… | |
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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 = 4.1; |
19 | our $VERSION = 4.151; |
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 on EOF. |
80 | Set the callback to be called when an end-of-file condition is detcted, |
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81 | i.e. in the case of a socket, when the other side has closed the |
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82 | connection cleanly. |
81 | |
83 | |
82 | While not mandatory, it is highly recommended to set an eof callback, |
84 | While not mandatory, it is highly recommended to set an eof callback, |
83 | otherwise you might end up with a closed socket while you are still |
85 | otherwise you might end up with a closed socket while you are still |
84 | waiting for data. |
86 | waiting for data. |
85 | |
87 | |
86 | =item on_error => $cb->($handle) |
88 | =item on_error => $cb->($handle, $fatal) |
87 | |
89 | |
88 | This is the fatal error callback, that is called when, well, a fatal error |
90 | This is the error callback, which is called when, well, some error |
89 | occurs, such as not being able to resolve the hostname, failure to connect |
91 | occured, such as not being able to resolve the hostname, failure to |
90 | or a read error. |
92 | connect or a read error. |
91 | |
93 | |
92 | The object will not be in a usable state when this callback has been |
94 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
93 | called. |
95 | fatal errors the handle object will be shut down and will not be |
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96 | usable. Non-fatal errors can be retried by simply returning, but it is |
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97 | recommended to simply ignore this parameter and instead abondon the handle |
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98 | object when this callback is invoked. |
94 | |
99 | |
95 | On callback entrance, the value of C<$!> contains the operating system |
100 | On callback entrance, the value of C<$!> contains the operating system |
96 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
101 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
97 | |
102 | |
98 | The callback should throw an exception. If it returns, then |
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99 | AnyEvent::Handle will C<croak> for you. |
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100 | |
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101 | While not mandatory, it is I<highly> recommended to set this callback, as |
103 | While not mandatory, it is I<highly> recommended to set this callback, as |
102 | you will not be notified of errors otherwise. The default simply calls |
104 | you will not be notified of errors otherwise. The default simply calls |
103 | die. |
105 | C<croak>. |
104 | |
106 | |
105 | =item on_read => $cb->($handle) |
107 | =item on_read => $cb->($handle) |
106 | |
108 | |
107 | This sets the default read callback, which is called when data arrives |
109 | This sets the default read callback, which is called when data arrives |
108 | and no read request is in the queue. |
110 | and no read request is in the queue (unlike read queue callbacks, this |
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111 | callback will only be called when at least one octet of data is in the |
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112 | read buffer). |
109 | |
113 | |
110 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
114 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
111 | method or access the C<$handle->{rbuf}> member directly. |
115 | method or access the C<$handle->{rbuf}> member directly. |
112 | |
116 | |
113 | When an EOF condition is detected then AnyEvent::Handle will first try to |
117 | When an EOF condition is detected then AnyEvent::Handle will first try to |
… | |
… | |
119 | |
123 | |
120 | This sets the callback that is called when the write buffer becomes empty |
124 | This sets the callback that is called when the write buffer becomes empty |
121 | (or when the callback is set and the buffer is empty already). |
125 | (or when the callback is set and the buffer is empty already). |
122 | |
126 | |
123 | To append to the write buffer, use the C<< ->push_write >> method. |
127 | To append to the write buffer, use the C<< ->push_write >> method. |
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128 | |
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129 | This callback is useful when you don't want to put all of your write data |
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130 | into the queue at once, for example, when you want to write the contents |
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131 | of some file to the socket you might not want to read the whole file into |
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132 | memory and push it into the queue, but instead only read more data from |
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133 | the file when the write queue becomes empty. |
124 | |
134 | |
125 | =item timeout => $fractional_seconds |
135 | =item timeout => $fractional_seconds |
126 | |
136 | |
127 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
137 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
128 | seconds pass without a successful read or write on the underlying file |
138 | seconds pass without a successful read or write on the underlying file |
… | |
… | |
152 | be configured to accept only so-and-so much data that it cannot act on |
162 | be configured to accept only so-and-so much data that it cannot act on |
153 | (for example, when expecting a line, an attacker could send an unlimited |
163 | (for example, when expecting a line, an attacker could send an unlimited |
154 | amount of data without a callback ever being called as long as the line |
164 | amount of data without a callback ever being called as long as the line |
155 | isn't finished). |
165 | isn't finished). |
156 | |
166 | |
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167 | =item autocork => <boolean> |
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168 | |
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169 | When disabled (the default), then C<push_write> will try to immediately |
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170 | write the data to the handle if possible. This avoids having to register |
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171 | a write watcher and wait for the next event loop iteration, but can be |
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172 | inefficient if you write multiple small chunks (this disadvantage is |
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173 | usually avoided by your kernel's nagle algorithm, see C<low_delay>). |
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174 | |
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175 | When enabled, then writes will always be queued till the next event loop |
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176 | iteration. This is efficient when you do many small writes per iteration, |
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177 | but less efficient when you do a single write only. |
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178 | |
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179 | =item no_delay => <boolean> |
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180 | |
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181 | When doing small writes on sockets, your operating system kernel might |
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182 | wait a bit for more data before actually sending it out. This is called |
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183 | the Nagle algorithm, and usually it is beneficial. |
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184 | |
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185 | In some situations you want as low a delay as possible, which cna be |
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186 | accomplishd by setting this option to true. |
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187 | |
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188 | The default is your opertaing system's default behaviour, this option |
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189 | explicitly enables or disables it, if possible. |
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190 | |
157 | =item read_size => <bytes> |
191 | =item read_size => <bytes> |
158 | |
192 | |
159 | The default read block size (the amount of bytes this module will try to read |
193 | The default read block size (the amount of bytes this module will try to read |
160 | during each (loop iteration). Default: C<8192>. |
194 | during each (loop iteration). Default: C<8192>. |
161 | |
195 | |
162 | =item low_water_mark => <bytes> |
196 | =item low_water_mark => <bytes> |
163 | |
197 | |
164 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
198 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
165 | buffer: If the write reaches this size or gets even samller it is |
199 | buffer: If the write reaches this size or gets even samller it is |
166 | considered empty. |
200 | considered empty. |
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201 | |
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202 | =item linger => <seconds> |
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203 | |
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204 | If non-zero (default: C<3600>), then the destructor of the |
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205 | AnyEvent::Handle object will check wether there is still outstanding write |
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206 | data and will install a watcher that will write out this data. No errors |
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207 | will be reported (this mostly matches how the operating system treats |
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208 | outstanding data at socket close time). |
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209 | |
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210 | This will not work for partial TLS data that could not yet been |
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211 | encoded. This data will be lost. |
167 | |
212 | |
168 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
213 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
169 | |
214 | |
170 | When this parameter is given, it enables TLS (SSL) mode, that means it |
215 | When this parameter is given, it enables TLS (SSL) mode, that means it |
171 | will start making tls handshake and will transparently encrypt/decrypt |
216 | will start making tls handshake and will transparently encrypt/decrypt |
… | |
… | |
222 | if ($self->{tls}) { |
267 | if ($self->{tls}) { |
223 | require Net::SSLeay; |
268 | require Net::SSLeay; |
224 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
269 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
225 | } |
270 | } |
226 | |
271 | |
227 | # $self->on_eof (delete $self->{on_eof} ) if $self->{on_eof}; # nop |
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228 | # $self->on_error (delete $self->{on_error}) if $self->{on_error}; # nop |
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229 | # $self->on_read (delete $self->{on_read} ) if $self->{on_read}; # nop |
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230 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
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231 | |
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232 | $self->{_activity} = AnyEvent->now; |
272 | $self->{_activity} = AnyEvent->now; |
233 | $self->_timeout; |
273 | $self->_timeout; |
234 | |
274 | |
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275 | $self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain}; |
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276 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
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277 | |
235 | $self->start_read; |
278 | $self->start_read |
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279 | if $self->{on_read}; |
236 | |
280 | |
237 | $self |
281 | $self |
238 | } |
282 | } |
239 | |
283 | |
240 | sub _shutdown { |
284 | sub _shutdown { |
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242 | |
286 | |
243 | delete $self->{_tw}; |
287 | delete $self->{_tw}; |
244 | delete $self->{_rw}; |
288 | delete $self->{_rw}; |
245 | delete $self->{_ww}; |
289 | delete $self->{_ww}; |
246 | delete $self->{fh}; |
290 | delete $self->{fh}; |
247 | } |
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248 | |
291 | |
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292 | $self->stoptls; |
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293 | } |
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294 | |
249 | sub error { |
295 | sub _error { |
250 | my ($self) = @_; |
296 | my ($self, $errno, $fatal) = @_; |
251 | |
297 | |
252 | { |
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253 | local $!; |
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254 | $self->_shutdown; |
298 | $self->_shutdown |
255 | } |
299 | if $fatal; |
256 | |
300 | |
257 | $self->{on_error}($self) |
301 | $! = $errno; |
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302 | |
258 | if $self->{on_error}; |
303 | if ($self->{on_error}) { |
259 | |
304 | $self->{on_error}($self, $fatal); |
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305 | } else { |
260 | Carp::croak "AnyEvent::Handle uncaught fatal error: $!"; |
306 | Carp::croak "AnyEvent::Handle uncaught error: $!"; |
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307 | } |
261 | } |
308 | } |
262 | |
309 | |
263 | =item $fh = $handle->fh |
310 | =item $fh = $handle->fh |
264 | |
311 | |
265 | This method returns the file handle of the L<AnyEvent::Handle> object. |
312 | This method returns the file handle of the L<AnyEvent::Handle> object. |
… | |
… | |
296 | |
343 | |
297 | =cut |
344 | =cut |
298 | |
345 | |
299 | sub on_timeout { |
346 | sub on_timeout { |
300 | $_[0]{on_timeout} = $_[1]; |
347 | $_[0]{on_timeout} = $_[1]; |
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348 | } |
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349 | |
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350 | =item $handle->autocork ($boolean) |
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351 | |
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352 | Enables or disables the current autocork behaviour (see C<autocork> |
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353 | constructor argument). |
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354 | |
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355 | =cut |
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356 | |
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357 | =item $handle->no_delay ($boolean) |
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358 | |
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359 | Enables or disables the C<no_delay> setting (see constructor argument of |
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360 | the same name for details). |
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361 | |
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362 | =cut |
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363 | |
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364 | sub no_delay { |
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365 | $_[0]{no_delay} = $_[1]; |
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366 | |
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367 | eval { |
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368 | local $SIG{__DIE__}; |
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369 | setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]; |
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370 | }; |
301 | } |
371 | } |
302 | |
372 | |
303 | ############################################################################# |
373 | ############################################################################# |
304 | |
374 | |
305 | =item $handle->timeout ($seconds) |
375 | =item $handle->timeout ($seconds) |
… | |
… | |
331 | $self->{_activity} = $NOW; |
401 | $self->{_activity} = $NOW; |
332 | |
402 | |
333 | if ($self->{on_timeout}) { |
403 | if ($self->{on_timeout}) { |
334 | $self->{on_timeout}($self); |
404 | $self->{on_timeout}($self); |
335 | } else { |
405 | } else { |
336 | $! = Errno::ETIMEDOUT; |
406 | $self->_error (&Errno::ETIMEDOUT); |
337 | $self->error; |
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338 | } |
407 | } |
339 | |
408 | |
340 | # callbakx could have changed timeout value, optimise |
409 | # callback could have changed timeout value, optimise |
341 | return unless $self->{timeout}; |
410 | return unless $self->{timeout}; |
342 | |
411 | |
343 | # calculate new after |
412 | # calculate new after |
344 | $after = $self->{timeout}; |
413 | $after = $self->{timeout}; |
345 | } |
414 | } |
346 | |
415 | |
347 | Scalar::Util::weaken $self; |
416 | Scalar::Util::weaken $self; |
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417 | return unless $self; # ->error could have destroyed $self |
348 | |
418 | |
349 | $self->{_tw} ||= AnyEvent->timer (after => $after, cb => sub { |
419 | $self->{_tw} ||= AnyEvent->timer (after => $after, cb => sub { |
350 | delete $self->{_tw}; |
420 | delete $self->{_tw}; |
351 | $self->_timeout; |
421 | $self->_timeout; |
352 | }); |
422 | }); |
… | |
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415 | if $self->{low_water_mark} >= length $self->{wbuf} |
485 | if $self->{low_water_mark} >= length $self->{wbuf} |
416 | && $self->{on_drain}; |
486 | && $self->{on_drain}; |
417 | |
487 | |
418 | delete $self->{_ww} unless length $self->{wbuf}; |
488 | delete $self->{_ww} unless length $self->{wbuf}; |
419 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
489 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
420 | $self->error; |
490 | $self->_error ($!, 1); |
421 | } |
491 | } |
422 | }; |
492 | }; |
423 | |
493 | |
424 | # try to write data immediately |
494 | # try to write data immediately |
425 | $cb->(); |
495 | $cb->() unless $self->{autocork}; |
426 | |
496 | |
427 | # if still data left in wbuf, we need to poll |
497 | # if still data left in wbuf, we need to poll |
428 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
498 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
429 | if length $self->{wbuf}; |
499 | if length $self->{wbuf}; |
430 | }; |
500 | }; |
… | |
… | |
454 | } |
524 | } |
455 | } |
525 | } |
456 | |
526 | |
457 | =item $handle->push_write (type => @args) |
527 | =item $handle->push_write (type => @args) |
458 | |
528 | |
459 | =item $handle->unshift_write (type => @args) |
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460 | |
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461 | Instead of formatting your data yourself, you can also let this module do |
529 | Instead of formatting your data yourself, you can also let this module do |
462 | the job by specifying a type and type-specific arguments. |
530 | the job by specifying a type and type-specific arguments. |
463 | |
531 | |
464 | Predefined types are (if you have ideas for additional types, feel free to |
532 | Predefined types are (if you have ideas for additional types, feel free to |
465 | drop by and tell us): |
533 | drop by and tell us): |
… | |
… | |
469 | =item netstring => $string |
537 | =item netstring => $string |
470 | |
538 | |
471 | Formats the given value as netstring |
539 | Formats the given value as netstring |
472 | (http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them). |
540 | (http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them). |
473 | |
541 | |
474 | =back |
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475 | |
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476 | =cut |
542 | =cut |
477 | |
543 | |
478 | register_write_type netstring => sub { |
544 | register_write_type netstring => sub { |
479 | my ($self, $string) = @_; |
545 | my ($self, $string) = @_; |
480 | |
546 | |
481 | sprintf "%d:%s,", (length $string), $string |
547 | sprintf "%d:%s,", (length $string), $string |
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548 | }; |
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549 | |
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550 | =item packstring => $format, $data |
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551 | |
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552 | An octet string prefixed with an encoded length. The encoding C<$format> |
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553 | uses the same format as a Perl C<pack> format, but must specify a single |
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554 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
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555 | optional C<!>, C<< < >> or C<< > >> modifier). |
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556 | |
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557 | =cut |
|
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558 | |
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559 | register_write_type packstring => sub { |
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560 | my ($self, $format, $string) = @_; |
|
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561 | |
|
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562 | pack "$format/a*", $string |
482 | }; |
563 | }; |
483 | |
564 | |
484 | =item json => $array_or_hashref |
565 | =item json => $array_or_hashref |
485 | |
566 | |
486 | Encodes the given hash or array reference into a JSON object. Unless you |
567 | Encodes the given hash or array reference into a JSON object. Unless you |
… | |
… | |
520 | |
601 | |
521 | $self->{json} ? $self->{json}->encode ($ref) |
602 | $self->{json} ? $self->{json}->encode ($ref) |
522 | : JSON::encode_json ($ref) |
603 | : JSON::encode_json ($ref) |
523 | }; |
604 | }; |
524 | |
605 | |
|
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606 | =item storable => $reference |
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607 | |
|
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608 | Freezes the given reference using L<Storable> and writes it to the |
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609 | handle. Uses the C<nfreeze> format. |
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610 | |
|
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611 | =cut |
|
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612 | |
|
|
613 | register_write_type storable => sub { |
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614 | my ($self, $ref) = @_; |
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615 | |
|
|
616 | require Storable; |
|
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617 | |
|
|
618 | pack "w/a*", Storable::nfreeze ($ref) |
|
|
619 | }; |
|
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620 | |
|
|
621 | =back |
|
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622 | |
525 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
623 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
526 | |
624 | |
527 | This function (not method) lets you add your own types to C<push_write>. |
625 | This function (not method) lets you add your own types to C<push_write>. |
528 | Whenever the given C<type> is used, C<push_write> will invoke the code |
626 | Whenever the given C<type> is used, C<push_write> will invoke the code |
529 | reference with the handle object and the remaining arguments. |
627 | reference with the handle object and the remaining arguments. |
… | |
… | |
549 | ways, the "simple" way, using only C<on_read> and the "complex" way, using |
647 | ways, the "simple" way, using only C<on_read> and the "complex" way, using |
550 | a queue. |
648 | a queue. |
551 | |
649 | |
552 | In the simple case, you just install an C<on_read> callback and whenever |
650 | In the simple case, you just install an C<on_read> callback and whenever |
553 | new data arrives, it will be called. You can then remove some data (if |
651 | new data arrives, it will be called. You can then remove some data (if |
554 | enough is there) from the read buffer (C<< $handle->rbuf >>) if you want |
652 | enough is there) from the read buffer (C<< $handle->rbuf >>). Or you cna |
555 | or not. |
653 | leave the data there if you want to accumulate more (e.g. when only a |
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654 | partial message has been received so far). |
556 | |
655 | |
557 | In the more complex case, you want to queue multiple callbacks. In this |
656 | In the more complex case, you want to queue multiple callbacks. In this |
558 | case, AnyEvent::Handle will call the first queued callback each time new |
657 | case, AnyEvent::Handle will call the first queued callback each time new |
559 | data arrives and removes it when it has done its job (see C<push_read>, |
658 | data arrives (also the first time it is queued) and removes it when it has |
560 | below). |
659 | done its job (see C<push_read>, below). |
561 | |
660 | |
562 | This way you can, for example, push three line-reads, followed by reading |
661 | This way you can, for example, push three line-reads, followed by reading |
563 | a chunk of data, and AnyEvent::Handle will execute them in order. |
662 | a chunk of data, and AnyEvent::Handle will execute them in order. |
564 | |
663 | |
565 | Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by |
664 | Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by |
566 | the specified number of bytes which give an XML datagram. |
665 | the specified number of bytes which give an XML datagram. |
567 | |
666 | |
568 | # in the default state, expect some header bytes |
667 | # in the default state, expect some header bytes |
569 | $handle->on_read (sub { |
668 | $handle->on_read (sub { |
570 | # some data is here, now queue the length-header-read (4 octets) |
669 | # some data is here, now queue the length-header-read (4 octets) |
571 | shift->unshift_read_chunk (4, sub { |
670 | shift->unshift_read (chunk => 4, sub { |
572 | # header arrived, decode |
671 | # header arrived, decode |
573 | my $len = unpack "N", $_[1]; |
672 | my $len = unpack "N", $_[1]; |
574 | |
673 | |
575 | # now read the payload |
674 | # now read the payload |
576 | shift->unshift_read_chunk ($len, sub { |
675 | shift->unshift_read (chunk => $len, sub { |
577 | my $xml = $_[1]; |
676 | my $xml = $_[1]; |
578 | # handle xml |
677 | # handle xml |
579 | }); |
678 | }); |
580 | }); |
679 | }); |
581 | }); |
680 | }); |
582 | |
681 | |
583 | Example 2: Implement a client for a protocol that replies either with |
682 | Example 2: Implement a client for a protocol that replies either with "OK" |
584 | "OK" and another line or "ERROR" for one request, and 64 bytes for the |
683 | and another line or "ERROR" for the first request that is sent, and 64 |
585 | second request. Due tot he availability of a full queue, we can just |
684 | bytes for the second request. Due to the availability of a queue, we can |
586 | pipeline sending both requests and manipulate the queue as necessary in |
685 | just pipeline sending both requests and manipulate the queue as necessary |
587 | the callbacks: |
686 | in the callbacks. |
588 | |
687 | |
589 | # request one |
688 | When the first callback is called and sees an "OK" response, it will |
|
|
689 | C<unshift> another line-read. This line-read will be queued I<before> the |
|
|
690 | 64-byte chunk callback. |
|
|
691 | |
|
|
692 | # request one, returns either "OK + extra line" or "ERROR" |
590 | $handle->push_write ("request 1\015\012"); |
693 | $handle->push_write ("request 1\015\012"); |
591 | |
694 | |
592 | # we expect "ERROR" or "OK" as response, so push a line read |
695 | # we expect "ERROR" or "OK" as response, so push a line read |
593 | $handle->push_read_line (sub { |
696 | $handle->push_read (line => sub { |
594 | # if we got an "OK", we have to _prepend_ another line, |
697 | # if we got an "OK", we have to _prepend_ another line, |
595 | # so it will be read before the second request reads its 64 bytes |
698 | # so it will be read before the second request reads its 64 bytes |
596 | # which are already in the queue when this callback is called |
699 | # which are already in the queue when this callback is called |
597 | # we don't do this in case we got an error |
700 | # we don't do this in case we got an error |
598 | if ($_[1] eq "OK") { |
701 | if ($_[1] eq "OK") { |
599 | $_[0]->unshift_read_line (sub { |
702 | $_[0]->unshift_read (line => sub { |
600 | my $response = $_[1]; |
703 | my $response = $_[1]; |
601 | ... |
704 | ... |
602 | }); |
705 | }); |
603 | } |
706 | } |
604 | }); |
707 | }); |
605 | |
708 | |
606 | # request two |
709 | # request two, simply returns 64 octets |
607 | $handle->push_write ("request 2\015\012"); |
710 | $handle->push_write ("request 2\015\012"); |
608 | |
711 | |
609 | # simply read 64 bytes, always |
712 | # simply read 64 bytes, always |
610 | $handle->push_read_chunk (64, sub { |
713 | $handle->push_read (chunk => 64, sub { |
611 | my $response = $_[1]; |
714 | my $response = $_[1]; |
612 | ... |
715 | ... |
613 | }); |
716 | }); |
614 | |
717 | |
615 | =over 4 |
718 | =over 4 |
616 | |
719 | |
617 | =cut |
720 | =cut |
618 | |
721 | |
619 | sub _drain_rbuf { |
722 | sub _drain_rbuf { |
620 | my ($self) = @_; |
723 | my ($self) = @_; |
|
|
724 | |
|
|
725 | local $self->{_in_drain} = 1; |
621 | |
726 | |
622 | if ( |
727 | if ( |
623 | defined $self->{rbuf_max} |
728 | defined $self->{rbuf_max} |
624 | && $self->{rbuf_max} < length $self->{rbuf} |
729 | && $self->{rbuf_max} < length $self->{rbuf} |
625 | ) { |
730 | ) { |
626 | $! = &Errno::ENOSPC; |
731 | return $self->_error (&Errno::ENOSPC, 1); |
627 | $self->error; |
|
|
628 | } |
732 | } |
629 | |
733 | |
630 | return if $self->{in_drain}; |
734 | while () { |
631 | local $self->{in_drain} = 1; |
|
|
632 | |
|
|
633 | while (my $len = length $self->{rbuf}) { |
|
|
634 | no strict 'refs'; |
735 | no strict 'refs'; |
|
|
736 | |
|
|
737 | my $len = length $self->{rbuf}; |
|
|
738 | |
635 | if (my $cb = shift @{ $self->{_queue} }) { |
739 | if (my $cb = shift @{ $self->{_queue} }) { |
636 | unless ($cb->($self)) { |
740 | unless ($cb->($self)) { |
637 | if ($self->{_eof}) { |
741 | if ($self->{_eof}) { |
638 | # no progress can be made (not enough data and no data forthcoming) |
742 | # no progress can be made (not enough data and no data forthcoming) |
639 | $! = &Errno::EPIPE; |
743 | $self->_error (&Errno::EPIPE, 1), last; |
640 | $self->error; |
|
|
641 | } |
744 | } |
642 | |
745 | |
643 | unshift @{ $self->{_queue} }, $cb; |
746 | unshift @{ $self->{_queue} }, $cb; |
644 | return; |
747 | last; |
645 | } |
748 | } |
646 | } elsif ($self->{on_read}) { |
749 | } elsif ($self->{on_read}) { |
|
|
750 | last unless $len; |
|
|
751 | |
647 | $self->{on_read}($self); |
752 | $self->{on_read}($self); |
648 | |
753 | |
649 | if ( |
754 | if ( |
650 | $self->{_eof} # if no further data will arrive |
|
|
651 | && $len == length $self->{rbuf} # and no data has been consumed |
755 | $len == length $self->{rbuf} # if no data has been consumed |
652 | && !@{ $self->{_queue} } # and the queue is still empty |
756 | && !@{ $self->{_queue} } # and the queue is still empty |
653 | && $self->{on_read} # and we still want to read data |
757 | && $self->{on_read} # but we still have on_read |
654 | ) { |
758 | ) { |
|
|
759 | # no further data will arrive |
655 | # then no progress can be made |
760 | # so no progress can be made |
656 | $! = &Errno::EPIPE; |
761 | $self->_error (&Errno::EPIPE, 1), last |
657 | $self->error; |
762 | if $self->{_eof}; |
|
|
763 | |
|
|
764 | last; # more data might arrive |
658 | } |
765 | } |
659 | } else { |
766 | } else { |
660 | # read side becomes idle |
767 | # read side becomes idle |
661 | delete $self->{_rw}; |
768 | delete $self->{_rw}; |
662 | return; |
769 | last; |
663 | } |
770 | } |
664 | } |
771 | } |
665 | |
772 | |
666 | $self->{on_eof}($self) |
773 | $self->{on_eof}($self) |
667 | if $self->{_eof} && $self->{on_eof}; |
774 | if $self->{_eof} && $self->{on_eof}; |
|
|
775 | |
|
|
776 | # may need to restart read watcher |
|
|
777 | unless ($self->{_rw}) { |
|
|
778 | $self->start_read |
|
|
779 | if $self->{on_read} || @{ $self->{_queue} }; |
|
|
780 | } |
668 | } |
781 | } |
669 | |
782 | |
670 | =item $handle->on_read ($cb) |
783 | =item $handle->on_read ($cb) |
671 | |
784 | |
672 | This replaces the currently set C<on_read> callback, or clears it (when |
785 | This replaces the currently set C<on_read> callback, or clears it (when |
… | |
… | |
677 | |
790 | |
678 | sub on_read { |
791 | sub on_read { |
679 | my ($self, $cb) = @_; |
792 | my ($self, $cb) = @_; |
680 | |
793 | |
681 | $self->{on_read} = $cb; |
794 | $self->{on_read} = $cb; |
|
|
795 | $self->_drain_rbuf if $cb && !$self->{_in_drain}; |
682 | } |
796 | } |
683 | |
797 | |
684 | =item $handle->rbuf |
798 | =item $handle->rbuf |
685 | |
799 | |
686 | Returns the read buffer (as a modifiable lvalue). |
800 | Returns the read buffer (as a modifiable lvalue). |
… | |
… | |
735 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
849 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
736 | ->($self, $cb, @_); |
850 | ->($self, $cb, @_); |
737 | } |
851 | } |
738 | |
852 | |
739 | push @{ $self->{_queue} }, $cb; |
853 | push @{ $self->{_queue} }, $cb; |
740 | $self->_drain_rbuf; |
854 | $self->_drain_rbuf unless $self->{_in_drain}; |
741 | } |
855 | } |
742 | |
856 | |
743 | sub unshift_read { |
857 | sub unshift_read { |
744 | my $self = shift; |
858 | my $self = shift; |
745 | my $cb = pop; |
859 | my $cb = pop; |
… | |
… | |
751 | ->($self, $cb, @_); |
865 | ->($self, $cb, @_); |
752 | } |
866 | } |
753 | |
867 | |
754 | |
868 | |
755 | unshift @{ $self->{_queue} }, $cb; |
869 | unshift @{ $self->{_queue} }, $cb; |
756 | $self->_drain_rbuf; |
870 | $self->_drain_rbuf unless $self->{_in_drain}; |
757 | } |
871 | } |
758 | |
872 | |
759 | =item $handle->push_read (type => @args, $cb) |
873 | =item $handle->push_read (type => @args, $cb) |
760 | |
874 | |
761 | =item $handle->unshift_read (type => @args, $cb) |
875 | =item $handle->unshift_read (type => @args, $cb) |
… | |
… | |
846 | |
960 | |
847 | sub unshift_read_line { |
961 | sub unshift_read_line { |
848 | my $self = shift; |
962 | my $self = shift; |
849 | $self->unshift_read (line => @_); |
963 | $self->unshift_read (line => @_); |
850 | } |
964 | } |
851 | |
|
|
852 | =item netstring => $cb->($handle, $string) |
|
|
853 | |
|
|
854 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
|
|
855 | |
|
|
856 | Throws an error with C<$!> set to EBADMSG on format violations. |
|
|
857 | |
|
|
858 | =cut |
|
|
859 | |
|
|
860 | register_read_type netstring => sub { |
|
|
861 | my ($self, $cb) = @_; |
|
|
862 | |
|
|
863 | sub { |
|
|
864 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
|
|
865 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
|
|
866 | $! = &Errno::EBADMSG; |
|
|
867 | $self->error; |
|
|
868 | } |
|
|
869 | return; |
|
|
870 | } |
|
|
871 | |
|
|
872 | my $len = $1; |
|
|
873 | |
|
|
874 | $self->unshift_read (chunk => $len, sub { |
|
|
875 | my $string = $_[1]; |
|
|
876 | $_[0]->unshift_read (chunk => 1, sub { |
|
|
877 | if ($_[1] eq ",") { |
|
|
878 | $cb->($_[0], $string); |
|
|
879 | } else { |
|
|
880 | $! = &Errno::EBADMSG; |
|
|
881 | $self->error; |
|
|
882 | } |
|
|
883 | }); |
|
|
884 | }); |
|
|
885 | |
|
|
886 | 1 |
|
|
887 | } |
|
|
888 | }; |
|
|
889 | |
965 | |
890 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
966 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
891 | |
967 | |
892 | Makes a regex match against the regex object C<$accept> and returns |
968 | Makes a regex match against the regex object C<$accept> and returns |
893 | everything up to and including the match. |
969 | everything up to and including the match. |
… | |
… | |
943 | return 1; |
1019 | return 1; |
944 | } |
1020 | } |
945 | |
1021 | |
946 | # reject |
1022 | # reject |
947 | if ($reject && $$rbuf =~ $reject) { |
1023 | if ($reject && $$rbuf =~ $reject) { |
948 | $! = &Errno::EBADMSG; |
1024 | $self->_error (&Errno::EBADMSG); |
949 | $self->error; |
|
|
950 | } |
1025 | } |
951 | |
1026 | |
952 | # skip |
1027 | # skip |
953 | if ($skip && $$rbuf =~ $skip) { |
1028 | if ($skip && $$rbuf =~ $skip) { |
954 | $data .= substr $$rbuf, 0, $+[0], ""; |
1029 | $data .= substr $$rbuf, 0, $+[0], ""; |
… | |
… | |
956 | |
1031 | |
957 | () |
1032 | () |
958 | } |
1033 | } |
959 | }; |
1034 | }; |
960 | |
1035 | |
|
|
1036 | =item netstring => $cb->($handle, $string) |
|
|
1037 | |
|
|
1038 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
|
|
1039 | |
|
|
1040 | Throws an error with C<$!> set to EBADMSG on format violations. |
|
|
1041 | |
|
|
1042 | =cut |
|
|
1043 | |
|
|
1044 | register_read_type netstring => sub { |
|
|
1045 | my ($self, $cb) = @_; |
|
|
1046 | |
|
|
1047 | sub { |
|
|
1048 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
|
|
1049 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
|
|
1050 | $self->_error (&Errno::EBADMSG); |
|
|
1051 | } |
|
|
1052 | return; |
|
|
1053 | } |
|
|
1054 | |
|
|
1055 | my $len = $1; |
|
|
1056 | |
|
|
1057 | $self->unshift_read (chunk => $len, sub { |
|
|
1058 | my $string = $_[1]; |
|
|
1059 | $_[0]->unshift_read (chunk => 1, sub { |
|
|
1060 | if ($_[1] eq ",") { |
|
|
1061 | $cb->($_[0], $string); |
|
|
1062 | } else { |
|
|
1063 | $self->_error (&Errno::EBADMSG); |
|
|
1064 | } |
|
|
1065 | }); |
|
|
1066 | }); |
|
|
1067 | |
|
|
1068 | 1 |
|
|
1069 | } |
|
|
1070 | }; |
|
|
1071 | |
|
|
1072 | =item packstring => $format, $cb->($handle, $string) |
|
|
1073 | |
|
|
1074 | An octet string prefixed with an encoded length. The encoding C<$format> |
|
|
1075 | uses the same format as a Perl C<pack> format, but must specify a single |
|
|
1076 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
|
|
1077 | optional C<!>, C<< < >> or C<< > >> modifier). |
|
|
1078 | |
|
|
1079 | DNS over TCP uses a prefix of C<n>, EPP uses a prefix of C<N>. |
|
|
1080 | |
|
|
1081 | Example: read a block of data prefixed by its length in BER-encoded |
|
|
1082 | format (very efficient). |
|
|
1083 | |
|
|
1084 | $handle->push_read (packstring => "w", sub { |
|
|
1085 | my ($handle, $data) = @_; |
|
|
1086 | }); |
|
|
1087 | |
|
|
1088 | =cut |
|
|
1089 | |
|
|
1090 | register_read_type packstring => sub { |
|
|
1091 | my ($self, $cb, $format) = @_; |
|
|
1092 | |
|
|
1093 | sub { |
|
|
1094 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
|
|
1095 | defined (my $len = eval { unpack $format, $_[0]->{rbuf} }) |
|
|
1096 | or return; |
|
|
1097 | |
|
|
1098 | # remove prefix |
|
|
1099 | substr $_[0]->{rbuf}, 0, (length pack $format, $len), ""; |
|
|
1100 | |
|
|
1101 | # read rest |
|
|
1102 | $_[0]->unshift_read (chunk => $len, $cb); |
|
|
1103 | |
|
|
1104 | 1 |
|
|
1105 | } |
|
|
1106 | }; |
|
|
1107 | |
961 | =item json => $cb->($handle, $hash_or_arrayref) |
1108 | =item json => $cb->($handle, $hash_or_arrayref) |
962 | |
1109 | |
963 | Reads a JSON object or array, decodes it and passes it to the callback. |
1110 | Reads a JSON object or array, decodes it and passes it to the callback. |
964 | |
1111 | |
965 | If a C<json> object was passed to the constructor, then that will be used |
1112 | If a C<json> object was passed to the constructor, then that will be used |
… | |
… | |
975 | the C<json> write type description, above, for an actual example. |
1122 | the C<json> write type description, above, for an actual example. |
976 | |
1123 | |
977 | =cut |
1124 | =cut |
978 | |
1125 | |
979 | register_read_type json => sub { |
1126 | register_read_type json => sub { |
980 | my ($self, $cb, $accept, $reject, $skip) = @_; |
1127 | my ($self, $cb) = @_; |
981 | |
1128 | |
982 | require JSON; |
1129 | require JSON; |
983 | |
1130 | |
984 | my $data; |
1131 | my $data; |
985 | my $rbuf = \$self->{rbuf}; |
1132 | my $rbuf = \$self->{rbuf}; |
… | |
… | |
1000 | () |
1147 | () |
1001 | } |
1148 | } |
1002 | } |
1149 | } |
1003 | }; |
1150 | }; |
1004 | |
1151 | |
|
|
1152 | =item storable => $cb->($handle, $ref) |
|
|
1153 | |
|
|
1154 | Deserialises a L<Storable> frozen representation as written by the |
|
|
1155 | C<storable> write type (BER-encoded length prefix followed by nfreeze'd |
|
|
1156 | data). |
|
|
1157 | |
|
|
1158 | Raises C<EBADMSG> error if the data could not be decoded. |
|
|
1159 | |
|
|
1160 | =cut |
|
|
1161 | |
|
|
1162 | register_read_type storable => sub { |
|
|
1163 | my ($self, $cb) = @_; |
|
|
1164 | |
|
|
1165 | require Storable; |
|
|
1166 | |
|
|
1167 | sub { |
|
|
1168 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
|
|
1169 | defined (my $len = eval { unpack "w", $_[0]->{rbuf} }) |
|
|
1170 | or return; |
|
|
1171 | |
|
|
1172 | # remove prefix |
|
|
1173 | substr $_[0]->{rbuf}, 0, (length pack "w", $len), ""; |
|
|
1174 | |
|
|
1175 | # read rest |
|
|
1176 | $_[0]->unshift_read (chunk => $len, sub { |
|
|
1177 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
|
|
1178 | $cb->($_[0], $ref); |
|
|
1179 | } else { |
|
|
1180 | $self->_error (&Errno::EBADMSG); |
|
|
1181 | } |
|
|
1182 | }); |
|
|
1183 | } |
|
|
1184 | }; |
|
|
1185 | |
1005 | =back |
1186 | =back |
1006 | |
1187 | |
1007 | =item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args) |
1188 | =item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args) |
1008 | |
1189 | |
1009 | This function (not method) lets you add your own types to C<push_read>. |
1190 | This function (not method) lets you add your own types to C<push_read>. |
… | |
… | |
1027 | =item $handle->stop_read |
1208 | =item $handle->stop_read |
1028 | |
1209 | |
1029 | =item $handle->start_read |
1210 | =item $handle->start_read |
1030 | |
1211 | |
1031 | In rare cases you actually do not want to read anything from the |
1212 | In rare cases you actually do not want to read anything from the |
1032 | socket. In this case you can call C<stop_read>. Neither C<on_read> no |
1213 | socket. In this case you can call C<stop_read>. Neither C<on_read> nor |
1033 | any queued callbacks will be executed then. To start reading again, call |
1214 | any queued callbacks will be executed then. To start reading again, call |
1034 | C<start_read>. |
1215 | C<start_read>. |
|
|
1216 | |
|
|
1217 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
|
|
1218 | you change the C<on_read> callback or push/unshift a read callback, and it |
|
|
1219 | will automatically C<stop_read> for you when neither C<on_read> is set nor |
|
|
1220 | there are any read requests in the queue. |
1035 | |
1221 | |
1036 | =cut |
1222 | =cut |
1037 | |
1223 | |
1038 | sub stop_read { |
1224 | sub stop_read { |
1039 | my ($self) = @_; |
1225 | my ($self) = @_; |
… | |
… | |
1054 | if ($len > 0) { |
1240 | if ($len > 0) { |
1055 | $self->{_activity} = AnyEvent->now; |
1241 | $self->{_activity} = AnyEvent->now; |
1056 | |
1242 | |
1057 | $self->{filter_r} |
1243 | $self->{filter_r} |
1058 | ? $self->{filter_r}($self, $rbuf) |
1244 | ? $self->{filter_r}($self, $rbuf) |
1059 | : $self->_drain_rbuf; |
1245 | : $self->{_in_drain} || $self->_drain_rbuf; |
1060 | |
1246 | |
1061 | } elsif (defined $len) { |
1247 | } elsif (defined $len) { |
1062 | delete $self->{_rw}; |
1248 | delete $self->{_rw}; |
1063 | $self->{_eof} = 1; |
1249 | $self->{_eof} = 1; |
1064 | $self->_drain_rbuf; |
1250 | $self->_drain_rbuf unless $self->{_in_drain}; |
1065 | |
1251 | |
1066 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
1252 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
1067 | return $self->error; |
1253 | return $self->_error ($!, 1); |
1068 | } |
1254 | } |
1069 | }); |
1255 | }); |
1070 | } |
1256 | } |
1071 | } |
1257 | } |
1072 | |
1258 | |
1073 | sub _dotls { |
1259 | sub _dotls { |
1074 | my ($self) = @_; |
1260 | my ($self) = @_; |
|
|
1261 | |
|
|
1262 | my $buf; |
1075 | |
1263 | |
1076 | if (length $self->{_tls_wbuf}) { |
1264 | if (length $self->{_tls_wbuf}) { |
1077 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1265 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1078 | substr $self->{_tls_wbuf}, 0, $len, ""; |
1266 | substr $self->{_tls_wbuf}, 0, $len, ""; |
1079 | } |
1267 | } |
1080 | } |
1268 | } |
1081 | |
1269 | |
1082 | if (defined (my $buf = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1270 | if (length ($buf = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1083 | $self->{wbuf} .= $buf; |
1271 | $self->{wbuf} .= $buf; |
1084 | $self->_drain_wbuf; |
1272 | $self->_drain_wbuf; |
1085 | } |
1273 | } |
1086 | |
1274 | |
1087 | while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) { |
1275 | while (defined ($buf = Net::SSLeay::read ($self->{tls}))) { |
|
|
1276 | if (length $buf) { |
1088 | $self->{rbuf} .= $buf; |
1277 | $self->{rbuf} .= $buf; |
1089 | $self->_drain_rbuf; |
1278 | $self->_drain_rbuf unless $self->{_in_drain}; |
|
|
1279 | } else { |
|
|
1280 | # let's treat SSL-eof as we treat normal EOF |
|
|
1281 | $self->{_eof} = 1; |
|
|
1282 | $self->_shutdown; |
|
|
1283 | return; |
|
|
1284 | } |
1090 | } |
1285 | } |
1091 | |
1286 | |
1092 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
1287 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
1093 | |
1288 | |
1094 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
1289 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
1095 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
1290 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
1096 | $self->error; |
1291 | return $self->_error ($!, 1); |
1097 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
1292 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
1098 | $! = &Errno::EIO; |
1293 | return $self->_error (&Errno::EIO, 1); |
1099 | $self->error; |
|
|
1100 | } |
1294 | } |
1101 | |
1295 | |
1102 | # all others are fine for our purposes |
1296 | # all others are fine for our purposes |
1103 | } |
1297 | } |
1104 | } |
1298 | } |
… | |
… | |
1181 | |
1375 | |
1182 | sub DESTROY { |
1376 | sub DESTROY { |
1183 | my $self = shift; |
1377 | my $self = shift; |
1184 | |
1378 | |
1185 | $self->stoptls; |
1379 | $self->stoptls; |
|
|
1380 | |
|
|
1381 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
|
|
1382 | |
|
|
1383 | if ($linger && length $self->{wbuf}) { |
|
|
1384 | my $fh = delete $self->{fh}; |
|
|
1385 | my $wbuf = delete $self->{wbuf}; |
|
|
1386 | |
|
|
1387 | my @linger; |
|
|
1388 | |
|
|
1389 | push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub { |
|
|
1390 | my $len = syswrite $fh, $wbuf, length $wbuf; |
|
|
1391 | |
|
|
1392 | if ($len > 0) { |
|
|
1393 | substr $wbuf, 0, $len, ""; |
|
|
1394 | } else { |
|
|
1395 | @linger = (); # end |
|
|
1396 | } |
|
|
1397 | }); |
|
|
1398 | push @linger, AnyEvent->timer (after => $linger, cb => sub { |
|
|
1399 | @linger = (); |
|
|
1400 | }); |
|
|
1401 | } |
1186 | } |
1402 | } |
1187 | |
1403 | |
1188 | =item AnyEvent::Handle::TLS_CTX |
1404 | =item AnyEvent::Handle::TLS_CTX |
1189 | |
1405 | |
1190 | This function creates and returns the Net::SSLeay::CTX object used by |
1406 | This function creates and returns the Net::SSLeay::CTX object used by |