… | |
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2 | |
2 | |
3 | no warnings; |
3 | no warnings; |
4 | use strict; |
4 | use strict; |
5 | |
5 | |
6 | use AnyEvent (); |
6 | use AnyEvent (); |
7 | use AnyEvent::Util (); |
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 | This module is experimental. |
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18 | |
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19 | =cut |
17 | =cut |
20 | |
18 | |
21 | our $VERSION = '0.04'; |
19 | our $VERSION = 4.13; |
22 | |
20 | |
23 | =head1 SYNOPSIS |
21 | =head1 SYNOPSIS |
24 | |
22 | |
25 | use AnyEvent; |
23 | use AnyEvent; |
26 | use AnyEvent::Handle; |
24 | use AnyEvent::Handle; |
27 | |
25 | |
28 | my $cv = AnyEvent->condvar; |
26 | my $cv = AnyEvent->condvar; |
29 | |
27 | |
30 | my $ae_fh = AnyEvent::Handle->new (fh => \*STDIN); |
28 | my $handle = |
31 | |
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32 | #TODO |
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33 | |
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34 | # or use the constructor to pass the callback: |
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35 | |
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36 | my $ae_fh2 = |
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37 | AnyEvent::Handle->new ( |
29 | AnyEvent::Handle->new ( |
38 | fh => \*STDIN, |
30 | fh => \*STDIN, |
39 | on_eof => sub { |
31 | on_eof => sub { |
40 | $cv->broadcast; |
32 | $cv->broadcast; |
41 | }, |
33 | }, |
42 | #TODO |
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43 | ); |
34 | ); |
44 | |
35 | |
45 | $cv->wait; |
36 | # send some request line |
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37 | $handle->push_write ("getinfo\015\012"); |
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38 | |
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39 | # read the response line |
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40 | $handle->push_read (line => sub { |
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41 | my ($handle, $line) = @_; |
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42 | warn "read line <$line>\n"; |
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43 | $cv->send; |
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44 | }); |
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45 | |
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46 | $cv->recv; |
46 | |
47 | |
47 | =head1 DESCRIPTION |
48 | =head1 DESCRIPTION |
48 | |
49 | |
49 | 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 |
50 | filehandles. For utility functions for doing non-blocking connects and accepts |
51 | filehandles. For utility functions for doing non-blocking connects and accepts |
… | |
… | |
72 | The filehandle this L<AnyEvent::Handle> object will operate on. |
73 | The filehandle this L<AnyEvent::Handle> object will operate on. |
73 | |
74 | |
74 | NOTE: The filehandle will be set to non-blocking (using |
75 | NOTE: The filehandle will be set to non-blocking (using |
75 | AnyEvent::Util::fh_nonblocking). |
76 | AnyEvent::Util::fh_nonblocking). |
76 | |
77 | |
77 | =item on_eof => $cb->($self) |
78 | =item on_eof => $cb->($handle) |
78 | |
79 | |
79 | Set the callback to be called on EOF. |
80 | Set the callback to be called when an end-of-file condition is detcted, |
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81 | i.e. in the case of a socket, when the other side has closed the |
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82 | connection cleanly. |
80 | |
83 | |
81 | 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, |
82 | 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 |
83 | waiting for data. |
86 | waiting for data. |
84 | |
87 | |
85 | =item on_error => $cb->($self) |
88 | =item on_error => $cb->($handle, $fatal) |
86 | |
89 | |
87 | This is the fatal error callback, that is called when, well, a fatal error |
90 | This is the error callback, which is called when, well, some error |
88 | occurs, such as not being able to resolve the hostname, failure to connect |
91 | occured, such as not being able to resolve the hostname, failure to |
89 | or a read error. |
92 | connect or a read error. |
90 | |
93 | |
91 | The object will not be in a usable state when this callback has been |
94 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
92 | 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. |
93 | |
99 | |
94 | On callback entrance, the value of C<$!> contains the operating system |
100 | On callback entrance, the value of C<$!> contains the operating system |
95 | error (or C<ENOSPC>, C<EPIPE> or C<EBADMSG>). |
101 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
96 | |
102 | |
97 | 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 |
98 | 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 |
99 | die. |
105 | C<croak>. |
100 | |
106 | |
101 | =item on_read => $cb->($self) |
107 | =item on_read => $cb->($handle) |
102 | |
108 | |
103 | 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 |
104 | and no read request is in the queue. |
110 | and no read request is in the queue. |
105 | |
111 | |
106 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
112 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
107 | method or access the C<$self->{rbuf}> member directly. |
113 | method or access the C<$handle->{rbuf}> member directly. |
108 | |
114 | |
109 | When an EOF condition is detected then AnyEvent::Handle will first try to |
115 | When an EOF condition is detected then AnyEvent::Handle will first try to |
110 | feed all the remaining data to the queued callbacks and C<on_read> before |
116 | feed all the remaining data to the queued callbacks and C<on_read> before |
111 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
117 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
112 | error will be raised (with C<$!> set to C<EPIPE>). |
118 | error will be raised (with C<$!> set to C<EPIPE>). |
113 | |
119 | |
114 | =item on_drain => $cb->() |
120 | =item on_drain => $cb->($handle) |
115 | |
121 | |
116 | This sets the callback that is called when the write buffer becomes empty |
122 | This sets the callback that is called when the write buffer becomes empty |
117 | (or when the callback is set and the buffer is empty already). |
123 | (or when the callback is set and the buffer is empty already). |
118 | |
124 | |
119 | To append to the write buffer, use the C<< ->push_write >> method. |
125 | To append to the write buffer, use the C<< ->push_write >> method. |
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126 | |
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127 | =item timeout => $fractional_seconds |
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128 | |
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129 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
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130 | seconds pass without a successful read or write on the underlying file |
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131 | handle, the C<on_timeout> callback will be invoked (and if that one is |
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132 | missing, an C<ETIMEDOUT> error will be raised). |
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133 | |
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134 | Note that timeout processing is also active when you currently do not have |
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135 | any outstanding read or write requests: If you plan to keep the connection |
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136 | idle then you should disable the timout temporarily or ignore the timeout |
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137 | in the C<on_timeout> callback. |
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138 | |
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139 | Zero (the default) disables this timeout. |
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140 | |
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141 | =item on_timeout => $cb->($handle) |
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142 | |
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143 | Called whenever the inactivity timeout passes. If you return from this |
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144 | callback, then the timeout will be reset as if some activity had happened, |
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145 | so this condition is not fatal in any way. |
120 | |
146 | |
121 | =item rbuf_max => <bytes> |
147 | =item rbuf_max => <bytes> |
122 | |
148 | |
123 | If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>) |
149 | If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>) |
124 | when the read buffer ever (strictly) exceeds this size. This is useful to |
150 | when the read buffer ever (strictly) exceeds this size. This is useful to |
… | |
… | |
131 | isn't finished). |
157 | isn't finished). |
132 | |
158 | |
133 | =item read_size => <bytes> |
159 | =item read_size => <bytes> |
134 | |
160 | |
135 | The default read block size (the amount of bytes this module will try to read |
161 | The default read block size (the amount of bytes this module will try to read |
136 | on each [loop iteration). Default: C<4096>. |
162 | during each (loop iteration). Default: C<8192>. |
137 | |
163 | |
138 | =item low_water_mark => <bytes> |
164 | =item low_water_mark => <bytes> |
139 | |
165 | |
140 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
166 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
141 | buffer: If the write reaches this size or gets even samller it is |
167 | buffer: If the write reaches this size or gets even samller it is |
… | |
… | |
164 | |
190 | |
165 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
191 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
166 | (unless a connection object was specified directly). If this parameter is |
192 | (unless a connection object was specified directly). If this parameter is |
167 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
193 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
168 | |
194 | |
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195 | =item json => JSON or JSON::XS object |
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196 | |
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197 | This is the json coder object used by the C<json> read and write types. |
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198 | |
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199 | If you don't supply it, then AnyEvent::Handle will create and use a |
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200 | suitable one, which will write and expect UTF-8 encoded JSON texts. |
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201 | |
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202 | Note that you are responsible to depend on the JSON module if you want to |
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203 | use this functionality, as AnyEvent does not have a dependency itself. |
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204 | |
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205 | =item filter_r => $cb |
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206 | |
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207 | =item filter_w => $cb |
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208 | |
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209 | These exist, but are undocumented at this time. |
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210 | |
169 | =back |
211 | =back |
170 | |
212 | |
171 | =cut |
213 | =cut |
172 | |
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173 | our (%RH, %WH); |
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174 | |
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175 | sub register_read_type($$) { |
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176 | $RH{$_[0]} = $_[1]; |
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177 | } |
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178 | |
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179 | sub register_write_type($$) { |
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180 | $WH{$_[0]} = $_[1]; |
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181 | } |
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182 | |
214 | |
183 | sub new { |
215 | sub new { |
184 | my $class = shift; |
216 | my $class = shift; |
185 | |
217 | |
186 | my $self = bless { @_ }, $class; |
218 | my $self = bless { @_ }, $class; |
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192 | if ($self->{tls}) { |
224 | if ($self->{tls}) { |
193 | require Net::SSLeay; |
225 | require Net::SSLeay; |
194 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
226 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
195 | } |
227 | } |
196 | |
228 | |
197 | $self->on_eof (delete $self->{on_eof} ) if $self->{on_eof}; |
229 | $self->{_activity} = AnyEvent->now; |
198 | $self->on_error (delete $self->{on_error}) if $self->{on_error}; |
230 | $self->_timeout; |
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231 | |
199 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
232 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
200 | $self->on_read (delete $self->{on_read} ) if $self->{on_read}; |
233 | $self->on_read (delete $self->{on_read} ) if $self->{on_read}; |
201 | |
234 | |
202 | $self->start_read; |
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203 | |
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204 | $self |
235 | $self |
205 | } |
236 | } |
206 | |
237 | |
207 | sub _shutdown { |
238 | sub _shutdown { |
208 | my ($self) = @_; |
239 | my ($self) = @_; |
209 | |
240 | |
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241 | delete $self->{_tw}; |
210 | delete $self->{rw}; |
242 | delete $self->{_rw}; |
211 | delete $self->{ww}; |
243 | delete $self->{_ww}; |
212 | delete $self->{fh}; |
244 | delete $self->{fh}; |
213 | } |
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214 | |
245 | |
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246 | $self->stoptls; |
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247 | } |
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248 | |
215 | sub error { |
249 | sub _error { |
216 | my ($self) = @_; |
250 | my ($self, $errno, $fatal) = @_; |
217 | |
251 | |
218 | { |
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219 | local $!; |
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220 | $self->_shutdown; |
252 | $self->_shutdown |
221 | } |
253 | if $fatal; |
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254 | |
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255 | $! = $errno; |
222 | |
256 | |
223 | if ($self->{on_error}) { |
257 | if ($self->{on_error}) { |
224 | $self->{on_error}($self); |
258 | $self->{on_error}($self, $fatal); |
225 | } else { |
259 | } else { |
226 | Carp::croak "AnyEvent::Handle uncaught fatal error: $!"; |
260 | Carp::croak "AnyEvent::Handle uncaught error: $!"; |
227 | } |
261 | } |
228 | } |
262 | } |
229 | |
263 | |
230 | =item $fh = $handle->fh |
264 | =item $fh = $handle->fh |
231 | |
265 | |
232 | This method returns the file handle of the L<AnyEvent::Handle> object. |
266 | This method returns the file handle of the L<AnyEvent::Handle> object. |
233 | |
267 | |
234 | =cut |
268 | =cut |
235 | |
269 | |
236 | sub fh { $_[0]->{fh} } |
270 | sub fh { $_[0]{fh} } |
237 | |
271 | |
238 | =item $handle->on_error ($cb) |
272 | =item $handle->on_error ($cb) |
239 | |
273 | |
240 | Replace the current C<on_error> callback (see the C<on_error> constructor argument). |
274 | Replace the current C<on_error> callback (see the C<on_error> constructor argument). |
241 | |
275 | |
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251 | |
285 | |
252 | =cut |
286 | =cut |
253 | |
287 | |
254 | sub on_eof { |
288 | sub on_eof { |
255 | $_[0]{on_eof} = $_[1]; |
289 | $_[0]{on_eof} = $_[1]; |
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290 | } |
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291 | |
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292 | =item $handle->on_timeout ($cb) |
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293 | |
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294 | Replace the current C<on_timeout> callback, or disables the callback |
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295 | (but not the timeout) if C<$cb> = C<undef>. See C<timeout> constructor |
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296 | argument. |
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297 | |
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298 | =cut |
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299 | |
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300 | sub on_timeout { |
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301 | $_[0]{on_timeout} = $_[1]; |
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302 | } |
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303 | |
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304 | ############################################################################# |
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305 | |
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306 | =item $handle->timeout ($seconds) |
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307 | |
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308 | Configures (or disables) the inactivity timeout. |
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309 | |
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310 | =cut |
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311 | |
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312 | sub timeout { |
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313 | my ($self, $timeout) = @_; |
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314 | |
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315 | $self->{timeout} = $timeout; |
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316 | $self->_timeout; |
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317 | } |
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318 | |
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319 | # reset the timeout watcher, as neccessary |
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320 | # also check for time-outs |
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321 | sub _timeout { |
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322 | my ($self) = @_; |
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323 | |
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324 | if ($self->{timeout}) { |
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325 | my $NOW = AnyEvent->now; |
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326 | |
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327 | # when would the timeout trigger? |
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328 | my $after = $self->{_activity} + $self->{timeout} - $NOW; |
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329 | |
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330 | # now or in the past already? |
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331 | if ($after <= 0) { |
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332 | $self->{_activity} = $NOW; |
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333 | |
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334 | if ($self->{on_timeout}) { |
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335 | $self->{on_timeout}($self); |
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336 | } else { |
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337 | $self->_error (&Errno::ETIMEDOUT); |
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338 | } |
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339 | |
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340 | # callback could have changed timeout value, optimise |
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341 | return unless $self->{timeout}; |
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342 | |
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343 | # calculate new after |
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344 | $after = $self->{timeout}; |
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345 | } |
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346 | |
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347 | Scalar::Util::weaken $self; |
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348 | return unless $self; # ->error could have destroyed $self |
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349 | |
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350 | $self->{_tw} ||= AnyEvent->timer (after => $after, cb => sub { |
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351 | delete $self->{_tw}; |
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352 | $self->_timeout; |
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353 | }); |
|
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354 | } else { |
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355 | delete $self->{_tw}; |
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356 | } |
256 | } |
357 | } |
257 | |
358 | |
258 | ############################################################################# |
359 | ############################################################################# |
259 | |
360 | |
260 | =back |
361 | =back |
… | |
… | |
297 | =cut |
398 | =cut |
298 | |
399 | |
299 | sub _drain_wbuf { |
400 | sub _drain_wbuf { |
300 | my ($self) = @_; |
401 | my ($self) = @_; |
301 | |
402 | |
302 | if (!$self->{ww} && length $self->{wbuf}) { |
403 | if (!$self->{_ww} && length $self->{wbuf}) { |
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404 | |
303 | Scalar::Util::weaken $self; |
405 | Scalar::Util::weaken $self; |
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406 | |
304 | my $cb = sub { |
407 | my $cb = sub { |
305 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
408 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
306 | |
409 | |
307 | if ($len >= 0) { |
410 | if ($len >= 0) { |
308 | substr $self->{wbuf}, 0, $len, ""; |
411 | substr $self->{wbuf}, 0, $len, ""; |
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412 | |
|
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413 | $self->{_activity} = AnyEvent->now; |
309 | |
414 | |
310 | $self->{on_drain}($self) |
415 | $self->{on_drain}($self) |
311 | if $self->{low_water_mark} >= length $self->{wbuf} |
416 | if $self->{low_water_mark} >= length $self->{wbuf} |
312 | && $self->{on_drain}; |
417 | && $self->{on_drain}; |
313 | |
418 | |
314 | delete $self->{ww} unless length $self->{wbuf}; |
419 | delete $self->{_ww} unless length $self->{wbuf}; |
315 | } elsif ($! != EAGAIN && $! != EINTR) { |
420 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
316 | $self->error; |
421 | $self->_error ($!, 1); |
317 | } |
422 | } |
318 | }; |
423 | }; |
319 | |
424 | |
|
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425 | # try to write data immediately |
|
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426 | $cb->(); |
|
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427 | |
|
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428 | # if still data left in wbuf, we need to poll |
320 | $self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb); |
429 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
321 | |
430 | if length $self->{wbuf}; |
322 | $cb->($self); |
|
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323 | }; |
431 | }; |
|
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432 | } |
|
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433 | |
|
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434 | our %WH; |
|
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435 | |
|
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436 | sub register_write_type($$) { |
|
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437 | $WH{$_[0]} = $_[1]; |
324 | } |
438 | } |
325 | |
439 | |
326 | sub push_write { |
440 | sub push_write { |
327 | my $self = shift; |
441 | my $self = shift; |
328 | |
442 | |
… | |
… | |
332 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
446 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
333 | ->($self, @_); |
447 | ->($self, @_); |
334 | } |
448 | } |
335 | |
449 | |
336 | if ($self->{filter_w}) { |
450 | if ($self->{filter_w}) { |
337 | $self->{filter_w}->($self, \$_[0]); |
451 | $self->{filter_w}($self, \$_[0]); |
338 | } else { |
452 | } else { |
339 | $self->{wbuf} .= $_[0]; |
453 | $self->{wbuf} .= $_[0]; |
340 | $self->_drain_wbuf; |
454 | $self->_drain_wbuf; |
341 | } |
455 | } |
342 | } |
456 | } |
343 | |
457 | |
344 | =item $handle->push_write (type => @args) |
458 | =item $handle->push_write (type => @args) |
345 | |
459 | |
346 | =item $handle->unshift_write (type => @args) |
|
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347 | |
|
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348 | Instead of formatting your data yourself, you can also let this module do |
460 | Instead of formatting your data yourself, you can also let this module do |
349 | the job by specifying a type and type-specific arguments. |
461 | the job by specifying a type and type-specific arguments. |
350 | |
462 | |
351 | Predefined types are: |
463 | Predefined types are (if you have ideas for additional types, feel free to |
|
|
464 | drop by and tell us): |
352 | |
465 | |
353 | =over 4 |
466 | =over 4 |
354 | |
467 | |
355 | =item netstring => $string |
468 | =item netstring => $string |
356 | |
469 | |
… | |
… | |
363 | my ($self, $string) = @_; |
476 | my ($self, $string) = @_; |
364 | |
477 | |
365 | sprintf "%d:%s,", (length $string), $string |
478 | sprintf "%d:%s,", (length $string), $string |
366 | }; |
479 | }; |
367 | |
480 | |
|
|
481 | =item json => $array_or_hashref |
|
|
482 | |
|
|
483 | Encodes the given hash or array reference into a JSON object. Unless you |
|
|
484 | provide your own JSON object, this means it will be encoded to JSON text |
|
|
485 | in UTF-8. |
|
|
486 | |
|
|
487 | JSON objects (and arrays) are self-delimiting, so you can write JSON at |
|
|
488 | one end of a handle and read them at the other end without using any |
|
|
489 | additional framing. |
|
|
490 | |
|
|
491 | The generated JSON text is guaranteed not to contain any newlines: While |
|
|
492 | this module doesn't need delimiters after or between JSON texts to be |
|
|
493 | able to read them, many other languages depend on that. |
|
|
494 | |
|
|
495 | A simple RPC protocol that interoperates easily with others is to send |
|
|
496 | JSON arrays (or objects, although arrays are usually the better choice as |
|
|
497 | they mimic how function argument passing works) and a newline after each |
|
|
498 | JSON text: |
|
|
499 | |
|
|
500 | $handle->push_write (json => ["method", "arg1", "arg2"]); # whatever |
|
|
501 | $handle->push_write ("\012"); |
|
|
502 | |
|
|
503 | An AnyEvent::Handle receiver would simply use the C<json> read type and |
|
|
504 | rely on the fact that the newline will be skipped as leading whitespace: |
|
|
505 | |
|
|
506 | $handle->push_read (json => sub { my $array = $_[1]; ... }); |
|
|
507 | |
|
|
508 | Other languages could read single lines terminated by a newline and pass |
|
|
509 | this line into their JSON decoder of choice. |
|
|
510 | |
|
|
511 | =cut |
|
|
512 | |
|
|
513 | register_write_type json => sub { |
|
|
514 | my ($self, $ref) = @_; |
|
|
515 | |
|
|
516 | require JSON; |
|
|
517 | |
|
|
518 | $self->{json} ? $self->{json}->encode ($ref) |
|
|
519 | : JSON::encode_json ($ref) |
|
|
520 | }; |
|
|
521 | |
368 | =back |
522 | =back |
369 | |
523 | |
370 | =cut |
524 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
371 | |
525 | |
|
|
526 | This function (not method) lets you add your own types to C<push_write>. |
|
|
527 | Whenever the given C<type> is used, C<push_write> will invoke the code |
|
|
528 | reference with the handle object and the remaining arguments. |
372 | |
529 | |
|
|
530 | The code reference is supposed to return a single octet string that will |
|
|
531 | be appended to the write buffer. |
|
|
532 | |
|
|
533 | Note that this is a function, and all types registered this way will be |
|
|
534 | global, so try to use unique names. |
|
|
535 | |
|
|
536 | =cut |
373 | |
537 | |
374 | ############################################################################# |
538 | ############################################################################# |
375 | |
539 | |
376 | =back |
540 | =back |
377 | |
541 | |
… | |
… | |
401 | the specified number of bytes which give an XML datagram. |
565 | the specified number of bytes which give an XML datagram. |
402 | |
566 | |
403 | # in the default state, expect some header bytes |
567 | # in the default state, expect some header bytes |
404 | $handle->on_read (sub { |
568 | $handle->on_read (sub { |
405 | # some data is here, now queue the length-header-read (4 octets) |
569 | # some data is here, now queue the length-header-read (4 octets) |
406 | shift->unshift_read_chunk (4, sub { |
570 | shift->unshift_read (chunk => 4, sub { |
407 | # header arrived, decode |
571 | # header arrived, decode |
408 | my $len = unpack "N", $_[1]; |
572 | my $len = unpack "N", $_[1]; |
409 | |
573 | |
410 | # now read the payload |
574 | # now read the payload |
411 | shift->unshift_read_chunk ($len, sub { |
575 | shift->unshift_read (chunk => $len, sub { |
412 | my $xml = $_[1]; |
576 | my $xml = $_[1]; |
413 | # handle xml |
577 | # handle xml |
414 | }); |
578 | }); |
415 | }); |
579 | }); |
416 | }); |
580 | }); |
… | |
… | |
423 | |
587 | |
424 | # request one |
588 | # request one |
425 | $handle->push_write ("request 1\015\012"); |
589 | $handle->push_write ("request 1\015\012"); |
426 | |
590 | |
427 | # we expect "ERROR" or "OK" as response, so push a line read |
591 | # we expect "ERROR" or "OK" as response, so push a line read |
428 | $handle->push_read_line (sub { |
592 | $handle->push_read (line => sub { |
429 | # if we got an "OK", we have to _prepend_ another line, |
593 | # if we got an "OK", we have to _prepend_ another line, |
430 | # so it will be read before the second request reads its 64 bytes |
594 | # so it will be read before the second request reads its 64 bytes |
431 | # which are already in the queue when this callback is called |
595 | # which are already in the queue when this callback is called |
432 | # we don't do this in case we got an error |
596 | # we don't do this in case we got an error |
433 | if ($_[1] eq "OK") { |
597 | if ($_[1] eq "OK") { |
434 | $_[0]->unshift_read_line (sub { |
598 | $_[0]->unshift_read (line => sub { |
435 | my $response = $_[1]; |
599 | my $response = $_[1]; |
436 | ... |
600 | ... |
437 | }); |
601 | }); |
438 | } |
602 | } |
439 | }); |
603 | }); |
440 | |
604 | |
441 | # request two |
605 | # request two |
442 | $handle->push_write ("request 2\015\012"); |
606 | $handle->push_write ("request 2\015\012"); |
443 | |
607 | |
444 | # simply read 64 bytes, always |
608 | # simply read 64 bytes, always |
445 | $handle->push_read_chunk (64, sub { |
609 | $handle->push_read (chunk => 64, sub { |
446 | my $response = $_[1]; |
610 | my $response = $_[1]; |
447 | ... |
611 | ... |
448 | }); |
612 | }); |
449 | |
613 | |
450 | =over 4 |
614 | =over 4 |
… | |
… | |
456 | |
620 | |
457 | if ( |
621 | if ( |
458 | defined $self->{rbuf_max} |
622 | defined $self->{rbuf_max} |
459 | && $self->{rbuf_max} < length $self->{rbuf} |
623 | && $self->{rbuf_max} < length $self->{rbuf} |
460 | ) { |
624 | ) { |
461 | $! = &Errno::ENOSPC; return $self->error; |
625 | return $self->_error (&Errno::ENOSPC, 1); |
462 | } |
626 | } |
463 | |
627 | |
464 | return if $self->{in_drain}; |
628 | return if $self->{in_drain}; |
465 | local $self->{in_drain} = 1; |
629 | local $self->{in_drain} = 1; |
466 | |
630 | |
467 | while (my $len = length $self->{rbuf}) { |
631 | while (my $len = length $self->{rbuf}) { |
468 | no strict 'refs'; |
632 | no strict 'refs'; |
469 | if (my $cb = shift @{ $self->{queue} }) { |
633 | if (my $cb = shift @{ $self->{_queue} }) { |
470 | unless ($cb->($self)) { |
634 | unless ($cb->($self)) { |
471 | if ($self->{eof}) { |
635 | if ($self->{_eof}) { |
472 | # no progress can be made (not enough data and no data forthcoming) |
636 | # no progress can be made (not enough data and no data forthcoming) |
473 | $! = &Errno::EPIPE; return $self->error; |
637 | return $self->_error (&Errno::EPIPE, 1); |
474 | } |
638 | } |
475 | |
639 | |
476 | unshift @{ $self->{queue} }, $cb; |
640 | unshift @{ $self->{_queue} }, $cb; |
477 | return; |
641 | last; |
478 | } |
642 | } |
479 | } elsif ($self->{on_read}) { |
643 | } elsif ($self->{on_read}) { |
480 | $self->{on_read}($self); |
644 | $self->{on_read}($self); |
481 | |
645 | |
482 | if ( |
646 | if ( |
483 | $self->{eof} # if no further data will arrive |
|
|
484 | && $len == length $self->{rbuf} # and no data has been consumed |
647 | $len == length $self->{rbuf} # if no data has been consumed |
485 | && !@{ $self->{queue} } # and the queue is still empty |
648 | && !@{ $self->{_queue} } # and the queue is still empty |
486 | && $self->{on_read} # and we still want to read data |
649 | && $self->{on_read} # but we still have on_read |
487 | ) { |
650 | ) { |
|
|
651 | # no further data will arrive |
488 | # then no progress can be made |
652 | # so no progress can be made |
489 | $! = &Errno::EPIPE; return $self->error; |
653 | return $self->_error (&Errno::EPIPE, 1) |
|
|
654 | if $self->{_eof}; |
|
|
655 | |
|
|
656 | last; # more data might arrive |
490 | } |
657 | } |
491 | } else { |
658 | } else { |
492 | # read side becomes idle |
659 | # read side becomes idle |
493 | delete $self->{rw}; |
660 | delete $self->{_rw}; |
494 | return; |
661 | last; |
495 | } |
662 | } |
496 | } |
663 | } |
497 | |
664 | |
498 | if ($self->{eof}) { |
|
|
499 | $self->_shutdown; |
|
|
500 | $self->{on_eof}($self) |
665 | $self->{on_eof}($self) |
501 | if $self->{on_eof}; |
666 | if $self->{_eof} && $self->{on_eof}; |
|
|
667 | |
|
|
668 | # may need to restart read watcher |
|
|
669 | unless ($self->{_rw}) { |
|
|
670 | $self->start_read |
|
|
671 | if $self->{on_read} || @{ $self->{_queue} }; |
502 | } |
672 | } |
503 | } |
673 | } |
504 | |
674 | |
505 | =item $handle->on_read ($cb) |
675 | =item $handle->on_read ($cb) |
506 | |
676 | |
… | |
… | |
512 | |
682 | |
513 | sub on_read { |
683 | sub on_read { |
514 | my ($self, $cb) = @_; |
684 | my ($self, $cb) = @_; |
515 | |
685 | |
516 | $self->{on_read} = $cb; |
686 | $self->{on_read} = $cb; |
|
|
687 | $self->_drain_rbuf if $cb; |
517 | } |
688 | } |
518 | |
689 | |
519 | =item $handle->rbuf |
690 | =item $handle->rbuf |
520 | |
691 | |
521 | Returns the read buffer (as a modifiable lvalue). |
692 | Returns the read buffer (as a modifiable lvalue). |
… | |
… | |
552 | interested in (which can be none at all) and return a true value. After returning |
723 | interested in (which can be none at all) and return a true value. After returning |
553 | true, it will be removed from the queue. |
724 | true, it will be removed from the queue. |
554 | |
725 | |
555 | =cut |
726 | =cut |
556 | |
727 | |
|
|
728 | our %RH; |
|
|
729 | |
|
|
730 | sub register_read_type($$) { |
|
|
731 | $RH{$_[0]} = $_[1]; |
|
|
732 | } |
|
|
733 | |
557 | sub push_read { |
734 | sub push_read { |
558 | my $self = shift; |
735 | my $self = shift; |
559 | my $cb = pop; |
736 | my $cb = pop; |
560 | |
737 | |
561 | if (@_) { |
738 | if (@_) { |
… | |
… | |
563 | |
740 | |
564 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
741 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
565 | ->($self, $cb, @_); |
742 | ->($self, $cb, @_); |
566 | } |
743 | } |
567 | |
744 | |
568 | push @{ $self->{queue} }, $cb; |
745 | push @{ $self->{_queue} }, $cb; |
569 | $self->_drain_rbuf; |
746 | $self->_drain_rbuf; |
570 | } |
747 | } |
571 | |
748 | |
572 | sub unshift_read { |
749 | sub unshift_read { |
573 | my $self = shift; |
750 | my $self = shift; |
… | |
… | |
579 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read") |
756 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read") |
580 | ->($self, $cb, @_); |
757 | ->($self, $cb, @_); |
581 | } |
758 | } |
582 | |
759 | |
583 | |
760 | |
584 | unshift @{ $self->{queue} }, $cb; |
761 | unshift @{ $self->{_queue} }, $cb; |
585 | $self->_drain_rbuf; |
762 | $self->_drain_rbuf; |
586 | } |
763 | } |
587 | |
764 | |
588 | =item $handle->push_read (type => @args, $cb) |
765 | =item $handle->push_read (type => @args, $cb) |
589 | |
766 | |
… | |
… | |
591 | |
768 | |
592 | Instead of providing a callback that parses the data itself you can chose |
769 | Instead of providing a callback that parses the data itself you can chose |
593 | between a number of predefined parsing formats, for chunks of data, lines |
770 | between a number of predefined parsing formats, for chunks of data, lines |
594 | etc. |
771 | etc. |
595 | |
772 | |
596 | The types currently supported are: |
773 | Predefined types are (if you have ideas for additional types, feel free to |
|
|
774 | drop by and tell us): |
597 | |
775 | |
598 | =over 4 |
776 | =over 4 |
599 | |
777 | |
600 | =item chunk => $octets, $cb->($self, $data) |
778 | =item chunk => $octets, $cb->($handle, $data) |
601 | |
779 | |
602 | Invoke the callback only once C<$octets> bytes have been read. Pass the |
780 | Invoke the callback only once C<$octets> bytes have been read. Pass the |
603 | data read to the callback. The callback will never be called with less |
781 | data read to the callback. The callback will never be called with less |
604 | data. |
782 | data. |
605 | |
783 | |
… | |
… | |
628 | |
806 | |
629 | sub unshift_read_chunk { |
807 | sub unshift_read_chunk { |
630 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
808 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
631 | } |
809 | } |
632 | |
810 | |
633 | =item line => [$eol, ]$cb->($self, $line, $eol) |
811 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
634 | |
812 | |
635 | The callback will be called only once a full line (including the end of |
813 | The callback will be called only once a full line (including the end of |
636 | line marker, C<$eol>) has been read. This line (excluding the end of line |
814 | line marker, C<$eol>) has been read. This line (excluding the end of line |
637 | marker) will be passed to the callback as second argument (C<$line>), and |
815 | marker) will be passed to the callback as second argument (C<$line>), and |
638 | the end of line marker as the third argument (C<$eol>). |
816 | the end of line marker as the third argument (C<$eol>). |
… | |
… | |
675 | sub unshift_read_line { |
853 | sub unshift_read_line { |
676 | my $self = shift; |
854 | my $self = shift; |
677 | $self->unshift_read (line => @_); |
855 | $self->unshift_read (line => @_); |
678 | } |
856 | } |
679 | |
857 | |
680 | =item netstring => $cb->($string) |
858 | =item netstring => $cb->($handle, $string) |
681 | |
859 | |
682 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
860 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
683 | |
861 | |
684 | Throws an error with C<$!> set to EBADMSG on format violations. |
862 | Throws an error with C<$!> set to EBADMSG on format violations. |
685 | |
863 | |
… | |
… | |
689 | my ($self, $cb) = @_; |
867 | my ($self, $cb) = @_; |
690 | |
868 | |
691 | sub { |
869 | sub { |
692 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
870 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
693 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
871 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
694 | $! = &Errno::EBADMSG; |
872 | $self->_error (&Errno::EBADMSG); |
695 | $self->error; |
|
|
696 | } |
873 | } |
697 | return; |
874 | return; |
698 | } |
875 | } |
699 | |
876 | |
700 | my $len = $1; |
877 | my $len = $1; |
… | |
… | |
703 | my $string = $_[1]; |
880 | my $string = $_[1]; |
704 | $_[0]->unshift_read (chunk => 1, sub { |
881 | $_[0]->unshift_read (chunk => 1, sub { |
705 | if ($_[1] eq ",") { |
882 | if ($_[1] eq ",") { |
706 | $cb->($_[0], $string); |
883 | $cb->($_[0], $string); |
707 | } else { |
884 | } else { |
708 | $! = &Errno::EBADMSG; |
885 | $self->_error (&Errno::EBADMSG); |
709 | $self->error; |
|
|
710 | } |
886 | } |
711 | }); |
887 | }); |
712 | }); |
888 | }); |
713 | |
889 | |
714 | 1 |
890 | 1 |
715 | } |
891 | } |
716 | }; |
892 | }; |
717 | |
893 | |
|
|
894 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
|
|
895 | |
|
|
896 | Makes a regex match against the regex object C<$accept> and returns |
|
|
897 | everything up to and including the match. |
|
|
898 | |
|
|
899 | Example: read a single line terminated by '\n'. |
|
|
900 | |
|
|
901 | $handle->push_read (regex => qr<\n>, sub { ... }); |
|
|
902 | |
|
|
903 | If C<$reject> is given and not undef, then it determines when the data is |
|
|
904 | to be rejected: it is matched against the data when the C<$accept> regex |
|
|
905 | does not match and generates an C<EBADMSG> error when it matches. This is |
|
|
906 | useful to quickly reject wrong data (to avoid waiting for a timeout or a |
|
|
907 | receive buffer overflow). |
|
|
908 | |
|
|
909 | Example: expect a single decimal number followed by whitespace, reject |
|
|
910 | anything else (not the use of an anchor). |
|
|
911 | |
|
|
912 | $handle->push_read (regex => qr<^[0-9]+\s>, qr<[^0-9]>, sub { ... }); |
|
|
913 | |
|
|
914 | If C<$skip> is given and not C<undef>, then it will be matched against |
|
|
915 | the receive buffer when neither C<$accept> nor C<$reject> match, |
|
|
916 | and everything preceding and including the match will be accepted |
|
|
917 | unconditionally. This is useful to skip large amounts of data that you |
|
|
918 | know cannot be matched, so that the C<$accept> or C<$reject> regex do not |
|
|
919 | have to start matching from the beginning. This is purely an optimisation |
|
|
920 | and is usually worth only when you expect more than a few kilobytes. |
|
|
921 | |
|
|
922 | Example: expect a http header, which ends at C<\015\012\015\012>. Since we |
|
|
923 | expect the header to be very large (it isn't in practise, but...), we use |
|
|
924 | a skip regex to skip initial portions. The skip regex is tricky in that |
|
|
925 | it only accepts something not ending in either \015 or \012, as these are |
|
|
926 | required for the accept regex. |
|
|
927 | |
|
|
928 | $handle->push_read (regex => |
|
|
929 | qr<\015\012\015\012>, |
|
|
930 | undef, # no reject |
|
|
931 | qr<^.*[^\015\012]>, |
|
|
932 | sub { ... }); |
|
|
933 | |
|
|
934 | =cut |
|
|
935 | |
|
|
936 | register_read_type regex => sub { |
|
|
937 | my ($self, $cb, $accept, $reject, $skip) = @_; |
|
|
938 | |
|
|
939 | my $data; |
|
|
940 | my $rbuf = \$self->{rbuf}; |
|
|
941 | |
|
|
942 | sub { |
|
|
943 | # accept |
|
|
944 | if ($$rbuf =~ $accept) { |
|
|
945 | $data .= substr $$rbuf, 0, $+[0], ""; |
|
|
946 | $cb->($self, $data); |
|
|
947 | return 1; |
|
|
948 | } |
|
|
949 | |
|
|
950 | # reject |
|
|
951 | if ($reject && $$rbuf =~ $reject) { |
|
|
952 | $self->_error (&Errno::EBADMSG); |
|
|
953 | } |
|
|
954 | |
|
|
955 | # skip |
|
|
956 | if ($skip && $$rbuf =~ $skip) { |
|
|
957 | $data .= substr $$rbuf, 0, $+[0], ""; |
|
|
958 | } |
|
|
959 | |
|
|
960 | () |
|
|
961 | } |
|
|
962 | }; |
|
|
963 | |
|
|
964 | =item json => $cb->($handle, $hash_or_arrayref) |
|
|
965 | |
|
|
966 | Reads a JSON object or array, decodes it and passes it to the callback. |
|
|
967 | |
|
|
968 | If a C<json> object was passed to the constructor, then that will be used |
|
|
969 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
|
|
970 | |
|
|
971 | This read type uses the incremental parser available with JSON version |
|
|
972 | 2.09 (and JSON::XS version 2.2) and above. You have to provide a |
|
|
973 | dependency on your own: this module will load the JSON module, but |
|
|
974 | AnyEvent does not depend on it itself. |
|
|
975 | |
|
|
976 | Since JSON texts are fully self-delimiting, the C<json> read and write |
|
|
977 | types are an ideal simple RPC protocol: just exchange JSON datagrams. See |
|
|
978 | the C<json> write type description, above, for an actual example. |
|
|
979 | |
|
|
980 | =cut |
|
|
981 | |
|
|
982 | register_read_type json => sub { |
|
|
983 | my ($self, $cb, $accept, $reject, $skip) = @_; |
|
|
984 | |
|
|
985 | require JSON; |
|
|
986 | |
|
|
987 | my $data; |
|
|
988 | my $rbuf = \$self->{rbuf}; |
|
|
989 | |
|
|
990 | my $json = $self->{json} ||= JSON->new->utf8; |
|
|
991 | |
|
|
992 | sub { |
|
|
993 | my $ref = $json->incr_parse ($self->{rbuf}); |
|
|
994 | |
|
|
995 | if ($ref) { |
|
|
996 | $self->{rbuf} = $json->incr_text; |
|
|
997 | $json->incr_text = ""; |
|
|
998 | $cb->($self, $ref); |
|
|
999 | |
|
|
1000 | 1 |
|
|
1001 | } else { |
|
|
1002 | $self->{rbuf} = ""; |
|
|
1003 | () |
|
|
1004 | } |
|
|
1005 | } |
|
|
1006 | }; |
|
|
1007 | |
718 | =back |
1008 | =back |
719 | |
1009 | |
|
|
1010 | =item AnyEvent::Handle::register_read_type type => $coderef->($handle, $cb, @args) |
|
|
1011 | |
|
|
1012 | This function (not method) lets you add your own types to C<push_read>. |
|
|
1013 | |
|
|
1014 | Whenever the given C<type> is used, C<push_read> will invoke the code |
|
|
1015 | reference with the handle object, the callback and the remaining |
|
|
1016 | arguments. |
|
|
1017 | |
|
|
1018 | The code reference is supposed to return a callback (usually a closure) |
|
|
1019 | that works as a plain read callback (see C<< ->push_read ($cb) >>). |
|
|
1020 | |
|
|
1021 | It should invoke the passed callback when it is done reading (remember to |
|
|
1022 | pass C<$handle> as first argument as all other callbacks do that). |
|
|
1023 | |
|
|
1024 | Note that this is a function, and all types registered this way will be |
|
|
1025 | global, so try to use unique names. |
|
|
1026 | |
|
|
1027 | For examples, see the source of this module (F<perldoc -m AnyEvent::Handle>, |
|
|
1028 | search for C<register_read_type>)). |
|
|
1029 | |
720 | =item $handle->stop_read |
1030 | =item $handle->stop_read |
721 | |
1031 | |
722 | =item $handle->start_read |
1032 | =item $handle->start_read |
723 | |
1033 | |
724 | In rare cases you actually do not want to read anything from the |
1034 | In rare cases you actually do not want to read anything from the |
725 | socket. In this case you can call C<stop_read>. Neither C<on_read> no |
1035 | socket. In this case you can call C<stop_read>. Neither C<on_read> nor |
726 | any queued callbacks will be executed then. To start reading again, call |
1036 | any queued callbacks will be executed then. To start reading again, call |
727 | C<start_read>. |
1037 | C<start_read>. |
728 | |
1038 | |
|
|
1039 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
|
|
1040 | you change the C<on_read> callback or push/unshift a read callback, and it |
|
|
1041 | will automatically C<stop_read> for you when neither C<on_read> is set nor |
|
|
1042 | there are any read requests in the queue. |
|
|
1043 | |
729 | =cut |
1044 | =cut |
730 | |
1045 | |
731 | sub stop_read { |
1046 | sub stop_read { |
732 | my ($self) = @_; |
1047 | my ($self) = @_; |
733 | |
1048 | |
734 | delete $self->{rw}; |
1049 | delete $self->{_rw}; |
735 | } |
1050 | } |
736 | |
1051 | |
737 | sub start_read { |
1052 | sub start_read { |
738 | my ($self) = @_; |
1053 | my ($self) = @_; |
739 | |
1054 | |
740 | unless ($self->{rw} || $self->{eof}) { |
1055 | unless ($self->{_rw} || $self->{_eof}) { |
741 | Scalar::Util::weaken $self; |
1056 | Scalar::Util::weaken $self; |
742 | |
1057 | |
743 | $self->{rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
1058 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
744 | my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; |
1059 | my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; |
745 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
1060 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
746 | |
1061 | |
747 | if ($len > 0) { |
1062 | if ($len > 0) { |
|
|
1063 | $self->{_activity} = AnyEvent->now; |
|
|
1064 | |
748 | $self->{filter_r} |
1065 | $self->{filter_r} |
749 | ? $self->{filter_r}->($self, $rbuf) |
1066 | ? $self->{filter_r}($self, $rbuf) |
750 | : $self->_drain_rbuf; |
1067 | : $self->_drain_rbuf; |
751 | |
1068 | |
752 | } elsif (defined $len) { |
1069 | } elsif (defined $len) { |
753 | delete $self->{rw}; |
1070 | delete $self->{_rw}; |
754 | $self->{eof} = 1; |
1071 | $self->{_eof} = 1; |
755 | $self->_drain_rbuf; |
1072 | $self->_drain_rbuf; |
756 | |
1073 | |
757 | } elsif ($! != EAGAIN && $! != EINTR) { |
1074 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
758 | return $self->error; |
1075 | return $self->_error ($!, 1); |
759 | } |
1076 | } |
760 | }); |
1077 | }); |
761 | } |
1078 | } |
762 | } |
1079 | } |
763 | |
1080 | |
764 | sub _dotls { |
1081 | sub _dotls { |
765 | my ($self) = @_; |
1082 | my ($self) = @_; |
766 | |
1083 | |
|
|
1084 | my $buf; |
|
|
1085 | |
767 | if (length $self->{tls_wbuf}) { |
1086 | if (length $self->{_tls_wbuf}) { |
768 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{tls_wbuf})) > 0) { |
1087 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
769 | substr $self->{tls_wbuf}, 0, $len, ""; |
1088 | substr $self->{_tls_wbuf}, 0, $len, ""; |
770 | } |
1089 | } |
771 | } |
1090 | } |
772 | |
1091 | |
773 | if (defined (my $buf = Net::SSLeay::BIO_read ($self->{tls_wbio}))) { |
1092 | if (length ($buf = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
774 | $self->{wbuf} .= $buf; |
1093 | $self->{wbuf} .= $buf; |
775 | $self->_drain_wbuf; |
1094 | $self->_drain_wbuf; |
776 | } |
1095 | } |
777 | |
1096 | |
778 | while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) { |
1097 | while (defined ($buf = Net::SSLeay::read ($self->{tls}))) { |
|
|
1098 | if (length $buf) { |
779 | $self->{rbuf} .= $buf; |
1099 | $self->{rbuf} .= $buf; |
780 | $self->_drain_rbuf; |
1100 | $self->_drain_rbuf; |
|
|
1101 | } else { |
|
|
1102 | # let's treat SSL-eof as we treat normal EOF |
|
|
1103 | $self->{_eof} = 1; |
|
|
1104 | $self->_shutdown; |
|
|
1105 | return; |
|
|
1106 | } |
781 | } |
1107 | } |
782 | |
1108 | |
783 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
1109 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
784 | |
1110 | |
785 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
1111 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
786 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
1112 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
787 | $self->error; |
1113 | return $self->_error ($!, 1); |
788 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
1114 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
789 | $! = &Errno::EIO; |
1115 | return $self->_error (&Errno::EIO, 1); |
790 | $self->error; |
|
|
791 | } |
1116 | } |
792 | |
1117 | |
793 | # all others are fine for our purposes |
1118 | # all others are fine for our purposes |
794 | } |
1119 | } |
795 | } |
1120 | } |
… | |
… | |
804 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
1129 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
805 | |
1130 | |
806 | The second argument is the optional C<Net::SSLeay::CTX> object that is |
1131 | The second argument is the optional C<Net::SSLeay::CTX> object that is |
807 | used when AnyEvent::Handle has to create its own TLS connection object. |
1132 | used when AnyEvent::Handle has to create its own TLS connection object. |
808 | |
1133 | |
809 | =cut |
1134 | The TLS connection object will end up in C<< $handle->{tls} >> after this |
|
|
1135 | call and can be used or changed to your liking. Note that the handshake |
|
|
1136 | might have already started when this function returns. |
810 | |
1137 | |
811 | # TODO: maybe document... |
1138 | =cut |
|
|
1139 | |
812 | sub starttls { |
1140 | sub starttls { |
813 | my ($self, $ssl, $ctx) = @_; |
1141 | my ($self, $ssl, $ctx) = @_; |
814 | |
1142 | |
815 | $self->stoptls; |
1143 | $self->stoptls; |
816 | |
1144 | |
… | |
… | |
828 | # but the openssl maintainers basically said: "trust us, it just works". |
1156 | # but the openssl maintainers basically said: "trust us, it just works". |
829 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
1157 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
830 | # and mismaintained ssleay-module doesn't even offer them). |
1158 | # and mismaintained ssleay-module doesn't even offer them). |
831 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
1159 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
832 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
1160 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
833 | (eval { Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
1161 | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
834 | | (eval { Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
1162 | | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
835 | |
1163 | |
836 | $self->{tls_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1164 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
837 | $self->{tls_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1165 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
838 | |
1166 | |
839 | Net::SSLeay::set_bio ($ssl, $self->{tls_rbio}, $self->{tls_wbio}); |
1167 | Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio}); |
840 | |
1168 | |
841 | $self->{filter_w} = sub { |
1169 | $self->{filter_w} = sub { |
842 | $_[0]{tls_wbuf} .= ${$_[1]}; |
1170 | $_[0]{_tls_wbuf} .= ${$_[1]}; |
843 | &_dotls; |
1171 | &_dotls; |
844 | }; |
1172 | }; |
845 | $self->{filter_r} = sub { |
1173 | $self->{filter_r} = sub { |
846 | Net::SSLeay::BIO_write ($_[0]{tls_rbio}, ${$_[1]}); |
1174 | Net::SSLeay::BIO_write ($_[0]{_rbio}, ${$_[1]}); |
847 | &_dotls; |
1175 | &_dotls; |
848 | }; |
1176 | }; |
849 | } |
1177 | } |
850 | |
1178 | |
851 | =item $handle->stoptls |
1179 | =item $handle->stoptls |
… | |
… | |
857 | |
1185 | |
858 | sub stoptls { |
1186 | sub stoptls { |
859 | my ($self) = @_; |
1187 | my ($self) = @_; |
860 | |
1188 | |
861 | Net::SSLeay::free (delete $self->{tls}) if $self->{tls}; |
1189 | Net::SSLeay::free (delete $self->{tls}) if $self->{tls}; |
|
|
1190 | |
862 | delete $self->{tls_rbio}; |
1191 | delete $self->{_rbio}; |
863 | delete $self->{tls_wbio}; |
1192 | delete $self->{_wbio}; |
864 | delete $self->{tls_wbuf}; |
1193 | delete $self->{_tls_wbuf}; |
865 | delete $self->{filter_r}; |
1194 | delete $self->{filter_r}; |
866 | delete $self->{filter_w}; |
1195 | delete $self->{filter_w}; |
867 | } |
1196 | } |
868 | |
1197 | |
869 | sub DESTROY { |
1198 | sub DESTROY { |
… | |
… | |
907 | } |
1236 | } |
908 | } |
1237 | } |
909 | |
1238 | |
910 | =back |
1239 | =back |
911 | |
1240 | |
|
|
1241 | =head1 SUBCLASSING AnyEvent::Handle |
|
|
1242 | |
|
|
1243 | In many cases, you might want to subclass AnyEvent::Handle. |
|
|
1244 | |
|
|
1245 | To make this easier, a given version of AnyEvent::Handle uses these |
|
|
1246 | conventions: |
|
|
1247 | |
|
|
1248 | =over 4 |
|
|
1249 | |
|
|
1250 | =item * all constructor arguments become object members. |
|
|
1251 | |
|
|
1252 | At least initially, when you pass a C<tls>-argument to the constructor it |
|
|
1253 | will end up in C<< $handle->{tls} >>. Those members might be changes or |
|
|
1254 | mutated later on (for example C<tls> will hold the TLS connection object). |
|
|
1255 | |
|
|
1256 | =item * other object member names are prefixed with an C<_>. |
|
|
1257 | |
|
|
1258 | All object members not explicitly documented (internal use) are prefixed |
|
|
1259 | with an underscore character, so the remaining non-C<_>-namespace is free |
|
|
1260 | for use for subclasses. |
|
|
1261 | |
|
|
1262 | =item * all members not documented here and not prefixed with an underscore |
|
|
1263 | are free to use in subclasses. |
|
|
1264 | |
|
|
1265 | Of course, new versions of AnyEvent::Handle may introduce more "public" |
|
|
1266 | member variables, but thats just life, at least it is documented. |
|
|
1267 | |
|
|
1268 | =back |
|
|
1269 | |
912 | =head1 AUTHOR |
1270 | =head1 AUTHOR |
913 | |
1271 | |
914 | Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. |
1272 | Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. |
915 | |
1273 | |
916 | =cut |
1274 | =cut |