1 | package AnyEvent::Handle; |
1 | package AnyEvent::Handle; |
2 | |
2 | |
3 | no warnings; |
3 | no warnings; |
4 | use strict; |
4 | use strict qw(subs vars); |
5 | |
5 | |
6 | use AnyEvent (); |
6 | use AnyEvent (); |
7 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
7 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
8 | use Scalar::Util (); |
8 | use Scalar::Util (); |
9 | use Carp (); |
9 | use Carp (); |
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14 | |
14 | |
15 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
15 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
16 | |
16 | |
17 | =cut |
17 | =cut |
18 | |
18 | |
19 | our $VERSION = 4.22; |
19 | our $VERSION = 4.42; |
20 | |
20 | |
21 | =head1 SYNOPSIS |
21 | =head1 SYNOPSIS |
22 | |
22 | |
23 | use AnyEvent; |
23 | use AnyEvent; |
24 | use AnyEvent::Handle; |
24 | use AnyEvent::Handle; |
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27 | |
27 | |
28 | my $handle = |
28 | my $handle = |
29 | AnyEvent::Handle->new ( |
29 | AnyEvent::Handle->new ( |
30 | fh => \*STDIN, |
30 | fh => \*STDIN, |
31 | on_eof => sub { |
31 | on_eof => sub { |
32 | $cv->broadcast; |
32 | $cv->send; |
33 | }, |
33 | }, |
34 | ); |
34 | ); |
35 | |
35 | |
36 | # send some request line |
36 | # send some request line |
37 | $handle->push_write ("getinfo\015\012"); |
37 | $handle->push_write ("getinfo\015\012"); |
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49 | |
49 | |
50 | This module is a helper module to make it easier to do event-based I/O on |
50 | This module is a helper module to make it easier to do event-based I/O on |
51 | filehandles. For utility functions for doing non-blocking connects and accepts |
51 | filehandles. For utility functions for doing non-blocking connects and accepts |
52 | on sockets see L<AnyEvent::Util>. |
52 | on sockets see L<AnyEvent::Util>. |
53 | |
53 | |
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54 | The L<AnyEvent::Intro> tutorial contains some well-documented |
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55 | AnyEvent::Handle examples. |
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56 | |
54 | In the following, when the documentation refers to of "bytes" then this |
57 | In the following, when the documentation refers to of "bytes" then this |
55 | means characters. As sysread and syswrite are used for all I/O, their |
58 | means characters. As sysread and syswrite are used for all I/O, their |
56 | treatment of characters applies to this module as well. |
59 | treatment of characters applies to this module as well. |
57 | |
60 | |
58 | All callbacks will be invoked with the handle object as their first |
61 | All callbacks will be invoked with the handle object as their first |
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70 | |
73 | |
71 | =item fh => $filehandle [MANDATORY] |
74 | =item fh => $filehandle [MANDATORY] |
72 | |
75 | |
73 | The filehandle this L<AnyEvent::Handle> object will operate on. |
76 | The filehandle this L<AnyEvent::Handle> object will operate on. |
74 | |
77 | |
75 | NOTE: The filehandle will be set to non-blocking (using |
78 | NOTE: The filehandle will be set to non-blocking mode (using |
76 | AnyEvent::Util::fh_nonblocking). |
79 | C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in |
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80 | that mode. |
77 | |
81 | |
78 | =item on_eof => $cb->($handle) |
82 | =item on_eof => $cb->($handle) |
79 | |
83 | |
80 | Set the callback to be called when an end-of-file condition is detected, |
84 | Set the callback to be called when an end-of-file condition is detected, |
81 | i.e. in the case of a socket, when the other side has closed the |
85 | i.e. in the case of a socket, when the other side has closed the |
82 | connection cleanly. |
86 | connection cleanly. |
83 | |
87 | |
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88 | For sockets, this just means that the other side has stopped sending data, |
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89 | you can still try to write data, and, in fact, one can return from the EOF |
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90 | callback and continue writing data, as only the read part has been shut |
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91 | down. |
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92 | |
84 | While not mandatory, it is highly recommended to set an eof callback, |
93 | While not mandatory, it is I<highly> recommended to set an EOF callback, |
85 | otherwise you might end up with a closed socket while you are still |
94 | otherwise you might end up with a closed socket while you are still |
86 | waiting for data. |
95 | waiting for data. |
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96 | |
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97 | If an EOF condition has been detected but no C<on_eof> callback has been |
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98 | set, then a fatal error will be raised with C<$!> set to <0>. |
87 | |
99 | |
88 | =item on_error => $cb->($handle, $fatal) |
100 | =item on_error => $cb->($handle, $fatal) |
89 | |
101 | |
90 | This is the error callback, which is called when, well, some error |
102 | This is the error callback, which is called when, well, some error |
91 | occured, such as not being able to resolve the hostname, failure to |
103 | occured, such as not being able to resolve the hostname, failure to |
92 | connect or a read error. |
104 | connect or a read error. |
93 | |
105 | |
94 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
106 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
95 | fatal errors the handle object will be shut down and will not be |
107 | fatal errors the handle object will be shut down and will not be usable |
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108 | (but you are free to look at the current C<< ->rbuf >>). Examples of fatal |
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109 | errors are an EOF condition with active (but unsatisifable) read watchers |
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110 | (C<EPIPE>) or I/O errors. |
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111 | |
96 | usable. Non-fatal errors can be retried by simply returning, but it is |
112 | Non-fatal errors can be retried by simply returning, but it is recommended |
97 | recommended to simply ignore this parameter and instead abondon the handle |
113 | to simply ignore this parameter and instead abondon the handle object |
98 | object when this callback is invoked. |
114 | when this callback is invoked. Examples of non-fatal errors are timeouts |
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115 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
99 | |
116 | |
100 | On callback entrance, the value of C<$!> contains the operating system |
117 | On callback entrance, the value of C<$!> contains the operating system |
101 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
118 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
102 | |
119 | |
103 | While not mandatory, it is I<highly> recommended to set this callback, as |
120 | While not mandatory, it is I<highly> recommended to set this callback, as |
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110 | and no read request is in the queue (unlike read queue callbacks, this |
127 | and no read request is in the queue (unlike read queue callbacks, this |
111 | callback will only be called when at least one octet of data is in the |
128 | callback will only be called when at least one octet of data is in the |
112 | read buffer). |
129 | read buffer). |
113 | |
130 | |
114 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
131 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
115 | method or access the C<$handle->{rbuf}> member directly. |
132 | method or access the C<$handle->{rbuf}> member directly. Note that you |
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133 | must not enlarge or modify the read buffer, you can only remove data at |
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134 | the beginning from it. |
116 | |
135 | |
117 | When an EOF condition is detected then AnyEvent::Handle will first try to |
136 | When an EOF condition is detected then AnyEvent::Handle will first try to |
118 | feed all the remaining data to the queued callbacks and C<on_read> before |
137 | feed all the remaining data to the queued callbacks and C<on_read> before |
119 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
138 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
120 | error will be raised (with C<$!> set to C<EPIPE>). |
139 | error will be raised (with C<$!> set to C<EPIPE>). |
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135 | =item timeout => $fractional_seconds |
154 | =item timeout => $fractional_seconds |
136 | |
155 | |
137 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
156 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
138 | seconds pass without a successful read or write on the underlying file |
157 | seconds pass without a successful read or write on the underlying file |
139 | handle, the C<on_timeout> callback will be invoked (and if that one is |
158 | handle, the C<on_timeout> callback will be invoked (and if that one is |
140 | missing, an C<ETIMEDOUT> error will be raised). |
159 | missing, a non-fatal C<ETIMEDOUT> error will be raised). |
141 | |
160 | |
142 | Note that timeout processing is also active when you currently do not have |
161 | Note that timeout processing is also active when you currently do not have |
143 | any outstanding read or write requests: If you plan to keep the connection |
162 | any outstanding read or write requests: If you plan to keep the connection |
144 | idle then you should disable the timout temporarily or ignore the timeout |
163 | idle then you should disable the timout temporarily or ignore the timeout |
145 | in the C<on_timeout> callback. |
164 | in the C<on_timeout> callback, in which case AnyEvent::Handle will simply |
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165 | restart the timeout. |
146 | |
166 | |
147 | Zero (the default) disables this timeout. |
167 | Zero (the default) disables this timeout. |
148 | |
168 | |
149 | =item on_timeout => $cb->($handle) |
169 | =item on_timeout => $cb->($handle) |
150 | |
170 | |
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154 | |
174 | |
155 | =item rbuf_max => <bytes> |
175 | =item rbuf_max => <bytes> |
156 | |
176 | |
157 | If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>) |
177 | If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>) |
158 | when the read buffer ever (strictly) exceeds this size. This is useful to |
178 | when the read buffer ever (strictly) exceeds this size. This is useful to |
159 | avoid denial-of-service attacks. |
179 | avoid some forms of denial-of-service attacks. |
160 | |
180 | |
161 | For example, a server accepting connections from untrusted sources should |
181 | For example, a server accepting connections from untrusted sources should |
162 | be configured to accept only so-and-so much data that it cannot act on |
182 | be configured to accept only so-and-so much data that it cannot act on |
163 | (for example, when expecting a line, an attacker could send an unlimited |
183 | (for example, when expecting a line, an attacker could send an unlimited |
164 | amount of data without a callback ever being called as long as the line |
184 | amount of data without a callback ever being called as long as the line |
165 | isn't finished). |
185 | isn't finished). |
166 | |
186 | |
167 | =item autocork => <boolean> |
187 | =item autocork => <boolean> |
168 | |
188 | |
169 | When disabled (the default), then C<push_write> will try to immediately |
189 | When disabled (the default), then C<push_write> will try to immediately |
170 | write the data to the handle if possible. This avoids having to register |
190 | write the data to the handle, if possible. This avoids having to register |
171 | a write watcher and wait for the next event loop iteration, but can be |
191 | a write watcher and wait for the next event loop iteration, but can |
172 | inefficient if you write multiple small chunks (this disadvantage is |
192 | be inefficient if you write multiple small chunks (on the wire, this |
173 | usually avoided by your kernel's nagle algorithm, see C<low_delay>). |
193 | disadvantage is usually avoided by your kernel's nagle algorithm, see |
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194 | C<no_delay>, but this option can save costly syscalls). |
174 | |
195 | |
175 | When enabled, then writes will always be queued till the next event loop |
196 | When enabled, then writes will always be queued till the next event loop |
176 | iteration. This is efficient when you do many small writes per iteration, |
197 | iteration. This is efficient when you do many small writes per iteration, |
177 | but less efficient when you do a single write only. |
198 | but less efficient when you do a single write only per iteration (or when |
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199 | the write buffer often is full). It also increases write latency. |
178 | |
200 | |
179 | =item no_delay => <boolean> |
201 | =item no_delay => <boolean> |
180 | |
202 | |
181 | When doing small writes on sockets, your operating system kernel might |
203 | When doing small writes on sockets, your operating system kernel might |
182 | wait a bit for more data before actually sending it out. This is called |
204 | wait a bit for more data before actually sending it out. This is called |
183 | the Nagle algorithm, and usually it is beneficial. |
205 | the Nagle algorithm, and usually it is beneficial. |
184 | |
206 | |
185 | In some situations you want as low a delay as possible, which cna be |
207 | In some situations you want as low a delay as possible, which can be |
186 | accomplishd by setting this option to true. |
208 | accomplishd by setting this option to a true value. |
187 | |
209 | |
188 | The default is your opertaing system's default behaviour, this option |
210 | The default is your opertaing system's default behaviour (most likely |
189 | explicitly enables or disables it, if possible. |
211 | enabled), this option explicitly enables or disables it, if possible. |
190 | |
212 | |
191 | =item read_size => <bytes> |
213 | =item read_size => <bytes> |
192 | |
214 | |
193 | The default read block size (the amount of bytes this module will try to read |
215 | The default read block size (the amount of bytes this module will |
194 | during each (loop iteration). Default: C<8192>. |
216 | try to read during each loop iteration, which affects memory |
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217 | requirements). Default: C<8192>. |
195 | |
218 | |
196 | =item low_water_mark => <bytes> |
219 | =item low_water_mark => <bytes> |
197 | |
220 | |
198 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
221 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
199 | buffer: If the write reaches this size or gets even samller it is |
222 | buffer: If the write reaches this size or gets even samller it is |
200 | considered empty. |
223 | considered empty. |
201 | |
224 | |
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225 | Sometimes it can be beneficial (for performance reasons) to add data to |
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226 | the write buffer before it is fully drained, but this is a rare case, as |
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227 | the operating system kernel usually buffers data as well, so the default |
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228 | is good in almost all cases. |
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229 | |
202 | =item linger => <seconds> |
230 | =item linger => <seconds> |
203 | |
231 | |
204 | If non-zero (default: C<3600>), then the destructor of the |
232 | If non-zero (default: C<3600>), then the destructor of the |
205 | AnyEvent::Handle object will check wether there is still outstanding write |
233 | AnyEvent::Handle object will check whether there is still outstanding |
206 | data and will install a watcher that will write out this data. No errors |
234 | write data and will install a watcher that will write this data to the |
207 | will be reported (this mostly matches how the operating system treats |
235 | socket. No errors will be reported (this mostly matches how the operating |
208 | outstanding data at socket close time). |
236 | system treats outstanding data at socket close time). |
209 | |
237 | |
210 | This will not work for partial TLS data that could not yet been |
238 | This will not work for partial TLS data that could not be encoded |
211 | encoded. This data will be lost. |
239 | yet. This data will be lost. Calling the C<stoptls> method in time might |
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240 | help. |
212 | |
241 | |
213 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
242 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
214 | |
243 | |
215 | When this parameter is given, it enables TLS (SSL) mode, that means it |
244 | When this parameter is given, it enables TLS (SSL) mode, that means |
216 | will start making tls handshake and will transparently encrypt/decrypt |
245 | AnyEvent will start a TLS handshake as soon as the conenction has been |
217 | data. |
246 | established and will transparently encrypt/decrypt data afterwards. |
218 | |
247 | |
219 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
248 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
220 | automatically when you try to create a TLS handle). |
249 | automatically when you try to create a TLS handle): this module doesn't |
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250 | have a dependency on that module, so if your module requires it, you have |
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251 | to add the dependency yourself. |
221 | |
252 | |
222 | For the TLS server side, use C<accept>, and for the TLS client side of a |
253 | Unlike TCP, TLS has a server and client side: for the TLS server side, use |
223 | connection, use C<connect> mode. |
254 | C<accept>, and for the TLS client side of a connection, use C<connect> |
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255 | mode. |
224 | |
256 | |
225 | You can also provide your own TLS connection object, but you have |
257 | You can also provide your own TLS connection object, but you have |
226 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
258 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
227 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
259 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
228 | AnyEvent::Handle. |
260 | AnyEvent::Handle. |
229 | |
261 | |
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262 | B<IMPORTANT:> since Net::SSLeay "objects" are really only integers, |
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263 | passing in the wrong integer will lead to certain crash. This most often |
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264 | happens when one uses a stylish C<< tls => 1 >> and is surprised about the |
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265 | segmentation fault. |
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266 | |
230 | See the C<starttls> method if you need to start TLS negotiation later. |
267 | See the C<< ->starttls >> method for when need to start TLS negotiation later. |
231 | |
268 | |
232 | =item tls_ctx => $ssl_ctx |
269 | =item tls_ctx => $ssl_ctx |
233 | |
270 | |
234 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
271 | Use the given C<Net::SSLeay::CTX> object to create the new TLS connection |
235 | (unless a connection object was specified directly). If this parameter is |
272 | (unless a connection object was specified directly). If this parameter is |
236 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
273 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
237 | |
274 | |
238 | =item json => JSON or JSON::XS object |
275 | =item json => JSON or JSON::XS object |
239 | |
276 | |
240 | This is the json coder object used by the C<json> read and write types. |
277 | This is the json coder object used by the C<json> read and write types. |
241 | |
278 | |
242 | If you don't supply it, then AnyEvent::Handle will create and use a |
279 | If you don't supply it, then AnyEvent::Handle will create and use a |
243 | suitable one, which will write and expect UTF-8 encoded JSON texts. |
280 | suitable one (on demand), which will write and expect UTF-8 encoded JSON |
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281 | texts. |
244 | |
282 | |
245 | Note that you are responsible to depend on the JSON module if you want to |
283 | Note that you are responsible to depend on the JSON module if you want to |
246 | use this functionality, as AnyEvent does not have a dependency itself. |
284 | use this functionality, as AnyEvent does not have a dependency itself. |
247 | |
285 | |
248 | =item filter_r => $cb |
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249 | |
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250 | =item filter_w => $cb |
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251 | |
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252 | These exist, but are undocumented at this time. |
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253 | |
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254 | =back |
286 | =back |
255 | |
287 | |
256 | =cut |
288 | =cut |
257 | |
289 | |
258 | sub new { |
290 | sub new { |
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262 | |
294 | |
263 | $self->{fh} or Carp::croak "mandatory argument fh is missing"; |
295 | $self->{fh} or Carp::croak "mandatory argument fh is missing"; |
264 | |
296 | |
265 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
297 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
266 | |
298 | |
267 | if ($self->{tls}) { |
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268 | require Net::SSLeay; |
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269 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
299 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}) |
270 | } |
300 | if $self->{tls}; |
271 | |
301 | |
272 | $self->{_activity} = AnyEvent->now; |
302 | $self->{_activity} = AnyEvent->now; |
273 | $self->_timeout; |
303 | $self->_timeout; |
274 | |
304 | |
275 | $self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain}; |
305 | $self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain}; |
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282 | } |
312 | } |
283 | |
313 | |
284 | sub _shutdown { |
314 | sub _shutdown { |
285 | my ($self) = @_; |
315 | my ($self) = @_; |
286 | |
316 | |
287 | delete $self->{_tw}; |
317 | delete @$self{qw(_tw _rw _ww fh rbuf wbuf on_read _queue)}; |
288 | delete $self->{_rw}; |
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289 | delete $self->{_ww}; |
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290 | delete $self->{fh}; |
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291 | |
318 | |
292 | $self->stoptls; |
319 | &_freetls; |
293 | } |
320 | } |
294 | |
321 | |
295 | sub _error { |
322 | sub _error { |
296 | my ($self, $errno, $fatal) = @_; |
323 | my ($self, $errno, $fatal) = @_; |
297 | |
324 | |
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300 | |
327 | |
301 | $! = $errno; |
328 | $! = $errno; |
302 | |
329 | |
303 | if ($self->{on_error}) { |
330 | if ($self->{on_error}) { |
304 | $self->{on_error}($self, $fatal); |
331 | $self->{on_error}($self, $fatal); |
305 | } else { |
332 | } elsif ($self->{fh}) { |
306 | Carp::croak "AnyEvent::Handle uncaught error: $!"; |
333 | Carp::croak "AnyEvent::Handle uncaught error: $!"; |
307 | } |
334 | } |
308 | } |
335 | } |
309 | |
336 | |
310 | =item $fh = $handle->fh |
337 | =item $fh = $handle->fh |
311 | |
338 | |
312 | This method returns the file handle of the L<AnyEvent::Handle> object. |
339 | This method returns the file handle used to create the L<AnyEvent::Handle> object. |
313 | |
340 | |
314 | =cut |
341 | =cut |
315 | |
342 | |
316 | sub fh { $_[0]{fh} } |
343 | sub fh { $_[0]{fh} } |
317 | |
344 | |
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335 | $_[0]{on_eof} = $_[1]; |
362 | $_[0]{on_eof} = $_[1]; |
336 | } |
363 | } |
337 | |
364 | |
338 | =item $handle->on_timeout ($cb) |
365 | =item $handle->on_timeout ($cb) |
339 | |
366 | |
340 | Replace the current C<on_timeout> callback, or disables the callback |
367 | Replace the current C<on_timeout> callback, or disables the callback (but |
341 | (but not the timeout) if C<$cb> = C<undef>. See C<timeout> constructor |
368 | not the timeout) if C<$cb> = C<undef>. See the C<timeout> constructor |
342 | argument. |
369 | argument and method. |
343 | |
370 | |
344 | =cut |
371 | =cut |
345 | |
372 | |
346 | sub on_timeout { |
373 | sub on_timeout { |
347 | $_[0]{on_timeout} = $_[1]; |
374 | $_[0]{on_timeout} = $_[1]; |
348 | } |
375 | } |
349 | |
376 | |
350 | =item $handle->autocork ($boolean) |
377 | =item $handle->autocork ($boolean) |
351 | |
378 | |
352 | Enables or disables the current autocork behaviour (see C<autocork> |
379 | Enables or disables the current autocork behaviour (see C<autocork> |
353 | constructor argument). |
380 | constructor argument). Changes will only take effect on the next write. |
354 | |
381 | |
355 | =cut |
382 | =cut |
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383 | |
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384 | sub autocork { |
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385 | $_[0]{autocork} = $_[1]; |
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386 | } |
356 | |
387 | |
357 | =item $handle->no_delay ($boolean) |
388 | =item $handle->no_delay ($boolean) |
358 | |
389 | |
359 | Enables or disables the C<no_delay> setting (see constructor argument of |
390 | Enables or disables the C<no_delay> setting (see constructor argument of |
360 | the same name for details). |
391 | the same name for details). |
… | |
… | |
453 | my ($self, $cb) = @_; |
484 | my ($self, $cb) = @_; |
454 | |
485 | |
455 | $self->{on_drain} = $cb; |
486 | $self->{on_drain} = $cb; |
456 | |
487 | |
457 | $cb->($self) |
488 | $cb->($self) |
458 | if $cb && $self->{low_water_mark} >= length $self->{wbuf}; |
489 | if $cb && $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}); |
459 | } |
490 | } |
460 | |
491 | |
461 | =item $handle->push_write ($data) |
492 | =item $handle->push_write ($data) |
462 | |
493 | |
463 | Queues the given scalar to be written. You can push as much data as you |
494 | Queues the given scalar to be written. You can push as much data as you |
… | |
… | |
480 | substr $self->{wbuf}, 0, $len, ""; |
511 | substr $self->{wbuf}, 0, $len, ""; |
481 | |
512 | |
482 | $self->{_activity} = AnyEvent->now; |
513 | $self->{_activity} = AnyEvent->now; |
483 | |
514 | |
484 | $self->{on_drain}($self) |
515 | $self->{on_drain}($self) |
485 | if $self->{low_water_mark} >= length $self->{wbuf} |
516 | if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}) |
486 | && $self->{on_drain}; |
517 | && $self->{on_drain}; |
487 | |
518 | |
488 | delete $self->{_ww} unless length $self->{wbuf}; |
519 | delete $self->{_ww} unless length $self->{wbuf}; |
489 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
520 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
490 | $self->_error ($!, 1); |
521 | $self->_error ($!, 1); |
… | |
… | |
514 | |
545 | |
515 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
546 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
516 | ->($self, @_); |
547 | ->($self, @_); |
517 | } |
548 | } |
518 | |
549 | |
519 | if ($self->{filter_w}) { |
550 | if ($self->{tls}) { |
520 | $self->{filter_w}($self, \$_[0]); |
551 | $self->{_tls_wbuf} .= $_[0]; |
|
|
552 | |
|
|
553 | &_dotls ($self); |
521 | } else { |
554 | } else { |
522 | $self->{wbuf} .= $_[0]; |
555 | $self->{wbuf} .= $_[0]; |
523 | $self->_drain_wbuf; |
556 | $self->_drain_wbuf; |
524 | } |
557 | } |
525 | } |
558 | } |
… | |
… | |
542 | =cut |
575 | =cut |
543 | |
576 | |
544 | register_write_type netstring => sub { |
577 | register_write_type netstring => sub { |
545 | my ($self, $string) = @_; |
578 | my ($self, $string) = @_; |
546 | |
579 | |
547 | sprintf "%d:%s,", (length $string), $string |
580 | (length $string) . ":$string," |
548 | }; |
581 | }; |
549 | |
582 | |
550 | =item packstring => $format, $data |
583 | =item packstring => $format, $data |
551 | |
584 | |
552 | An octet string prefixed with an encoded length. The encoding C<$format> |
585 | An octet string prefixed with an encoded length. The encoding C<$format> |
… | |
… | |
726 | |
759 | |
727 | if ( |
760 | if ( |
728 | defined $self->{rbuf_max} |
761 | defined $self->{rbuf_max} |
729 | && $self->{rbuf_max} < length $self->{rbuf} |
762 | && $self->{rbuf_max} < length $self->{rbuf} |
730 | ) { |
763 | ) { |
731 | return $self->_error (&Errno::ENOSPC, 1); |
764 | $self->_error (&Errno::ENOSPC, 1), return; |
732 | } |
765 | } |
733 | |
766 | |
734 | while () { |
767 | while () { |
735 | no strict 'refs'; |
768 | # we need to use a separate tls read buffer, as we must not receive data while |
|
|
769 | # we are draining the buffer, and this can only happen with TLS. |
|
|
770 | $self->{rbuf} .= delete $self->{_tls_rbuf} if exists $self->{_tls_rbuf}; |
736 | |
771 | |
737 | my $len = length $self->{rbuf}; |
772 | my $len = length $self->{rbuf}; |
738 | |
773 | |
739 | if (my $cb = shift @{ $self->{_queue} }) { |
774 | if (my $cb = shift @{ $self->{_queue} }) { |
740 | unless ($cb->($self)) { |
775 | unless ($cb->($self)) { |
741 | if ($self->{_eof}) { |
776 | if ($self->{_eof}) { |
742 | # no progress can be made (not enough data and no data forthcoming) |
777 | # no progress can be made (not enough data and no data forthcoming) |
743 | $self->_error (&Errno::EPIPE, 1), last; |
778 | $self->_error (&Errno::EPIPE, 1), return; |
744 | } |
779 | } |
745 | |
780 | |
746 | unshift @{ $self->{_queue} }, $cb; |
781 | unshift @{ $self->{_queue} }, $cb; |
747 | last; |
782 | last; |
748 | } |
783 | } |
… | |
… | |
756 | && !@{ $self->{_queue} } # and the queue is still empty |
791 | && !@{ $self->{_queue} } # and the queue is still empty |
757 | && $self->{on_read} # but we still have on_read |
792 | && $self->{on_read} # but we still have on_read |
758 | ) { |
793 | ) { |
759 | # no further data will arrive |
794 | # no further data will arrive |
760 | # so no progress can be made |
795 | # so no progress can be made |
761 | $self->_error (&Errno::EPIPE, 1), last |
796 | $self->_error (&Errno::EPIPE, 1), return |
762 | if $self->{_eof}; |
797 | if $self->{_eof}; |
763 | |
798 | |
764 | last; # more data might arrive |
799 | last; # more data might arrive |
765 | } |
800 | } |
766 | } else { |
801 | } else { |
767 | # read side becomes idle |
802 | # read side becomes idle |
768 | delete $self->{_rw}; |
803 | delete $self->{_rw} unless $self->{tls}; |
769 | last; |
804 | last; |
770 | } |
805 | } |
771 | } |
806 | } |
772 | |
807 | |
|
|
808 | if ($self->{_eof}) { |
|
|
809 | if ($self->{on_eof}) { |
773 | $self->{on_eof}($self) |
810 | $self->{on_eof}($self) |
774 | if $self->{_eof} && $self->{on_eof}; |
811 | } else { |
|
|
812 | $self->_error (0, 1); |
|
|
813 | } |
|
|
814 | } |
775 | |
815 | |
776 | # may need to restart read watcher |
816 | # may need to restart read watcher |
777 | unless ($self->{_rw}) { |
817 | unless ($self->{_rw}) { |
778 | $self->start_read |
818 | $self->start_read |
779 | if $self->{on_read} || @{ $self->{_queue} }; |
819 | if $self->{on_read} || @{ $self->{_queue} }; |
… | |
… | |
797 | |
837 | |
798 | =item $handle->rbuf |
838 | =item $handle->rbuf |
799 | |
839 | |
800 | Returns the read buffer (as a modifiable lvalue). |
840 | Returns the read buffer (as a modifiable lvalue). |
801 | |
841 | |
802 | You can access the read buffer directly as the C<< ->{rbuf} >> member, if |
842 | You can access the read buffer directly as the C<< ->{rbuf} >> |
803 | you want. |
843 | member, if you want. However, the only operation allowed on the |
|
|
844 | read buffer (apart from looking at it) is removing data from its |
|
|
845 | beginning. Otherwise modifying or appending to it is not allowed and will |
|
|
846 | lead to hard-to-track-down bugs. |
804 | |
847 | |
805 | NOTE: The read buffer should only be used or modified if the C<on_read>, |
848 | NOTE: The read buffer should only be used or modified if the C<on_read>, |
806 | C<push_read> or C<unshift_read> methods are used. The other read methods |
849 | C<push_read> or C<unshift_read> methods are used. The other read methods |
807 | automatically manage the read buffer. |
850 | automatically manage the read buffer. |
808 | |
851 | |
… | |
… | |
904 | $len <= length $_[0]{rbuf} or return; |
947 | $len <= length $_[0]{rbuf} or return; |
905 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
948 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
906 | 1 |
949 | 1 |
907 | } |
950 | } |
908 | }; |
951 | }; |
909 | |
|
|
910 | # compatibility with older API |
|
|
911 | sub push_read_chunk { |
|
|
912 | $_[0]->push_read (chunk => $_[1], $_[2]); |
|
|
913 | } |
|
|
914 | |
|
|
915 | sub unshift_read_chunk { |
|
|
916 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
|
|
917 | } |
|
|
918 | |
952 | |
919 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
953 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
920 | |
954 | |
921 | The callback will be called only once a full line (including the end of |
955 | The callback will be called only once a full line (including the end of |
922 | line marker, C<$eol>) has been read. This line (excluding the end of line |
956 | line marker, C<$eol>) has been read. This line (excluding the end of line |
… | |
… | |
958 | $cb->($_[0], $1, $2); |
992 | $cb->($_[0], $1, $2); |
959 | 1 |
993 | 1 |
960 | } |
994 | } |
961 | } |
995 | } |
962 | }; |
996 | }; |
963 | |
|
|
964 | # compatibility with older API |
|
|
965 | sub push_read_line { |
|
|
966 | my $self = shift; |
|
|
967 | $self->push_read (line => @_); |
|
|
968 | } |
|
|
969 | |
|
|
970 | sub unshift_read_line { |
|
|
971 | my $self = shift; |
|
|
972 | $self->unshift_read (line => @_); |
|
|
973 | } |
|
|
974 | |
997 | |
975 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
998 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
976 | |
999 | |
977 | Makes a regex match against the regex object C<$accept> and returns |
1000 | Makes a regex match against the regex object C<$accept> and returns |
978 | everything up to and including the match. |
1001 | everything up to and including the match. |
… | |
… | |
1083 | An octet string prefixed with an encoded length. The encoding C<$format> |
1106 | An octet string prefixed with an encoded length. The encoding C<$format> |
1084 | uses the same format as a Perl C<pack> format, but must specify a single |
1107 | uses the same format as a Perl C<pack> format, but must specify a single |
1085 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
1108 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
1086 | optional C<!>, C<< < >> or C<< > >> modifier). |
1109 | optional C<!>, C<< < >> or C<< > >> modifier). |
1087 | |
1110 | |
1088 | DNS over TCP uses a prefix of C<n>, EPP uses a prefix of C<N>. |
1111 | For example, DNS over TCP uses a prefix of C<n> (2 octet network order), |
|
|
1112 | EPP uses a prefix of C<N> (4 octtes). |
1089 | |
1113 | |
1090 | Example: read a block of data prefixed by its length in BER-encoded |
1114 | Example: read a block of data prefixed by its length in BER-encoded |
1091 | format (very efficient). |
1115 | format (very efficient). |
1092 | |
1116 | |
1093 | $handle->push_read (packstring => "w", sub { |
1117 | $handle->push_read (packstring => "w", sub { |
… | |
… | |
1123 | } |
1147 | } |
1124 | }; |
1148 | }; |
1125 | |
1149 | |
1126 | =item json => $cb->($handle, $hash_or_arrayref) |
1150 | =item json => $cb->($handle, $hash_or_arrayref) |
1127 | |
1151 | |
1128 | Reads a JSON object or array, decodes it and passes it to the callback. |
1152 | Reads a JSON object or array, decodes it and passes it to the |
|
|
1153 | callback. When a parse error occurs, an C<EBADMSG> error will be raised. |
1129 | |
1154 | |
1130 | If a C<json> object was passed to the constructor, then that will be used |
1155 | If a C<json> object was passed to the constructor, then that will be used |
1131 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
1156 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
1132 | |
1157 | |
1133 | This read type uses the incremental parser available with JSON version |
1158 | This read type uses the incremental parser available with JSON version |
… | |
… | |
1150 | my $rbuf = \$self->{rbuf}; |
1175 | my $rbuf = \$self->{rbuf}; |
1151 | |
1176 | |
1152 | my $json = $self->{json} ||= JSON->new->utf8; |
1177 | my $json = $self->{json} ||= JSON->new->utf8; |
1153 | |
1178 | |
1154 | sub { |
1179 | sub { |
1155 | my $ref = $json->incr_parse ($self->{rbuf}); |
1180 | my $ref = eval { $json->incr_parse ($self->{rbuf}) }; |
1156 | |
1181 | |
1157 | if ($ref) { |
1182 | if ($ref) { |
1158 | $self->{rbuf} = $json->incr_text; |
1183 | $self->{rbuf} = $json->incr_text; |
1159 | $json->incr_text = ""; |
1184 | $json->incr_text = ""; |
1160 | $cb->($self, $ref); |
1185 | $cb->($self, $ref); |
1161 | |
1186 | |
1162 | 1 |
1187 | 1 |
|
|
1188 | } elsif ($@) { |
|
|
1189 | # error case |
|
|
1190 | $json->incr_skip; |
|
|
1191 | |
|
|
1192 | $self->{rbuf} = $json->incr_text; |
|
|
1193 | $json->incr_text = ""; |
|
|
1194 | |
|
|
1195 | $self->_error (&Errno::EBADMSG); |
|
|
1196 | |
|
|
1197 | () |
1163 | } else { |
1198 | } else { |
1164 | $self->{rbuf} = ""; |
1199 | $self->{rbuf} = ""; |
|
|
1200 | |
1165 | () |
1201 | () |
1166 | } |
1202 | } |
1167 | } |
1203 | } |
1168 | }; |
1204 | }; |
1169 | |
1205 | |
… | |
… | |
1246 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
1282 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
1247 | you change the C<on_read> callback or push/unshift a read callback, and it |
1283 | you change the C<on_read> callback or push/unshift a read callback, and it |
1248 | will automatically C<stop_read> for you when neither C<on_read> is set nor |
1284 | will automatically C<stop_read> for you when neither C<on_read> is set nor |
1249 | there are any read requests in the queue. |
1285 | there are any read requests in the queue. |
1250 | |
1286 | |
|
|
1287 | These methods will have no effect when in TLS mode (as TLS doesn't support |
|
|
1288 | half-duplex connections). |
|
|
1289 | |
1251 | =cut |
1290 | =cut |
1252 | |
1291 | |
1253 | sub stop_read { |
1292 | sub stop_read { |
1254 | my ($self) = @_; |
1293 | my ($self) = @_; |
1255 | |
1294 | |
1256 | delete $self->{_rw}; |
1295 | delete $self->{_rw} unless $self->{tls}; |
1257 | } |
1296 | } |
1258 | |
1297 | |
1259 | sub start_read { |
1298 | sub start_read { |
1260 | my ($self) = @_; |
1299 | my ($self) = @_; |
1261 | |
1300 | |
1262 | unless ($self->{_rw} || $self->{_eof}) { |
1301 | unless ($self->{_rw} || $self->{_eof}) { |
1263 | Scalar::Util::weaken $self; |
1302 | Scalar::Util::weaken $self; |
1264 | |
1303 | |
1265 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
1304 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
1266 | my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; |
1305 | my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf}); |
1267 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
1306 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
1268 | |
1307 | |
1269 | if ($len > 0) { |
1308 | if ($len > 0) { |
1270 | $self->{_activity} = AnyEvent->now; |
1309 | $self->{_activity} = AnyEvent->now; |
1271 | |
1310 | |
1272 | $self->{filter_r} |
1311 | if ($self->{tls}) { |
1273 | ? $self->{filter_r}($self, $rbuf) |
1312 | Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf); |
1274 | : $self->{_in_drain} || $self->_drain_rbuf; |
1313 | |
|
|
1314 | &_dotls ($self); |
|
|
1315 | } else { |
|
|
1316 | $self->_drain_rbuf unless $self->{_in_drain}; |
|
|
1317 | } |
1275 | |
1318 | |
1276 | } elsif (defined $len) { |
1319 | } elsif (defined $len) { |
1277 | delete $self->{_rw}; |
1320 | delete $self->{_rw}; |
1278 | $self->{_eof} = 1; |
1321 | $self->{_eof} = 1; |
1279 | $self->_drain_rbuf unless $self->{_in_drain}; |
1322 | $self->_drain_rbuf unless $self->{_in_drain}; |
… | |
… | |
1283 | } |
1326 | } |
1284 | }); |
1327 | }); |
1285 | } |
1328 | } |
1286 | } |
1329 | } |
1287 | |
1330 | |
|
|
1331 | # poll the write BIO and send the data if applicable |
1288 | sub _dotls { |
1332 | sub _dotls { |
1289 | my ($self) = @_; |
1333 | my ($self) = @_; |
1290 | |
1334 | |
1291 | my $buf; |
1335 | my $tmp; |
1292 | |
1336 | |
1293 | if (length $self->{_tls_wbuf}) { |
1337 | if (length $self->{_tls_wbuf}) { |
1294 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1338 | while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1295 | substr $self->{_tls_wbuf}, 0, $len, ""; |
1339 | substr $self->{_tls_wbuf}, 0, $tmp, ""; |
1296 | } |
1340 | } |
1297 | } |
1341 | } |
1298 | |
1342 | |
1299 | if (length ($buf = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
|
|
1300 | $self->{wbuf} .= $buf; |
|
|
1301 | $self->_drain_wbuf; |
|
|
1302 | } |
|
|
1303 | |
|
|
1304 | while (defined ($buf = Net::SSLeay::read ($self->{tls}))) { |
1343 | while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) { |
1305 | if (length $buf) { |
1344 | unless (length $tmp) { |
1306 | $self->{rbuf} .= $buf; |
|
|
1307 | $self->_drain_rbuf unless $self->{_in_drain}; |
|
|
1308 | } else { |
|
|
1309 | # let's treat SSL-eof as we treat normal EOF |
1345 | # let's treat SSL-eof as we treat normal EOF |
|
|
1346 | delete $self->{_rw}; |
1310 | $self->{_eof} = 1; |
1347 | $self->{_eof} = 1; |
1311 | $self->_shutdown; |
1348 | &_freetls; |
1312 | return; |
|
|
1313 | } |
1349 | } |
1314 | } |
|
|
1315 | |
1350 | |
|
|
1351 | $self->{_tls_rbuf} .= $tmp; |
|
|
1352 | $self->_drain_rbuf unless $self->{_in_drain}; |
|
|
1353 | $self->{tls} or return; # tls session might have gone away in callback |
|
|
1354 | } |
|
|
1355 | |
1316 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
1356 | $tmp = Net::SSLeay::get_error ($self->{tls}, -1); |
1317 | |
1357 | |
1318 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
1358 | if ($tmp != Net::SSLeay::ERROR_WANT_READ ()) { |
1319 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
1359 | if ($tmp == Net::SSLeay::ERROR_SYSCALL ()) { |
1320 | return $self->_error ($!, 1); |
1360 | return $self->_error ($!, 1); |
1321 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
1361 | } elsif ($tmp == Net::SSLeay::ERROR_SSL ()) { |
1322 | return $self->_error (&Errno::EIO, 1); |
1362 | return $self->_error (&Errno::EIO, 1); |
1323 | } |
1363 | } |
1324 | |
1364 | |
1325 | # all others are fine for our purposes |
1365 | # all other errors are fine for our purposes |
|
|
1366 | } |
|
|
1367 | |
|
|
1368 | while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
|
|
1369 | $self->{wbuf} .= $tmp; |
|
|
1370 | $self->_drain_wbuf; |
1326 | } |
1371 | } |
1327 | } |
1372 | } |
1328 | |
1373 | |
1329 | =item $handle->starttls ($tls[, $tls_ctx]) |
1374 | =item $handle->starttls ($tls[, $tls_ctx]) |
1330 | |
1375 | |
… | |
… | |
1340 | |
1385 | |
1341 | The TLS connection object will end up in C<< $handle->{tls} >> after this |
1386 | The TLS connection object will end up in C<< $handle->{tls} >> after this |
1342 | call and can be used or changed to your liking. Note that the handshake |
1387 | call and can be used or changed to your liking. Note that the handshake |
1343 | might have already started when this function returns. |
1388 | might have already started when this function returns. |
1344 | |
1389 | |
|
|
1390 | If it an error to start a TLS handshake more than once per |
|
|
1391 | AnyEvent::Handle object (this is due to bugs in OpenSSL). |
|
|
1392 | |
1345 | =cut |
1393 | =cut |
1346 | |
1394 | |
1347 | sub starttls { |
1395 | sub starttls { |
1348 | my ($self, $ssl, $ctx) = @_; |
1396 | my ($self, $ssl, $ctx) = @_; |
1349 | |
1397 | |
1350 | $self->stoptls; |
1398 | require Net::SSLeay; |
1351 | |
1399 | |
|
|
1400 | Carp::croak "it is an error to call starttls more than once on an AnyEvent::Handle object" |
|
|
1401 | if $self->{tls}; |
|
|
1402 | |
1352 | if ($ssl eq "accept") { |
1403 | if ($ssl eq "accept") { |
1353 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
1404 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
1354 | Net::SSLeay::set_accept_state ($ssl); |
1405 | Net::SSLeay::set_accept_state ($ssl); |
1355 | } elsif ($ssl eq "connect") { |
1406 | } elsif ($ssl eq "connect") { |
1356 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
1407 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
… | |
… | |
1362 | # basically, this is deep magic (because SSL_read should have the same issues) |
1413 | # basically, this is deep magic (because SSL_read should have the same issues) |
1363 | # but the openssl maintainers basically said: "trust us, it just works". |
1414 | # but the openssl maintainers basically said: "trust us, it just works". |
1364 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
1415 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
1365 | # and mismaintained ssleay-module doesn't even offer them). |
1416 | # and mismaintained ssleay-module doesn't even offer them). |
1366 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
1417 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
|
|
1418 | # |
|
|
1419 | # in short: this is a mess. |
|
|
1420 | # |
|
|
1421 | # note that we do not try to keep the length constant between writes as we are required to do. |
|
|
1422 | # we assume that most (but not all) of this insanity only applies to non-blocking cases, |
|
|
1423 | # and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to |
|
|
1424 | # have identity issues in that area. |
1367 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
1425 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
1368 | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
1426 | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
1369 | | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
1427 | | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
1370 | |
1428 | |
1371 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1429 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1372 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1430 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1373 | |
1431 | |
1374 | Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio}); |
1432 | Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio}); |
1375 | |
1433 | |
1376 | $self->{filter_w} = sub { |
1434 | &_dotls; # need to trigger the initial handshake |
1377 | $_[0]{_tls_wbuf} .= ${$_[1]}; |
1435 | $self->start_read; # make sure we actually do read |
1378 | &_dotls; |
|
|
1379 | }; |
|
|
1380 | $self->{filter_r} = sub { |
|
|
1381 | Net::SSLeay::BIO_write ($_[0]{_rbio}, ${$_[1]}); |
|
|
1382 | &_dotls; |
|
|
1383 | }; |
|
|
1384 | } |
1436 | } |
1385 | |
1437 | |
1386 | =item $handle->stoptls |
1438 | =item $handle->stoptls |
1387 | |
1439 | |
1388 | Destroys the SSL connection, if any. Partial read or write data will be |
1440 | Shuts down the SSL connection - this makes a proper EOF handshake by |
1389 | lost. |
1441 | sending a close notify to the other side, but since OpenSSL doesn't |
|
|
1442 | support non-blocking shut downs, it is not possible to re-use the stream |
|
|
1443 | afterwards. |
1390 | |
1444 | |
1391 | =cut |
1445 | =cut |
1392 | |
1446 | |
1393 | sub stoptls { |
1447 | sub stoptls { |
1394 | my ($self) = @_; |
1448 | my ($self) = @_; |
1395 | |
1449 | |
|
|
1450 | if ($self->{tls}) { |
|
|
1451 | Net::SSLeay::shutdown ($self->{tls}); |
|
|
1452 | |
|
|
1453 | &_dotls; |
|
|
1454 | |
|
|
1455 | # we don't give a shit. no, we do, but we can't. no... |
|
|
1456 | # we, we... have to use openssl :/ |
|
|
1457 | &_freetls; |
|
|
1458 | } |
|
|
1459 | } |
|
|
1460 | |
|
|
1461 | sub _freetls { |
|
|
1462 | my ($self) = @_; |
|
|
1463 | |
|
|
1464 | return unless $self->{tls}; |
|
|
1465 | |
1396 | Net::SSLeay::free (delete $self->{tls}) if $self->{tls}; |
1466 | Net::SSLeay::free (delete $self->{tls}); |
1397 | |
1467 | |
1398 | delete $self->{_rbio}; |
1468 | delete @$self{qw(_rbio _wbio _tls_wbuf)}; |
1399 | delete $self->{_wbio}; |
|
|
1400 | delete $self->{_tls_wbuf}; |
|
|
1401 | delete $self->{filter_r}; |
|
|
1402 | delete $self->{filter_w}; |
|
|
1403 | } |
1469 | } |
1404 | |
1470 | |
1405 | sub DESTROY { |
1471 | sub DESTROY { |
1406 | my $self = shift; |
1472 | my ($self) = @_; |
1407 | |
1473 | |
1408 | $self->stoptls; |
1474 | &_freetls; |
1409 | |
1475 | |
1410 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
1476 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
1411 | |
1477 | |
1412 | if ($linger && length $self->{wbuf}) { |
1478 | if ($linger && length $self->{wbuf}) { |
1413 | my $fh = delete $self->{fh}; |
1479 | my $fh = delete $self->{fh}; |
… | |
… | |
1428 | @linger = (); |
1494 | @linger = (); |
1429 | }); |
1495 | }); |
1430 | } |
1496 | } |
1431 | } |
1497 | } |
1432 | |
1498 | |
|
|
1499 | =item $handle->destroy |
|
|
1500 | |
|
|
1501 | Shuts down the handle object as much as possible - this call ensures that |
|
|
1502 | no further callbacks will be invoked and resources will be freed as much |
|
|
1503 | as possible. You must not call any methods on the object afterwards. |
|
|
1504 | |
|
|
1505 | Normally, you can just "forget" any references to an AnyEvent::Handle |
|
|
1506 | object and it will simply shut down. This works in fatal error and EOF |
|
|
1507 | callbacks, as well as code outside. It does I<NOT> work in a read or write |
|
|
1508 | callback, so when you want to destroy the AnyEvent::Handle object from |
|
|
1509 | within such an callback. You I<MUST> call C<< ->destroy >> explicitly in |
|
|
1510 | that case. |
|
|
1511 | |
|
|
1512 | The handle might still linger in the background and write out remaining |
|
|
1513 | data, as specified by the C<linger> option, however. |
|
|
1514 | |
|
|
1515 | =cut |
|
|
1516 | |
|
|
1517 | sub destroy { |
|
|
1518 | my ($self) = @_; |
|
|
1519 | |
|
|
1520 | $self->DESTROY; |
|
|
1521 | %$self = (); |
|
|
1522 | } |
|
|
1523 | |
1433 | =item AnyEvent::Handle::TLS_CTX |
1524 | =item AnyEvent::Handle::TLS_CTX |
1434 | |
1525 | |
1435 | This function creates and returns the Net::SSLeay::CTX object used by |
1526 | This function creates and returns the Net::SSLeay::CTX object used by |
1436 | default for TLS mode. |
1527 | default for TLS mode. |
1437 | |
1528 | |
… | |
… | |
1465 | } |
1556 | } |
1466 | } |
1557 | } |
1467 | |
1558 | |
1468 | =back |
1559 | =back |
1469 | |
1560 | |
|
|
1561 | |
|
|
1562 | =head1 NONFREQUENTLY ASKED QUESTIONS |
|
|
1563 | |
|
|
1564 | =over 4 |
|
|
1565 | |
|
|
1566 | =item I C<undef> the AnyEvent::Handle reference inside my callback and |
|
|
1567 | still get further invocations! |
|
|
1568 | |
|
|
1569 | That's because AnyEvent::Handle keeps a reference to itself when handling |
|
|
1570 | read or write callbacks. |
|
|
1571 | |
|
|
1572 | It is only safe to "forget" the reference inside EOF or error callbacks, |
|
|
1573 | from within all other callbacks, you need to explicitly call the C<< |
|
|
1574 | ->destroy >> method. |
|
|
1575 | |
|
|
1576 | =item I get different callback invocations in TLS mode/Why can't I pause |
|
|
1577 | reading? |
|
|
1578 | |
|
|
1579 | Unlike, say, TCP, TLS connections do not consist of two independent |
|
|
1580 | communication channels, one for each direction. Or put differently. The |
|
|
1581 | read and write directions are not independent of each other: you cannot |
|
|
1582 | write data unless you are also prepared to read, and vice versa. |
|
|
1583 | |
|
|
1584 | This can mean than, in TLS mode, you might get C<on_error> or C<on_eof> |
|
|
1585 | callback invocations when you are not expecting any read data - the reason |
|
|
1586 | is that AnyEvent::Handle always reads in TLS mode. |
|
|
1587 | |
|
|
1588 | During the connection, you have to make sure that you always have a |
|
|
1589 | non-empty read-queue, or an C<on_read> watcher. At the end of the |
|
|
1590 | connection (or when you no longer want to use it) you can call the |
|
|
1591 | C<destroy> method. |
|
|
1592 | |
|
|
1593 | =item How do I read data until the other side closes the connection? |
|
|
1594 | |
|
|
1595 | If you just want to read your data into a perl scalar, the easiest way |
|
|
1596 | to achieve this is by setting an C<on_read> callback that does nothing, |
|
|
1597 | clearing the C<on_eof> callback and in the C<on_error> callback, the data |
|
|
1598 | will be in C<$_[0]{rbuf}>: |
|
|
1599 | |
|
|
1600 | $handle->on_read (sub { }); |
|
|
1601 | $handle->on_eof (undef); |
|
|
1602 | $handle->on_error (sub { |
|
|
1603 | my $data = delete $_[0]{rbuf}; |
|
|
1604 | undef $handle; |
|
|
1605 | }); |
|
|
1606 | |
|
|
1607 | The reason to use C<on_error> is that TCP connections, due to latencies |
|
|
1608 | and packets loss, might get closed quite violently with an error, when in |
|
|
1609 | fact, all data has been received. |
|
|
1610 | |
|
|
1611 | It is usually better to use acknowledgements when transferring data, |
|
|
1612 | to make sure the other side hasn't just died and you got the data |
|
|
1613 | intact. This is also one reason why so many internet protocols have an |
|
|
1614 | explicit QUIT command. |
|
|
1615 | |
|
|
1616 | =item I don't want to destroy the handle too early - how do I wait until |
|
|
1617 | all data has been written? |
|
|
1618 | |
|
|
1619 | After writing your last bits of data, set the C<on_drain> callback |
|
|
1620 | and destroy the handle in there - with the default setting of |
|
|
1621 | C<low_water_mark> this will be called precisely when all data has been |
|
|
1622 | written to the socket: |
|
|
1623 | |
|
|
1624 | $handle->push_write (...); |
|
|
1625 | $handle->on_drain (sub { |
|
|
1626 | warn "all data submitted to the kernel\n"; |
|
|
1627 | undef $handle; |
|
|
1628 | }); |
|
|
1629 | |
|
|
1630 | =back |
|
|
1631 | |
|
|
1632 | |
1470 | =head1 SUBCLASSING AnyEvent::Handle |
1633 | =head1 SUBCLASSING AnyEvent::Handle |
1471 | |
1634 | |
1472 | In many cases, you might want to subclass AnyEvent::Handle. |
1635 | In many cases, you might want to subclass AnyEvent::Handle. |
1473 | |
1636 | |
1474 | To make this easier, a given version of AnyEvent::Handle uses these |
1637 | To make this easier, a given version of AnyEvent::Handle uses these |