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 = 4.232; |
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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49 | |
49 | |
50 | This module is a helper module to make it easier to do event-based I/O on |
50 | This module is a helper module to make it easier to do event-based I/O on |
51 | filehandles. For utility functions for doing non-blocking connects and accepts |
51 | filehandles. For utility functions for doing non-blocking connects and accepts |
52 | on sockets see L<AnyEvent::Util>. |
52 | on sockets see L<AnyEvent::Util>. |
53 | |
53 | |
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54 | The L<AnyEvent::Intro> tutorial contains some well-documented |
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55 | AnyEvent::Handle examples. |
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56 | |
54 | In the following, when the documentation refers to of "bytes" then this |
57 | In the following, when the documentation refers to of "bytes" then this |
55 | means characters. As sysread and syswrite are used for all I/O, their |
58 | means characters. As sysread and syswrite are used for all I/O, their |
56 | treatment of characters applies to this module as well. |
59 | treatment of characters applies to this module as well. |
57 | |
60 | |
58 | All callbacks will be invoked with the handle object as their first |
61 | All callbacks will be invoked with the handle object as their first |
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70 | |
73 | |
71 | =item fh => $filehandle [MANDATORY] |
74 | =item fh => $filehandle [MANDATORY] |
72 | |
75 | |
73 | The filehandle this L<AnyEvent::Handle> object will operate on. |
76 | The filehandle this L<AnyEvent::Handle> object will operate on. |
74 | |
77 | |
75 | NOTE: The filehandle will be set to non-blocking (using |
78 | NOTE: The filehandle will be set to non-blocking mode (using |
76 | AnyEvent::Util::fh_nonblocking). |
79 | C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in |
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80 | that mode. |
77 | |
81 | |
78 | =item on_eof => $cb->($handle) |
82 | =item on_eof => $cb->($handle) |
79 | |
83 | |
80 | Set the callback to be called when an end-of-file condition is detcted, |
84 | 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 |
85 | i.e. in the case of a socket, when the other side has closed the |
82 | connection cleanly. |
86 | connection cleanly. |
83 | |
87 | |
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88 | For sockets, this just means that the other side has stopped sending data, |
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89 | you can still try to write data, and, in fact, one can return from the eof |
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90 | callback and continue writing data, as only the read part has been shut |
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91 | down. |
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92 | |
84 | While not mandatory, it is highly recommended to set an eof callback, |
93 | 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 |
94 | otherwise you might end up with a closed socket while you are still |
86 | waiting for data. |
95 | waiting for data. |
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96 | |
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97 | If an EOF condition has been detected but no C<on_eof> callback has been |
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98 | set, then a fatal error will be raised with C<$!> set to <0>. |
87 | |
99 | |
88 | =item on_error => $cb->($handle, $fatal) |
100 | =item on_error => $cb->($handle, $fatal) |
89 | |
101 | |
90 | This is the error callback, which is called when, well, some error |
102 | This is the error callback, which is called when, well, some error |
91 | occured, such as not being able to resolve the hostname, failure to |
103 | occured, such as not being able to resolve the hostname, failure to |
92 | connect or a read error. |
104 | connect or a read error. |
93 | |
105 | |
94 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
106 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
95 | fatal errors the handle object will be shut down and will not be |
107 | fatal errors the handle object will be shut down and will not be usable |
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108 | (but you are free to look at the current C< ->rbuf >). Examples of fatal |
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109 | errors are an EOF condition with active (but unsatisifable) read watchers |
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110 | (C<EPIPE>) or I/O errors. |
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111 | |
96 | usable. Non-fatal errors can be retried by simply returning, but it is |
112 | Non-fatal errors can be retried by simply returning, but it is recommended |
97 | recommended to simply ignore this parameter and instead abondon the handle |
113 | to simply ignore this parameter and instead abondon the handle object |
98 | object when this callback is invoked. |
114 | when this callback is invoked. Examples of non-fatal errors are timeouts |
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115 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
99 | |
116 | |
100 | On callback entrance, the value of C<$!> contains the operating system |
117 | On callback entrance, the value of C<$!> contains the operating system |
101 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
118 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
102 | |
119 | |
103 | While not mandatory, it is I<highly> recommended to set this callback, as |
120 | While not mandatory, it is I<highly> recommended to set this callback, as |
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105 | C<croak>. |
122 | C<croak>. |
106 | |
123 | |
107 | =item on_read => $cb->($handle) |
124 | =item on_read => $cb->($handle) |
108 | |
125 | |
109 | This sets the default read callback, which is called when data arrives |
126 | This sets the default read callback, which is called when data arrives |
110 | and no read request is in the queue. |
127 | and no read request is in the queue (unlike read queue callbacks, this |
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128 | callback will only be called when at least one octet of data is in the |
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129 | read buffer). |
111 | |
130 | |
112 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
131 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
113 | method or access the C<$handle->{rbuf}> member directly. |
132 | method or access the C<$handle->{rbuf}> member directly. |
114 | |
133 | |
115 | When an EOF condition is detected then AnyEvent::Handle will first try to |
134 | When an EOF condition is detected then AnyEvent::Handle will first try to |
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121 | |
140 | |
122 | This sets the callback that is called when the write buffer becomes empty |
141 | 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). |
142 | (or when the callback is set and the buffer is empty already). |
124 | |
143 | |
125 | To append to the write buffer, use the C<< ->push_write >> method. |
144 | To append to the write buffer, use the C<< ->push_write >> method. |
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145 | |
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146 | This callback is useful when you don't want to put all of your write data |
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147 | into the queue at once, for example, when you want to write the contents |
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148 | of some file to the socket you might not want to read the whole file into |
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149 | memory and push it into the queue, but instead only read more data from |
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150 | the file when the write queue becomes empty. |
126 | |
151 | |
127 | =item timeout => $fractional_seconds |
152 | =item timeout => $fractional_seconds |
128 | |
153 | |
129 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
154 | 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 |
155 | 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 |
179 | 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 |
180 | (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 |
181 | amount of data without a callback ever being called as long as the line |
157 | isn't finished). |
182 | isn't finished). |
158 | |
183 | |
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184 | =item autocork => <boolean> |
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185 | |
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186 | When disabled (the default), then C<push_write> will try to immediately |
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187 | write the data to the handle if possible. This avoids having to register |
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188 | a write watcher and wait for the next event loop iteration, but can be |
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189 | inefficient if you write multiple small chunks (this disadvantage is |
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190 | usually avoided by your kernel's nagle algorithm, see C<low_delay>). |
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191 | |
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192 | When enabled, then writes will always be queued till the next event loop |
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193 | iteration. This is efficient when you do many small writes per iteration, |
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194 | but less efficient when you do a single write only. |
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195 | |
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196 | =item no_delay => <boolean> |
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197 | |
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198 | When doing small writes on sockets, your operating system kernel might |
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199 | wait a bit for more data before actually sending it out. This is called |
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200 | the Nagle algorithm, and usually it is beneficial. |
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201 | |
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202 | In some situations you want as low a delay as possible, which cna be |
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203 | accomplishd by setting this option to true. |
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204 | |
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205 | The default is your opertaing system's default behaviour, this option |
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206 | explicitly enables or disables it, if possible. |
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207 | |
159 | =item read_size => <bytes> |
208 | =item read_size => <bytes> |
160 | |
209 | |
161 | The default read block size (the amount of bytes this module will try to read |
210 | The default read block size (the amount of bytes this module will try to read |
162 | during each (loop iteration). Default: C<8192>. |
211 | during each (loop iteration). Default: C<8192>. |
163 | |
212 | |
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165 | |
214 | |
166 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
215 | 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 |
216 | buffer: If the write reaches this size or gets even samller it is |
168 | considered empty. |
217 | considered empty. |
169 | |
218 | |
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219 | =item linger => <seconds> |
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220 | |
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221 | If non-zero (default: C<3600>), then the destructor of the |
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222 | AnyEvent::Handle object will check wether there is still outstanding write |
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223 | data and will install a watcher that will write out this data. No errors |
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224 | will be reported (this mostly matches how the operating system treats |
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225 | outstanding data at socket close time). |
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226 | |
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227 | This will not work for partial TLS data that could not yet been |
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228 | encoded. This data will be lost. |
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229 | |
170 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
230 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
171 | |
231 | |
172 | When this parameter is given, it enables TLS (SSL) mode, that means it |
232 | When this parameter is given, it enables TLS (SSL) mode, that means |
173 | will start making tls handshake and will transparently encrypt/decrypt |
233 | AnyEvent will start a TLS handshake and will transparently encrypt/decrypt |
174 | data. |
234 | data. |
175 | |
235 | |
176 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
236 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
177 | automatically when you try to create a TLS handle). |
237 | automatically when you try to create a TLS handle). |
178 | |
238 | |
179 | For the TLS server side, use C<accept>, and for the TLS client side of a |
239 | Unlike TCP, TLS has a server and client side: for the TLS server side, use |
180 | connection, use C<connect> mode. |
240 | C<accept>, and for the TLS client side of a connection, use C<connect> |
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241 | mode. |
181 | |
242 | |
182 | You can also provide your own TLS connection object, but you have |
243 | 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> |
244 | 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 |
245 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
185 | AnyEvent::Handle. |
246 | AnyEvent::Handle. |
186 | |
247 | |
187 | See the C<starttls> method if you need to start TLs negotiation later. |
248 | See the C<starttls> method for when need to start TLS negotiation later. |
188 | |
249 | |
189 | =item tls_ctx => $ssl_ctx |
250 | =item tls_ctx => $ssl_ctx |
190 | |
251 | |
191 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
252 | 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 |
253 | (unless a connection object was specified directly). If this parameter is |
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195 | =item json => JSON or JSON::XS object |
256 | =item json => JSON or JSON::XS object |
196 | |
257 | |
197 | This is the json coder object used by the C<json> read and write types. |
258 | This is the json coder object used by the C<json> read and write types. |
198 | |
259 | |
199 | If you don't supply it, then AnyEvent::Handle will create and use a |
260 | If you don't supply it, then AnyEvent::Handle will create and use a |
200 | suitable one, which will write and expect UTF-8 encoded JSON texts. |
261 | suitable one (on demand), which will write and expect UTF-8 encoded JSON |
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262 | texts. |
201 | |
263 | |
202 | Note that you are responsible to depend on the JSON module if you want to |
264 | Note that you are responsible to depend on the JSON module if you want to |
203 | use this functionality, as AnyEvent does not have a dependency itself. |
265 | use this functionality, as AnyEvent does not have a dependency itself. |
204 | |
266 | |
205 | =item filter_r => $cb |
267 | =item filter_r => $cb |
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224 | if ($self->{tls}) { |
286 | if ($self->{tls}) { |
225 | require Net::SSLeay; |
287 | require Net::SSLeay; |
226 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
288 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
227 | } |
289 | } |
228 | |
290 | |
229 | # $self->on_eof (delete $self->{on_eof} ) if $self->{on_eof}; # nop |
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230 | # $self->on_error (delete $self->{on_error}) if $self->{on_error}; # nop |
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231 | # $self->on_read (delete $self->{on_read} ) if $self->{on_read}; # nop |
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232 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
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233 | |
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234 | $self->{_activity} = AnyEvent->now; |
291 | $self->{_activity} = AnyEvent->now; |
235 | $self->_timeout; |
292 | $self->_timeout; |
236 | |
293 | |
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294 | $self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain}; |
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295 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
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296 | |
237 | $self->start_read; |
297 | $self->start_read |
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298 | if $self->{on_read}; |
238 | |
299 | |
239 | $self |
300 | $self |
240 | } |
301 | } |
241 | |
302 | |
242 | sub _shutdown { |
303 | sub _shutdown { |
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246 | delete $self->{_rw}; |
307 | delete $self->{_rw}; |
247 | delete $self->{_ww}; |
308 | delete $self->{_ww}; |
248 | delete $self->{fh}; |
309 | delete $self->{fh}; |
249 | |
310 | |
250 | $self->stoptls; |
311 | $self->stoptls; |
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312 | |
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313 | delete $self->{on_read}; |
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314 | delete $self->{_queue}; |
251 | } |
315 | } |
252 | |
316 | |
253 | sub _error { |
317 | sub _error { |
254 | my ($self, $errno, $fatal) = @_; |
318 | my ($self, $errno, $fatal) = @_; |
255 | |
319 | |
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301 | |
365 | |
302 | =cut |
366 | =cut |
303 | |
367 | |
304 | sub on_timeout { |
368 | sub on_timeout { |
305 | $_[0]{on_timeout} = $_[1]; |
369 | $_[0]{on_timeout} = $_[1]; |
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370 | } |
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371 | |
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372 | =item $handle->autocork ($boolean) |
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373 | |
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374 | Enables or disables the current autocork behaviour (see C<autocork> |
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375 | constructor argument). |
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376 | |
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377 | =cut |
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378 | |
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379 | =item $handle->no_delay ($boolean) |
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380 | |
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381 | Enables or disables the C<no_delay> setting (see constructor argument of |
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382 | the same name for details). |
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383 | |
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384 | =cut |
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385 | |
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386 | sub no_delay { |
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387 | $_[0]{no_delay} = $_[1]; |
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388 | |
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389 | eval { |
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390 | local $SIG{__DIE__}; |
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391 | setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]; |
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392 | }; |
306 | } |
393 | } |
307 | |
394 | |
308 | ############################################################################# |
395 | ############################################################################# |
309 | |
396 | |
310 | =item $handle->timeout ($seconds) |
397 | =item $handle->timeout ($seconds) |
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425 | $self->_error ($!, 1); |
512 | $self->_error ($!, 1); |
426 | } |
513 | } |
427 | }; |
514 | }; |
428 | |
515 | |
429 | # try to write data immediately |
516 | # try to write data immediately |
430 | $cb->(); |
517 | $cb->() unless $self->{autocork}; |
431 | |
518 | |
432 | # if still data left in wbuf, we need to poll |
519 | # if still data left in wbuf, we need to poll |
433 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
520 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
434 | if length $self->{wbuf}; |
521 | if length $self->{wbuf}; |
435 | }; |
522 | }; |
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480 | my ($self, $string) = @_; |
567 | my ($self, $string) = @_; |
481 | |
568 | |
482 | sprintf "%d:%s,", (length $string), $string |
569 | sprintf "%d:%s,", (length $string), $string |
483 | }; |
570 | }; |
484 | |
571 | |
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572 | =item packstring => $format, $data |
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573 | |
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574 | An octet string prefixed with an encoded length. The encoding C<$format> |
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575 | uses the same format as a Perl C<pack> format, but must specify a single |
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576 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
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577 | optional C<!>, C<< < >> or C<< > >> modifier). |
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578 | |
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579 | =cut |
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580 | |
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581 | register_write_type packstring => sub { |
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582 | my ($self, $format, $string) = @_; |
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583 | |
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584 | pack "$format/a*", $string |
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585 | }; |
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586 | |
485 | =item json => $array_or_hashref |
587 | =item json => $array_or_hashref |
486 | |
588 | |
487 | Encodes the given hash or array reference into a JSON object. Unless you |
589 | Encodes the given hash or array reference into a JSON object. Unless you |
488 | provide your own JSON object, this means it will be encoded to JSON text |
590 | provide your own JSON object, this means it will be encoded to JSON text |
489 | in UTF-8. |
591 | in UTF-8. |
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521 | |
623 | |
522 | $self->{json} ? $self->{json}->encode ($ref) |
624 | $self->{json} ? $self->{json}->encode ($ref) |
523 | : JSON::encode_json ($ref) |
625 | : JSON::encode_json ($ref) |
524 | }; |
626 | }; |
525 | |
627 | |
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628 | =item storable => $reference |
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629 | |
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630 | Freezes the given reference using L<Storable> and writes it to the |
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631 | handle. Uses the C<nfreeze> format. |
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632 | |
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633 | =cut |
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634 | |
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635 | register_write_type storable => sub { |
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636 | my ($self, $ref) = @_; |
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637 | |
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638 | require Storable; |
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639 | |
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640 | pack "w/a*", Storable::nfreeze ($ref) |
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641 | }; |
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642 | |
526 | =back |
643 | =back |
527 | |
644 | |
528 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
645 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
529 | |
646 | |
530 | This function (not method) lets you add your own types to C<push_write>. |
647 | This function (not method) lets you add your own types to C<push_write>. |
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552 | ways, the "simple" way, using only C<on_read> and the "complex" way, using |
669 | ways, the "simple" way, using only C<on_read> and the "complex" way, using |
553 | a queue. |
670 | a queue. |
554 | |
671 | |
555 | In the simple case, you just install an C<on_read> callback and whenever |
672 | In the simple case, you just install an C<on_read> callback and whenever |
556 | new data arrives, it will be called. You can then remove some data (if |
673 | new data arrives, it will be called. You can then remove some data (if |
557 | enough is there) from the read buffer (C<< $handle->rbuf >>) if you want |
674 | enough is there) from the read buffer (C<< $handle->rbuf >>). Or you cna |
558 | or not. |
675 | leave the data there if you want to accumulate more (e.g. when only a |
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676 | partial message has been received so far). |
559 | |
677 | |
560 | In the more complex case, you want to queue multiple callbacks. In this |
678 | In the more complex case, you want to queue multiple callbacks. In this |
561 | case, AnyEvent::Handle will call the first queued callback each time new |
679 | case, AnyEvent::Handle will call the first queued callback each time new |
562 | data arrives and removes it when it has done its job (see C<push_read>, |
680 | data arrives (also the first time it is queued) and removes it when it has |
563 | below). |
681 | done its job (see C<push_read>, below). |
564 | |
682 | |
565 | This way you can, for example, push three line-reads, followed by reading |
683 | This way you can, for example, push three line-reads, followed by reading |
566 | a chunk of data, and AnyEvent::Handle will execute them in order. |
684 | a chunk of data, and AnyEvent::Handle will execute them in order. |
567 | |
685 | |
568 | Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by |
686 | Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by |
… | |
… | |
581 | # handle xml |
699 | # handle xml |
582 | }); |
700 | }); |
583 | }); |
701 | }); |
584 | }); |
702 | }); |
585 | |
703 | |
586 | Example 2: Implement a client for a protocol that replies either with |
704 | Example 2: Implement a client for a protocol that replies either with "OK" |
587 | "OK" and another line or "ERROR" for one request, and 64 bytes for the |
705 | and another line or "ERROR" for the first request that is sent, and 64 |
588 | second request. Due tot he availability of a full queue, we can just |
706 | bytes for the second request. Due to the availability of a queue, we can |
589 | pipeline sending both requests and manipulate the queue as necessary in |
707 | just pipeline sending both requests and manipulate the queue as necessary |
590 | the callbacks: |
708 | in the callbacks. |
591 | |
709 | |
592 | # request one |
710 | When the first callback is called and sees an "OK" response, it will |
|
|
711 | C<unshift> another line-read. This line-read will be queued I<before> the |
|
|
712 | 64-byte chunk callback. |
|
|
713 | |
|
|
714 | # request one, returns either "OK + extra line" or "ERROR" |
593 | $handle->push_write ("request 1\015\012"); |
715 | $handle->push_write ("request 1\015\012"); |
594 | |
716 | |
595 | # we expect "ERROR" or "OK" as response, so push a line read |
717 | # we expect "ERROR" or "OK" as response, so push a line read |
596 | $handle->push_read (line => sub { |
718 | $handle->push_read (line => sub { |
597 | # if we got an "OK", we have to _prepend_ another line, |
719 | # if we got an "OK", we have to _prepend_ another line, |
… | |
… | |
604 | ... |
726 | ... |
605 | }); |
727 | }); |
606 | } |
728 | } |
607 | }); |
729 | }); |
608 | |
730 | |
609 | # request two |
731 | # request two, simply returns 64 octets |
610 | $handle->push_write ("request 2\015\012"); |
732 | $handle->push_write ("request 2\015\012"); |
611 | |
733 | |
612 | # simply read 64 bytes, always |
734 | # simply read 64 bytes, always |
613 | $handle->push_read (chunk => 64, sub { |
735 | $handle->push_read (chunk => 64, sub { |
614 | my $response = $_[1]; |
736 | my $response = $_[1]; |
… | |
… | |
620 | =cut |
742 | =cut |
621 | |
743 | |
622 | sub _drain_rbuf { |
744 | sub _drain_rbuf { |
623 | my ($self) = @_; |
745 | my ($self) = @_; |
624 | |
746 | |
|
|
747 | local $self->{_in_drain} = 1; |
|
|
748 | |
625 | if ( |
749 | if ( |
626 | defined $self->{rbuf_max} |
750 | defined $self->{rbuf_max} |
627 | && $self->{rbuf_max} < length $self->{rbuf} |
751 | && $self->{rbuf_max} < length $self->{rbuf} |
628 | ) { |
752 | ) { |
629 | return $self->_error (&Errno::ENOSPC, 1); |
753 | $self->_error (&Errno::ENOSPC, 1), return; |
630 | } |
754 | } |
631 | |
755 | |
632 | return if $self->{in_drain}; |
756 | while () { |
633 | local $self->{in_drain} = 1; |
|
|
634 | |
|
|
635 | while (my $len = length $self->{rbuf}) { |
757 | my $len = length $self->{rbuf}; |
636 | no strict 'refs'; |
758 | |
637 | if (my $cb = shift @{ $self->{_queue} }) { |
759 | if (my $cb = shift @{ $self->{_queue} }) { |
638 | unless ($cb->($self)) { |
760 | unless ($cb->($self)) { |
639 | if ($self->{_eof}) { |
761 | if ($self->{_eof}) { |
640 | # no progress can be made (not enough data and no data forthcoming) |
762 | # no progress can be made (not enough data and no data forthcoming) |
641 | return $self->_error (&Errno::EPIPE, 1); |
763 | $self->_error (&Errno::EPIPE, 1), return; |
642 | } |
764 | } |
643 | |
765 | |
644 | unshift @{ $self->{_queue} }, $cb; |
766 | unshift @{ $self->{_queue} }, $cb; |
645 | last; |
767 | last; |
646 | } |
768 | } |
647 | } elsif ($self->{on_read}) { |
769 | } elsif ($self->{on_read}) { |
|
|
770 | last unless $len; |
|
|
771 | |
648 | $self->{on_read}($self); |
772 | $self->{on_read}($self); |
649 | |
773 | |
650 | if ( |
774 | if ( |
651 | $len == length $self->{rbuf} # if no data has been consumed |
775 | $len == length $self->{rbuf} # if no data has been consumed |
652 | && !@{ $self->{_queue} } # and the queue is still empty |
776 | && !@{ $self->{_queue} } # and the queue is still empty |
653 | && $self->{on_read} # but we still have on_read |
777 | && $self->{on_read} # but we still have on_read |
654 | ) { |
778 | ) { |
655 | # no further data will arrive |
779 | # no further data will arrive |
656 | # so no progress can be made |
780 | # so no progress can be made |
657 | return $self->_error (&Errno::EPIPE, 1) |
781 | $self->_error (&Errno::EPIPE, 1), return |
658 | if $self->{_eof}; |
782 | if $self->{_eof}; |
659 | |
783 | |
660 | last; # more data might arrive |
784 | last; # more data might arrive |
661 | } |
785 | } |
662 | } else { |
786 | } else { |
… | |
… | |
664 | delete $self->{_rw}; |
788 | delete $self->{_rw}; |
665 | last; |
789 | last; |
666 | } |
790 | } |
667 | } |
791 | } |
668 | |
792 | |
|
|
793 | if ($self->{_eof}) { |
|
|
794 | if ($self->{on_eof}) { |
669 | $self->{on_eof}($self) |
795 | $self->{on_eof}($self) |
670 | if $self->{_eof} && $self->{on_eof}; |
796 | } else { |
|
|
797 | $self->_error (0, 1); |
|
|
798 | } |
|
|
799 | } |
671 | |
800 | |
672 | # may need to restart read watcher |
801 | # may need to restart read watcher |
673 | unless ($self->{_rw}) { |
802 | unless ($self->{_rw}) { |
674 | $self->start_read |
803 | $self->start_read |
675 | if $self->{on_read} || @{ $self->{_queue} }; |
804 | if $self->{on_read} || @{ $self->{_queue} }; |
… | |
… | |
686 | |
815 | |
687 | sub on_read { |
816 | sub on_read { |
688 | my ($self, $cb) = @_; |
817 | my ($self, $cb) = @_; |
689 | |
818 | |
690 | $self->{on_read} = $cb; |
819 | $self->{on_read} = $cb; |
|
|
820 | $self->_drain_rbuf if $cb && !$self->{_in_drain}; |
691 | } |
821 | } |
692 | |
822 | |
693 | =item $handle->rbuf |
823 | =item $handle->rbuf |
694 | |
824 | |
695 | Returns the read buffer (as a modifiable lvalue). |
825 | Returns the read buffer (as a modifiable lvalue). |
… | |
… | |
744 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
874 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
745 | ->($self, $cb, @_); |
875 | ->($self, $cb, @_); |
746 | } |
876 | } |
747 | |
877 | |
748 | push @{ $self->{_queue} }, $cb; |
878 | push @{ $self->{_queue} }, $cb; |
749 | $self->_drain_rbuf; |
879 | $self->_drain_rbuf unless $self->{_in_drain}; |
750 | } |
880 | } |
751 | |
881 | |
752 | sub unshift_read { |
882 | sub unshift_read { |
753 | my $self = shift; |
883 | my $self = shift; |
754 | my $cb = pop; |
884 | my $cb = pop; |
… | |
… | |
760 | ->($self, $cb, @_); |
890 | ->($self, $cb, @_); |
761 | } |
891 | } |
762 | |
892 | |
763 | |
893 | |
764 | unshift @{ $self->{_queue} }, $cb; |
894 | unshift @{ $self->{_queue} }, $cb; |
765 | $self->_drain_rbuf; |
895 | $self->_drain_rbuf unless $self->{_in_drain}; |
766 | } |
896 | } |
767 | |
897 | |
768 | =item $handle->push_read (type => @args, $cb) |
898 | =item $handle->push_read (type => @args, $cb) |
769 | |
899 | |
770 | =item $handle->unshift_read (type => @args, $cb) |
900 | =item $handle->unshift_read (type => @args, $cb) |
… | |
… | |
800 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
930 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
801 | 1 |
931 | 1 |
802 | } |
932 | } |
803 | }; |
933 | }; |
804 | |
934 | |
805 | # compatibility with older API |
|
|
806 | sub push_read_chunk { |
|
|
807 | $_[0]->push_read (chunk => $_[1], $_[2]); |
|
|
808 | } |
|
|
809 | |
|
|
810 | sub unshift_read_chunk { |
|
|
811 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
|
|
812 | } |
|
|
813 | |
|
|
814 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
935 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
815 | |
936 | |
816 | The callback will be called only once a full line (including the end of |
937 | The callback will be called only once a full line (including the end of |
817 | line marker, C<$eol>) has been read. This line (excluding the end of line |
938 | line marker, C<$eol>) has been read. This line (excluding the end of line |
818 | marker) will be passed to the callback as second argument (C<$line>), and |
939 | marker) will be passed to the callback as second argument (C<$line>), and |
… | |
… | |
833 | =cut |
954 | =cut |
834 | |
955 | |
835 | register_read_type line => sub { |
956 | register_read_type line => sub { |
836 | my ($self, $cb, $eol) = @_; |
957 | my ($self, $cb, $eol) = @_; |
837 | |
958 | |
838 | $eol = qr|(\015?\012)| if @_ < 3; |
959 | if (@_ < 3) { |
839 | $eol = quotemeta $eol unless ref $eol; |
960 | # this is more than twice as fast as the generic code below |
840 | $eol = qr|^(.*?)($eol)|s; |
|
|
841 | |
|
|
842 | sub { |
961 | sub { |
843 | $_[0]{rbuf} =~ s/$eol// or return; |
962 | $_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return; |
844 | |
963 | |
845 | $cb->($_[0], $1, $2); |
964 | $cb->($_[0], $1, $2); |
846 | 1 |
|
|
847 | } |
|
|
848 | }; |
|
|
849 | |
|
|
850 | # compatibility with older API |
|
|
851 | sub push_read_line { |
|
|
852 | my $self = shift; |
|
|
853 | $self->push_read (line => @_); |
|
|
854 | } |
|
|
855 | |
|
|
856 | sub unshift_read_line { |
|
|
857 | my $self = shift; |
|
|
858 | $self->unshift_read (line => @_); |
|
|
859 | } |
|
|
860 | |
|
|
861 | =item netstring => $cb->($handle, $string) |
|
|
862 | |
|
|
863 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
|
|
864 | |
|
|
865 | Throws an error with C<$!> set to EBADMSG on format violations. |
|
|
866 | |
|
|
867 | =cut |
|
|
868 | |
|
|
869 | register_read_type netstring => sub { |
|
|
870 | my ($self, $cb) = @_; |
|
|
871 | |
|
|
872 | sub { |
|
|
873 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
|
|
874 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
|
|
875 | $self->_error (&Errno::EBADMSG); |
|
|
876 | } |
965 | 1 |
877 | return; |
|
|
878 | } |
966 | } |
|
|
967 | } else { |
|
|
968 | $eol = quotemeta $eol unless ref $eol; |
|
|
969 | $eol = qr|^(.*?)($eol)|s; |
879 | |
970 | |
880 | my $len = $1; |
971 | sub { |
|
|
972 | $_[0]{rbuf} =~ s/$eol// or return; |
881 | |
973 | |
882 | $self->unshift_read (chunk => $len, sub { |
974 | $cb->($_[0], $1, $2); |
883 | my $string = $_[1]; |
|
|
884 | $_[0]->unshift_read (chunk => 1, sub { |
|
|
885 | if ($_[1] eq ",") { |
|
|
886 | $cb->($_[0], $string); |
|
|
887 | } else { |
|
|
888 | $self->_error (&Errno::EBADMSG); |
|
|
889 | } |
|
|
890 | }); |
975 | 1 |
891 | }); |
976 | } |
892 | |
|
|
893 | 1 |
|
|
894 | } |
977 | } |
895 | }; |
978 | }; |
896 | |
979 | |
897 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
980 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
898 | |
981 | |
… | |
… | |
962 | |
1045 | |
963 | () |
1046 | () |
964 | } |
1047 | } |
965 | }; |
1048 | }; |
966 | |
1049 | |
|
|
1050 | =item netstring => $cb->($handle, $string) |
|
|
1051 | |
|
|
1052 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
|
|
1053 | |
|
|
1054 | Throws an error with C<$!> set to EBADMSG on format violations. |
|
|
1055 | |
|
|
1056 | =cut |
|
|
1057 | |
|
|
1058 | register_read_type netstring => sub { |
|
|
1059 | my ($self, $cb) = @_; |
|
|
1060 | |
|
|
1061 | sub { |
|
|
1062 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
|
|
1063 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
|
|
1064 | $self->_error (&Errno::EBADMSG); |
|
|
1065 | } |
|
|
1066 | return; |
|
|
1067 | } |
|
|
1068 | |
|
|
1069 | my $len = $1; |
|
|
1070 | |
|
|
1071 | $self->unshift_read (chunk => $len, sub { |
|
|
1072 | my $string = $_[1]; |
|
|
1073 | $_[0]->unshift_read (chunk => 1, sub { |
|
|
1074 | if ($_[1] eq ",") { |
|
|
1075 | $cb->($_[0], $string); |
|
|
1076 | } else { |
|
|
1077 | $self->_error (&Errno::EBADMSG); |
|
|
1078 | } |
|
|
1079 | }); |
|
|
1080 | }); |
|
|
1081 | |
|
|
1082 | 1 |
|
|
1083 | } |
|
|
1084 | }; |
|
|
1085 | |
|
|
1086 | =item packstring => $format, $cb->($handle, $string) |
|
|
1087 | |
|
|
1088 | An octet string prefixed with an encoded length. The encoding C<$format> |
|
|
1089 | uses the same format as a Perl C<pack> format, but must specify a single |
|
|
1090 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
|
|
1091 | optional C<!>, C<< < >> or C<< > >> modifier). |
|
|
1092 | |
|
|
1093 | DNS over TCP uses a prefix of C<n>, EPP uses a prefix of C<N>. |
|
|
1094 | |
|
|
1095 | Example: read a block of data prefixed by its length in BER-encoded |
|
|
1096 | format (very efficient). |
|
|
1097 | |
|
|
1098 | $handle->push_read (packstring => "w", sub { |
|
|
1099 | my ($handle, $data) = @_; |
|
|
1100 | }); |
|
|
1101 | |
|
|
1102 | =cut |
|
|
1103 | |
|
|
1104 | register_read_type packstring => sub { |
|
|
1105 | my ($self, $cb, $format) = @_; |
|
|
1106 | |
|
|
1107 | sub { |
|
|
1108 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
|
|
1109 | defined (my $len = eval { unpack $format, $_[0]{rbuf} }) |
|
|
1110 | or return; |
|
|
1111 | |
|
|
1112 | $format = length pack $format, $len; |
|
|
1113 | |
|
|
1114 | # bypass unshift if we already have the remaining chunk |
|
|
1115 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1116 | my $data = substr $_[0]{rbuf}, $format, $len; |
|
|
1117 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1118 | $cb->($_[0], $data); |
|
|
1119 | } else { |
|
|
1120 | # remove prefix |
|
|
1121 | substr $_[0]{rbuf}, 0, $format, ""; |
|
|
1122 | |
|
|
1123 | # read remaining chunk |
|
|
1124 | $_[0]->unshift_read (chunk => $len, $cb); |
|
|
1125 | } |
|
|
1126 | |
|
|
1127 | 1 |
|
|
1128 | } |
|
|
1129 | }; |
|
|
1130 | |
967 | =item json => $cb->($handle, $hash_or_arrayref) |
1131 | =item json => $cb->($handle, $hash_or_arrayref) |
968 | |
1132 | |
969 | Reads a JSON object or array, decodes it and passes it to the callback. |
1133 | Reads a JSON object or array, decodes it and passes it to the callback. |
970 | |
1134 | |
971 | If a C<json> object was passed to the constructor, then that will be used |
1135 | If a C<json> object was passed to the constructor, then that will be used |
… | |
… | |
981 | the C<json> write type description, above, for an actual example. |
1145 | the C<json> write type description, above, for an actual example. |
982 | |
1146 | |
983 | =cut |
1147 | =cut |
984 | |
1148 | |
985 | register_read_type json => sub { |
1149 | register_read_type json => sub { |
986 | my ($self, $cb, $accept, $reject, $skip) = @_; |
1150 | my ($self, $cb) = @_; |
987 | |
1151 | |
988 | require JSON; |
1152 | require JSON; |
989 | |
1153 | |
990 | my $data; |
1154 | my $data; |
991 | my $rbuf = \$self->{rbuf}; |
1155 | my $rbuf = \$self->{rbuf}; |
… | |
… | |
1006 | () |
1170 | () |
1007 | } |
1171 | } |
1008 | } |
1172 | } |
1009 | }; |
1173 | }; |
1010 | |
1174 | |
|
|
1175 | =item storable => $cb->($handle, $ref) |
|
|
1176 | |
|
|
1177 | Deserialises a L<Storable> frozen representation as written by the |
|
|
1178 | C<storable> write type (BER-encoded length prefix followed by nfreeze'd |
|
|
1179 | data). |
|
|
1180 | |
|
|
1181 | Raises C<EBADMSG> error if the data could not be decoded. |
|
|
1182 | |
|
|
1183 | =cut |
|
|
1184 | |
|
|
1185 | register_read_type storable => sub { |
|
|
1186 | my ($self, $cb) = @_; |
|
|
1187 | |
|
|
1188 | require Storable; |
|
|
1189 | |
|
|
1190 | sub { |
|
|
1191 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
|
|
1192 | defined (my $len = eval { unpack "w", $_[0]{rbuf} }) |
|
|
1193 | or return; |
|
|
1194 | |
|
|
1195 | my $format = length pack "w", $len; |
|
|
1196 | |
|
|
1197 | # bypass unshift if we already have the remaining chunk |
|
|
1198 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1199 | my $data = substr $_[0]{rbuf}, $format, $len; |
|
|
1200 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1201 | $cb->($_[0], Storable::thaw ($data)); |
|
|
1202 | } else { |
|
|
1203 | # remove prefix |
|
|
1204 | substr $_[0]{rbuf}, 0, $format, ""; |
|
|
1205 | |
|
|
1206 | # read remaining chunk |
|
|
1207 | $_[0]->unshift_read (chunk => $len, sub { |
|
|
1208 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
|
|
1209 | $cb->($_[0], $ref); |
|
|
1210 | } else { |
|
|
1211 | $self->_error (&Errno::EBADMSG); |
|
|
1212 | } |
|
|
1213 | }); |
|
|
1214 | } |
|
|
1215 | |
|
|
1216 | 1 |
|
|
1217 | } |
|
|
1218 | }; |
|
|
1219 | |
1011 | =back |
1220 | =back |
1012 | |
1221 | |
1013 | =item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args) |
1222 | =item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args) |
1014 | |
1223 | |
1015 | This function (not method) lets you add your own types to C<push_read>. |
1224 | This function (not method) lets you add your own types to C<push_read>. |
… | |
… | |
1033 | =item $handle->stop_read |
1242 | =item $handle->stop_read |
1034 | |
1243 | |
1035 | =item $handle->start_read |
1244 | =item $handle->start_read |
1036 | |
1245 | |
1037 | In rare cases you actually do not want to read anything from the |
1246 | In rare cases you actually do not want to read anything from the |
1038 | socket. In this case you can call C<stop_read>. Neither C<on_read> no |
1247 | socket. In this case you can call C<stop_read>. Neither C<on_read> nor |
1039 | any queued callbacks will be executed then. To start reading again, call |
1248 | any queued callbacks will be executed then. To start reading again, call |
1040 | C<start_read>. |
1249 | C<start_read>. |
1041 | |
1250 | |
1042 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
1251 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
1043 | you change the C<on_read> callback or push/unshift a read callback, and it |
1252 | you change the C<on_read> callback or push/unshift a read callback, and it |
… | |
… | |
1065 | if ($len > 0) { |
1274 | if ($len > 0) { |
1066 | $self->{_activity} = AnyEvent->now; |
1275 | $self->{_activity} = AnyEvent->now; |
1067 | |
1276 | |
1068 | $self->{filter_r} |
1277 | $self->{filter_r} |
1069 | ? $self->{filter_r}($self, $rbuf) |
1278 | ? $self->{filter_r}($self, $rbuf) |
1070 | : $self->_drain_rbuf; |
1279 | : $self->{_in_drain} || $self->_drain_rbuf; |
1071 | |
1280 | |
1072 | } elsif (defined $len) { |
1281 | } elsif (defined $len) { |
1073 | delete $self->{_rw}; |
1282 | delete $self->{_rw}; |
1074 | $self->{_eof} = 1; |
1283 | $self->{_eof} = 1; |
1075 | $self->_drain_rbuf; |
1284 | $self->_drain_rbuf unless $self->{_in_drain}; |
1076 | |
1285 | |
1077 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
1286 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
1078 | return $self->_error ($!, 1); |
1287 | return $self->_error ($!, 1); |
1079 | } |
1288 | } |
1080 | }); |
1289 | }); |
… | |
… | |
1098 | } |
1307 | } |
1099 | |
1308 | |
1100 | while (defined ($buf = Net::SSLeay::read ($self->{tls}))) { |
1309 | while (defined ($buf = Net::SSLeay::read ($self->{tls}))) { |
1101 | if (length $buf) { |
1310 | if (length $buf) { |
1102 | $self->{rbuf} .= $buf; |
1311 | $self->{rbuf} .= $buf; |
1103 | $self->_drain_rbuf; |
1312 | $self->_drain_rbuf unless $self->{_in_drain}; |
1104 | } else { |
1313 | } else { |
1105 | # let's treat SSL-eof as we treat normal EOF |
1314 | # let's treat SSL-eof as we treat normal EOF |
1106 | $self->{_eof} = 1; |
1315 | $self->{_eof} = 1; |
1107 | $self->_shutdown; |
1316 | $self->_shutdown; |
1108 | return; |
1317 | return; |
… | |
… | |
1200 | |
1409 | |
1201 | sub DESTROY { |
1410 | sub DESTROY { |
1202 | my $self = shift; |
1411 | my $self = shift; |
1203 | |
1412 | |
1204 | $self->stoptls; |
1413 | $self->stoptls; |
|
|
1414 | |
|
|
1415 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
|
|
1416 | |
|
|
1417 | if ($linger && length $self->{wbuf}) { |
|
|
1418 | my $fh = delete $self->{fh}; |
|
|
1419 | my $wbuf = delete $self->{wbuf}; |
|
|
1420 | |
|
|
1421 | my @linger; |
|
|
1422 | |
|
|
1423 | push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub { |
|
|
1424 | my $len = syswrite $fh, $wbuf, length $wbuf; |
|
|
1425 | |
|
|
1426 | if ($len > 0) { |
|
|
1427 | substr $wbuf, 0, $len, ""; |
|
|
1428 | } else { |
|
|
1429 | @linger = (); # end |
|
|
1430 | } |
|
|
1431 | }); |
|
|
1432 | push @linger, AnyEvent->timer (after => $linger, cb => sub { |
|
|
1433 | @linger = (); |
|
|
1434 | }); |
|
|
1435 | } |
1205 | } |
1436 | } |
1206 | |
1437 | |
1207 | =item AnyEvent::Handle::TLS_CTX |
1438 | =item AnyEvent::Handle::TLS_CTX |
1208 | |
1439 | |
1209 | This function creates and returns the Net::SSLeay::CTX object used by |
1440 | This function creates and returns the Net::SSLeay::CTX object used by |
… | |
… | |
1251 | =over 4 |
1482 | =over 4 |
1252 | |
1483 | |
1253 | =item * all constructor arguments become object members. |
1484 | =item * all constructor arguments become object members. |
1254 | |
1485 | |
1255 | At least initially, when you pass a C<tls>-argument to the constructor it |
1486 | At least initially, when you pass a C<tls>-argument to the constructor it |
1256 | will end up in C<< $handle->{tls} >>. Those members might be changes or |
1487 | will end up in C<< $handle->{tls} >>. Those members might be changed or |
1257 | mutated later on (for example C<tls> will hold the TLS connection object). |
1488 | mutated later on (for example C<tls> will hold the TLS connection object). |
1258 | |
1489 | |
1259 | =item * other object member names are prefixed with an C<_>. |
1490 | =item * other object member names are prefixed with an C<_>. |
1260 | |
1491 | |
1261 | All object members not explicitly documented (internal use) are prefixed |
1492 | All object members not explicitly documented (internal use) are prefixed |