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(WSAWOULDBLOCK); |
7 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
8 | use Scalar::Util (); |
8 | use Scalar::Util (); |
9 | use Carp (); |
9 | use Carp (); |
10 | use Fcntl (); |
10 | use Fcntl (); |
11 | use Errno qw/EAGAIN EINTR/; |
11 | use Errno qw(EAGAIN EINTR); |
12 | |
12 | |
13 | =head1 NAME |
13 | =head1 NAME |
14 | |
14 | |
15 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
15 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
16 | |
16 | |
17 | =cut |
17 | =cut |
18 | |
18 | |
19 | our $VERSION = '0.04'; |
19 | our $VERSION = 4.22; |
20 | |
20 | |
21 | =head1 SYNOPSIS |
21 | =head1 SYNOPSIS |
22 | |
22 | |
23 | use AnyEvent; |
23 | use AnyEvent; |
24 | use AnyEvent::Handle; |
24 | use AnyEvent::Handle; |
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75 | NOTE: The filehandle will be set to non-blocking (using |
75 | NOTE: The filehandle will be set to non-blocking (using |
76 | AnyEvent::Util::fh_nonblocking). |
76 | AnyEvent::Util::fh_nonblocking). |
77 | |
77 | |
78 | =item on_eof => $cb->($handle) |
78 | =item on_eof => $cb->($handle) |
79 | |
79 | |
80 | Set the callback to be called on EOF. |
80 | Set the callback to be called when an end-of-file condition is detected, |
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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> or C<EBADMSG>). |
101 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
97 | |
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98 | The callback should throw an exception. If it returns, then |
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99 | AnyEvent::Handle will C<croak> for you. |
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100 | |
102 | |
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 |
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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. |
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134 | |
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135 | =item timeout => $fractional_seconds |
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136 | |
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137 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
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138 | seconds pass without a successful read or write on the underlying file |
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139 | handle, the C<on_timeout> callback will be invoked (and if that one is |
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140 | missing, an C<ETIMEDOUT> error will be raised). |
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141 | |
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142 | Note that timeout processing is also active when you currently do not have |
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143 | any outstanding read or write requests: If you plan to keep the connection |
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144 | idle then you should disable the timout temporarily or ignore the timeout |
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145 | in the C<on_timeout> callback. |
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146 | |
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147 | Zero (the default) disables this timeout. |
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148 | |
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149 | =item on_timeout => $cb->($handle) |
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150 | |
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151 | Called whenever the inactivity timeout passes. If you return from this |
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152 | callback, then the timeout will be reset as if some activity had happened, |
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153 | so this condition is not fatal in any way. |
124 | |
154 | |
125 | =item rbuf_max => <bytes> |
155 | =item rbuf_max => <bytes> |
126 | |
156 | |
127 | If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>) |
157 | If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>) |
128 | when the read buffer ever (strictly) exceeds this size. This is useful to |
158 | when the read buffer ever (strictly) exceeds this size. This is useful to |
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132 | 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 |
133 | (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 |
134 | 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 |
135 | isn't finished). |
165 | isn't finished). |
136 | |
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 | |
137 | =item read_size => <bytes> |
191 | =item read_size => <bytes> |
138 | |
192 | |
139 | 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 |
140 | on each [loop iteration). Default: C<4096>. |
194 | during each (loop iteration). Default: C<8192>. |
141 | |
195 | |
142 | =item low_water_mark => <bytes> |
196 | =item low_water_mark => <bytes> |
143 | |
197 | |
144 | 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 |
145 | 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 |
146 | 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. |
147 | |
212 | |
148 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
213 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
149 | |
214 | |
150 | 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 |
151 | will start making tls handshake and will transparently encrypt/decrypt |
216 | will start making tls handshake and will transparently encrypt/decrypt |
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160 | You can also provide your own TLS connection object, but you have |
225 | You can also provide your own TLS connection object, but you have |
161 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
226 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
162 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
227 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
163 | AnyEvent::Handle. |
228 | AnyEvent::Handle. |
164 | |
229 | |
165 | See the C<starttls> method if you need to start TLs negotiation later. |
230 | See the C<starttls> method if you need to start TLS negotiation later. |
166 | |
231 | |
167 | =item tls_ctx => $ssl_ctx |
232 | =item tls_ctx => $ssl_ctx |
168 | |
233 | |
169 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
234 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
170 | (unless a connection object was specified directly). If this parameter is |
235 | (unless a connection object was specified directly). If this parameter is |
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172 | |
237 | |
173 | =item json => JSON or JSON::XS object |
238 | =item json => JSON or JSON::XS object |
174 | |
239 | |
175 | This is the json coder object used by the C<json> read and write types. |
240 | This is the json coder object used by the C<json> read and write types. |
176 | |
241 | |
177 | If you don't supply it, then AnyEvent::Handle will use C<encode_json> and |
242 | If you don't supply it, then AnyEvent::Handle will create and use a |
178 | C<decode_json>. |
243 | suitable one, which will write and expect UTF-8 encoded JSON texts. |
179 | |
244 | |
180 | Note that you are responsible to depend on the JSON module if you want to |
245 | Note that you are responsible to depend on the JSON module if you want to |
181 | use this functionality, as AnyEvent does not have a dependency itself. |
246 | use this functionality, as AnyEvent does not have a dependency itself. |
182 | |
247 | |
183 | =item filter_r => $cb |
248 | =item filter_r => $cb |
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202 | if ($self->{tls}) { |
267 | if ($self->{tls}) { |
203 | require Net::SSLeay; |
268 | require Net::SSLeay; |
204 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
269 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
205 | } |
270 | } |
206 | |
271 | |
207 | $self->on_eof (delete $self->{on_eof} ) if $self->{on_eof}; |
272 | $self->{_activity} = AnyEvent->now; |
208 | $self->on_error (delete $self->{on_error}) if $self->{on_error}; |
273 | $self->_timeout; |
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274 | |
209 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
275 | $self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain}; |
210 | $self->on_read (delete $self->{on_read} ) if $self->{on_read}; |
276 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
211 | |
277 | |
212 | $self->start_read; |
278 | $self->start_read |
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279 | if $self->{on_read}; |
213 | |
280 | |
214 | $self |
281 | $self |
215 | } |
282 | } |
216 | |
283 | |
217 | sub _shutdown { |
284 | sub _shutdown { |
218 | my ($self) = @_; |
285 | my ($self) = @_; |
219 | |
286 | |
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287 | delete $self->{_tw}; |
220 | delete $self->{_rw}; |
288 | delete $self->{_rw}; |
221 | delete $self->{_ww}; |
289 | delete $self->{_ww}; |
222 | delete $self->{fh}; |
290 | delete $self->{fh}; |
223 | } |
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224 | |
291 | |
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292 | $self->stoptls; |
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293 | } |
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294 | |
225 | sub error { |
295 | sub _error { |
226 | my ($self) = @_; |
296 | my ($self, $errno, $fatal) = @_; |
227 | |
297 | |
228 | { |
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229 | local $!; |
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230 | $self->_shutdown; |
298 | $self->_shutdown |
231 | } |
299 | if $fatal; |
232 | |
300 | |
233 | $self->{on_error}($self) |
301 | $! = $errno; |
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302 | |
234 | if $self->{on_error}; |
303 | if ($self->{on_error}) { |
235 | |
304 | $self->{on_error}($self, $fatal); |
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305 | } else { |
236 | Carp::croak "AnyEvent::Handle uncaught fatal error: $!"; |
306 | Carp::croak "AnyEvent::Handle uncaught error: $!"; |
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307 | } |
237 | } |
308 | } |
238 | |
309 | |
239 | =item $fh = $handle->fh |
310 | =item $fh = $handle->fh |
240 | |
311 | |
241 | 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. |
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260 | |
331 | |
261 | =cut |
332 | =cut |
262 | |
333 | |
263 | sub on_eof { |
334 | sub on_eof { |
264 | $_[0]{on_eof} = $_[1]; |
335 | $_[0]{on_eof} = $_[1]; |
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336 | } |
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337 | |
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338 | =item $handle->on_timeout ($cb) |
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339 | |
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340 | Replace the current C<on_timeout> callback, or disables the callback |
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341 | (but not the timeout) if C<$cb> = C<undef>. See C<timeout> constructor |
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342 | argument. |
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343 | |
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344 | =cut |
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345 | |
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346 | sub on_timeout { |
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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 | }; |
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371 | } |
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372 | |
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373 | ############################################################################# |
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374 | |
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375 | =item $handle->timeout ($seconds) |
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376 | |
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377 | Configures (or disables) the inactivity timeout. |
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378 | |
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379 | =cut |
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380 | |
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381 | sub timeout { |
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382 | my ($self, $timeout) = @_; |
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383 | |
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384 | $self->{timeout} = $timeout; |
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385 | $self->_timeout; |
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386 | } |
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387 | |
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388 | # reset the timeout watcher, as neccessary |
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389 | # also check for time-outs |
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390 | sub _timeout { |
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391 | my ($self) = @_; |
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392 | |
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393 | if ($self->{timeout}) { |
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394 | my $NOW = AnyEvent->now; |
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395 | |
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396 | # when would the timeout trigger? |
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397 | my $after = $self->{_activity} + $self->{timeout} - $NOW; |
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398 | |
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399 | # now or in the past already? |
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400 | if ($after <= 0) { |
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401 | $self->{_activity} = $NOW; |
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402 | |
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403 | if ($self->{on_timeout}) { |
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404 | $self->{on_timeout}($self); |
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405 | } else { |
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406 | $self->_error (&Errno::ETIMEDOUT); |
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407 | } |
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408 | |
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409 | # callback could have changed timeout value, optimise |
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410 | return unless $self->{timeout}; |
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411 | |
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412 | # calculate new after |
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413 | $after = $self->{timeout}; |
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414 | } |
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415 | |
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416 | Scalar::Util::weaken $self; |
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417 | return unless $self; # ->error could have destroyed $self |
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418 | |
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419 | $self->{_tw} ||= AnyEvent->timer (after => $after, cb => sub { |
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420 | delete $self->{_tw}; |
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421 | $self->_timeout; |
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422 | }); |
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423 | } else { |
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424 | delete $self->{_tw}; |
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425 | } |
265 | } |
426 | } |
266 | |
427 | |
267 | ############################################################################# |
428 | ############################################################################# |
268 | |
429 | |
269 | =back |
430 | =back |
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316 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
477 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
317 | |
478 | |
318 | if ($len >= 0) { |
479 | if ($len >= 0) { |
319 | substr $self->{wbuf}, 0, $len, ""; |
480 | substr $self->{wbuf}, 0, $len, ""; |
320 | |
481 | |
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482 | $self->{_activity} = AnyEvent->now; |
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483 | |
321 | $self->{on_drain}($self) |
484 | $self->{on_drain}($self) |
322 | if $self->{low_water_mark} >= length $self->{wbuf} |
485 | if $self->{low_water_mark} >= length $self->{wbuf} |
323 | && $self->{on_drain}; |
486 | && $self->{on_drain}; |
324 | |
487 | |
325 | delete $self->{_ww} unless length $self->{wbuf}; |
488 | delete $self->{_ww} unless length $self->{wbuf}; |
326 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAWOULDBLOCK) { |
489 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
327 | $self->error; |
490 | $self->_error ($!, 1); |
328 | } |
491 | } |
329 | }; |
492 | }; |
330 | |
493 | |
331 | # try to write data immediately |
494 | # try to write data immediately |
332 | $cb->(); |
495 | $cb->() unless $self->{autocork}; |
333 | |
496 | |
334 | # if still data left in wbuf, we need to poll |
497 | # if still data left in wbuf, we need to poll |
335 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
498 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
336 | if length $self->{wbuf}; |
499 | if length $self->{wbuf}; |
337 | }; |
500 | }; |
… | |
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352 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
515 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
353 | ->($self, @_); |
516 | ->($self, @_); |
354 | } |
517 | } |
355 | |
518 | |
356 | if ($self->{filter_w}) { |
519 | if ($self->{filter_w}) { |
357 | $self->{filter_w}->($self, \$_[0]); |
520 | $self->{filter_w}($self, \$_[0]); |
358 | } else { |
521 | } else { |
359 | $self->{wbuf} .= $_[0]; |
522 | $self->{wbuf} .= $_[0]; |
360 | $self->_drain_wbuf; |
523 | $self->_drain_wbuf; |
361 | } |
524 | } |
362 | } |
525 | } |
363 | |
526 | |
364 | =item $handle->push_write (type => @args) |
527 | =item $handle->push_write (type => @args) |
365 | |
528 | |
366 | =item $handle->unshift_write (type => @args) |
|
|
367 | |
|
|
368 | 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 |
369 | the job by specifying a type and type-specific arguments. |
530 | the job by specifying a type and type-specific arguments. |
370 | |
531 | |
371 | 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 |
372 | drop by and tell us): |
533 | drop by and tell us): |
… | |
… | |
376 | =item netstring => $string |
537 | =item netstring => $string |
377 | |
538 | |
378 | Formats the given value as netstring |
539 | Formats the given value as netstring |
379 | (http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them). |
540 | (http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them). |
380 | |
541 | |
381 | =back |
|
|
382 | |
|
|
383 | =cut |
542 | =cut |
384 | |
543 | |
385 | register_write_type netstring => sub { |
544 | register_write_type netstring => sub { |
386 | my ($self, $string) = @_; |
545 | my ($self, $string) = @_; |
387 | |
546 | |
388 | sprintf "%d:%s,", (length $string), $string |
547 | sprintf "%d:%s,", (length $string), $string |
|
|
548 | }; |
|
|
549 | |
|
|
550 | =item packstring => $format, $data |
|
|
551 | |
|
|
552 | An octet string prefixed with an encoded length. The encoding C<$format> |
|
|
553 | uses the same format as a Perl C<pack> format, but must specify a single |
|
|
554 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
|
|
555 | optional C<!>, C<< < >> or C<< > >> modifier). |
|
|
556 | |
|
|
557 | =cut |
|
|
558 | |
|
|
559 | register_write_type packstring => sub { |
|
|
560 | my ($self, $format, $string) = @_; |
|
|
561 | |
|
|
562 | pack "$format/a*", $string |
389 | }; |
563 | }; |
390 | |
564 | |
391 | =item json => $array_or_hashref |
565 | =item json => $array_or_hashref |
392 | |
566 | |
393 | 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 |
… | |
… | |
396 | |
570 | |
397 | JSON objects (and arrays) are self-delimiting, so you can write JSON at |
571 | JSON objects (and arrays) are self-delimiting, so you can write JSON at |
398 | one end of a handle and read them at the other end without using any |
572 | one end of a handle and read them at the other end without using any |
399 | additional framing. |
573 | additional framing. |
400 | |
574 | |
|
|
575 | The generated JSON text is guaranteed not to contain any newlines: While |
|
|
576 | this module doesn't need delimiters after or between JSON texts to be |
|
|
577 | able to read them, many other languages depend on that. |
|
|
578 | |
|
|
579 | A simple RPC protocol that interoperates easily with others is to send |
|
|
580 | JSON arrays (or objects, although arrays are usually the better choice as |
|
|
581 | they mimic how function argument passing works) and a newline after each |
|
|
582 | JSON text: |
|
|
583 | |
|
|
584 | $handle->push_write (json => ["method", "arg1", "arg2"]); # whatever |
|
|
585 | $handle->push_write ("\012"); |
|
|
586 | |
|
|
587 | An AnyEvent::Handle receiver would simply use the C<json> read type and |
|
|
588 | rely on the fact that the newline will be skipped as leading whitespace: |
|
|
589 | |
|
|
590 | $handle->push_read (json => sub { my $array = $_[1]; ... }); |
|
|
591 | |
|
|
592 | Other languages could read single lines terminated by a newline and pass |
|
|
593 | this line into their JSON decoder of choice. |
|
|
594 | |
401 | =cut |
595 | =cut |
402 | |
596 | |
403 | register_write_type json => sub { |
597 | register_write_type json => sub { |
404 | my ($self, $ref) = @_; |
598 | my ($self, $ref) = @_; |
405 | |
599 | |
… | |
… | |
407 | |
601 | |
408 | $self->{json} ? $self->{json}->encode ($ref) |
602 | $self->{json} ? $self->{json}->encode ($ref) |
409 | : JSON::encode_json ($ref) |
603 | : JSON::encode_json ($ref) |
410 | }; |
604 | }; |
411 | |
605 | |
|
|
606 | =item storable => $reference |
|
|
607 | |
|
|
608 | Freezes the given reference using L<Storable> and writes it to the |
|
|
609 | handle. Uses the C<nfreeze> format. |
|
|
610 | |
|
|
611 | =cut |
|
|
612 | |
|
|
613 | register_write_type storable => sub { |
|
|
614 | my ($self, $ref) = @_; |
|
|
615 | |
|
|
616 | require Storable; |
|
|
617 | |
|
|
618 | pack "w/a*", Storable::nfreeze ($ref) |
|
|
619 | }; |
|
|
620 | |
|
|
621 | =back |
|
|
622 | |
412 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
623 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
413 | |
624 | |
414 | 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>. |
415 | 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 |
416 | reference with the handle object and the remaining arguments. |
627 | reference with the handle object and the remaining arguments. |
… | |
… | |
436 | 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 |
437 | a queue. |
648 | a queue. |
438 | |
649 | |
439 | 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 |
440 | 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 |
441 | 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 |
442 | or not. |
653 | leave the data there if you want to accumulate more (e.g. when only a |
|
|
654 | partial message has been received so far). |
443 | |
655 | |
444 | 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 |
445 | 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 |
446 | 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 |
447 | below). |
659 | done its job (see C<push_read>, below). |
448 | |
660 | |
449 | 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 |
450 | 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. |
451 | |
663 | |
452 | 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 |
453 | the specified number of bytes which give an XML datagram. |
665 | the specified number of bytes which give an XML datagram. |
454 | |
666 | |
455 | # in the default state, expect some header bytes |
667 | # in the default state, expect some header bytes |
456 | $handle->on_read (sub { |
668 | $handle->on_read (sub { |
457 | # 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) |
458 | shift->unshift_read_chunk (4, sub { |
670 | shift->unshift_read (chunk => 4, sub { |
459 | # header arrived, decode |
671 | # header arrived, decode |
460 | my $len = unpack "N", $_[1]; |
672 | my $len = unpack "N", $_[1]; |
461 | |
673 | |
462 | # now read the payload |
674 | # now read the payload |
463 | shift->unshift_read_chunk ($len, sub { |
675 | shift->unshift_read (chunk => $len, sub { |
464 | my $xml = $_[1]; |
676 | my $xml = $_[1]; |
465 | # handle xml |
677 | # handle xml |
466 | }); |
678 | }); |
467 | }); |
679 | }); |
468 | }); |
680 | }); |
469 | |
681 | |
470 | 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" |
471 | "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 |
472 | 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 |
473 | pipeline sending both requests and manipulate the queue as necessary in |
685 | just pipeline sending both requests and manipulate the queue as necessary |
474 | the callbacks: |
686 | in the callbacks. |
475 | |
687 | |
476 | # 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" |
477 | $handle->push_write ("request 1\015\012"); |
693 | $handle->push_write ("request 1\015\012"); |
478 | |
694 | |
479 | # 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 |
480 | $handle->push_read_line (sub { |
696 | $handle->push_read (line => sub { |
481 | # if we got an "OK", we have to _prepend_ another line, |
697 | # if we got an "OK", we have to _prepend_ another line, |
482 | # so it will be read before the second request reads its 64 bytes |
698 | # so it will be read before the second request reads its 64 bytes |
483 | # which are already in the queue when this callback is called |
699 | # which are already in the queue when this callback is called |
484 | # we don't do this in case we got an error |
700 | # we don't do this in case we got an error |
485 | if ($_[1] eq "OK") { |
701 | if ($_[1] eq "OK") { |
486 | $_[0]->unshift_read_line (sub { |
702 | $_[0]->unshift_read (line => sub { |
487 | my $response = $_[1]; |
703 | my $response = $_[1]; |
488 | ... |
704 | ... |
489 | }); |
705 | }); |
490 | } |
706 | } |
491 | }); |
707 | }); |
492 | |
708 | |
493 | # request two |
709 | # request two, simply returns 64 octets |
494 | $handle->push_write ("request 2\015\012"); |
710 | $handle->push_write ("request 2\015\012"); |
495 | |
711 | |
496 | # simply read 64 bytes, always |
712 | # simply read 64 bytes, always |
497 | $handle->push_read_chunk (64, sub { |
713 | $handle->push_read (chunk => 64, sub { |
498 | my $response = $_[1]; |
714 | my $response = $_[1]; |
499 | ... |
715 | ... |
500 | }); |
716 | }); |
501 | |
717 | |
502 | =over 4 |
718 | =over 4 |
503 | |
719 | |
504 | =cut |
720 | =cut |
505 | |
721 | |
506 | sub _drain_rbuf { |
722 | sub _drain_rbuf { |
507 | my ($self) = @_; |
723 | my ($self) = @_; |
|
|
724 | |
|
|
725 | local $self->{_in_drain} = 1; |
508 | |
726 | |
509 | if ( |
727 | if ( |
510 | defined $self->{rbuf_max} |
728 | defined $self->{rbuf_max} |
511 | && $self->{rbuf_max} < length $self->{rbuf} |
729 | && $self->{rbuf_max} < length $self->{rbuf} |
512 | ) { |
730 | ) { |
513 | $! = &Errno::ENOSPC; |
731 | return $self->_error (&Errno::ENOSPC, 1); |
514 | $self->error; |
|
|
515 | } |
732 | } |
516 | |
733 | |
517 | return if $self->{in_drain}; |
734 | while () { |
518 | local $self->{in_drain} = 1; |
|
|
519 | |
|
|
520 | while (my $len = length $self->{rbuf}) { |
735 | my $len = length $self->{rbuf}; |
521 | no strict 'refs'; |
736 | |
522 | if (my $cb = shift @{ $self->{_queue} }) { |
737 | if (my $cb = shift @{ $self->{_queue} }) { |
523 | unless ($cb->($self)) { |
738 | unless ($cb->($self)) { |
524 | if ($self->{_eof}) { |
739 | if ($self->{_eof}) { |
525 | # no progress can be made (not enough data and no data forthcoming) |
740 | # no progress can be made (not enough data and no data forthcoming) |
526 | $! = &Errno::EPIPE; |
741 | $self->_error (&Errno::EPIPE, 1), last; |
527 | $self->error; |
|
|
528 | } |
742 | } |
529 | |
743 | |
530 | unshift @{ $self->{_queue} }, $cb; |
744 | unshift @{ $self->{_queue} }, $cb; |
531 | return; |
745 | last; |
532 | } |
746 | } |
533 | } elsif ($self->{on_read}) { |
747 | } elsif ($self->{on_read}) { |
|
|
748 | last unless $len; |
|
|
749 | |
534 | $self->{on_read}($self); |
750 | $self->{on_read}($self); |
535 | |
751 | |
536 | if ( |
752 | if ( |
537 | $self->{_eof} # if no further data will arrive |
|
|
538 | && $len == length $self->{rbuf} # and no data has been consumed |
753 | $len == length $self->{rbuf} # if no data has been consumed |
539 | && !@{ $self->{_queue} } # and the queue is still empty |
754 | && !@{ $self->{_queue} } # and the queue is still empty |
540 | && $self->{on_read} # and we still want to read data |
755 | && $self->{on_read} # but we still have on_read |
541 | ) { |
756 | ) { |
|
|
757 | # no further data will arrive |
542 | # then no progress can be made |
758 | # so no progress can be made |
543 | $! = &Errno::EPIPE; |
759 | $self->_error (&Errno::EPIPE, 1), last |
544 | $self->error; |
760 | if $self->{_eof}; |
|
|
761 | |
|
|
762 | last; # more data might arrive |
545 | } |
763 | } |
546 | } else { |
764 | } else { |
547 | # read side becomes idle |
765 | # read side becomes idle |
548 | delete $self->{_rw}; |
766 | delete $self->{_rw}; |
549 | return; |
767 | last; |
550 | } |
768 | } |
551 | } |
769 | } |
552 | |
770 | |
553 | if ($self->{_eof}) { |
|
|
554 | $self->_shutdown; |
|
|
555 | $self->{on_eof}($self) |
771 | $self->{on_eof}($self) |
556 | if $self->{on_eof}; |
772 | if $self->{_eof} && $self->{on_eof}; |
|
|
773 | |
|
|
774 | # may need to restart read watcher |
|
|
775 | unless ($self->{_rw}) { |
|
|
776 | $self->start_read |
|
|
777 | if $self->{on_read} || @{ $self->{_queue} }; |
557 | } |
778 | } |
558 | } |
779 | } |
559 | |
780 | |
560 | =item $handle->on_read ($cb) |
781 | =item $handle->on_read ($cb) |
561 | |
782 | |
… | |
… | |
567 | |
788 | |
568 | sub on_read { |
789 | sub on_read { |
569 | my ($self, $cb) = @_; |
790 | my ($self, $cb) = @_; |
570 | |
791 | |
571 | $self->{on_read} = $cb; |
792 | $self->{on_read} = $cb; |
|
|
793 | $self->_drain_rbuf if $cb && !$self->{_in_drain}; |
572 | } |
794 | } |
573 | |
795 | |
574 | =item $handle->rbuf |
796 | =item $handle->rbuf |
575 | |
797 | |
576 | Returns the read buffer (as a modifiable lvalue). |
798 | Returns the read buffer (as a modifiable lvalue). |
… | |
… | |
625 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
847 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
626 | ->($self, $cb, @_); |
848 | ->($self, $cb, @_); |
627 | } |
849 | } |
628 | |
850 | |
629 | push @{ $self->{_queue} }, $cb; |
851 | push @{ $self->{_queue} }, $cb; |
630 | $self->_drain_rbuf; |
852 | $self->_drain_rbuf unless $self->{_in_drain}; |
631 | } |
853 | } |
632 | |
854 | |
633 | sub unshift_read { |
855 | sub unshift_read { |
634 | my $self = shift; |
856 | my $self = shift; |
635 | my $cb = pop; |
857 | my $cb = pop; |
… | |
… | |
641 | ->($self, $cb, @_); |
863 | ->($self, $cb, @_); |
642 | } |
864 | } |
643 | |
865 | |
644 | |
866 | |
645 | unshift @{ $self->{_queue} }, $cb; |
867 | unshift @{ $self->{_queue} }, $cb; |
646 | $self->_drain_rbuf; |
868 | $self->_drain_rbuf unless $self->{_in_drain}; |
647 | } |
869 | } |
648 | |
870 | |
649 | =item $handle->push_read (type => @args, $cb) |
871 | =item $handle->push_read (type => @args, $cb) |
650 | |
872 | |
651 | =item $handle->unshift_read (type => @args, $cb) |
873 | =item $handle->unshift_read (type => @args, $cb) |
… | |
… | |
681 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
903 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
682 | 1 |
904 | 1 |
683 | } |
905 | } |
684 | }; |
906 | }; |
685 | |
907 | |
686 | # compatibility with older API |
|
|
687 | sub push_read_chunk { |
|
|
688 | $_[0]->push_read (chunk => $_[1], $_[2]); |
|
|
689 | } |
|
|
690 | |
|
|
691 | sub unshift_read_chunk { |
|
|
692 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
|
|
693 | } |
|
|
694 | |
|
|
695 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
908 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
696 | |
909 | |
697 | The callback will be called only once a full line (including the end of |
910 | The callback will be called only once a full line (including the end of |
698 | line marker, C<$eol>) has been read. This line (excluding the end of line |
911 | line marker, C<$eol>) has been read. This line (excluding the end of line |
699 | marker) will be passed to the callback as second argument (C<$line>), and |
912 | marker) will be passed to the callback as second argument (C<$line>), and |
… | |
… | |
714 | =cut |
927 | =cut |
715 | |
928 | |
716 | register_read_type line => sub { |
929 | register_read_type line => sub { |
717 | my ($self, $cb, $eol) = @_; |
930 | my ($self, $cb, $eol) = @_; |
718 | |
931 | |
719 | $eol = qr|(\015?\012)| if @_ < 3; |
932 | if (@_ < 3) { |
720 | $eol = quotemeta $eol unless ref $eol; |
933 | # this is more than twice as fast as the generic code below |
721 | $eol = qr|^(.*?)($eol)|s; |
|
|
722 | |
|
|
723 | sub { |
934 | sub { |
724 | $_[0]{rbuf} =~ s/$eol// or return; |
935 | $_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return; |
725 | |
936 | |
726 | $cb->($_[0], $1, $2); |
937 | $cb->($_[0], $1, $2); |
727 | 1 |
|
|
728 | } |
|
|
729 | }; |
|
|
730 | |
|
|
731 | # compatibility with older API |
|
|
732 | sub push_read_line { |
|
|
733 | my $self = shift; |
|
|
734 | $self->push_read (line => @_); |
|
|
735 | } |
|
|
736 | |
|
|
737 | sub unshift_read_line { |
|
|
738 | my $self = shift; |
|
|
739 | $self->unshift_read (line => @_); |
|
|
740 | } |
|
|
741 | |
|
|
742 | =item netstring => $cb->($handle, $string) |
|
|
743 | |
|
|
744 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
|
|
745 | |
|
|
746 | Throws an error with C<$!> set to EBADMSG on format violations. |
|
|
747 | |
|
|
748 | =cut |
|
|
749 | |
|
|
750 | register_read_type netstring => sub { |
|
|
751 | my ($self, $cb) = @_; |
|
|
752 | |
|
|
753 | sub { |
|
|
754 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
|
|
755 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
|
|
756 | $! = &Errno::EBADMSG; |
|
|
757 | $self->error; |
|
|
758 | } |
938 | 1 |
759 | return; |
|
|
760 | } |
939 | } |
|
|
940 | } else { |
|
|
941 | $eol = quotemeta $eol unless ref $eol; |
|
|
942 | $eol = qr|^(.*?)($eol)|s; |
761 | |
943 | |
762 | my $len = $1; |
944 | sub { |
|
|
945 | $_[0]{rbuf} =~ s/$eol// or return; |
763 | |
946 | |
764 | $self->unshift_read (chunk => $len, sub { |
947 | $cb->($_[0], $1, $2); |
765 | my $string = $_[1]; |
|
|
766 | $_[0]->unshift_read (chunk => 1, sub { |
|
|
767 | if ($_[1] eq ",") { |
|
|
768 | $cb->($_[0], $string); |
|
|
769 | } else { |
|
|
770 | $! = &Errno::EBADMSG; |
|
|
771 | $self->error; |
|
|
772 | } |
|
|
773 | }); |
948 | 1 |
774 | }); |
949 | } |
775 | |
|
|
776 | 1 |
|
|
777 | } |
950 | } |
778 | }; |
951 | }; |
779 | |
952 | |
780 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
953 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
781 | |
954 | |
… | |
… | |
833 | return 1; |
1006 | return 1; |
834 | } |
1007 | } |
835 | |
1008 | |
836 | # reject |
1009 | # reject |
837 | if ($reject && $$rbuf =~ $reject) { |
1010 | if ($reject && $$rbuf =~ $reject) { |
838 | $! = &Errno::EBADMSG; |
1011 | $self->_error (&Errno::EBADMSG); |
839 | $self->error; |
|
|
840 | } |
1012 | } |
841 | |
1013 | |
842 | # skip |
1014 | # skip |
843 | if ($skip && $$rbuf =~ $skip) { |
1015 | if ($skip && $$rbuf =~ $skip) { |
844 | $data .= substr $$rbuf, 0, $+[0], ""; |
1016 | $data .= substr $$rbuf, 0, $+[0], ""; |
… | |
… | |
846 | |
1018 | |
847 | () |
1019 | () |
848 | } |
1020 | } |
849 | }; |
1021 | }; |
850 | |
1022 | |
|
|
1023 | =item netstring => $cb->($handle, $string) |
|
|
1024 | |
|
|
1025 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
|
|
1026 | |
|
|
1027 | Throws an error with C<$!> set to EBADMSG on format violations. |
|
|
1028 | |
|
|
1029 | =cut |
|
|
1030 | |
|
|
1031 | register_read_type netstring => sub { |
|
|
1032 | my ($self, $cb) = @_; |
|
|
1033 | |
|
|
1034 | sub { |
|
|
1035 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
|
|
1036 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
|
|
1037 | $self->_error (&Errno::EBADMSG); |
|
|
1038 | } |
|
|
1039 | return; |
|
|
1040 | } |
|
|
1041 | |
|
|
1042 | my $len = $1; |
|
|
1043 | |
|
|
1044 | $self->unshift_read (chunk => $len, sub { |
|
|
1045 | my $string = $_[1]; |
|
|
1046 | $_[0]->unshift_read (chunk => 1, sub { |
|
|
1047 | if ($_[1] eq ",") { |
|
|
1048 | $cb->($_[0], $string); |
|
|
1049 | } else { |
|
|
1050 | $self->_error (&Errno::EBADMSG); |
|
|
1051 | } |
|
|
1052 | }); |
|
|
1053 | }); |
|
|
1054 | |
|
|
1055 | 1 |
|
|
1056 | } |
|
|
1057 | }; |
|
|
1058 | |
|
|
1059 | =item packstring => $format, $cb->($handle, $string) |
|
|
1060 | |
|
|
1061 | An octet string prefixed with an encoded length. The encoding C<$format> |
|
|
1062 | uses the same format as a Perl C<pack> format, but must specify a single |
|
|
1063 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
|
|
1064 | optional C<!>, C<< < >> or C<< > >> modifier). |
|
|
1065 | |
|
|
1066 | DNS over TCP uses a prefix of C<n>, EPP uses a prefix of C<N>. |
|
|
1067 | |
|
|
1068 | Example: read a block of data prefixed by its length in BER-encoded |
|
|
1069 | format (very efficient). |
|
|
1070 | |
|
|
1071 | $handle->push_read (packstring => "w", sub { |
|
|
1072 | my ($handle, $data) = @_; |
|
|
1073 | }); |
|
|
1074 | |
|
|
1075 | =cut |
|
|
1076 | |
|
|
1077 | register_read_type packstring => sub { |
|
|
1078 | my ($self, $cb, $format) = @_; |
|
|
1079 | |
|
|
1080 | sub { |
|
|
1081 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
|
|
1082 | defined (my $len = eval { unpack $format, $_[0]{rbuf} }) |
|
|
1083 | or return; |
|
|
1084 | |
|
|
1085 | $format = length pack $format, $len; |
|
|
1086 | |
|
|
1087 | # bypass unshift if we already have the remaining chunk |
|
|
1088 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1089 | my $data = substr $_[0]{rbuf}, $format, $len; |
|
|
1090 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1091 | $cb->($_[0], $data); |
|
|
1092 | } else { |
|
|
1093 | # remove prefix |
|
|
1094 | substr $_[0]{rbuf}, 0, $format, ""; |
|
|
1095 | |
|
|
1096 | # read remaining chunk |
|
|
1097 | $_[0]->unshift_read (chunk => $len, $cb); |
|
|
1098 | } |
|
|
1099 | |
|
|
1100 | 1 |
|
|
1101 | } |
|
|
1102 | }; |
|
|
1103 | |
851 | =item json => $cb->($handle, $hash_or_arrayref) |
1104 | =item json => $cb->($handle, $hash_or_arrayref) |
852 | |
1105 | |
853 | Reads a JSON object or array, decodes it and passes it to the callback. |
1106 | Reads a JSON object or array, decodes it and passes it to the callback. |
854 | |
1107 | |
855 | If a C<json> object was passed to the constructor, then that will be used |
1108 | If a C<json> object was passed to the constructor, then that will be used |
… | |
… | |
859 | 2.09 (and JSON::XS version 2.2) and above. You have to provide a |
1112 | 2.09 (and JSON::XS version 2.2) and above. You have to provide a |
860 | dependency on your own: this module will load the JSON module, but |
1113 | dependency on your own: this module will load the JSON module, but |
861 | AnyEvent does not depend on it itself. |
1114 | AnyEvent does not depend on it itself. |
862 | |
1115 | |
863 | Since JSON texts are fully self-delimiting, the C<json> read and write |
1116 | Since JSON texts are fully self-delimiting, the C<json> read and write |
864 | types are an ideal simple RPC protocol: just exchange JSON datagrams. |
1117 | types are an ideal simple RPC protocol: just exchange JSON datagrams. See |
|
|
1118 | the C<json> write type description, above, for an actual example. |
865 | |
1119 | |
866 | =cut |
1120 | =cut |
867 | |
1121 | |
868 | register_read_type json => sub { |
1122 | register_read_type json => sub { |
869 | my ($self, $cb, $accept, $reject, $skip) = @_; |
1123 | my ($self, $cb) = @_; |
870 | |
1124 | |
871 | require JSON; |
1125 | require JSON; |
872 | |
1126 | |
873 | my $data; |
1127 | my $data; |
874 | my $rbuf = \$self->{rbuf}; |
1128 | my $rbuf = \$self->{rbuf}; |
875 | |
1129 | |
876 | my $json = $self->{json} ||= JSON::XS->new->utf8; |
1130 | my $json = $self->{json} ||= JSON->new->utf8; |
877 | |
1131 | |
878 | sub { |
1132 | sub { |
879 | my $ref = $json->incr_parse ($self->{rbuf}); |
1133 | my $ref = $json->incr_parse ($self->{rbuf}); |
880 | |
1134 | |
881 | if ($ref) { |
1135 | if ($ref) { |
… | |
… | |
889 | () |
1143 | () |
890 | } |
1144 | } |
891 | } |
1145 | } |
892 | }; |
1146 | }; |
893 | |
1147 | |
|
|
1148 | =item storable => $cb->($handle, $ref) |
|
|
1149 | |
|
|
1150 | Deserialises a L<Storable> frozen representation as written by the |
|
|
1151 | C<storable> write type (BER-encoded length prefix followed by nfreeze'd |
|
|
1152 | data). |
|
|
1153 | |
|
|
1154 | Raises C<EBADMSG> error if the data could not be decoded. |
|
|
1155 | |
|
|
1156 | =cut |
|
|
1157 | |
|
|
1158 | register_read_type storable => sub { |
|
|
1159 | my ($self, $cb) = @_; |
|
|
1160 | |
|
|
1161 | require Storable; |
|
|
1162 | |
|
|
1163 | sub { |
|
|
1164 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
|
|
1165 | defined (my $len = eval { unpack "w", $_[0]{rbuf} }) |
|
|
1166 | or return; |
|
|
1167 | |
|
|
1168 | my $format = length pack "w", $len; |
|
|
1169 | |
|
|
1170 | # bypass unshift if we already have the remaining chunk |
|
|
1171 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1172 | my $data = substr $_[0]{rbuf}, $format, $len; |
|
|
1173 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1174 | $cb->($_[0], Storable::thaw ($data)); |
|
|
1175 | } else { |
|
|
1176 | # remove prefix |
|
|
1177 | substr $_[0]{rbuf}, 0, $format, ""; |
|
|
1178 | |
|
|
1179 | # read remaining chunk |
|
|
1180 | $_[0]->unshift_read (chunk => $len, sub { |
|
|
1181 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
|
|
1182 | $cb->($_[0], $ref); |
|
|
1183 | } else { |
|
|
1184 | $self->_error (&Errno::EBADMSG); |
|
|
1185 | } |
|
|
1186 | }); |
|
|
1187 | } |
|
|
1188 | |
|
|
1189 | 1 |
|
|
1190 | } |
|
|
1191 | }; |
|
|
1192 | |
894 | =back |
1193 | =back |
895 | |
1194 | |
896 | =item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args) |
1195 | =item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args) |
897 | |
1196 | |
898 | This function (not method) lets you add your own types to C<push_read>. |
1197 | This function (not method) lets you add your own types to C<push_read>. |
… | |
… | |
916 | =item $handle->stop_read |
1215 | =item $handle->stop_read |
917 | |
1216 | |
918 | =item $handle->start_read |
1217 | =item $handle->start_read |
919 | |
1218 | |
920 | In rare cases you actually do not want to read anything from the |
1219 | In rare cases you actually do not want to read anything from the |
921 | socket. In this case you can call C<stop_read>. Neither C<on_read> no |
1220 | socket. In this case you can call C<stop_read>. Neither C<on_read> nor |
922 | any queued callbacks will be executed then. To start reading again, call |
1221 | any queued callbacks will be executed then. To start reading again, call |
923 | C<start_read>. |
1222 | C<start_read>. |
|
|
1223 | |
|
|
1224 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
|
|
1225 | you change the C<on_read> callback or push/unshift a read callback, and it |
|
|
1226 | will automatically C<stop_read> for you when neither C<on_read> is set nor |
|
|
1227 | there are any read requests in the queue. |
924 | |
1228 | |
925 | =cut |
1229 | =cut |
926 | |
1230 | |
927 | sub stop_read { |
1231 | sub stop_read { |
928 | my ($self) = @_; |
1232 | my ($self) = @_; |
… | |
… | |
939 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
1243 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
940 | my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; |
1244 | my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; |
941 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
1245 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
942 | |
1246 | |
943 | if ($len > 0) { |
1247 | if ($len > 0) { |
|
|
1248 | $self->{_activity} = AnyEvent->now; |
|
|
1249 | |
944 | $self->{filter_r} |
1250 | $self->{filter_r} |
945 | ? $self->{filter_r}->($self, $rbuf) |
1251 | ? $self->{filter_r}($self, $rbuf) |
946 | : $self->_drain_rbuf; |
1252 | : $self->{_in_drain} || $self->_drain_rbuf; |
947 | |
1253 | |
948 | } elsif (defined $len) { |
1254 | } elsif (defined $len) { |
949 | delete $self->{_rw}; |
1255 | delete $self->{_rw}; |
950 | $self->{_eof} = 1; |
1256 | $self->{_eof} = 1; |
951 | $self->_drain_rbuf; |
1257 | $self->_drain_rbuf unless $self->{_in_drain}; |
952 | |
1258 | |
953 | } elsif ($! != EAGAIN && $! != EINTR && $! != &AnyEvent::Util::WSAWOULDBLOCK) { |
1259 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
954 | return $self->error; |
1260 | return $self->_error ($!, 1); |
955 | } |
1261 | } |
956 | }); |
1262 | }); |
957 | } |
1263 | } |
958 | } |
1264 | } |
959 | |
1265 | |
960 | sub _dotls { |
1266 | sub _dotls { |
961 | my ($self) = @_; |
1267 | my ($self) = @_; |
|
|
1268 | |
|
|
1269 | my $buf; |
962 | |
1270 | |
963 | if (length $self->{_tls_wbuf}) { |
1271 | if (length $self->{_tls_wbuf}) { |
964 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1272 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
965 | substr $self->{_tls_wbuf}, 0, $len, ""; |
1273 | substr $self->{_tls_wbuf}, 0, $len, ""; |
966 | } |
1274 | } |
967 | } |
1275 | } |
968 | |
1276 | |
969 | if (defined (my $buf = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1277 | if (length ($buf = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
970 | $self->{wbuf} .= $buf; |
1278 | $self->{wbuf} .= $buf; |
971 | $self->_drain_wbuf; |
1279 | $self->_drain_wbuf; |
972 | } |
1280 | } |
973 | |
1281 | |
974 | while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) { |
1282 | while (defined ($buf = Net::SSLeay::read ($self->{tls}))) { |
|
|
1283 | if (length $buf) { |
975 | $self->{rbuf} .= $buf; |
1284 | $self->{rbuf} .= $buf; |
976 | $self->_drain_rbuf; |
1285 | $self->_drain_rbuf unless $self->{_in_drain}; |
|
|
1286 | } else { |
|
|
1287 | # let's treat SSL-eof as we treat normal EOF |
|
|
1288 | $self->{_eof} = 1; |
|
|
1289 | $self->_shutdown; |
|
|
1290 | return; |
|
|
1291 | } |
977 | } |
1292 | } |
978 | |
1293 | |
979 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
1294 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
980 | |
1295 | |
981 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
1296 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
982 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
1297 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
983 | $self->error; |
1298 | return $self->_error ($!, 1); |
984 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
1299 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
985 | $! = &Errno::EIO; |
1300 | return $self->_error (&Errno::EIO, 1); |
986 | $self->error; |
|
|
987 | } |
1301 | } |
988 | |
1302 | |
989 | # all others are fine for our purposes |
1303 | # all others are fine for our purposes |
990 | } |
1304 | } |
991 | } |
1305 | } |
… | |
… | |
1006 | call and can be used or changed to your liking. Note that the handshake |
1320 | call and can be used or changed to your liking. Note that the handshake |
1007 | might have already started when this function returns. |
1321 | might have already started when this function returns. |
1008 | |
1322 | |
1009 | =cut |
1323 | =cut |
1010 | |
1324 | |
1011 | # TODO: maybe document... |
|
|
1012 | sub starttls { |
1325 | sub starttls { |
1013 | my ($self, $ssl, $ctx) = @_; |
1326 | my ($self, $ssl, $ctx) = @_; |
1014 | |
1327 | |
1015 | $self->stoptls; |
1328 | $self->stoptls; |
1016 | |
1329 | |
… | |
… | |
1069 | |
1382 | |
1070 | sub DESTROY { |
1383 | sub DESTROY { |
1071 | my $self = shift; |
1384 | my $self = shift; |
1072 | |
1385 | |
1073 | $self->stoptls; |
1386 | $self->stoptls; |
|
|
1387 | |
|
|
1388 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
|
|
1389 | |
|
|
1390 | if ($linger && length $self->{wbuf}) { |
|
|
1391 | my $fh = delete $self->{fh}; |
|
|
1392 | my $wbuf = delete $self->{wbuf}; |
|
|
1393 | |
|
|
1394 | my @linger; |
|
|
1395 | |
|
|
1396 | push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub { |
|
|
1397 | my $len = syswrite $fh, $wbuf, length $wbuf; |
|
|
1398 | |
|
|
1399 | if ($len > 0) { |
|
|
1400 | substr $wbuf, 0, $len, ""; |
|
|
1401 | } else { |
|
|
1402 | @linger = (); # end |
|
|
1403 | } |
|
|
1404 | }); |
|
|
1405 | push @linger, AnyEvent->timer (after => $linger, cb => sub { |
|
|
1406 | @linger = (); |
|
|
1407 | }); |
|
|
1408 | } |
1074 | } |
1409 | } |
1075 | |
1410 | |
1076 | =item AnyEvent::Handle::TLS_CTX |
1411 | =item AnyEvent::Handle::TLS_CTX |
1077 | |
1412 | |
1078 | This function creates and returns the Net::SSLeay::CTX object used by |
1413 | This function creates and returns the Net::SSLeay::CTX object used by |
… | |
… | |
1120 | =over 4 |
1455 | =over 4 |
1121 | |
1456 | |
1122 | =item * all constructor arguments become object members. |
1457 | =item * all constructor arguments become object members. |
1123 | |
1458 | |
1124 | At least initially, when you pass a C<tls>-argument to the constructor it |
1459 | At least initially, when you pass a C<tls>-argument to the constructor it |
1125 | will end up in C<< $handle->{tls} >>. Those members might be changes or |
1460 | will end up in C<< $handle->{tls} >>. Those members might be changed or |
1126 | mutated later on (for example C<tls> will hold the TLS connection object). |
1461 | mutated later on (for example C<tls> will hold the TLS connection object). |
1127 | |
1462 | |
1128 | =item * other object member names are prefixed with an C<_>. |
1463 | =item * other object member names are prefixed with an C<_>. |
1129 | |
1464 | |
1130 | All object members not explicitly documented (internal use) are prefixed |
1465 | All object members not explicitly documented (internal use) are prefixed |