1 | package AnyEvent::Handle; |
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2 | |
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3 | no warnings; |
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4 | use strict qw(subs vars); |
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5 | |
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6 | use AnyEvent (); |
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7 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
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8 | use Scalar::Util (); |
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9 | use Carp (); |
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10 | use Fcntl (); |
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11 | use Errno qw(EAGAIN EINTR); |
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12 | |
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13 | =head1 NAME |
1 | =head1 NAME |
14 | |
2 | |
15 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
3 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
16 | |
4 | |
17 | =cut |
5 | =cut |
18 | |
6 | |
19 | our $VERSION = 4.3; |
7 | our $VERSION = 4.92; |
20 | |
8 | |
21 | =head1 SYNOPSIS |
9 | =head1 SYNOPSIS |
22 | |
10 | |
23 | use AnyEvent; |
11 | use AnyEvent; |
24 | use AnyEvent::Handle; |
12 | use AnyEvent::Handle; |
25 | |
13 | |
26 | my $cv = AnyEvent->condvar; |
14 | my $cv = AnyEvent->condvar; |
27 | |
15 | |
28 | my $handle = |
16 | my $hdl; $hdl = new AnyEvent::Handle |
29 | AnyEvent::Handle->new ( |
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30 | fh => \*STDIN, |
17 | fh => \*STDIN, |
31 | on_eof => sub { |
18 | on_error => sub { |
32 | $cv->broadcast; |
19 | my ($hdl, $fatal, $msg) = @_; |
33 | }, |
20 | warn "got error $msg\n"; |
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21 | $hdl->destroy; |
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22 | $cv->send; |
34 | ); |
23 | ); |
35 | |
24 | |
36 | # send some request line |
25 | # send some request line |
37 | $handle->push_write ("getinfo\015\012"); |
26 | $hdl->push_write ("getinfo\015\012"); |
38 | |
27 | |
39 | # read the response line |
28 | # read the response line |
40 | $handle->push_read (line => sub { |
29 | $hdl->push_read (line => sub { |
41 | my ($handle, $line) = @_; |
30 | my ($hdl, $line) = @_; |
42 | warn "read line <$line>\n"; |
31 | warn "got line <$line>\n"; |
43 | $cv->send; |
32 | $cv->send; |
44 | }); |
33 | }); |
45 | |
34 | |
46 | $cv->recv; |
35 | $cv->recv; |
47 | |
36 | |
48 | =head1 DESCRIPTION |
37 | =head1 DESCRIPTION |
49 | |
38 | |
50 | This module is a helper module to make it easier to do event-based I/O on |
39 | This module is a helper module to make it easier to do event-based I/O on |
51 | filehandles. For utility functions for doing non-blocking connects and accepts |
40 | filehandles. |
52 | on sockets see L<AnyEvent::Util>. |
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53 | |
41 | |
54 | The L<AnyEvent::Intro> tutorial contains some well-documented |
42 | The L<AnyEvent::Intro> tutorial contains some well-documented |
55 | AnyEvent::Handle examples. |
43 | AnyEvent::Handle examples. |
56 | |
44 | |
57 | In the following, when the documentation refers to of "bytes" then this |
45 | In the following, when the documentation refers to of "bytes" then this |
58 | means characters. As sysread and syswrite are used for all I/O, their |
46 | means characters. As sysread and syswrite are used for all I/O, their |
59 | treatment of characters applies to this module as well. |
47 | treatment of characters applies to this module as well. |
60 | |
48 | |
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49 | At the very minimum, you should specify C<fh> or C<connect>, and the |
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50 | C<on_error> callback. |
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51 | |
61 | All callbacks will be invoked with the handle object as their first |
52 | All callbacks will be invoked with the handle object as their first |
62 | argument. |
53 | argument. |
63 | |
54 | |
64 | =head2 SIGPIPE is not handled by this module |
55 | =cut |
65 | |
56 | |
66 | SIGPIPE is not handled by this module, so one of the practical |
57 | package AnyEvent::Handle; |
67 | requirements of using it is to ignore SIGPIPE (C<$SIG{PIPE} = |
58 | |
68 | 'IGNORE'>). At least, this is highly recommend in a networked program: If |
59 | use Scalar::Util (); |
69 | you use AnyEvent::Handle in a filter program (like sort), exiting on |
60 | use List::Util (); |
70 | SIGPIPE is probably the right thing to do. |
61 | use Carp (); |
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62 | use Errno qw(EAGAIN EINTR); |
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63 | |
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64 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
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65 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
71 | |
66 | |
72 | =head1 METHODS |
67 | =head1 METHODS |
73 | |
68 | |
74 | =over 4 |
69 | =over 4 |
75 | |
70 | |
76 | =item B<new (%args)> |
71 | =item $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value... |
77 | |
72 | |
78 | The constructor supports these arguments (all as key => value pairs). |
73 | The constructor supports these arguments (all as C<< key => value >> pairs). |
79 | |
74 | |
80 | =over 4 |
75 | =over 4 |
81 | |
76 | |
82 | =item fh => $filehandle [MANDATORY] |
77 | =item fh => $filehandle [C<fh> or C<connect> MANDATORY] |
83 | |
78 | |
84 | The filehandle this L<AnyEvent::Handle> object will operate on. |
79 | The filehandle this L<AnyEvent::Handle> object will operate on. |
85 | |
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86 | NOTE: The filehandle will be set to non-blocking mode (using |
80 | NOTE: The filehandle will be set to non-blocking mode (using |
87 | C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in |
81 | C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in |
88 | that mode. |
82 | that mode. |
89 | |
83 | |
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84 | =item connect => [$host, $service] [C<fh> or C<connect> MANDATORY] |
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85 | |
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86 | Try to connect to the specified host and service (port), using |
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87 | C<AnyEvent::Socket::tcp_connect>. The C<$host> additionally becomes the |
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88 | default C<peername>. |
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89 | |
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90 | You have to specify either this parameter, or C<fh>, above. |
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91 | |
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92 | It is possible to push requests on the read and write queues, and modify |
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93 | properties of the stream, even while AnyEvent::Handle is connecting. |
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94 | |
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95 | When this parameter is specified, then the C<on_prepare>, |
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96 | C<on_connect_error> and C<on_connect> callbacks will be called under the |
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97 | appropriate circumstances: |
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98 | |
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99 | =over 4 |
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100 | |
90 | =item on_eof => $cb->($handle) |
101 | =item on_prepare => $cb->($handle) |
91 | |
102 | |
92 | Set the callback to be called when an end-of-file condition is detected, |
103 | This (rarely used) callback is called before a new connection is |
93 | i.e. in the case of a socket, when the other side has closed the |
104 | attempted, but after the file handle has been created. It could be used to |
94 | connection cleanly. |
105 | prepare the file handle with parameters required for the actual connect |
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106 | (as opposed to settings that can be changed when the connection is already |
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107 | established). |
95 | |
108 | |
96 | For sockets, this just means that the other side has stopped sending data, |
109 | The return value of this callback should be the connect timeout value in |
97 | you can still try to write data, and, in fact, one can return from the eof |
110 | seconds (or C<0>, or C<undef>, or the empty list, to indicate the default |
98 | callback and continue writing data, as only the read part has been shut |
111 | timeout is to be used). |
99 | down. |
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100 | |
112 | |
101 | While not mandatory, it is I<highly> recommended to set an eof callback, |
113 | =item on_connect => $cb->($handle, $host, $port, $retry->()) |
102 | otherwise you might end up with a closed socket while you are still |
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103 | waiting for data. |
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104 | |
114 | |
105 | If an EOF condition has been detected but no C<on_eof> callback has been |
115 | This callback is called when a connection has been successfully established. |
106 | set, then a fatal error will be raised with C<$!> set to <0>. |
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107 | |
116 | |
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117 | The actual numeric host and port (the socket peername) are passed as |
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118 | parameters, together with a retry callback. |
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119 | |
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120 | When, for some reason, the handle is not acceptable, then calling |
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121 | C<$retry> will continue with the next conenction target (in case of |
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122 | multi-homed hosts or SRV records there can be multiple connection |
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123 | endpoints). When it is called then the read and write queues, eof status, |
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124 | tls status and similar properties of the handle are being reset. |
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125 | |
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126 | In most cases, ignoring the C<$retry> parameter is the way to go. |
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127 | |
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128 | =item on_connect_error => $cb->($handle, $message) |
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129 | |
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130 | This callback is called when the conenction could not be |
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131 | established. C<$!> will contain the relevant error code, and C<$message> a |
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132 | message describing it (usually the same as C<"$!">). |
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133 | |
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134 | If this callback isn't specified, then C<on_error> will be called with a |
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135 | fatal error instead. |
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136 | |
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137 | =back |
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138 | |
108 | =item on_error => $cb->($handle, $fatal) |
139 | =item on_error => $cb->($handle, $fatal, $message) |
109 | |
140 | |
110 | This is the error callback, which is called when, well, some error |
141 | This is the error callback, which is called when, well, some error |
111 | occured, such as not being able to resolve the hostname, failure to |
142 | occured, such as not being able to resolve the hostname, failure to |
112 | connect or a read error. |
143 | connect or a read error. |
113 | |
144 | |
114 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
145 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
115 | fatal errors the handle object will be shut down and will not be usable |
146 | fatal errors the handle object will be destroyed (by a call to C<< -> |
116 | (but you are free to look at the current C<< ->rbuf >>). Examples of fatal |
147 | destroy >>) after invoking the error callback (which means you are free to |
117 | errors are an EOF condition with active (but unsatisifable) read watchers |
148 | examine the handle object). Examples of fatal errors are an EOF condition |
118 | (C<EPIPE>) or I/O errors. |
149 | with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors. In |
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150 | cases where the other side can close the connection at their will it is |
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151 | often easiest to not report C<EPIPE> errors in this callback. |
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152 | |
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153 | AnyEvent::Handle tries to find an appropriate error code for you to check |
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154 | against, but in some cases (TLS errors), this does not work well. It is |
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155 | recommended to always output the C<$message> argument in human-readable |
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156 | error messages (it's usually the same as C<"$!">). |
119 | |
157 | |
120 | Non-fatal errors can be retried by simply returning, but it is recommended |
158 | Non-fatal errors can be retried by simply returning, but it is recommended |
121 | to simply ignore this parameter and instead abondon the handle object |
159 | to simply ignore this parameter and instead abondon the handle object |
122 | when this callback is invoked. Examples of non-fatal errors are timeouts |
160 | when this callback is invoked. Examples of non-fatal errors are timeouts |
123 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
161 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
124 | |
162 | |
125 | On callback entrance, the value of C<$!> contains the operating system |
163 | On callback entrance, the value of C<$!> contains the operating system |
126 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
164 | error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or |
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165 | C<EPROTO>). |
127 | |
166 | |
128 | While not mandatory, it is I<highly> recommended to set this callback, as |
167 | While not mandatory, it is I<highly> recommended to set this callback, as |
129 | you will not be notified of errors otherwise. The default simply calls |
168 | you will not be notified of errors otherwise. The default simply calls |
130 | C<croak>. |
169 | C<croak>. |
131 | |
170 | |
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135 | and no read request is in the queue (unlike read queue callbacks, this |
174 | and no read request is in the queue (unlike read queue callbacks, this |
136 | callback will only be called when at least one octet of data is in the |
175 | callback will only be called when at least one octet of data is in the |
137 | read buffer). |
176 | read buffer). |
138 | |
177 | |
139 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
178 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
140 | method or access the C<$handle->{rbuf}> member directly. |
179 | method or access the C<< $handle->{rbuf} >> member directly. Note that you |
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180 | must not enlarge or modify the read buffer, you can only remove data at |
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181 | the beginning from it. |
141 | |
182 | |
142 | When an EOF condition is detected then AnyEvent::Handle will first try to |
183 | When an EOF condition is detected then AnyEvent::Handle will first try to |
143 | feed all the remaining data to the queued callbacks and C<on_read> before |
184 | feed all the remaining data to the queued callbacks and C<on_read> before |
144 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
185 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
145 | error will be raised (with C<$!> set to C<EPIPE>). |
186 | error will be raised (with C<$!> set to C<EPIPE>). |
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187 | |
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188 | Note that, unlike requests in the read queue, an C<on_read> callback |
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189 | doesn't mean you I<require> some data: if there is an EOF and there |
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190 | are outstanding read requests then an error will be flagged. With an |
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191 | C<on_read> callback, the C<on_eof> callback will be invoked. |
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192 | |
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193 | =item on_eof => $cb->($handle) |
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194 | |
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195 | Set the callback to be called when an end-of-file condition is detected, |
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196 | i.e. in the case of a socket, when the other side has closed the |
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197 | connection cleanly, and there are no outstanding read requests in the |
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198 | queue (if there are read requests, then an EOF counts as an unexpected |
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199 | connection close and will be flagged as an error). |
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200 | |
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201 | For sockets, this just means that the other side has stopped sending data, |
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202 | you can still try to write data, and, in fact, one can return from the EOF |
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203 | callback and continue writing data, as only the read part has been shut |
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204 | down. |
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205 | |
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206 | If an EOF condition has been detected but no C<on_eof> callback has been |
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207 | set, then a fatal error will be raised with C<$!> set to <0>. |
146 | |
208 | |
147 | =item on_drain => $cb->($handle) |
209 | =item on_drain => $cb->($handle) |
148 | |
210 | |
149 | This sets the callback that is called when the write buffer becomes empty |
211 | This sets the callback that is called when the write buffer becomes empty |
150 | (or when the callback is set and the buffer is empty already). |
212 | (or when the callback is set and the buffer is empty already). |
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157 | memory and push it into the queue, but instead only read more data from |
219 | memory and push it into the queue, but instead only read more data from |
158 | the file when the write queue becomes empty. |
220 | the file when the write queue becomes empty. |
159 | |
221 | |
160 | =item timeout => $fractional_seconds |
222 | =item timeout => $fractional_seconds |
161 | |
223 | |
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224 | =item rtimeout => $fractional_seconds |
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225 | |
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226 | =item wtimeout => $fractional_seconds |
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227 | |
162 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
228 | If non-zero, then these enables an "inactivity" timeout: whenever this |
163 | seconds pass without a successful read or write on the underlying file |
229 | many seconds pass without a successful read or write on the underlying |
164 | handle, the C<on_timeout> callback will be invoked (and if that one is |
230 | file handle (or a call to C<timeout_reset>), the C<on_timeout> callback |
165 | missing, a non-fatal C<ETIMEDOUT> error will be raised). |
231 | will be invoked (and if that one is missing, a non-fatal C<ETIMEDOUT> |
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232 | error will be raised). |
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233 | |
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234 | There are three variants of the timeouts that work fully independent |
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235 | of each other, for both read and write, just read, and just write: |
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236 | C<timeout>, C<rtimeout> and C<wtimeout>, with corresponding callbacks |
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237 | C<on_timeout>, C<on_rtimeout> and C<on_wtimeout>, and reset functions |
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238 | C<timeout_reset>, C<rtimeout_reset>, and C<wtimeout_reset>. |
166 | |
239 | |
167 | Note that timeout processing is also active when you currently do not have |
240 | Note that timeout processing is also active when you currently do not have |
168 | any outstanding read or write requests: If you plan to keep the connection |
241 | any outstanding read or write requests: If you plan to keep the connection |
169 | idle then you should disable the timout temporarily or ignore the timeout |
242 | idle then you should disable the timout temporarily or ignore the timeout |
170 | in the C<on_timeout> callback, in which case AnyEvent::Handle will simply |
243 | in the C<on_timeout> callback, in which case AnyEvent::Handle will simply |
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243 | |
316 | |
244 | This will not work for partial TLS data that could not be encoded |
317 | This will not work for partial TLS data that could not be encoded |
245 | yet. This data will be lost. Calling the C<stoptls> method in time might |
318 | yet. This data will be lost. Calling the C<stoptls> method in time might |
246 | help. |
319 | help. |
247 | |
320 | |
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321 | =item peername => $string |
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322 | |
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323 | A string used to identify the remote site - usually the DNS hostname |
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324 | (I<not> IDN!) used to create the connection, rarely the IP address. |
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325 | |
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326 | Apart from being useful in error messages, this string is also used in TLS |
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327 | peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This |
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328 | verification will be skipped when C<peername> is not specified or |
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329 | C<undef>. |
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330 | |
248 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
331 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
249 | |
332 | |
250 | When this parameter is given, it enables TLS (SSL) mode, that means |
333 | When this parameter is given, it enables TLS (SSL) mode, that means |
251 | AnyEvent will start a TLS handshake as soon as the conenction has been |
334 | AnyEvent will start a TLS handshake as soon as the conenction has been |
252 | established and will transparently encrypt/decrypt data afterwards. |
335 | established and will transparently encrypt/decrypt data afterwards. |
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336 | |
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337 | All TLS protocol errors will be signalled as C<EPROTO>, with an |
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338 | appropriate error message. |
253 | |
339 | |
254 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
340 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
255 | automatically when you try to create a TLS handle): this module doesn't |
341 | automatically when you try to create a TLS handle): this module doesn't |
256 | have a dependency on that module, so if your module requires it, you have |
342 | have a dependency on that module, so if your module requires it, you have |
257 | to add the dependency yourself. |
343 | to add the dependency yourself. |
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261 | mode. |
347 | mode. |
262 | |
348 | |
263 | You can also provide your own TLS connection object, but you have |
349 | You can also provide your own TLS connection object, but you have |
264 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
350 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
265 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
351 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
266 | AnyEvent::Handle. |
352 | AnyEvent::Handle. Also, this module will take ownership of this connection |
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353 | object. |
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354 | |
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355 | At some future point, AnyEvent::Handle might switch to another TLS |
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356 | implementation, then the option to use your own session object will go |
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357 | away. |
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358 | |
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359 | B<IMPORTANT:> since Net::SSLeay "objects" are really only integers, |
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360 | passing in the wrong integer will lead to certain crash. This most often |
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361 | happens when one uses a stylish C<< tls => 1 >> and is surprised about the |
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362 | segmentation fault. |
267 | |
363 | |
268 | See the C<< ->starttls >> method for when need to start TLS negotiation later. |
364 | See the C<< ->starttls >> method for when need to start TLS negotiation later. |
269 | |
365 | |
270 | =item tls_ctx => $ssl_ctx |
366 | =item tls_ctx => $anyevent_tls |
271 | |
367 | |
272 | Use the given C<Net::SSLeay::CTX> object to create the new TLS connection |
368 | Use the given C<AnyEvent::TLS> object to create the new TLS connection |
273 | (unless a connection object was specified directly). If this parameter is |
369 | (unless a connection object was specified directly). If this parameter is |
274 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
370 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
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371 | |
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372 | Instead of an object, you can also specify a hash reference with C<< key |
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373 | => value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a |
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374 | new TLS context object. |
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375 | |
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376 | =item on_starttls => $cb->($handle, $success[, $error_message]) |
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377 | |
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378 | This callback will be invoked when the TLS/SSL handshake has finished. If |
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379 | C<$success> is true, then the TLS handshake succeeded, otherwise it failed |
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380 | (C<on_stoptls> will not be called in this case). |
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381 | |
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382 | The session in C<< $handle->{tls} >> can still be examined in this |
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383 | callback, even when the handshake was not successful. |
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384 | |
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385 | TLS handshake failures will not cause C<on_error> to be invoked when this |
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386 | callback is in effect, instead, the error message will be passed to C<on_starttls>. |
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387 | |
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388 | Without this callback, handshake failures lead to C<on_error> being |
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389 | called, as normal. |
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390 | |
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391 | Note that you cannot call C<starttls> right again in this callback. If you |
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392 | need to do that, start an zero-second timer instead whose callback can |
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393 | then call C<< ->starttls >> again. |
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394 | |
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395 | =item on_stoptls => $cb->($handle) |
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396 | |
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397 | When a SSLv3/TLS shutdown/close notify/EOF is detected and this callback is |
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398 | set, then it will be invoked after freeing the TLS session. If it is not, |
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399 | then a TLS shutdown condition will be treated like a normal EOF condition |
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400 | on the handle. |
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401 | |
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402 | The session in C<< $handle->{tls} >> can still be examined in this |
|
|
403 | callback. |
|
|
404 | |
|
|
405 | This callback will only be called on TLS shutdowns, not when the |
|
|
406 | underlying handle signals EOF. |
275 | |
407 | |
276 | =item json => JSON or JSON::XS object |
408 | =item json => JSON or JSON::XS object |
277 | |
409 | |
278 | This is the json coder object used by the C<json> read and write types. |
410 | This is the json coder object used by the C<json> read and write types. |
279 | |
411 | |
… | |
… | |
288 | |
420 | |
289 | =cut |
421 | =cut |
290 | |
422 | |
291 | sub new { |
423 | sub new { |
292 | my $class = shift; |
424 | my $class = shift; |
293 | |
|
|
294 | my $self = bless { @_ }, $class; |
425 | my $self = bless { @_ }, $class; |
295 | |
426 | |
296 | $self->{fh} or Carp::croak "mandatory argument fh is missing"; |
427 | if ($self->{fh}) { |
|
|
428 | $self->_start; |
|
|
429 | return unless $self->{fh}; # could be gone by now |
|
|
430 | |
|
|
431 | } elsif ($self->{connect}) { |
|
|
432 | require AnyEvent::Socket; |
|
|
433 | |
|
|
434 | $self->{peername} = $self->{connect}[0] |
|
|
435 | unless exists $self->{peername}; |
|
|
436 | |
|
|
437 | $self->{_skip_drain_rbuf} = 1; |
|
|
438 | |
|
|
439 | { |
|
|
440 | Scalar::Util::weaken (my $self = $self); |
|
|
441 | |
|
|
442 | $self->{_connect} = |
|
|
443 | AnyEvent::Socket::tcp_connect ( |
|
|
444 | $self->{connect}[0], |
|
|
445 | $self->{connect}[1], |
|
|
446 | sub { |
|
|
447 | my ($fh, $host, $port, $retry) = @_; |
|
|
448 | |
|
|
449 | if ($fh) { |
|
|
450 | $self->{fh} = $fh; |
|
|
451 | |
|
|
452 | delete $self->{_skip_drain_rbuf}; |
|
|
453 | $self->_start; |
|
|
454 | |
|
|
455 | $self->{on_connect} |
|
|
456 | and $self->{on_connect}($self, $host, $port, sub { |
|
|
457 | delete @$self{qw(fh _tw _ww _rw _eof _queue rbuf _wbuf tls _tls_rbuf _tls_wbuf)}; |
|
|
458 | $self->{_skip_drain_rbuf} = 1; |
|
|
459 | &$retry; |
|
|
460 | }); |
|
|
461 | |
|
|
462 | } else { |
|
|
463 | if ($self->{on_connect_error}) { |
|
|
464 | $self->{on_connect_error}($self, "$!"); |
|
|
465 | $self->destroy; |
|
|
466 | } else { |
|
|
467 | $self->_error ($!, 1); |
|
|
468 | } |
|
|
469 | } |
|
|
470 | }, |
|
|
471 | sub { |
|
|
472 | local $self->{fh} = $_[0]; |
|
|
473 | |
|
|
474 | $self->{on_prepare} |
|
|
475 | ? $self->{on_prepare}->($self) |
|
|
476 | : () |
|
|
477 | } |
|
|
478 | ); |
|
|
479 | } |
|
|
480 | |
|
|
481 | } else { |
|
|
482 | Carp::croak "AnyEvent::Handle: either an existing fh or the connect parameter must be specified"; |
|
|
483 | } |
|
|
484 | |
|
|
485 | $self |
|
|
486 | } |
|
|
487 | |
|
|
488 | sub _start { |
|
|
489 | my ($self) = @_; |
297 | |
490 | |
298 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
491 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
|
|
492 | |
|
|
493 | $self->{_activity} = |
|
|
494 | $self->{_ractivity} = |
|
|
495 | $self->{_wactivity} = AE::now; |
|
|
496 | |
|
|
497 | $self->timeout (delete $self->{timeout} ) if $self->{timeout}; |
|
|
498 | $self->rtimeout (delete $self->{rtimeout}) if $self->{rtimeout}; |
|
|
499 | $self->wtimeout (delete $self->{wtimeout}) if $self->{wtimeout}; |
|
|
500 | |
|
|
501 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
299 | |
502 | |
300 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}) |
503 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}) |
301 | if $self->{tls}; |
504 | if $self->{tls}; |
302 | |
505 | |
303 | $self->{_activity} = AnyEvent->now; |
|
|
304 | $self->_timeout; |
|
|
305 | |
|
|
306 | $self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain}; |
506 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
307 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
|
|
308 | |
507 | |
309 | $self->start_read |
508 | $self->start_read |
310 | if $self->{on_read}; |
509 | if $self->{on_read} || @{ $self->{_queue} }; |
311 | |
510 | |
312 | $self |
511 | $self->_drain_wbuf; |
313 | } |
512 | } |
314 | |
513 | |
315 | sub _shutdown { |
514 | #sub _shutdown { |
316 | my ($self) = @_; |
515 | # my ($self) = @_; |
317 | |
516 | # |
318 | delete $self->{_tw}; |
517 | # delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)}; |
319 | delete $self->{_rw}; |
518 | # $self->{_eof} = 1; # tell starttls et. al to stop trying |
320 | delete $self->{_ww}; |
519 | # |
321 | delete $self->{fh}; |
|
|
322 | |
|
|
323 | &_freetls; |
520 | # &_freetls; |
324 | |
521 | #} |
325 | delete $self->{on_read}; |
|
|
326 | delete $self->{_queue}; |
|
|
327 | } |
|
|
328 | |
522 | |
329 | sub _error { |
523 | sub _error { |
330 | my ($self, $errno, $fatal) = @_; |
524 | my ($self, $errno, $fatal, $message) = @_; |
331 | |
|
|
332 | $self->_shutdown |
|
|
333 | if $fatal; |
|
|
334 | |
525 | |
335 | $! = $errno; |
526 | $! = $errno; |
|
|
527 | $message ||= "$!"; |
336 | |
528 | |
337 | if ($self->{on_error}) { |
529 | if ($self->{on_error}) { |
338 | $self->{on_error}($self, $fatal); |
530 | $self->{on_error}($self, $fatal, $message); |
339 | } else { |
531 | $self->destroy if $fatal; |
|
|
532 | } elsif ($self->{fh}) { |
|
|
533 | $self->destroy; |
340 | Carp::croak "AnyEvent::Handle uncaught error: $!"; |
534 | Carp::croak "AnyEvent::Handle uncaught error: $message"; |
341 | } |
535 | } |
342 | } |
536 | } |
343 | |
537 | |
344 | =item $fh = $handle->fh |
538 | =item $fh = $handle->fh |
345 | |
539 | |
… | |
… | |
369 | $_[0]{on_eof} = $_[1]; |
563 | $_[0]{on_eof} = $_[1]; |
370 | } |
564 | } |
371 | |
565 | |
372 | =item $handle->on_timeout ($cb) |
566 | =item $handle->on_timeout ($cb) |
373 | |
567 | |
374 | Replace the current C<on_timeout> callback, or disables the callback (but |
568 | =item $handle->on_rtimeout ($cb) |
375 | not the timeout) if C<$cb> = C<undef>. See the C<timeout> constructor |
|
|
376 | argument and method. |
|
|
377 | |
569 | |
378 | =cut |
570 | =item $handle->on_wtimeout ($cb) |
379 | |
571 | |
380 | sub on_timeout { |
572 | Replace the current C<on_timeout>, C<on_rtimeout> or C<on_wtimeout> |
381 | $_[0]{on_timeout} = $_[1]; |
573 | callback, or disables the callback (but not the timeout) if C<$cb> = |
382 | } |
574 | C<undef>. See the C<timeout> constructor argument and method. |
|
|
575 | |
|
|
576 | =cut |
|
|
577 | |
|
|
578 | # see below |
383 | |
579 | |
384 | =item $handle->autocork ($boolean) |
580 | =item $handle->autocork ($boolean) |
385 | |
581 | |
386 | Enables or disables the current autocork behaviour (see C<autocork> |
582 | Enables or disables the current autocork behaviour (see C<autocork> |
387 | constructor argument). |
583 | constructor argument). Changes will only take effect on the next write. |
388 | |
584 | |
389 | =cut |
585 | =cut |
|
|
586 | |
|
|
587 | sub autocork { |
|
|
588 | $_[0]{autocork} = $_[1]; |
|
|
589 | } |
390 | |
590 | |
391 | =item $handle->no_delay ($boolean) |
591 | =item $handle->no_delay ($boolean) |
392 | |
592 | |
393 | Enables or disables the C<no_delay> setting (see constructor argument of |
593 | Enables or disables the C<no_delay> setting (see constructor argument of |
394 | the same name for details). |
594 | the same name for details). |
… | |
… | |
398 | sub no_delay { |
598 | sub no_delay { |
399 | $_[0]{no_delay} = $_[1]; |
599 | $_[0]{no_delay} = $_[1]; |
400 | |
600 | |
401 | eval { |
601 | eval { |
402 | local $SIG{__DIE__}; |
602 | local $SIG{__DIE__}; |
403 | setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]; |
603 | setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1] |
|
|
604 | if $_[0]{fh}; |
404 | }; |
605 | }; |
405 | } |
606 | } |
406 | |
607 | |
|
|
608 | =item $handle->on_starttls ($cb) |
|
|
609 | |
|
|
610 | Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument). |
|
|
611 | |
|
|
612 | =cut |
|
|
613 | |
|
|
614 | sub on_starttls { |
|
|
615 | $_[0]{on_starttls} = $_[1]; |
|
|
616 | } |
|
|
617 | |
|
|
618 | =item $handle->on_stoptls ($cb) |
|
|
619 | |
|
|
620 | Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument). |
|
|
621 | |
|
|
622 | =cut |
|
|
623 | |
|
|
624 | sub on_starttls { |
|
|
625 | $_[0]{on_stoptls} = $_[1]; |
|
|
626 | } |
|
|
627 | |
|
|
628 | =item $handle->rbuf_max ($max_octets) |
|
|
629 | |
|
|
630 | Configures the C<rbuf_max> setting (C<undef> disables it). |
|
|
631 | |
|
|
632 | =cut |
|
|
633 | |
|
|
634 | sub rbuf_max { |
|
|
635 | $_[0]{rbuf_max} = $_[1]; |
|
|
636 | } |
|
|
637 | |
407 | ############################################################################# |
638 | ############################################################################# |
408 | |
639 | |
409 | =item $handle->timeout ($seconds) |
640 | =item $handle->timeout ($seconds) |
410 | |
641 | |
|
|
642 | =item $handle->rtimeout ($seconds) |
|
|
643 | |
|
|
644 | =item $handle->wtimeout ($seconds) |
|
|
645 | |
411 | Configures (or disables) the inactivity timeout. |
646 | Configures (or disables) the inactivity timeout. |
412 | |
647 | |
413 | =cut |
648 | =item $handle->timeout_reset |
414 | |
649 | |
415 | sub timeout { |
650 | =item $handle->rtimeout_reset |
|
|
651 | |
|
|
652 | =item $handle->wtimeout_reset |
|
|
653 | |
|
|
654 | Reset the activity timeout, as if data was received or sent. |
|
|
655 | |
|
|
656 | These methods are cheap to call. |
|
|
657 | |
|
|
658 | =cut |
|
|
659 | |
|
|
660 | for my $dir ("", "r", "w") { |
|
|
661 | my $timeout = "${dir}timeout"; |
|
|
662 | my $tw = "_${dir}tw"; |
|
|
663 | my $on_timeout = "on_${dir}timeout"; |
|
|
664 | my $activity = "_${dir}activity"; |
|
|
665 | my $cb; |
|
|
666 | |
|
|
667 | *$on_timeout = sub { |
|
|
668 | $_[0]{$on_timeout} = $_[1]; |
|
|
669 | }; |
|
|
670 | |
|
|
671 | *$timeout = sub { |
416 | my ($self, $timeout) = @_; |
672 | my ($self, $new_value) = @_; |
417 | |
673 | |
418 | $self->{timeout} = $timeout; |
674 | $self->{$timeout} = $new_value; |
419 | $self->_timeout; |
675 | delete $self->{$tw}; &$cb; |
420 | } |
676 | }; |
421 | |
677 | |
|
|
678 | *{"${dir}timeout_reset"} = sub { |
|
|
679 | $_[0]{$activity} = AE::now; |
|
|
680 | }; |
|
|
681 | |
|
|
682 | # main workhorse: |
422 | # reset the timeout watcher, as neccessary |
683 | # reset the timeout watcher, as neccessary |
423 | # also check for time-outs |
684 | # also check for time-outs |
424 | sub _timeout { |
685 | $cb = sub { |
425 | my ($self) = @_; |
686 | my ($self) = @_; |
426 | |
687 | |
427 | if ($self->{timeout}) { |
688 | if ($self->{$timeout} && $self->{fh}) { |
428 | my $NOW = AnyEvent->now; |
689 | my $NOW = AE::now; |
429 | |
690 | |
430 | # when would the timeout trigger? |
691 | # when would the timeout trigger? |
431 | my $after = $self->{_activity} + $self->{timeout} - $NOW; |
692 | my $after = $self->{$activity} + $self->{$timeout} - $NOW; |
432 | |
693 | |
433 | # now or in the past already? |
694 | # now or in the past already? |
434 | if ($after <= 0) { |
695 | if ($after <= 0) { |
435 | $self->{_activity} = $NOW; |
696 | $self->{$activity} = $NOW; |
436 | |
697 | |
437 | if ($self->{on_timeout}) { |
698 | if ($self->{$on_timeout}) { |
438 | $self->{on_timeout}($self); |
699 | $self->{$on_timeout}($self); |
439 | } else { |
700 | } else { |
440 | $self->_error (&Errno::ETIMEDOUT); |
701 | $self->_error (Errno::ETIMEDOUT); |
|
|
702 | } |
|
|
703 | |
|
|
704 | # callback could have changed timeout value, optimise |
|
|
705 | return unless $self->{$timeout}; |
|
|
706 | |
|
|
707 | # calculate new after |
|
|
708 | $after = $self->{$timeout}; |
441 | } |
709 | } |
442 | |
710 | |
443 | # callback could have changed timeout value, optimise |
711 | Scalar::Util::weaken $self; |
444 | return unless $self->{timeout}; |
712 | return unless $self; # ->error could have destroyed $self |
445 | |
713 | |
446 | # calculate new after |
714 | $self->{$tw} ||= AE::timer $after, 0, sub { |
447 | $after = $self->{timeout}; |
715 | delete $self->{$tw}; |
|
|
716 | $cb->($self); |
|
|
717 | }; |
|
|
718 | } else { |
|
|
719 | delete $self->{$tw}; |
448 | } |
720 | } |
449 | |
|
|
450 | Scalar::Util::weaken $self; |
|
|
451 | return unless $self; # ->error could have destroyed $self |
|
|
452 | |
|
|
453 | $self->{_tw} ||= AnyEvent->timer (after => $after, cb => sub { |
|
|
454 | delete $self->{_tw}; |
|
|
455 | $self->_timeout; |
|
|
456 | }); |
|
|
457 | } else { |
|
|
458 | delete $self->{_tw}; |
|
|
459 | } |
721 | } |
460 | } |
722 | } |
461 | |
723 | |
462 | ############################################################################# |
724 | ############################################################################# |
463 | |
725 | |
… | |
… | |
508 | Scalar::Util::weaken $self; |
770 | Scalar::Util::weaken $self; |
509 | |
771 | |
510 | my $cb = sub { |
772 | my $cb = sub { |
511 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
773 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
512 | |
774 | |
513 | if ($len >= 0) { |
775 | if (defined $len) { |
514 | substr $self->{wbuf}, 0, $len, ""; |
776 | substr $self->{wbuf}, 0, $len, ""; |
515 | |
777 | |
516 | $self->{_activity} = AnyEvent->now; |
778 | $self->{_activity} = $self->{_wactivity} = AE::now; |
517 | |
779 | |
518 | $self->{on_drain}($self) |
780 | $self->{on_drain}($self) |
519 | if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}) |
781 | if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}) |
520 | && $self->{on_drain}; |
782 | && $self->{on_drain}; |
521 | |
783 | |
… | |
… | |
527 | |
789 | |
528 | # try to write data immediately |
790 | # try to write data immediately |
529 | $cb->() unless $self->{autocork}; |
791 | $cb->() unless $self->{autocork}; |
530 | |
792 | |
531 | # if still data left in wbuf, we need to poll |
793 | # if still data left in wbuf, we need to poll |
532 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
794 | $self->{_ww} = AE::io $self->{fh}, 1, $cb |
533 | if length $self->{wbuf}; |
795 | if length $self->{wbuf}; |
534 | }; |
796 | }; |
535 | } |
797 | } |
536 | |
798 | |
537 | our %WH; |
799 | our %WH; |
… | |
… | |
550 | ->($self, @_); |
812 | ->($self, @_); |
551 | } |
813 | } |
552 | |
814 | |
553 | if ($self->{tls}) { |
815 | if ($self->{tls}) { |
554 | $self->{_tls_wbuf} .= $_[0]; |
816 | $self->{_tls_wbuf} .= $_[0]; |
555 | &_dotls ($self); |
817 | &_dotls ($self) if $self->{fh}; |
556 | } else { |
818 | } else { |
557 | $self->{wbuf} .= $_[0]; |
819 | $self->{wbuf} .= $_[0]; |
558 | $self->_drain_wbuf; |
820 | $self->_drain_wbuf if $self->{fh}; |
559 | } |
821 | } |
560 | } |
822 | } |
561 | |
823 | |
562 | =item $handle->push_write (type => @args) |
824 | =item $handle->push_write (type => @args) |
563 | |
825 | |
… | |
… | |
652 | |
914 | |
653 | pack "w/a*", Storable::nfreeze ($ref) |
915 | pack "w/a*", Storable::nfreeze ($ref) |
654 | }; |
916 | }; |
655 | |
917 | |
656 | =back |
918 | =back |
|
|
919 | |
|
|
920 | =item $handle->push_shutdown |
|
|
921 | |
|
|
922 | Sometimes you know you want to close the socket after writing your data |
|
|
923 | before it was actually written. One way to do that is to replace your |
|
|
924 | C<on_drain> handler by a callback that shuts down the socket (and set |
|
|
925 | C<low_water_mark> to C<0>). This method is a shorthand for just that, and |
|
|
926 | replaces the C<on_drain> callback with: |
|
|
927 | |
|
|
928 | sub { shutdown $_[0]{fh}, 1 } # for push_shutdown |
|
|
929 | |
|
|
930 | This simply shuts down the write side and signals an EOF condition to the |
|
|
931 | the peer. |
|
|
932 | |
|
|
933 | You can rely on the normal read queue and C<on_eof> handling |
|
|
934 | afterwards. This is the cleanest way to close a connection. |
|
|
935 | |
|
|
936 | =cut |
|
|
937 | |
|
|
938 | sub push_shutdown { |
|
|
939 | my ($self) = @_; |
|
|
940 | |
|
|
941 | delete $self->{low_water_mark}; |
|
|
942 | $self->on_drain (sub { shutdown $_[0]{fh}, 1 }); |
|
|
943 | } |
657 | |
944 | |
658 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
945 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
659 | |
946 | |
660 | This function (not method) lets you add your own types to C<push_write>. |
947 | This function (not method) lets you add your own types to C<push_write>. |
661 | Whenever the given C<type> is used, C<push_write> will invoke the code |
948 | Whenever the given C<type> is used, C<push_write> will invoke the code |
… | |
… | |
755 | =cut |
1042 | =cut |
756 | |
1043 | |
757 | sub _drain_rbuf { |
1044 | sub _drain_rbuf { |
758 | my ($self) = @_; |
1045 | my ($self) = @_; |
759 | |
1046 | |
|
|
1047 | # avoid recursion |
|
|
1048 | return if $self->{_skip_drain_rbuf}; |
760 | local $self->{_in_drain} = 1; |
1049 | local $self->{_skip_drain_rbuf} = 1; |
761 | |
|
|
762 | if ( |
|
|
763 | defined $self->{rbuf_max} |
|
|
764 | && $self->{rbuf_max} < length $self->{rbuf} |
|
|
765 | ) { |
|
|
766 | $self->_error (&Errno::ENOSPC, 1), return; |
|
|
767 | } |
|
|
768 | |
1050 | |
769 | while () { |
1051 | while () { |
|
|
1052 | # we need to use a separate tls read buffer, as we must not receive data while |
|
|
1053 | # we are draining the buffer, and this can only happen with TLS. |
|
|
1054 | $self->{rbuf} .= delete $self->{_tls_rbuf} |
|
|
1055 | if exists $self->{_tls_rbuf}; |
|
|
1056 | |
770 | my $len = length $self->{rbuf}; |
1057 | my $len = length $self->{rbuf}; |
771 | |
1058 | |
772 | if (my $cb = shift @{ $self->{_queue} }) { |
1059 | if (my $cb = shift @{ $self->{_queue} }) { |
773 | unless ($cb->($self)) { |
1060 | unless ($cb->($self)) { |
774 | if ($self->{_eof}) { |
1061 | # no progress can be made |
775 | # no progress can be made (not enough data and no data forthcoming) |
1062 | # (not enough data and no data forthcoming) |
776 | $self->_error (&Errno::EPIPE, 1), return; |
1063 | $self->_error (Errno::EPIPE, 1), return |
777 | } |
1064 | if $self->{_eof}; |
778 | |
1065 | |
779 | unshift @{ $self->{_queue} }, $cb; |
1066 | unshift @{ $self->{_queue} }, $cb; |
780 | last; |
1067 | last; |
781 | } |
1068 | } |
782 | } elsif ($self->{on_read}) { |
1069 | } elsif ($self->{on_read}) { |
… | |
… | |
789 | && !@{ $self->{_queue} } # and the queue is still empty |
1076 | && !@{ $self->{_queue} } # and the queue is still empty |
790 | && $self->{on_read} # but we still have on_read |
1077 | && $self->{on_read} # but we still have on_read |
791 | ) { |
1078 | ) { |
792 | # no further data will arrive |
1079 | # no further data will arrive |
793 | # so no progress can be made |
1080 | # so no progress can be made |
794 | $self->_error (&Errno::EPIPE, 1), return |
1081 | $self->_error (Errno::EPIPE, 1), return |
795 | if $self->{_eof}; |
1082 | if $self->{_eof}; |
796 | |
1083 | |
797 | last; # more data might arrive |
1084 | last; # more data might arrive |
798 | } |
1085 | } |
799 | } else { |
1086 | } else { |
… | |
… | |
802 | last; |
1089 | last; |
803 | } |
1090 | } |
804 | } |
1091 | } |
805 | |
1092 | |
806 | if ($self->{_eof}) { |
1093 | if ($self->{_eof}) { |
807 | if ($self->{on_eof}) { |
1094 | $self->{on_eof} |
808 | $self->{on_eof}($self) |
1095 | ? $self->{on_eof}($self) |
809 | } else { |
1096 | : $self->_error (0, 1, "Unexpected end-of-file"); |
810 | $self->_error (0, 1); |
1097 | |
811 | } |
1098 | return; |
|
|
1099 | } |
|
|
1100 | |
|
|
1101 | if ( |
|
|
1102 | defined $self->{rbuf_max} |
|
|
1103 | && $self->{rbuf_max} < length $self->{rbuf} |
|
|
1104 | ) { |
|
|
1105 | $self->_error (Errno::ENOSPC, 1), return; |
812 | } |
1106 | } |
813 | |
1107 | |
814 | # may need to restart read watcher |
1108 | # may need to restart read watcher |
815 | unless ($self->{_rw}) { |
1109 | unless ($self->{_rw}) { |
816 | $self->start_read |
1110 | $self->start_read |
… | |
… | |
828 | |
1122 | |
829 | sub on_read { |
1123 | sub on_read { |
830 | my ($self, $cb) = @_; |
1124 | my ($self, $cb) = @_; |
831 | |
1125 | |
832 | $self->{on_read} = $cb; |
1126 | $self->{on_read} = $cb; |
833 | $self->_drain_rbuf if $cb && !$self->{_in_drain}; |
1127 | $self->_drain_rbuf if $cb; |
834 | } |
1128 | } |
835 | |
1129 | |
836 | =item $handle->rbuf |
1130 | =item $handle->rbuf |
837 | |
1131 | |
838 | Returns the read buffer (as a modifiable lvalue). |
1132 | Returns the read buffer (as a modifiable lvalue). |
839 | |
1133 | |
840 | You can access the read buffer directly as the C<< ->{rbuf} >> member, if |
1134 | You can access the read buffer directly as the C<< ->{rbuf} >> |
841 | you want. |
1135 | member, if you want. However, the only operation allowed on the |
|
|
1136 | read buffer (apart from looking at it) is removing data from its |
|
|
1137 | beginning. Otherwise modifying or appending to it is not allowed and will |
|
|
1138 | lead to hard-to-track-down bugs. |
842 | |
1139 | |
843 | NOTE: The read buffer should only be used or modified if the C<on_read>, |
1140 | NOTE: The read buffer should only be used or modified if the C<on_read>, |
844 | C<push_read> or C<unshift_read> methods are used. The other read methods |
1141 | C<push_read> or C<unshift_read> methods are used. The other read methods |
845 | automatically manage the read buffer. |
1142 | automatically manage the read buffer. |
846 | |
1143 | |
… | |
… | |
887 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
1184 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
888 | ->($self, $cb, @_); |
1185 | ->($self, $cb, @_); |
889 | } |
1186 | } |
890 | |
1187 | |
891 | push @{ $self->{_queue} }, $cb; |
1188 | push @{ $self->{_queue} }, $cb; |
892 | $self->_drain_rbuf unless $self->{_in_drain}; |
1189 | $self->_drain_rbuf; |
893 | } |
1190 | } |
894 | |
1191 | |
895 | sub unshift_read { |
1192 | sub unshift_read { |
896 | my $self = shift; |
1193 | my $self = shift; |
897 | my $cb = pop; |
1194 | my $cb = pop; |
… | |
… | |
903 | ->($self, $cb, @_); |
1200 | ->($self, $cb, @_); |
904 | } |
1201 | } |
905 | |
1202 | |
906 | |
1203 | |
907 | unshift @{ $self->{_queue} }, $cb; |
1204 | unshift @{ $self->{_queue} }, $cb; |
908 | $self->_drain_rbuf unless $self->{_in_drain}; |
1205 | $self->_drain_rbuf; |
909 | } |
1206 | } |
910 | |
1207 | |
911 | =item $handle->push_read (type => @args, $cb) |
1208 | =item $handle->push_read (type => @args, $cb) |
912 | |
1209 | |
913 | =item $handle->unshift_read (type => @args, $cb) |
1210 | =item $handle->unshift_read (type => @args, $cb) |
… | |
… | |
1046 | return 1; |
1343 | return 1; |
1047 | } |
1344 | } |
1048 | |
1345 | |
1049 | # reject |
1346 | # reject |
1050 | if ($reject && $$rbuf =~ $reject) { |
1347 | if ($reject && $$rbuf =~ $reject) { |
1051 | $self->_error (&Errno::EBADMSG); |
1348 | $self->_error (Errno::EBADMSG); |
1052 | } |
1349 | } |
1053 | |
1350 | |
1054 | # skip |
1351 | # skip |
1055 | if ($skip && $$rbuf =~ $skip) { |
1352 | if ($skip && $$rbuf =~ $skip) { |
1056 | $data .= substr $$rbuf, 0, $+[0], ""; |
1353 | $data .= substr $$rbuf, 0, $+[0], ""; |
… | |
… | |
1072 | my ($self, $cb) = @_; |
1369 | my ($self, $cb) = @_; |
1073 | |
1370 | |
1074 | sub { |
1371 | sub { |
1075 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
1372 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
1076 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
1373 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
1077 | $self->_error (&Errno::EBADMSG); |
1374 | $self->_error (Errno::EBADMSG); |
1078 | } |
1375 | } |
1079 | return; |
1376 | return; |
1080 | } |
1377 | } |
1081 | |
1378 | |
1082 | my $len = $1; |
1379 | my $len = $1; |
… | |
… | |
1085 | my $string = $_[1]; |
1382 | my $string = $_[1]; |
1086 | $_[0]->unshift_read (chunk => 1, sub { |
1383 | $_[0]->unshift_read (chunk => 1, sub { |
1087 | if ($_[1] eq ",") { |
1384 | if ($_[1] eq ",") { |
1088 | $cb->($_[0], $string); |
1385 | $cb->($_[0], $string); |
1089 | } else { |
1386 | } else { |
1090 | $self->_error (&Errno::EBADMSG); |
1387 | $self->_error (Errno::EBADMSG); |
1091 | } |
1388 | } |
1092 | }); |
1389 | }); |
1093 | }); |
1390 | }); |
1094 | |
1391 | |
1095 | 1 |
1392 | 1 |
… | |
… | |
1142 | } |
1439 | } |
1143 | }; |
1440 | }; |
1144 | |
1441 | |
1145 | =item json => $cb->($handle, $hash_or_arrayref) |
1442 | =item json => $cb->($handle, $hash_or_arrayref) |
1146 | |
1443 | |
1147 | Reads a JSON object or array, decodes it and passes it to the callback. |
1444 | Reads a JSON object or array, decodes it and passes it to the |
|
|
1445 | callback. When a parse error occurs, an C<EBADMSG> error will be raised. |
1148 | |
1446 | |
1149 | If a C<json> object was passed to the constructor, then that will be used |
1447 | If a C<json> object was passed to the constructor, then that will be used |
1150 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
1448 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
1151 | |
1449 | |
1152 | This read type uses the incremental parser available with JSON version |
1450 | This read type uses the incremental parser available with JSON version |
… | |
… | |
1161 | =cut |
1459 | =cut |
1162 | |
1460 | |
1163 | register_read_type json => sub { |
1461 | register_read_type json => sub { |
1164 | my ($self, $cb) = @_; |
1462 | my ($self, $cb) = @_; |
1165 | |
1463 | |
1166 | require JSON; |
1464 | my $json = $self->{json} ||= |
|
|
1465 | eval { require JSON::XS; JSON::XS->new->utf8 } |
|
|
1466 | || do { require JSON; JSON->new->utf8 }; |
1167 | |
1467 | |
1168 | my $data; |
1468 | my $data; |
1169 | my $rbuf = \$self->{rbuf}; |
1469 | my $rbuf = \$self->{rbuf}; |
1170 | |
1470 | |
1171 | my $json = $self->{json} ||= JSON->new->utf8; |
|
|
1172 | |
|
|
1173 | sub { |
1471 | sub { |
1174 | my $ref = $json->incr_parse ($self->{rbuf}); |
1472 | my $ref = eval { $json->incr_parse ($self->{rbuf}) }; |
1175 | |
1473 | |
1176 | if ($ref) { |
1474 | if ($ref) { |
1177 | $self->{rbuf} = $json->incr_text; |
1475 | $self->{rbuf} = $json->incr_text; |
1178 | $json->incr_text = ""; |
1476 | $json->incr_text = ""; |
1179 | $cb->($self, $ref); |
1477 | $cb->($self, $ref); |
1180 | |
1478 | |
1181 | 1 |
1479 | 1 |
|
|
1480 | } elsif ($@) { |
|
|
1481 | # error case |
|
|
1482 | $json->incr_skip; |
|
|
1483 | |
|
|
1484 | $self->{rbuf} = $json->incr_text; |
|
|
1485 | $json->incr_text = ""; |
|
|
1486 | |
|
|
1487 | $self->_error (Errno::EBADMSG); |
|
|
1488 | |
|
|
1489 | () |
1182 | } else { |
1490 | } else { |
1183 | $self->{rbuf} = ""; |
1491 | $self->{rbuf} = ""; |
|
|
1492 | |
1184 | () |
1493 | () |
1185 | } |
1494 | } |
1186 | } |
1495 | } |
1187 | }; |
1496 | }; |
1188 | |
1497 | |
… | |
… | |
1220 | # read remaining chunk |
1529 | # read remaining chunk |
1221 | $_[0]->unshift_read (chunk => $len, sub { |
1530 | $_[0]->unshift_read (chunk => $len, sub { |
1222 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1531 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1223 | $cb->($_[0], $ref); |
1532 | $cb->($_[0], $ref); |
1224 | } else { |
1533 | } else { |
1225 | $self->_error (&Errno::EBADMSG); |
1534 | $self->_error (Errno::EBADMSG); |
1226 | } |
1535 | } |
1227 | }); |
1536 | }); |
1228 | } |
1537 | } |
1229 | |
1538 | |
1230 | 1 |
1539 | 1 |
… | |
… | |
1282 | my ($self) = @_; |
1591 | my ($self) = @_; |
1283 | |
1592 | |
1284 | unless ($self->{_rw} || $self->{_eof}) { |
1593 | unless ($self->{_rw} || $self->{_eof}) { |
1285 | Scalar::Util::weaken $self; |
1594 | Scalar::Util::weaken $self; |
1286 | |
1595 | |
1287 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
1596 | $self->{_rw} = AE::io $self->{fh}, 0, sub { |
1288 | my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf}); |
1597 | my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf}); |
1289 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
1598 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
1290 | |
1599 | |
1291 | if ($len > 0) { |
1600 | if ($len > 0) { |
1292 | $self->{_activity} = AnyEvent->now; |
1601 | $self->{_activity} = $self->{_ractivity} = AE::now; |
1293 | |
1602 | |
1294 | if ($self->{tls}) { |
1603 | if ($self->{tls}) { |
1295 | Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf); |
1604 | Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf); |
|
|
1605 | |
1296 | &_dotls ($self); |
1606 | &_dotls ($self); |
1297 | } else { |
1607 | } else { |
1298 | $self->_drain_rbuf unless $self->{_in_drain}; |
1608 | $self->_drain_rbuf; |
1299 | } |
1609 | } |
1300 | |
1610 | |
1301 | } elsif (defined $len) { |
1611 | } elsif (defined $len) { |
1302 | delete $self->{_rw}; |
1612 | delete $self->{_rw}; |
1303 | $self->{_eof} = 1; |
1613 | $self->{_eof} = 1; |
1304 | $self->_drain_rbuf unless $self->{_in_drain}; |
1614 | $self->_drain_rbuf; |
1305 | |
1615 | |
1306 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
1616 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
1307 | return $self->_error ($!, 1); |
1617 | return $self->_error ($!, 1); |
1308 | } |
1618 | } |
1309 | }); |
1619 | }; |
1310 | } |
1620 | } |
1311 | } |
1621 | } |
1312 | |
1622 | |
|
|
1623 | our $ERROR_SYSCALL; |
|
|
1624 | our $ERROR_WANT_READ; |
|
|
1625 | |
|
|
1626 | sub _tls_error { |
|
|
1627 | my ($self, $err) = @_; |
|
|
1628 | |
|
|
1629 | return $self->_error ($!, 1) |
|
|
1630 | if $err == Net::SSLeay::ERROR_SYSCALL (); |
|
|
1631 | |
|
|
1632 | my $err =Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ()); |
|
|
1633 | |
|
|
1634 | # reduce error string to look less scary |
|
|
1635 | $err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /; |
|
|
1636 | |
|
|
1637 | if ($self->{_on_starttls}) { |
|
|
1638 | (delete $self->{_on_starttls})->($self, undef, $err); |
|
|
1639 | &_freetls; |
|
|
1640 | } else { |
|
|
1641 | &_freetls; |
|
|
1642 | $self->_error (Errno::EPROTO, 1, $err); |
|
|
1643 | } |
|
|
1644 | } |
|
|
1645 | |
|
|
1646 | # poll the write BIO and send the data if applicable |
|
|
1647 | # also decode read data if possible |
|
|
1648 | # this is basiclaly our TLS state machine |
|
|
1649 | # more efficient implementations are possible with openssl, |
|
|
1650 | # but not with the buggy and incomplete Net::SSLeay. |
1313 | sub _dotls { |
1651 | sub _dotls { |
1314 | my ($self) = @_; |
1652 | my ($self) = @_; |
1315 | |
1653 | |
1316 | my $buf; |
1654 | my $tmp; |
1317 | |
1655 | |
1318 | if (length $self->{_tls_wbuf}) { |
1656 | if (length $self->{_tls_wbuf}) { |
1319 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1657 | while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1320 | substr $self->{_tls_wbuf}, 0, $len, ""; |
1658 | substr $self->{_tls_wbuf}, 0, $tmp, ""; |
1321 | } |
1659 | } |
1322 | } |
|
|
1323 | |
1660 | |
|
|
1661 | $tmp = Net::SSLeay::get_error ($self->{tls}, $tmp); |
|
|
1662 | return $self->_tls_error ($tmp) |
|
|
1663 | if $tmp != $ERROR_WANT_READ |
|
|
1664 | && ($tmp != $ERROR_SYSCALL || $!); |
|
|
1665 | } |
|
|
1666 | |
1324 | while (defined ($buf = Net::SSLeay::read ($self->{tls}))) { |
1667 | while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) { |
1325 | unless (length $buf) { |
1668 | unless (length $tmp) { |
1326 | # let's treat SSL-eof as we treat normal EOF |
1669 | $self->{_on_starttls} |
1327 | delete $self->{_rw}; |
1670 | and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ??? |
1328 | $self->{_eof} = 1; |
|
|
1329 | &_freetls; |
1671 | &_freetls; |
|
|
1672 | |
|
|
1673 | if ($self->{on_stoptls}) { |
|
|
1674 | $self->{on_stoptls}($self); |
|
|
1675 | return; |
|
|
1676 | } else { |
|
|
1677 | # let's treat SSL-eof as we treat normal EOF |
|
|
1678 | delete $self->{_rw}; |
|
|
1679 | $self->{_eof} = 1; |
|
|
1680 | } |
1330 | } |
1681 | } |
1331 | |
1682 | |
1332 | $self->{rbuf} .= $buf; |
1683 | $self->{_tls_rbuf} .= $tmp; |
1333 | $self->_drain_rbuf unless $self->{_in_drain}; |
1684 | $self->_drain_rbuf; |
1334 | $self->{tls} or return; # tls session might have gone away in callback |
1685 | $self->{tls} or return; # tls session might have gone away in callback |
1335 | } |
1686 | } |
1336 | |
1687 | |
1337 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
1688 | $tmp = Net::SSLeay::get_error ($self->{tls}, -1); |
1338 | |
|
|
1339 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
|
|
1340 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
|
|
1341 | return $self->_error ($!, 1); |
1689 | return $self->_tls_error ($tmp) |
1342 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
1690 | if $tmp != $ERROR_WANT_READ |
1343 | return $self->_error (&Errno::EIO, 1); |
1691 | && ($tmp != $ERROR_SYSCALL || $!); |
1344 | } |
|
|
1345 | |
1692 | |
1346 | # all others are fine for our purposes |
|
|
1347 | } |
|
|
1348 | |
|
|
1349 | while (length ($buf = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1693 | while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1350 | $self->{wbuf} .= $buf; |
1694 | $self->{wbuf} .= $tmp; |
1351 | $self->_drain_wbuf; |
1695 | $self->_drain_wbuf; |
1352 | } |
1696 | } |
|
|
1697 | |
|
|
1698 | $self->{_on_starttls} |
|
|
1699 | and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK () |
|
|
1700 | and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established"); |
1353 | } |
1701 | } |
1354 | |
1702 | |
1355 | =item $handle->starttls ($tls[, $tls_ctx]) |
1703 | =item $handle->starttls ($tls[, $tls_ctx]) |
1356 | |
1704 | |
1357 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
1705 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
1358 | object is created, you can also do that at a later time by calling |
1706 | object is created, you can also do that at a later time by calling |
1359 | C<starttls>. |
1707 | C<starttls>. |
1360 | |
1708 | |
|
|
1709 | Starting TLS is currently an asynchronous operation - when you push some |
|
|
1710 | write data and then call C<< ->starttls >> then TLS negotiation will start |
|
|
1711 | immediately, after which the queued write data is then sent. |
|
|
1712 | |
1361 | The first argument is the same as the C<tls> constructor argument (either |
1713 | The first argument is the same as the C<tls> constructor argument (either |
1362 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
1714 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
1363 | |
1715 | |
1364 | The second argument is the optional C<Net::SSLeay::CTX> object that is |
1716 | The second argument is the optional C<AnyEvent::TLS> object that is used |
1365 | used when AnyEvent::Handle has to create its own TLS connection object. |
1717 | when AnyEvent::Handle has to create its own TLS connection object, or |
|
|
1718 | a hash reference with C<< key => value >> pairs that will be used to |
|
|
1719 | construct a new context. |
1366 | |
1720 | |
1367 | The TLS connection object will end up in C<< $handle->{tls} >> after this |
1721 | The TLS connection object will end up in C<< $handle->{tls} >>, the TLS |
1368 | call and can be used or changed to your liking. Note that the handshake |
1722 | context in C<< $handle->{tls_ctx} >> after this call and can be used or |
1369 | might have already started when this function returns. |
1723 | changed to your liking. Note that the handshake might have already started |
|
|
1724 | when this function returns. |
1370 | |
1725 | |
1371 | If it an error to start a TLS handshake more than once per |
1726 | Due to bugs in OpenSSL, it might or might not be possible to do multiple |
1372 | AnyEvent::Handle object (this is due to bugs in OpenSSL). |
1727 | handshakes on the same stream. Best do not attempt to use the stream after |
|
|
1728 | stopping TLS. |
1373 | |
1729 | |
1374 | =cut |
1730 | =cut |
|
|
1731 | |
|
|
1732 | our %TLS_CACHE; #TODO not yet documented, should we? |
1375 | |
1733 | |
1376 | sub starttls { |
1734 | sub starttls { |
1377 | my ($self, $ssl, $ctx) = @_; |
1735 | my ($self, $tls, $ctx) = @_; |
|
|
1736 | |
|
|
1737 | Carp::croak "It is an error to call starttls on an AnyEvent::Handle object while TLS is already active, caught" |
|
|
1738 | if $self->{tls}; |
|
|
1739 | |
|
|
1740 | $self->{tls} = $tls; |
|
|
1741 | $self->{tls_ctx} = $ctx if @_ > 2; |
|
|
1742 | |
|
|
1743 | return unless $self->{fh}; |
1378 | |
1744 | |
1379 | require Net::SSLeay; |
1745 | require Net::SSLeay; |
1380 | |
1746 | |
1381 | Carp::croak "it is an error to call starttls more than once on an Anyevent::Handle object" |
1747 | $ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL (); |
|
|
1748 | $ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ (); |
|
|
1749 | |
1382 | if $self->{tls}; |
1750 | $tls = $self->{tls}; |
|
|
1751 | $ctx = $self->{tls_ctx}; |
|
|
1752 | |
|
|
1753 | local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session |
|
|
1754 | |
|
|
1755 | if ("HASH" eq ref $ctx) { |
|
|
1756 | require AnyEvent::TLS; |
|
|
1757 | |
|
|
1758 | if ($ctx->{cache}) { |
|
|
1759 | my $key = $ctx+0; |
|
|
1760 | $ctx = $TLS_CACHE{$key} ||= new AnyEvent::TLS %$ctx; |
|
|
1761 | } else { |
|
|
1762 | $ctx = new AnyEvent::TLS %$ctx; |
|
|
1763 | } |
|
|
1764 | } |
1383 | |
1765 | |
1384 | if ($ssl eq "accept") { |
1766 | $self->{tls_ctx} = $ctx || TLS_CTX (); |
1385 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
1767 | $self->{tls} = $tls = $self->{tls_ctx}->_get_session ($tls, $self, $self->{peername}); |
1386 | Net::SSLeay::set_accept_state ($ssl); |
|
|
1387 | } elsif ($ssl eq "connect") { |
|
|
1388 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
|
|
1389 | Net::SSLeay::set_connect_state ($ssl); |
|
|
1390 | } |
|
|
1391 | |
|
|
1392 | $self->{tls} = $ssl; |
|
|
1393 | |
1768 | |
1394 | # basically, this is deep magic (because SSL_read should have the same issues) |
1769 | # basically, this is deep magic (because SSL_read should have the same issues) |
1395 | # but the openssl maintainers basically said: "trust us, it just works". |
1770 | # but the openssl maintainers basically said: "trust us, it just works". |
1396 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
1771 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
1397 | # and mismaintained ssleay-module doesn't even offer them). |
1772 | # and mismaintained ssleay-module doesn't even offer them). |
… | |
… | |
1401 | # |
1776 | # |
1402 | # note that we do not try to keep the length constant between writes as we are required to do. |
1777 | # note that we do not try to keep the length constant between writes as we are required to do. |
1403 | # we assume that most (but not all) of this insanity only applies to non-blocking cases, |
1778 | # we assume that most (but not all) of this insanity only applies to non-blocking cases, |
1404 | # and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to |
1779 | # and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to |
1405 | # have identity issues in that area. |
1780 | # have identity issues in that area. |
1406 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
1781 | # Net::SSLeay::CTX_set_mode ($ssl, |
1407 | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
1782 | # (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
1408 | | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
1783 | # | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
|
|
1784 | Net::SSLeay::CTX_set_mode ($tls, 1|2); |
1409 | |
1785 | |
1410 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1786 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1411 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1787 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1412 | |
1788 | |
|
|
1789 | Net::SSLeay::BIO_write ($self->{_rbio}, delete $self->{rbuf}); |
|
|
1790 | |
1413 | Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio}); |
1791 | Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio}); |
|
|
1792 | |
|
|
1793 | $self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) } |
|
|
1794 | if $self->{on_starttls}; |
1414 | |
1795 | |
1415 | &_dotls; # need to trigger the initial handshake |
1796 | &_dotls; # need to trigger the initial handshake |
1416 | $self->start_read; # make sure we actually do read |
1797 | $self->start_read; # make sure we actually do read |
1417 | } |
1798 | } |
1418 | |
1799 | |
1419 | =item $handle->stoptls |
1800 | =item $handle->stoptls |
1420 | |
1801 | |
1421 | Shuts down the SSL connection - this makes a proper EOF handshake by |
1802 | Shuts down the SSL connection - this makes a proper EOF handshake by |
1422 | sending a close notify to the other side, but since OpenSSL doesn't |
1803 | sending a close notify to the other side, but since OpenSSL doesn't |
1423 | support non-blocking shut downs, it is not possible to re-use the stream |
1804 | support non-blocking shut downs, it is not guarenteed that you can re-use |
1424 | afterwards. |
1805 | the stream afterwards. |
1425 | |
1806 | |
1426 | =cut |
1807 | =cut |
1427 | |
1808 | |
1428 | sub stoptls { |
1809 | sub stoptls { |
1429 | my ($self) = @_; |
1810 | my ($self) = @_; |
… | |
… | |
1431 | if ($self->{tls}) { |
1812 | if ($self->{tls}) { |
1432 | Net::SSLeay::shutdown ($self->{tls}); |
1813 | Net::SSLeay::shutdown ($self->{tls}); |
1433 | |
1814 | |
1434 | &_dotls; |
1815 | &_dotls; |
1435 | |
1816 | |
1436 | # we don't give a shit. no, we do, but we can't. no... |
1817 | # # we don't give a shit. no, we do, but we can't. no...#d# |
1437 | # we, we... have to use openssl :/ |
1818 | # # we, we... have to use openssl :/#d# |
1438 | &_freetls; |
1819 | # &_freetls;#d# |
1439 | } |
1820 | } |
1440 | } |
1821 | } |
1441 | |
1822 | |
1442 | sub _freetls { |
1823 | sub _freetls { |
1443 | my ($self) = @_; |
1824 | my ($self) = @_; |
1444 | |
1825 | |
1445 | return unless $self->{tls}; |
1826 | return unless $self->{tls}; |
1446 | |
1827 | |
1447 | Net::SSLeay::free (delete $self->{tls}); |
1828 | $self->{tls_ctx}->_put_session (delete $self->{tls}) |
|
|
1829 | if $self->{tls} > 0; |
1448 | |
1830 | |
1449 | delete @$self{qw(_rbio _wbio _tls_wbuf)}; |
1831 | delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)}; |
1450 | } |
1832 | } |
1451 | |
1833 | |
1452 | sub DESTROY { |
1834 | sub DESTROY { |
1453 | my $self = shift; |
1835 | my ($self) = @_; |
1454 | |
1836 | |
1455 | &_freetls; |
1837 | &_freetls; |
1456 | |
1838 | |
1457 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
1839 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
1458 | |
1840 | |
1459 | if ($linger && length $self->{wbuf}) { |
1841 | if ($linger && length $self->{wbuf} && $self->{fh}) { |
1460 | my $fh = delete $self->{fh}; |
1842 | my $fh = delete $self->{fh}; |
1461 | my $wbuf = delete $self->{wbuf}; |
1843 | my $wbuf = delete $self->{wbuf}; |
1462 | |
1844 | |
1463 | my @linger; |
1845 | my @linger; |
1464 | |
1846 | |
1465 | push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub { |
1847 | push @linger, AE::io $fh, 1, sub { |
1466 | my $len = syswrite $fh, $wbuf, length $wbuf; |
1848 | my $len = syswrite $fh, $wbuf, length $wbuf; |
1467 | |
1849 | |
1468 | if ($len > 0) { |
1850 | if ($len > 0) { |
1469 | substr $wbuf, 0, $len, ""; |
1851 | substr $wbuf, 0, $len, ""; |
1470 | } else { |
1852 | } else { |
1471 | @linger = (); # end |
1853 | @linger = (); # end |
1472 | } |
1854 | } |
1473 | }); |
1855 | }; |
1474 | push @linger, AnyEvent->timer (after => $linger, cb => sub { |
1856 | push @linger, AE::timer $linger, 0, sub { |
1475 | @linger = (); |
1857 | @linger = (); |
1476 | }); |
1858 | }; |
1477 | } |
1859 | } |
|
|
1860 | } |
|
|
1861 | |
|
|
1862 | =item $handle->destroy |
|
|
1863 | |
|
|
1864 | Shuts down the handle object as much as possible - this call ensures that |
|
|
1865 | no further callbacks will be invoked and as many resources as possible |
|
|
1866 | will be freed. Any method you will call on the handle object after |
|
|
1867 | destroying it in this way will be silently ignored (and it will return the |
|
|
1868 | empty list). |
|
|
1869 | |
|
|
1870 | Normally, you can just "forget" any references to an AnyEvent::Handle |
|
|
1871 | object and it will simply shut down. This works in fatal error and EOF |
|
|
1872 | callbacks, as well as code outside. It does I<NOT> work in a read or write |
|
|
1873 | callback, so when you want to destroy the AnyEvent::Handle object from |
|
|
1874 | within such an callback. You I<MUST> call C<< ->destroy >> explicitly in |
|
|
1875 | that case. |
|
|
1876 | |
|
|
1877 | Destroying the handle object in this way has the advantage that callbacks |
|
|
1878 | will be removed as well, so if those are the only reference holders (as |
|
|
1879 | is common), then one doesn't need to do anything special to break any |
|
|
1880 | reference cycles. |
|
|
1881 | |
|
|
1882 | The handle might still linger in the background and write out remaining |
|
|
1883 | data, as specified by the C<linger> option, however. |
|
|
1884 | |
|
|
1885 | =cut |
|
|
1886 | |
|
|
1887 | sub destroy { |
|
|
1888 | my ($self) = @_; |
|
|
1889 | |
|
|
1890 | $self->DESTROY; |
|
|
1891 | %$self = (); |
|
|
1892 | bless $self, "AnyEvent::Handle::destroyed"; |
|
|
1893 | } |
|
|
1894 | |
|
|
1895 | sub AnyEvent::Handle::destroyed::AUTOLOAD { |
|
|
1896 | #nop |
1478 | } |
1897 | } |
1479 | |
1898 | |
1480 | =item AnyEvent::Handle::TLS_CTX |
1899 | =item AnyEvent::Handle::TLS_CTX |
1481 | |
1900 | |
1482 | This function creates and returns the Net::SSLeay::CTX object used by |
1901 | This function creates and returns the AnyEvent::TLS object used by default |
1483 | default for TLS mode. |
1902 | for TLS mode. |
1484 | |
1903 | |
1485 | The context is created like this: |
1904 | The context is created by calling L<AnyEvent::TLS> without any arguments. |
1486 | |
|
|
1487 | Net::SSLeay::load_error_strings; |
|
|
1488 | Net::SSLeay::SSLeay_add_ssl_algorithms; |
|
|
1489 | Net::SSLeay::randomize; |
|
|
1490 | |
|
|
1491 | my $CTX = Net::SSLeay::CTX_new; |
|
|
1492 | |
|
|
1493 | Net::SSLeay::CTX_set_options $CTX, Net::SSLeay::OP_ALL |
|
|
1494 | |
1905 | |
1495 | =cut |
1906 | =cut |
1496 | |
1907 | |
1497 | our $TLS_CTX; |
1908 | our $TLS_CTX; |
1498 | |
1909 | |
1499 | sub TLS_CTX() { |
1910 | sub TLS_CTX() { |
1500 | $TLS_CTX || do { |
1911 | $TLS_CTX ||= do { |
1501 | require Net::SSLeay; |
1912 | require AnyEvent::TLS; |
1502 | |
1913 | |
1503 | Net::SSLeay::load_error_strings (); |
1914 | new AnyEvent::TLS |
1504 | Net::SSLeay::SSLeay_add_ssl_algorithms (); |
|
|
1505 | Net::SSLeay::randomize (); |
|
|
1506 | |
|
|
1507 | $TLS_CTX = Net::SSLeay::CTX_new (); |
|
|
1508 | |
|
|
1509 | Net::SSLeay::CTX_set_options ($TLS_CTX, Net::SSLeay::OP_ALL ()); |
|
|
1510 | |
|
|
1511 | $TLS_CTX |
|
|
1512 | } |
1915 | } |
1513 | } |
1916 | } |
1514 | |
1917 | |
1515 | =back |
1918 | =back |
1516 | |
1919 | |
1517 | |
1920 | |
1518 | =head1 NONFREQUENTLY ASKED QUESTIONS |
1921 | =head1 NONFREQUENTLY ASKED QUESTIONS |
1519 | |
1922 | |
1520 | =over 4 |
1923 | =over 4 |
|
|
1924 | |
|
|
1925 | =item I C<undef> the AnyEvent::Handle reference inside my callback and |
|
|
1926 | still get further invocations! |
|
|
1927 | |
|
|
1928 | That's because AnyEvent::Handle keeps a reference to itself when handling |
|
|
1929 | read or write callbacks. |
|
|
1930 | |
|
|
1931 | It is only safe to "forget" the reference inside EOF or error callbacks, |
|
|
1932 | from within all other callbacks, you need to explicitly call the C<< |
|
|
1933 | ->destroy >> method. |
|
|
1934 | |
|
|
1935 | =item I get different callback invocations in TLS mode/Why can't I pause |
|
|
1936 | reading? |
|
|
1937 | |
|
|
1938 | Unlike, say, TCP, TLS connections do not consist of two independent |
|
|
1939 | communication channels, one for each direction. Or put differently. The |
|
|
1940 | read and write directions are not independent of each other: you cannot |
|
|
1941 | write data unless you are also prepared to read, and vice versa. |
|
|
1942 | |
|
|
1943 | This can mean than, in TLS mode, you might get C<on_error> or C<on_eof> |
|
|
1944 | callback invocations when you are not expecting any read data - the reason |
|
|
1945 | is that AnyEvent::Handle always reads in TLS mode. |
|
|
1946 | |
|
|
1947 | During the connection, you have to make sure that you always have a |
|
|
1948 | non-empty read-queue, or an C<on_read> watcher. At the end of the |
|
|
1949 | connection (or when you no longer want to use it) you can call the |
|
|
1950 | C<destroy> method. |
1521 | |
1951 | |
1522 | =item How do I read data until the other side closes the connection? |
1952 | =item How do I read data until the other side closes the connection? |
1523 | |
1953 | |
1524 | If you just want to read your data into a perl scalar, the easiest way |
1954 | If you just want to read your data into a perl scalar, the easiest way |
1525 | to achieve this is by setting an C<on_read> callback that does nothing, |
1955 | to achieve this is by setting an C<on_read> callback that does nothing, |
… | |
… | |
1528 | |
1958 | |
1529 | $handle->on_read (sub { }); |
1959 | $handle->on_read (sub { }); |
1530 | $handle->on_eof (undef); |
1960 | $handle->on_eof (undef); |
1531 | $handle->on_error (sub { |
1961 | $handle->on_error (sub { |
1532 | my $data = delete $_[0]{rbuf}; |
1962 | my $data = delete $_[0]{rbuf}; |
1533 | undef $handle; |
|
|
1534 | }); |
1963 | }); |
1535 | |
1964 | |
1536 | The reason to use C<on_error> is that TCP connections, due to latencies |
1965 | The reason to use C<on_error> is that TCP connections, due to latencies |
1537 | and packets loss, might get closed quite violently with an error, when in |
1966 | and packets loss, might get closed quite violently with an error, when in |
1538 | fact, all data has been received. |
1967 | fact, all data has been received. |
1539 | |
1968 | |
1540 | It is usually better to use acknowledgements when transfering data, |
1969 | It is usually better to use acknowledgements when transferring data, |
1541 | to make sure the other side hasn't just died and you got the data |
1970 | to make sure the other side hasn't just died and you got the data |
1542 | intact. This is also one reason why so many internet protocols have an |
1971 | intact. This is also one reason why so many internet protocols have an |
1543 | explicit QUIT command. |
1972 | explicit QUIT command. |
1544 | |
|
|
1545 | |
1973 | |
1546 | =item I don't want to destroy the handle too early - how do I wait until |
1974 | =item I don't want to destroy the handle too early - how do I wait until |
1547 | all data has been written? |
1975 | all data has been written? |
1548 | |
1976 | |
1549 | After writing your last bits of data, set the C<on_drain> callback |
1977 | After writing your last bits of data, set the C<on_drain> callback |
… | |
… | |
1555 | $handle->on_drain (sub { |
1983 | $handle->on_drain (sub { |
1556 | warn "all data submitted to the kernel\n"; |
1984 | warn "all data submitted to the kernel\n"; |
1557 | undef $handle; |
1985 | undef $handle; |
1558 | }); |
1986 | }); |
1559 | |
1987 | |
|
|
1988 | If you just want to queue some data and then signal EOF to the other side, |
|
|
1989 | consider using C<< ->push_shutdown >> instead. |
|
|
1990 | |
|
|
1991 | =item I want to contact a TLS/SSL server, I don't care about security. |
|
|
1992 | |
|
|
1993 | If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS, |
|
|
1994 | simply connect to it and then create the AnyEvent::Handle with the C<tls> |
|
|
1995 | parameter: |
|
|
1996 | |
|
|
1997 | tcp_connect $host, $port, sub { |
|
|
1998 | my ($fh) = @_; |
|
|
1999 | |
|
|
2000 | my $handle = new AnyEvent::Handle |
|
|
2001 | fh => $fh, |
|
|
2002 | tls => "connect", |
|
|
2003 | on_error => sub { ... }; |
|
|
2004 | |
|
|
2005 | $handle->push_write (...); |
|
|
2006 | }; |
|
|
2007 | |
|
|
2008 | =item I want to contact a TLS/SSL server, I do care about security. |
|
|
2009 | |
|
|
2010 | Then you should additionally enable certificate verification, including |
|
|
2011 | peername verification, if the protocol you use supports it (see |
|
|
2012 | L<AnyEvent::TLS>, C<verify_peername>). |
|
|
2013 | |
|
|
2014 | E.g. for HTTPS: |
|
|
2015 | |
|
|
2016 | tcp_connect $host, $port, sub { |
|
|
2017 | my ($fh) = @_; |
|
|
2018 | |
|
|
2019 | my $handle = new AnyEvent::Handle |
|
|
2020 | fh => $fh, |
|
|
2021 | peername => $host, |
|
|
2022 | tls => "connect", |
|
|
2023 | tls_ctx => { verify => 1, verify_peername => "https" }, |
|
|
2024 | ... |
|
|
2025 | |
|
|
2026 | Note that you must specify the hostname you connected to (or whatever |
|
|
2027 | "peername" the protocol needs) as the C<peername> argument, otherwise no |
|
|
2028 | peername verification will be done. |
|
|
2029 | |
|
|
2030 | The above will use the system-dependent default set of trusted CA |
|
|
2031 | certificates. If you want to check against a specific CA, add the |
|
|
2032 | C<ca_file> (or C<ca_cert>) arguments to C<tls_ctx>: |
|
|
2033 | |
|
|
2034 | tls_ctx => { |
|
|
2035 | verify => 1, |
|
|
2036 | verify_peername => "https", |
|
|
2037 | ca_file => "my-ca-cert.pem", |
|
|
2038 | }, |
|
|
2039 | |
|
|
2040 | =item I want to create a TLS/SSL server, how do I do that? |
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2041 | |
|
|
2042 | Well, you first need to get a server certificate and key. You have |
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2043 | three options: a) ask a CA (buy one, use cacert.org etc.) b) create a |
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2044 | self-signed certificate (cheap. check the search engine of your choice, |
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2045 | there are many tutorials on the net) or c) make your own CA (tinyca2 is a |
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2046 | nice program for that purpose). |
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2047 | |
|
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2048 | Then create a file with your private key (in PEM format, see |
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2049 | L<AnyEvent::TLS>), followed by the certificate (also in PEM format). The |
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2050 | file should then look like this: |
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2051 | |
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2052 | -----BEGIN RSA PRIVATE KEY----- |
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2053 | ...header data |
|
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2054 | ... lots of base64'y-stuff |
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2055 | -----END RSA PRIVATE KEY----- |
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2056 | |
|
|
2057 | -----BEGIN CERTIFICATE----- |
|
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2058 | ... lots of base64'y-stuff |
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2059 | -----END CERTIFICATE----- |
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2060 | |
|
|
2061 | The important bits are the "PRIVATE KEY" and "CERTIFICATE" parts. Then |
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2062 | specify this file as C<cert_file>: |
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2063 | |
|
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2064 | tcp_server undef, $port, sub { |
|
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2065 | my ($fh) = @_; |
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2066 | |
|
|
2067 | my $handle = new AnyEvent::Handle |
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2068 | fh => $fh, |
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2069 | tls => "accept", |
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2070 | tls_ctx => { cert_file => "my-server-keycert.pem" }, |
|
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2071 | ... |
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2072 | |
|
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2073 | When you have intermediate CA certificates that your clients might not |
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2074 | know about, just append them to the C<cert_file>. |
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2075 | |
1560 | =back |
2076 | =back |
1561 | |
2077 | |
1562 | |
2078 | |
1563 | =head1 SUBCLASSING AnyEvent::Handle |
2079 | =head1 SUBCLASSING AnyEvent::Handle |
1564 | |
2080 | |