shutdown { |
375 | #sub _shutdown { |
341 | my ($self) = @_; |
376 | # my ($self) = @_; |
342 | |
377 | # |
343 | delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)}; |
378 | # delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)}; |
344 | $self->{_eof} = 1; # tell starttls et. al to stop trying |
379 | # $self->{_eof} = 1; # tell starttls et. al to stop trying |
345 | |
380 | # |
346 | &_freetls; |
381 | # &_freetls; |
347 | } |
382 | #} |
348 | |
383 | |
349 | sub _error { |
384 | sub _error { |
350 | my ($self, $errno, $fatal, $message) = @_; |
385 | my ($self, $errno, $fatal, $message) = @_; |
351 | |
386 | |
352 | $self->_shutdown |
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353 | if $fatal; |
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354 | |
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355 | $! = $errno; |
387 | $! = $errno; |
356 | $message ||= "$!"; |
388 | $message ||= "$!"; |
357 | |
389 | |
358 | if ($self->{on_error}) { |
390 | if ($self->{on_error}) { |
359 | $self->{on_error}($self, $fatal, $message); |
391 | $self->{on_error}($self, $fatal, $message); |
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392 | $self->destroy if $fatal; |
360 | } elsif ($self->{fh}) { |
393 | } elsif ($self->{fh}) { |
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394 | $self->destroy; |
361 | Carp::croak "AnyEvent::Handle uncaught error: $message"; |
395 | Carp::croak "AnyEvent::Handle uncaught error: $message"; |
362 | } |
396 | } |
363 | } |
397 | } |
364 | |
398 | |
365 | =item $fh = $handle->fh |
399 | =item $fh = $handle->fh |
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427 | local $SIG{__DIE__}; |
461 | local $SIG{__DIE__}; |
428 | setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]; |
462 | setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]; |
429 | }; |
463 | }; |
430 | } |
464 | } |
431 | |
465 | |
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466 | =item $handle->on_starttls ($cb) |
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467 | |
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468 | Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument). |
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469 | |
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470 | =cut |
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471 | |
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472 | sub on_starttls { |
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473 | $_[0]{on_starttls} = $_[1]; |
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474 | } |
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475 | |
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476 | =item $handle->on_stoptls ($cb) |
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477 | |
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478 | Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument). |
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479 | |
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480 | =cut |
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481 | |
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482 | sub on_starttls { |
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483 | $_[0]{on_stoptls} = $_[1]; |
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484 | } |
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485 | |
432 | ############################################################################# |
486 | ############################################################################# |
433 | |
487 | |
434 | =item $handle->timeout ($seconds) |
488 | =item $handle->timeout ($seconds) |
435 | |
489 | |
436 | Configures (or disables) the inactivity timeout. |
490 | Configures (or disables) the inactivity timeout. |
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460 | $self->{_activity} = $NOW; |
514 | $self->{_activity} = $NOW; |
461 | |
515 | |
462 | if ($self->{on_timeout}) { |
516 | if ($self->{on_timeout}) { |
463 | $self->{on_timeout}($self); |
517 | $self->{on_timeout}($self); |
464 | } else { |
518 | } else { |
465 | $self->_error (&Errno::ETIMEDOUT); |
519 | $self->_error (Errno::ETIMEDOUT); |
466 | } |
520 | } |
467 | |
521 | |
468 | # callback could have changed timeout value, optimise |
522 | # callback could have changed timeout value, optimise |
469 | return unless $self->{timeout}; |
523 | return unless $self->{timeout}; |
470 | |
524 | |
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533 | Scalar::Util::weaken $self; |
587 | Scalar::Util::weaken $self; |
534 | |
588 | |
535 | my $cb = sub { |
589 | my $cb = sub { |
536 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
590 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
537 | |
591 | |
538 | if ($len >= 0) { |
592 | if (defined $len) { |
539 | substr $self->{wbuf}, 0, $len, ""; |
593 | substr $self->{wbuf}, 0, $len, ""; |
540 | |
594 | |
541 | $self->{_activity} = AnyEvent->now; |
595 | $self->{_activity} = AnyEvent->now; |
542 | |
596 | |
543 | $self->{on_drain}($self) |
597 | $self->{on_drain}($self) |
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683 | |
737 | |
684 | =item $handle->push_shutdown |
738 | =item $handle->push_shutdown |
685 | |
739 | |
686 | Sometimes you know you want to close the socket after writing your data |
740 | Sometimes you know you want to close the socket after writing your data |
687 | before it was actually written. One way to do that is to replace your |
741 | before it was actually written. One way to do that is to replace your |
688 | C<on_drain> handler by a callback that shuts down the socket. This method |
742 | C<on_drain> handler by a callback that shuts down the socket (and set |
689 | is a shorthand for just that, and replaces the C<on_drain> callback with: |
743 | C<low_water_mark> to C<0>). This method is a shorthand for just that, and |
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744 | replaces the C<on_drain> callback with: |
690 | |
745 | |
691 | sub { shutdown $_[0]{fh}, 1 } # for push_shutdown |
746 | sub { shutdown $_[0]{fh}, 1 } # for push_shutdown |
692 | |
747 | |
693 | This simply shuts down the write side and signals an EOF condition to the |
748 | This simply shuts down the write side and signals an EOF condition to the |
694 | the peer. |
749 | the peer. |
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697 | afterwards. This is the cleanest way to close a connection. |
752 | afterwards. This is the cleanest way to close a connection. |
698 | |
753 | |
699 | =cut |
754 | =cut |
700 | |
755 | |
701 | sub push_shutdown { |
756 | sub push_shutdown { |
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757 | my ($self) = @_; |
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758 | |
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759 | delete $self->{low_water_mark}; |
702 | $_[0]->{on_drain} = sub { shutdown $_[0]{fh}, 1 }; |
760 | $self->on_drain (sub { shutdown $_[0]{fh}, 1 }); |
703 | } |
761 | } |
704 | |
762 | |
705 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
763 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
706 | |
764 | |
707 | This function (not method) lets you add your own types to C<push_write>. |
765 | This function (not method) lets you add your own types to C<push_write>. |
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808 | |
866 | |
809 | if ( |
867 | if ( |
810 | defined $self->{rbuf_max} |
868 | defined $self->{rbuf_max} |
811 | && $self->{rbuf_max} < length $self->{rbuf} |
869 | && $self->{rbuf_max} < length $self->{rbuf} |
812 | ) { |
870 | ) { |
813 | $self->_error (&Errno::ENOSPC, 1), return; |
871 | $self->_error (Errno::ENOSPC, 1), return; |
814 | } |
872 | } |
815 | |
873 | |
816 | while () { |
874 | while () { |
817 | # we need to use a separate tls read buffer, as we must not receive data while |
875 | # we need to use a separate tls read buffer, as we must not receive data while |
818 | # we are draining the buffer, and this can only happen with TLS. |
876 | # we are draining the buffer, and this can only happen with TLS. |
… | |
… | |
822 | |
880 | |
823 | if (my $cb = shift @{ $self->{_queue} }) { |
881 | if (my $cb = shift @{ $self->{_queue} }) { |
824 | unless ($cb->($self)) { |
882 | unless ($cb->($self)) { |
825 | if ($self->{_eof}) { |
883 | if ($self->{_eof}) { |
826 | # no progress can be made (not enough data and no data forthcoming) |
884 | # no progress can be made (not enough data and no data forthcoming) |
827 | $self->_error (&Errno::EPIPE, 1), return; |
885 | $self->_error (Errno::EPIPE, 1), return; |
828 | } |
886 | } |
829 | |
887 | |
830 | unshift @{ $self->{_queue} }, $cb; |
888 | unshift @{ $self->{_queue} }, $cb; |
831 | last; |
889 | last; |
832 | } |
890 | } |
… | |
… | |
840 | && !@{ $self->{_queue} } # and the queue is still empty |
898 | && !@{ $self->{_queue} } # and the queue is still empty |
841 | && $self->{on_read} # but we still have on_read |
899 | && $self->{on_read} # but we still have on_read |
842 | ) { |
900 | ) { |
843 | # no further data will arrive |
901 | # no further data will arrive |
844 | # so no progress can be made |
902 | # so no progress can be made |
845 | $self->_error (&Errno::EPIPE, 1), return |
903 | $self->_error (Errno::EPIPE, 1), return |
846 | if $self->{_eof}; |
904 | if $self->{_eof}; |
847 | |
905 | |
848 | last; # more data might arrive |
906 | last; # more data might arrive |
849 | } |
907 | } |
850 | } else { |
908 | } else { |
… | |
… | |
856 | |
914 | |
857 | if ($self->{_eof}) { |
915 | if ($self->{_eof}) { |
858 | if ($self->{on_eof}) { |
916 | if ($self->{on_eof}) { |
859 | $self->{on_eof}($self) |
917 | $self->{on_eof}($self) |
860 | } else { |
918 | } else { |
861 | $self->_error (0, 1); |
919 | $self->_error (0, 1, "Unexpected end-of-file"); |
862 | } |
920 | } |
863 | } |
921 | } |
864 | |
922 | |
865 | # may need to restart read watcher |
923 | # may need to restart read watcher |
866 | unless ($self->{_rw}) { |
924 | unless ($self->{_rw}) { |
… | |
… | |
1100 | return 1; |
1158 | return 1; |
1101 | } |
1159 | } |
1102 | |
1160 | |
1103 | # reject |
1161 | # reject |
1104 | if ($reject && $$rbuf =~ $reject) { |
1162 | if ($reject && $$rbuf =~ $reject) { |
1105 | $self->_error (&Errno::EBADMSG); |
1163 | $self->_error (Errno::EBADMSG); |
1106 | } |
1164 | } |
1107 | |
1165 | |
1108 | # skip |
1166 | # skip |
1109 | if ($skip && $$rbuf =~ $skip) { |
1167 | if ($skip && $$rbuf =~ $skip) { |
1110 | $data .= substr $$rbuf, 0, $+[0], ""; |
1168 | $data .= substr $$rbuf, 0, $+[0], ""; |
… | |
… | |
1126 | my ($self, $cb) = @_; |
1184 | my ($self, $cb) = @_; |
1127 | |
1185 | |
1128 | sub { |
1186 | sub { |
1129 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
1187 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
1130 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
1188 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
1131 | $self->_error (&Errno::EBADMSG); |
1189 | $self->_error (Errno::EBADMSG); |
1132 | } |
1190 | } |
1133 | return; |
1191 | return; |
1134 | } |
1192 | } |
1135 | |
1193 | |
1136 | my $len = $1; |
1194 | my $len = $1; |
… | |
… | |
1139 | my $string = $_[1]; |
1197 | my $string = $_[1]; |
1140 | $_[0]->unshift_read (chunk => 1, sub { |
1198 | $_[0]->unshift_read (chunk => 1, sub { |
1141 | if ($_[1] eq ",") { |
1199 | if ($_[1] eq ",") { |
1142 | $cb->($_[0], $string); |
1200 | $cb->($_[0], $string); |
1143 | } else { |
1201 | } else { |
1144 | $self->_error (&Errno::EBADMSG); |
1202 | $self->_error (Errno::EBADMSG); |
1145 | } |
1203 | } |
1146 | }); |
1204 | }); |
1147 | }); |
1205 | }); |
1148 | |
1206 | |
1149 | 1 |
1207 | 1 |
… | |
… | |
1216 | =cut |
1274 | =cut |
1217 | |
1275 | |
1218 | register_read_type json => sub { |
1276 | register_read_type json => sub { |
1219 | my ($self, $cb) = @_; |
1277 | my ($self, $cb) = @_; |
1220 | |
1278 | |
1221 | require JSON; |
1279 | my $json = $self->{json} ||= |
|
|
1280 | eval { require JSON::XS; JSON::XS->new->utf8 } |
|
|
1281 | || do { require JSON; JSON->new->utf8 }; |
1222 | |
1282 | |
1223 | my $data; |
1283 | my $data; |
1224 | my $rbuf = \$self->{rbuf}; |
1284 | my $rbuf = \$self->{rbuf}; |
1225 | |
|
|
1226 | my $json = $self->{json} ||= JSON->new->utf8; |
|
|
1227 | |
1285 | |
1228 | sub { |
1286 | sub { |
1229 | my $ref = eval { $json->incr_parse ($self->{rbuf}) }; |
1287 | my $ref = eval { $json->incr_parse ($self->{rbuf}) }; |
1230 | |
1288 | |
1231 | if ($ref) { |
1289 | if ($ref) { |
… | |
… | |
1239 | $json->incr_skip; |
1297 | $json->incr_skip; |
1240 | |
1298 | |
1241 | $self->{rbuf} = $json->incr_text; |
1299 | $self->{rbuf} = $json->incr_text; |
1242 | $json->incr_text = ""; |
1300 | $json->incr_text = ""; |
1243 | |
1301 | |
1244 | $self->_error (&Errno::EBADMSG); |
1302 | $self->_error (Errno::EBADMSG); |
1245 | |
1303 | |
1246 | () |
1304 | () |
1247 | } else { |
1305 | } else { |
1248 | $self->{rbuf} = ""; |
1306 | $self->{rbuf} = ""; |
1249 | |
1307 | |
… | |
… | |
1286 | # read remaining chunk |
1344 | # read remaining chunk |
1287 | $_[0]->unshift_read (chunk => $len, sub { |
1345 | $_[0]->unshift_read (chunk => $len, sub { |
1288 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1346 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1289 | $cb->($_[0], $ref); |
1347 | $cb->($_[0], $ref); |
1290 | } else { |
1348 | } else { |
1291 | $self->_error (&Errno::EBADMSG); |
1349 | $self->_error (Errno::EBADMSG); |
1292 | } |
1350 | } |
1293 | }); |
1351 | }); |
1294 | } |
1352 | } |
1295 | |
1353 | |
1296 | 1 |
1354 | 1 |
… | |
… | |
1377 | } |
1435 | } |
1378 | } |
1436 | } |
1379 | |
1437 | |
1380 | our $ERROR_SYSCALL; |
1438 | our $ERROR_SYSCALL; |
1381 | our $ERROR_WANT_READ; |
1439 | our $ERROR_WANT_READ; |
1382 | our $ERROR_ZERO_RETURN; |
|
|
1383 | |
1440 | |
1384 | sub _tls_error { |
1441 | sub _tls_error { |
1385 | my ($self, $err) = @_; |
1442 | my ($self, $err) = @_; |
1386 | warn "$err,$!\n";#d# |
|
|
1387 | |
1443 | |
1388 | return $self->_error ($!, 1) |
1444 | return $self->_error ($!, 1) |
1389 | if $err == Net::SSLeay::ERROR_SYSCALL (); |
1445 | if $err == Net::SSLeay::ERROR_SYSCALL (); |
1390 | |
1446 | |
|
|
1447 | my $err =Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ()); |
|
|
1448 | |
|
|
1449 | # reduce error string to look less scary |
|
|
1450 | $err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /; |
|
|
1451 | |
|
|
1452 | if ($self->{_on_starttls}) { |
|
|
1453 | (delete $self->{_on_starttls})->($self, undef, $err); |
|
|
1454 | &_freetls; |
|
|
1455 | } else { |
|
|
1456 | &_freetls; |
1391 | $self->_error (&Errno::EPROTO, 1, |
1457 | $self->_error (Errno::EPROTO, 1, $err); |
1392 | Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ())); |
1458 | } |
1393 | } |
1459 | } |
1394 | |
1460 | |
1395 | # poll the write BIO and send the data if applicable |
1461 | # poll the write BIO and send the data if applicable |
1396 | # also decode read data if possible |
1462 | # also decode read data if possible |
1397 | # this is basiclaly our TLS state machine |
1463 | # this is basiclaly our TLS state machine |
… | |
… | |
1408 | } |
1474 | } |
1409 | |
1475 | |
1410 | $tmp = Net::SSLeay::get_error ($self->{tls}, $tmp); |
1476 | $tmp = Net::SSLeay::get_error ($self->{tls}, $tmp); |
1411 | return $self->_tls_error ($tmp) |
1477 | return $self->_tls_error ($tmp) |
1412 | if $tmp != $ERROR_WANT_READ |
1478 | if $tmp != $ERROR_WANT_READ |
1413 | && ($tmp != $ERROR_SYSCALL || $!) |
1479 | && ($tmp != $ERROR_SYSCALL || $!); |
1414 | && $tmp != $ERROR_ZERO_RETURN; |
|
|
1415 | } |
1480 | } |
1416 | |
1481 | |
1417 | while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) { |
1482 | while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) { |
1418 | unless (length $tmp) { |
1483 | unless (length $tmp) { |
1419 | # let's treat SSL-eof as we treat normal EOF |
1484 | $self->{_on_starttls} |
1420 | delete $self->{_rw}; |
1485 | and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ??? |
1421 | $self->{_eof} = 1; |
|
|
1422 | &_freetls; |
1486 | &_freetls; |
|
|
1487 | |
|
|
1488 | if ($self->{on_stoptls}) { |
|
|
1489 | $self->{on_stoptls}($self); |
|
|
1490 | return; |
|
|
1491 | } else { |
|
|
1492 | # let's treat SSL-eof as we treat normal EOF |
|
|
1493 | delete $self->{_rw}; |
|
|
1494 | $self->{_eof} = 1; |
|
|
1495 | } |
1423 | } |
1496 | } |
1424 | |
1497 | |
1425 | $self->{_tls_rbuf} .= $tmp; |
1498 | $self->{_tls_rbuf} .= $tmp; |
1426 | $self->_drain_rbuf unless $self->{_in_drain}; |
1499 | $self->_drain_rbuf unless $self->{_in_drain}; |
1427 | $self->{tls} or return; # tls session might have gone away in callback |
1500 | $self->{tls} or return; # tls session might have gone away in callback |
1428 | } |
1501 | } |
1429 | |
1502 | |
1430 | $tmp = Net::SSLeay::get_error ($self->{tls}, -1); |
1503 | $tmp = Net::SSLeay::get_error ($self->{tls}, -1); |
1431 | return $self->_tls_error ($tmp) |
1504 | return $self->_tls_error ($tmp) |
1432 | if $tmp != $ERROR_WANT_READ |
1505 | if $tmp != $ERROR_WANT_READ |
1433 | && ($tmp != $ERROR_SYSCALL || $!) |
1506 | && ($tmp != $ERROR_SYSCALL || $!); |
1434 | && $tmp != $ERROR_ZERO_RETURN; |
|
|
1435 | |
1507 | |
1436 | while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1508 | while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1437 | $self->{wbuf} .= $tmp; |
1509 | $self->{wbuf} .= $tmp; |
1438 | $self->_drain_wbuf; |
1510 | $self->_drain_wbuf; |
1439 | } |
1511 | } |
|
|
1512 | |
|
|
1513 | $self->{_on_starttls} |
|
|
1514 | and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK () |
|
|
1515 | and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established"); |
1440 | } |
1516 | } |
1441 | |
1517 | |
1442 | =item $handle->starttls ($tls[, $tls_ctx]) |
1518 | =item $handle->starttls ($tls[, $tls_ctx]) |
1443 | |
1519 | |
1444 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
1520 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
… | |
… | |
1461 | If it an error to start a TLS handshake more than once per |
1537 | If it an error to start a TLS handshake more than once per |
1462 | AnyEvent::Handle object (this is due to bugs in OpenSSL). |
1538 | AnyEvent::Handle object (this is due to bugs in OpenSSL). |
1463 | |
1539 | |
1464 | =cut |
1540 | =cut |
1465 | |
1541 | |
|
|
1542 | our %TLS_CACHE; #TODO not yet documented, should we? |
|
|
1543 | |
1466 | sub starttls { |
1544 | sub starttls { |
1467 | my ($self, $ssl, $ctx) = @_; |
1545 | my ($self, $ssl, $ctx) = @_; |
1468 | |
1546 | |
1469 | require Net::SSLeay; |
1547 | require Net::SSLeay; |
1470 | |
1548 | |
1471 | Carp::croak "it is an error to call starttls more than once on an AnyEvent::Handle object" |
1549 | Carp::croak "it is an error to call starttls more than once on an AnyEvent::Handle object" |
1472 | if $self->{tls}; |
1550 | if $self->{tls}; |
1473 | |
1551 | |
1474 | $ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL (); |
1552 | $ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL (); |
1475 | $ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ (); |
1553 | $ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ (); |
1476 | $ERROR_ZERO_RETURN = Net::SSLeay::ERROR_ZERO_RETURN (); |
|
|
1477 | |
1554 | |
1478 | $ctx ||= $self->{tls_ctx}; |
1555 | $ctx ||= $self->{tls_ctx}; |
1479 | |
1556 | |
1480 | if ("HASH" eq ref $ctx) { |
1557 | if ("HASH" eq ref $ctx) { |
1481 | require AnyEvent::TLS; |
1558 | require AnyEvent::TLS; |
1482 | |
1559 | |
1483 | local $Carp::CarpLevel = 1; # skip ourselves when creating a new context |
1560 | local $Carp::CarpLevel = 1; # skip ourselves when creating a new context |
|
|
1561 | |
|
|
1562 | if ($ctx->{cache}) { |
|
|
1563 | my $key = $ctx+0; |
|
|
1564 | $ctx = $TLS_CACHE{$key} ||= new AnyEvent::TLS %$ctx; |
|
|
1565 | } else { |
1484 | $ctx = new AnyEvent::TLS %$ctx; |
1566 | $ctx = new AnyEvent::TLS %$ctx; |
|
|
1567 | } |
1485 | } |
1568 | } |
1486 | |
1569 | |
1487 | $self->{tls_ctx} = $ctx || TLS_CTX (); |
1570 | $self->{tls_ctx} = $ctx || TLS_CTX (); |
1488 | $self->{tls} = $ssl = $self->{tls_ctx}->_get_session ($ssl, $self, $self->{peername}); |
1571 | $self->{tls} = $ssl = $self->{tls_ctx}->_get_session ($ssl, $self, $self->{peername}); |
1489 | |
1572 | |
… | |
… | |
1507 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1590 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1508 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1591 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1509 | |
1592 | |
1510 | Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio}); |
1593 | Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio}); |
1511 | |
1594 | |
|
|
1595 | $self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) } |
|
|
1596 | if $self->{on_starttls}; |
|
|
1597 | |
1512 | &_dotls; # need to trigger the initial handshake |
1598 | &_dotls; # need to trigger the initial handshake |
1513 | $self->start_read; # make sure we actually do read |
1599 | $self->start_read; # make sure we actually do read |
1514 | } |
1600 | } |
1515 | |
1601 | |
1516 | =item $handle->stoptls |
1602 | =item $handle->stoptls |
… | |
… | |
1528 | if ($self->{tls}) { |
1614 | if ($self->{tls}) { |
1529 | Net::SSLeay::shutdown ($self->{tls}); |
1615 | Net::SSLeay::shutdown ($self->{tls}); |
1530 | |
1616 | |
1531 | &_dotls; |
1617 | &_dotls; |
1532 | |
1618 | |
1533 | # we don't give a shit. no, we do, but we can't. no... |
1619 | # # we don't give a shit. no, we do, but we can't. no...#d# |
1534 | # we, we... have to use openssl :/ |
1620 | # # we, we... have to use openssl :/#d# |
1535 | &_freetls; |
1621 | # &_freetls;#d# |
1536 | } |
1622 | } |
1537 | } |
1623 | } |
1538 | |
1624 | |
1539 | sub _freetls { |
1625 | sub _freetls { |
1540 | my ($self) = @_; |
1626 | my ($self) = @_; |
1541 | |
1627 | |
1542 | return unless $self->{tls}; |
1628 | return unless $self->{tls}; |
1543 | |
1629 | |
1544 | $self->{tls_ctx}->_put_session (delete $self->{tls}); |
1630 | $self->{tls_ctx}->_put_session (delete $self->{tls}); |
1545 | |
1631 | |
1546 | delete @$self{qw(_rbio _wbio _tls_wbuf)}; |
1632 | delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)}; |
1547 | } |
1633 | } |
1548 | |
1634 | |
1549 | sub DESTROY { |
1635 | sub DESTROY { |
1550 | my ($self) = @_; |
1636 | my ($self) = @_; |
1551 | |
1637 | |
… | |
… | |
1575 | } |
1661 | } |
1576 | |
1662 | |
1577 | =item $handle->destroy |
1663 | =item $handle->destroy |
1578 | |
1664 | |
1579 | Shuts down the handle object as much as possible - this call ensures that |
1665 | Shuts down the handle object as much as possible - this call ensures that |
1580 | no further callbacks will be invoked and resources will be freed as much |
1666 | no further callbacks will be invoked and as many resources as possible |
1581 | as possible. You must not call any methods on the object afterwards. |
1667 | will be freed. You must not call any methods on the object afterwards. |
1582 | |
1668 | |
1583 | Normally, you can just "forget" any references to an AnyEvent::Handle |
1669 | Normally, you can just "forget" any references to an AnyEvent::Handle |
1584 | object and it will simply shut down. This works in fatal error and EOF |
1670 | object and it will simply shut down. This works in fatal error and EOF |
1585 | callbacks, as well as code outside. It does I<NOT> work in a read or write |
1671 | callbacks, as well as code outside. It does I<NOT> work in a read or write |
1586 | callback, so when you want to destroy the AnyEvent::Handle object from |
1672 | callback, so when you want to destroy the AnyEvent::Handle object from |
1587 | within such an callback. You I<MUST> call C<< ->destroy >> explicitly in |
1673 | within such an callback. You I<MUST> call C<< ->destroy >> explicitly in |
1588 | that case. |
1674 | that case. |
1589 | |
1675 | |
|
|
1676 | Destroying the handle object in this way has the advantage that callbacks |
|
|
1677 | will be removed as well, so if those are the only reference holders (as |
|
|
1678 | is common), then one doesn't need to do anything special to break any |
|
|
1679 | reference cycles. |
|
|
1680 | |
1590 | The handle might still linger in the background and write out remaining |
1681 | The handle might still linger in the background and write out remaining |
1591 | data, as specified by the C<linger> option, however. |
1682 | data, as specified by the C<linger> option, however. |
1592 | |
1683 | |
1593 | =cut |
1684 | =cut |
1594 | |
1685 | |
… | |
… | |
1661 | |
1752 | |
1662 | $handle->on_read (sub { }); |
1753 | $handle->on_read (sub { }); |
1663 | $handle->on_eof (undef); |
1754 | $handle->on_eof (undef); |
1664 | $handle->on_error (sub { |
1755 | $handle->on_error (sub { |
1665 | my $data = delete $_[0]{rbuf}; |
1756 | my $data = delete $_[0]{rbuf}; |
1666 | undef $handle; |
|
|
1667 | }); |
1757 | }); |
1668 | |
1758 | |
1669 | The reason to use C<on_error> is that TCP connections, due to latencies |
1759 | The reason to use C<on_error> is that TCP connections, due to latencies |
1670 | and packets loss, might get closed quite violently with an error, when in |
1760 | and packets loss, might get closed quite violently with an error, when in |
1671 | fact, all data has been received. |
1761 | fact, all data has been received. |
… | |
… | |
1687 | $handle->on_drain (sub { |
1777 | $handle->on_drain (sub { |
1688 | warn "all data submitted to the kernel\n"; |
1778 | warn "all data submitted to the kernel\n"; |
1689 | undef $handle; |
1779 | undef $handle; |
1690 | }); |
1780 | }); |
1691 | |
1781 | |
|
|
1782 | If you just want to queue some data and then signal EOF to the other side, |
|
|
1783 | consider using C<< ->push_shutdown >> instead. |
|
|
1784 | |
|
|
1785 | =item I want to contact a TLS/SSL server, I don't care about security. |
|
|
1786 | |
|
|
1787 | If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS, |
|
|
1788 | simply connect to it and then create the AnyEvent::Handle with the C<tls> |
|
|
1789 | parameter: |
|
|
1790 | |
|
|
1791 | tcp_connect $host, $port, sub { |
|
|
1792 | my ($fh) = @_; |
|
|
1793 | |
|
|
1794 | my $handle = new AnyEvent::Handle |
|
|
1795 | fh => $fh, |
|
|
1796 | tls => "connect", |
|
|
1797 | on_error => sub { ... }; |
|
|
1798 | |
|
|
1799 | $handle->push_write (...); |
|
|
1800 | }; |
|
|
1801 | |
|
|
1802 | =item I want to contact a TLS/SSL server, I do care about security. |
|
|
1803 | |
|
|
1804 | Then you should additionally enable certificate verification, including |
|
|
1805 | peername verification, if the protocol you use supports it (see |
|
|
1806 | L<AnyEvent::TLS>, C<verify_peername>). |
|
|
1807 | |
|
|
1808 | E.g. for HTTPS: |
|
|
1809 | |
|
|
1810 | tcp_connect $host, $port, sub { |
|
|
1811 | my ($fh) = @_; |
|
|
1812 | |
|
|
1813 | my $handle = new AnyEvent::Handle |
|
|
1814 | fh => $fh, |
|
|
1815 | peername => $host, |
|
|
1816 | tls => "connect", |
|
|
1817 | tls_ctx => { verify => 1, verify_peername => "https" }, |
|
|
1818 | ... |
|
|
1819 | |
|
|
1820 | Note that you must specify the hostname you connected to (or whatever |
|
|
1821 | "peername" the protocol needs) as the C<peername> argument, otherwise no |
|
|
1822 | peername verification will be done. |
|
|
1823 | |
|
|
1824 | The above will use the system-dependent default set of trusted CA |
|
|
1825 | certificates. If you want to check against a specific CA, add the |
|
|
1826 | C<ca_file> (or C<ca_cert>) arguments to C<tls_ctx>: |
|
|
1827 | |
|
|
1828 | tls_ctx => { |
|
|
1829 | verify => 1, |
|
|
1830 | verify_peername => "https", |
|
|
1831 | ca_file => "my-ca-cert.pem", |
|
|
1832 | }, |
|
|
1833 | |
|
|
1834 | =item I want to create a TLS/SSL server, how do I do that? |
|
|
1835 | |
|
|
1836 | Well, you first need to get a server certificate and key. You have |
|
|
1837 | three options: a) ask a CA (buy one, use cacert.org etc.) b) create a |
|
|
1838 | self-signed certificate (cheap. check the search engine of your choice, |
|
|
1839 | there are many tutorials on the net) or c) make your own CA (tinyca2 is a |
|
|
1840 | nice program for that purpose). |
|
|
1841 | |
|
|
1842 | Then create a file with your private key (in PEM format, see |
|
|
1843 | L<AnyEvent::TLS>), followed by the certificate (also in PEM format). The |
|
|
1844 | file should then look like this: |
|
|
1845 | |
|
|
1846 | -----BEGIN RSA PRIVATE KEY----- |
|
|
1847 | ...header data |
|
|
1848 | ... lots of base64'y-stuff |
|
|
1849 | -----END RSA PRIVATE KEY----- |
|
|
1850 | |
|
|
1851 | -----BEGIN CERTIFICATE----- |
|
|
1852 | ... lots of base64'y-stuff |
|
|
1853 | -----END CERTIFICATE----- |
|
|
1854 | |
|
|
1855 | The important bits are the "PRIVATE KEY" and "CERTIFICATE" parts. Then |
|
|
1856 | specify this file as C<cert_file>: |
|
|
1857 | |
|
|
1858 | tcp_server undef, $port, sub { |
|
|
1859 | my ($fh) = @_; |
|
|
1860 | |
|
|
1861 | my $handle = new AnyEvent::Handle |
|
|
1862 | fh => $fh, |
|
|
1863 | tls => "accept", |
|
|
1864 | tls_ctx => { cert_file => "my-server-keycert.pem" }, |
|
|
1865 | ... |
|
|
1866 | |
|
|
1867 | When you have intermediate CA certificates that your clients might not |
|
|
1868 | know about, just append them to the C<cert_file>. |
|
|
1869 | |
1692 | =back |
1870 | =back |
1693 | |
1871 | |
1694 | |
1872 | |
1695 | =head1 SUBCLASSING AnyEvent::Handle |
1873 | =head1 SUBCLASSING AnyEvent::Handle |
1696 | |
1874 | |