… | |
… | |
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(WSAWOULDBLOCK); |
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 filehandles 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 = '0.02'; |
19 | our $VERSION = '0.04'; |
20 | |
20 | |
21 | =head1 SYNOPSIS |
21 | =head1 SYNOPSIS |
22 | |
22 | |
23 | use AnyEvent; |
23 | use AnyEvent; |
24 | use AnyEvent::Handle; |
24 | use AnyEvent::Handle; |
25 | |
25 | |
26 | my $cv = AnyEvent->condvar; |
26 | my $cv = AnyEvent->condvar; |
27 | |
27 | |
28 | my $ae_fh = AnyEvent::Handle->new (fh => \*STDIN); |
28 | my $handle = |
29 | |
|
|
30 | #TODO |
|
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31 | |
|
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32 | # or use the constructor to pass the callback: |
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33 | |
|
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34 | my $ae_fh2 = |
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35 | AnyEvent::Handle->new ( |
29 | AnyEvent::Handle->new ( |
36 | fh => \*STDIN, |
30 | fh => \*STDIN, |
37 | on_eof => sub { |
31 | on_eof => sub { |
38 | $cv->broadcast; |
32 | $cv->broadcast; |
39 | }, |
33 | }, |
40 | #TODO |
|
|
41 | ); |
34 | ); |
42 | |
35 | |
43 | $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; |
44 | |
47 | |
45 | =head1 DESCRIPTION |
48 | =head1 DESCRIPTION |
46 | |
49 | |
47 | 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 |
48 | filehandles (and sockets, see L<AnyEvent::Socket> for an easy way to make |
51 | filehandles. For utility functions for doing non-blocking connects and accepts |
49 | non-blocking resolves and connects). |
52 | on sockets see L<AnyEvent::Util>. |
50 | |
53 | |
51 | In the following, when the documentation refers to of "bytes" then this |
54 | In the following, when the documentation refers to of "bytes" then this |
52 | means characters. As sysread and syswrite are used for all I/O, their |
55 | means characters. As sysread and syswrite are used for all I/O, their |
53 | treatment of characters applies to this module as well. |
56 | treatment of characters applies to this module as well. |
54 | |
57 | |
… | |
… | |
70 | The filehandle this L<AnyEvent::Handle> object will operate on. |
73 | The filehandle this L<AnyEvent::Handle> object will operate on. |
71 | |
74 | |
72 | NOTE: The filehandle will be set to non-blocking (using |
75 | NOTE: The filehandle will be set to non-blocking (using |
73 | AnyEvent::Util::fh_nonblocking). |
76 | AnyEvent::Util::fh_nonblocking). |
74 | |
77 | |
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78 | =item on_eof => $cb->($self) |
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79 | |
|
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80 | Set the callback to be called on EOF. |
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81 | |
|
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82 | While not mandatory, it is highly recommended to set an eof callback, |
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83 | otherwise you might end up with a closed socket while you are still |
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84 | waiting for data. |
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85 | |
75 | =item on_error => $cb->($self) [MANDATORY] |
86 | =item on_error => $cb->($self) |
76 | |
87 | |
77 | This is the fatal error callback, that is called when a fatal error ocurs, |
88 | This is the fatal error callback, that is called when, well, a fatal error |
78 | such as not being able to resolve the hostname, failure to connect or a |
89 | occurs, such as not being able to resolve the hostname, failure to connect |
79 | read error. |
90 | or a read error. |
80 | |
91 | |
81 | The object will not be in a usable state when this callback has been |
92 | The object will not be in a usable state when this callback has been |
82 | called. |
93 | called. |
83 | |
94 | |
84 | On callback entrance, the value of C<$!> contains the opertaing system |
95 | On callback entrance, the value of C<$!> contains the operating system |
85 | error (or C<ENOSPC> or C<EPIPE>). |
96 | error (or C<ENOSPC>, C<EPIPE> or C<EBADMSG>). |
86 | |
97 | |
87 | =item on_eof => $cb->($self) [MANDATORY] |
98 | While not mandatory, it is I<highly> recommended to set this callback, as |
88 | |
99 | you will not be notified of errors otherwise. The default simply calls |
89 | Set the callback to be called on EOF. |
100 | die. |
90 | |
101 | |
91 | =item on_read => $cb->($self) |
102 | =item on_read => $cb->($self) |
92 | |
103 | |
93 | This sets the default read callback, which is called when data arrives |
104 | This sets the default read callback, which is called when data arrives |
94 | and no read request is in the queue. If the read callback is C<undef> |
105 | and no read request is in the queue. |
95 | or has never been set, than AnyEvent::Handle will cease reading from the |
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96 | filehandle. |
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97 | |
106 | |
98 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
107 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
99 | method or acces sthe C<$self->{rbuf}> member directly. |
108 | method or access the C<$self->{rbuf}> member directly. |
100 | |
109 | |
101 | When an EOF condition is detected then AnyEvent::Handle will first try to |
110 | When an EOF condition is detected then AnyEvent::Handle will first try to |
102 | feed all the remaining data to the queued callbacks and C<on_read> before |
111 | feed all the remaining data to the queued callbacks and C<on_read> before |
103 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
112 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
104 | error will be raised (with C<$!> set to C<EPIPE>). |
113 | error will be raised (with C<$!> set to C<EPIPE>). |
… | |
… | |
131 | |
140 | |
132 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
141 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
133 | buffer: If the write reaches this size or gets even samller it is |
142 | buffer: If the write reaches this size or gets even samller it is |
134 | considered empty. |
143 | considered empty. |
135 | |
144 | |
|
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145 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
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146 | |
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147 | When this parameter is given, it enables TLS (SSL) mode, that means it |
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148 | will start making tls handshake and will transparently encrypt/decrypt |
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149 | data. |
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150 | |
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151 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
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152 | automatically when you try to create a TLS handle). |
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153 | |
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154 | For the TLS server side, use C<accept>, and for the TLS client side of a |
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155 | connection, use C<connect> mode. |
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156 | |
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157 | You can also provide your own TLS connection object, but you have |
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158 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
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159 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
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160 | AnyEvent::Handle. |
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161 | |
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162 | See the C<starttls> method if you need to start TLs negotiation later. |
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163 | |
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164 | =item tls_ctx => $ssl_ctx |
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165 | |
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166 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
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167 | (unless a connection object was specified directly). If this parameter is |
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168 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
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169 | |
136 | =back |
170 | =back |
137 | |
171 | |
138 | =cut |
172 | =cut |
139 | |
173 | |
140 | sub new { |
174 | sub new { |
… | |
… | |
144 | |
178 | |
145 | $self->{fh} or Carp::croak "mandatory argument fh is missing"; |
179 | $self->{fh} or Carp::croak "mandatory argument fh is missing"; |
146 | |
180 | |
147 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
181 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
148 | |
182 | |
149 | $self->on_error ((delete $self->{on_error}) or Carp::croak "mandatory argument on_error is missing"); |
183 | if ($self->{tls}) { |
150 | $self->on_eof ((delete $self->{on_eof} ) or Carp::croak "mandatory argument on_eof is missing"); |
184 | require Net::SSLeay; |
|
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185 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
|
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186 | } |
151 | |
187 | |
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188 | $self->on_eof (delete $self->{on_eof} ) if $self->{on_eof}; |
|
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189 | $self->on_error (delete $self->{on_error}) if $self->{on_error}; |
152 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
190 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
153 | $self->on_read (delete $self->{on_read} ) if $self->{on_read}; |
191 | $self->on_read (delete $self->{on_read} ) if $self->{on_read}; |
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192 | |
|
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193 | $self->start_read; |
154 | |
194 | |
155 | $self |
195 | $self |
156 | } |
196 | } |
157 | |
197 | |
158 | sub _shutdown { |
198 | sub _shutdown { |
… | |
… | |
169 | { |
209 | { |
170 | local $!; |
210 | local $!; |
171 | $self->_shutdown; |
211 | $self->_shutdown; |
172 | } |
212 | } |
173 | |
213 | |
|
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214 | if ($self->{on_error}) { |
174 | $self->{on_error}($self); |
215 | $self->{on_error}($self); |
|
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216 | } else { |
|
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217 | Carp::croak "AnyEvent::Handle uncaught fatal error: $!"; |
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218 | } |
175 | } |
219 | } |
176 | |
220 | |
177 | =item $fh = $handle->fh |
221 | =item $fh = $handle->fh |
178 | |
222 | |
179 | This method returns the filehandle of the L<AnyEvent::Handle> object. |
223 | This method returns the file handle of the L<AnyEvent::Handle> object. |
180 | |
224 | |
181 | =cut |
225 | =cut |
182 | |
226 | |
183 | sub fh { $_[0]->{fh} } |
227 | sub fh { $_[0]->{fh} } |
184 | |
228 | |
… | |
… | |
212 | for reading. |
256 | for reading. |
213 | |
257 | |
214 | The write queue is very simple: you can add data to its end, and |
258 | The write queue is very simple: you can add data to its end, and |
215 | AnyEvent::Handle will automatically try to get rid of it for you. |
259 | AnyEvent::Handle will automatically try to get rid of it for you. |
216 | |
260 | |
217 | When data could be writtena nd the write buffer is shorter then the low |
261 | When data could be written and the write buffer is shorter then the low |
218 | water mark, the C<on_drain> callback will be invoked. |
262 | water mark, the C<on_drain> callback will be invoked. |
219 | |
263 | |
220 | =over 4 |
264 | =over 4 |
221 | |
265 | |
222 | =item $handle->on_drain ($cb) |
266 | =item $handle->on_drain ($cb) |
… | |
… | |
241 | want (only limited by the available memory), as C<AnyEvent::Handle> |
285 | want (only limited by the available memory), as C<AnyEvent::Handle> |
242 | buffers it independently of the kernel. |
286 | buffers it independently of the kernel. |
243 | |
287 | |
244 | =cut |
288 | =cut |
245 | |
289 | |
246 | sub push_write { |
290 | sub _drain_wbuf { |
247 | my ($self, $data) = @_; |
291 | my ($self) = @_; |
248 | |
292 | |
249 | $self->{wbuf} .= $data; |
293 | if (!$self->{ww} && length $self->{wbuf}) { |
250 | |
|
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251 | unless ($self->{ww}) { |
|
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252 | Scalar::Util::weaken $self; |
294 | Scalar::Util::weaken $self; |
253 | my $cb = sub { |
295 | my $cb = sub { |
254 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
296 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
255 | |
297 | |
256 | if ($len > 0) { |
298 | if ($len >= 0) { |
257 | substr $self->{wbuf}, 0, $len, ""; |
299 | substr $self->{wbuf}, 0, $len, ""; |
258 | |
|
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259 | |
300 | |
260 | $self->{on_drain}($self) |
301 | $self->{on_drain}($self) |
261 | if $self->{low_water_mark} >= length $self->{wbuf} |
302 | if $self->{low_water_mark} >= length $self->{wbuf} |
262 | && $self->{on_drain}; |
303 | && $self->{on_drain}; |
263 | |
304 | |
264 | delete $self->{ww} unless length $self->{wbuf}; |
305 | delete $self->{ww} unless length $self->{wbuf}; |
265 | } elsif ($! != EAGAIN && $! != EINTR) { |
306 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAWOULDBLOCK) { |
266 | $self->error; |
307 | $self->error; |
267 | } |
308 | } |
268 | }; |
309 | }; |
269 | |
310 | |
270 | $self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb); |
311 | $self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb); |
271 | |
312 | |
272 | $cb->($self); |
313 | $cb->($self); |
273 | }; |
314 | }; |
274 | } |
315 | } |
|
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316 | |
|
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317 | our %WH; |
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318 | |
|
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319 | sub register_write_type($$) { |
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320 | $WH{$_[0]} = $_[1]; |
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321 | } |
|
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322 | |
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323 | sub push_write { |
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324 | my $self = shift; |
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325 | |
|
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326 | if (@_ > 1) { |
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327 | my $type = shift; |
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328 | |
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329 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
|
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330 | ->($self, @_); |
|
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331 | } |
|
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332 | |
|
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333 | if ($self->{filter_w}) { |
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334 | $self->{filter_w}->($self, \$_[0]); |
|
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335 | } else { |
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336 | $self->{wbuf} .= $_[0]; |
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337 | $self->_drain_wbuf; |
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338 | } |
|
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339 | } |
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340 | |
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341 | =item $handle->push_write (type => @args) |
|
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342 | |
|
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343 | =item $handle->unshift_write (type => @args) |
|
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344 | |
|
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345 | Instead of formatting your data yourself, you can also let this module do |
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346 | the job by specifying a type and type-specific arguments. |
|
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347 | |
|
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348 | Predefined types are (if you have ideas for additional types, feel free to |
|
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349 | drop by and tell us): |
|
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350 | |
|
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351 | =over 4 |
|
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352 | |
|
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353 | =item netstring => $string |
|
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354 | |
|
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355 | Formats the given value as netstring |
|
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356 | (http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them). |
|
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357 | |
|
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358 | =back |
|
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359 | |
|
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360 | =cut |
|
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361 | |
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362 | register_write_type netstring => sub { |
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363 | my ($self, $string) = @_; |
|
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364 | |
|
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365 | sprintf "%d:%s,", (length $string), $string |
|
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366 | }; |
|
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367 | |
|
|
368 | =item AnyEvent::Handle::register_write_type type => $coderef->($self, @args) |
|
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369 | |
|
|
370 | This function (not method) lets you add your own types to C<push_write>. |
|
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371 | Whenever the given C<type> is used, C<push_write> will invoke the code |
|
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372 | reference with the handle object and the remaining arguments. |
|
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373 | |
|
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374 | The code reference is supposed to return a single octet string that will |
|
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375 | be appended to the write buffer. |
|
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376 | |
|
|
377 | Note that this is a function, and all types registered this way will be |
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378 | global, so try to use unique names. |
|
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379 | |
|
|
380 | =cut |
275 | |
381 | |
276 | ############################################################################# |
382 | ############################################################################# |
277 | |
383 | |
278 | =back |
384 | =back |
279 | |
385 | |
… | |
… | |
349 | ... |
455 | ... |
350 | }); |
456 | }); |
351 | |
457 | |
352 | =over 4 |
458 | =over 4 |
353 | |
459 | |
|
|
460 | =cut |
|
|
461 | |
354 | sub _drain_rbuf { |
462 | sub _drain_rbuf { |
355 | my ($self) = @_; |
463 | my ($self) = @_; |
356 | |
464 | |
|
|
465 | if ( |
|
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466 | defined $self->{rbuf_max} |
|
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467 | && $self->{rbuf_max} < length $self->{rbuf} |
|
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468 | ) { |
|
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469 | $! = &Errno::ENOSPC; return $self->error; |
|
|
470 | } |
|
|
471 | |
357 | return if exists $self->{in_drain}; |
472 | return if $self->{in_drain}; |
358 | local $self->{in_drain} = 1; |
473 | local $self->{in_drain} = 1; |
359 | |
474 | |
360 | while (my $len = length $self->{rbuf}) { |
475 | while (my $len = length $self->{rbuf}) { |
361 | no strict 'refs'; |
476 | no strict 'refs'; |
362 | if (@{ $self->{queue} }) { |
477 | if (my $cb = shift @{ $self->{queue} }) { |
363 | if ($self->{queue}[0]($self)) { |
478 | unless ($cb->($self)) { |
364 | shift @{ $self->{queue} }; |
|
|
365 | } elsif ($self->{eof}) { |
479 | if ($self->{eof}) { |
366 | # no progress can be made (not enough data and no data forthcoming) |
480 | # no progress can be made (not enough data and no data forthcoming) |
367 | $! = &Errno::EPIPE; return $self->error; |
481 | $! = &Errno::EPIPE; return $self->error; |
368 | } else { |
482 | } |
|
|
483 | |
|
|
484 | unshift @{ $self->{queue} }, $cb; |
369 | return; |
485 | return; |
370 | } |
486 | } |
371 | } elsif ($self->{on_read}) { |
487 | } elsif ($self->{on_read}) { |
372 | $self->{on_read}($self); |
488 | $self->{on_read}($self); |
373 | |
489 | |
… | |
… | |
387 | } |
503 | } |
388 | } |
504 | } |
389 | |
505 | |
390 | if ($self->{eof}) { |
506 | if ($self->{eof}) { |
391 | $self->_shutdown; |
507 | $self->_shutdown; |
392 | $self->{on_eof}($self); |
508 | $self->{on_eof}($self) |
|
|
509 | if $self->{on_eof}; |
393 | } |
510 | } |
394 | } |
511 | } |
395 | |
512 | |
396 | =item $handle->on_read ($cb) |
513 | =item $handle->on_read ($cb) |
397 | |
514 | |
… | |
… | |
403 | |
520 | |
404 | sub on_read { |
521 | sub on_read { |
405 | my ($self, $cb) = @_; |
522 | my ($self, $cb) = @_; |
406 | |
523 | |
407 | $self->{on_read} = $cb; |
524 | $self->{on_read} = $cb; |
408 | |
|
|
409 | unless ($self->{rw} || $self->{eof}) { |
|
|
410 | Scalar::Util::weaken $self; |
|
|
411 | |
|
|
412 | $self->{rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
|
|
413 | my $len = sysread $self->{fh}, $self->{rbuf}, $self->{read_size} || 8192, length $self->{rbuf}; |
|
|
414 | |
|
|
415 | if ($len > 0) { |
|
|
416 | if (exists $self->{rbuf_max}) { |
|
|
417 | if ($self->{rbuf_max} < length $self->{rbuf}) { |
|
|
418 | $! = &Errno::ENOSPC; return $self->error; |
|
|
419 | } |
|
|
420 | } |
|
|
421 | |
|
|
422 | } elsif (defined $len) { |
|
|
423 | $self->{eof} = 1; |
|
|
424 | delete $self->{rw}; |
|
|
425 | |
|
|
426 | } elsif ($! != EAGAIN && $! != EINTR) { |
|
|
427 | return $self->error; |
|
|
428 | } |
|
|
429 | |
|
|
430 | $self->_drain_rbuf; |
|
|
431 | }); |
|
|
432 | } |
|
|
433 | } |
525 | } |
434 | |
526 | |
435 | =item $handle->rbuf |
527 | =item $handle->rbuf |
436 | |
528 | |
437 | Returns the read buffer (as a modifiable lvalue). |
529 | Returns the read buffer (as a modifiable lvalue). |
… | |
… | |
456 | Append the given callback to the end of the queue (C<push_read>) or |
548 | Append the given callback to the end of the queue (C<push_read>) or |
457 | prepend it (C<unshift_read>). |
549 | prepend it (C<unshift_read>). |
458 | |
550 | |
459 | The callback is called each time some additional read data arrives. |
551 | The callback is called each time some additional read data arrives. |
460 | |
552 | |
461 | It must check wether enough data is in the read buffer already. |
553 | It must check whether enough data is in the read buffer already. |
462 | |
554 | |
463 | If not enough data is available, it must return the empty list or a false |
555 | If not enough data is available, it must return the empty list or a false |
464 | value, in which case it will be called repeatedly until enough data is |
556 | value, in which case it will be called repeatedly until enough data is |
465 | available (or an error condition is detected). |
557 | available (or an error condition is detected). |
466 | |
558 | |
… | |
… | |
468 | interested in (which can be none at all) and return a true value. After returning |
560 | interested in (which can be none at all) and return a true value. After returning |
469 | true, it will be removed from the queue. |
561 | true, it will be removed from the queue. |
470 | |
562 | |
471 | =cut |
563 | =cut |
472 | |
564 | |
|
|
565 | our %RH; |
|
|
566 | |
|
|
567 | sub register_read_type($$) { |
|
|
568 | $RH{$_[0]} = $_[1]; |
|
|
569 | } |
|
|
570 | |
473 | sub push_read { |
571 | sub push_read { |
474 | my ($self, $cb) = @_; |
572 | my $self = shift; |
|
|
573 | my $cb = pop; |
|
|
574 | |
|
|
575 | if (@_) { |
|
|
576 | my $type = shift; |
|
|
577 | |
|
|
578 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
|
|
579 | ->($self, $cb, @_); |
|
|
580 | } |
475 | |
581 | |
476 | push @{ $self->{queue} }, $cb; |
582 | push @{ $self->{queue} }, $cb; |
477 | $self->_drain_rbuf; |
583 | $self->_drain_rbuf; |
478 | } |
584 | } |
479 | |
585 | |
480 | sub unshift_read { |
586 | sub unshift_read { |
481 | my ($self, $cb) = @_; |
587 | my $self = shift; |
|
|
588 | my $cb = pop; |
482 | |
589 | |
|
|
590 | if (@_) { |
|
|
591 | my $type = shift; |
|
|
592 | |
|
|
593 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read") |
|
|
594 | ->($self, $cb, @_); |
|
|
595 | } |
|
|
596 | |
|
|
597 | |
483 | push @{ $self->{queue} }, $cb; |
598 | unshift @{ $self->{queue} }, $cb; |
484 | $self->_drain_rbuf; |
599 | $self->_drain_rbuf; |
485 | } |
600 | } |
486 | |
601 | |
487 | =item $handle->push_read_chunk ($len, $cb->($self, $data)) |
602 | =item $handle->push_read (type => @args, $cb) |
488 | |
603 | |
489 | =item $handle->unshift_read_chunk ($len, $cb->($self, $data)) |
604 | =item $handle->unshift_read (type => @args, $cb) |
490 | |
605 | |
491 | Append the given callback to the end of the queue (C<push_read_chunk>) or |
606 | Instead of providing a callback that parses the data itself you can chose |
492 | prepend it (C<unshift_read_chunk>). |
607 | between a number of predefined parsing formats, for chunks of data, lines |
|
|
608 | etc. |
493 | |
609 | |
494 | The callback will be called only once C<$len> bytes have been read, and |
610 | Predefined types are (if you have ideas for additional types, feel free to |
495 | these C<$len> bytes will be passed to the callback. |
611 | drop by and tell us): |
496 | |
612 | |
497 | =cut |
613 | =over 4 |
498 | |
614 | |
499 | sub _read_chunk($$) { |
615 | =item chunk => $octets, $cb->($self, $data) |
500 | my ($len, $cb) = @_; |
616 | |
|
|
617 | Invoke the callback only once C<$octets> bytes have been read. Pass the |
|
|
618 | data read to the callback. The callback will never be called with less |
|
|
619 | data. |
|
|
620 | |
|
|
621 | Example: read 2 bytes. |
|
|
622 | |
|
|
623 | $handle->push_read (chunk => 2, sub { |
|
|
624 | warn "yay ", unpack "H*", $_[1]; |
|
|
625 | }); |
|
|
626 | |
|
|
627 | =cut |
|
|
628 | |
|
|
629 | register_read_type chunk => sub { |
|
|
630 | my ($self, $cb, $len) = @_; |
501 | |
631 | |
502 | sub { |
632 | sub { |
503 | $len <= length $_[0]{rbuf} or return; |
633 | $len <= length $_[0]{rbuf} or return; |
504 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
634 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
505 | 1 |
635 | 1 |
506 | } |
636 | } |
507 | } |
637 | }; |
508 | |
638 | |
|
|
639 | # compatibility with older API |
509 | sub push_read_chunk { |
640 | sub push_read_chunk { |
510 | my ($self, $len, $cb) = @_; |
641 | $_[0]->push_read (chunk => $_[1], $_[2]); |
511 | |
|
|
512 | $self->push_read (_read_chunk $len, $cb); |
|
|
513 | } |
642 | } |
514 | |
|
|
515 | |
643 | |
516 | sub unshift_read_chunk { |
644 | sub unshift_read_chunk { |
517 | my ($self, $len, $cb) = @_; |
645 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
518 | |
|
|
519 | $self->unshift_read (_read_chunk $len, $cb); |
|
|
520 | } |
646 | } |
521 | |
647 | |
522 | =item $handle->push_read_line ([$eol, ]$cb->($self, $line, $eol)) |
648 | =item line => [$eol, ]$cb->($self, $line, $eol) |
523 | |
|
|
524 | =item $handle->unshift_read_line ([$eol, ]$cb->($self, $line, $eol)) |
|
|
525 | |
|
|
526 | Append the given callback to the end of the queue (C<push_read_line>) or |
|
|
527 | prepend it (C<unshift_read_line>). |
|
|
528 | |
649 | |
529 | The callback will be called only once a full line (including the end of |
650 | The callback will be called only once a full line (including the end of |
530 | line marker, C<$eol>) has been read. This line (excluding the end of line |
651 | line marker, C<$eol>) has been read. This line (excluding the end of line |
531 | marker) will be passed to the callback as second argument (C<$line>), and |
652 | marker) will be passed to the callback as second argument (C<$line>), and |
532 | the end of line marker as the third argument (C<$eol>). |
653 | the end of line marker as the third argument (C<$eol>). |
… | |
… | |
543 | Partial lines at the end of the stream will never be returned, as they are |
664 | Partial lines at the end of the stream will never be returned, as they are |
544 | not marked by the end of line marker. |
665 | not marked by the end of line marker. |
545 | |
666 | |
546 | =cut |
667 | =cut |
547 | |
668 | |
548 | sub _read_line($$) { |
669 | register_read_type line => sub { |
549 | my $cb = pop; |
670 | my ($self, $cb, $eol) = @_; |
550 | my $eol = @_ ? shift : qr|(\015?\012)|; |
|
|
551 | my $pos; |
|
|
552 | |
671 | |
|
|
672 | $eol = qr|(\015?\012)| if @_ < 3; |
553 | $eol = qr|(\Q$eol\E)| unless ref $eol; |
673 | $eol = quotemeta $eol unless ref $eol; |
554 | $eol = qr|^(.*?)($eol)|; |
674 | $eol = qr|^(.*?)($eol)|s; |
555 | |
675 | |
556 | sub { |
676 | sub { |
557 | $_[0]{rbuf} =~ s/$eol// or return; |
677 | $_[0]{rbuf} =~ s/$eol// or return; |
558 | |
678 | |
559 | $cb->($1, $2); |
679 | $cb->($_[0], $1, $2); |
560 | 1 |
680 | 1 |
561 | } |
681 | } |
562 | } |
682 | }; |
563 | |
683 | |
|
|
684 | # compatibility with older API |
564 | sub push_read_line { |
685 | sub push_read_line { |
565 | my $self = shift; |
686 | my $self = shift; |
566 | |
|
|
567 | $self->push_read (&_read_line); |
687 | $self->push_read (line => @_); |
568 | } |
688 | } |
569 | |
689 | |
570 | sub unshift_read_line { |
690 | sub unshift_read_line { |
571 | my $self = shift; |
691 | my $self = shift; |
572 | |
|
|
573 | $self->unshift_read (&_read_line); |
692 | $self->unshift_read (line => @_); |
574 | } |
693 | } |
|
|
694 | |
|
|
695 | =item netstring => $cb->($string) |
|
|
696 | |
|
|
697 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
|
|
698 | |
|
|
699 | Throws an error with C<$!> set to EBADMSG on format violations. |
|
|
700 | |
|
|
701 | =cut |
|
|
702 | |
|
|
703 | register_read_type netstring => sub { |
|
|
704 | my ($self, $cb) = @_; |
|
|
705 | |
|
|
706 | sub { |
|
|
707 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
|
|
708 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
|
|
709 | $! = &Errno::EBADMSG; |
|
|
710 | $self->error; |
|
|
711 | } |
|
|
712 | return; |
|
|
713 | } |
|
|
714 | |
|
|
715 | my $len = $1; |
|
|
716 | |
|
|
717 | $self->unshift_read (chunk => $len, sub { |
|
|
718 | my $string = $_[1]; |
|
|
719 | $_[0]->unshift_read (chunk => 1, sub { |
|
|
720 | if ($_[1] eq ",") { |
|
|
721 | $cb->($_[0], $string); |
|
|
722 | } else { |
|
|
723 | $! = &Errno::EBADMSG; |
|
|
724 | $self->error; |
|
|
725 | } |
|
|
726 | }); |
|
|
727 | }); |
|
|
728 | |
|
|
729 | 1 |
|
|
730 | } |
|
|
731 | }; |
575 | |
732 | |
576 | =back |
733 | =back |
577 | |
734 | |
|
|
735 | =item AnyEvent::Handle::register_read_type type => $coderef->($self, $cb, @args) |
|
|
736 | |
|
|
737 | This function (not method) lets you add your own types to C<push_read>. |
|
|
738 | |
|
|
739 | Whenever the given C<type> is used, C<push_read> will invoke the code |
|
|
740 | reference with the handle object, the callback and the remaining |
|
|
741 | arguments. |
|
|
742 | |
|
|
743 | The code reference is supposed to return a callback (usually a closure) |
|
|
744 | that works as a plain read callback (see C<< ->push_read ($cb) >>). |
|
|
745 | |
|
|
746 | It should invoke the passed callback when it is done reading (remember to |
|
|
747 | pass C<$self> as first argument as all other callbacks do that). |
|
|
748 | |
|
|
749 | Note that this is a function, and all types registered this way will be |
|
|
750 | global, so try to use unique names. |
|
|
751 | |
|
|
752 | For examples, see the source of this module (F<perldoc -m AnyEvent::Handle>, |
|
|
753 | search for C<register_read_type>)). |
|
|
754 | |
|
|
755 | =item $handle->stop_read |
|
|
756 | |
|
|
757 | =item $handle->start_read |
|
|
758 | |
|
|
759 | In rare cases you actually do not want to read anything from the |
|
|
760 | socket. In this case you can call C<stop_read>. Neither C<on_read> no |
|
|
761 | any queued callbacks will be executed then. To start reading again, call |
|
|
762 | C<start_read>. |
|
|
763 | |
|
|
764 | =cut |
|
|
765 | |
|
|
766 | sub stop_read { |
|
|
767 | my ($self) = @_; |
|
|
768 | |
|
|
769 | delete $self->{rw}; |
|
|
770 | } |
|
|
771 | |
|
|
772 | sub start_read { |
|
|
773 | my ($self) = @_; |
|
|
774 | |
|
|
775 | unless ($self->{rw} || $self->{eof}) { |
|
|
776 | Scalar::Util::weaken $self; |
|
|
777 | |
|
|
778 | $self->{rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
|
|
779 | my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; |
|
|
780 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
|
|
781 | |
|
|
782 | if ($len > 0) { |
|
|
783 | $self->{filter_r} |
|
|
784 | ? $self->{filter_r}->($self, $rbuf) |
|
|
785 | : $self->_drain_rbuf; |
|
|
786 | |
|
|
787 | } elsif (defined $len) { |
|
|
788 | delete $self->{rw}; |
|
|
789 | $self->{eof} = 1; |
|
|
790 | $self->_drain_rbuf; |
|
|
791 | |
|
|
792 | } elsif ($! != EAGAIN && $! != EINTR && $! != &AnyEvent::Util::WSAWOULDBLOCK) { |
|
|
793 | return $self->error; |
|
|
794 | } |
|
|
795 | }); |
|
|
796 | } |
|
|
797 | } |
|
|
798 | |
|
|
799 | sub _dotls { |
|
|
800 | my ($self) = @_; |
|
|
801 | |
|
|
802 | if (length $self->{tls_wbuf}) { |
|
|
803 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{tls_wbuf})) > 0) { |
|
|
804 | substr $self->{tls_wbuf}, 0, $len, ""; |
|
|
805 | } |
|
|
806 | } |
|
|
807 | |
|
|
808 | if (defined (my $buf = Net::SSLeay::BIO_read ($self->{tls_wbio}))) { |
|
|
809 | $self->{wbuf} .= $buf; |
|
|
810 | $self->_drain_wbuf; |
|
|
811 | } |
|
|
812 | |
|
|
813 | while (defined (my $buf = Net::SSLeay::read ($self->{tls}))) { |
|
|
814 | $self->{rbuf} .= $buf; |
|
|
815 | $self->_drain_rbuf; |
|
|
816 | } |
|
|
817 | |
|
|
818 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
|
|
819 | |
|
|
820 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
|
|
821 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
|
|
822 | $self->error; |
|
|
823 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
|
|
824 | $! = &Errno::EIO; |
|
|
825 | $self->error; |
|
|
826 | } |
|
|
827 | |
|
|
828 | # all others are fine for our purposes |
|
|
829 | } |
|
|
830 | } |
|
|
831 | |
|
|
832 | =item $handle->starttls ($tls[, $tls_ctx]) |
|
|
833 | |
|
|
834 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
|
|
835 | object is created, you can also do that at a later time by calling |
|
|
836 | C<starttls>. |
|
|
837 | |
|
|
838 | The first argument is the same as the C<tls> constructor argument (either |
|
|
839 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
|
|
840 | |
|
|
841 | The second argument is the optional C<Net::SSLeay::CTX> object that is |
|
|
842 | used when AnyEvent::Handle has to create its own TLS connection object. |
|
|
843 | |
|
|
844 | =cut |
|
|
845 | |
|
|
846 | # TODO: maybe document... |
|
|
847 | sub starttls { |
|
|
848 | my ($self, $ssl, $ctx) = @_; |
|
|
849 | |
|
|
850 | $self->stoptls; |
|
|
851 | |
|
|
852 | if ($ssl eq "accept") { |
|
|
853 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
|
|
854 | Net::SSLeay::set_accept_state ($ssl); |
|
|
855 | } elsif ($ssl eq "connect") { |
|
|
856 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
|
|
857 | Net::SSLeay::set_connect_state ($ssl); |
|
|
858 | } |
|
|
859 | |
|
|
860 | $self->{tls} = $ssl; |
|
|
861 | |
|
|
862 | # basically, this is deep magic (because SSL_read should have the same issues) |
|
|
863 | # but the openssl maintainers basically said: "trust us, it just works". |
|
|
864 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
|
|
865 | # and mismaintained ssleay-module doesn't even offer them). |
|
|
866 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
|
|
867 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
|
|
868 | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
|
|
869 | | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
|
|
870 | |
|
|
871 | $self->{tls_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
|
|
872 | $self->{tls_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
|
|
873 | |
|
|
874 | Net::SSLeay::set_bio ($ssl, $self->{tls_rbio}, $self->{tls_wbio}); |
|
|
875 | |
|
|
876 | $self->{filter_w} = sub { |
|
|
877 | $_[0]{tls_wbuf} .= ${$_[1]}; |
|
|
878 | &_dotls; |
|
|
879 | }; |
|
|
880 | $self->{filter_r} = sub { |
|
|
881 | Net::SSLeay::BIO_write ($_[0]{tls_rbio}, ${$_[1]}); |
|
|
882 | &_dotls; |
|
|
883 | }; |
|
|
884 | } |
|
|
885 | |
|
|
886 | =item $handle->stoptls |
|
|
887 | |
|
|
888 | Destroys the SSL connection, if any. Partial read or write data will be |
|
|
889 | lost. |
|
|
890 | |
|
|
891 | =cut |
|
|
892 | |
|
|
893 | sub stoptls { |
|
|
894 | my ($self) = @_; |
|
|
895 | |
|
|
896 | Net::SSLeay::free (delete $self->{tls}) if $self->{tls}; |
|
|
897 | delete $self->{tls_rbio}; |
|
|
898 | delete $self->{tls_wbio}; |
|
|
899 | delete $self->{tls_wbuf}; |
|
|
900 | delete $self->{filter_r}; |
|
|
901 | delete $self->{filter_w}; |
|
|
902 | } |
|
|
903 | |
|
|
904 | sub DESTROY { |
|
|
905 | my $self = shift; |
|
|
906 | |
|
|
907 | $self->stoptls; |
|
|
908 | } |
|
|
909 | |
|
|
910 | =item AnyEvent::Handle::TLS_CTX |
|
|
911 | |
|
|
912 | This function creates and returns the Net::SSLeay::CTX object used by |
|
|
913 | default for TLS mode. |
|
|
914 | |
|
|
915 | The context is created like this: |
|
|
916 | |
|
|
917 | Net::SSLeay::load_error_strings; |
|
|
918 | Net::SSLeay::SSLeay_add_ssl_algorithms; |
|
|
919 | Net::SSLeay::randomize; |
|
|
920 | |
|
|
921 | my $CTX = Net::SSLeay::CTX_new; |
|
|
922 | |
|
|
923 | Net::SSLeay::CTX_set_options $CTX, Net::SSLeay::OP_ALL |
|
|
924 | |
|
|
925 | =cut |
|
|
926 | |
|
|
927 | our $TLS_CTX; |
|
|
928 | |
|
|
929 | sub TLS_CTX() { |
|
|
930 | $TLS_CTX || do { |
|
|
931 | require Net::SSLeay; |
|
|
932 | |
|
|
933 | Net::SSLeay::load_error_strings (); |
|
|
934 | Net::SSLeay::SSLeay_add_ssl_algorithms (); |
|
|
935 | Net::SSLeay::randomize (); |
|
|
936 | |
|
|
937 | $TLS_CTX = Net::SSLeay::CTX_new (); |
|
|
938 | |
|
|
939 | Net::SSLeay::CTX_set_options ($TLS_CTX, Net::SSLeay::OP_ALL ()); |
|
|
940 | |
|
|
941 | $TLS_CTX |
|
|
942 | } |
|
|
943 | } |
|
|
944 | |
|
|
945 | =back |
|
|
946 | |
578 | =head1 AUTHOR |
947 | =head1 AUTHOR |
579 | |
948 | |
580 | Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. |
949 | Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. |
581 | |
950 | |
582 | =cut |
951 | =cut |