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 (); |
… | |
… | |
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 = 4.14; |
19 | our $VERSION = 4.82; |
20 | |
20 | |
21 | =head1 SYNOPSIS |
21 | =head1 SYNOPSIS |
22 | |
22 | |
23 | use AnyEvent; |
23 | use AnyEvent; |
24 | use AnyEvent::Handle; |
24 | use AnyEvent::Handle; |
25 | |
25 | |
26 | my $cv = AnyEvent->condvar; |
26 | my $cv = AnyEvent->condvar; |
27 | |
27 | |
28 | my $handle = |
28 | my $hdl; $hdl = new AnyEvent::Handle |
29 | AnyEvent::Handle->new ( |
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30 | fh => \*STDIN, |
29 | fh => \*STDIN, |
31 | on_eof => sub { |
30 | on_error => sub { |
32 | $cv->broadcast; |
31 | warn "got error $_[2]\n"; |
33 | }, |
32 | $cv->send; |
34 | ); |
33 | ); |
35 | |
34 | |
36 | # send some request line |
35 | # send some request line |
37 | $handle->push_write ("getinfo\015\012"); |
36 | $hdl->push_write ("getinfo\015\012"); |
38 | |
37 | |
39 | # read the response line |
38 | # read the response line |
40 | $handle->push_read (line => sub { |
39 | $hdl->push_read (line => sub { |
41 | my ($handle, $line) = @_; |
40 | my ($hdl, $line) = @_; |
42 | warn "read line <$line>\n"; |
41 | warn "got line <$line>\n"; |
43 | $cv->send; |
42 | $cv->send; |
44 | }); |
43 | }); |
45 | |
44 | |
46 | $cv->recv; |
45 | $cv->recv; |
47 | |
46 | |
… | |
… | |
49 | |
48 | |
50 | This module is a helper module to make it easier to do event-based I/O on |
49 | 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 |
50 | filehandles. For utility functions for doing non-blocking connects and accepts |
52 | on sockets see L<AnyEvent::Util>. |
51 | on sockets see L<AnyEvent::Util>. |
53 | |
52 | |
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53 | The L<AnyEvent::Intro> tutorial contains some well-documented |
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54 | AnyEvent::Handle examples. |
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55 | |
54 | In the following, when the documentation refers to of "bytes" then this |
56 | 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 |
57 | means characters. As sysread and syswrite are used for all I/O, their |
56 | treatment of characters applies to this module as well. |
58 | treatment of characters applies to this module as well. |
57 | |
59 | |
58 | All callbacks will be invoked with the handle object as their first |
60 | All callbacks will be invoked with the handle object as their first |
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… | |
60 | |
62 | |
61 | =head1 METHODS |
63 | =head1 METHODS |
62 | |
64 | |
63 | =over 4 |
65 | =over 4 |
64 | |
66 | |
65 | =item B<new (%args)> |
67 | =item $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value... |
66 | |
68 | |
67 | The constructor supports these arguments (all as key => value pairs). |
69 | The constructor supports these arguments (all as C<< key => value >> pairs). |
68 | |
70 | |
69 | =over 4 |
71 | =over 4 |
70 | |
72 | |
71 | =item fh => $filehandle [MANDATORY] |
73 | =item fh => $filehandle [MANDATORY] |
72 | |
74 | |
73 | The filehandle this L<AnyEvent::Handle> object will operate on. |
75 | The filehandle this L<AnyEvent::Handle> object will operate on. |
74 | |
76 | |
75 | NOTE: The filehandle will be set to non-blocking (using |
77 | NOTE: The filehandle will be set to non-blocking mode (using |
76 | AnyEvent::Util::fh_nonblocking). |
78 | C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in |
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79 | that mode. |
77 | |
80 | |
78 | =item on_eof => $cb->($handle) |
81 | =item on_eof => $cb->($handle) |
79 | |
82 | |
80 | Set the callback to be called when an end-of-file condition is detcted, |
83 | 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 |
84 | i.e. in the case of a socket, when the other side has closed the |
82 | connection cleanly. |
85 | connection cleanly. |
83 | |
86 | |
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87 | For sockets, this just means that the other side has stopped sending data, |
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88 | you can still try to write data, and, in fact, one can return from the EOF |
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89 | callback and continue writing data, as only the read part has been shut |
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90 | down. |
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91 | |
84 | While not mandatory, it is highly recommended to set an eof callback, |
92 | 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 |
93 | otherwise you might end up with a closed socket while you are still |
86 | waiting for data. |
94 | waiting for data. |
87 | |
95 | |
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96 | If an EOF condition has been detected but no C<on_eof> callback has been |
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97 | set, then a fatal error will be raised with C<$!> set to <0>. |
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98 | |
88 | =item on_error => $cb->($handle, $fatal) |
99 | =item on_error => $cb->($handle, $fatal, $message) |
89 | |
100 | |
90 | This is the error callback, which is called when, well, some error |
101 | This is the error callback, which is called when, well, some error |
91 | occured, such as not being able to resolve the hostname, failure to |
102 | occured, such as not being able to resolve the hostname, failure to |
92 | connect or a read error. |
103 | connect or a read error. |
93 | |
104 | |
94 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
105 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
95 | fatal errors the handle object will be shut down and will not be |
106 | fatal errors the handle object will be destroyed (by a call to C<< -> |
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107 | destroy >>) after invoking the error callback (which means you are free to |
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108 | examine the handle object). Examples of fatal errors are an EOF condition |
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109 | with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors. |
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110 | |
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111 | AnyEvent::Handle tries to find an appropriate error code for you to check |
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112 | against, but in some cases (TLS errors), this does not work well. It is |
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113 | recommended to always output the C<$message> argument in human-readable |
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114 | error messages (it's usually the same as C<"$!">). |
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115 | |
96 | usable. Non-fatal errors can be retried by simply returning, but it is |
116 | Non-fatal errors can be retried by simply returning, but it is recommended |
97 | recommended to simply ignore this parameter and instead abondon the handle |
117 | to simply ignore this parameter and instead abondon the handle object |
98 | object when this callback is invoked. |
118 | when this callback is invoked. Examples of non-fatal errors are timeouts |
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119 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
99 | |
120 | |
100 | On callback entrance, the value of C<$!> contains the operating system |
121 | On callback entrance, the value of C<$!> contains the operating system |
101 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
122 | error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or |
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123 | C<EPROTO>). |
102 | |
124 | |
103 | While not mandatory, it is I<highly> recommended to set this callback, as |
125 | While not mandatory, it is I<highly> recommended to set this callback, as |
104 | you will not be notified of errors otherwise. The default simply calls |
126 | you will not be notified of errors otherwise. The default simply calls |
105 | C<croak>. |
127 | C<croak>. |
106 | |
128 | |
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110 | and no read request is in the queue (unlike read queue callbacks, this |
132 | and no read request is in the queue (unlike read queue callbacks, this |
111 | callback will only be called when at least one octet of data is in the |
133 | callback will only be called when at least one octet of data is in the |
112 | read buffer). |
134 | read buffer). |
113 | |
135 | |
114 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
136 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
115 | method or access the C<$handle->{rbuf}> member directly. |
137 | method or access the C<< $handle->{rbuf} >> member directly. Note that you |
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138 | must not enlarge or modify the read buffer, you can only remove data at |
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139 | the beginning from it. |
116 | |
140 | |
117 | When an EOF condition is detected then AnyEvent::Handle will first try to |
141 | When an EOF condition is detected then AnyEvent::Handle will first try to |
118 | feed all the remaining data to the queued callbacks and C<on_read> before |
142 | feed all the remaining data to the queued callbacks and C<on_read> before |
119 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
143 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
120 | error will be raised (with C<$!> set to C<EPIPE>). |
144 | error will be raised (with C<$!> set to C<EPIPE>). |
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124 | This sets the callback that is called when the write buffer becomes empty |
148 | This sets the callback that is called when the write buffer becomes empty |
125 | (or when the callback is set and the buffer is empty already). |
149 | (or when the callback is set and the buffer is empty already). |
126 | |
150 | |
127 | To append to the write buffer, use the C<< ->push_write >> method. |
151 | To append to the write buffer, use the C<< ->push_write >> method. |
128 | |
152 | |
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153 | This callback is useful when you don't want to put all of your write data |
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154 | into the queue at once, for example, when you want to write the contents |
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155 | of some file to the socket you might not want to read the whole file into |
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156 | memory and push it into the queue, but instead only read more data from |
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157 | the file when the write queue becomes empty. |
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158 | |
129 | =item timeout => $fractional_seconds |
159 | =item timeout => $fractional_seconds |
130 | |
160 | |
131 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
161 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
132 | seconds pass without a successful read or write on the underlying file |
162 | seconds pass without a successful read or write on the underlying file |
133 | handle, the C<on_timeout> callback will be invoked (and if that one is |
163 | handle, the C<on_timeout> callback will be invoked (and if that one is |
134 | missing, an C<ETIMEDOUT> error will be raised). |
164 | missing, a non-fatal C<ETIMEDOUT> error will be raised). |
135 | |
165 | |
136 | Note that timeout processing is also active when you currently do not have |
166 | Note that timeout processing is also active when you currently do not have |
137 | any outstanding read or write requests: If you plan to keep the connection |
167 | any outstanding read or write requests: If you plan to keep the connection |
138 | idle then you should disable the timout temporarily or ignore the timeout |
168 | idle then you should disable the timout temporarily or ignore the timeout |
139 | in the C<on_timeout> callback. |
169 | in the C<on_timeout> callback, in which case AnyEvent::Handle will simply |
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170 | restart the timeout. |
140 | |
171 | |
141 | Zero (the default) disables this timeout. |
172 | Zero (the default) disables this timeout. |
142 | |
173 | |
143 | =item on_timeout => $cb->($handle) |
174 | =item on_timeout => $cb->($handle) |
144 | |
175 | |
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148 | |
179 | |
149 | =item rbuf_max => <bytes> |
180 | =item rbuf_max => <bytes> |
150 | |
181 | |
151 | If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>) |
182 | If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>) |
152 | when the read buffer ever (strictly) exceeds this size. This is useful to |
183 | when the read buffer ever (strictly) exceeds this size. This is useful to |
153 | avoid denial-of-service attacks. |
184 | avoid some forms of denial-of-service attacks. |
154 | |
185 | |
155 | For example, a server accepting connections from untrusted sources should |
186 | For example, a server accepting connections from untrusted sources should |
156 | be configured to accept only so-and-so much data that it cannot act on |
187 | be configured to accept only so-and-so much data that it cannot act on |
157 | (for example, when expecting a line, an attacker could send an unlimited |
188 | (for example, when expecting a line, an attacker could send an unlimited |
158 | amount of data without a callback ever being called as long as the line |
189 | amount of data without a callback ever being called as long as the line |
159 | isn't finished). |
190 | isn't finished). |
160 | |
191 | |
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192 | =item autocork => <boolean> |
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193 | |
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194 | When disabled (the default), then C<push_write> will try to immediately |
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195 | write the data to the handle, if possible. This avoids having to register |
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196 | a write watcher and wait for the next event loop iteration, but can |
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197 | be inefficient if you write multiple small chunks (on the wire, this |
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198 | disadvantage is usually avoided by your kernel's nagle algorithm, see |
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199 | C<no_delay>, but this option can save costly syscalls). |
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200 | |
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201 | When enabled, then writes will always be queued till the next event loop |
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202 | iteration. This is efficient when you do many small writes per iteration, |
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203 | but less efficient when you do a single write only per iteration (or when |
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204 | the write buffer often is full). It also increases write latency. |
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205 | |
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206 | =item no_delay => <boolean> |
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207 | |
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208 | When doing small writes on sockets, your operating system kernel might |
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209 | wait a bit for more data before actually sending it out. This is called |
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210 | the Nagle algorithm, and usually it is beneficial. |
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211 | |
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212 | In some situations you want as low a delay as possible, which can be |
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213 | accomplishd by setting this option to a true value. |
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214 | |
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215 | The default is your opertaing system's default behaviour (most likely |
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216 | enabled), this option explicitly enables or disables it, if possible. |
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217 | |
161 | =item read_size => <bytes> |
218 | =item read_size => <bytes> |
162 | |
219 | |
163 | The default read block size (the amount of bytes this module will try to read |
220 | The default read block size (the amount of bytes this module will |
164 | during each (loop iteration). Default: C<8192>. |
221 | try to read during each loop iteration, which affects memory |
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222 | requirements). Default: C<8192>. |
165 | |
223 | |
166 | =item low_water_mark => <bytes> |
224 | =item low_water_mark => <bytes> |
167 | |
225 | |
168 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
226 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
169 | buffer: If the write reaches this size or gets even samller it is |
227 | buffer: If the write reaches this size or gets even samller it is |
170 | considered empty. |
228 | considered empty. |
171 | |
229 | |
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230 | Sometimes it can be beneficial (for performance reasons) to add data to |
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231 | the write buffer before it is fully drained, but this is a rare case, as |
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232 | the operating system kernel usually buffers data as well, so the default |
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233 | is good in almost all cases. |
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234 | |
172 | =item linger => <seconds> |
235 | =item linger => <seconds> |
173 | |
236 | |
174 | If non-zero (default: C<3600>), then the destructor of the |
237 | If non-zero (default: C<3600>), then the destructor of the |
175 | AnyEvent::Handle object will check wether there is still outstanding write |
238 | AnyEvent::Handle object will check whether there is still outstanding |
176 | data and will install a watcher that will write out this data. No errors |
239 | write data and will install a watcher that will write this data to the |
177 | will be reported (this mostly matches how the operating system treats |
240 | socket. No errors will be reported (this mostly matches how the operating |
178 | outstanding data at socket close time). |
241 | system treats outstanding data at socket close time). |
179 | |
242 | |
180 | This will not work for partial TLS data that could not yet been |
243 | This will not work for partial TLS data that could not be encoded |
181 | encoded. This data will be lost. |
244 | yet. This data will be lost. Calling the C<stoptls> method in time might |
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245 | help. |
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246 | |
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247 | =item peername => $string |
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248 | |
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249 | A string used to identify the remote site - usually the DNS hostname |
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250 | (I<not> IDN!) used to create the connection, rarely the IP address. |
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251 | |
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252 | Apart from being useful in error messages, this string is also used in TLS |
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253 | peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This |
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254 | verification will be skipped when C<peername> is not specified or |
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255 | C<undef>. |
182 | |
256 | |
183 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
257 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
184 | |
258 | |
185 | When this parameter is given, it enables TLS (SSL) mode, that means it |
259 | When this parameter is given, it enables TLS (SSL) mode, that means |
186 | will start making tls handshake and will transparently encrypt/decrypt |
260 | AnyEvent will start a TLS handshake as soon as the conenction has been |
187 | data. |
261 | established and will transparently encrypt/decrypt data afterwards. |
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262 | |
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263 | All TLS protocol errors will be signalled as C<EPROTO>, with an |
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264 | appropriate error message. |
188 | |
265 | |
189 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
266 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
190 | automatically when you try to create a TLS handle). |
267 | automatically when you try to create a TLS handle): this module doesn't |
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268 | have a dependency on that module, so if your module requires it, you have |
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269 | to add the dependency yourself. |
191 | |
270 | |
192 | For the TLS server side, use C<accept>, and for the TLS client side of a |
271 | Unlike TCP, TLS has a server and client side: for the TLS server side, use |
193 | connection, use C<connect> mode. |
272 | C<accept>, and for the TLS client side of a connection, use C<connect> |
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273 | mode. |
194 | |
274 | |
195 | You can also provide your own TLS connection object, but you have |
275 | You can also provide your own TLS connection object, but you have |
196 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
276 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
197 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
277 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
198 | AnyEvent::Handle. |
278 | AnyEvent::Handle. Also, this module will take ownership of this connection |
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279 | object. |
199 | |
280 | |
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281 | At some future point, AnyEvent::Handle might switch to another TLS |
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282 | implementation, then the option to use your own session object will go |
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283 | away. |
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284 | |
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285 | B<IMPORTANT:> since Net::SSLeay "objects" are really only integers, |
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286 | passing in the wrong integer will lead to certain crash. This most often |
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287 | happens when one uses a stylish C<< tls => 1 >> and is surprised about the |
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288 | segmentation fault. |
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289 | |
200 | See the C<starttls> method if you need to start TLs negotiation later. |
290 | See the C<< ->starttls >> method for when need to start TLS negotiation later. |
201 | |
291 | |
202 | =item tls_ctx => $ssl_ctx |
292 | =item tls_ctx => $anyevent_tls |
203 | |
293 | |
204 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
294 | Use the given C<AnyEvent::TLS> object to create the new TLS connection |
205 | (unless a connection object was specified directly). If this parameter is |
295 | (unless a connection object was specified directly). If this parameter is |
206 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
296 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
207 | |
297 | |
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298 | Instead of an object, you can also specify a hash reference with C<< key |
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299 | => value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a |
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300 | new TLS context object. |
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301 | |
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302 | =item on_starttls => $cb->($handle, $success[, $error_message]) |
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303 | |
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304 | This callback will be invoked when the TLS/SSL handshake has finished. If |
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305 | C<$success> is true, then the TLS handshake succeeded, otherwise it failed |
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306 | (C<on_stoptls> will not be called in this case). |
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307 | |
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308 | The session in C<< $handle->{tls} >> can still be examined in this |
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309 | callback, even when the handshake was not successful. |
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310 | |
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311 | TLS handshake failures will not cause C<on_error> to be invoked when this |
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312 | callback is in effect, instead, the error message will be passed to C<on_starttls>. |
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313 | |
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314 | Without this callback, handshake failures lead to C<on_error> being |
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315 | called, as normal. |
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316 | |
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317 | Note that you cannot call C<starttls> right again in this callback. If you |
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318 | need to do that, start an zero-second timer instead whose callback can |
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319 | then call C<< ->starttls >> again. |
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320 | |
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321 | =item on_stoptls => $cb->($handle) |
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322 | |
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323 | When a SSLv3/TLS shutdown/close notify/EOF is detected and this callback is |
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324 | set, then it will be invoked after freeing the TLS session. If it is not, |
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325 | then a TLS shutdown condition will be treated like a normal EOF condition |
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326 | on the handle. |
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327 | |
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328 | The session in C<< $handle->{tls} >> can still be examined in this |
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329 | callback. |
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330 | |
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331 | This callback will only be called on TLS shutdowns, not when the |
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332 | underlying handle signals EOF. |
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333 | |
208 | =item json => JSON or JSON::XS object |
334 | =item json => JSON or JSON::XS object |
209 | |
335 | |
210 | This is the json coder object used by the C<json> read and write types. |
336 | This is the json coder object used by the C<json> read and write types. |
211 | |
337 | |
212 | If you don't supply it, then AnyEvent::Handle will create and use a |
338 | If you don't supply it, then AnyEvent::Handle will create and use a |
213 | suitable one, which will write and expect UTF-8 encoded JSON texts. |
339 | suitable one (on demand), which will write and expect UTF-8 encoded JSON |
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340 | texts. |
214 | |
341 | |
215 | Note that you are responsible to depend on the JSON module if you want to |
342 | Note that you are responsible to depend on the JSON module if you want to |
216 | use this functionality, as AnyEvent does not have a dependency itself. |
343 | use this functionality, as AnyEvent does not have a dependency itself. |
217 | |
344 | |
218 | =item filter_r => $cb |
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219 | |
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220 | =item filter_w => $cb |
|
|
221 | |
|
|
222 | These exist, but are undocumented at this time. |
|
|
223 | |
|
|
224 | =back |
345 | =back |
225 | |
346 | |
226 | =cut |
347 | =cut |
227 | |
348 | |
228 | sub new { |
349 | sub new { |
229 | my $class = shift; |
350 | my $class = shift; |
230 | |
|
|
231 | my $self = bless { @_ }, $class; |
351 | my $self = bless { @_ }, $class; |
232 | |
352 | |
233 | $self->{fh} or Carp::croak "mandatory argument fh is missing"; |
353 | $self->{fh} or Carp::croak "mandatory argument fh is missing"; |
234 | |
354 | |
235 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
355 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
236 | |
|
|
237 | if ($self->{tls}) { |
|
|
238 | require Net::SSLeay; |
|
|
239 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
|
|
240 | } |
|
|
241 | |
356 | |
242 | $self->{_activity} = AnyEvent->now; |
357 | $self->{_activity} = AnyEvent->now; |
243 | $self->_timeout; |
358 | $self->_timeout; |
244 | |
359 | |
|
|
360 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
|
|
361 | |
|
|
362 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}) |
|
|
363 | if $self->{tls}; |
|
|
364 | |
245 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
365 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
246 | |
366 | |
247 | $self |
367 | $self->start_read |
248 | } |
368 | if $self->{on_read}; |
249 | |
369 | |
|
|
370 | $self->{fh} && $self |
|
|
371 | } |
|
|
372 | |
250 | sub _shutdown { |
373 | #sub _shutdown { |
251 | my ($self) = @_; |
374 | # my ($self) = @_; |
252 | |
375 | # |
253 | delete $self->{_tw}; |
376 | # delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)}; |
254 | delete $self->{_rw}; |
377 | # $self->{_eof} = 1; # tell starttls et. al to stop trying |
255 | delete $self->{_ww}; |
378 | # |
256 | delete $self->{fh}; |
379 | # &_freetls; |
257 | |
380 | #} |
258 | $self->stoptls; |
|
|
259 | } |
|
|
260 | |
381 | |
261 | sub _error { |
382 | sub _error { |
262 | my ($self, $errno, $fatal) = @_; |
383 | my ($self, $errno, $fatal, $message) = @_; |
263 | |
|
|
264 | $self->_shutdown |
|
|
265 | if $fatal; |
|
|
266 | |
384 | |
267 | $! = $errno; |
385 | $! = $errno; |
|
|
386 | $message ||= "$!"; |
268 | |
387 | |
269 | if ($self->{on_error}) { |
388 | if ($self->{on_error}) { |
270 | $self->{on_error}($self, $fatal); |
389 | $self->{on_error}($self, $fatal, $message); |
271 | } else { |
390 | $self->destroy; |
|
|
391 | } elsif ($self->{fh}) { |
|
|
392 | $self->destroy; |
272 | Carp::croak "AnyEvent::Handle uncaught error: $!"; |
393 | Carp::croak "AnyEvent::Handle uncaught error: $message"; |
273 | } |
394 | } |
274 | } |
395 | } |
275 | |
396 | |
276 | =item $fh = $handle->fh |
397 | =item $fh = $handle->fh |
277 | |
398 | |
278 | This method returns the file handle of the L<AnyEvent::Handle> object. |
399 | This method returns the file handle used to create the L<AnyEvent::Handle> object. |
279 | |
400 | |
280 | =cut |
401 | =cut |
281 | |
402 | |
282 | sub fh { $_[0]{fh} } |
403 | sub fh { $_[0]{fh} } |
283 | |
404 | |
… | |
… | |
301 | $_[0]{on_eof} = $_[1]; |
422 | $_[0]{on_eof} = $_[1]; |
302 | } |
423 | } |
303 | |
424 | |
304 | =item $handle->on_timeout ($cb) |
425 | =item $handle->on_timeout ($cb) |
305 | |
426 | |
306 | Replace the current C<on_timeout> callback, or disables the callback |
427 | Replace the current C<on_timeout> callback, or disables the callback (but |
307 | (but not the timeout) if C<$cb> = C<undef>. See C<timeout> constructor |
428 | not the timeout) if C<$cb> = C<undef>. See the C<timeout> constructor |
308 | argument. |
429 | argument and method. |
309 | |
430 | |
310 | =cut |
431 | =cut |
311 | |
432 | |
312 | sub on_timeout { |
433 | sub on_timeout { |
313 | $_[0]{on_timeout} = $_[1]; |
434 | $_[0]{on_timeout} = $_[1]; |
|
|
435 | } |
|
|
436 | |
|
|
437 | =item $handle->autocork ($boolean) |
|
|
438 | |
|
|
439 | Enables or disables the current autocork behaviour (see C<autocork> |
|
|
440 | constructor argument). Changes will only take effect on the next write. |
|
|
441 | |
|
|
442 | =cut |
|
|
443 | |
|
|
444 | sub autocork { |
|
|
445 | $_[0]{autocork} = $_[1]; |
|
|
446 | } |
|
|
447 | |
|
|
448 | =item $handle->no_delay ($boolean) |
|
|
449 | |
|
|
450 | Enables or disables the C<no_delay> setting (see constructor argument of |
|
|
451 | the same name for details). |
|
|
452 | |
|
|
453 | =cut |
|
|
454 | |
|
|
455 | sub no_delay { |
|
|
456 | $_[0]{no_delay} = $_[1]; |
|
|
457 | |
|
|
458 | eval { |
|
|
459 | local $SIG{__DIE__}; |
|
|
460 | setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]; |
|
|
461 | }; |
|
|
462 | } |
|
|
463 | |
|
|
464 | =item $handle->on_starttls ($cb) |
|
|
465 | |
|
|
466 | Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument). |
|
|
467 | |
|
|
468 | =cut |
|
|
469 | |
|
|
470 | sub on_starttls { |
|
|
471 | $_[0]{on_starttls} = $_[1]; |
|
|
472 | } |
|
|
473 | |
|
|
474 | =item $handle->on_stoptls ($cb) |
|
|
475 | |
|
|
476 | Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument). |
|
|
477 | |
|
|
478 | =cut |
|
|
479 | |
|
|
480 | sub on_starttls { |
|
|
481 | $_[0]{on_stoptls} = $_[1]; |
314 | } |
482 | } |
315 | |
483 | |
316 | ############################################################################# |
484 | ############################################################################# |
317 | |
485 | |
318 | =item $handle->timeout ($seconds) |
486 | =item $handle->timeout ($seconds) |
… | |
… | |
396 | my ($self, $cb) = @_; |
564 | my ($self, $cb) = @_; |
397 | |
565 | |
398 | $self->{on_drain} = $cb; |
566 | $self->{on_drain} = $cb; |
399 | |
567 | |
400 | $cb->($self) |
568 | $cb->($self) |
401 | if $cb && $self->{low_water_mark} >= length $self->{wbuf}; |
569 | if $cb && $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}); |
402 | } |
570 | } |
403 | |
571 | |
404 | =item $handle->push_write ($data) |
572 | =item $handle->push_write ($data) |
405 | |
573 | |
406 | Queues the given scalar to be written. You can push as much data as you |
574 | Queues the given scalar to be written. You can push as much data as you |
… | |
… | |
417 | Scalar::Util::weaken $self; |
585 | Scalar::Util::weaken $self; |
418 | |
586 | |
419 | my $cb = sub { |
587 | my $cb = sub { |
420 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
588 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
421 | |
589 | |
422 | if ($len >= 0) { |
590 | if (defined $len) { |
423 | substr $self->{wbuf}, 0, $len, ""; |
591 | substr $self->{wbuf}, 0, $len, ""; |
424 | |
592 | |
425 | $self->{_activity} = AnyEvent->now; |
593 | $self->{_activity} = AnyEvent->now; |
426 | |
594 | |
427 | $self->{on_drain}($self) |
595 | $self->{on_drain}($self) |
428 | if $self->{low_water_mark} >= length $self->{wbuf} |
596 | if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}) |
429 | && $self->{on_drain}; |
597 | && $self->{on_drain}; |
430 | |
598 | |
431 | delete $self->{_ww} unless length $self->{wbuf}; |
599 | delete $self->{_ww} unless length $self->{wbuf}; |
432 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
600 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
433 | $self->_error ($!, 1); |
601 | $self->_error ($!, 1); |
434 | } |
602 | } |
435 | }; |
603 | }; |
436 | |
604 | |
437 | # try to write data immediately |
605 | # try to write data immediately |
438 | $cb->(); |
606 | $cb->() unless $self->{autocork}; |
439 | |
607 | |
440 | # if still data left in wbuf, we need to poll |
608 | # if still data left in wbuf, we need to poll |
441 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
609 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
442 | if length $self->{wbuf}; |
610 | if length $self->{wbuf}; |
443 | }; |
611 | }; |
… | |
… | |
457 | |
625 | |
458 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
626 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
459 | ->($self, @_); |
627 | ->($self, @_); |
460 | } |
628 | } |
461 | |
629 | |
462 | if ($self->{filter_w}) { |
630 | if ($self->{tls}) { |
463 | $self->{filter_w}($self, \$_[0]); |
631 | $self->{_tls_wbuf} .= $_[0]; |
|
|
632 | |
|
|
633 | &_dotls ($self); |
464 | } else { |
634 | } else { |
465 | $self->{wbuf} .= $_[0]; |
635 | $self->{wbuf} .= $_[0]; |
466 | $self->_drain_wbuf; |
636 | $self->_drain_wbuf; |
467 | } |
637 | } |
468 | } |
638 | } |
… | |
… | |
485 | =cut |
655 | =cut |
486 | |
656 | |
487 | register_write_type netstring => sub { |
657 | register_write_type netstring => sub { |
488 | my ($self, $string) = @_; |
658 | my ($self, $string) = @_; |
489 | |
659 | |
490 | sprintf "%d:%s,", (length $string), $string |
660 | (length $string) . ":$string," |
491 | }; |
661 | }; |
492 | |
662 | |
493 | =item packstring => $format, $data |
663 | =item packstring => $format, $data |
494 | |
664 | |
495 | An octet string prefixed with an encoded length. The encoding C<$format> |
665 | An octet string prefixed with an encoded length. The encoding C<$format> |
… | |
… | |
500 | =cut |
670 | =cut |
501 | |
671 | |
502 | register_write_type packstring => sub { |
672 | register_write_type packstring => sub { |
503 | my ($self, $format, $string) = @_; |
673 | my ($self, $format, $string) = @_; |
504 | |
674 | |
505 | pack "$format/a", $string |
675 | pack "$format/a*", $string |
506 | }; |
676 | }; |
507 | |
677 | |
508 | =item json => $array_or_hashref |
678 | =item json => $array_or_hashref |
509 | |
679 | |
510 | Encodes the given hash or array reference into a JSON object. Unless you |
680 | Encodes the given hash or array reference into a JSON object. Unless you |
… | |
… | |
556 | register_write_type storable => sub { |
726 | register_write_type storable => sub { |
557 | my ($self, $ref) = @_; |
727 | my ($self, $ref) = @_; |
558 | |
728 | |
559 | require Storable; |
729 | require Storable; |
560 | |
730 | |
561 | pack "w/a", Storable::nfreeze ($ref) |
731 | pack "w/a*", Storable::nfreeze ($ref) |
562 | }; |
732 | }; |
563 | |
733 | |
564 | =back |
734 | =back |
|
|
735 | |
|
|
736 | =item $handle->push_shutdown |
|
|
737 | |
|
|
738 | Sometimes you know you want to close the socket after writing your data |
|
|
739 | before it was actually written. One way to do that is to replace your |
|
|
740 | C<on_drain> handler by a callback that shuts down the socket (and set |
|
|
741 | C<low_water_mark> to C<0>). This method is a shorthand for just that, and |
|
|
742 | replaces the C<on_drain> callback with: |
|
|
743 | |
|
|
744 | sub { shutdown $_[0]{fh}, 1 } # for push_shutdown |
|
|
745 | |
|
|
746 | This simply shuts down the write side and signals an EOF condition to the |
|
|
747 | the peer. |
|
|
748 | |
|
|
749 | You can rely on the normal read queue and C<on_eof> handling |
|
|
750 | afterwards. This is the cleanest way to close a connection. |
|
|
751 | |
|
|
752 | =cut |
|
|
753 | |
|
|
754 | sub push_shutdown { |
|
|
755 | my ($self) = @_; |
|
|
756 | |
|
|
757 | delete $self->{low_water_mark}; |
|
|
758 | $self->on_drain (sub { shutdown $_[0]{fh}, 1 }); |
|
|
759 | } |
565 | |
760 | |
566 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
761 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
567 | |
762 | |
568 | This function (not method) lets you add your own types to C<push_write>. |
763 | This function (not method) lets you add your own types to C<push_write>. |
569 | Whenever the given C<type> is used, C<push_write> will invoke the code |
764 | Whenever the given C<type> is used, C<push_write> will invoke the code |
… | |
… | |
590 | ways, the "simple" way, using only C<on_read> and the "complex" way, using |
785 | ways, the "simple" way, using only C<on_read> and the "complex" way, using |
591 | a queue. |
786 | a queue. |
592 | |
787 | |
593 | In the simple case, you just install an C<on_read> callback and whenever |
788 | In the simple case, you just install an C<on_read> callback and whenever |
594 | new data arrives, it will be called. You can then remove some data (if |
789 | new data arrives, it will be called. You can then remove some data (if |
595 | enough is there) from the read buffer (C<< $handle->rbuf >>) if you want |
790 | enough is there) from the read buffer (C<< $handle->rbuf >>). Or you cna |
596 | or not. |
791 | leave the data there if you want to accumulate more (e.g. when only a |
|
|
792 | partial message has been received so far). |
597 | |
793 | |
598 | In the more complex case, you want to queue multiple callbacks. In this |
794 | In the more complex case, you want to queue multiple callbacks. In this |
599 | case, AnyEvent::Handle will call the first queued callback each time new |
795 | case, AnyEvent::Handle will call the first queued callback each time new |
600 | data arrives (also the first time it is queued) and removes it when it has |
796 | data arrives (also the first time it is queued) and removes it when it has |
601 | done its job (see C<push_read>, below). |
797 | done its job (see C<push_read>, below). |
… | |
… | |
619 | # handle xml |
815 | # handle xml |
620 | }); |
816 | }); |
621 | }); |
817 | }); |
622 | }); |
818 | }); |
623 | |
819 | |
624 | Example 2: Implement a client for a protocol that replies either with |
820 | Example 2: Implement a client for a protocol that replies either with "OK" |
625 | "OK" and another line or "ERROR" for one request, and 64 bytes for the |
821 | and another line or "ERROR" for the first request that is sent, and 64 |
626 | second request. Due tot he availability of a full queue, we can just |
822 | bytes for the second request. Due to the availability of a queue, we can |
627 | pipeline sending both requests and manipulate the queue as necessary in |
823 | just pipeline sending both requests and manipulate the queue as necessary |
628 | the callbacks: |
824 | in the callbacks. |
629 | |
825 | |
630 | # request one |
826 | When the first callback is called and sees an "OK" response, it will |
|
|
827 | C<unshift> another line-read. This line-read will be queued I<before> the |
|
|
828 | 64-byte chunk callback. |
|
|
829 | |
|
|
830 | # request one, returns either "OK + extra line" or "ERROR" |
631 | $handle->push_write ("request 1\015\012"); |
831 | $handle->push_write ("request 1\015\012"); |
632 | |
832 | |
633 | # we expect "ERROR" or "OK" as response, so push a line read |
833 | # we expect "ERROR" or "OK" as response, so push a line read |
634 | $handle->push_read (line => sub { |
834 | $handle->push_read (line => sub { |
635 | # if we got an "OK", we have to _prepend_ another line, |
835 | # if we got an "OK", we have to _prepend_ another line, |
… | |
… | |
642 | ... |
842 | ... |
643 | }); |
843 | }); |
644 | } |
844 | } |
645 | }); |
845 | }); |
646 | |
846 | |
647 | # request two |
847 | # request two, simply returns 64 octets |
648 | $handle->push_write ("request 2\015\012"); |
848 | $handle->push_write ("request 2\015\012"); |
649 | |
849 | |
650 | # simply read 64 bytes, always |
850 | # simply read 64 bytes, always |
651 | $handle->push_read (chunk => 64, sub { |
851 | $handle->push_read (chunk => 64, sub { |
652 | my $response = $_[1]; |
852 | my $response = $_[1]; |
… | |
… | |
664 | |
864 | |
665 | if ( |
865 | if ( |
666 | defined $self->{rbuf_max} |
866 | defined $self->{rbuf_max} |
667 | && $self->{rbuf_max} < length $self->{rbuf} |
867 | && $self->{rbuf_max} < length $self->{rbuf} |
668 | ) { |
868 | ) { |
669 | return $self->_error (&Errno::ENOSPC, 1); |
869 | $self->_error (&Errno::ENOSPC, 1), return; |
670 | } |
870 | } |
671 | |
871 | |
672 | while () { |
872 | while () { |
673 | no strict 'refs'; |
873 | # we need to use a separate tls read buffer, as we must not receive data while |
|
|
874 | # we are draining the buffer, and this can only happen with TLS. |
|
|
875 | $self->{rbuf} .= delete $self->{_tls_rbuf} if exists $self->{_tls_rbuf}; |
674 | |
876 | |
675 | my $len = length $self->{rbuf}; |
877 | my $len = length $self->{rbuf}; |
676 | |
878 | |
677 | if (my $cb = shift @{ $self->{_queue} }) { |
879 | if (my $cb = shift @{ $self->{_queue} }) { |
678 | unless ($cb->($self)) { |
880 | unless ($cb->($self)) { |
679 | if ($self->{_eof}) { |
881 | if ($self->{_eof}) { |
680 | # no progress can be made (not enough data and no data forthcoming) |
882 | # no progress can be made (not enough data and no data forthcoming) |
681 | $self->_error (&Errno::EPIPE, 1), last; |
883 | $self->_error (&Errno::EPIPE, 1), return; |
682 | } |
884 | } |
683 | |
885 | |
684 | unshift @{ $self->{_queue} }, $cb; |
886 | unshift @{ $self->{_queue} }, $cb; |
685 | last; |
887 | last; |
686 | } |
888 | } |
… | |
… | |
694 | && !@{ $self->{_queue} } # and the queue is still empty |
896 | && !@{ $self->{_queue} } # and the queue is still empty |
695 | && $self->{on_read} # but we still have on_read |
897 | && $self->{on_read} # but we still have on_read |
696 | ) { |
898 | ) { |
697 | # no further data will arrive |
899 | # no further data will arrive |
698 | # so no progress can be made |
900 | # so no progress can be made |
699 | $self->_error (&Errno::EPIPE, 1), last |
901 | $self->_error (&Errno::EPIPE, 1), return |
700 | if $self->{_eof}; |
902 | if $self->{_eof}; |
701 | |
903 | |
702 | last; # more data might arrive |
904 | last; # more data might arrive |
703 | } |
905 | } |
704 | } else { |
906 | } else { |
705 | # read side becomes idle |
907 | # read side becomes idle |
706 | delete $self->{_rw}; |
908 | delete $self->{_rw} unless $self->{tls}; |
707 | last; |
909 | last; |
708 | } |
910 | } |
709 | } |
911 | } |
710 | |
912 | |
|
|
913 | if ($self->{_eof}) { |
|
|
914 | if ($self->{on_eof}) { |
711 | $self->{on_eof}($self) |
915 | $self->{on_eof}($self) |
712 | if $self->{_eof} && $self->{on_eof}; |
916 | } else { |
|
|
917 | $self->_error (0, 1, "Unexpected end-of-file"); |
|
|
918 | } |
|
|
919 | } |
713 | |
920 | |
714 | # may need to restart read watcher |
921 | # may need to restart read watcher |
715 | unless ($self->{_rw}) { |
922 | unless ($self->{_rw}) { |
716 | $self->start_read |
923 | $self->start_read |
717 | if $self->{on_read} || @{ $self->{_queue} }; |
924 | if $self->{on_read} || @{ $self->{_queue} }; |
… | |
… | |
735 | |
942 | |
736 | =item $handle->rbuf |
943 | =item $handle->rbuf |
737 | |
944 | |
738 | Returns the read buffer (as a modifiable lvalue). |
945 | Returns the read buffer (as a modifiable lvalue). |
739 | |
946 | |
740 | You can access the read buffer directly as the C<< ->{rbuf} >> member, if |
947 | You can access the read buffer directly as the C<< ->{rbuf} >> |
741 | you want. |
948 | member, if you want. However, the only operation allowed on the |
|
|
949 | read buffer (apart from looking at it) is removing data from its |
|
|
950 | beginning. Otherwise modifying or appending to it is not allowed and will |
|
|
951 | lead to hard-to-track-down bugs. |
742 | |
952 | |
743 | NOTE: The read buffer should only be used or modified if the C<on_read>, |
953 | NOTE: The read buffer should only be used or modified if the C<on_read>, |
744 | C<push_read> or C<unshift_read> methods are used. The other read methods |
954 | C<push_read> or C<unshift_read> methods are used. The other read methods |
745 | automatically manage the read buffer. |
955 | automatically manage the read buffer. |
746 | |
956 | |
… | |
… | |
843 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
1053 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
844 | 1 |
1054 | 1 |
845 | } |
1055 | } |
846 | }; |
1056 | }; |
847 | |
1057 | |
848 | # compatibility with older API |
|
|
849 | sub push_read_chunk { |
|
|
850 | $_[0]->push_read (chunk => $_[1], $_[2]); |
|
|
851 | } |
|
|
852 | |
|
|
853 | sub unshift_read_chunk { |
|
|
854 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
|
|
855 | } |
|
|
856 | |
|
|
857 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
1058 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
858 | |
1059 | |
859 | The callback will be called only once a full line (including the end of |
1060 | The callback will be called only once a full line (including the end of |
860 | line marker, C<$eol>) has been read. This line (excluding the end of line |
1061 | line marker, C<$eol>) has been read. This line (excluding the end of line |
861 | marker) will be passed to the callback as second argument (C<$line>), and |
1062 | marker) will be passed to the callback as second argument (C<$line>), and |
… | |
… | |
876 | =cut |
1077 | =cut |
877 | |
1078 | |
878 | register_read_type line => sub { |
1079 | register_read_type line => sub { |
879 | my ($self, $cb, $eol) = @_; |
1080 | my ($self, $cb, $eol) = @_; |
880 | |
1081 | |
881 | $eol = qr|(\015?\012)| if @_ < 3; |
1082 | if (@_ < 3) { |
|
|
1083 | # this is more than twice as fast as the generic code below |
|
|
1084 | sub { |
|
|
1085 | $_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return; |
|
|
1086 | |
|
|
1087 | $cb->($_[0], $1, $2); |
|
|
1088 | 1 |
|
|
1089 | } |
|
|
1090 | } else { |
882 | $eol = quotemeta $eol unless ref $eol; |
1091 | $eol = quotemeta $eol unless ref $eol; |
883 | $eol = qr|^(.*?)($eol)|s; |
1092 | $eol = qr|^(.*?)($eol)|s; |
884 | |
1093 | |
885 | sub { |
1094 | sub { |
886 | $_[0]{rbuf} =~ s/$eol// or return; |
1095 | $_[0]{rbuf} =~ s/$eol// or return; |
887 | |
1096 | |
888 | $cb->($_[0], $1, $2); |
1097 | $cb->($_[0], $1, $2); |
|
|
1098 | 1 |
889 | 1 |
1099 | } |
890 | } |
1100 | } |
891 | }; |
1101 | }; |
892 | |
|
|
893 | # compatibility with older API |
|
|
894 | sub push_read_line { |
|
|
895 | my $self = shift; |
|
|
896 | $self->push_read (line => @_); |
|
|
897 | } |
|
|
898 | |
|
|
899 | sub unshift_read_line { |
|
|
900 | my $self = shift; |
|
|
901 | $self->unshift_read (line => @_); |
|
|
902 | } |
|
|
903 | |
1102 | |
904 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
1103 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
905 | |
1104 | |
906 | Makes a regex match against the regex object C<$accept> and returns |
1105 | Makes a regex match against the regex object C<$accept> and returns |
907 | everything up to and including the match. |
1106 | everything up to and including the match. |
… | |
… | |
1012 | An octet string prefixed with an encoded length. The encoding C<$format> |
1211 | An octet string prefixed with an encoded length. The encoding C<$format> |
1013 | uses the same format as a Perl C<pack> format, but must specify a single |
1212 | uses the same format as a Perl C<pack> format, but must specify a single |
1014 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
1213 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
1015 | optional C<!>, C<< < >> or C<< > >> modifier). |
1214 | optional C<!>, C<< < >> or C<< > >> modifier). |
1016 | |
1215 | |
1017 | DNS over TCP uses a prefix of C<n>, EPP uses a prefix of C<N>. |
1216 | For example, DNS over TCP uses a prefix of C<n> (2 octet network order), |
|
|
1217 | EPP uses a prefix of C<N> (4 octtes). |
1018 | |
1218 | |
1019 | Example: read a block of data prefixed by its length in BER-encoded |
1219 | Example: read a block of data prefixed by its length in BER-encoded |
1020 | format (very efficient). |
1220 | format (very efficient). |
1021 | |
1221 | |
1022 | $handle->push_read (packstring => "w", sub { |
1222 | $handle->push_read (packstring => "w", sub { |
… | |
… | |
1028 | register_read_type packstring => sub { |
1228 | register_read_type packstring => sub { |
1029 | my ($self, $cb, $format) = @_; |
1229 | my ($self, $cb, $format) = @_; |
1030 | |
1230 | |
1031 | sub { |
1231 | sub { |
1032 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1232 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1033 | defined (my $len = eval { unpack $format, $_[0]->{rbuf} }) |
1233 | defined (my $len = eval { unpack $format, $_[0]{rbuf} }) |
1034 | or return; |
1234 | or return; |
1035 | |
1235 | |
|
|
1236 | $format = length pack $format, $len; |
|
|
1237 | |
|
|
1238 | # bypass unshift if we already have the remaining chunk |
|
|
1239 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1240 | my $data = substr $_[0]{rbuf}, $format, $len; |
|
|
1241 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1242 | $cb->($_[0], $data); |
|
|
1243 | } else { |
1036 | # remove prefix |
1244 | # remove prefix |
1037 | substr $_[0]->{rbuf}, 0, (length pack $format, $len), ""; |
1245 | substr $_[0]{rbuf}, 0, $format, ""; |
1038 | |
1246 | |
1039 | # read rest |
1247 | # read remaining chunk |
1040 | $_[0]->unshift_read (chunk => $len, $cb); |
1248 | $_[0]->unshift_read (chunk => $len, $cb); |
|
|
1249 | } |
1041 | |
1250 | |
1042 | 1 |
1251 | 1 |
1043 | } |
1252 | } |
1044 | }; |
1253 | }; |
1045 | |
1254 | |
1046 | =item json => $cb->($handle, $hash_or_arrayref) |
1255 | =item json => $cb->($handle, $hash_or_arrayref) |
1047 | |
1256 | |
1048 | Reads a JSON object or array, decodes it and passes it to the callback. |
1257 | Reads a JSON object or array, decodes it and passes it to the |
|
|
1258 | callback. When a parse error occurs, an C<EBADMSG> error will be raised. |
1049 | |
1259 | |
1050 | If a C<json> object was passed to the constructor, then that will be used |
1260 | If a C<json> object was passed to the constructor, then that will be used |
1051 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
1261 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
1052 | |
1262 | |
1053 | This read type uses the incremental parser available with JSON version |
1263 | This read type uses the incremental parser available with JSON version |
… | |
… | |
1062 | =cut |
1272 | =cut |
1063 | |
1273 | |
1064 | register_read_type json => sub { |
1274 | register_read_type json => sub { |
1065 | my ($self, $cb) = @_; |
1275 | my ($self, $cb) = @_; |
1066 | |
1276 | |
1067 | require JSON; |
1277 | my $json = $self->{json} ||= |
|
|
1278 | eval { require JSON::XS; JSON::XS->new->utf8 } |
|
|
1279 | || do { require JSON; JSON->new->utf8 }; |
1068 | |
1280 | |
1069 | my $data; |
1281 | my $data; |
1070 | my $rbuf = \$self->{rbuf}; |
1282 | my $rbuf = \$self->{rbuf}; |
1071 | |
1283 | |
1072 | my $json = $self->{json} ||= JSON->new->utf8; |
|
|
1073 | |
|
|
1074 | sub { |
1284 | sub { |
1075 | my $ref = $json->incr_parse ($self->{rbuf}); |
1285 | my $ref = eval { $json->incr_parse ($self->{rbuf}) }; |
1076 | |
1286 | |
1077 | if ($ref) { |
1287 | if ($ref) { |
1078 | $self->{rbuf} = $json->incr_text; |
1288 | $self->{rbuf} = $json->incr_text; |
1079 | $json->incr_text = ""; |
1289 | $json->incr_text = ""; |
1080 | $cb->($self, $ref); |
1290 | $cb->($self, $ref); |
1081 | |
1291 | |
1082 | 1 |
1292 | 1 |
|
|
1293 | } elsif ($@) { |
|
|
1294 | # error case |
|
|
1295 | $json->incr_skip; |
|
|
1296 | |
|
|
1297 | $self->{rbuf} = $json->incr_text; |
|
|
1298 | $json->incr_text = ""; |
|
|
1299 | |
|
|
1300 | $self->_error (&Errno::EBADMSG); |
|
|
1301 | |
|
|
1302 | () |
1083 | } else { |
1303 | } else { |
1084 | $self->{rbuf} = ""; |
1304 | $self->{rbuf} = ""; |
|
|
1305 | |
1085 | () |
1306 | () |
1086 | } |
1307 | } |
1087 | } |
1308 | } |
1088 | }; |
1309 | }; |
1089 | |
1310 | |
… | |
… | |
1102 | |
1323 | |
1103 | require Storable; |
1324 | require Storable; |
1104 | |
1325 | |
1105 | sub { |
1326 | sub { |
1106 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1327 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1107 | defined (my $len = eval { unpack "w", $_[0]->{rbuf} }) |
1328 | defined (my $len = eval { unpack "w", $_[0]{rbuf} }) |
1108 | or return; |
1329 | or return; |
1109 | |
1330 | |
|
|
1331 | my $format = length pack "w", $len; |
|
|
1332 | |
|
|
1333 | # bypass unshift if we already have the remaining chunk |
|
|
1334 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1335 | my $data = substr $_[0]{rbuf}, $format, $len; |
|
|
1336 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1337 | $cb->($_[0], Storable::thaw ($data)); |
|
|
1338 | } else { |
1110 | # remove prefix |
1339 | # remove prefix |
1111 | substr $_[0]->{rbuf}, 0, (length pack "w", $len), ""; |
1340 | substr $_[0]{rbuf}, 0, $format, ""; |
1112 | |
1341 | |
1113 | # read rest |
1342 | # read remaining chunk |
1114 | $_[0]->unshift_read (chunk => $len, sub { |
1343 | $_[0]->unshift_read (chunk => $len, sub { |
1115 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1344 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1116 | $cb->($_[0], $ref); |
1345 | $cb->($_[0], $ref); |
1117 | } else { |
1346 | } else { |
1118 | $self->_error (&Errno::EBADMSG); |
1347 | $self->_error (&Errno::EBADMSG); |
|
|
1348 | } |
1119 | } |
1349 | }); |
1120 | }); |
1350 | } |
|
|
1351 | |
|
|
1352 | 1 |
1121 | } |
1353 | } |
1122 | }; |
1354 | }; |
1123 | |
1355 | |
1124 | =back |
1356 | =back |
1125 | |
1357 | |
… | |
… | |
1155 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
1387 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
1156 | you change the C<on_read> callback or push/unshift a read callback, and it |
1388 | you change the C<on_read> callback or push/unshift a read callback, and it |
1157 | will automatically C<stop_read> for you when neither C<on_read> is set nor |
1389 | will automatically C<stop_read> for you when neither C<on_read> is set nor |
1158 | there are any read requests in the queue. |
1390 | there are any read requests in the queue. |
1159 | |
1391 | |
|
|
1392 | These methods will have no effect when in TLS mode (as TLS doesn't support |
|
|
1393 | half-duplex connections). |
|
|
1394 | |
1160 | =cut |
1395 | =cut |
1161 | |
1396 | |
1162 | sub stop_read { |
1397 | sub stop_read { |
1163 | my ($self) = @_; |
1398 | my ($self) = @_; |
1164 | |
1399 | |
1165 | delete $self->{_rw}; |
1400 | delete $self->{_rw} unless $self->{tls}; |
1166 | } |
1401 | } |
1167 | |
1402 | |
1168 | sub start_read { |
1403 | sub start_read { |
1169 | my ($self) = @_; |
1404 | my ($self) = @_; |
1170 | |
1405 | |
1171 | unless ($self->{_rw} || $self->{_eof}) { |
1406 | unless ($self->{_rw} || $self->{_eof}) { |
1172 | Scalar::Util::weaken $self; |
1407 | Scalar::Util::weaken $self; |
1173 | |
1408 | |
1174 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
1409 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
1175 | my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; |
1410 | my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf}); |
1176 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
1411 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
1177 | |
1412 | |
1178 | if ($len > 0) { |
1413 | if ($len > 0) { |
1179 | $self->{_activity} = AnyEvent->now; |
1414 | $self->{_activity} = AnyEvent->now; |
1180 | |
1415 | |
1181 | $self->{filter_r} |
1416 | if ($self->{tls}) { |
1182 | ? $self->{filter_r}($self, $rbuf) |
1417 | Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf); |
1183 | : $self->{_in_drain} || $self->_drain_rbuf; |
1418 | |
|
|
1419 | &_dotls ($self); |
|
|
1420 | } else { |
|
|
1421 | $self->_drain_rbuf unless $self->{_in_drain}; |
|
|
1422 | } |
1184 | |
1423 | |
1185 | } elsif (defined $len) { |
1424 | } elsif (defined $len) { |
1186 | delete $self->{_rw}; |
1425 | delete $self->{_rw}; |
1187 | $self->{_eof} = 1; |
1426 | $self->{_eof} = 1; |
1188 | $self->_drain_rbuf unless $self->{_in_drain}; |
1427 | $self->_drain_rbuf unless $self->{_in_drain}; |
… | |
… | |
1192 | } |
1431 | } |
1193 | }); |
1432 | }); |
1194 | } |
1433 | } |
1195 | } |
1434 | } |
1196 | |
1435 | |
|
|
1436 | our $ERROR_SYSCALL; |
|
|
1437 | our $ERROR_WANT_READ; |
|
|
1438 | |
|
|
1439 | sub _tls_error { |
|
|
1440 | my ($self, $err) = @_; |
|
|
1441 | |
|
|
1442 | return $self->_error ($!, 1) |
|
|
1443 | if $err == Net::SSLeay::ERROR_SYSCALL (); |
|
|
1444 | |
|
|
1445 | my $err =Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ()); |
|
|
1446 | |
|
|
1447 | # reduce error string to look less scary |
|
|
1448 | $err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /; |
|
|
1449 | |
|
|
1450 | if ($self->{_on_starttls}) { |
|
|
1451 | (delete $self->{_on_starttls})->($self, undef, $err); |
|
|
1452 | &_freetls; |
|
|
1453 | } else { |
|
|
1454 | &_freetls; |
|
|
1455 | $self->_error (&Errno::EPROTO, 1, $err); |
|
|
1456 | } |
|
|
1457 | } |
|
|
1458 | |
|
|
1459 | # poll the write BIO and send the data if applicable |
|
|
1460 | # also decode read data if possible |
|
|
1461 | # this is basiclaly our TLS state machine |
|
|
1462 | # more efficient implementations are possible with openssl, |
|
|
1463 | # but not with the buggy and incomplete Net::SSLeay. |
1197 | sub _dotls { |
1464 | sub _dotls { |
1198 | my ($self) = @_; |
1465 | my ($self) = @_; |
1199 | |
1466 | |
1200 | my $buf; |
1467 | my $tmp; |
1201 | |
1468 | |
1202 | if (length $self->{_tls_wbuf}) { |
1469 | if (length $self->{_tls_wbuf}) { |
1203 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1470 | while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1204 | substr $self->{_tls_wbuf}, 0, $len, ""; |
1471 | substr $self->{_tls_wbuf}, 0, $tmp, ""; |
1205 | } |
1472 | } |
1206 | } |
|
|
1207 | |
1473 | |
|
|
1474 | $tmp = Net::SSLeay::get_error ($self->{tls}, $tmp); |
|
|
1475 | return $self->_tls_error ($tmp) |
|
|
1476 | if $tmp != $ERROR_WANT_READ |
|
|
1477 | && ($tmp != $ERROR_SYSCALL || $!); |
|
|
1478 | } |
|
|
1479 | |
|
|
1480 | while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) { |
|
|
1481 | unless (length $tmp) { |
|
|
1482 | $self->{_on_starttls} |
|
|
1483 | and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ??? |
|
|
1484 | &_freetls; |
|
|
1485 | |
|
|
1486 | if ($self->{on_stoptls}) { |
|
|
1487 | $self->{on_stoptls}($self); |
|
|
1488 | return; |
|
|
1489 | } else { |
|
|
1490 | # let's treat SSL-eof as we treat normal EOF |
|
|
1491 | delete $self->{_rw}; |
|
|
1492 | $self->{_eof} = 1; |
|
|
1493 | } |
|
|
1494 | } |
|
|
1495 | |
|
|
1496 | $self->{_tls_rbuf} .= $tmp; |
|
|
1497 | $self->_drain_rbuf unless $self->{_in_drain}; |
|
|
1498 | $self->{tls} or return; # tls session might have gone away in callback |
|
|
1499 | } |
|
|
1500 | |
|
|
1501 | $tmp = Net::SSLeay::get_error ($self->{tls}, -1); |
|
|
1502 | return $self->_tls_error ($tmp) |
|
|
1503 | if $tmp != $ERROR_WANT_READ |
|
|
1504 | && ($tmp != $ERROR_SYSCALL || $!); |
|
|
1505 | |
1208 | if (length ($buf = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1506 | while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1209 | $self->{wbuf} .= $buf; |
1507 | $self->{wbuf} .= $tmp; |
1210 | $self->_drain_wbuf; |
1508 | $self->_drain_wbuf; |
1211 | } |
1509 | } |
1212 | |
1510 | |
1213 | while (defined ($buf = Net::SSLeay::read ($self->{tls}))) { |
1511 | $self->{_on_starttls} |
1214 | if (length $buf) { |
1512 | and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK () |
1215 | $self->{rbuf} .= $buf; |
1513 | and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established"); |
1216 | $self->_drain_rbuf unless $self->{_in_drain}; |
|
|
1217 | } else { |
|
|
1218 | # let's treat SSL-eof as we treat normal EOF |
|
|
1219 | $self->{_eof} = 1; |
|
|
1220 | $self->_shutdown; |
|
|
1221 | return; |
|
|
1222 | } |
|
|
1223 | } |
|
|
1224 | |
|
|
1225 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
|
|
1226 | |
|
|
1227 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
|
|
1228 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
|
|
1229 | return $self->_error ($!, 1); |
|
|
1230 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
|
|
1231 | return $self->_error (&Errno::EIO, 1); |
|
|
1232 | } |
|
|
1233 | |
|
|
1234 | # all others are fine for our purposes |
|
|
1235 | } |
|
|
1236 | } |
1514 | } |
1237 | |
1515 | |
1238 | =item $handle->starttls ($tls[, $tls_ctx]) |
1516 | =item $handle->starttls ($tls[, $tls_ctx]) |
1239 | |
1517 | |
1240 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
1518 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
… | |
… | |
1242 | C<starttls>. |
1520 | C<starttls>. |
1243 | |
1521 | |
1244 | The first argument is the same as the C<tls> constructor argument (either |
1522 | The first argument is the same as the C<tls> constructor argument (either |
1245 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
1523 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
1246 | |
1524 | |
1247 | The second argument is the optional C<Net::SSLeay::CTX> object that is |
1525 | The second argument is the optional C<AnyEvent::TLS> object that is used |
1248 | used when AnyEvent::Handle has to create its own TLS connection object. |
1526 | when AnyEvent::Handle has to create its own TLS connection object, or |
|
|
1527 | a hash reference with C<< key => value >> pairs that will be used to |
|
|
1528 | construct a new context. |
1249 | |
1529 | |
1250 | The TLS connection object will end up in C<< $handle->{tls} >> after this |
1530 | The TLS connection object will end up in C<< $handle->{tls} >>, the TLS |
1251 | call and can be used or changed to your liking. Note that the handshake |
1531 | context in C<< $handle->{tls_ctx} >> after this call and can be used or |
1252 | might have already started when this function returns. |
1532 | changed to your liking. Note that the handshake might have already started |
|
|
1533 | when this function returns. |
1253 | |
1534 | |
|
|
1535 | If it an error to start a TLS handshake more than once per |
|
|
1536 | AnyEvent::Handle object (this is due to bugs in OpenSSL). |
|
|
1537 | |
1254 | =cut |
1538 | =cut |
|
|
1539 | |
|
|
1540 | our %TLS_CACHE; #TODO not yet documented, should we? |
1255 | |
1541 | |
1256 | sub starttls { |
1542 | sub starttls { |
1257 | my ($self, $ssl, $ctx) = @_; |
1543 | my ($self, $ssl, $ctx) = @_; |
1258 | |
1544 | |
1259 | $self->stoptls; |
1545 | require Net::SSLeay; |
1260 | |
1546 | |
1261 | if ($ssl eq "accept") { |
1547 | Carp::croak "it is an error to call starttls more than once on an AnyEvent::Handle object" |
1262 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
1548 | if $self->{tls}; |
1263 | Net::SSLeay::set_accept_state ($ssl); |
1549 | |
1264 | } elsif ($ssl eq "connect") { |
1550 | $ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL (); |
1265 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
1551 | $ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ (); |
1266 | Net::SSLeay::set_connect_state ($ssl); |
1552 | |
|
|
1553 | $ctx ||= $self->{tls_ctx}; |
|
|
1554 | |
|
|
1555 | if ("HASH" eq ref $ctx) { |
|
|
1556 | require AnyEvent::TLS; |
|
|
1557 | |
|
|
1558 | local $Carp::CarpLevel = 1; # skip ourselves when creating a new context |
|
|
1559 | |
|
|
1560 | if ($ctx->{cache}) { |
|
|
1561 | my $key = $ctx+0; |
|
|
1562 | $ctx = $TLS_CACHE{$key} ||= new AnyEvent::TLS %$ctx; |
|
|
1563 | } else { |
|
|
1564 | $ctx = new AnyEvent::TLS %$ctx; |
|
|
1565 | } |
|
|
1566 | } |
1267 | } |
1567 | |
1268 | |
1568 | $self->{tls_ctx} = $ctx || TLS_CTX (); |
1269 | $self->{tls} = $ssl; |
1569 | $self->{tls} = $ssl = $self->{tls_ctx}->_get_session ($ssl, $self, $self->{peername}); |
1270 | |
1570 | |
1271 | # basically, this is deep magic (because SSL_read should have the same issues) |
1571 | # basically, this is deep magic (because SSL_read should have the same issues) |
1272 | # but the openssl maintainers basically said: "trust us, it just works". |
1572 | # but the openssl maintainers basically said: "trust us, it just works". |
1273 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
1573 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
1274 | # and mismaintained ssleay-module doesn't even offer them). |
1574 | # and mismaintained ssleay-module doesn't even offer them). |
1275 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
1575 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
|
|
1576 | # |
|
|
1577 | # in short: this is a mess. |
|
|
1578 | # |
|
|
1579 | # note that we do not try to keep the length constant between writes as we are required to do. |
|
|
1580 | # we assume that most (but not all) of this insanity only applies to non-blocking cases, |
|
|
1581 | # and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to |
|
|
1582 | # have identity issues in that area. |
1276 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
1583 | # Net::SSLeay::CTX_set_mode ($ssl, |
1277 | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
1584 | # (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
1278 | | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
1585 | # | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
|
|
1586 | Net::SSLeay::CTX_set_mode ($ssl, 1|2); |
1279 | |
1587 | |
1280 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1588 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1281 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1589 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1282 | |
1590 | |
1283 | Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio}); |
1591 | Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio}); |
1284 | |
1592 | |
1285 | $self->{filter_w} = sub { |
1593 | $self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) } |
1286 | $_[0]{_tls_wbuf} .= ${$_[1]}; |
1594 | if $self->{on_starttls}; |
1287 | &_dotls; |
1595 | |
1288 | }; |
1596 | &_dotls; # need to trigger the initial handshake |
1289 | $self->{filter_r} = sub { |
1597 | $self->start_read; # make sure we actually do read |
1290 | Net::SSLeay::BIO_write ($_[0]{_rbio}, ${$_[1]}); |
|
|
1291 | &_dotls; |
|
|
1292 | }; |
|
|
1293 | } |
1598 | } |
1294 | |
1599 | |
1295 | =item $handle->stoptls |
1600 | =item $handle->stoptls |
1296 | |
1601 | |
1297 | Destroys the SSL connection, if any. Partial read or write data will be |
1602 | Shuts down the SSL connection - this makes a proper EOF handshake by |
1298 | lost. |
1603 | sending a close notify to the other side, but since OpenSSL doesn't |
|
|
1604 | support non-blocking shut downs, it is not possible to re-use the stream |
|
|
1605 | afterwards. |
1299 | |
1606 | |
1300 | =cut |
1607 | =cut |
1301 | |
1608 | |
1302 | sub stoptls { |
1609 | sub stoptls { |
1303 | my ($self) = @_; |
1610 | my ($self) = @_; |
1304 | |
1611 | |
1305 | Net::SSLeay::free (delete $self->{tls}) if $self->{tls}; |
1612 | if ($self->{tls}) { |
|
|
1613 | Net::SSLeay::shutdown ($self->{tls}); |
1306 | |
1614 | |
1307 | delete $self->{_rbio}; |
1615 | &_dotls; |
1308 | delete $self->{_wbio}; |
1616 | |
1309 | delete $self->{_tls_wbuf}; |
1617 | # # we don't give a shit. no, we do, but we can't. no...#d# |
1310 | delete $self->{filter_r}; |
1618 | # # we, we... have to use openssl :/#d# |
1311 | delete $self->{filter_w}; |
1619 | # &_freetls;#d# |
|
|
1620 | } |
|
|
1621 | } |
|
|
1622 | |
|
|
1623 | sub _freetls { |
|
|
1624 | my ($self) = @_; |
|
|
1625 | |
|
|
1626 | return unless $self->{tls}; |
|
|
1627 | |
|
|
1628 | $self->{tls_ctx}->_put_session (delete $self->{tls}); |
|
|
1629 | |
|
|
1630 | delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)}; |
1312 | } |
1631 | } |
1313 | |
1632 | |
1314 | sub DESTROY { |
1633 | sub DESTROY { |
1315 | my $self = shift; |
1634 | my ($self) = @_; |
1316 | |
1635 | |
1317 | $self->stoptls; |
1636 | &_freetls; |
1318 | |
1637 | |
1319 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
1638 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
1320 | |
1639 | |
1321 | if ($linger && length $self->{wbuf}) { |
1640 | if ($linger && length $self->{wbuf}) { |
1322 | my $fh = delete $self->{fh}; |
1641 | my $fh = delete $self->{fh}; |
… | |
… | |
1337 | @linger = (); |
1656 | @linger = (); |
1338 | }); |
1657 | }); |
1339 | } |
1658 | } |
1340 | } |
1659 | } |
1341 | |
1660 | |
|
|
1661 | =item $handle->destroy |
|
|
1662 | |
|
|
1663 | Shuts down the handle object as much as possible - this call ensures that |
|
|
1664 | no further callbacks will be invoked and as many resources as possible |
|
|
1665 | will be freed. You must not call any methods on the object afterwards. |
|
|
1666 | |
|
|
1667 | Normally, you can just "forget" any references to an AnyEvent::Handle |
|
|
1668 | object and it will simply shut down. This works in fatal error and EOF |
|
|
1669 | callbacks, as well as code outside. It does I<NOT> work in a read or write |
|
|
1670 | callback, so when you want to destroy the AnyEvent::Handle object from |
|
|
1671 | within such an callback. You I<MUST> call C<< ->destroy >> explicitly in |
|
|
1672 | that case. |
|
|
1673 | |
|
|
1674 | Destroying the handle object in this way has the advantage that callbacks |
|
|
1675 | will be removed as well, so if those are the only reference holders (as |
|
|
1676 | is common), then one doesn't need to do anything special to break any |
|
|
1677 | reference cycles. |
|
|
1678 | |
|
|
1679 | The handle might still linger in the background and write out remaining |
|
|
1680 | data, as specified by the C<linger> option, however. |
|
|
1681 | |
|
|
1682 | =cut |
|
|
1683 | |
|
|
1684 | sub destroy { |
|
|
1685 | my ($self) = @_; |
|
|
1686 | |
|
|
1687 | $self->DESTROY; |
|
|
1688 | %$self = (); |
|
|
1689 | } |
|
|
1690 | |
1342 | =item AnyEvent::Handle::TLS_CTX |
1691 | =item AnyEvent::Handle::TLS_CTX |
1343 | |
1692 | |
1344 | This function creates and returns the Net::SSLeay::CTX object used by |
1693 | This function creates and returns the AnyEvent::TLS object used by default |
1345 | default for TLS mode. |
1694 | for TLS mode. |
1346 | |
1695 | |
1347 | The context is created like this: |
1696 | The context is created by calling L<AnyEvent::TLS> without any arguments. |
1348 | |
|
|
1349 | Net::SSLeay::load_error_strings; |
|
|
1350 | Net::SSLeay::SSLeay_add_ssl_algorithms; |
|
|
1351 | Net::SSLeay::randomize; |
|
|
1352 | |
|
|
1353 | my $CTX = Net::SSLeay::CTX_new; |
|
|
1354 | |
|
|
1355 | Net::SSLeay::CTX_set_options $CTX, Net::SSLeay::OP_ALL |
|
|
1356 | |
1697 | |
1357 | =cut |
1698 | =cut |
1358 | |
1699 | |
1359 | our $TLS_CTX; |
1700 | our $TLS_CTX; |
1360 | |
1701 | |
1361 | sub TLS_CTX() { |
1702 | sub TLS_CTX() { |
1362 | $TLS_CTX || do { |
1703 | $TLS_CTX ||= do { |
1363 | require Net::SSLeay; |
1704 | require AnyEvent::TLS; |
1364 | |
1705 | |
1365 | Net::SSLeay::load_error_strings (); |
1706 | new AnyEvent::TLS |
1366 | Net::SSLeay::SSLeay_add_ssl_algorithms (); |
|
|
1367 | Net::SSLeay::randomize (); |
|
|
1368 | |
|
|
1369 | $TLS_CTX = Net::SSLeay::CTX_new (); |
|
|
1370 | |
|
|
1371 | Net::SSLeay::CTX_set_options ($TLS_CTX, Net::SSLeay::OP_ALL ()); |
|
|
1372 | |
|
|
1373 | $TLS_CTX |
|
|
1374 | } |
1707 | } |
1375 | } |
1708 | } |
1376 | |
1709 | |
1377 | =back |
1710 | =back |
|
|
1711 | |
|
|
1712 | |
|
|
1713 | =head1 NONFREQUENTLY ASKED QUESTIONS |
|
|
1714 | |
|
|
1715 | =over 4 |
|
|
1716 | |
|
|
1717 | =item I C<undef> the AnyEvent::Handle reference inside my callback and |
|
|
1718 | still get further invocations! |
|
|
1719 | |
|
|
1720 | That's because AnyEvent::Handle keeps a reference to itself when handling |
|
|
1721 | read or write callbacks. |
|
|
1722 | |
|
|
1723 | It is only safe to "forget" the reference inside EOF or error callbacks, |
|
|
1724 | from within all other callbacks, you need to explicitly call the C<< |
|
|
1725 | ->destroy >> method. |
|
|
1726 | |
|
|
1727 | =item I get different callback invocations in TLS mode/Why can't I pause |
|
|
1728 | reading? |
|
|
1729 | |
|
|
1730 | Unlike, say, TCP, TLS connections do not consist of two independent |
|
|
1731 | communication channels, one for each direction. Or put differently. The |
|
|
1732 | read and write directions are not independent of each other: you cannot |
|
|
1733 | write data unless you are also prepared to read, and vice versa. |
|
|
1734 | |
|
|
1735 | This can mean than, in TLS mode, you might get C<on_error> or C<on_eof> |
|
|
1736 | callback invocations when you are not expecting any read data - the reason |
|
|
1737 | is that AnyEvent::Handle always reads in TLS mode. |
|
|
1738 | |
|
|
1739 | During the connection, you have to make sure that you always have a |
|
|
1740 | non-empty read-queue, or an C<on_read> watcher. At the end of the |
|
|
1741 | connection (or when you no longer want to use it) you can call the |
|
|
1742 | C<destroy> method. |
|
|
1743 | |
|
|
1744 | =item How do I read data until the other side closes the connection? |
|
|
1745 | |
|
|
1746 | If you just want to read your data into a perl scalar, the easiest way |
|
|
1747 | to achieve this is by setting an C<on_read> callback that does nothing, |
|
|
1748 | clearing the C<on_eof> callback and in the C<on_error> callback, the data |
|
|
1749 | will be in C<$_[0]{rbuf}>: |
|
|
1750 | |
|
|
1751 | $handle->on_read (sub { }); |
|
|
1752 | $handle->on_eof (undef); |
|
|
1753 | $handle->on_error (sub { |
|
|
1754 | my $data = delete $_[0]{rbuf}; |
|
|
1755 | }); |
|
|
1756 | |
|
|
1757 | The reason to use C<on_error> is that TCP connections, due to latencies |
|
|
1758 | and packets loss, might get closed quite violently with an error, when in |
|
|
1759 | fact, all data has been received. |
|
|
1760 | |
|
|
1761 | It is usually better to use acknowledgements when transferring data, |
|
|
1762 | to make sure the other side hasn't just died and you got the data |
|
|
1763 | intact. This is also one reason why so many internet protocols have an |
|
|
1764 | explicit QUIT command. |
|
|
1765 | |
|
|
1766 | =item I don't want to destroy the handle too early - how do I wait until |
|
|
1767 | all data has been written? |
|
|
1768 | |
|
|
1769 | After writing your last bits of data, set the C<on_drain> callback |
|
|
1770 | and destroy the handle in there - with the default setting of |
|
|
1771 | C<low_water_mark> this will be called precisely when all data has been |
|
|
1772 | written to the socket: |
|
|
1773 | |
|
|
1774 | $handle->push_write (...); |
|
|
1775 | $handle->on_drain (sub { |
|
|
1776 | warn "all data submitted to the kernel\n"; |
|
|
1777 | undef $handle; |
|
|
1778 | }); |
|
|
1779 | |
|
|
1780 | If you just want to queue some data and then signal EOF to the other side, |
|
|
1781 | consider using C<< ->push_shutdown >> instead. |
|
|
1782 | |
|
|
1783 | =item I want to contact a TLS/SSL server, I don't care about security. |
|
|
1784 | |
|
|
1785 | If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS, |
|
|
1786 | simply connect to it and then create the AnyEvent::Handle with the C<tls> |
|
|
1787 | parameter: |
|
|
1788 | |
|
|
1789 | tcp_connect $host, $port, sub { |
|
|
1790 | my ($fh) = @_; |
|
|
1791 | |
|
|
1792 | my $handle = new AnyEvent::Handle |
|
|
1793 | fh => $fh, |
|
|
1794 | tls => "connect", |
|
|
1795 | on_error => sub { ... }; |
|
|
1796 | |
|
|
1797 | $handle->push_write (...); |
|
|
1798 | }; |
|
|
1799 | |
|
|
1800 | =item I want to contact a TLS/SSL server, I do care about security. |
|
|
1801 | |
|
|
1802 | Then you should additionally enable certificate verification, including |
|
|
1803 | peername verification, if the protocol you use supports it (see |
|
|
1804 | L<AnyEvent::TLS>, C<verify_peername>). |
|
|
1805 | |
|
|
1806 | E.g. for HTTPS: |
|
|
1807 | |
|
|
1808 | tcp_connect $host, $port, sub { |
|
|
1809 | my ($fh) = @_; |
|
|
1810 | |
|
|
1811 | my $handle = new AnyEvent::Handle |
|
|
1812 | fh => $fh, |
|
|
1813 | peername => $host, |
|
|
1814 | tls => "connect", |
|
|
1815 | tls_ctx => { verify => 1, verify_peername => "https" }, |
|
|
1816 | ... |
|
|
1817 | |
|
|
1818 | Note that you must specify the hostname you connected to (or whatever |
|
|
1819 | "peername" the protocol needs) as the C<peername> argument, otherwise no |
|
|
1820 | peername verification will be done. |
|
|
1821 | |
|
|
1822 | The above will use the system-dependent default set of trusted CA |
|
|
1823 | certificates. If you want to check against a specific CA, add the |
|
|
1824 | C<ca_file> (or C<ca_cert>) arguments to C<tls_ctx>: |
|
|
1825 | |
|
|
1826 | tls_ctx => { |
|
|
1827 | verify => 1, |
|
|
1828 | verify_peername => "https", |
|
|
1829 | ca_file => "my-ca-cert.pem", |
|
|
1830 | }, |
|
|
1831 | |
|
|
1832 | =item I want to create a TLS/SSL server, how do I do that? |
|
|
1833 | |
|
|
1834 | Well, you first need to get a server certificate and key. You have |
|
|
1835 | three options: a) ask a CA (buy one, use cacert.org etc.) b) create a |
|
|
1836 | self-signed certificate (cheap. check the search engine of your choice, |
|
|
1837 | there are many tutorials on the net) or c) make your own CA (tinyca2 is a |
|
|
1838 | nice program for that purpose). |
|
|
1839 | |
|
|
1840 | Then create a file with your private key (in PEM format, see |
|
|
1841 | L<AnyEvent::TLS>), followed by the certificate (also in PEM format). The |
|
|
1842 | file should then look like this: |
|
|
1843 | |
|
|
1844 | -----BEGIN RSA PRIVATE KEY----- |
|
|
1845 | ...header data |
|
|
1846 | ... lots of base64'y-stuff |
|
|
1847 | -----END RSA PRIVATE KEY----- |
|
|
1848 | |
|
|
1849 | -----BEGIN CERTIFICATE----- |
|
|
1850 | ... lots of base64'y-stuff |
|
|
1851 | -----END CERTIFICATE----- |
|
|
1852 | |
|
|
1853 | The important bits are the "PRIVATE KEY" and "CERTIFICATE" parts. Then |
|
|
1854 | specify this file as C<cert_file>: |
|
|
1855 | |
|
|
1856 | tcp_server undef, $port, sub { |
|
|
1857 | my ($fh) = @_; |
|
|
1858 | |
|
|
1859 | my $handle = new AnyEvent::Handle |
|
|
1860 | fh => $fh, |
|
|
1861 | tls => "accept", |
|
|
1862 | tls_ctx => { cert_file => "my-server-keycert.pem" }, |
|
|
1863 | ... |
|
|
1864 | |
|
|
1865 | When you have intermediate CA certificates that your clients might not |
|
|
1866 | know about, just append them to the C<cert_file>. |
|
|
1867 | |
|
|
1868 | =back |
|
|
1869 | |
1378 | |
1870 | |
1379 | =head1 SUBCLASSING AnyEvent::Handle |
1871 | =head1 SUBCLASSING AnyEvent::Handle |
1380 | |
1872 | |
1381 | In many cases, you might want to subclass AnyEvent::Handle. |
1873 | In many cases, you might want to subclass AnyEvent::Handle. |
1382 | |
1874 | |
… | |
… | |
1386 | =over 4 |
1878 | =over 4 |
1387 | |
1879 | |
1388 | =item * all constructor arguments become object members. |
1880 | =item * all constructor arguments become object members. |
1389 | |
1881 | |
1390 | At least initially, when you pass a C<tls>-argument to the constructor it |
1882 | At least initially, when you pass a C<tls>-argument to the constructor it |
1391 | will end up in C<< $handle->{tls} >>. Those members might be changes or |
1883 | will end up in C<< $handle->{tls} >>. Those members might be changed or |
1392 | mutated later on (for example C<tls> will hold the TLS connection object). |
1884 | mutated later on (for example C<tls> will hold the TLS connection object). |
1393 | |
1885 | |
1394 | =item * other object member names are prefixed with an C<_>. |
1886 | =item * other object member names are prefixed with an C<_>. |
1395 | |
1887 | |
1396 | All object members not explicitly documented (internal use) are prefixed |
1888 | All object members not explicitly documented (internal use) are prefixed |