1 | package AnyEvent::Handle; |
1 | package AnyEvent::Handle; |
2 | |
2 | |
3 | no warnings; |
3 | no warnings; |
4 | use strict; |
4 | use strict qw(subs vars); |
5 | |
5 | |
6 | use AnyEvent (); |
6 | use AnyEvent (); |
7 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
7 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
8 | use Scalar::Util (); |
8 | use Scalar::Util (); |
9 | use Carp (); |
9 | use Carp (); |
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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 | =cut |
17 | =cut |
18 | |
18 | |
19 | our $VERSION = 4.13; |
19 | our $VERSION = 4.22; |
20 | |
20 | |
21 | =head1 SYNOPSIS |
21 | =head1 SYNOPSIS |
22 | |
22 | |
23 | use AnyEvent; |
23 | use AnyEvent; |
24 | use AnyEvent::Handle; |
24 | use AnyEvent::Handle; |
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75 | NOTE: The filehandle will be set to non-blocking (using |
75 | NOTE: The filehandle will be set to non-blocking (using |
76 | AnyEvent::Util::fh_nonblocking). |
76 | AnyEvent::Util::fh_nonblocking). |
77 | |
77 | |
78 | =item on_eof => $cb->($handle) |
78 | =item on_eof => $cb->($handle) |
79 | |
79 | |
80 | Set the callback to be called when an end-of-file condition is detcted, |
80 | Set the callback to be called when an end-of-file condition is detected, |
81 | i.e. in the case of a socket, when the other side has closed the |
81 | i.e. in the case of a socket, when the other side has closed the |
82 | connection cleanly. |
82 | connection cleanly. |
83 | |
83 | |
84 | While not mandatory, it is highly recommended to set an eof callback, |
84 | While not mandatory, it is I<highly> recommended to set an eof callback, |
85 | otherwise you might end up with a closed socket while you are still |
85 | otherwise you might end up with a closed socket while you are still |
86 | waiting for data. |
86 | waiting for data. |
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87 | |
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88 | If an EOF condition has been detected but no C<on_eof> callback has been |
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89 | set, then a fatal error will be raised with C<$!> set to <0>. |
87 | |
90 | |
88 | =item on_error => $cb->($handle, $fatal) |
91 | =item on_error => $cb->($handle, $fatal) |
89 | |
92 | |
90 | This is the error callback, which is called when, well, some error |
93 | This is the error callback, which is called when, well, some error |
91 | occured, such as not being able to resolve the hostname, failure to |
94 | occured, such as not being able to resolve the hostname, failure to |
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105 | C<croak>. |
108 | C<croak>. |
106 | |
109 | |
107 | =item on_read => $cb->($handle) |
110 | =item on_read => $cb->($handle) |
108 | |
111 | |
109 | This sets the default read callback, which is called when data arrives |
112 | This sets the default read callback, which is called when data arrives |
110 | and no read request is in the queue. |
113 | and no read request is in the queue (unlike read queue callbacks, this |
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114 | callback will only be called when at least one octet of data is in the |
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115 | read buffer). |
111 | |
116 | |
112 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
117 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
113 | method or access the C<$handle->{rbuf}> member directly. |
118 | method or access the C<$handle->{rbuf}> member directly. |
114 | |
119 | |
115 | When an EOF condition is detected then AnyEvent::Handle will first try to |
120 | When an EOF condition is detected then AnyEvent::Handle will first try to |
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121 | |
126 | |
122 | This sets the callback that is called when the write buffer becomes empty |
127 | This sets the callback that is called when the write buffer becomes empty |
123 | (or when the callback is set and the buffer is empty already). |
128 | (or when the callback is set and the buffer is empty already). |
124 | |
129 | |
125 | To append to the write buffer, use the C<< ->push_write >> method. |
130 | To append to the write buffer, use the C<< ->push_write >> method. |
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131 | |
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132 | This callback is useful when you don't want to put all of your write data |
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133 | into the queue at once, for example, when you want to write the contents |
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134 | of some file to the socket you might not want to read the whole file into |
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135 | memory and push it into the queue, but instead only read more data from |
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136 | the file when the write queue becomes empty. |
126 | |
137 | |
127 | =item timeout => $fractional_seconds |
138 | =item timeout => $fractional_seconds |
128 | |
139 | |
129 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
140 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
130 | seconds pass without a successful read or write on the underlying file |
141 | seconds pass without a successful read or write on the underlying file |
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154 | be configured to accept only so-and-so much data that it cannot act on |
165 | be configured to accept only so-and-so much data that it cannot act on |
155 | (for example, when expecting a line, an attacker could send an unlimited |
166 | (for example, when expecting a line, an attacker could send an unlimited |
156 | amount of data without a callback ever being called as long as the line |
167 | amount of data without a callback ever being called as long as the line |
157 | isn't finished). |
168 | isn't finished). |
158 | |
169 | |
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170 | =item autocork => <boolean> |
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171 | |
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172 | When disabled (the default), then C<push_write> will try to immediately |
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173 | write the data to the handle if possible. This avoids having to register |
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174 | a write watcher and wait for the next event loop iteration, but can be |
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175 | inefficient if you write multiple small chunks (this disadvantage is |
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176 | usually avoided by your kernel's nagle algorithm, see C<low_delay>). |
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177 | |
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178 | When enabled, then writes will always be queued till the next event loop |
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179 | iteration. This is efficient when you do many small writes per iteration, |
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180 | but less efficient when you do a single write only. |
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181 | |
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182 | =item no_delay => <boolean> |
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183 | |
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184 | When doing small writes on sockets, your operating system kernel might |
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185 | wait a bit for more data before actually sending it out. This is called |
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186 | the Nagle algorithm, and usually it is beneficial. |
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187 | |
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188 | In some situations you want as low a delay as possible, which cna be |
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189 | accomplishd by setting this option to true. |
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190 | |
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191 | The default is your opertaing system's default behaviour, this option |
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192 | explicitly enables or disables it, if possible. |
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193 | |
159 | =item read_size => <bytes> |
194 | =item read_size => <bytes> |
160 | |
195 | |
161 | The default read block size (the amount of bytes this module will try to read |
196 | The default read block size (the amount of bytes this module will try to read |
162 | during each (loop iteration). Default: C<8192>. |
197 | during each (loop iteration). Default: C<8192>. |
163 | |
198 | |
164 | =item low_water_mark => <bytes> |
199 | =item low_water_mark => <bytes> |
165 | |
200 | |
166 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
201 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
167 | buffer: If the write reaches this size or gets even samller it is |
202 | buffer: If the write reaches this size or gets even samller it is |
168 | considered empty. |
203 | considered empty. |
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204 | |
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205 | =item linger => <seconds> |
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206 | |
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207 | If non-zero (default: C<3600>), then the destructor of the |
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208 | AnyEvent::Handle object will check wether there is still outstanding write |
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209 | data and will install a watcher that will write out this data. No errors |
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210 | will be reported (this mostly matches how the operating system treats |
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211 | outstanding data at socket close time). |
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212 | |
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213 | This will not work for partial TLS data that could not yet been |
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214 | encoded. This data will be lost. |
169 | |
215 | |
170 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
216 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
171 | |
217 | |
172 | When this parameter is given, it enables TLS (SSL) mode, that means it |
218 | When this parameter is given, it enables TLS (SSL) mode, that means it |
173 | will start making tls handshake and will transparently encrypt/decrypt |
219 | will start making tls handshake and will transparently encrypt/decrypt |
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182 | You can also provide your own TLS connection object, but you have |
228 | You can also provide your own TLS connection object, but you have |
183 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
229 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
184 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
230 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
185 | AnyEvent::Handle. |
231 | AnyEvent::Handle. |
186 | |
232 | |
187 | See the C<starttls> method if you need to start TLs negotiation later. |
233 | See the C<starttls> method if you need to start TLS negotiation later. |
188 | |
234 | |
189 | =item tls_ctx => $ssl_ctx |
235 | =item tls_ctx => $ssl_ctx |
190 | |
236 | |
191 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
237 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
192 | (unless a connection object was specified directly). If this parameter is |
238 | (unless a connection object was specified directly). If this parameter is |
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227 | } |
273 | } |
228 | |
274 | |
229 | $self->{_activity} = AnyEvent->now; |
275 | $self->{_activity} = AnyEvent->now; |
230 | $self->_timeout; |
276 | $self->_timeout; |
231 | |
277 | |
232 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
278 | $self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain}; |
233 | $self->on_read (delete $self->{on_read} ) if $self->{on_read}; |
279 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
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280 | |
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281 | $self->start_read |
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282 | if $self->{on_read}; |
234 | |
283 | |
235 | $self |
284 | $self |
236 | } |
285 | } |
237 | |
286 | |
238 | sub _shutdown { |
287 | sub _shutdown { |
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297 | |
346 | |
298 | =cut |
347 | =cut |
299 | |
348 | |
300 | sub on_timeout { |
349 | sub on_timeout { |
301 | $_[0]{on_timeout} = $_[1]; |
350 | $_[0]{on_timeout} = $_[1]; |
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351 | } |
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352 | |
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353 | =item $handle->autocork ($boolean) |
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354 | |
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355 | Enables or disables the current autocork behaviour (see C<autocork> |
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356 | constructor argument). |
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357 | |
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358 | =cut |
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359 | |
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360 | =item $handle->no_delay ($boolean) |
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361 | |
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362 | Enables or disables the C<no_delay> setting (see constructor argument of |
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363 | the same name for details). |
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364 | |
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365 | =cut |
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366 | |
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367 | sub no_delay { |
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368 | $_[0]{no_delay} = $_[1]; |
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369 | |
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370 | eval { |
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371 | local $SIG{__DIE__}; |
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372 | setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]; |
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373 | }; |
302 | } |
374 | } |
303 | |
375 | |
304 | ############################################################################# |
376 | ############################################################################# |
305 | |
377 | |
306 | =item $handle->timeout ($seconds) |
378 | =item $handle->timeout ($seconds) |
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421 | $self->_error ($!, 1); |
493 | $self->_error ($!, 1); |
422 | } |
494 | } |
423 | }; |
495 | }; |
424 | |
496 | |
425 | # try to write data immediately |
497 | # try to write data immediately |
426 | $cb->(); |
498 | $cb->() unless $self->{autocork}; |
427 | |
499 | |
428 | # if still data left in wbuf, we need to poll |
500 | # if still data left in wbuf, we need to poll |
429 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
501 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
430 | if length $self->{wbuf}; |
502 | if length $self->{wbuf}; |
431 | }; |
503 | }; |
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476 | my ($self, $string) = @_; |
548 | my ($self, $string) = @_; |
477 | |
549 | |
478 | sprintf "%d:%s,", (length $string), $string |
550 | sprintf "%d:%s,", (length $string), $string |
479 | }; |
551 | }; |
480 | |
552 | |
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553 | =item packstring => $format, $data |
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554 | |
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555 | An octet string prefixed with an encoded length. The encoding C<$format> |
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556 | uses the same format as a Perl C<pack> format, but must specify a single |
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557 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
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558 | optional C<!>, C<< < >> or C<< > >> modifier). |
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559 | |
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560 | =cut |
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561 | |
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562 | register_write_type packstring => sub { |
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563 | my ($self, $format, $string) = @_; |
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564 | |
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565 | pack "$format/a*", $string |
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566 | }; |
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567 | |
481 | =item json => $array_or_hashref |
568 | =item json => $array_or_hashref |
482 | |
569 | |
483 | Encodes the given hash or array reference into a JSON object. Unless you |
570 | Encodes the given hash or array reference into a JSON object. Unless you |
484 | provide your own JSON object, this means it will be encoded to JSON text |
571 | provide your own JSON object, this means it will be encoded to JSON text |
485 | in UTF-8. |
572 | in UTF-8. |
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517 | |
604 | |
518 | $self->{json} ? $self->{json}->encode ($ref) |
605 | $self->{json} ? $self->{json}->encode ($ref) |
519 | : JSON::encode_json ($ref) |
606 | : JSON::encode_json ($ref) |
520 | }; |
607 | }; |
521 | |
608 | |
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609 | =item storable => $reference |
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610 | |
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611 | Freezes the given reference using L<Storable> and writes it to the |
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612 | handle. Uses the C<nfreeze> format. |
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613 | |
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614 | =cut |
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615 | |
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616 | register_write_type storable => sub { |
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617 | my ($self, $ref) = @_; |
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618 | |
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619 | require Storable; |
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620 | |
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621 | pack "w/a*", Storable::nfreeze ($ref) |
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622 | }; |
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623 | |
522 | =back |
624 | =back |
523 | |
625 | |
524 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
626 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
525 | |
627 | |
526 | This function (not method) lets you add your own types to C<push_write>. |
628 | This function (not method) lets you add your own types to C<push_write>. |
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548 | ways, the "simple" way, using only C<on_read> and the "complex" way, using |
650 | ways, the "simple" way, using only C<on_read> and the "complex" way, using |
549 | a queue. |
651 | a queue. |
550 | |
652 | |
551 | In the simple case, you just install an C<on_read> callback and whenever |
653 | In the simple case, you just install an C<on_read> callback and whenever |
552 | new data arrives, it will be called. You can then remove some data (if |
654 | new data arrives, it will be called. You can then remove some data (if |
553 | enough is there) from the read buffer (C<< $handle->rbuf >>) if you want |
655 | enough is there) from the read buffer (C<< $handle->rbuf >>). Or you cna |
554 | or not. |
656 | leave the data there if you want to accumulate more (e.g. when only a |
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657 | partial message has been received so far). |
555 | |
658 | |
556 | In the more complex case, you want to queue multiple callbacks. In this |
659 | In the more complex case, you want to queue multiple callbacks. In this |
557 | case, AnyEvent::Handle will call the first queued callback each time new |
660 | case, AnyEvent::Handle will call the first queued callback each time new |
558 | data arrives and removes it when it has done its job (see C<push_read>, |
661 | data arrives (also the first time it is queued) and removes it when it has |
559 | below). |
662 | done its job (see C<push_read>, below). |
560 | |
663 | |
561 | This way you can, for example, push three line-reads, followed by reading |
664 | This way you can, for example, push three line-reads, followed by reading |
562 | a chunk of data, and AnyEvent::Handle will execute them in order. |
665 | a chunk of data, and AnyEvent::Handle will execute them in order. |
563 | |
666 | |
564 | Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by |
667 | Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by |
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577 | # handle xml |
680 | # handle xml |
578 | }); |
681 | }); |
579 | }); |
682 | }); |
580 | }); |
683 | }); |
581 | |
684 | |
582 | Example 2: Implement a client for a protocol that replies either with |
685 | Example 2: Implement a client for a protocol that replies either with "OK" |
583 | "OK" and another line or "ERROR" for one request, and 64 bytes for the |
686 | and another line or "ERROR" for the first request that is sent, and 64 |
584 | second request. Due tot he availability of a full queue, we can just |
687 | bytes for the second request. Due to the availability of a queue, we can |
585 | pipeline sending both requests and manipulate the queue as necessary in |
688 | just pipeline sending both requests and manipulate the queue as necessary |
586 | the callbacks: |
689 | in the callbacks. |
587 | |
690 | |
588 | # request one |
691 | When the first callback is called and sees an "OK" response, it will |
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692 | C<unshift> another line-read. This line-read will be queued I<before> the |
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693 | 64-byte chunk callback. |
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694 | |
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695 | # request one, returns either "OK + extra line" or "ERROR" |
589 | $handle->push_write ("request 1\015\012"); |
696 | $handle->push_write ("request 1\015\012"); |
590 | |
697 | |
591 | # we expect "ERROR" or "OK" as response, so push a line read |
698 | # we expect "ERROR" or "OK" as response, so push a line read |
592 | $handle->push_read (line => sub { |
699 | $handle->push_read (line => sub { |
593 | # if we got an "OK", we have to _prepend_ another line, |
700 | # if we got an "OK", we have to _prepend_ another line, |
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600 | ... |
707 | ... |
601 | }); |
708 | }); |
602 | } |
709 | } |
603 | }); |
710 | }); |
604 | |
711 | |
605 | # request two |
712 | # request two, simply returns 64 octets |
606 | $handle->push_write ("request 2\015\012"); |
713 | $handle->push_write ("request 2\015\012"); |
607 | |
714 | |
608 | # simply read 64 bytes, always |
715 | # simply read 64 bytes, always |
609 | $handle->push_read (chunk => 64, sub { |
716 | $handle->push_read (chunk => 64, sub { |
610 | my $response = $_[1]; |
717 | my $response = $_[1]; |
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626 | ) { |
733 | ) { |
627 | return $self->_error (&Errno::ENOSPC, 1); |
734 | return $self->_error (&Errno::ENOSPC, 1); |
628 | } |
735 | } |
629 | |
736 | |
630 | while () { |
737 | while () { |
631 | no strict 'refs'; |
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632 | |
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633 | my $len = length $self->{rbuf}; |
738 | my $len = length $self->{rbuf}; |
634 | |
739 | |
635 | if (my $cb = shift @{ $self->{_queue} }) { |
740 | if (my $cb = shift @{ $self->{_queue} }) { |
636 | unless ($cb->($self)) { |
741 | unless ($cb->($self)) { |
637 | if ($self->{_eof}) { |
742 | if ($self->{_eof}) { |
638 | # no progress can be made (not enough data and no data forthcoming) |
743 | # no progress can be made (not enough data and no data forthcoming) |
639 | return $self->_error (&Errno::EPIPE, 1); |
744 | $self->_error (&Errno::EPIPE, 1), last; |
640 | } |
745 | } |
641 | |
746 | |
642 | unshift @{ $self->{_queue} }, $cb; |
747 | unshift @{ $self->{_queue} }, $cb; |
643 | last; |
748 | last; |
644 | } |
749 | } |
645 | } elsif ($self->{on_read}) { |
750 | } elsif ($self->{on_read}) { |
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751 | last unless $len; |
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752 | |
646 | $self->{on_read}($self); |
753 | $self->{on_read}($self); |
647 | |
754 | |
648 | if ( |
755 | if ( |
649 | $len == length $self->{rbuf} # if no data has been consumed |
756 | $len == length $self->{rbuf} # if no data has been consumed |
650 | && !@{ $self->{_queue} } # and the queue is still empty |
757 | && !@{ $self->{_queue} } # and the queue is still empty |
651 | && $self->{on_read} # but we still have on_read |
758 | && $self->{on_read} # but we still have on_read |
652 | ) { |
759 | ) { |
653 | # no further data will arrive |
760 | # no further data will arrive |
654 | # so no progress can be made |
761 | # so no progress can be made |
655 | return $self->_error (&Errno::EPIPE, 1) |
762 | $self->_error (&Errno::EPIPE, 1), last |
656 | if $self->{_eof}; |
763 | if $self->{_eof}; |
657 | |
764 | |
658 | last; # more data might arrive |
765 | last; # more data might arrive |
659 | } |
766 | } |
660 | } else { |
767 | } else { |
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662 | delete $self->{_rw}; |
769 | delete $self->{_rw}; |
663 | last; |
770 | last; |
664 | } |
771 | } |
665 | } |
772 | } |
666 | |
773 | |
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774 | if ($self->{_eof}) { |
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775 | if ($self->{on_eof}) { |
667 | $self->{on_eof}($self) |
776 | $self->{on_eof}($self) |
668 | if $self->{_eof} && $self->{on_eof}; |
777 | } else { |
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778 | $self->_error (0, 1); |
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779 | } |
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780 | } |
669 | |
781 | |
670 | # may need to restart read watcher |
782 | # may need to restart read watcher |
671 | unless ($self->{_rw}) { |
783 | unless ($self->{_rw}) { |
672 | $self->start_read |
784 | $self->start_read |
673 | if $self->{on_read} || @{ $self->{_queue} }; |
785 | if $self->{on_read} || @{ $self->{_queue} }; |
… | |
… | |
799 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
911 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
800 | 1 |
912 | 1 |
801 | } |
913 | } |
802 | }; |
914 | }; |
803 | |
915 | |
804 | # compatibility with older API |
|
|
805 | sub push_read_chunk { |
|
|
806 | $_[0]->push_read (chunk => $_[1], $_[2]); |
|
|
807 | } |
|
|
808 | |
|
|
809 | sub unshift_read_chunk { |
|
|
810 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
|
|
811 | } |
|
|
812 | |
|
|
813 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
916 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
814 | |
917 | |
815 | The callback will be called only once a full line (including the end of |
918 | The callback will be called only once a full line (including the end of |
816 | line marker, C<$eol>) has been read. This line (excluding the end of line |
919 | line marker, C<$eol>) has been read. This line (excluding the end of line |
817 | marker) will be passed to the callback as second argument (C<$line>), and |
920 | marker) will be passed to the callback as second argument (C<$line>), and |
… | |
… | |
832 | =cut |
935 | =cut |
833 | |
936 | |
834 | register_read_type line => sub { |
937 | register_read_type line => sub { |
835 | my ($self, $cb, $eol) = @_; |
938 | my ($self, $cb, $eol) = @_; |
836 | |
939 | |
837 | $eol = qr|(\015?\012)| if @_ < 3; |
940 | if (@_ < 3) { |
|
|
941 | # this is more than twice as fast as the generic code below |
|
|
942 | sub { |
|
|
943 | $_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return; |
|
|
944 | |
|
|
945 | $cb->($_[0], $1, $2); |
|
|
946 | 1 |
|
|
947 | } |
|
|
948 | } else { |
838 | $eol = quotemeta $eol unless ref $eol; |
949 | $eol = quotemeta $eol unless ref $eol; |
839 | $eol = qr|^(.*?)($eol)|s; |
950 | $eol = qr|^(.*?)($eol)|s; |
|
|
951 | |
|
|
952 | sub { |
|
|
953 | $_[0]{rbuf} =~ s/$eol// or return; |
|
|
954 | |
|
|
955 | $cb->($_[0], $1, $2); |
|
|
956 | 1 |
|
|
957 | } |
|
|
958 | } |
|
|
959 | }; |
|
|
960 | |
|
|
961 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
|
|
962 | |
|
|
963 | Makes a regex match against the regex object C<$accept> and returns |
|
|
964 | everything up to and including the match. |
|
|
965 | |
|
|
966 | Example: read a single line terminated by '\n'. |
|
|
967 | |
|
|
968 | $handle->push_read (regex => qr<\n>, sub { ... }); |
|
|
969 | |
|
|
970 | If C<$reject> is given and not undef, then it determines when the data is |
|
|
971 | to be rejected: it is matched against the data when the C<$accept> regex |
|
|
972 | does not match and generates an C<EBADMSG> error when it matches. This is |
|
|
973 | useful to quickly reject wrong data (to avoid waiting for a timeout or a |
|
|
974 | receive buffer overflow). |
|
|
975 | |
|
|
976 | Example: expect a single decimal number followed by whitespace, reject |
|
|
977 | anything else (not the use of an anchor). |
|
|
978 | |
|
|
979 | $handle->push_read (regex => qr<^[0-9]+\s>, qr<[^0-9]>, sub { ... }); |
|
|
980 | |
|
|
981 | If C<$skip> is given and not C<undef>, then it will be matched against |
|
|
982 | the receive buffer when neither C<$accept> nor C<$reject> match, |
|
|
983 | and everything preceding and including the match will be accepted |
|
|
984 | unconditionally. This is useful to skip large amounts of data that you |
|
|
985 | know cannot be matched, so that the C<$accept> or C<$reject> regex do not |
|
|
986 | have to start matching from the beginning. This is purely an optimisation |
|
|
987 | and is usually worth only when you expect more than a few kilobytes. |
|
|
988 | |
|
|
989 | Example: expect a http header, which ends at C<\015\012\015\012>. Since we |
|
|
990 | expect the header to be very large (it isn't in practise, but...), we use |
|
|
991 | a skip regex to skip initial portions. The skip regex is tricky in that |
|
|
992 | it only accepts something not ending in either \015 or \012, as these are |
|
|
993 | required for the accept regex. |
|
|
994 | |
|
|
995 | $handle->push_read (regex => |
|
|
996 | qr<\015\012\015\012>, |
|
|
997 | undef, # no reject |
|
|
998 | qr<^.*[^\015\012]>, |
|
|
999 | sub { ... }); |
|
|
1000 | |
|
|
1001 | =cut |
|
|
1002 | |
|
|
1003 | register_read_type regex => sub { |
|
|
1004 | my ($self, $cb, $accept, $reject, $skip) = @_; |
|
|
1005 | |
|
|
1006 | my $data; |
|
|
1007 | my $rbuf = \$self->{rbuf}; |
840 | |
1008 | |
841 | sub { |
1009 | sub { |
842 | $_[0]{rbuf} =~ s/$eol// or return; |
1010 | # accept |
843 | |
1011 | if ($$rbuf =~ $accept) { |
844 | $cb->($_[0], $1, $2); |
1012 | $data .= substr $$rbuf, 0, $+[0], ""; |
|
|
1013 | $cb->($self, $data); |
|
|
1014 | return 1; |
|
|
1015 | } |
845 | 1 |
1016 | |
|
|
1017 | # reject |
|
|
1018 | if ($reject && $$rbuf =~ $reject) { |
|
|
1019 | $self->_error (&Errno::EBADMSG); |
|
|
1020 | } |
|
|
1021 | |
|
|
1022 | # skip |
|
|
1023 | if ($skip && $$rbuf =~ $skip) { |
|
|
1024 | $data .= substr $$rbuf, 0, $+[0], ""; |
|
|
1025 | } |
|
|
1026 | |
|
|
1027 | () |
846 | } |
1028 | } |
847 | }; |
1029 | }; |
848 | |
|
|
849 | # compatibility with older API |
|
|
850 | sub push_read_line { |
|
|
851 | my $self = shift; |
|
|
852 | $self->push_read (line => @_); |
|
|
853 | } |
|
|
854 | |
|
|
855 | sub unshift_read_line { |
|
|
856 | my $self = shift; |
|
|
857 | $self->unshift_read (line => @_); |
|
|
858 | } |
|
|
859 | |
1030 | |
860 | =item netstring => $cb->($handle, $string) |
1031 | =item netstring => $cb->($handle, $string) |
861 | |
1032 | |
862 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
1033 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
863 | |
1034 | |
… | |
… | |
891 | |
1062 | |
892 | 1 |
1063 | 1 |
893 | } |
1064 | } |
894 | }; |
1065 | }; |
895 | |
1066 | |
896 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
1067 | =item packstring => $format, $cb->($handle, $string) |
897 | |
1068 | |
898 | Makes a regex match against the regex object C<$accept> and returns |
1069 | An octet string prefixed with an encoded length. The encoding C<$format> |
899 | everything up to and including the match. |
1070 | uses the same format as a Perl C<pack> format, but must specify a single |
|
|
1071 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
|
|
1072 | optional C<!>, C<< < >> or C<< > >> modifier). |
900 | |
1073 | |
901 | Example: read a single line terminated by '\n'. |
1074 | DNS over TCP uses a prefix of C<n>, EPP uses a prefix of C<N>. |
902 | |
1075 | |
903 | $handle->push_read (regex => qr<\n>, sub { ... }); |
1076 | Example: read a block of data prefixed by its length in BER-encoded |
|
|
1077 | format (very efficient). |
904 | |
1078 | |
905 | If C<$reject> is given and not undef, then it determines when the data is |
1079 | $handle->push_read (packstring => "w", sub { |
906 | to be rejected: it is matched against the data when the C<$accept> regex |
1080 | my ($handle, $data) = @_; |
907 | does not match and generates an C<EBADMSG> error when it matches. This is |
1081 | }); |
908 | useful to quickly reject wrong data (to avoid waiting for a timeout or a |
|
|
909 | receive buffer overflow). |
|
|
910 | |
1082 | |
911 | Example: expect a single decimal number followed by whitespace, reject |
|
|
912 | anything else (not the use of an anchor). |
|
|
913 | |
|
|
914 | $handle->push_read (regex => qr<^[0-9]+\s>, qr<[^0-9]>, sub { ... }); |
|
|
915 | |
|
|
916 | If C<$skip> is given and not C<undef>, then it will be matched against |
|
|
917 | the receive buffer when neither C<$accept> nor C<$reject> match, |
|
|
918 | and everything preceding and including the match will be accepted |
|
|
919 | unconditionally. This is useful to skip large amounts of data that you |
|
|
920 | know cannot be matched, so that the C<$accept> or C<$reject> regex do not |
|
|
921 | have to start matching from the beginning. This is purely an optimisation |
|
|
922 | and is usually worth only when you expect more than a few kilobytes. |
|
|
923 | |
|
|
924 | Example: expect a http header, which ends at C<\015\012\015\012>. Since we |
|
|
925 | expect the header to be very large (it isn't in practise, but...), we use |
|
|
926 | a skip regex to skip initial portions. The skip regex is tricky in that |
|
|
927 | it only accepts something not ending in either \015 or \012, as these are |
|
|
928 | required for the accept regex. |
|
|
929 | |
|
|
930 | $handle->push_read (regex => |
|
|
931 | qr<\015\012\015\012>, |
|
|
932 | undef, # no reject |
|
|
933 | qr<^.*[^\015\012]>, |
|
|
934 | sub { ... }); |
|
|
935 | |
|
|
936 | =cut |
1083 | =cut |
937 | |
1084 | |
938 | register_read_type regex => sub { |
1085 | register_read_type packstring => sub { |
939 | my ($self, $cb, $accept, $reject, $skip) = @_; |
1086 | my ($self, $cb, $format) = @_; |
940 | |
|
|
941 | my $data; |
|
|
942 | my $rbuf = \$self->{rbuf}; |
|
|
943 | |
1087 | |
944 | sub { |
1088 | sub { |
945 | # accept |
1089 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
946 | if ($$rbuf =~ $accept) { |
1090 | defined (my $len = eval { unpack $format, $_[0]{rbuf} }) |
947 | $data .= substr $$rbuf, 0, $+[0], ""; |
|
|
948 | $cb->($self, $data); |
|
|
949 | return 1; |
1091 | or return; |
950 | } |
1092 | |
|
|
1093 | $format = length pack $format, $len; |
|
|
1094 | |
|
|
1095 | # bypass unshift if we already have the remaining chunk |
|
|
1096 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1097 | my $data = substr $_[0]{rbuf}, $format, $len; |
|
|
1098 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1099 | $cb->($_[0], $data); |
|
|
1100 | } else { |
|
|
1101 | # remove prefix |
|
|
1102 | substr $_[0]{rbuf}, 0, $format, ""; |
|
|
1103 | |
|
|
1104 | # read remaining chunk |
|
|
1105 | $_[0]->unshift_read (chunk => $len, $cb); |
951 | |
1106 | } |
952 | # reject |
1107 | |
953 | if ($reject && $$rbuf =~ $reject) { |
|
|
954 | $self->_error (&Errno::EBADMSG); |
|
|
955 | } |
1108 | 1 |
956 | |
|
|
957 | # skip |
|
|
958 | if ($skip && $$rbuf =~ $skip) { |
|
|
959 | $data .= substr $$rbuf, 0, $+[0], ""; |
|
|
960 | } |
|
|
961 | |
|
|
962 | () |
|
|
963 | } |
1109 | } |
964 | }; |
1110 | }; |
965 | |
1111 | |
966 | =item json => $cb->($handle, $hash_or_arrayref) |
1112 | =item json => $cb->($handle, $hash_or_arrayref) |
967 | |
1113 | |
… | |
… | |
980 | the C<json> write type description, above, for an actual example. |
1126 | the C<json> write type description, above, for an actual example. |
981 | |
1127 | |
982 | =cut |
1128 | =cut |
983 | |
1129 | |
984 | register_read_type json => sub { |
1130 | register_read_type json => sub { |
985 | my ($self, $cb, $accept, $reject, $skip) = @_; |
1131 | my ($self, $cb) = @_; |
986 | |
1132 | |
987 | require JSON; |
1133 | require JSON; |
988 | |
1134 | |
989 | my $data; |
1135 | my $data; |
990 | my $rbuf = \$self->{rbuf}; |
1136 | my $rbuf = \$self->{rbuf}; |
… | |
… | |
1002 | 1 |
1148 | 1 |
1003 | } else { |
1149 | } else { |
1004 | $self->{rbuf} = ""; |
1150 | $self->{rbuf} = ""; |
1005 | () |
1151 | () |
1006 | } |
1152 | } |
|
|
1153 | } |
|
|
1154 | }; |
|
|
1155 | |
|
|
1156 | =item storable => $cb->($handle, $ref) |
|
|
1157 | |
|
|
1158 | Deserialises a L<Storable> frozen representation as written by the |
|
|
1159 | C<storable> write type (BER-encoded length prefix followed by nfreeze'd |
|
|
1160 | data). |
|
|
1161 | |
|
|
1162 | Raises C<EBADMSG> error if the data could not be decoded. |
|
|
1163 | |
|
|
1164 | =cut |
|
|
1165 | |
|
|
1166 | register_read_type storable => sub { |
|
|
1167 | my ($self, $cb) = @_; |
|
|
1168 | |
|
|
1169 | require Storable; |
|
|
1170 | |
|
|
1171 | sub { |
|
|
1172 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
|
|
1173 | defined (my $len = eval { unpack "w", $_[0]{rbuf} }) |
|
|
1174 | or return; |
|
|
1175 | |
|
|
1176 | my $format = length pack "w", $len; |
|
|
1177 | |
|
|
1178 | # bypass unshift if we already have the remaining chunk |
|
|
1179 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1180 | my $data = substr $_[0]{rbuf}, $format, $len; |
|
|
1181 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1182 | $cb->($_[0], Storable::thaw ($data)); |
|
|
1183 | } else { |
|
|
1184 | # remove prefix |
|
|
1185 | substr $_[0]{rbuf}, 0, $format, ""; |
|
|
1186 | |
|
|
1187 | # read remaining chunk |
|
|
1188 | $_[0]->unshift_read (chunk => $len, sub { |
|
|
1189 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
|
|
1190 | $cb->($_[0], $ref); |
|
|
1191 | } else { |
|
|
1192 | $self->_error (&Errno::EBADMSG); |
|
|
1193 | } |
|
|
1194 | }); |
|
|
1195 | } |
|
|
1196 | |
|
|
1197 | 1 |
1007 | } |
1198 | } |
1008 | }; |
1199 | }; |
1009 | |
1200 | |
1010 | =back |
1201 | =back |
1011 | |
1202 | |
… | |
… | |
1199 | |
1390 | |
1200 | sub DESTROY { |
1391 | sub DESTROY { |
1201 | my $self = shift; |
1392 | my $self = shift; |
1202 | |
1393 | |
1203 | $self->stoptls; |
1394 | $self->stoptls; |
|
|
1395 | |
|
|
1396 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
|
|
1397 | |
|
|
1398 | if ($linger && length $self->{wbuf}) { |
|
|
1399 | my $fh = delete $self->{fh}; |
|
|
1400 | my $wbuf = delete $self->{wbuf}; |
|
|
1401 | |
|
|
1402 | my @linger; |
|
|
1403 | |
|
|
1404 | push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub { |
|
|
1405 | my $len = syswrite $fh, $wbuf, length $wbuf; |
|
|
1406 | |
|
|
1407 | if ($len > 0) { |
|
|
1408 | substr $wbuf, 0, $len, ""; |
|
|
1409 | } else { |
|
|
1410 | @linger = (); # end |
|
|
1411 | } |
|
|
1412 | }); |
|
|
1413 | push @linger, AnyEvent->timer (after => $linger, cb => sub { |
|
|
1414 | @linger = (); |
|
|
1415 | }); |
|
|
1416 | } |
1204 | } |
1417 | } |
1205 | |
1418 | |
1206 | =item AnyEvent::Handle::TLS_CTX |
1419 | =item AnyEvent::Handle::TLS_CTX |
1207 | |
1420 | |
1208 | This function creates and returns the Net::SSLeay::CTX object used by |
1421 | This function creates and returns the Net::SSLeay::CTX object used by |
… | |
… | |
1250 | =over 4 |
1463 | =over 4 |
1251 | |
1464 | |
1252 | =item * all constructor arguments become object members. |
1465 | =item * all constructor arguments become object members. |
1253 | |
1466 | |
1254 | At least initially, when you pass a C<tls>-argument to the constructor it |
1467 | At least initially, when you pass a C<tls>-argument to the constructor it |
1255 | will end up in C<< $handle->{tls} >>. Those members might be changes or |
1468 | will end up in C<< $handle->{tls} >>. Those members might be changed or |
1256 | mutated later on (for example C<tls> will hold the TLS connection object). |
1469 | mutated later on (for example C<tls> will hold the TLS connection object). |
1257 | |
1470 | |
1258 | =item * other object member names are prefixed with an C<_>. |
1471 | =item * other object member names are prefixed with an C<_>. |
1259 | |
1472 | |
1260 | All object members not explicitly documented (internal use) are prefixed |
1473 | All object members not explicitly documented (internal use) are prefixed |