1 | package AnyEvent::Handle; |
|
|
2 | |
|
|
3 | no warnings; |
|
|
4 | use strict; |
|
|
5 | |
|
|
6 | use AnyEvent (); |
|
|
7 | use AnyEvent::Util (); |
|
|
8 | use Scalar::Util (); |
|
|
9 | use Carp (); |
|
|
10 | use Fcntl (); |
|
|
11 | use Errno qw/EAGAIN EINTR/; |
|
|
12 | |
|
|
13 | =head1 NAME |
1 | =head1 NAME |
14 | |
2 | |
15 | AnyEvent::Handle - non-blocking I/O on filehandles via AnyEvent |
3 | AnyEvent::Handle - non-blocking I/O on streaming handles via AnyEvent |
16 | |
|
|
17 | =cut |
|
|
18 | |
|
|
19 | our $VERSION = '0.02'; |
|
|
20 | |
4 | |
21 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
22 | |
6 | |
23 | use AnyEvent; |
7 | use AnyEvent; |
24 | use AnyEvent::Handle; |
8 | use AnyEvent::Handle; |
25 | |
9 | |
26 | my $cv = AnyEvent->condvar; |
10 | my $cv = AnyEvent->condvar; |
27 | |
11 | |
28 | my $ae_fh = AnyEvent::Handle->new (fh => \*STDIN); |
12 | my $hdl; $hdl = new AnyEvent::Handle |
29 | |
|
|
30 | #TODO |
|
|
31 | |
|
|
32 | # or use the constructor to pass the callback: |
|
|
33 | |
|
|
34 | my $ae_fh2 = |
|
|
35 | AnyEvent::Handle->new ( |
|
|
36 | fh => \*STDIN, |
13 | fh => \*STDIN, |
37 | on_eof => sub { |
14 | on_error => sub { |
38 | $cv->broadcast; |
15 | my ($hdl, $fatal, $msg) = @_; |
39 | }, |
16 | warn "got error $msg\n"; |
40 | #TODO |
17 | $hdl->destroy; |
|
|
18 | $cv->send; |
41 | ); |
19 | }; |
42 | |
20 | |
43 | $cv->wait; |
21 | # send some request line |
|
|
22 | $hdl->push_write ("getinfo\015\012"); |
|
|
23 | |
|
|
24 | # read the response line |
|
|
25 | $hdl->push_read (line => sub { |
|
|
26 | my ($hdl, $line) = @_; |
|
|
27 | warn "got line <$line>\n"; |
|
|
28 | $cv->send; |
|
|
29 | }); |
|
|
30 | |
|
|
31 | $cv->recv; |
44 | |
32 | |
45 | =head1 DESCRIPTION |
33 | =head1 DESCRIPTION |
46 | |
34 | |
47 | This module is a helper module to make it easier to do event-based I/O on |
35 | This 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 |
36 | stream-based filehandles (sockets, pipes, and other stream things). |
49 | non-blocking resolves and connects). |
|
|
50 | |
37 | |
|
|
38 | The L<AnyEvent::Intro> tutorial contains some well-documented |
|
|
39 | AnyEvent::Handle examples. |
|
|
40 | |
51 | In the following, when the documentation refers to of "bytes" then this |
41 | In the following, where the documentation refers to "bytes", it means |
52 | means characters. As sysread and syswrite are used for all I/O, their |
42 | characters. As sysread and syswrite are used for all I/O, their |
53 | treatment of characters applies to this module as well. |
43 | treatment of characters applies to this module as well. |
|
|
44 | |
|
|
45 | At the very minimum, you should specify C<fh> or C<connect>, and the |
|
|
46 | C<on_error> callback. |
54 | |
47 | |
55 | All callbacks will be invoked with the handle object as their first |
48 | All callbacks will be invoked with the handle object as their first |
56 | argument. |
49 | argument. |
57 | |
50 | |
|
|
51 | =cut |
|
|
52 | |
|
|
53 | package AnyEvent::Handle; |
|
|
54 | |
|
|
55 | use Scalar::Util (); |
|
|
56 | use List::Util (); |
|
|
57 | use Carp (); |
|
|
58 | use Errno qw(EAGAIN EINTR); |
|
|
59 | |
|
|
60 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
|
|
61 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
|
|
62 | |
|
|
63 | our $VERSION = $AnyEvent::VERSION; |
|
|
64 | |
|
|
65 | sub _load_func($) { |
|
|
66 | my $func = $_[0]; |
|
|
67 | |
|
|
68 | unless (defined &$func) { |
|
|
69 | my $pkg = $func; |
|
|
70 | do { |
|
|
71 | $pkg =~ s/::[^:]+$// |
|
|
72 | or return; |
|
|
73 | eval "require $pkg"; |
|
|
74 | } until defined &$func; |
|
|
75 | } |
|
|
76 | |
|
|
77 | \&$func |
|
|
78 | } |
|
|
79 | |
58 | =head1 METHODS |
80 | =head1 METHODS |
59 | |
81 | |
60 | =over 4 |
82 | =over 4 |
61 | |
83 | |
62 | =item B<new (%args)> |
84 | =item $handle = B<new> AnyEvent::Handle fh => $filehandle, key => value... |
63 | |
85 | |
64 | The constructor supports these arguments (all as key => value pairs). |
86 | The constructor supports these arguments (all as C<< key => value >> pairs). |
65 | |
87 | |
66 | =over 4 |
88 | =over 4 |
67 | |
89 | |
68 | =item fh => $filehandle [MANDATORY] |
90 | =item fh => $filehandle [C<fh> or C<connect> MANDATORY] |
69 | |
91 | |
70 | The filehandle this L<AnyEvent::Handle> object will operate on. |
92 | The filehandle this L<AnyEvent::Handle> object will operate on. |
71 | |
|
|
72 | NOTE: The filehandle will be set to non-blocking (using |
93 | NOTE: The filehandle will be set to non-blocking mode (using |
73 | AnyEvent::Util::fh_nonblocking). |
94 | C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in |
|
|
95 | that mode. |
74 | |
96 | |
75 | =item on_eof => $cb->($self) [MANDATORY] |
97 | =item connect => [$host, $service] [C<fh> or C<connect> MANDATORY] |
76 | |
98 | |
77 | Set the callback to be called on EOF. |
99 | Try to connect to the specified host and service (port), using |
|
|
100 | C<AnyEvent::Socket::tcp_connect>. The C<$host> additionally becomes the |
|
|
101 | default C<peername>. |
78 | |
102 | |
|
|
103 | You have to specify either this parameter, or C<fh>, above. |
|
|
104 | |
|
|
105 | It is possible to push requests on the read and write queues, and modify |
|
|
106 | properties of the stream, even while AnyEvent::Handle is connecting. |
|
|
107 | |
|
|
108 | When this parameter is specified, then the C<on_prepare>, |
|
|
109 | C<on_connect_error> and C<on_connect> callbacks will be called under the |
|
|
110 | appropriate circumstances: |
|
|
111 | |
|
|
112 | =over 4 |
|
|
113 | |
79 | =item on_error => $cb->($self) |
114 | =item on_prepare => $cb->($handle) |
80 | |
115 | |
|
|
116 | This (rarely used) callback is called before a new connection is |
|
|
117 | attempted, but after the file handle has been created. It could be used to |
|
|
118 | prepare the file handle with parameters required for the actual connect |
|
|
119 | (as opposed to settings that can be changed when the connection is already |
|
|
120 | established). |
|
|
121 | |
|
|
122 | The return value of this callback should be the connect timeout value in |
|
|
123 | seconds (or C<0>, or C<undef>, or the empty list, to indicate that the |
|
|
124 | default timeout is to be used). |
|
|
125 | |
|
|
126 | =item on_connect => $cb->($handle, $host, $port, $retry->()) |
|
|
127 | |
|
|
128 | This callback is called when a connection has been successfully established. |
|
|
129 | |
|
|
130 | The peer's numeric host and port (the socket peername) are passed as |
|
|
131 | parameters, together with a retry callback. |
|
|
132 | |
|
|
133 | If, for some reason, the handle is not acceptable, calling C<$retry> |
|
|
134 | will continue with the next connection target (in case of multi-homed |
|
|
135 | hosts or SRV records there can be multiple connection endpoints). At the |
|
|
136 | time it is called the read and write queues, eof status, tls status and |
|
|
137 | similar properties of the handle will have been reset. |
|
|
138 | |
|
|
139 | In most cases, you should ignore the C<$retry> parameter. |
|
|
140 | |
|
|
141 | =item on_connect_error => $cb->($handle, $message) |
|
|
142 | |
|
|
143 | This callback is called when the connection could not be |
|
|
144 | established. C<$!> will contain the relevant error code, and C<$message> a |
|
|
145 | message describing it (usually the same as C<"$!">). |
|
|
146 | |
|
|
147 | If this callback isn't specified, then C<on_error> will be called with a |
|
|
148 | fatal error instead. |
|
|
149 | |
|
|
150 | =back |
|
|
151 | |
|
|
152 | =item on_error => $cb->($handle, $fatal, $message) |
|
|
153 | |
81 | This is the fatal error callback, that is called when, well, a fatal error |
154 | This is the error callback, which is called when, well, some error |
82 | ocurs, such as not being able to resolve the hostname, failure to connect |
155 | occured, such as not being able to resolve the hostname, failure to |
83 | or a read error. |
156 | connect, or a read error. |
84 | |
157 | |
85 | The object will not be in a usable state when this callback has been |
158 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
86 | called. |
159 | fatal errors the handle object will be destroyed (by a call to C<< -> |
|
|
160 | destroy >>) after invoking the error callback (which means you are free to |
|
|
161 | examine the handle object). Examples of fatal errors are an EOF condition |
|
|
162 | with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors. In |
|
|
163 | cases where the other side can close the connection at will, it is |
|
|
164 | often easiest to not report C<EPIPE> errors in this callback. |
87 | |
165 | |
|
|
166 | AnyEvent::Handle tries to find an appropriate error code for you to check |
|
|
167 | against, but in some cases (TLS errors), this does not work well. It is |
|
|
168 | recommended to always output the C<$message> argument in human-readable |
|
|
169 | error messages (it's usually the same as C<"$!">). |
|
|
170 | |
|
|
171 | Non-fatal errors can be retried by returning, but it is recommended |
|
|
172 | to simply ignore this parameter and instead abondon the handle object |
|
|
173 | when this callback is invoked. Examples of non-fatal errors are timeouts |
|
|
174 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
|
|
175 | |
88 | On callback entrance, the value of C<$!> contains the operating system |
176 | On entry to the callback, the value of C<$!> contains the operating |
89 | error (or C<ENOSPC> or C<EPIPE>). |
177 | system error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or |
|
|
178 | C<EPROTO>). |
90 | |
179 | |
91 | While not mandatory, it is I<highly> recommended to set this callback, as |
180 | While not mandatory, it is I<highly> recommended to set this callback, as |
92 | you will not be notified of errors otherwise. The default simply calls |
181 | you will not be notified of errors otherwise. The default just calls |
93 | die. |
182 | C<croak>. |
94 | |
183 | |
95 | =item on_read => $cb->($self) |
184 | =item on_read => $cb->($handle) |
96 | |
185 | |
97 | This sets the default read callback, which is called when data arrives |
186 | This sets the default read callback, which is called when data arrives |
98 | and no read request is in the queue. |
187 | and no read request is in the queue (unlike read queue callbacks, this |
|
|
188 | callback will only be called when at least one octet of data is in the |
|
|
189 | read buffer). |
99 | |
190 | |
100 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
191 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
101 | method or acces sthe C<$self->{rbuf}> member directly. |
192 | method or access the C<< $handle->{rbuf} >> member directly. Note that you |
|
|
193 | must not enlarge or modify the read buffer, you can only remove data at |
|
|
194 | the beginning from it. |
102 | |
195 | |
|
|
196 | You can also call C<< ->push_read (...) >> or any other function that |
|
|
197 | modifies the read queue. Or do both. Or ... |
|
|
198 | |
103 | When an EOF condition is detected then AnyEvent::Handle will first try to |
199 | When an EOF condition is detected, AnyEvent::Handle will first try to |
104 | feed all the remaining data to the queued callbacks and C<on_read> before |
200 | feed all the remaining data to the queued callbacks and C<on_read> before |
105 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
201 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
106 | error will be raised (with C<$!> set to C<EPIPE>). |
202 | error will be raised (with C<$!> set to C<EPIPE>). |
107 | |
203 | |
|
|
204 | Note that, unlike requests in the read queue, an C<on_read> callback |
|
|
205 | doesn't mean you I<require> some data: if there is an EOF and there |
|
|
206 | are outstanding read requests then an error will be flagged. With an |
|
|
207 | C<on_read> callback, the C<on_eof> callback will be invoked. |
|
|
208 | |
|
|
209 | =item on_eof => $cb->($handle) |
|
|
210 | |
|
|
211 | Set the callback to be called when an end-of-file condition is detected, |
|
|
212 | i.e. in the case of a socket, when the other side has closed the |
|
|
213 | connection cleanly, and there are no outstanding read requests in the |
|
|
214 | queue (if there are read requests, then an EOF counts as an unexpected |
|
|
215 | connection close and will be flagged as an error). |
|
|
216 | |
|
|
217 | For sockets, this just means that the other side has stopped sending data, |
|
|
218 | you can still try to write data, and, in fact, one can return from the EOF |
|
|
219 | callback and continue writing data, as only the read part has been shut |
|
|
220 | down. |
|
|
221 | |
|
|
222 | If an EOF condition has been detected but no C<on_eof> callback has been |
|
|
223 | set, then a fatal error will be raised with C<$!> set to <0>. |
|
|
224 | |
108 | =item on_drain => $cb->() |
225 | =item on_drain => $cb->($handle) |
109 | |
226 | |
110 | This sets the callback that is called when the write buffer becomes empty |
227 | This sets the callback that is called when the write buffer becomes empty |
111 | (or when the callback is set and the buffer is empty already). |
228 | (or immediately if the buffer is empty already). |
112 | |
229 | |
113 | To append to the write buffer, use the C<< ->push_write >> method. |
230 | To append to the write buffer, use the C<< ->push_write >> method. |
|
|
231 | |
|
|
232 | This callback is useful when you don't want to put all of your write data |
|
|
233 | into the queue at once, for example, when you want to write the contents |
|
|
234 | of some file to the socket you might not want to read the whole file into |
|
|
235 | memory and push it into the queue, but instead only read more data from |
|
|
236 | the file when the write queue becomes empty. |
|
|
237 | |
|
|
238 | =item timeout => $fractional_seconds |
|
|
239 | |
|
|
240 | =item rtimeout => $fractional_seconds |
|
|
241 | |
|
|
242 | =item wtimeout => $fractional_seconds |
|
|
243 | |
|
|
244 | If non-zero, then these enables an "inactivity" timeout: whenever this |
|
|
245 | many seconds pass without a successful read or write on the underlying |
|
|
246 | file handle (or a call to C<timeout_reset>), the C<on_timeout> callback |
|
|
247 | will be invoked (and if that one is missing, a non-fatal C<ETIMEDOUT> |
|
|
248 | error will be raised). |
|
|
249 | |
|
|
250 | There are three variants of the timeouts that work independently |
|
|
251 | of each other, for both read and write, just read, and just write: |
|
|
252 | C<timeout>, C<rtimeout> and C<wtimeout>, with corresponding callbacks |
|
|
253 | C<on_timeout>, C<on_rtimeout> and C<on_wtimeout>, and reset functions |
|
|
254 | C<timeout_reset>, C<rtimeout_reset>, and C<wtimeout_reset>. |
|
|
255 | |
|
|
256 | Note that timeout processing is active even when you do not have |
|
|
257 | any outstanding read or write requests: If you plan to keep the connection |
|
|
258 | idle then you should disable the timeout temporarily or ignore the timeout |
|
|
259 | in the C<on_timeout> callback, in which case AnyEvent::Handle will simply |
|
|
260 | restart the timeout. |
|
|
261 | |
|
|
262 | Zero (the default) disables this timeout. |
|
|
263 | |
|
|
264 | =item on_timeout => $cb->($handle) |
|
|
265 | |
|
|
266 | Called whenever the inactivity timeout passes. If you return from this |
|
|
267 | callback, then the timeout will be reset as if some activity had happened, |
|
|
268 | so this condition is not fatal in any way. |
114 | |
269 | |
115 | =item rbuf_max => <bytes> |
270 | =item rbuf_max => <bytes> |
116 | |
271 | |
117 | If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>) |
272 | If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>) |
118 | when the read buffer ever (strictly) exceeds this size. This is useful to |
273 | when the read buffer ever (strictly) exceeds this size. This is useful to |
119 | avoid denial-of-service attacks. |
274 | avoid some forms of denial-of-service attacks. |
120 | |
275 | |
121 | For example, a server accepting connections from untrusted sources should |
276 | For example, a server accepting connections from untrusted sources should |
122 | be configured to accept only so-and-so much data that it cannot act on |
277 | be configured to accept only so-and-so much data that it cannot act on |
123 | (for example, when expecting a line, an attacker could send an unlimited |
278 | (for example, when expecting a line, an attacker could send an unlimited |
124 | amount of data without a callback ever being called as long as the line |
279 | amount of data without a callback ever being called as long as the line |
125 | isn't finished). |
280 | isn't finished). |
126 | |
281 | |
|
|
282 | =item autocork => <boolean> |
|
|
283 | |
|
|
284 | When disabled (the default), C<push_write> will try to immediately |
|
|
285 | write the data to the handle if possible. This avoids having to register |
|
|
286 | a write watcher and wait for the next event loop iteration, but can |
|
|
287 | be inefficient if you write multiple small chunks (on the wire, this |
|
|
288 | disadvantage is usually avoided by your kernel's nagle algorithm, see |
|
|
289 | C<no_delay>, but this option can save costly syscalls). |
|
|
290 | |
|
|
291 | When enabled, writes will always be queued till the next event loop |
|
|
292 | iteration. This is efficient when you do many small writes per iteration, |
|
|
293 | but less efficient when you do a single write only per iteration (or when |
|
|
294 | the write buffer often is full). It also increases write latency. |
|
|
295 | |
|
|
296 | =item no_delay => <boolean> |
|
|
297 | |
|
|
298 | When doing small writes on sockets, your operating system kernel might |
|
|
299 | wait a bit for more data before actually sending it out. This is called |
|
|
300 | the Nagle algorithm, and usually it is beneficial. |
|
|
301 | |
|
|
302 | In some situations you want as low a delay as possible, which can be |
|
|
303 | accomplishd by setting this option to a true value. |
|
|
304 | |
|
|
305 | The default is your operating system's default behaviour (most likely |
|
|
306 | enabled). This option explicitly enables or disables it, if possible. |
|
|
307 | |
|
|
308 | =item keepalive => <boolean> |
|
|
309 | |
|
|
310 | Enables (default disable) the SO_KEEPALIVE option on the stream socket: |
|
|
311 | normally, TCP connections have no time-out once established, so TCP |
|
|
312 | connections, once established, can stay alive forever even when the other |
|
|
313 | side has long gone. TCP keepalives are a cheap way to take down long-lived |
|
|
314 | TCP connections when the other side becomes unreachable. While the default |
|
|
315 | is OS-dependent, TCP keepalives usually kick in after around two hours, |
|
|
316 | and, if the other side doesn't reply, take down the TCP connection some 10 |
|
|
317 | to 15 minutes later. |
|
|
318 | |
|
|
319 | It is harmless to specify this option for file handles that do not support |
|
|
320 | keepalives, and enabling it on connections that are potentially long-lived |
|
|
321 | is usually a good idea. |
|
|
322 | |
|
|
323 | =item oobinline => <boolean> |
|
|
324 | |
|
|
325 | BSD majorly fucked up the implementation of TCP urgent data. The result |
|
|
326 | is that almost no OS implements TCP according to the specs, and every OS |
|
|
327 | implements it slightly differently. |
|
|
328 | |
|
|
329 | If you want to handle TCP urgent data, then setting this flag (the default |
|
|
330 | is enabled) gives you the most portable way of getting urgent data, by |
|
|
331 | putting it into the stream. |
|
|
332 | |
|
|
333 | Since BSD emulation of OOB data on top of TCP's urgent data can have |
|
|
334 | security implications, AnyEvent::Handle sets this flag automatically |
|
|
335 | unless explicitly specified. Note that setting this flag after |
|
|
336 | establishing a connection I<may> be a bit too late (data loss could |
|
|
337 | already have occured on BSD systems), but at least it will protect you |
|
|
338 | from most attacks. |
|
|
339 | |
127 | =item read_size => <bytes> |
340 | =item read_size => <bytes> |
128 | |
341 | |
129 | The default read block size (the amount of bytes this module will try to read |
342 | The default read block size (the number of bytes this module will |
130 | on each [loop iteration). Default: C<4096>. |
343 | try to read during each loop iteration, which affects memory |
|
|
344 | requirements). Default: C<8192>. |
131 | |
345 | |
132 | =item low_water_mark => <bytes> |
346 | =item low_water_mark => <bytes> |
133 | |
347 | |
134 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
348 | Sets the number of bytes (default: C<0>) that make up an "empty" write |
135 | buffer: If the write reaches this size or gets even samller it is |
349 | buffer: If the buffer reaches this size or gets even samller it is |
136 | considered empty. |
350 | considered empty. |
|
|
351 | |
|
|
352 | Sometimes it can be beneficial (for performance reasons) to add data to |
|
|
353 | the write buffer before it is fully drained, but this is a rare case, as |
|
|
354 | the operating system kernel usually buffers data as well, so the default |
|
|
355 | is good in almost all cases. |
|
|
356 | |
|
|
357 | =item linger => <seconds> |
|
|
358 | |
|
|
359 | If this is non-zero (default: C<3600>), the destructor of the |
|
|
360 | AnyEvent::Handle object will check whether there is still outstanding |
|
|
361 | write data and will install a watcher that will write this data to the |
|
|
362 | socket. No errors will be reported (this mostly matches how the operating |
|
|
363 | system treats outstanding data at socket close time). |
|
|
364 | |
|
|
365 | This will not work for partial TLS data that could not be encoded |
|
|
366 | yet. This data will be lost. Calling the C<stoptls> method in time might |
|
|
367 | help. |
|
|
368 | |
|
|
369 | =item peername => $string |
|
|
370 | |
|
|
371 | A string used to identify the remote site - usually the DNS hostname |
|
|
372 | (I<not> IDN!) used to create the connection, rarely the IP address. |
|
|
373 | |
|
|
374 | Apart from being useful in error messages, this string is also used in TLS |
|
|
375 | peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This |
|
|
376 | verification will be skipped when C<peername> is not specified or is |
|
|
377 | C<undef>. |
|
|
378 | |
|
|
379 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
|
|
380 | |
|
|
381 | When this parameter is given, it enables TLS (SSL) mode, that means |
|
|
382 | AnyEvent will start a TLS handshake as soon as the connection has been |
|
|
383 | established and will transparently encrypt/decrypt data afterwards. |
|
|
384 | |
|
|
385 | All TLS protocol errors will be signalled as C<EPROTO>, with an |
|
|
386 | appropriate error message. |
|
|
387 | |
|
|
388 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
|
|
389 | automatically when you try to create a TLS handle): this module doesn't |
|
|
390 | have a dependency on that module, so if your module requires it, you have |
|
|
391 | to add the dependency yourself. |
|
|
392 | |
|
|
393 | Unlike TCP, TLS has a server and client side: for the TLS server side, use |
|
|
394 | C<accept>, and for the TLS client side of a connection, use C<connect> |
|
|
395 | mode. |
|
|
396 | |
|
|
397 | You can also provide your own TLS connection object, but you have |
|
|
398 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
|
|
399 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
|
|
400 | AnyEvent::Handle. Also, this module will take ownership of this connection |
|
|
401 | object. |
|
|
402 | |
|
|
403 | At some future point, AnyEvent::Handle might switch to another TLS |
|
|
404 | implementation, then the option to use your own session object will go |
|
|
405 | away. |
|
|
406 | |
|
|
407 | B<IMPORTANT:> since Net::SSLeay "objects" are really only integers, |
|
|
408 | passing in the wrong integer will lead to certain crash. This most often |
|
|
409 | happens when one uses a stylish C<< tls => 1 >> and is surprised about the |
|
|
410 | segmentation fault. |
|
|
411 | |
|
|
412 | Use the C<< ->starttls >> method if you need to start TLS negotiation later. |
|
|
413 | |
|
|
414 | =item tls_ctx => $anyevent_tls |
|
|
415 | |
|
|
416 | Use the given C<AnyEvent::TLS> object to create the new TLS connection |
|
|
417 | (unless a connection object was specified directly). If this parameter is |
|
|
418 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
|
|
419 | |
|
|
420 | Instead of an object, you can also specify a hash reference with C<< key |
|
|
421 | => value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a |
|
|
422 | new TLS context object. |
|
|
423 | |
|
|
424 | =item on_starttls => $cb->($handle, $success[, $error_message]) |
|
|
425 | |
|
|
426 | This callback will be invoked when the TLS/SSL handshake has finished. If |
|
|
427 | C<$success> is true, then the TLS handshake succeeded, otherwise it failed |
|
|
428 | (C<on_stoptls> will not be called in this case). |
|
|
429 | |
|
|
430 | The session in C<< $handle->{tls} >> can still be examined in this |
|
|
431 | callback, even when the handshake was not successful. |
|
|
432 | |
|
|
433 | TLS handshake failures will not cause C<on_error> to be invoked when this |
|
|
434 | callback is in effect, instead, the error message will be passed to C<on_starttls>. |
|
|
435 | |
|
|
436 | Without this callback, handshake failures lead to C<on_error> being |
|
|
437 | called as usual. |
|
|
438 | |
|
|
439 | Note that you cannot just call C<starttls> again in this callback. If you |
|
|
440 | need to do that, start an zero-second timer instead whose callback can |
|
|
441 | then call C<< ->starttls >> again. |
|
|
442 | |
|
|
443 | =item on_stoptls => $cb->($handle) |
|
|
444 | |
|
|
445 | When a SSLv3/TLS shutdown/close notify/EOF is detected and this callback is |
|
|
446 | set, then it will be invoked after freeing the TLS session. If it is not, |
|
|
447 | then a TLS shutdown condition will be treated like a normal EOF condition |
|
|
448 | on the handle. |
|
|
449 | |
|
|
450 | The session in C<< $handle->{tls} >> can still be examined in this |
|
|
451 | callback. |
|
|
452 | |
|
|
453 | This callback will only be called on TLS shutdowns, not when the |
|
|
454 | underlying handle signals EOF. |
|
|
455 | |
|
|
456 | =item json => JSON or JSON::XS object |
|
|
457 | |
|
|
458 | This is the json coder object used by the C<json> read and write types. |
|
|
459 | |
|
|
460 | If you don't supply it, then AnyEvent::Handle will create and use a |
|
|
461 | suitable one (on demand), which will write and expect UTF-8 encoded JSON |
|
|
462 | texts. |
|
|
463 | |
|
|
464 | Note that you are responsible to depend on the JSON module if you want to |
|
|
465 | use this functionality, as AnyEvent does not have a dependency itself. |
137 | |
466 | |
138 | =back |
467 | =back |
139 | |
468 | |
140 | =cut |
469 | =cut |
141 | |
470 | |
142 | sub new { |
471 | sub new { |
143 | my $class = shift; |
472 | my $class = shift; |
144 | |
|
|
145 | my $self = bless { @_ }, $class; |
473 | my $self = bless { @_ }, $class; |
146 | |
474 | |
147 | $self->{fh} or Carp::croak "mandatory argument fh is missing"; |
475 | if ($self->{fh}) { |
|
|
476 | $self->_start; |
|
|
477 | return unless $self->{fh}; # could be gone by now |
|
|
478 | |
|
|
479 | } elsif ($self->{connect}) { |
|
|
480 | require AnyEvent::Socket; |
|
|
481 | |
|
|
482 | $self->{peername} = $self->{connect}[0] |
|
|
483 | unless exists $self->{peername}; |
|
|
484 | |
|
|
485 | $self->{_skip_drain_rbuf} = 1; |
|
|
486 | |
|
|
487 | { |
|
|
488 | Scalar::Util::weaken (my $self = $self); |
|
|
489 | |
|
|
490 | $self->{_connect} = |
|
|
491 | AnyEvent::Socket::tcp_connect ( |
|
|
492 | $self->{connect}[0], |
|
|
493 | $self->{connect}[1], |
|
|
494 | sub { |
|
|
495 | my ($fh, $host, $port, $retry) = @_; |
|
|
496 | |
|
|
497 | if ($fh) { |
|
|
498 | $self->{fh} = $fh; |
|
|
499 | |
|
|
500 | delete $self->{_skip_drain_rbuf}; |
|
|
501 | $self->_start; |
|
|
502 | |
|
|
503 | $self->{on_connect} |
|
|
504 | and $self->{on_connect}($self, $host, $port, sub { |
|
|
505 | delete @$self{qw(fh _tw _rtw _wtw _ww _rw _eof _queue rbuf _wbuf tls _tls_rbuf _tls_wbuf)}; |
|
|
506 | $self->{_skip_drain_rbuf} = 1; |
|
|
507 | &$retry; |
|
|
508 | }); |
|
|
509 | |
|
|
510 | } else { |
|
|
511 | if ($self->{on_connect_error}) { |
|
|
512 | $self->{on_connect_error}($self, "$!"); |
|
|
513 | $self->destroy; |
|
|
514 | } else { |
|
|
515 | $self->_error ($!, 1); |
|
|
516 | } |
|
|
517 | } |
|
|
518 | }, |
|
|
519 | sub { |
|
|
520 | local $self->{fh} = $_[0]; |
|
|
521 | |
|
|
522 | $self->{on_prepare} |
|
|
523 | ? $self->{on_prepare}->($self) |
|
|
524 | : () |
|
|
525 | } |
|
|
526 | ); |
|
|
527 | } |
|
|
528 | |
|
|
529 | } else { |
|
|
530 | Carp::croak "AnyEvent::Handle: either an existing fh or the connect parameter must be specified"; |
|
|
531 | } |
|
|
532 | |
|
|
533 | $self |
|
|
534 | } |
|
|
535 | |
|
|
536 | sub _start { |
|
|
537 | my ($self) = @_; |
|
|
538 | |
|
|
539 | # too many clueless people try to use udp and similar sockets |
|
|
540 | # with AnyEvent::Handle, do them a favour. |
|
|
541 | my $type = getsockopt $self->{fh}, Socket::SOL_SOCKET (), Socket::SO_TYPE (); |
|
|
542 | Carp::croak "AnyEvent::Handle: only stream sockets supported, anything else will NOT work!" |
|
|
543 | if Socket::SOCK_STREAM () != (unpack "I", $type) && defined $type; |
148 | |
544 | |
149 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
545 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
150 | |
546 | |
151 | $self->on_eof ((delete $self->{on_eof} ) or Carp::croak "mandatory argument on_eof is missing"); |
547 | $self->{_activity} = |
|
|
548 | $self->{_ractivity} = |
|
|
549 | $self->{_wactivity} = AE::now; |
152 | |
550 | |
153 | $self->on_error (delete $self->{on_error}) if $self->{on_error}; |
551 | $self->timeout (delete $self->{timeout} ) if $self->{timeout}; |
|
|
552 | $self->rtimeout (delete $self->{rtimeout} ) if $self->{rtimeout}; |
|
|
553 | $self->wtimeout (delete $self->{wtimeout} ) if $self->{wtimeout}; |
|
|
554 | |
|
|
555 | $self->no_delay (delete $self->{no_delay} ) if exists $self->{no_delay} && $self->{no_delay}; |
|
|
556 | $self->keepalive (delete $self->{keepalive}) if exists $self->{keepalive} && $self->{keepalive}; |
|
|
557 | |
|
|
558 | $self->oobinline (exists $self->{oobinline} ? delete $self->{oobinline} : 1); |
|
|
559 | |
|
|
560 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}) |
|
|
561 | if $self->{tls}; |
|
|
562 | |
154 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
563 | $self->on_drain (delete $self->{on_drain} ) if $self->{on_drain}; |
155 | $self->on_read (delete $self->{on_read} ) if $self->{on_read}; |
|
|
156 | |
564 | |
157 | $self->start_read; |
565 | $self->start_read |
|
|
566 | if $self->{on_read} || @{ $self->{_queue} }; |
158 | |
567 | |
159 | $self |
568 | $self->_drain_wbuf; |
160 | } |
569 | } |
161 | |
570 | |
162 | sub _shutdown { |
|
|
163 | my ($self) = @_; |
|
|
164 | |
|
|
165 | delete $self->{rw}; |
|
|
166 | delete $self->{ww}; |
|
|
167 | delete $self->{fh}; |
|
|
168 | } |
|
|
169 | |
|
|
170 | sub error { |
571 | sub _error { |
171 | my ($self) = @_; |
572 | my ($self, $errno, $fatal, $message) = @_; |
172 | |
573 | |
173 | { |
574 | $! = $errno; |
174 | local $!; |
575 | $message ||= "$!"; |
175 | $self->_shutdown; |
|
|
176 | } |
|
|
177 | |
576 | |
178 | if ($self->{on_error}) { |
577 | if ($self->{on_error}) { |
179 | $self->{on_error}($self); |
578 | $self->{on_error}($self, $fatal, $message); |
180 | } else { |
579 | $self->destroy if $fatal; |
|
|
580 | } elsif ($self->{fh} || $self->{connect}) { |
|
|
581 | $self->destroy; |
181 | die "AnyEvent::Handle uncaught fatal error: $!"; |
582 | Carp::croak "AnyEvent::Handle uncaught error: $message"; |
182 | } |
583 | } |
183 | } |
584 | } |
184 | |
585 | |
185 | =item $fh = $handle->fh |
586 | =item $fh = $handle->fh |
186 | |
587 | |
187 | This method returns the filehandle of the L<AnyEvent::Handle> object. |
588 | This method returns the file handle used to create the L<AnyEvent::Handle> object. |
188 | |
589 | |
189 | =cut |
590 | =cut |
190 | |
591 | |
191 | sub fh { $_[0]->{fh} } |
592 | sub fh { $_[0]{fh} } |
192 | |
593 | |
193 | =item $handle->on_error ($cb) |
594 | =item $handle->on_error ($cb) |
194 | |
595 | |
195 | Replace the current C<on_error> callback (see the C<on_error> constructor argument). |
596 | Replace the current C<on_error> callback (see the C<on_error> constructor argument). |
196 | |
597 | |
… | |
… | |
208 | |
609 | |
209 | sub on_eof { |
610 | sub on_eof { |
210 | $_[0]{on_eof} = $_[1]; |
611 | $_[0]{on_eof} = $_[1]; |
211 | } |
612 | } |
212 | |
613 | |
|
|
614 | =item $handle->on_timeout ($cb) |
|
|
615 | |
|
|
616 | =item $handle->on_rtimeout ($cb) |
|
|
617 | |
|
|
618 | =item $handle->on_wtimeout ($cb) |
|
|
619 | |
|
|
620 | Replace the current C<on_timeout>, C<on_rtimeout> or C<on_wtimeout> |
|
|
621 | callback, or disables the callback (but not the timeout) if C<$cb> = |
|
|
622 | C<undef>. See the C<timeout> constructor argument and method. |
|
|
623 | |
|
|
624 | =cut |
|
|
625 | |
|
|
626 | # see below |
|
|
627 | |
|
|
628 | =item $handle->autocork ($boolean) |
|
|
629 | |
|
|
630 | Enables or disables the current autocork behaviour (see C<autocork> |
|
|
631 | constructor argument). Changes will only take effect on the next write. |
|
|
632 | |
|
|
633 | =cut |
|
|
634 | |
|
|
635 | sub autocork { |
|
|
636 | $_[0]{autocork} = $_[1]; |
|
|
637 | } |
|
|
638 | |
|
|
639 | =item $handle->no_delay ($boolean) |
|
|
640 | |
|
|
641 | Enables or disables the C<no_delay> setting (see constructor argument of |
|
|
642 | the same name for details). |
|
|
643 | |
|
|
644 | =cut |
|
|
645 | |
|
|
646 | sub no_delay { |
|
|
647 | $_[0]{no_delay} = $_[1]; |
|
|
648 | |
|
|
649 | setsockopt $_[0]{fh}, Socket::IPPROTO_TCP (), Socket::TCP_NODELAY (), int $_[1] |
|
|
650 | if $_[0]{fh}; |
|
|
651 | } |
|
|
652 | |
|
|
653 | =item $handle->keepalive ($boolean) |
|
|
654 | |
|
|
655 | Enables or disables the C<keepalive> setting (see constructor argument of |
|
|
656 | the same name for details). |
|
|
657 | |
|
|
658 | =cut |
|
|
659 | |
|
|
660 | sub keepalive { |
|
|
661 | $_[0]{keepalive} = $_[1]; |
|
|
662 | |
|
|
663 | eval { |
|
|
664 | local $SIG{__DIE__}; |
|
|
665 | setsockopt $_[0]{fh}, Socket::SOL_SOCKET (), Socket::SO_KEEPALIVE (), int $_[1] |
|
|
666 | if $_[0]{fh}; |
|
|
667 | }; |
|
|
668 | } |
|
|
669 | |
|
|
670 | =item $handle->oobinline ($boolean) |
|
|
671 | |
|
|
672 | Enables or disables the C<oobinline> setting (see constructor argument of |
|
|
673 | the same name for details). |
|
|
674 | |
|
|
675 | =cut |
|
|
676 | |
|
|
677 | sub oobinline { |
|
|
678 | $_[0]{oobinline} = $_[1]; |
|
|
679 | |
|
|
680 | eval { |
|
|
681 | local $SIG{__DIE__}; |
|
|
682 | setsockopt $_[0]{fh}, Socket::SOL_SOCKET (), Socket::SO_OOBINLINE (), int $_[1] |
|
|
683 | if $_[0]{fh}; |
|
|
684 | }; |
|
|
685 | } |
|
|
686 | |
|
|
687 | =item $handle->keepalive ($boolean) |
|
|
688 | |
|
|
689 | Enables or disables the C<keepalive> setting (see constructor argument of |
|
|
690 | the same name for details). |
|
|
691 | |
|
|
692 | =cut |
|
|
693 | |
|
|
694 | sub keepalive { |
|
|
695 | $_[0]{keepalive} = $_[1]; |
|
|
696 | |
|
|
697 | eval { |
|
|
698 | local $SIG{__DIE__}; |
|
|
699 | setsockopt $_[0]{fh}, Socket::SOL_SOCKET (), Socket::SO_KEEPALIVE (), int $_[1] |
|
|
700 | if $_[0]{fh}; |
|
|
701 | }; |
|
|
702 | } |
|
|
703 | |
|
|
704 | =item $handle->on_starttls ($cb) |
|
|
705 | |
|
|
706 | Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument). |
|
|
707 | |
|
|
708 | =cut |
|
|
709 | |
|
|
710 | sub on_starttls { |
|
|
711 | $_[0]{on_starttls} = $_[1]; |
|
|
712 | } |
|
|
713 | |
|
|
714 | =item $handle->on_stoptls ($cb) |
|
|
715 | |
|
|
716 | Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument). |
|
|
717 | |
|
|
718 | =cut |
|
|
719 | |
|
|
720 | sub on_stoptls { |
|
|
721 | $_[0]{on_stoptls} = $_[1]; |
|
|
722 | } |
|
|
723 | |
|
|
724 | =item $handle->rbuf_max ($max_octets) |
|
|
725 | |
|
|
726 | Configures the C<rbuf_max> setting (C<undef> disables it). |
|
|
727 | |
|
|
728 | =cut |
|
|
729 | |
|
|
730 | sub rbuf_max { |
|
|
731 | $_[0]{rbuf_max} = $_[1]; |
|
|
732 | } |
|
|
733 | |
|
|
734 | ############################################################################# |
|
|
735 | |
|
|
736 | =item $handle->timeout ($seconds) |
|
|
737 | |
|
|
738 | =item $handle->rtimeout ($seconds) |
|
|
739 | |
|
|
740 | =item $handle->wtimeout ($seconds) |
|
|
741 | |
|
|
742 | Configures (or disables) the inactivity timeout. |
|
|
743 | |
|
|
744 | =item $handle->timeout_reset |
|
|
745 | |
|
|
746 | =item $handle->rtimeout_reset |
|
|
747 | |
|
|
748 | =item $handle->wtimeout_reset |
|
|
749 | |
|
|
750 | Reset the activity timeout, as if data was received or sent. |
|
|
751 | |
|
|
752 | These methods are cheap to call. |
|
|
753 | |
|
|
754 | =cut |
|
|
755 | |
|
|
756 | for my $dir ("", "r", "w") { |
|
|
757 | my $timeout = "${dir}timeout"; |
|
|
758 | my $tw = "_${dir}tw"; |
|
|
759 | my $on_timeout = "on_${dir}timeout"; |
|
|
760 | my $activity = "_${dir}activity"; |
|
|
761 | my $cb; |
|
|
762 | |
|
|
763 | *$on_timeout = sub { |
|
|
764 | $_[0]{$on_timeout} = $_[1]; |
|
|
765 | }; |
|
|
766 | |
|
|
767 | *$timeout = sub { |
|
|
768 | my ($self, $new_value) = @_; |
|
|
769 | |
|
|
770 | $self->{$timeout} = $new_value; |
|
|
771 | delete $self->{$tw}; &$cb; |
|
|
772 | }; |
|
|
773 | |
|
|
774 | *{"${dir}timeout_reset"} = sub { |
|
|
775 | $_[0]{$activity} = AE::now; |
|
|
776 | }; |
|
|
777 | |
|
|
778 | # main workhorse: |
|
|
779 | # reset the timeout watcher, as neccessary |
|
|
780 | # also check for time-outs |
|
|
781 | $cb = sub { |
|
|
782 | my ($self) = @_; |
|
|
783 | |
|
|
784 | if ($self->{$timeout} && $self->{fh}) { |
|
|
785 | my $NOW = AE::now; |
|
|
786 | |
|
|
787 | # when would the timeout trigger? |
|
|
788 | my $after = $self->{$activity} + $self->{$timeout} - $NOW; |
|
|
789 | |
|
|
790 | # now or in the past already? |
|
|
791 | if ($after <= 0) { |
|
|
792 | $self->{$activity} = $NOW; |
|
|
793 | |
|
|
794 | if ($self->{$on_timeout}) { |
|
|
795 | $self->{$on_timeout}($self); |
|
|
796 | } else { |
|
|
797 | $self->_error (Errno::ETIMEDOUT); |
|
|
798 | } |
|
|
799 | |
|
|
800 | # callback could have changed timeout value, optimise |
|
|
801 | return unless $self->{$timeout}; |
|
|
802 | |
|
|
803 | # calculate new after |
|
|
804 | $after = $self->{$timeout}; |
|
|
805 | } |
|
|
806 | |
|
|
807 | Scalar::Util::weaken $self; |
|
|
808 | return unless $self; # ->error could have destroyed $self |
|
|
809 | |
|
|
810 | $self->{$tw} ||= AE::timer $after, 0, sub { |
|
|
811 | delete $self->{$tw}; |
|
|
812 | $cb->($self); |
|
|
813 | }; |
|
|
814 | } else { |
|
|
815 | delete $self->{$tw}; |
|
|
816 | } |
|
|
817 | } |
|
|
818 | } |
|
|
819 | |
213 | ############################################################################# |
820 | ############################################################################# |
214 | |
821 | |
215 | =back |
822 | =back |
216 | |
823 | |
217 | =head2 WRITE QUEUE |
824 | =head2 WRITE QUEUE |
… | |
… | |
220 | for reading. |
827 | for reading. |
221 | |
828 | |
222 | The write queue is very simple: you can add data to its end, and |
829 | The write queue is very simple: you can add data to its end, and |
223 | AnyEvent::Handle will automatically try to get rid of it for you. |
830 | AnyEvent::Handle will automatically try to get rid of it for you. |
224 | |
831 | |
225 | When data could be writtena nd the write buffer is shorter then the low |
832 | When data could be written and the write buffer is shorter then the low |
226 | water mark, the C<on_drain> callback will be invoked. |
833 | water mark, the C<on_drain> callback will be invoked. |
227 | |
834 | |
228 | =over 4 |
835 | =over 4 |
229 | |
836 | |
230 | =item $handle->on_drain ($cb) |
837 | =item $handle->on_drain ($cb) |
231 | |
838 | |
232 | Sets the C<on_drain> callback or clears it (see the description of |
839 | Sets the C<on_drain> callback or clears it (see the description of |
233 | C<on_drain> in the constructor). |
840 | C<on_drain> in the constructor). |
234 | |
841 | |
|
|
842 | This method may invoke callbacks (and therefore the handle might be |
|
|
843 | destroyed after it returns). |
|
|
844 | |
235 | =cut |
845 | =cut |
236 | |
846 | |
237 | sub on_drain { |
847 | sub on_drain { |
238 | my ($self, $cb) = @_; |
848 | my ($self, $cb) = @_; |
239 | |
849 | |
240 | $self->{on_drain} = $cb; |
850 | $self->{on_drain} = $cb; |
241 | |
851 | |
242 | $cb->($self) |
852 | $cb->($self) |
243 | if $cb && $self->{low_water_mark} >= length $self->{wbuf}; |
853 | if $cb && $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}); |
244 | } |
854 | } |
245 | |
855 | |
246 | =item $handle->push_write ($data) |
856 | =item $handle->push_write ($data) |
247 | |
857 | |
248 | Queues the given scalar to be written. You can push as much data as you |
858 | Queues the given scalar to be written. You can push as much data as you |
249 | want (only limited by the available memory), as C<AnyEvent::Handle> |
859 | want (only limited by the available memory), as C<AnyEvent::Handle> |
250 | buffers it independently of the kernel. |
860 | buffers it independently of the kernel. |
251 | |
861 | |
252 | =cut |
862 | This method may invoke callbacks (and therefore the handle might be |
|
|
863 | destroyed after it returns). |
253 | |
864 | |
254 | sub push_write { |
865 | =cut |
|
|
866 | |
|
|
867 | sub _drain_wbuf { |
255 | my ($self, $data) = @_; |
868 | my ($self) = @_; |
256 | |
869 | |
257 | $self->{wbuf} .= $data; |
870 | if (!$self->{_ww} && length $self->{wbuf}) { |
258 | |
871 | |
259 | unless ($self->{ww}) { |
|
|
260 | Scalar::Util::weaken $self; |
872 | Scalar::Util::weaken $self; |
|
|
873 | |
261 | my $cb = sub { |
874 | my $cb = sub { |
262 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
875 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
263 | |
876 | |
264 | if ($len > 0) { |
877 | if (defined $len) { |
265 | substr $self->{wbuf}, 0, $len, ""; |
878 | substr $self->{wbuf}, 0, $len, ""; |
266 | |
879 | |
|
|
880 | $self->{_activity} = $self->{_wactivity} = AE::now; |
267 | |
881 | |
268 | $self->{on_drain}($self) |
882 | $self->{on_drain}($self) |
269 | if $self->{low_water_mark} >= length $self->{wbuf} |
883 | if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}) |
270 | && $self->{on_drain}; |
884 | && $self->{on_drain}; |
271 | |
885 | |
272 | delete $self->{ww} unless length $self->{wbuf}; |
886 | delete $self->{_ww} unless length $self->{wbuf}; |
273 | } elsif ($! != EAGAIN && $! != EINTR) { |
887 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
274 | $self->error; |
888 | $self->_error ($!, 1); |
275 | } |
889 | } |
276 | }; |
890 | }; |
277 | |
891 | |
278 | $self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb); |
892 | # try to write data immediately |
|
|
893 | $cb->() unless $self->{autocork}; |
279 | |
894 | |
280 | $cb->($self); |
895 | # if still data left in wbuf, we need to poll |
|
|
896 | $self->{_ww} = AE::io $self->{fh}, 1, $cb |
|
|
897 | if length $self->{wbuf}; |
281 | }; |
898 | }; |
282 | } |
899 | } |
|
|
900 | |
|
|
901 | our %WH; |
|
|
902 | |
|
|
903 | # deprecated |
|
|
904 | sub register_write_type($$) { |
|
|
905 | $WH{$_[0]} = $_[1]; |
|
|
906 | } |
|
|
907 | |
|
|
908 | sub push_write { |
|
|
909 | my $self = shift; |
|
|
910 | |
|
|
911 | if (@_ > 1) { |
|
|
912 | my $type = shift; |
|
|
913 | |
|
|
914 | @_ = ($WH{$type} ||= _load_func "$type\::anyevent_write_type" |
|
|
915 | or Carp::croak "unsupported/unloadable type '$type' passed to AnyEvent::Handle::push_write") |
|
|
916 | ->($self, @_); |
|
|
917 | } |
|
|
918 | |
|
|
919 | # we downgrade here to avoid hard-to-track-down bugs, |
|
|
920 | # and diagnose the problem earlier and better. |
|
|
921 | |
|
|
922 | if ($self->{tls}) { |
|
|
923 | utf8::downgrade $self->{_tls_wbuf} .= $_[0]; |
|
|
924 | &_dotls ($self) if $self->{fh}; |
|
|
925 | } else { |
|
|
926 | utf8::downgrade $self->{wbuf} .= $_[0]; |
|
|
927 | $self->_drain_wbuf if $self->{fh}; |
|
|
928 | } |
|
|
929 | } |
|
|
930 | |
|
|
931 | =item $handle->push_write (type => @args) |
|
|
932 | |
|
|
933 | Instead of formatting your data yourself, you can also let this module |
|
|
934 | do the job by specifying a type and type-specific arguments. You |
|
|
935 | can also specify the (fully qualified) name of a package, in which |
|
|
936 | case AnyEvent tries to load the package and then expects to find the |
|
|
937 | C<anyevent_write_type> function inside (see "custom write types", below). |
|
|
938 | |
|
|
939 | Predefined types are (if you have ideas for additional types, feel free to |
|
|
940 | drop by and tell us): |
|
|
941 | |
|
|
942 | =over 4 |
|
|
943 | |
|
|
944 | =item netstring => $string |
|
|
945 | |
|
|
946 | Formats the given value as netstring |
|
|
947 | (http://cr.yp.to/proto/netstrings.txt, this is not a recommendation to use them). |
|
|
948 | |
|
|
949 | =cut |
|
|
950 | |
|
|
951 | register_write_type netstring => sub { |
|
|
952 | my ($self, $string) = @_; |
|
|
953 | |
|
|
954 | (length $string) . ":$string," |
|
|
955 | }; |
|
|
956 | |
|
|
957 | =item packstring => $format, $data |
|
|
958 | |
|
|
959 | An octet string prefixed with an encoded length. The encoding C<$format> |
|
|
960 | uses the same format as a Perl C<pack> format, but must specify a single |
|
|
961 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
|
|
962 | optional C<!>, C<< < >> or C<< > >> modifier). |
|
|
963 | |
|
|
964 | =cut |
|
|
965 | |
|
|
966 | register_write_type packstring => sub { |
|
|
967 | my ($self, $format, $string) = @_; |
|
|
968 | |
|
|
969 | pack "$format/a*", $string |
|
|
970 | }; |
|
|
971 | |
|
|
972 | =item json => $array_or_hashref |
|
|
973 | |
|
|
974 | Encodes the given hash or array reference into a JSON object. Unless you |
|
|
975 | provide your own JSON object, this means it will be encoded to JSON text |
|
|
976 | in UTF-8. |
|
|
977 | |
|
|
978 | JSON objects (and arrays) are self-delimiting, so you can write JSON at |
|
|
979 | one end of a handle and read them at the other end without using any |
|
|
980 | additional framing. |
|
|
981 | |
|
|
982 | The generated JSON text is guaranteed not to contain any newlines: While |
|
|
983 | this module doesn't need delimiters after or between JSON texts to be |
|
|
984 | able to read them, many other languages depend on that. |
|
|
985 | |
|
|
986 | A simple RPC protocol that interoperates easily with others is to send |
|
|
987 | JSON arrays (or objects, although arrays are usually the better choice as |
|
|
988 | they mimic how function argument passing works) and a newline after each |
|
|
989 | JSON text: |
|
|
990 | |
|
|
991 | $handle->push_write (json => ["method", "arg1", "arg2"]); # whatever |
|
|
992 | $handle->push_write ("\012"); |
|
|
993 | |
|
|
994 | An AnyEvent::Handle receiver would simply use the C<json> read type and |
|
|
995 | rely on the fact that the newline will be skipped as leading whitespace: |
|
|
996 | |
|
|
997 | $handle->push_read (json => sub { my $array = $_[1]; ... }); |
|
|
998 | |
|
|
999 | Other languages could read single lines terminated by a newline and pass |
|
|
1000 | this line into their JSON decoder of choice. |
|
|
1001 | |
|
|
1002 | =cut |
|
|
1003 | |
|
|
1004 | sub json_coder() { |
|
|
1005 | eval { require JSON::XS; JSON::XS->new->utf8 } |
|
|
1006 | || do { require JSON; JSON->new->utf8 } |
|
|
1007 | } |
|
|
1008 | |
|
|
1009 | register_write_type json => sub { |
|
|
1010 | my ($self, $ref) = @_; |
|
|
1011 | |
|
|
1012 | my $json = $self->{json} ||= json_coder; |
|
|
1013 | |
|
|
1014 | $json->encode ($ref) |
|
|
1015 | }; |
|
|
1016 | |
|
|
1017 | =item storable => $reference |
|
|
1018 | |
|
|
1019 | Freezes the given reference using L<Storable> and writes it to the |
|
|
1020 | handle. Uses the C<nfreeze> format. |
|
|
1021 | |
|
|
1022 | =cut |
|
|
1023 | |
|
|
1024 | register_write_type storable => sub { |
|
|
1025 | my ($self, $ref) = @_; |
|
|
1026 | |
|
|
1027 | require Storable; |
|
|
1028 | |
|
|
1029 | pack "w/a*", Storable::nfreeze ($ref) |
|
|
1030 | }; |
|
|
1031 | |
|
|
1032 | =back |
|
|
1033 | |
|
|
1034 | =item $handle->push_shutdown |
|
|
1035 | |
|
|
1036 | Sometimes you know you want to close the socket after writing your data |
|
|
1037 | before it was actually written. One way to do that is to replace your |
|
|
1038 | C<on_drain> handler by a callback that shuts down the socket (and set |
|
|
1039 | C<low_water_mark> to C<0>). This method is a shorthand for just that, and |
|
|
1040 | replaces the C<on_drain> callback with: |
|
|
1041 | |
|
|
1042 | sub { shutdown $_[0]{fh}, 1 } # for push_shutdown |
|
|
1043 | |
|
|
1044 | This simply shuts down the write side and signals an EOF condition to the |
|
|
1045 | the peer. |
|
|
1046 | |
|
|
1047 | You can rely on the normal read queue and C<on_eof> handling |
|
|
1048 | afterwards. This is the cleanest way to close a connection. |
|
|
1049 | |
|
|
1050 | This method may invoke callbacks (and therefore the handle might be |
|
|
1051 | destroyed after it returns). |
|
|
1052 | |
|
|
1053 | =cut |
|
|
1054 | |
|
|
1055 | sub push_shutdown { |
|
|
1056 | my ($self) = @_; |
|
|
1057 | |
|
|
1058 | delete $self->{low_water_mark}; |
|
|
1059 | $self->on_drain (sub { shutdown $_[0]{fh}, 1 }); |
|
|
1060 | } |
|
|
1061 | |
|
|
1062 | =item custom write types - Package::anyevent_write_type $handle, @args |
|
|
1063 | |
|
|
1064 | Instead of one of the predefined types, you can also specify the name of |
|
|
1065 | a package. AnyEvent will try to load the package and then expects to find |
|
|
1066 | a function named C<anyevent_write_type> inside. If it isn't found, it |
|
|
1067 | progressively tries to load the parent package until it either finds the |
|
|
1068 | function (good) or runs out of packages (bad). |
|
|
1069 | |
|
|
1070 | Whenever the given C<type> is used, C<push_write> will the function with |
|
|
1071 | the handle object and the remaining arguments. |
|
|
1072 | |
|
|
1073 | The function is supposed to return a single octet string that will be |
|
|
1074 | appended to the write buffer, so you cna mentally treat this function as a |
|
|
1075 | "arguments to on-the-wire-format" converter. |
|
|
1076 | |
|
|
1077 | Example: implement a custom write type C<join> that joins the remaining |
|
|
1078 | arguments using the first one. |
|
|
1079 | |
|
|
1080 | $handle->push_write (My::Type => " ", 1,2,3); |
|
|
1081 | |
|
|
1082 | # uses the following package, which can be defined in the "My::Type" or in |
|
|
1083 | # the "My" modules to be auto-loaded, or just about anywhere when the |
|
|
1084 | # My::Type::anyevent_write_type is defined before invoking it. |
|
|
1085 | |
|
|
1086 | package My::Type; |
|
|
1087 | |
|
|
1088 | sub anyevent_write_type { |
|
|
1089 | my ($handle, $delim, @args) = @_; |
|
|
1090 | |
|
|
1091 | join $delim, @args |
|
|
1092 | } |
|
|
1093 | |
|
|
1094 | =cut |
283 | |
1095 | |
284 | ############################################################################# |
1096 | ############################################################################# |
285 | |
1097 | |
286 | =back |
1098 | =back |
287 | |
1099 | |
… | |
… | |
294 | ways, the "simple" way, using only C<on_read> and the "complex" way, using |
1106 | ways, the "simple" way, using only C<on_read> and the "complex" way, using |
295 | a queue. |
1107 | a queue. |
296 | |
1108 | |
297 | In the simple case, you just install an C<on_read> callback and whenever |
1109 | In the simple case, you just install an C<on_read> callback and whenever |
298 | new data arrives, it will be called. You can then remove some data (if |
1110 | new data arrives, it will be called. You can then remove some data (if |
299 | enough is there) from the read buffer (C<< $handle->rbuf >>) if you want |
1111 | enough is there) from the read buffer (C<< $handle->rbuf >>). Or you can |
300 | or not. |
1112 | leave the data there if you want to accumulate more (e.g. when only a |
|
|
1113 | partial message has been received so far), or change the read queue with |
|
|
1114 | e.g. C<push_read>. |
301 | |
1115 | |
302 | In the more complex case, you want to queue multiple callbacks. In this |
1116 | In the more complex case, you want to queue multiple callbacks. In this |
303 | case, AnyEvent::Handle will call the first queued callback each time new |
1117 | case, AnyEvent::Handle will call the first queued callback each time new |
304 | data arrives and removes it when it has done its job (see C<push_read>, |
1118 | data arrives (also the first time it is queued) and remove it when it has |
305 | below). |
1119 | done its job (see C<push_read>, below). |
306 | |
1120 | |
307 | This way you can, for example, push three line-reads, followed by reading |
1121 | This way you can, for example, push three line-reads, followed by reading |
308 | a chunk of data, and AnyEvent::Handle will execute them in order. |
1122 | a chunk of data, and AnyEvent::Handle will execute them in order. |
309 | |
1123 | |
310 | Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by |
1124 | Example 1: EPP protocol parser. EPP sends 4 byte length info, followed by |
311 | the specified number of bytes which give an XML datagram. |
1125 | the specified number of bytes which give an XML datagram. |
312 | |
1126 | |
313 | # in the default state, expect some header bytes |
1127 | # in the default state, expect some header bytes |
314 | $handle->on_read (sub { |
1128 | $handle->on_read (sub { |
315 | # some data is here, now queue the length-header-read (4 octets) |
1129 | # some data is here, now queue the length-header-read (4 octets) |
316 | shift->unshift_read_chunk (4, sub { |
1130 | shift->unshift_read (chunk => 4, sub { |
317 | # header arrived, decode |
1131 | # header arrived, decode |
318 | my $len = unpack "N", $_[1]; |
1132 | my $len = unpack "N", $_[1]; |
319 | |
1133 | |
320 | # now read the payload |
1134 | # now read the payload |
321 | shift->unshift_read_chunk ($len, sub { |
1135 | shift->unshift_read (chunk => $len, sub { |
322 | my $xml = $_[1]; |
1136 | my $xml = $_[1]; |
323 | # handle xml |
1137 | # handle xml |
324 | }); |
1138 | }); |
325 | }); |
1139 | }); |
326 | }); |
1140 | }); |
327 | |
1141 | |
328 | Example 2: Implement a client for a protocol that replies either with |
1142 | Example 2: Implement a client for a protocol that replies either with "OK" |
329 | "OK" and another line or "ERROR" for one request, and 64 bytes for the |
1143 | and another line or "ERROR" for the first request that is sent, and 64 |
330 | second request. Due tot he availability of a full queue, we can just |
1144 | bytes for the second request. Due to the availability of a queue, we can |
331 | pipeline sending both requests and manipulate the queue as necessary in |
1145 | just pipeline sending both requests and manipulate the queue as necessary |
332 | the callbacks: |
1146 | in the callbacks. |
333 | |
1147 | |
334 | # request one |
1148 | When the first callback is called and sees an "OK" response, it will |
|
|
1149 | C<unshift> another line-read. This line-read will be queued I<before> the |
|
|
1150 | 64-byte chunk callback. |
|
|
1151 | |
|
|
1152 | # request one, returns either "OK + extra line" or "ERROR" |
335 | $handle->push_write ("request 1\015\012"); |
1153 | $handle->push_write ("request 1\015\012"); |
336 | |
1154 | |
337 | # we expect "ERROR" or "OK" as response, so push a line read |
1155 | # we expect "ERROR" or "OK" as response, so push a line read |
338 | $handle->push_read_line (sub { |
1156 | $handle->push_read (line => sub { |
339 | # if we got an "OK", we have to _prepend_ another line, |
1157 | # if we got an "OK", we have to _prepend_ another line, |
340 | # so it will be read before the second request reads its 64 bytes |
1158 | # so it will be read before the second request reads its 64 bytes |
341 | # which are already in the queue when this callback is called |
1159 | # which are already in the queue when this callback is called |
342 | # we don't do this in case we got an error |
1160 | # we don't do this in case we got an error |
343 | if ($_[1] eq "OK") { |
1161 | if ($_[1] eq "OK") { |
344 | $_[0]->unshift_read_line (sub { |
1162 | $_[0]->unshift_read (line => sub { |
345 | my $response = $_[1]; |
1163 | my $response = $_[1]; |
346 | ... |
1164 | ... |
347 | }); |
1165 | }); |
348 | } |
1166 | } |
349 | }); |
1167 | }); |
350 | |
1168 | |
351 | # request two |
1169 | # request two, simply returns 64 octets |
352 | $handle->push_write ("request 2\015\012"); |
1170 | $handle->push_write ("request 2\015\012"); |
353 | |
1171 | |
354 | # simply read 64 bytes, always |
1172 | # simply read 64 bytes, always |
355 | $handle->push_read_chunk (64, sub { |
1173 | $handle->push_read (chunk => 64, sub { |
356 | my $response = $_[1]; |
1174 | my $response = $_[1]; |
357 | ... |
1175 | ... |
358 | }); |
1176 | }); |
359 | |
1177 | |
360 | =over 4 |
1178 | =over 4 |
… | |
… | |
362 | =cut |
1180 | =cut |
363 | |
1181 | |
364 | sub _drain_rbuf { |
1182 | sub _drain_rbuf { |
365 | my ($self) = @_; |
1183 | my ($self) = @_; |
366 | |
1184 | |
|
|
1185 | # avoid recursion |
367 | return if $self->{in_drain}; |
1186 | return if $self->{_skip_drain_rbuf}; |
368 | local $self->{in_drain} = 1; |
1187 | local $self->{_skip_drain_rbuf} = 1; |
369 | |
1188 | |
|
|
1189 | while () { |
|
|
1190 | # we need to use a separate tls read buffer, as we must not receive data while |
|
|
1191 | # we are draining the buffer, and this can only happen with TLS. |
|
|
1192 | $self->{rbuf} .= delete $self->{_tls_rbuf} |
|
|
1193 | if exists $self->{_tls_rbuf}; |
|
|
1194 | |
370 | while (my $len = length $self->{rbuf}) { |
1195 | my $len = length $self->{rbuf}; |
371 | no strict 'refs'; |
1196 | |
372 | if (my $cb = shift @{ $self->{queue} }) { |
1197 | if (my $cb = shift @{ $self->{_queue} }) { |
373 | if (!$cb->($self)) { |
1198 | unless ($cb->($self)) { |
|
|
1199 | # no progress can be made |
|
|
1200 | # (not enough data and no data forthcoming) |
|
|
1201 | $self->_error (Errno::EPIPE, 1), return |
374 | if ($self->{eof}) { |
1202 | if $self->{_eof}; |
375 | # no progress can be made (not enough data and no data forthcoming) |
|
|
376 | $! = &Errno::EPIPE; return $self->error; |
|
|
377 | } |
|
|
378 | |
1203 | |
379 | unshift @{ $self->{queue} }, $cb; |
1204 | unshift @{ $self->{_queue} }, $cb; |
380 | return; |
1205 | last; |
381 | } |
1206 | } |
382 | } elsif ($self->{on_read}) { |
1207 | } elsif ($self->{on_read}) { |
|
|
1208 | last unless $len; |
|
|
1209 | |
383 | $self->{on_read}($self); |
1210 | $self->{on_read}($self); |
384 | |
1211 | |
385 | if ( |
1212 | if ( |
386 | $self->{eof} # if no further data will arrive |
|
|
387 | && $len == length $self->{rbuf} # and no data has been consumed |
1213 | $len == length $self->{rbuf} # if no data has been consumed |
388 | && !@{ $self->{queue} } # and the queue is still empty |
1214 | && !@{ $self->{_queue} } # and the queue is still empty |
389 | && $self->{on_read} # and we still want to read data |
1215 | && $self->{on_read} # but we still have on_read |
390 | ) { |
1216 | ) { |
|
|
1217 | # no further data will arrive |
391 | # then no progress can be made |
1218 | # so no progress can be made |
392 | $! = &Errno::EPIPE; return $self->error; |
1219 | $self->_error (Errno::EPIPE, 1), return |
|
|
1220 | if $self->{_eof}; |
|
|
1221 | |
|
|
1222 | last; # more data might arrive |
393 | } |
1223 | } |
394 | } else { |
1224 | } else { |
395 | # read side becomes idle |
1225 | # read side becomes idle |
396 | delete $self->{rw}; |
1226 | delete $self->{_rw} unless $self->{tls}; |
397 | return; |
1227 | last; |
398 | } |
1228 | } |
399 | } |
1229 | } |
400 | |
1230 | |
401 | if ($self->{eof}) { |
1231 | if ($self->{_eof}) { |
402 | $self->_shutdown; |
1232 | $self->{on_eof} |
403 | $self->{on_eof}($self); |
1233 | ? $self->{on_eof}($self) |
|
|
1234 | : $self->_error (0, 1, "Unexpected end-of-file"); |
|
|
1235 | |
|
|
1236 | return; |
|
|
1237 | } |
|
|
1238 | |
|
|
1239 | if ( |
|
|
1240 | defined $self->{rbuf_max} |
|
|
1241 | && $self->{rbuf_max} < length $self->{rbuf} |
|
|
1242 | ) { |
|
|
1243 | $self->_error (Errno::ENOSPC, 1), return; |
|
|
1244 | } |
|
|
1245 | |
|
|
1246 | # may need to restart read watcher |
|
|
1247 | unless ($self->{_rw}) { |
|
|
1248 | $self->start_read |
|
|
1249 | if $self->{on_read} || @{ $self->{_queue} }; |
404 | } |
1250 | } |
405 | } |
1251 | } |
406 | |
1252 | |
407 | =item $handle->on_read ($cb) |
1253 | =item $handle->on_read ($cb) |
408 | |
1254 | |
409 | This replaces the currently set C<on_read> callback, or clears it (when |
1255 | This replaces the currently set C<on_read> callback, or clears it (when |
410 | the new callback is C<undef>). See the description of C<on_read> in the |
1256 | the new callback is C<undef>). See the description of C<on_read> in the |
411 | constructor. |
1257 | constructor. |
412 | |
1258 | |
|
|
1259 | This method may invoke callbacks (and therefore the handle might be |
|
|
1260 | destroyed after it returns). |
|
|
1261 | |
413 | =cut |
1262 | =cut |
414 | |
1263 | |
415 | sub on_read { |
1264 | sub on_read { |
416 | my ($self, $cb) = @_; |
1265 | my ($self, $cb) = @_; |
417 | |
1266 | |
418 | $self->{on_read} = $cb; |
1267 | $self->{on_read} = $cb; |
|
|
1268 | $self->_drain_rbuf if $cb; |
419 | } |
1269 | } |
420 | |
1270 | |
421 | =item $handle->rbuf |
1271 | =item $handle->rbuf |
422 | |
1272 | |
423 | Returns the read buffer (as a modifiable lvalue). |
1273 | Returns the read buffer (as a modifiable lvalue). You can also access the |
|
|
1274 | read buffer directly as the C<< ->{rbuf} >> member, if you want (this is |
|
|
1275 | much faster, and no less clean). |
424 | |
1276 | |
425 | You can access the read buffer directly as the C<< ->{rbuf} >> member, if |
1277 | The only operation allowed on the read buffer (apart from looking at it) |
426 | you want. |
1278 | is removing data from its beginning. Otherwise modifying or appending to |
|
|
1279 | it is not allowed and will lead to hard-to-track-down bugs. |
427 | |
1280 | |
428 | NOTE: The read buffer should only be used or modified if the C<on_read>, |
1281 | NOTE: The read buffer should only be used or modified in the C<on_read> |
429 | C<push_read> or C<unshift_read> methods are used. The other read methods |
1282 | callback or when C<push_read> or C<unshift_read> are used with a single |
430 | automatically manage the read buffer. |
1283 | callback (i.e. untyped). Typed C<push_read> and C<unshift_read> methods |
|
|
1284 | will manage the read buffer on their own. |
431 | |
1285 | |
432 | =cut |
1286 | =cut |
433 | |
1287 | |
434 | sub rbuf : lvalue { |
1288 | sub rbuf : lvalue { |
435 | $_[0]{rbuf} |
1289 | $_[0]{rbuf} |
… | |
… | |
442 | Append the given callback to the end of the queue (C<push_read>) or |
1296 | Append the given callback to the end of the queue (C<push_read>) or |
443 | prepend it (C<unshift_read>). |
1297 | prepend it (C<unshift_read>). |
444 | |
1298 | |
445 | The callback is called each time some additional read data arrives. |
1299 | The callback is called each time some additional read data arrives. |
446 | |
1300 | |
447 | It must check wether enough data is in the read buffer already. |
1301 | It must check whether enough data is in the read buffer already. |
448 | |
1302 | |
449 | If not enough data is available, it must return the empty list or a false |
1303 | If not enough data is available, it must return the empty list or a false |
450 | value, in which case it will be called repeatedly until enough data is |
1304 | value, in which case it will be called repeatedly until enough data is |
451 | available (or an error condition is detected). |
1305 | available (or an error condition is detected). |
452 | |
1306 | |
453 | If enough data was available, then the callback must remove all data it is |
1307 | If enough data was available, then the callback must remove all data it is |
454 | interested in (which can be none at all) and return a true value. After returning |
1308 | interested in (which can be none at all) and return a true value. After returning |
455 | true, it will be removed from the queue. |
1309 | true, it will be removed from the queue. |
456 | |
1310 | |
|
|
1311 | These methods may invoke callbacks (and therefore the handle might be |
|
|
1312 | destroyed after it returns). |
|
|
1313 | |
457 | =cut |
1314 | =cut |
|
|
1315 | |
|
|
1316 | our %RH; |
|
|
1317 | |
|
|
1318 | sub register_read_type($$) { |
|
|
1319 | $RH{$_[0]} = $_[1]; |
|
|
1320 | } |
458 | |
1321 | |
459 | sub push_read { |
1322 | sub push_read { |
460 | my ($self, $cb) = @_; |
1323 | my $self = shift; |
|
|
1324 | my $cb = pop; |
461 | |
1325 | |
|
|
1326 | if (@_) { |
|
|
1327 | my $type = shift; |
|
|
1328 | |
|
|
1329 | $cb = ($RH{$type} ||= _load_func "$type\::anyevent_read_type" |
|
|
1330 | or Carp::croak "unsupported/unloadable type '$type' passed to AnyEvent::Handle::push_read") |
|
|
1331 | ->($self, $cb, @_); |
|
|
1332 | } |
|
|
1333 | |
462 | push @{ $self->{queue} }, $cb; |
1334 | push @{ $self->{_queue} }, $cb; |
463 | $self->_drain_rbuf; |
1335 | $self->_drain_rbuf; |
464 | } |
1336 | } |
465 | |
1337 | |
466 | sub unshift_read { |
1338 | sub unshift_read { |
467 | my ($self, $cb) = @_; |
1339 | my $self = shift; |
|
|
1340 | my $cb = pop; |
468 | |
1341 | |
|
|
1342 | if (@_) { |
|
|
1343 | my $type = shift; |
|
|
1344 | |
|
|
1345 | $cb = ($RH{$type} ||= _load_func "$type\::anyevent_read_type" |
|
|
1346 | or Carp::croak "unsupported/unloadable type '$type' passed to AnyEvent::Handle::unshift_read") |
|
|
1347 | ->($self, $cb, @_); |
|
|
1348 | } |
|
|
1349 | |
469 | push @{ $self->{queue} }, $cb; |
1350 | unshift @{ $self->{_queue} }, $cb; |
470 | $self->_drain_rbuf; |
1351 | $self->_drain_rbuf; |
471 | } |
1352 | } |
472 | |
1353 | |
473 | =item $handle->push_read_chunk ($len, $cb->($self, $data)) |
1354 | =item $handle->push_read (type => @args, $cb) |
474 | |
1355 | |
475 | =item $handle->unshift_read_chunk ($len, $cb->($self, $data)) |
1356 | =item $handle->unshift_read (type => @args, $cb) |
476 | |
1357 | |
477 | Append the given callback to the end of the queue (C<push_read_chunk>) or |
1358 | Instead of providing a callback that parses the data itself you can chose |
478 | prepend it (C<unshift_read_chunk>). |
1359 | between a number of predefined parsing formats, for chunks of data, lines |
|
|
1360 | etc. You can also specify the (fully qualified) name of a package, in |
|
|
1361 | which case AnyEvent tries to load the package and then expects to find the |
|
|
1362 | C<anyevent_read_type> function inside (see "custom read types", below). |
479 | |
1363 | |
480 | The callback will be called only once C<$len> bytes have been read, and |
1364 | Predefined types are (if you have ideas for additional types, feel free to |
481 | these C<$len> bytes will be passed to the callback. |
1365 | drop by and tell us): |
482 | |
1366 | |
483 | =cut |
1367 | =over 4 |
484 | |
1368 | |
485 | sub _read_chunk($$) { |
1369 | =item chunk => $octets, $cb->($handle, $data) |
|
|
1370 | |
|
|
1371 | Invoke the callback only once C<$octets> bytes have been read. Pass the |
|
|
1372 | data read to the callback. The callback will never be called with less |
|
|
1373 | data. |
|
|
1374 | |
|
|
1375 | Example: read 2 bytes. |
|
|
1376 | |
|
|
1377 | $handle->push_read (chunk => 2, sub { |
|
|
1378 | warn "yay ", unpack "H*", $_[1]; |
|
|
1379 | }); |
|
|
1380 | |
|
|
1381 | =cut |
|
|
1382 | |
|
|
1383 | register_read_type chunk => sub { |
486 | my ($self, $len, $cb) = @_; |
1384 | my ($self, $cb, $len) = @_; |
487 | |
1385 | |
488 | sub { |
1386 | sub { |
489 | $len <= length $_[0]{rbuf} or return; |
1387 | $len <= length $_[0]{rbuf} or return; |
490 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
1388 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
491 | 1 |
1389 | 1 |
492 | } |
1390 | } |
493 | } |
1391 | }; |
494 | |
1392 | |
495 | sub push_read_chunk { |
1393 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
496 | $_[0]->push_read (&_read_chunk); |
|
|
497 | } |
|
|
498 | |
|
|
499 | |
|
|
500 | sub unshift_read_chunk { |
|
|
501 | $_[0]->unshift_read (&_read_chunk); |
|
|
502 | } |
|
|
503 | |
|
|
504 | =item $handle->push_read_line ([$eol, ]$cb->($self, $line, $eol)) |
|
|
505 | |
|
|
506 | =item $handle->unshift_read_line ([$eol, ]$cb->($self, $line, $eol)) |
|
|
507 | |
|
|
508 | Append the given callback to the end of the queue (C<push_read_line>) or |
|
|
509 | prepend it (C<unshift_read_line>). |
|
|
510 | |
1394 | |
511 | The callback will be called only once a full line (including the end of |
1395 | The callback will be called only once a full line (including the end of |
512 | line marker, C<$eol>) has been read. This line (excluding the end of line |
1396 | line marker, C<$eol>) has been read. This line (excluding the end of line |
513 | marker) will be passed to the callback as second argument (C<$line>), and |
1397 | marker) will be passed to the callback as second argument (C<$line>), and |
514 | the end of line marker as the third argument (C<$eol>). |
1398 | the end of line marker as the third argument (C<$eol>). |
… | |
… | |
525 | Partial lines at the end of the stream will never be returned, as they are |
1409 | Partial lines at the end of the stream will never be returned, as they are |
526 | not marked by the end of line marker. |
1410 | not marked by the end of line marker. |
527 | |
1411 | |
528 | =cut |
1412 | =cut |
529 | |
1413 | |
530 | sub _read_line($$) { |
1414 | register_read_type line => sub { |
531 | my $self = shift; |
1415 | my ($self, $cb, $eol) = @_; |
532 | my $cb = pop; |
|
|
533 | my $eol = @_ ? shift : qr|(\015?\012)|; |
|
|
534 | my $pos; |
|
|
535 | |
1416 | |
|
|
1417 | if (@_ < 3) { |
|
|
1418 | # this is more than twice as fast as the generic code below |
|
|
1419 | sub { |
|
|
1420 | $_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return; |
|
|
1421 | |
|
|
1422 | $cb->($_[0], $1, $2); |
|
|
1423 | 1 |
|
|
1424 | } |
|
|
1425 | } else { |
536 | $eol = qr|(\Q$eol\E)| unless ref $eol; |
1426 | $eol = quotemeta $eol unless ref $eol; |
537 | $eol = qr|^(.*?)($eol)|; |
1427 | $eol = qr|^(.*?)($eol)|s; |
|
|
1428 | |
|
|
1429 | sub { |
|
|
1430 | $_[0]{rbuf} =~ s/$eol// or return; |
|
|
1431 | |
|
|
1432 | $cb->($_[0], $1, $2); |
|
|
1433 | 1 |
|
|
1434 | } |
|
|
1435 | } |
|
|
1436 | }; |
|
|
1437 | |
|
|
1438 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
|
|
1439 | |
|
|
1440 | Makes a regex match against the regex object C<$accept> and returns |
|
|
1441 | everything up to and including the match. |
|
|
1442 | |
|
|
1443 | Example: read a single line terminated by '\n'. |
|
|
1444 | |
|
|
1445 | $handle->push_read (regex => qr<\n>, sub { ... }); |
|
|
1446 | |
|
|
1447 | If C<$reject> is given and not undef, then it determines when the data is |
|
|
1448 | to be rejected: it is matched against the data when the C<$accept> regex |
|
|
1449 | does not match and generates an C<EBADMSG> error when it matches. This is |
|
|
1450 | useful to quickly reject wrong data (to avoid waiting for a timeout or a |
|
|
1451 | receive buffer overflow). |
|
|
1452 | |
|
|
1453 | Example: expect a single decimal number followed by whitespace, reject |
|
|
1454 | anything else (not the use of an anchor). |
|
|
1455 | |
|
|
1456 | $handle->push_read (regex => qr<^[0-9]+\s>, qr<[^0-9]>, sub { ... }); |
|
|
1457 | |
|
|
1458 | If C<$skip> is given and not C<undef>, then it will be matched against |
|
|
1459 | the receive buffer when neither C<$accept> nor C<$reject> match, |
|
|
1460 | and everything preceding and including the match will be accepted |
|
|
1461 | unconditionally. This is useful to skip large amounts of data that you |
|
|
1462 | know cannot be matched, so that the C<$accept> or C<$reject> regex do not |
|
|
1463 | have to start matching from the beginning. This is purely an optimisation |
|
|
1464 | and is usually worth it only when you expect more than a few kilobytes. |
|
|
1465 | |
|
|
1466 | Example: expect a http header, which ends at C<\015\012\015\012>. Since we |
|
|
1467 | expect the header to be very large (it isn't in practice, but...), we use |
|
|
1468 | a skip regex to skip initial portions. The skip regex is tricky in that |
|
|
1469 | it only accepts something not ending in either \015 or \012, as these are |
|
|
1470 | required for the accept regex. |
|
|
1471 | |
|
|
1472 | $handle->push_read (regex => |
|
|
1473 | qr<\015\012\015\012>, |
|
|
1474 | undef, # no reject |
|
|
1475 | qr<^.*[^\015\012]>, |
|
|
1476 | sub { ... }); |
|
|
1477 | |
|
|
1478 | =cut |
|
|
1479 | |
|
|
1480 | register_read_type regex => sub { |
|
|
1481 | my ($self, $cb, $accept, $reject, $skip) = @_; |
|
|
1482 | |
|
|
1483 | my $data; |
|
|
1484 | my $rbuf = \$self->{rbuf}; |
538 | |
1485 | |
539 | sub { |
1486 | sub { |
540 | $_[0]{rbuf} =~ s/$eol// or return; |
1487 | # accept |
|
|
1488 | if ($$rbuf =~ $accept) { |
|
|
1489 | $data .= substr $$rbuf, 0, $+[0], ""; |
|
|
1490 | $cb->($self, $data); |
|
|
1491 | return 1; |
|
|
1492 | } |
|
|
1493 | |
|
|
1494 | # reject |
|
|
1495 | if ($reject && $$rbuf =~ $reject) { |
|
|
1496 | $self->_error (Errno::EBADMSG); |
|
|
1497 | } |
541 | |
1498 | |
542 | $cb->($_[0], $1, $2); |
1499 | # skip |
|
|
1500 | if ($skip && $$rbuf =~ $skip) { |
|
|
1501 | $data .= substr $$rbuf, 0, $+[0], ""; |
|
|
1502 | } |
|
|
1503 | |
|
|
1504 | () |
|
|
1505 | } |
|
|
1506 | }; |
|
|
1507 | |
|
|
1508 | =item netstring => $cb->($handle, $string) |
|
|
1509 | |
|
|
1510 | A netstring (http://cr.yp.to/proto/netstrings.txt, this is not an endorsement). |
|
|
1511 | |
|
|
1512 | Throws an error with C<$!> set to EBADMSG on format violations. |
|
|
1513 | |
|
|
1514 | =cut |
|
|
1515 | |
|
|
1516 | register_read_type netstring => sub { |
|
|
1517 | my ($self, $cb) = @_; |
|
|
1518 | |
|
|
1519 | sub { |
|
|
1520 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
|
|
1521 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
|
|
1522 | $self->_error (Errno::EBADMSG); |
|
|
1523 | } |
|
|
1524 | return; |
|
|
1525 | } |
|
|
1526 | |
|
|
1527 | my $len = $1; |
|
|
1528 | |
|
|
1529 | $self->unshift_read (chunk => $len, sub { |
|
|
1530 | my $string = $_[1]; |
|
|
1531 | $_[0]->unshift_read (chunk => 1, sub { |
|
|
1532 | if ($_[1] eq ",") { |
|
|
1533 | $cb->($_[0], $string); |
|
|
1534 | } else { |
|
|
1535 | $self->_error (Errno::EBADMSG); |
|
|
1536 | } |
|
|
1537 | }); |
|
|
1538 | }); |
|
|
1539 | |
543 | 1 |
1540 | 1 |
544 | } |
1541 | } |
545 | } |
1542 | }; |
546 | |
1543 | |
547 | sub push_read_line { |
1544 | =item packstring => $format, $cb->($handle, $string) |
548 | $_[0]->push_read (&_read_line); |
|
|
549 | } |
|
|
550 | |
1545 | |
551 | sub unshift_read_line { |
1546 | An octet string prefixed with an encoded length. The encoding C<$format> |
552 | $_[0]->unshift_read (&_read_line); |
1547 | uses the same format as a Perl C<pack> format, but must specify a single |
553 | } |
1548 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
|
|
1549 | optional C<!>, C<< < >> or C<< > >> modifier). |
|
|
1550 | |
|
|
1551 | For example, DNS over TCP uses a prefix of C<n> (2 octet network order), |
|
|
1552 | EPP uses a prefix of C<N> (4 octtes). |
|
|
1553 | |
|
|
1554 | Example: read a block of data prefixed by its length in BER-encoded |
|
|
1555 | format (very efficient). |
|
|
1556 | |
|
|
1557 | $handle->push_read (packstring => "w", sub { |
|
|
1558 | my ($handle, $data) = @_; |
|
|
1559 | }); |
|
|
1560 | |
|
|
1561 | =cut |
|
|
1562 | |
|
|
1563 | register_read_type packstring => sub { |
|
|
1564 | my ($self, $cb, $format) = @_; |
|
|
1565 | |
|
|
1566 | sub { |
|
|
1567 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
|
|
1568 | defined (my $len = eval { unpack $format, $_[0]{rbuf} }) |
|
|
1569 | or return; |
|
|
1570 | |
|
|
1571 | $format = length pack $format, $len; |
|
|
1572 | |
|
|
1573 | # bypass unshift if we already have the remaining chunk |
|
|
1574 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1575 | my $data = substr $_[0]{rbuf}, $format, $len; |
|
|
1576 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1577 | $cb->($_[0], $data); |
|
|
1578 | } else { |
|
|
1579 | # remove prefix |
|
|
1580 | substr $_[0]{rbuf}, 0, $format, ""; |
|
|
1581 | |
|
|
1582 | # read remaining chunk |
|
|
1583 | $_[0]->unshift_read (chunk => $len, $cb); |
|
|
1584 | } |
|
|
1585 | |
|
|
1586 | 1 |
|
|
1587 | } |
|
|
1588 | }; |
|
|
1589 | |
|
|
1590 | =item json => $cb->($handle, $hash_or_arrayref) |
|
|
1591 | |
|
|
1592 | Reads a JSON object or array, decodes it and passes it to the |
|
|
1593 | callback. When a parse error occurs, an C<EBADMSG> error will be raised. |
|
|
1594 | |
|
|
1595 | If a C<json> object was passed to the constructor, then that will be used |
|
|
1596 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
|
|
1597 | |
|
|
1598 | This read type uses the incremental parser available with JSON version |
|
|
1599 | 2.09 (and JSON::XS version 2.2) and above. You have to provide a |
|
|
1600 | dependency on your own: this module will load the JSON module, but |
|
|
1601 | AnyEvent does not depend on it itself. |
|
|
1602 | |
|
|
1603 | Since JSON texts are fully self-delimiting, the C<json> read and write |
|
|
1604 | types are an ideal simple RPC protocol: just exchange JSON datagrams. See |
|
|
1605 | the C<json> write type description, above, for an actual example. |
|
|
1606 | |
|
|
1607 | =cut |
|
|
1608 | |
|
|
1609 | register_read_type json => sub { |
|
|
1610 | my ($self, $cb) = @_; |
|
|
1611 | |
|
|
1612 | my $json = $self->{json} ||= json_coder; |
|
|
1613 | |
|
|
1614 | my $data; |
|
|
1615 | my $rbuf = \$self->{rbuf}; |
|
|
1616 | |
|
|
1617 | sub { |
|
|
1618 | my $ref = eval { $json->incr_parse ($self->{rbuf}) }; |
|
|
1619 | |
|
|
1620 | if ($ref) { |
|
|
1621 | $self->{rbuf} = $json->incr_text; |
|
|
1622 | $json->incr_text = ""; |
|
|
1623 | $cb->($self, $ref); |
|
|
1624 | |
|
|
1625 | 1 |
|
|
1626 | } elsif ($@) { |
|
|
1627 | # error case |
|
|
1628 | $json->incr_skip; |
|
|
1629 | |
|
|
1630 | $self->{rbuf} = $json->incr_text; |
|
|
1631 | $json->incr_text = ""; |
|
|
1632 | |
|
|
1633 | $self->_error (Errno::EBADMSG); |
|
|
1634 | |
|
|
1635 | () |
|
|
1636 | } else { |
|
|
1637 | $self->{rbuf} = ""; |
|
|
1638 | |
|
|
1639 | () |
|
|
1640 | } |
|
|
1641 | } |
|
|
1642 | }; |
|
|
1643 | |
|
|
1644 | =item storable => $cb->($handle, $ref) |
|
|
1645 | |
|
|
1646 | Deserialises a L<Storable> frozen representation as written by the |
|
|
1647 | C<storable> write type (BER-encoded length prefix followed by nfreeze'd |
|
|
1648 | data). |
|
|
1649 | |
|
|
1650 | Raises C<EBADMSG> error if the data could not be decoded. |
|
|
1651 | |
|
|
1652 | =cut |
|
|
1653 | |
|
|
1654 | register_read_type storable => sub { |
|
|
1655 | my ($self, $cb) = @_; |
|
|
1656 | |
|
|
1657 | require Storable; |
|
|
1658 | |
|
|
1659 | sub { |
|
|
1660 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
|
|
1661 | defined (my $len = eval { unpack "w", $_[0]{rbuf} }) |
|
|
1662 | or return; |
|
|
1663 | |
|
|
1664 | my $format = length pack "w", $len; |
|
|
1665 | |
|
|
1666 | # bypass unshift if we already have the remaining chunk |
|
|
1667 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1668 | my $data = substr $_[0]{rbuf}, $format, $len; |
|
|
1669 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1670 | $cb->($_[0], Storable::thaw ($data)); |
|
|
1671 | } else { |
|
|
1672 | # remove prefix |
|
|
1673 | substr $_[0]{rbuf}, 0, $format, ""; |
|
|
1674 | |
|
|
1675 | # read remaining chunk |
|
|
1676 | $_[0]->unshift_read (chunk => $len, sub { |
|
|
1677 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
|
|
1678 | $cb->($_[0], $ref); |
|
|
1679 | } else { |
|
|
1680 | $self->_error (Errno::EBADMSG); |
|
|
1681 | } |
|
|
1682 | }); |
|
|
1683 | } |
|
|
1684 | |
|
|
1685 | 1 |
|
|
1686 | } |
|
|
1687 | }; |
|
|
1688 | |
|
|
1689 | =back |
|
|
1690 | |
|
|
1691 | =item custom read types - Package::anyevent_read_type $handle, $cb, @args |
|
|
1692 | |
|
|
1693 | Instead of one of the predefined types, you can also specify the name |
|
|
1694 | of a package. AnyEvent will try to load the package and then expects to |
|
|
1695 | find a function named C<anyevent_read_type> inside. If it isn't found, it |
|
|
1696 | progressively tries to load the parent package until it either finds the |
|
|
1697 | function (good) or runs out of packages (bad). |
|
|
1698 | |
|
|
1699 | Whenever this type is used, C<push_read> will invoke the function with the |
|
|
1700 | handle object, the original callback and the remaining arguments. |
|
|
1701 | |
|
|
1702 | The function is supposed to return a callback (usually a closure) that |
|
|
1703 | works as a plain read callback (see C<< ->push_read ($cb) >>), so you can |
|
|
1704 | mentally treat the function as a "configurable read type to read callback" |
|
|
1705 | converter. |
|
|
1706 | |
|
|
1707 | It should invoke the original callback when it is done reading (remember |
|
|
1708 | to pass C<$handle> as first argument as all other callbacks do that, |
|
|
1709 | although there is no strict requirement on this). |
|
|
1710 | |
|
|
1711 | For examples, see the source of this module (F<perldoc -m |
|
|
1712 | AnyEvent::Handle>, search for C<register_read_type>)). |
554 | |
1713 | |
555 | =item $handle->stop_read |
1714 | =item $handle->stop_read |
556 | |
1715 | |
557 | =item $handle->start_read |
1716 | =item $handle->start_read |
558 | |
1717 | |
559 | In rare cases you actually do not want to read anything form the |
1718 | In rare cases you actually do not want to read anything from the |
560 | socket. In this case you can call C<stop_read>. Neither C<on_read> no |
1719 | socket. In this case you can call C<stop_read>. Neither C<on_read> nor |
561 | any queued callbacks will be executed then. To start readign again, call |
1720 | any queued callbacks will be executed then. To start reading again, call |
562 | C<start_read>. |
1721 | C<start_read>. |
|
|
1722 | |
|
|
1723 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
|
|
1724 | you change the C<on_read> callback or push/unshift a read callback, and it |
|
|
1725 | will automatically C<stop_read> for you when neither C<on_read> is set nor |
|
|
1726 | there are any read requests in the queue. |
|
|
1727 | |
|
|
1728 | These methods will have no effect when in TLS mode (as TLS doesn't support |
|
|
1729 | half-duplex connections). |
563 | |
1730 | |
564 | =cut |
1731 | =cut |
565 | |
1732 | |
566 | sub stop_read { |
1733 | sub stop_read { |
567 | my ($self) = @_; |
1734 | my ($self) = @_; |
568 | |
1735 | |
569 | delete $self->{rw}; |
1736 | delete $self->{_rw} unless $self->{tls}; |
570 | } |
1737 | } |
571 | |
1738 | |
572 | sub start_read { |
1739 | sub start_read { |
573 | my ($self) = @_; |
1740 | my ($self) = @_; |
574 | |
1741 | |
575 | unless ($self->{rw} || $self->{eof}) { |
1742 | unless ($self->{_rw} || $self->{_eof} || !$self->{fh}) { |
576 | Scalar::Util::weaken $self; |
1743 | Scalar::Util::weaken $self; |
577 | |
1744 | |
578 | $self->{rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
1745 | $self->{_rw} = AE::io $self->{fh}, 0, sub { |
|
|
1746 | my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf}); |
579 | my $len = sysread $self->{fh}, $self->{rbuf}, $self->{read_size} || 8192, length $self->{rbuf}; |
1747 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
580 | |
1748 | |
581 | if ($len > 0) { |
1749 | if ($len > 0) { |
582 | if (defined $self->{rbuf_max}) { |
1750 | $self->{_activity} = $self->{_ractivity} = AE::now; |
583 | if ($self->{rbuf_max} < length $self->{rbuf}) { |
1751 | |
584 | $! = &Errno::ENOSPC; return $self->error; |
1752 | if ($self->{tls}) { |
585 | } |
1753 | Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf); |
|
|
1754 | |
|
|
1755 | &_dotls ($self); |
|
|
1756 | } else { |
|
|
1757 | $self->_drain_rbuf; |
586 | } |
1758 | } |
587 | |
1759 | |
588 | } elsif (defined $len) { |
1760 | } elsif (defined $len) { |
589 | $self->{eof} = 1; |
|
|
590 | delete $self->{rw}; |
1761 | delete $self->{_rw}; |
|
|
1762 | $self->{_eof} = 1; |
|
|
1763 | $self->_drain_rbuf; |
591 | |
1764 | |
592 | } elsif ($! != EAGAIN && $! != EINTR) { |
1765 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
593 | return $self->error; |
1766 | return $self->_error ($!, 1); |
594 | } |
1767 | } |
|
|
1768 | }; |
|
|
1769 | } |
|
|
1770 | } |
595 | |
1771 | |
|
|
1772 | our $ERROR_SYSCALL; |
|
|
1773 | our $ERROR_WANT_READ; |
|
|
1774 | |
|
|
1775 | sub _tls_error { |
|
|
1776 | my ($self, $err) = @_; |
|
|
1777 | |
|
|
1778 | return $self->_error ($!, 1) |
|
|
1779 | if $err == Net::SSLeay::ERROR_SYSCALL (); |
|
|
1780 | |
|
|
1781 | my $err =Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ()); |
|
|
1782 | |
|
|
1783 | # reduce error string to look less scary |
|
|
1784 | $err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /; |
|
|
1785 | |
|
|
1786 | if ($self->{_on_starttls}) { |
|
|
1787 | (delete $self->{_on_starttls})->($self, undef, $err); |
|
|
1788 | &_freetls; |
|
|
1789 | } else { |
|
|
1790 | &_freetls; |
|
|
1791 | $self->_error (Errno::EPROTO, 1, $err); |
|
|
1792 | } |
|
|
1793 | } |
|
|
1794 | |
|
|
1795 | # poll the write BIO and send the data if applicable |
|
|
1796 | # also decode read data if possible |
|
|
1797 | # this is basiclaly our TLS state machine |
|
|
1798 | # more efficient implementations are possible with openssl, |
|
|
1799 | # but not with the buggy and incomplete Net::SSLeay. |
|
|
1800 | sub _dotls { |
|
|
1801 | my ($self) = @_; |
|
|
1802 | |
|
|
1803 | my $tmp; |
|
|
1804 | |
|
|
1805 | if (length $self->{_tls_wbuf}) { |
|
|
1806 | while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
|
|
1807 | substr $self->{_tls_wbuf}, 0, $tmp, ""; |
|
|
1808 | } |
|
|
1809 | |
|
|
1810 | $tmp = Net::SSLeay::get_error ($self->{tls}, $tmp); |
|
|
1811 | return $self->_tls_error ($tmp) |
|
|
1812 | if $tmp != $ERROR_WANT_READ |
|
|
1813 | && ($tmp != $ERROR_SYSCALL || $!); |
|
|
1814 | } |
|
|
1815 | |
|
|
1816 | while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) { |
|
|
1817 | unless (length $tmp) { |
|
|
1818 | $self->{_on_starttls} |
|
|
1819 | and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ??? |
|
|
1820 | &_freetls; |
|
|
1821 | |
|
|
1822 | if ($self->{on_stoptls}) { |
|
|
1823 | $self->{on_stoptls}($self); |
|
|
1824 | return; |
|
|
1825 | } else { |
|
|
1826 | # let's treat SSL-eof as we treat normal EOF |
|
|
1827 | delete $self->{_rw}; |
|
|
1828 | $self->{_eof} = 1; |
|
|
1829 | } |
|
|
1830 | } |
|
|
1831 | |
|
|
1832 | $self->{_tls_rbuf} .= $tmp; |
596 | $self->_drain_rbuf; |
1833 | $self->_drain_rbuf; |
|
|
1834 | $self->{tls} or return; # tls session might have gone away in callback |
|
|
1835 | } |
|
|
1836 | |
|
|
1837 | $tmp = Net::SSLeay::get_error ($self->{tls}, -1); |
|
|
1838 | return $self->_tls_error ($tmp) |
|
|
1839 | if $tmp != $ERROR_WANT_READ |
|
|
1840 | && ($tmp != $ERROR_SYSCALL || $!); |
|
|
1841 | |
|
|
1842 | while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
|
|
1843 | $self->{wbuf} .= $tmp; |
|
|
1844 | $self->_drain_wbuf; |
|
|
1845 | $self->{tls} or return; # tls session might have gone away in callback |
|
|
1846 | } |
|
|
1847 | |
|
|
1848 | $self->{_on_starttls} |
|
|
1849 | and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK () |
|
|
1850 | and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established"); |
|
|
1851 | } |
|
|
1852 | |
|
|
1853 | =item $handle->starttls ($tls[, $tls_ctx]) |
|
|
1854 | |
|
|
1855 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
|
|
1856 | object is created, you can also do that at a later time by calling |
|
|
1857 | C<starttls>. |
|
|
1858 | |
|
|
1859 | Starting TLS is currently an asynchronous operation - when you push some |
|
|
1860 | write data and then call C<< ->starttls >> then TLS negotiation will start |
|
|
1861 | immediately, after which the queued write data is then sent. |
|
|
1862 | |
|
|
1863 | The first argument is the same as the C<tls> constructor argument (either |
|
|
1864 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
|
|
1865 | |
|
|
1866 | The second argument is the optional C<AnyEvent::TLS> object that is used |
|
|
1867 | when AnyEvent::Handle has to create its own TLS connection object, or |
|
|
1868 | a hash reference with C<< key => value >> pairs that will be used to |
|
|
1869 | construct a new context. |
|
|
1870 | |
|
|
1871 | The TLS connection object will end up in C<< $handle->{tls} >>, the TLS |
|
|
1872 | context in C<< $handle->{tls_ctx} >> after this call and can be used or |
|
|
1873 | changed to your liking. Note that the handshake might have already started |
|
|
1874 | when this function returns. |
|
|
1875 | |
|
|
1876 | Due to bugs in OpenSSL, it might or might not be possible to do multiple |
|
|
1877 | handshakes on the same stream. It is best to not attempt to use the |
|
|
1878 | stream after stopping TLS. |
|
|
1879 | |
|
|
1880 | This method may invoke callbacks (and therefore the handle might be |
|
|
1881 | destroyed after it returns). |
|
|
1882 | |
|
|
1883 | =cut |
|
|
1884 | |
|
|
1885 | our %TLS_CACHE; #TODO not yet documented, should we? |
|
|
1886 | |
|
|
1887 | sub starttls { |
|
|
1888 | my ($self, $tls, $ctx) = @_; |
|
|
1889 | |
|
|
1890 | Carp::croak "It is an error to call starttls on an AnyEvent::Handle object while TLS is already active, caught" |
|
|
1891 | if $self->{tls}; |
|
|
1892 | |
|
|
1893 | $self->{tls} = $tls; |
|
|
1894 | $self->{tls_ctx} = $ctx if @_ > 2; |
|
|
1895 | |
|
|
1896 | return unless $self->{fh}; |
|
|
1897 | |
|
|
1898 | require Net::SSLeay; |
|
|
1899 | |
|
|
1900 | $ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL (); |
|
|
1901 | $ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ (); |
|
|
1902 | |
|
|
1903 | $tls = delete $self->{tls}; |
|
|
1904 | $ctx = $self->{tls_ctx}; |
|
|
1905 | |
|
|
1906 | local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session |
|
|
1907 | |
|
|
1908 | if ("HASH" eq ref $ctx) { |
|
|
1909 | require AnyEvent::TLS; |
|
|
1910 | |
|
|
1911 | if ($ctx->{cache}) { |
|
|
1912 | my $key = $ctx+0; |
|
|
1913 | $ctx = $TLS_CACHE{$key} ||= new AnyEvent::TLS %$ctx; |
|
|
1914 | } else { |
|
|
1915 | $ctx = new AnyEvent::TLS %$ctx; |
|
|
1916 | } |
|
|
1917 | } |
|
|
1918 | |
|
|
1919 | $self->{tls_ctx} = $ctx || TLS_CTX (); |
|
|
1920 | $self->{tls} = $tls = $self->{tls_ctx}->_get_session ($tls, $self, $self->{peername}); |
|
|
1921 | |
|
|
1922 | # basically, this is deep magic (because SSL_read should have the same issues) |
|
|
1923 | # but the openssl maintainers basically said: "trust us, it just works". |
|
|
1924 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
|
|
1925 | # and mismaintained ssleay-module doesn't even offer them). |
|
|
1926 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
|
|
1927 | # |
|
|
1928 | # in short: this is a mess. |
|
|
1929 | # |
|
|
1930 | # note that we do not try to keep the length constant between writes as we are required to do. |
|
|
1931 | # we assume that most (but not all) of this insanity only applies to non-blocking cases, |
|
|
1932 | # and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to |
|
|
1933 | # have identity issues in that area. |
|
|
1934 | # Net::SSLeay::CTX_set_mode ($ssl, |
|
|
1935 | # (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
|
|
1936 | # | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
|
|
1937 | Net::SSLeay::CTX_set_mode ($tls, 1|2); |
|
|
1938 | |
|
|
1939 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
|
|
1940 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
|
|
1941 | |
|
|
1942 | Net::SSLeay::BIO_write ($self->{_rbio}, delete $self->{rbuf}); |
|
|
1943 | |
|
|
1944 | Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio}); |
|
|
1945 | |
|
|
1946 | $self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) } |
|
|
1947 | if $self->{on_starttls}; |
|
|
1948 | |
|
|
1949 | &_dotls; # need to trigger the initial handshake |
|
|
1950 | $self->start_read; # make sure we actually do read |
|
|
1951 | } |
|
|
1952 | |
|
|
1953 | =item $handle->stoptls |
|
|
1954 | |
|
|
1955 | Shuts down the SSL connection - this makes a proper EOF handshake by |
|
|
1956 | sending a close notify to the other side, but since OpenSSL doesn't |
|
|
1957 | support non-blocking shut downs, it is not guaranteed that you can re-use |
|
|
1958 | the stream afterwards. |
|
|
1959 | |
|
|
1960 | This method may invoke callbacks (and therefore the handle might be |
|
|
1961 | destroyed after it returns). |
|
|
1962 | |
|
|
1963 | =cut |
|
|
1964 | |
|
|
1965 | sub stoptls { |
|
|
1966 | my ($self) = @_; |
|
|
1967 | |
|
|
1968 | if ($self->{tls} && $self->{fh}) { |
|
|
1969 | Net::SSLeay::shutdown ($self->{tls}); |
|
|
1970 | |
|
|
1971 | &_dotls; |
|
|
1972 | |
|
|
1973 | # # we don't give a shit. no, we do, but we can't. no...#d# |
|
|
1974 | # # we, we... have to use openssl :/#d# |
|
|
1975 | # &_freetls;#d# |
|
|
1976 | } |
|
|
1977 | } |
|
|
1978 | |
|
|
1979 | sub _freetls { |
|
|
1980 | my ($self) = @_; |
|
|
1981 | |
|
|
1982 | return unless $self->{tls}; |
|
|
1983 | |
|
|
1984 | $self->{tls_ctx}->_put_session (delete $self->{tls}) |
|
|
1985 | if $self->{tls} > 0; |
|
|
1986 | |
|
|
1987 | delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)}; |
|
|
1988 | } |
|
|
1989 | |
|
|
1990 | sub DESTROY { |
|
|
1991 | my ($self) = @_; |
|
|
1992 | |
|
|
1993 | &_freetls; |
|
|
1994 | |
|
|
1995 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
|
|
1996 | |
|
|
1997 | if ($linger && length $self->{wbuf} && $self->{fh}) { |
|
|
1998 | my $fh = delete $self->{fh}; |
|
|
1999 | my $wbuf = delete $self->{wbuf}; |
|
|
2000 | |
|
|
2001 | my @linger; |
|
|
2002 | |
|
|
2003 | push @linger, AE::io $fh, 1, sub { |
|
|
2004 | my $len = syswrite $fh, $wbuf, length $wbuf; |
|
|
2005 | |
|
|
2006 | if ($len > 0) { |
|
|
2007 | substr $wbuf, 0, $len, ""; |
|
|
2008 | } else { |
|
|
2009 | @linger = (); # end |
|
|
2010 | } |
597 | }); |
2011 | }; |
|
|
2012 | push @linger, AE::timer $linger, 0, sub { |
|
|
2013 | @linger = (); |
|
|
2014 | }; |
|
|
2015 | } |
|
|
2016 | } |
|
|
2017 | |
|
|
2018 | =item $handle->destroy |
|
|
2019 | |
|
|
2020 | Shuts down the handle object as much as possible - this call ensures that |
|
|
2021 | no further callbacks will be invoked and as many resources as possible |
|
|
2022 | will be freed. Any method you will call on the handle object after |
|
|
2023 | destroying it in this way will be silently ignored (and it will return the |
|
|
2024 | empty list). |
|
|
2025 | |
|
|
2026 | Normally, you can just "forget" any references to an AnyEvent::Handle |
|
|
2027 | object and it will simply shut down. This works in fatal error and EOF |
|
|
2028 | callbacks, as well as code outside. It does I<NOT> work in a read or write |
|
|
2029 | callback, so when you want to destroy the AnyEvent::Handle object from |
|
|
2030 | within such an callback. You I<MUST> call C<< ->destroy >> explicitly in |
|
|
2031 | that case. |
|
|
2032 | |
|
|
2033 | Destroying the handle object in this way has the advantage that callbacks |
|
|
2034 | will be removed as well, so if those are the only reference holders (as |
|
|
2035 | is common), then one doesn't need to do anything special to break any |
|
|
2036 | reference cycles. |
|
|
2037 | |
|
|
2038 | The handle might still linger in the background and write out remaining |
|
|
2039 | data, as specified by the C<linger> option, however. |
|
|
2040 | |
|
|
2041 | =cut |
|
|
2042 | |
|
|
2043 | sub destroy { |
|
|
2044 | my ($self) = @_; |
|
|
2045 | |
|
|
2046 | $self->DESTROY; |
|
|
2047 | %$self = (); |
|
|
2048 | bless $self, "AnyEvent::Handle::destroyed"; |
|
|
2049 | } |
|
|
2050 | |
|
|
2051 | sub AnyEvent::Handle::destroyed::AUTOLOAD { |
|
|
2052 | #nop |
|
|
2053 | } |
|
|
2054 | |
|
|
2055 | =item $handle->destroyed |
|
|
2056 | |
|
|
2057 | Returns false as long as the handle hasn't been destroyed by a call to C<< |
|
|
2058 | ->destroy >>, true otherwise. |
|
|
2059 | |
|
|
2060 | Can be useful to decide whether the handle is still valid after some |
|
|
2061 | callback possibly destroyed the handle. For example, C<< ->push_write >>, |
|
|
2062 | C<< ->starttls >> and other methods can call user callbacks, which in turn |
|
|
2063 | can destroy the handle, so work can be avoided by checking sometimes: |
|
|
2064 | |
|
|
2065 | $hdl->starttls ("accept"); |
|
|
2066 | return if $hdl->destroyed; |
|
|
2067 | $hdl->push_write (... |
|
|
2068 | |
|
|
2069 | Note that the call to C<push_write> will silently be ignored if the handle |
|
|
2070 | has been destroyed, so often you can just ignore the possibility of the |
|
|
2071 | handle being destroyed. |
|
|
2072 | |
|
|
2073 | =cut |
|
|
2074 | |
|
|
2075 | sub destroyed { 0 } |
|
|
2076 | sub AnyEvent::Handle::destroyed::destroyed { 1 } |
|
|
2077 | |
|
|
2078 | =item AnyEvent::Handle::TLS_CTX |
|
|
2079 | |
|
|
2080 | This function creates and returns the AnyEvent::TLS object used by default |
|
|
2081 | for TLS mode. |
|
|
2082 | |
|
|
2083 | The context is created by calling L<AnyEvent::TLS> without any arguments. |
|
|
2084 | |
|
|
2085 | =cut |
|
|
2086 | |
|
|
2087 | our $TLS_CTX; |
|
|
2088 | |
|
|
2089 | sub TLS_CTX() { |
|
|
2090 | $TLS_CTX ||= do { |
|
|
2091 | require AnyEvent::TLS; |
|
|
2092 | |
|
|
2093 | new AnyEvent::TLS |
598 | } |
2094 | } |
599 | } |
2095 | } |
600 | |
2096 | |
601 | =back |
2097 | =back |
602 | |
2098 | |
|
|
2099 | |
|
|
2100 | =head1 NONFREQUENTLY ASKED QUESTIONS |
|
|
2101 | |
|
|
2102 | =over 4 |
|
|
2103 | |
|
|
2104 | =item I C<undef> the AnyEvent::Handle reference inside my callback and |
|
|
2105 | still get further invocations! |
|
|
2106 | |
|
|
2107 | That's because AnyEvent::Handle keeps a reference to itself when handling |
|
|
2108 | read or write callbacks. |
|
|
2109 | |
|
|
2110 | It is only safe to "forget" the reference inside EOF or error callbacks, |
|
|
2111 | from within all other callbacks, you need to explicitly call the C<< |
|
|
2112 | ->destroy >> method. |
|
|
2113 | |
|
|
2114 | =item I get different callback invocations in TLS mode/Why can't I pause |
|
|
2115 | reading? |
|
|
2116 | |
|
|
2117 | Unlike, say, TCP, TLS connections do not consist of two independent |
|
|
2118 | communication channels, one for each direction. Or put differently, the |
|
|
2119 | read and write directions are not independent of each other: you cannot |
|
|
2120 | write data unless you are also prepared to read, and vice versa. |
|
|
2121 | |
|
|
2122 | This means that, in TLS mode, you might get C<on_error> or C<on_eof> |
|
|
2123 | callback invocations when you are not expecting any read data - the reason |
|
|
2124 | is that AnyEvent::Handle always reads in TLS mode. |
|
|
2125 | |
|
|
2126 | During the connection, you have to make sure that you always have a |
|
|
2127 | non-empty read-queue, or an C<on_read> watcher. At the end of the |
|
|
2128 | connection (or when you no longer want to use it) you can call the |
|
|
2129 | C<destroy> method. |
|
|
2130 | |
|
|
2131 | =item How do I read data until the other side closes the connection? |
|
|
2132 | |
|
|
2133 | If you just want to read your data into a perl scalar, the easiest way |
|
|
2134 | to achieve this is by setting an C<on_read> callback that does nothing, |
|
|
2135 | clearing the C<on_eof> callback and in the C<on_error> callback, the data |
|
|
2136 | will be in C<$_[0]{rbuf}>: |
|
|
2137 | |
|
|
2138 | $handle->on_read (sub { }); |
|
|
2139 | $handle->on_eof (undef); |
|
|
2140 | $handle->on_error (sub { |
|
|
2141 | my $data = delete $_[0]{rbuf}; |
|
|
2142 | }); |
|
|
2143 | |
|
|
2144 | The reason to use C<on_error> is that TCP connections, due to latencies |
|
|
2145 | and packets loss, might get closed quite violently with an error, when in |
|
|
2146 | fact all data has been received. |
|
|
2147 | |
|
|
2148 | It is usually better to use acknowledgements when transferring data, |
|
|
2149 | to make sure the other side hasn't just died and you got the data |
|
|
2150 | intact. This is also one reason why so many internet protocols have an |
|
|
2151 | explicit QUIT command. |
|
|
2152 | |
|
|
2153 | =item I don't want to destroy the handle too early - how do I wait until |
|
|
2154 | all data has been written? |
|
|
2155 | |
|
|
2156 | After writing your last bits of data, set the C<on_drain> callback |
|
|
2157 | and destroy the handle in there - with the default setting of |
|
|
2158 | C<low_water_mark> this will be called precisely when all data has been |
|
|
2159 | written to the socket: |
|
|
2160 | |
|
|
2161 | $handle->push_write (...); |
|
|
2162 | $handle->on_drain (sub { |
|
|
2163 | warn "all data submitted to the kernel\n"; |
|
|
2164 | undef $handle; |
|
|
2165 | }); |
|
|
2166 | |
|
|
2167 | If you just want to queue some data and then signal EOF to the other side, |
|
|
2168 | consider using C<< ->push_shutdown >> instead. |
|
|
2169 | |
|
|
2170 | =item I want to contact a TLS/SSL server, I don't care about security. |
|
|
2171 | |
|
|
2172 | If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS, |
|
|
2173 | connect to it and then create the AnyEvent::Handle with the C<tls> |
|
|
2174 | parameter: |
|
|
2175 | |
|
|
2176 | tcp_connect $host, $port, sub { |
|
|
2177 | my ($fh) = @_; |
|
|
2178 | |
|
|
2179 | my $handle = new AnyEvent::Handle |
|
|
2180 | fh => $fh, |
|
|
2181 | tls => "connect", |
|
|
2182 | on_error => sub { ... }; |
|
|
2183 | |
|
|
2184 | $handle->push_write (...); |
|
|
2185 | }; |
|
|
2186 | |
|
|
2187 | =item I want to contact a TLS/SSL server, I do care about security. |
|
|
2188 | |
|
|
2189 | Then you should additionally enable certificate verification, including |
|
|
2190 | peername verification, if the protocol you use supports it (see |
|
|
2191 | L<AnyEvent::TLS>, C<verify_peername>). |
|
|
2192 | |
|
|
2193 | E.g. for HTTPS: |
|
|
2194 | |
|
|
2195 | tcp_connect $host, $port, sub { |
|
|
2196 | my ($fh) = @_; |
|
|
2197 | |
|
|
2198 | my $handle = new AnyEvent::Handle |
|
|
2199 | fh => $fh, |
|
|
2200 | peername => $host, |
|
|
2201 | tls => "connect", |
|
|
2202 | tls_ctx => { verify => 1, verify_peername => "https" }, |
|
|
2203 | ... |
|
|
2204 | |
|
|
2205 | Note that you must specify the hostname you connected to (or whatever |
|
|
2206 | "peername" the protocol needs) as the C<peername> argument, otherwise no |
|
|
2207 | peername verification will be done. |
|
|
2208 | |
|
|
2209 | The above will use the system-dependent default set of trusted CA |
|
|
2210 | certificates. If you want to check against a specific CA, add the |
|
|
2211 | C<ca_file> (or C<ca_cert>) arguments to C<tls_ctx>: |
|
|
2212 | |
|
|
2213 | tls_ctx => { |
|
|
2214 | verify => 1, |
|
|
2215 | verify_peername => "https", |
|
|
2216 | ca_file => "my-ca-cert.pem", |
|
|
2217 | }, |
|
|
2218 | |
|
|
2219 | =item I want to create a TLS/SSL server, how do I do that? |
|
|
2220 | |
|
|
2221 | Well, you first need to get a server certificate and key. You have |
|
|
2222 | three options: a) ask a CA (buy one, use cacert.org etc.) b) create a |
|
|
2223 | self-signed certificate (cheap. check the search engine of your choice, |
|
|
2224 | there are many tutorials on the net) or c) make your own CA (tinyca2 is a |
|
|
2225 | nice program for that purpose). |
|
|
2226 | |
|
|
2227 | Then create a file with your private key (in PEM format, see |
|
|
2228 | L<AnyEvent::TLS>), followed by the certificate (also in PEM format). The |
|
|
2229 | file should then look like this: |
|
|
2230 | |
|
|
2231 | -----BEGIN RSA PRIVATE KEY----- |
|
|
2232 | ...header data |
|
|
2233 | ... lots of base64'y-stuff |
|
|
2234 | -----END RSA PRIVATE KEY----- |
|
|
2235 | |
|
|
2236 | -----BEGIN CERTIFICATE----- |
|
|
2237 | ... lots of base64'y-stuff |
|
|
2238 | -----END CERTIFICATE----- |
|
|
2239 | |
|
|
2240 | The important bits are the "PRIVATE KEY" and "CERTIFICATE" parts. Then |
|
|
2241 | specify this file as C<cert_file>: |
|
|
2242 | |
|
|
2243 | tcp_server undef, $port, sub { |
|
|
2244 | my ($fh) = @_; |
|
|
2245 | |
|
|
2246 | my $handle = new AnyEvent::Handle |
|
|
2247 | fh => $fh, |
|
|
2248 | tls => "accept", |
|
|
2249 | tls_ctx => { cert_file => "my-server-keycert.pem" }, |
|
|
2250 | ... |
|
|
2251 | |
|
|
2252 | When you have intermediate CA certificates that your clients might not |
|
|
2253 | know about, just append them to the C<cert_file>. |
|
|
2254 | |
|
|
2255 | =back |
|
|
2256 | |
|
|
2257 | |
|
|
2258 | =head1 SUBCLASSING AnyEvent::Handle |
|
|
2259 | |
|
|
2260 | In many cases, you might want to subclass AnyEvent::Handle. |
|
|
2261 | |
|
|
2262 | To make this easier, a given version of AnyEvent::Handle uses these |
|
|
2263 | conventions: |
|
|
2264 | |
|
|
2265 | =over 4 |
|
|
2266 | |
|
|
2267 | =item * all constructor arguments become object members. |
|
|
2268 | |
|
|
2269 | At least initially, when you pass a C<tls>-argument to the constructor it |
|
|
2270 | will end up in C<< $handle->{tls} >>. Those members might be changed or |
|
|
2271 | mutated later on (for example C<tls> will hold the TLS connection object). |
|
|
2272 | |
|
|
2273 | =item * other object member names are prefixed with an C<_>. |
|
|
2274 | |
|
|
2275 | All object members not explicitly documented (internal use) are prefixed |
|
|
2276 | with an underscore character, so the remaining non-C<_>-namespace is free |
|
|
2277 | for use for subclasses. |
|
|
2278 | |
|
|
2279 | =item * all members not documented here and not prefixed with an underscore |
|
|
2280 | are free to use in subclasses. |
|
|
2281 | |
|
|
2282 | Of course, new versions of AnyEvent::Handle may introduce more "public" |
|
|
2283 | member variables, but that's just life. At least it is documented. |
|
|
2284 | |
|
|
2285 | =back |
|
|
2286 | |
603 | =head1 AUTHOR |
2287 | =head1 AUTHOR |
604 | |
2288 | |
605 | Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. |
2289 | Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. |
606 | |
2290 | |
607 | =cut |
2291 | =cut |