1 | package AnyEvent::Handle; |
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2 | |
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3 | no warnings; |
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4 | use strict; |
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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 = 4.22; |
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>. |
41 | |
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42 | The L<AnyEvent::Intro> tutorial contains some well-documented |
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43 | AnyEvent::Handle examples. |
53 | |
44 | |
54 | 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 |
55 | 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 |
56 | treatment of characters applies to this module as well. |
47 | treatment of characters applies to this module as well. |
57 | |
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 | |
58 | 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 |
59 | argument. |
53 | argument. |
60 | |
54 | |
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55 | =cut |
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56 | |
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57 | package AnyEvent::Handle; |
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58 | |
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59 | use Scalar::Util (); |
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60 | use List::Util (); |
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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); |
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66 | |
61 | =head1 METHODS |
67 | =head1 METHODS |
62 | |
68 | |
63 | =over 4 |
69 | =over 4 |
64 | |
70 | |
65 | =item B<new (%args)> |
71 | =item $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value... |
66 | |
72 | |
67 | The constructor supports these arguments (all as key => value pairs). |
73 | The constructor supports these arguments (all as C<< key => value >> pairs). |
68 | |
74 | |
69 | =over 4 |
75 | =over 4 |
70 | |
76 | |
71 | =item fh => $filehandle [MANDATORY] |
77 | =item fh => $filehandle [C<fh> or C<connect> MANDATORY] |
72 | |
78 | |
73 | The filehandle this L<AnyEvent::Handle> object will operate on. |
79 | The filehandle this L<AnyEvent::Handle> object will operate on. |
74 | |
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75 | NOTE: The filehandle will be set to non-blocking (using |
80 | NOTE: The filehandle will be set to non-blocking mode (using |
76 | AnyEvent::Util::fh_nonblocking). |
81 | C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in |
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82 | that mode. |
77 | |
83 | |
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84 | =item connect => [$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 | |
78 | =item on_eof => $cb->($handle) |
101 | =item on_prepare => $cb->($handle) |
79 | |
102 | |
80 | 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 |
81 | 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 |
82 | 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). |
83 | |
108 | |
84 | While not mandatory, it is highly recommended to set an eof callback, |
109 | The return value of this callback should be the connect timeout value in |
85 | otherwise you might end up with a closed socket while you are still |
110 | seconds (or C<0>, or C<undef>, or the empty list, to indicate the default |
86 | waiting for data. |
111 | timeout is to be used). |
87 | |
112 | |
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113 | =item on_connect => $cb->($handle, $host, $port, $retry->()) |
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114 | |
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115 | This callback is called when a connection has been successfully established. |
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116 | |
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117 | The actual numeric host and port (the socket peername) are passed as |
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118 | parameters, together with a retry callback. |
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119 | |
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120 | When, for some reason, the handle is not acceptable, then calling |
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121 | C<$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 | |
88 | =item on_error => $cb->($handle, $fatal) |
139 | =item on_error => $cb->($handle, $fatal, $message) |
89 | |
140 | |
90 | This is the error callback, which is called when, well, some error |
141 | This is the error callback, which is called when, well, some error |
91 | occured, such as not being able to resolve the hostname, failure to |
142 | occured, such as not being able to resolve the hostname, failure to |
92 | connect or a read error. |
143 | connect or a read error. |
93 | |
144 | |
94 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
145 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
95 | fatal errors the handle object will be shut down and will not be |
146 | fatal errors the handle object will be destroyed (by a call to C<< -> |
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147 | destroy >>) after invoking the error callback (which means you are free to |
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148 | examine the handle object). Examples of fatal errors are an EOF condition |
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149 | with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors. In |
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150 | cases where the other side can close the connection at their will it is |
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151 | often easiest to not report C<EPIPE> errors in this callback. |
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152 | |
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153 | AnyEvent::Handle tries to find an appropriate error code for you to check |
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154 | against, but in some cases (TLS errors), this does not work well. It is |
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155 | recommended to always output the C<$message> argument in human-readable |
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156 | error messages (it's usually the same as C<"$!">). |
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157 | |
96 | usable. Non-fatal errors can be retried by simply returning, but it is |
158 | Non-fatal errors can be retried by simply returning, but it is recommended |
97 | recommended to simply ignore this parameter and instead abondon the handle |
159 | to simply ignore this parameter and instead abondon the handle object |
98 | object when this callback is invoked. |
160 | when this callback is invoked. Examples of non-fatal errors are timeouts |
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161 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
99 | |
162 | |
100 | On callback entrance, the value of C<$!> contains the operating system |
163 | On callback entrance, the value of C<$!> contains the operating system |
101 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
164 | error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or |
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165 | C<EPROTO>). |
102 | |
166 | |
103 | While not mandatory, it is I<highly> recommended to set this callback, as |
167 | While not mandatory, it is I<highly> recommended to set this callback, as |
104 | you will not be notified of errors otherwise. The default simply calls |
168 | you will not be notified of errors otherwise. The default simply calls |
105 | C<croak>. |
169 | C<croak>. |
106 | |
170 | |
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110 | and no read request is in the queue (unlike read queue callbacks, this |
174 | and no read request is in the queue (unlike read queue callbacks, this |
111 | callback will only be called when at least one octet of data is in the |
175 | callback will only be called when at least one octet of data is in the |
112 | read buffer). |
176 | read buffer). |
113 | |
177 | |
114 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
178 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
115 | method or access the C<$handle->{rbuf}> member directly. |
179 | method or access the C<< $handle->{rbuf} >> member directly. Note that you |
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180 | must not enlarge or modify the read buffer, you can only remove data at |
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181 | the beginning from it. |
116 | |
182 | |
117 | When an EOF condition is detected then AnyEvent::Handle will first try to |
183 | When an EOF condition is detected then AnyEvent::Handle will first try to |
118 | feed all the remaining data to the queued callbacks and C<on_read> before |
184 | feed all the remaining data to the queued callbacks and C<on_read> before |
119 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
185 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
120 | error will be raised (with C<$!> 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>. |
121 | |
208 | |
122 | =item on_drain => $cb->($handle) |
209 | =item on_drain => $cb->($handle) |
123 | |
210 | |
124 | 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 |
125 | (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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132 | 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 |
133 | the file when the write queue becomes empty. |
220 | the file when the write queue becomes empty. |
134 | |
221 | |
135 | =item timeout => $fractional_seconds |
222 | =item timeout => $fractional_seconds |
136 | |
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 | |
137 | If non-zero, then this enables an "inactivity" timeout: whenever this many |
228 | If non-zero, then these enables an "inactivity" timeout: whenever this |
138 | 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 |
139 | 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 |
140 | missing, an 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>. |
141 | |
239 | |
142 | 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 |
143 | 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 |
144 | 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 |
145 | in the C<on_timeout> callback. |
243 | in the C<on_timeout> callback, in which case AnyEvent::Handle will simply |
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244 | restart the timeout. |
146 | |
245 | |
147 | Zero (the default) disables this timeout. |
246 | Zero (the default) disables this timeout. |
148 | |
247 | |
149 | =item on_timeout => $cb->($handle) |
248 | =item on_timeout => $cb->($handle) |
150 | |
249 | |
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154 | |
253 | |
155 | =item rbuf_max => <bytes> |
254 | =item rbuf_max => <bytes> |
156 | |
255 | |
157 | If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>) |
256 | If defined, then a fatal error will be raised (with C<$!> set to C<ENOSPC>) |
158 | when the read buffer ever (strictly) exceeds this size. This is useful to |
257 | when the read buffer ever (strictly) exceeds this size. This is useful to |
159 | avoid denial-of-service attacks. |
258 | avoid some forms of denial-of-service attacks. |
160 | |
259 | |
161 | For example, a server accepting connections from untrusted sources should |
260 | For example, a server accepting connections from untrusted sources should |
162 | be configured to accept only so-and-so much data that it cannot act on |
261 | be configured to accept only so-and-so much data that it cannot act on |
163 | (for example, when expecting a line, an attacker could send an unlimited |
262 | (for example, when expecting a line, an attacker could send an unlimited |
164 | amount of data without a callback ever being called as long as the line |
263 | amount of data without a callback ever being called as long as the line |
165 | isn't finished). |
264 | isn't finished). |
166 | |
265 | |
167 | =item autocork => <boolean> |
266 | =item autocork => <boolean> |
168 | |
267 | |
169 | When disabled (the default), then C<push_write> will try to immediately |
268 | When disabled (the default), then C<push_write> will try to immediately |
170 | write the data to the handle if possible. This avoids having to register |
269 | write the data to the handle, if possible. This avoids having to register |
171 | a write watcher and wait for the next event loop iteration, but can be |
270 | a write watcher and wait for the next event loop iteration, but can |
172 | inefficient if you write multiple small chunks (this disadvantage is |
271 | be inefficient if you write multiple small chunks (on the wire, this |
173 | usually avoided by your kernel's nagle algorithm, see C<low_delay>). |
272 | disadvantage is usually avoided by your kernel's nagle algorithm, see |
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273 | C<no_delay>, but this option can save costly syscalls). |
174 | |
274 | |
175 | When enabled, then writes will always be queued till the next event loop |
275 | When enabled, then writes will always be queued till the next event loop |
176 | iteration. This is efficient when you do many small writes per iteration, |
276 | iteration. This is efficient when you do many small writes per iteration, |
177 | but less efficient when you do a single write only. |
277 | but less efficient when you do a single write only per iteration (or when |
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278 | the write buffer often is full). It also increases write latency. |
178 | |
279 | |
179 | =item no_delay => <boolean> |
280 | =item no_delay => <boolean> |
180 | |
281 | |
181 | When doing small writes on sockets, your operating system kernel might |
282 | When doing small writes on sockets, your operating system kernel might |
182 | wait a bit for more data before actually sending it out. This is called |
283 | wait a bit for more data before actually sending it out. This is called |
183 | the Nagle algorithm, and usually it is beneficial. |
284 | the Nagle algorithm, and usually it is beneficial. |
184 | |
285 | |
185 | In some situations you want as low a delay as possible, which cna be |
286 | In some situations you want as low a delay as possible, which can be |
186 | accomplishd by setting this option to true. |
287 | accomplishd by setting this option to a true value. |
187 | |
288 | |
188 | The default is your opertaing system's default behaviour, this option |
289 | The default is your opertaing system's default behaviour (most likely |
189 | explicitly enables or disables it, if possible. |
290 | enabled), this option explicitly enables or disables it, if possible. |
190 | |
291 | |
191 | =item read_size => <bytes> |
292 | =item read_size => <bytes> |
192 | |
293 | |
193 | The default read block size (the amount of bytes this module will try to read |
294 | The default read block size (the amount of bytes this module will |
194 | during each (loop iteration). Default: C<8192>. |
295 | try to read during each loop iteration, which affects memory |
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296 | requirements). Default: C<8192>. |
195 | |
297 | |
196 | =item low_water_mark => <bytes> |
298 | =item low_water_mark => <bytes> |
197 | |
299 | |
198 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
300 | Sets the amount of bytes (default: C<0>) that make up an "empty" write |
199 | buffer: If the write reaches this size or gets even samller it is |
301 | buffer: If the write reaches this size or gets even samller it is |
200 | considered empty. |
302 | considered empty. |
201 | |
303 | |
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304 | Sometimes it can be beneficial (for performance reasons) to add data to |
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305 | the write buffer before it is fully drained, but this is a rare case, as |
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306 | the operating system kernel usually buffers data as well, so the default |
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307 | is good in almost all cases. |
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308 | |
202 | =item linger => <seconds> |
309 | =item linger => <seconds> |
203 | |
310 | |
204 | If non-zero (default: C<3600>), then the destructor of the |
311 | If non-zero (default: C<3600>), then the destructor of the |
205 | AnyEvent::Handle object will check wether there is still outstanding write |
312 | AnyEvent::Handle object will check whether there is still outstanding |
206 | data and will install a watcher that will write out this data. No errors |
313 | write data and will install a watcher that will write this data to the |
207 | will be reported (this mostly matches how the operating system treats |
314 | socket. No errors will be reported (this mostly matches how the operating |
208 | outstanding data at socket close time). |
315 | system treats outstanding data at socket close time). |
209 | |
316 | |
210 | This will not work for partial TLS data that could not yet been |
317 | This will not work for partial TLS data that could not be encoded |
211 | encoded. This data will be lost. |
318 | yet. This data will be lost. Calling the C<stoptls> method in time might |
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319 | help. |
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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>. |
212 | |
330 | |
213 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
331 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
214 | |
332 | |
215 | When this parameter is given, it enables TLS (SSL) mode, that means it |
333 | When this parameter is given, it enables TLS (SSL) mode, that means |
216 | will start making tls handshake and will transparently encrypt/decrypt |
334 | AnyEvent will start a TLS handshake as soon as the conenction has been |
217 | data. |
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. |
218 | |
339 | |
219 | 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 |
220 | automatically when you try to create a TLS handle). |
341 | automatically when you try to create a TLS handle): this module doesn't |
|
|
342 | have a dependency on that module, so if your module requires it, you have |
|
|
343 | to add the dependency yourself. |
221 | |
344 | |
222 | For the TLS server side, use C<accept>, and for the TLS client side of a |
345 | Unlike TCP, TLS has a server and client side: for the TLS server side, use |
223 | connection, use C<connect> mode. |
346 | C<accept>, and for the TLS client side of a connection, use C<connect> |
|
|
347 | mode. |
224 | |
348 | |
225 | 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 |
226 | 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> |
227 | 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 |
228 | AnyEvent::Handle. |
352 | AnyEvent::Handle. Also, this module will take ownership of this connection |
|
|
353 | object. |
229 | |
354 | |
|
|
355 | At some future point, AnyEvent::Handle might switch to another TLS |
|
|
356 | implementation, then the option to use your own session object will go |
|
|
357 | away. |
|
|
358 | |
|
|
359 | B<IMPORTANT:> since Net::SSLeay "objects" are really only integers, |
|
|
360 | passing in the wrong integer will lead to certain crash. This most often |
|
|
361 | happens when one uses a stylish C<< tls => 1 >> and is surprised about the |
|
|
362 | segmentation fault. |
|
|
363 | |
230 | See the C<starttls> method if you need to start TLS negotiation later. |
364 | See the C<< ->starttls >> method for when need to start TLS negotiation later. |
231 | |
365 | |
232 | =item tls_ctx => $ssl_ctx |
366 | =item tls_ctx => $anyevent_tls |
233 | |
367 | |
234 | Use the given Net::SSLeay::CTX object to create the new TLS connection |
368 | Use the given C<AnyEvent::TLS> object to create the new TLS connection |
235 | (unless a connection object was specified directly). If this parameter is |
369 | (unless a connection object was specified directly). If this parameter is |
236 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
370 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
237 | |
371 | |
|
|
372 | Instead of an object, you can also specify a hash reference with C<< key |
|
|
373 | => value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a |
|
|
374 | new TLS context object. |
|
|
375 | |
|
|
376 | =item on_starttls => $cb->($handle, $success[, $error_message]) |
|
|
377 | |
|
|
378 | This callback will be invoked when the TLS/SSL handshake has finished. If |
|
|
379 | C<$success> is true, then the TLS handshake succeeded, otherwise it failed |
|
|
380 | (C<on_stoptls> will not be called in this case). |
|
|
381 | |
|
|
382 | The session in C<< $handle->{tls} >> can still be examined in this |
|
|
383 | callback, even when the handshake was not successful. |
|
|
384 | |
|
|
385 | TLS handshake failures will not cause C<on_error> to be invoked when this |
|
|
386 | callback is in effect, instead, the error message will be passed to C<on_starttls>. |
|
|
387 | |
|
|
388 | Without this callback, handshake failures lead to C<on_error> being |
|
|
389 | called, as normal. |
|
|
390 | |
|
|
391 | Note that you cannot call C<starttls> right again in this callback. If you |
|
|
392 | need to do that, start an zero-second timer instead whose callback can |
|
|
393 | then call C<< ->starttls >> again. |
|
|
394 | |
|
|
395 | =item on_stoptls => $cb->($handle) |
|
|
396 | |
|
|
397 | When a SSLv3/TLS shutdown/close notify/EOF is detected and this callback is |
|
|
398 | set, then it will be invoked after freeing the TLS session. If it is not, |
|
|
399 | then a TLS shutdown condition will be treated like a normal EOF condition |
|
|
400 | on the handle. |
|
|
401 | |
|
|
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. |
|
|
407 | |
238 | =item json => JSON or JSON::XS object |
408 | =item json => JSON or JSON::XS object |
239 | |
409 | |
240 | 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. |
241 | |
411 | |
242 | If you don't supply it, then AnyEvent::Handle will create and use a |
412 | If you don't supply it, then AnyEvent::Handle will create and use a |
243 | suitable one, which will write and expect UTF-8 encoded JSON texts. |
413 | suitable one (on demand), which will write and expect UTF-8 encoded JSON |
|
|
414 | texts. |
244 | |
415 | |
245 | Note that you are responsible to depend on the JSON module if you want to |
416 | Note that you are responsible to depend on the JSON module if you want to |
246 | use this functionality, as AnyEvent does not have a dependency itself. |
417 | use this functionality, as AnyEvent does not have a dependency itself. |
247 | |
418 | |
248 | =item filter_r => $cb |
|
|
249 | |
|
|
250 | =item filter_w => $cb |
|
|
251 | |
|
|
252 | These exist, but are undocumented at this time. |
|
|
253 | |
|
|
254 | =back |
419 | =back |
255 | |
420 | |
256 | =cut |
421 | =cut |
257 | |
422 | |
258 | sub new { |
423 | sub new { |
259 | my $class = shift; |
424 | my $class = shift; |
260 | |
|
|
261 | my $self = bless { @_ }, $class; |
425 | my $self = bless { @_ }, $class; |
262 | |
426 | |
263 | $self->{fh} or Carp::croak "mandatory argument fh is missing"; |
427 | if ($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) = @_; |
264 | |
490 | |
265 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
491 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
266 | |
492 | |
267 | if ($self->{tls}) { |
493 | $self->{_activity} = |
268 | require Net::SSLeay; |
494 | $self->{_ractivity} = |
269 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
|
|
270 | } |
|
|
271 | |
|
|
272 | $self->{_activity} = AnyEvent->now; |
495 | $self->{_wactivity} = AE::now; |
273 | $self->_timeout; |
|
|
274 | |
496 | |
275 | $self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain}; |
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 | |
276 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
501 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
277 | |
502 | |
|
|
503 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}) |
|
|
504 | if $self->{tls}; |
|
|
505 | |
|
|
506 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
|
|
507 | |
278 | $self->start_read |
508 | $self->start_read |
279 | if $self->{on_read}; |
509 | if $self->{on_read} || @{ $self->{_queue} }; |
280 | |
510 | |
281 | $self |
511 | $self->_drain_wbuf; |
282 | } |
512 | } |
283 | |
513 | |
284 | sub _shutdown { |
514 | #sub _shutdown { |
285 | my ($self) = @_; |
515 | # my ($self) = @_; |
286 | |
516 | # |
287 | delete $self->{_tw}; |
517 | # delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)}; |
288 | delete $self->{_rw}; |
518 | # $self->{_eof} = 1; # tell starttls et. al to stop trying |
289 | delete $self->{_ww}; |
519 | # |
290 | delete $self->{fh}; |
520 | # &_freetls; |
291 | |
521 | #} |
292 | $self->stoptls; |
|
|
293 | } |
|
|
294 | |
522 | |
295 | sub _error { |
523 | sub _error { |
296 | my ($self, $errno, $fatal) = @_; |
524 | my ($self, $errno, $fatal, $message) = @_; |
297 | |
|
|
298 | $self->_shutdown |
|
|
299 | if $fatal; |
|
|
300 | |
525 | |
301 | $! = $errno; |
526 | $! = $errno; |
|
|
527 | $message ||= "$!"; |
302 | |
528 | |
303 | if ($self->{on_error}) { |
529 | if ($self->{on_error}) { |
304 | $self->{on_error}($self, $fatal); |
530 | $self->{on_error}($self, $fatal, $message); |
305 | } else { |
531 | $self->destroy if $fatal; |
|
|
532 | } elsif ($self->{fh}) { |
|
|
533 | $self->destroy; |
306 | Carp::croak "AnyEvent::Handle uncaught error: $!"; |
534 | Carp::croak "AnyEvent::Handle uncaught error: $message"; |
307 | } |
535 | } |
308 | } |
536 | } |
309 | |
537 | |
310 | =item $fh = $handle->fh |
538 | =item $fh = $handle->fh |
311 | |
539 | |
312 | This method returns the file handle of the L<AnyEvent::Handle> object. |
540 | This method returns the file handle used to create the L<AnyEvent::Handle> object. |
313 | |
541 | |
314 | =cut |
542 | =cut |
315 | |
543 | |
316 | sub fh { $_[0]{fh} } |
544 | sub fh { $_[0]{fh} } |
317 | |
545 | |
… | |
… | |
335 | $_[0]{on_eof} = $_[1]; |
563 | $_[0]{on_eof} = $_[1]; |
336 | } |
564 | } |
337 | |
565 | |
338 | =item $handle->on_timeout ($cb) |
566 | =item $handle->on_timeout ($cb) |
339 | |
567 | |
340 | Replace the current C<on_timeout> callback, or disables the callback |
568 | =item $handle->on_rtimeout ($cb) |
341 | (but not the timeout) if C<$cb> = C<undef>. See C<timeout> constructor |
|
|
342 | argument. |
|
|
343 | |
569 | |
344 | =cut |
570 | =item $handle->on_wtimeout ($cb) |
345 | |
571 | |
346 | sub on_timeout { |
572 | Replace the current C<on_timeout>, C<on_rtimeout> or C<on_wtimeout> |
347 | $_[0]{on_timeout} = $_[1]; |
573 | callback, or disables the callback (but not the timeout) if C<$cb> = |
348 | } |
574 | C<undef>. See the C<timeout> constructor argument and method. |
|
|
575 | |
|
|
576 | =cut |
|
|
577 | |
|
|
578 | # see below |
349 | |
579 | |
350 | =item $handle->autocork ($boolean) |
580 | =item $handle->autocork ($boolean) |
351 | |
581 | |
352 | Enables or disables the current autocork behaviour (see C<autocork> |
582 | Enables or disables the current autocork behaviour (see C<autocork> |
353 | constructor argument). |
583 | constructor argument). Changes will only take effect on the next write. |
354 | |
584 | |
355 | =cut |
585 | =cut |
|
|
586 | |
|
|
587 | sub autocork { |
|
|
588 | $_[0]{autocork} = $_[1]; |
|
|
589 | } |
356 | |
590 | |
357 | =item $handle->no_delay ($boolean) |
591 | =item $handle->no_delay ($boolean) |
358 | |
592 | |
359 | 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 |
360 | the same name for details). |
594 | the same name for details). |
… | |
… | |
364 | sub no_delay { |
598 | sub no_delay { |
365 | $_[0]{no_delay} = $_[1]; |
599 | $_[0]{no_delay} = $_[1]; |
366 | |
600 | |
367 | eval { |
601 | eval { |
368 | local $SIG{__DIE__}; |
602 | local $SIG{__DIE__}; |
369 | 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}; |
370 | }; |
605 | }; |
371 | } |
606 | } |
372 | |
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 | |
373 | ############################################################################# |
638 | ############################################################################# |
374 | |
639 | |
375 | =item $handle->timeout ($seconds) |
640 | =item $handle->timeout ($seconds) |
376 | |
641 | |
|
|
642 | =item $handle->rtimeout ($seconds) |
|
|
643 | |
|
|
644 | =item $handle->wtimeout ($seconds) |
|
|
645 | |
377 | Configures (or disables) the inactivity timeout. |
646 | Configures (or disables) the inactivity timeout. |
378 | |
647 | |
379 | =cut |
648 | =item $handle->timeout_reset |
380 | |
649 | |
381 | 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 { |
382 | my ($self, $timeout) = @_; |
672 | my ($self, $new_value) = @_; |
383 | |
673 | |
384 | $self->{timeout} = $timeout; |
674 | $self->{$timeout} = $new_value; |
385 | $self->_timeout; |
675 | delete $self->{$tw}; &$cb; |
386 | } |
676 | }; |
387 | |
677 | |
|
|
678 | *{"${dir}timeout_reset"} = sub { |
|
|
679 | $_[0]{$activity} = AE::now; |
|
|
680 | }; |
|
|
681 | |
|
|
682 | # main workhorse: |
388 | # reset the timeout watcher, as neccessary |
683 | # reset the timeout watcher, as neccessary |
389 | # also check for time-outs |
684 | # also check for time-outs |
390 | sub _timeout { |
685 | $cb = sub { |
391 | my ($self) = @_; |
686 | my ($self) = @_; |
392 | |
687 | |
393 | if ($self->{timeout}) { |
688 | if ($self->{$timeout} && $self->{fh}) { |
394 | my $NOW = AnyEvent->now; |
689 | my $NOW = AE::now; |
395 | |
690 | |
396 | # when would the timeout trigger? |
691 | # when would the timeout trigger? |
397 | my $after = $self->{_activity} + $self->{timeout} - $NOW; |
692 | my $after = $self->{$activity} + $self->{$timeout} - $NOW; |
398 | |
693 | |
399 | # now or in the past already? |
694 | # now or in the past already? |
400 | if ($after <= 0) { |
695 | if ($after <= 0) { |
401 | $self->{_activity} = $NOW; |
696 | $self->{$activity} = $NOW; |
402 | |
697 | |
403 | if ($self->{on_timeout}) { |
698 | if ($self->{$on_timeout}) { |
404 | $self->{on_timeout}($self); |
699 | $self->{$on_timeout}($self); |
405 | } else { |
700 | } else { |
406 | $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}; |
407 | } |
709 | } |
408 | |
710 | |
409 | # callback could have changed timeout value, optimise |
711 | Scalar::Util::weaken $self; |
410 | return unless $self->{timeout}; |
712 | return unless $self; # ->error could have destroyed $self |
411 | |
713 | |
412 | # calculate new after |
714 | $self->{$tw} ||= AE::timer $after, 0, sub { |
413 | $after = $self->{timeout}; |
715 | delete $self->{$tw}; |
|
|
716 | $cb->($self); |
|
|
717 | }; |
|
|
718 | } else { |
|
|
719 | delete $self->{$tw}; |
414 | } |
720 | } |
415 | |
|
|
416 | Scalar::Util::weaken $self; |
|
|
417 | return unless $self; # ->error could have destroyed $self |
|
|
418 | |
|
|
419 | $self->{_tw} ||= AnyEvent->timer (after => $after, cb => sub { |
|
|
420 | delete $self->{_tw}; |
|
|
421 | $self->_timeout; |
|
|
422 | }); |
|
|
423 | } else { |
|
|
424 | delete $self->{_tw}; |
|
|
425 | } |
721 | } |
426 | } |
722 | } |
427 | |
723 | |
428 | ############################################################################# |
724 | ############################################################################# |
429 | |
725 | |
… | |
… | |
453 | my ($self, $cb) = @_; |
749 | my ($self, $cb) = @_; |
454 | |
750 | |
455 | $self->{on_drain} = $cb; |
751 | $self->{on_drain} = $cb; |
456 | |
752 | |
457 | $cb->($self) |
753 | $cb->($self) |
458 | if $cb && $self->{low_water_mark} >= length $self->{wbuf}; |
754 | if $cb && $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}); |
459 | } |
755 | } |
460 | |
756 | |
461 | =item $handle->push_write ($data) |
757 | =item $handle->push_write ($data) |
462 | |
758 | |
463 | Queues the given scalar to be written. You can push as much data as you |
759 | Queues the given scalar to be written. You can push as much data as you |
… | |
… | |
474 | Scalar::Util::weaken $self; |
770 | Scalar::Util::weaken $self; |
475 | |
771 | |
476 | my $cb = sub { |
772 | my $cb = sub { |
477 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
773 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
478 | |
774 | |
479 | if ($len >= 0) { |
775 | if (defined $len) { |
480 | substr $self->{wbuf}, 0, $len, ""; |
776 | substr $self->{wbuf}, 0, $len, ""; |
481 | |
777 | |
482 | $self->{_activity} = AnyEvent->now; |
778 | $self->{_activity} = $self->{_wactivity} = AE::now; |
483 | |
779 | |
484 | $self->{on_drain}($self) |
780 | $self->{on_drain}($self) |
485 | if $self->{low_water_mark} >= length $self->{wbuf} |
781 | if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}) |
486 | && $self->{on_drain}; |
782 | && $self->{on_drain}; |
487 | |
783 | |
488 | delete $self->{_ww} unless length $self->{wbuf}; |
784 | delete $self->{_ww} unless length $self->{wbuf}; |
489 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
785 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
490 | $self->_error ($!, 1); |
786 | $self->_error ($!, 1); |
… | |
… | |
493 | |
789 | |
494 | # try to write data immediately |
790 | # try to write data immediately |
495 | $cb->() unless $self->{autocork}; |
791 | $cb->() unless $self->{autocork}; |
496 | |
792 | |
497 | # if still data left in wbuf, we need to poll |
793 | # if still data left in wbuf, we need to poll |
498 | $self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb) |
794 | $self->{_ww} = AE::io $self->{fh}, 1, $cb |
499 | if length $self->{wbuf}; |
795 | if length $self->{wbuf}; |
500 | }; |
796 | }; |
501 | } |
797 | } |
502 | |
798 | |
503 | our %WH; |
799 | our %WH; |
… | |
… | |
514 | |
810 | |
515 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
811 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
516 | ->($self, @_); |
812 | ->($self, @_); |
517 | } |
813 | } |
518 | |
814 | |
519 | if ($self->{filter_w}) { |
815 | if ($self->{tls}) { |
520 | $self->{filter_w}($self, \$_[0]); |
816 | $self->{_tls_wbuf} .= $_[0]; |
|
|
817 | &_dotls ($self) if $self->{fh}; |
521 | } else { |
818 | } else { |
522 | $self->{wbuf} .= $_[0]; |
819 | $self->{wbuf} .= $_[0]; |
523 | $self->_drain_wbuf; |
820 | $self->_drain_wbuf if $self->{fh}; |
524 | } |
821 | } |
525 | } |
822 | } |
526 | |
823 | |
527 | =item $handle->push_write (type => @args) |
824 | =item $handle->push_write (type => @args) |
528 | |
825 | |
… | |
… | |
542 | =cut |
839 | =cut |
543 | |
840 | |
544 | register_write_type netstring => sub { |
841 | register_write_type netstring => sub { |
545 | my ($self, $string) = @_; |
842 | my ($self, $string) = @_; |
546 | |
843 | |
547 | sprintf "%d:%s,", (length $string), $string |
844 | (length $string) . ":$string," |
548 | }; |
845 | }; |
549 | |
846 | |
550 | =item packstring => $format, $data |
847 | =item packstring => $format, $data |
551 | |
848 | |
552 | An octet string prefixed with an encoded length. The encoding C<$format> |
849 | An octet string prefixed with an encoded length. The encoding C<$format> |
… | |
… | |
617 | |
914 | |
618 | pack "w/a*", Storable::nfreeze ($ref) |
915 | pack "w/a*", Storable::nfreeze ($ref) |
619 | }; |
916 | }; |
620 | |
917 | |
621 | =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 | } |
622 | |
944 | |
623 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
945 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
624 | |
946 | |
625 | 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>. |
626 | 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 |
… | |
… | |
720 | =cut |
1042 | =cut |
721 | |
1043 | |
722 | sub _drain_rbuf { |
1044 | sub _drain_rbuf { |
723 | my ($self) = @_; |
1045 | my ($self) = @_; |
724 | |
1046 | |
|
|
1047 | # avoid recursion |
|
|
1048 | return if $self->{_skip_drain_rbuf}; |
725 | local $self->{_in_drain} = 1; |
1049 | local $self->{_skip_drain_rbuf} = 1; |
726 | |
|
|
727 | if ( |
|
|
728 | defined $self->{rbuf_max} |
|
|
729 | && $self->{rbuf_max} < length $self->{rbuf} |
|
|
730 | ) { |
|
|
731 | return $self->_error (&Errno::ENOSPC, 1); |
|
|
732 | } |
|
|
733 | |
1050 | |
734 | while () { |
1051 | while () { |
735 | no strict 'refs'; |
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}; |
736 | |
1056 | |
737 | my $len = length $self->{rbuf}; |
1057 | my $len = length $self->{rbuf}; |
738 | |
1058 | |
739 | if (my $cb = shift @{ $self->{_queue} }) { |
1059 | if (my $cb = shift @{ $self->{_queue} }) { |
740 | unless ($cb->($self)) { |
1060 | unless ($cb->($self)) { |
741 | if ($self->{_eof}) { |
1061 | # no progress can be made |
742 | # no progress can be made (not enough data and no data forthcoming) |
1062 | # (not enough data and no data forthcoming) |
743 | $self->_error (&Errno::EPIPE, 1), last; |
1063 | $self->_error (Errno::EPIPE, 1), return |
744 | } |
1064 | if $self->{_eof}; |
745 | |
1065 | |
746 | unshift @{ $self->{_queue} }, $cb; |
1066 | unshift @{ $self->{_queue} }, $cb; |
747 | last; |
1067 | last; |
748 | } |
1068 | } |
749 | } elsif ($self->{on_read}) { |
1069 | } elsif ($self->{on_read}) { |
… | |
… | |
756 | && !@{ $self->{_queue} } # and the queue is still empty |
1076 | && !@{ $self->{_queue} } # and the queue is still empty |
757 | && $self->{on_read} # but we still have on_read |
1077 | && $self->{on_read} # but we still have on_read |
758 | ) { |
1078 | ) { |
759 | # no further data will arrive |
1079 | # no further data will arrive |
760 | # so no progress can be made |
1080 | # so no progress can be made |
761 | $self->_error (&Errno::EPIPE, 1), last |
1081 | $self->_error (Errno::EPIPE, 1), return |
762 | if $self->{_eof}; |
1082 | if $self->{_eof}; |
763 | |
1083 | |
764 | last; # more data might arrive |
1084 | last; # more data might arrive |
765 | } |
1085 | } |
766 | } else { |
1086 | } else { |
767 | # read side becomes idle |
1087 | # read side becomes idle |
768 | delete $self->{_rw}; |
1088 | delete $self->{_rw} unless $self->{tls}; |
769 | last; |
1089 | last; |
770 | } |
1090 | } |
771 | } |
1091 | } |
772 | |
1092 | |
|
|
1093 | if ($self->{_eof}) { |
|
|
1094 | $self->{on_eof} |
773 | $self->{on_eof}($self) |
1095 | ? $self->{on_eof}($self) |
774 | if $self->{_eof} && $self->{on_eof}; |
1096 | : $self->_error (0, 1, "Unexpected end-of-file"); |
|
|
1097 | |
|
|
1098 | return; |
|
|
1099 | } |
|
|
1100 | |
|
|
1101 | if ( |
|
|
1102 | defined $self->{rbuf_max} |
|
|
1103 | && $self->{rbuf_max} < length $self->{rbuf} |
|
|
1104 | ) { |
|
|
1105 | $self->_error (Errno::ENOSPC, 1), return; |
|
|
1106 | } |
775 | |
1107 | |
776 | # may need to restart read watcher |
1108 | # may need to restart read watcher |
777 | unless ($self->{_rw}) { |
1109 | unless ($self->{_rw}) { |
778 | $self->start_read |
1110 | $self->start_read |
779 | if $self->{on_read} || @{ $self->{_queue} }; |
1111 | if $self->{on_read} || @{ $self->{_queue} }; |
… | |
… | |
790 | |
1122 | |
791 | sub on_read { |
1123 | sub on_read { |
792 | my ($self, $cb) = @_; |
1124 | my ($self, $cb) = @_; |
793 | |
1125 | |
794 | $self->{on_read} = $cb; |
1126 | $self->{on_read} = $cb; |
795 | $self->_drain_rbuf if $cb && !$self->{_in_drain}; |
1127 | $self->_drain_rbuf if $cb; |
796 | } |
1128 | } |
797 | |
1129 | |
798 | =item $handle->rbuf |
1130 | =item $handle->rbuf |
799 | |
1131 | |
800 | Returns the read buffer (as a modifiable lvalue). |
1132 | Returns the read buffer (as a modifiable lvalue). |
801 | |
1133 | |
802 | 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} >> |
803 | 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. |
804 | |
1139 | |
805 | 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>, |
806 | 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 |
807 | automatically manage the read buffer. |
1142 | automatically manage the read buffer. |
808 | |
1143 | |
… | |
… | |
849 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
1184 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
850 | ->($self, $cb, @_); |
1185 | ->($self, $cb, @_); |
851 | } |
1186 | } |
852 | |
1187 | |
853 | push @{ $self->{_queue} }, $cb; |
1188 | push @{ $self->{_queue} }, $cb; |
854 | $self->_drain_rbuf unless $self->{_in_drain}; |
1189 | $self->_drain_rbuf; |
855 | } |
1190 | } |
856 | |
1191 | |
857 | sub unshift_read { |
1192 | sub unshift_read { |
858 | my $self = shift; |
1193 | my $self = shift; |
859 | my $cb = pop; |
1194 | my $cb = pop; |
… | |
… | |
865 | ->($self, $cb, @_); |
1200 | ->($self, $cb, @_); |
866 | } |
1201 | } |
867 | |
1202 | |
868 | |
1203 | |
869 | unshift @{ $self->{_queue} }, $cb; |
1204 | unshift @{ $self->{_queue} }, $cb; |
870 | $self->_drain_rbuf unless $self->{_in_drain}; |
1205 | $self->_drain_rbuf; |
871 | } |
1206 | } |
872 | |
1207 | |
873 | =item $handle->push_read (type => @args, $cb) |
1208 | =item $handle->push_read (type => @args, $cb) |
874 | |
1209 | |
875 | =item $handle->unshift_read (type => @args, $cb) |
1210 | =item $handle->unshift_read (type => @args, $cb) |
… | |
… | |
905 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
1240 | $cb->($_[0], substr $_[0]{rbuf}, 0, $len, ""); |
906 | 1 |
1241 | 1 |
907 | } |
1242 | } |
908 | }; |
1243 | }; |
909 | |
1244 | |
910 | # compatibility with older API |
|
|
911 | sub push_read_chunk { |
|
|
912 | $_[0]->push_read (chunk => $_[1], $_[2]); |
|
|
913 | } |
|
|
914 | |
|
|
915 | sub unshift_read_chunk { |
|
|
916 | $_[0]->unshift_read (chunk => $_[1], $_[2]); |
|
|
917 | } |
|
|
918 | |
|
|
919 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
1245 | =item line => [$eol, ]$cb->($handle, $line, $eol) |
920 | |
1246 | |
921 | The callback will be called only once a full line (including the end of |
1247 | The callback will be called only once a full line (including the end of |
922 | line marker, C<$eol>) has been read. This line (excluding the end of line |
1248 | line marker, C<$eol>) has been read. This line (excluding the end of line |
923 | marker) will be passed to the callback as second argument (C<$line>), and |
1249 | marker) will be passed to the callback as second argument (C<$line>), and |
… | |
… | |
938 | =cut |
1264 | =cut |
939 | |
1265 | |
940 | register_read_type line => sub { |
1266 | register_read_type line => sub { |
941 | my ($self, $cb, $eol) = @_; |
1267 | my ($self, $cb, $eol) = @_; |
942 | |
1268 | |
943 | $eol = qr|(\015?\012)| if @_ < 3; |
1269 | if (@_ < 3) { |
|
|
1270 | # this is more than twice as fast as the generic code below |
|
|
1271 | sub { |
|
|
1272 | $_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return; |
|
|
1273 | |
|
|
1274 | $cb->($_[0], $1, $2); |
|
|
1275 | 1 |
|
|
1276 | } |
|
|
1277 | } else { |
944 | $eol = quotemeta $eol unless ref $eol; |
1278 | $eol = quotemeta $eol unless ref $eol; |
945 | $eol = qr|^(.*?)($eol)|s; |
1279 | $eol = qr|^(.*?)($eol)|s; |
946 | |
1280 | |
947 | sub { |
1281 | sub { |
948 | $_[0]{rbuf} =~ s/$eol// or return; |
1282 | $_[0]{rbuf} =~ s/$eol// or return; |
949 | |
1283 | |
950 | $cb->($_[0], $1, $2); |
1284 | $cb->($_[0], $1, $2); |
|
|
1285 | 1 |
951 | 1 |
1286 | } |
952 | } |
1287 | } |
953 | }; |
1288 | }; |
954 | |
|
|
955 | # compatibility with older API |
|
|
956 | sub push_read_line { |
|
|
957 | my $self = shift; |
|
|
958 | $self->push_read (line => @_); |
|
|
959 | } |
|
|
960 | |
|
|
961 | sub unshift_read_line { |
|
|
962 | my $self = shift; |
|
|
963 | $self->unshift_read (line => @_); |
|
|
964 | } |
|
|
965 | |
1289 | |
966 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
1290 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
967 | |
1291 | |
968 | Makes a regex match against the regex object C<$accept> and returns |
1292 | Makes a regex match against the regex object C<$accept> and returns |
969 | everything up to and including the match. |
1293 | everything up to and including the match. |
… | |
… | |
1019 | return 1; |
1343 | return 1; |
1020 | } |
1344 | } |
1021 | |
1345 | |
1022 | # reject |
1346 | # reject |
1023 | if ($reject && $$rbuf =~ $reject) { |
1347 | if ($reject && $$rbuf =~ $reject) { |
1024 | $self->_error (&Errno::EBADMSG); |
1348 | $self->_error (Errno::EBADMSG); |
1025 | } |
1349 | } |
1026 | |
1350 | |
1027 | # skip |
1351 | # skip |
1028 | if ($skip && $$rbuf =~ $skip) { |
1352 | if ($skip && $$rbuf =~ $skip) { |
1029 | $data .= substr $$rbuf, 0, $+[0], ""; |
1353 | $data .= substr $$rbuf, 0, $+[0], ""; |
… | |
… | |
1045 | my ($self, $cb) = @_; |
1369 | my ($self, $cb) = @_; |
1046 | |
1370 | |
1047 | sub { |
1371 | sub { |
1048 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
1372 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
1049 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
1373 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
1050 | $self->_error (&Errno::EBADMSG); |
1374 | $self->_error (Errno::EBADMSG); |
1051 | } |
1375 | } |
1052 | return; |
1376 | return; |
1053 | } |
1377 | } |
1054 | |
1378 | |
1055 | my $len = $1; |
1379 | my $len = $1; |
… | |
… | |
1058 | my $string = $_[1]; |
1382 | my $string = $_[1]; |
1059 | $_[0]->unshift_read (chunk => 1, sub { |
1383 | $_[0]->unshift_read (chunk => 1, sub { |
1060 | if ($_[1] eq ",") { |
1384 | if ($_[1] eq ",") { |
1061 | $cb->($_[0], $string); |
1385 | $cb->($_[0], $string); |
1062 | } else { |
1386 | } else { |
1063 | $self->_error (&Errno::EBADMSG); |
1387 | $self->_error (Errno::EBADMSG); |
1064 | } |
1388 | } |
1065 | }); |
1389 | }); |
1066 | }); |
1390 | }); |
1067 | |
1391 | |
1068 | 1 |
1392 | 1 |
… | |
… | |
1074 | An octet string prefixed with an encoded length. The encoding C<$format> |
1398 | An octet string prefixed with an encoded length. The encoding C<$format> |
1075 | uses the same format as a Perl C<pack> format, but must specify a single |
1399 | uses the same format as a Perl C<pack> format, but must specify a single |
1076 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
1400 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
1077 | optional C<!>, C<< < >> or C<< > >> modifier). |
1401 | optional C<!>, C<< < >> or C<< > >> modifier). |
1078 | |
1402 | |
1079 | DNS over TCP uses a prefix of C<n>, EPP uses a prefix of C<N>. |
1403 | For example, DNS over TCP uses a prefix of C<n> (2 octet network order), |
|
|
1404 | EPP uses a prefix of C<N> (4 octtes). |
1080 | |
1405 | |
1081 | Example: read a block of data prefixed by its length in BER-encoded |
1406 | Example: read a block of data prefixed by its length in BER-encoded |
1082 | format (very efficient). |
1407 | format (very efficient). |
1083 | |
1408 | |
1084 | $handle->push_read (packstring => "w", sub { |
1409 | $handle->push_read (packstring => "w", sub { |
… | |
… | |
1090 | register_read_type packstring => sub { |
1415 | register_read_type packstring => sub { |
1091 | my ($self, $cb, $format) = @_; |
1416 | my ($self, $cb, $format) = @_; |
1092 | |
1417 | |
1093 | sub { |
1418 | sub { |
1094 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1419 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1095 | defined (my $len = eval { unpack $format, $_[0]->{rbuf} }) |
1420 | defined (my $len = eval { unpack $format, $_[0]{rbuf} }) |
1096 | or return; |
1421 | or return; |
1097 | |
1422 | |
|
|
1423 | $format = length pack $format, $len; |
|
|
1424 | |
|
|
1425 | # bypass unshift if we already have the remaining chunk |
|
|
1426 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1427 | my $data = substr $_[0]{rbuf}, $format, $len; |
|
|
1428 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1429 | $cb->($_[0], $data); |
|
|
1430 | } else { |
1098 | # remove prefix |
1431 | # remove prefix |
1099 | substr $_[0]->{rbuf}, 0, (length pack $format, $len), ""; |
1432 | substr $_[0]{rbuf}, 0, $format, ""; |
1100 | |
1433 | |
1101 | # read rest |
1434 | # read remaining chunk |
1102 | $_[0]->unshift_read (chunk => $len, $cb); |
1435 | $_[0]->unshift_read (chunk => $len, $cb); |
|
|
1436 | } |
1103 | |
1437 | |
1104 | 1 |
1438 | 1 |
1105 | } |
1439 | } |
1106 | }; |
1440 | }; |
1107 | |
1441 | |
1108 | =item json => $cb->($handle, $hash_or_arrayref) |
1442 | =item json => $cb->($handle, $hash_or_arrayref) |
1109 | |
1443 | |
1110 | Reads a JSON object or array, decodes it and passes it to the callback. |
1444 | Reads a JSON object or array, decodes it and passes it to the |
|
|
1445 | callback. When a parse error occurs, an C<EBADMSG> error will be raised. |
1111 | |
1446 | |
1112 | If a C<json> object was passed to the constructor, then that will be used |
1447 | If a C<json> object was passed to the constructor, then that will be used |
1113 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
1448 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
1114 | |
1449 | |
1115 | This read type uses the incremental parser available with JSON version |
1450 | This read type uses the incremental parser available with JSON version |
… | |
… | |
1124 | =cut |
1459 | =cut |
1125 | |
1460 | |
1126 | register_read_type json => sub { |
1461 | register_read_type json => sub { |
1127 | my ($self, $cb) = @_; |
1462 | my ($self, $cb) = @_; |
1128 | |
1463 | |
1129 | require JSON; |
1464 | my $json = $self->{json} ||= |
|
|
1465 | eval { require JSON::XS; JSON::XS->new->utf8 } |
|
|
1466 | || do { require JSON; JSON->new->utf8 }; |
1130 | |
1467 | |
1131 | my $data; |
1468 | my $data; |
1132 | my $rbuf = \$self->{rbuf}; |
1469 | my $rbuf = \$self->{rbuf}; |
1133 | |
1470 | |
1134 | my $json = $self->{json} ||= JSON->new->utf8; |
|
|
1135 | |
|
|
1136 | sub { |
1471 | sub { |
1137 | my $ref = $json->incr_parse ($self->{rbuf}); |
1472 | my $ref = eval { $json->incr_parse ($self->{rbuf}) }; |
1138 | |
1473 | |
1139 | if ($ref) { |
1474 | if ($ref) { |
1140 | $self->{rbuf} = $json->incr_text; |
1475 | $self->{rbuf} = $json->incr_text; |
1141 | $json->incr_text = ""; |
1476 | $json->incr_text = ""; |
1142 | $cb->($self, $ref); |
1477 | $cb->($self, $ref); |
1143 | |
1478 | |
1144 | 1 |
1479 | 1 |
|
|
1480 | } elsif ($@) { |
|
|
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 | () |
1145 | } else { |
1490 | } else { |
1146 | $self->{rbuf} = ""; |
1491 | $self->{rbuf} = ""; |
|
|
1492 | |
1147 | () |
1493 | () |
1148 | } |
1494 | } |
1149 | } |
1495 | } |
1150 | }; |
1496 | }; |
1151 | |
1497 | |
… | |
… | |
1164 | |
1510 | |
1165 | require Storable; |
1511 | require Storable; |
1166 | |
1512 | |
1167 | sub { |
1513 | sub { |
1168 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1514 | # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method |
1169 | defined (my $len = eval { unpack "w", $_[0]->{rbuf} }) |
1515 | defined (my $len = eval { unpack "w", $_[0]{rbuf} }) |
1170 | or return; |
1516 | or return; |
1171 | |
1517 | |
|
|
1518 | my $format = length pack "w", $len; |
|
|
1519 | |
|
|
1520 | # bypass unshift if we already have the remaining chunk |
|
|
1521 | if ($format + $len <= length $_[0]{rbuf}) { |
|
|
1522 | my $data = substr $_[0]{rbuf}, $format, $len; |
|
|
1523 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1524 | $cb->($_[0], Storable::thaw ($data)); |
|
|
1525 | } else { |
1172 | # remove prefix |
1526 | # remove prefix |
1173 | substr $_[0]->{rbuf}, 0, (length pack "w", $len), ""; |
1527 | substr $_[0]{rbuf}, 0, $format, ""; |
1174 | |
1528 | |
1175 | # read rest |
1529 | # read remaining chunk |
1176 | $_[0]->unshift_read (chunk => $len, sub { |
1530 | $_[0]->unshift_read (chunk => $len, sub { |
1177 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1531 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1178 | $cb->($_[0], $ref); |
1532 | $cb->($_[0], $ref); |
1179 | } else { |
1533 | } else { |
1180 | $self->_error (&Errno::EBADMSG); |
1534 | $self->_error (Errno::EBADMSG); |
|
|
1535 | } |
1181 | } |
1536 | }); |
1182 | }); |
1537 | } |
|
|
1538 | |
|
|
1539 | 1 |
1183 | } |
1540 | } |
1184 | }; |
1541 | }; |
1185 | |
1542 | |
1186 | =back |
1543 | =back |
1187 | |
1544 | |
… | |
… | |
1217 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
1574 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
1218 | you change the C<on_read> callback or push/unshift a read callback, and it |
1575 | you change the C<on_read> callback or push/unshift a read callback, and it |
1219 | will automatically C<stop_read> for you when neither C<on_read> is set nor |
1576 | will automatically C<stop_read> for you when neither C<on_read> is set nor |
1220 | there are any read requests in the queue. |
1577 | there are any read requests in the queue. |
1221 | |
1578 | |
|
|
1579 | These methods will have no effect when in TLS mode (as TLS doesn't support |
|
|
1580 | half-duplex connections). |
|
|
1581 | |
1222 | =cut |
1582 | =cut |
1223 | |
1583 | |
1224 | sub stop_read { |
1584 | sub stop_read { |
1225 | my ($self) = @_; |
1585 | my ($self) = @_; |
1226 | |
1586 | |
1227 | delete $self->{_rw}; |
1587 | delete $self->{_rw} unless $self->{tls}; |
1228 | } |
1588 | } |
1229 | |
1589 | |
1230 | sub start_read { |
1590 | sub start_read { |
1231 | my ($self) = @_; |
1591 | my ($self) = @_; |
1232 | |
1592 | |
1233 | unless ($self->{_rw} || $self->{_eof}) { |
1593 | unless ($self->{_rw} || $self->{_eof}) { |
1234 | Scalar::Util::weaken $self; |
1594 | Scalar::Util::weaken $self; |
1235 | |
1595 | |
1236 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
1596 | $self->{_rw} = AE::io $self->{fh}, 0, sub { |
1237 | my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; |
1597 | my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf}); |
1238 | 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; |
1239 | |
1599 | |
1240 | if ($len > 0) { |
1600 | if ($len > 0) { |
1241 | $self->{_activity} = AnyEvent->now; |
1601 | $self->{_activity} = $self->{_ractivity} = AE::now; |
1242 | |
1602 | |
1243 | $self->{filter_r} |
1603 | if ($self->{tls}) { |
1244 | ? $self->{filter_r}($self, $rbuf) |
1604 | Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf); |
1245 | : $self->{_in_drain} || $self->_drain_rbuf; |
1605 | |
|
|
1606 | &_dotls ($self); |
|
|
1607 | } else { |
|
|
1608 | $self->_drain_rbuf; |
|
|
1609 | } |
1246 | |
1610 | |
1247 | } elsif (defined $len) { |
1611 | } elsif (defined $len) { |
1248 | delete $self->{_rw}; |
1612 | delete $self->{_rw}; |
1249 | $self->{_eof} = 1; |
1613 | $self->{_eof} = 1; |
1250 | $self->_drain_rbuf unless $self->{_in_drain}; |
1614 | $self->_drain_rbuf; |
1251 | |
1615 | |
1252 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
1616 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
1253 | return $self->_error ($!, 1); |
1617 | return $self->_error ($!, 1); |
1254 | } |
1618 | } |
1255 | }); |
1619 | }; |
1256 | } |
1620 | } |
1257 | } |
1621 | } |
1258 | |
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, $err); |
|
|
1643 | } |
|
|
1644 | } |
|
|
1645 | |
|
|
1646 | # poll the write BIO and send the data if applicable |
|
|
1647 | # also decode read data if possible |
|
|
1648 | # this is basiclaly our TLS state machine |
|
|
1649 | # more efficient implementations are possible with openssl, |
|
|
1650 | # but not with the buggy and incomplete Net::SSLeay. |
1259 | sub _dotls { |
1651 | sub _dotls { |
1260 | my ($self) = @_; |
1652 | my ($self) = @_; |
1261 | |
1653 | |
1262 | my $buf; |
1654 | my $tmp; |
1263 | |
1655 | |
1264 | if (length $self->{_tls_wbuf}) { |
1656 | if (length $self->{_tls_wbuf}) { |
1265 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1657 | while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1266 | substr $self->{_tls_wbuf}, 0, $len, ""; |
1658 | substr $self->{_tls_wbuf}, 0, $tmp, ""; |
1267 | } |
1659 | } |
1268 | } |
|
|
1269 | |
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 || $!); |
|
|
1665 | } |
|
|
1666 | |
|
|
1667 | while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) { |
|
|
1668 | unless (length $tmp) { |
|
|
1669 | $self->{_on_starttls} |
|
|
1670 | and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ??? |
|
|
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 | } |
|
|
1681 | } |
|
|
1682 | |
|
|
1683 | $self->{_tls_rbuf} .= $tmp; |
|
|
1684 | $self->_drain_rbuf; |
|
|
1685 | $self->{tls} or return; # tls session might have gone away in callback |
|
|
1686 | } |
|
|
1687 | |
|
|
1688 | $tmp = Net::SSLeay::get_error ($self->{tls}, -1); |
|
|
1689 | return $self->_tls_error ($tmp) |
|
|
1690 | if $tmp != $ERROR_WANT_READ |
|
|
1691 | && ($tmp != $ERROR_SYSCALL || $!); |
|
|
1692 | |
1270 | if (length ($buf = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1693 | while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1271 | $self->{wbuf} .= $buf; |
1694 | $self->{wbuf} .= $tmp; |
1272 | $self->_drain_wbuf; |
1695 | $self->_drain_wbuf; |
1273 | } |
1696 | } |
1274 | |
1697 | |
1275 | while (defined ($buf = Net::SSLeay::read ($self->{tls}))) { |
1698 | $self->{_on_starttls} |
1276 | if (length $buf) { |
1699 | and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK () |
1277 | $self->{rbuf} .= $buf; |
1700 | and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established"); |
1278 | $self->_drain_rbuf unless $self->{_in_drain}; |
|
|
1279 | } else { |
|
|
1280 | # let's treat SSL-eof as we treat normal EOF |
|
|
1281 | $self->{_eof} = 1; |
|
|
1282 | $self->_shutdown; |
|
|
1283 | return; |
|
|
1284 | } |
|
|
1285 | } |
|
|
1286 | |
|
|
1287 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
|
|
1288 | |
|
|
1289 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
|
|
1290 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
|
|
1291 | return $self->_error ($!, 1); |
|
|
1292 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
|
|
1293 | return $self->_error (&Errno::EIO, 1); |
|
|
1294 | } |
|
|
1295 | |
|
|
1296 | # all others are fine for our purposes |
|
|
1297 | } |
|
|
1298 | } |
1701 | } |
1299 | |
1702 | |
1300 | =item $handle->starttls ($tls[, $tls_ctx]) |
1703 | =item $handle->starttls ($tls[, $tls_ctx]) |
1301 | |
1704 | |
1302 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
1705 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
1303 | 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 |
1304 | C<starttls>. |
1707 | C<starttls>. |
1305 | |
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 | |
1306 | 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 |
1307 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
1714 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
1308 | |
1715 | |
1309 | 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 |
1310 | 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. |
1311 | |
1720 | |
1312 | 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 |
1313 | call and can be used or changed to your liking. Note that the handshake |
1722 | context in C<< $handle->{tls_ctx} >> after this call and can be used or |
1314 | might have already started when this function returns. |
1723 | changed to your liking. Note that the handshake might have already started |
|
|
1724 | when this function returns. |
1315 | |
1725 | |
|
|
1726 | Due to bugs in OpenSSL, it might or might not be possible to do multiple |
|
|
1727 | handshakes on the same stream. Best do not attempt to use the stream after |
|
|
1728 | stopping TLS. |
|
|
1729 | |
1316 | =cut |
1730 | =cut |
|
|
1731 | |
|
|
1732 | our %TLS_CACHE; #TODO not yet documented, should we? |
1317 | |
1733 | |
1318 | sub starttls { |
1734 | sub starttls { |
1319 | my ($self, $ssl, $ctx) = @_; |
1735 | my ($self, $tls, $ctx) = @_; |
1320 | |
1736 | |
1321 | $self->stoptls; |
1737 | Carp::croak "It is an error to call starttls on an AnyEvent::Handle object while TLS is already active, caught" |
|
|
1738 | if $self->{tls}; |
1322 | |
1739 | |
1323 | if ($ssl eq "accept") { |
1740 | $self->{tls} = $tls; |
1324 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
1741 | $self->{tls_ctx} = $ctx if @_ > 2; |
1325 | Net::SSLeay::set_accept_state ($ssl); |
1742 | |
1326 | } elsif ($ssl eq "connect") { |
1743 | return unless $self->{fh}; |
1327 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
1744 | |
1328 | Net::SSLeay::set_connect_state ($ssl); |
1745 | require Net::SSLeay; |
|
|
1746 | |
|
|
1747 | $ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL (); |
|
|
1748 | $ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ (); |
|
|
1749 | |
|
|
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 | } |
1329 | } |
1765 | |
1330 | |
1766 | $self->{tls_ctx} = $ctx || TLS_CTX (); |
1331 | $self->{tls} = $ssl; |
1767 | $self->{tls} = $tls = $self->{tls_ctx}->_get_session ($tls, $self, $self->{peername}); |
1332 | |
1768 | |
1333 | # basically, this is deep magic (because SSL_read should have the same issues) |
1769 | # basically, this is deep magic (because SSL_read should have the same issues) |
1334 | # but the openssl maintainers basically said: "trust us, it just works". |
1770 | # but the openssl maintainers basically said: "trust us, it just works". |
1335 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
1771 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
1336 | # and mismaintained ssleay-module doesn't even offer them). |
1772 | # and mismaintained ssleay-module doesn't even offer them). |
1337 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
1773 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
|
|
1774 | # |
|
|
1775 | # in short: this is a mess. |
|
|
1776 | # |
|
|
1777 | # note that we do not try to keep the length constant between writes as we are required to do. |
|
|
1778 | # we assume that most (but not all) of this insanity only applies to non-blocking cases, |
|
|
1779 | # and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to |
|
|
1780 | # have identity issues in that area. |
1338 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
1781 | # Net::SSLeay::CTX_set_mode ($ssl, |
1339 | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
1782 | # (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
1340 | | (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); |
1341 | |
1785 | |
1342 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1786 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1343 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1787 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1344 | |
1788 | |
|
|
1789 | Net::SSLeay::BIO_write ($self->{_rbio}, delete $self->{rbuf}); |
|
|
1790 | |
1345 | Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio}); |
1791 | Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio}); |
1346 | |
1792 | |
1347 | $self->{filter_w} = sub { |
1793 | $self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) } |
1348 | $_[0]{_tls_wbuf} .= ${$_[1]}; |
1794 | if $self->{on_starttls}; |
1349 | &_dotls; |
1795 | |
1350 | }; |
1796 | &_dotls; # need to trigger the initial handshake |
1351 | $self->{filter_r} = sub { |
1797 | $self->start_read; # make sure we actually do read |
1352 | Net::SSLeay::BIO_write ($_[0]{_rbio}, ${$_[1]}); |
|
|
1353 | &_dotls; |
|
|
1354 | }; |
|
|
1355 | } |
1798 | } |
1356 | |
1799 | |
1357 | =item $handle->stoptls |
1800 | =item $handle->stoptls |
1358 | |
1801 | |
1359 | Destroys the SSL connection, if any. Partial read or write data will be |
1802 | Shuts down the SSL connection - this makes a proper EOF handshake by |
1360 | lost. |
1803 | sending a close notify to the other side, but since OpenSSL doesn't |
|
|
1804 | support non-blocking shut downs, it is not guarenteed that you can re-use |
|
|
1805 | the stream afterwards. |
1361 | |
1806 | |
1362 | =cut |
1807 | =cut |
1363 | |
1808 | |
1364 | sub stoptls { |
1809 | sub stoptls { |
1365 | my ($self) = @_; |
1810 | my ($self) = @_; |
1366 | |
1811 | |
1367 | Net::SSLeay::free (delete $self->{tls}) if $self->{tls}; |
1812 | if ($self->{tls}) { |
|
|
1813 | Net::SSLeay::shutdown ($self->{tls}); |
1368 | |
1814 | |
1369 | delete $self->{_rbio}; |
1815 | &_dotls; |
1370 | delete $self->{_wbio}; |
1816 | |
1371 | delete $self->{_tls_wbuf}; |
1817 | # # we don't give a shit. no, we do, but we can't. no...#d# |
1372 | delete $self->{filter_r}; |
1818 | # # we, we... have to use openssl :/#d# |
1373 | delete $self->{filter_w}; |
1819 | # &_freetls;#d# |
|
|
1820 | } |
|
|
1821 | } |
|
|
1822 | |
|
|
1823 | sub _freetls { |
|
|
1824 | my ($self) = @_; |
|
|
1825 | |
|
|
1826 | return unless $self->{tls}; |
|
|
1827 | |
|
|
1828 | $self->{tls_ctx}->_put_session (delete $self->{tls}) |
|
|
1829 | if $self->{tls} > 0; |
|
|
1830 | |
|
|
1831 | delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)}; |
1374 | } |
1832 | } |
1375 | |
1833 | |
1376 | sub DESTROY { |
1834 | sub DESTROY { |
1377 | my $self = shift; |
1835 | my ($self) = @_; |
1378 | |
1836 | |
1379 | $self->stoptls; |
1837 | &_freetls; |
1380 | |
1838 | |
1381 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
1839 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
1382 | |
1840 | |
1383 | if ($linger && length $self->{wbuf}) { |
1841 | if ($linger && length $self->{wbuf} && $self->{fh}) { |
1384 | my $fh = delete $self->{fh}; |
1842 | my $fh = delete $self->{fh}; |
1385 | my $wbuf = delete $self->{wbuf}; |
1843 | my $wbuf = delete $self->{wbuf}; |
1386 | |
1844 | |
1387 | my @linger; |
1845 | my @linger; |
1388 | |
1846 | |
1389 | push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub { |
1847 | push @linger, AE::io $fh, 1, sub { |
1390 | my $len = syswrite $fh, $wbuf, length $wbuf; |
1848 | my $len = syswrite $fh, $wbuf, length $wbuf; |
1391 | |
1849 | |
1392 | if ($len > 0) { |
1850 | if ($len > 0) { |
1393 | substr $wbuf, 0, $len, ""; |
1851 | substr $wbuf, 0, $len, ""; |
1394 | } else { |
1852 | } else { |
1395 | @linger = (); # end |
1853 | @linger = (); # end |
1396 | } |
1854 | } |
1397 | }); |
1855 | }; |
1398 | push @linger, AnyEvent->timer (after => $linger, cb => sub { |
1856 | push @linger, AE::timer $linger, 0, sub { |
1399 | @linger = (); |
1857 | @linger = (); |
1400 | }); |
1858 | }; |
1401 | } |
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 |
1402 | } |
1897 | } |
1403 | |
1898 | |
1404 | =item AnyEvent::Handle::TLS_CTX |
1899 | =item AnyEvent::Handle::TLS_CTX |
1405 | |
1900 | |
1406 | 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 |
1407 | default for TLS mode. |
1902 | for TLS mode. |
1408 | |
1903 | |
1409 | The context is created like this: |
1904 | The context is created by calling L<AnyEvent::TLS> without any arguments. |
1410 | |
|
|
1411 | Net::SSLeay::load_error_strings; |
|
|
1412 | Net::SSLeay::SSLeay_add_ssl_algorithms; |
|
|
1413 | Net::SSLeay::randomize; |
|
|
1414 | |
|
|
1415 | my $CTX = Net::SSLeay::CTX_new; |
|
|
1416 | |
|
|
1417 | Net::SSLeay::CTX_set_options $CTX, Net::SSLeay::OP_ALL |
|
|
1418 | |
1905 | |
1419 | =cut |
1906 | =cut |
1420 | |
1907 | |
1421 | our $TLS_CTX; |
1908 | our $TLS_CTX; |
1422 | |
1909 | |
1423 | sub TLS_CTX() { |
1910 | sub TLS_CTX() { |
1424 | $TLS_CTX || do { |
1911 | $TLS_CTX ||= do { |
1425 | require Net::SSLeay; |
1912 | require AnyEvent::TLS; |
1426 | |
1913 | |
1427 | Net::SSLeay::load_error_strings (); |
1914 | new AnyEvent::TLS |
1428 | Net::SSLeay::SSLeay_add_ssl_algorithms (); |
|
|
1429 | Net::SSLeay::randomize (); |
|
|
1430 | |
|
|
1431 | $TLS_CTX = Net::SSLeay::CTX_new (); |
|
|
1432 | |
|
|
1433 | Net::SSLeay::CTX_set_options ($TLS_CTX, Net::SSLeay::OP_ALL ()); |
|
|
1434 | |
|
|
1435 | $TLS_CTX |
|
|
1436 | } |
1915 | } |
1437 | } |
1916 | } |
1438 | |
1917 | |
1439 | =back |
1918 | =back |
|
|
1919 | |
|
|
1920 | |
|
|
1921 | =head1 NONFREQUENTLY ASKED QUESTIONS |
|
|
1922 | |
|
|
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. |
|
|
1951 | |
|
|
1952 | =item How do I read data until the other side closes the connection? |
|
|
1953 | |
|
|
1954 | If you just want to read your data into a perl scalar, the easiest way |
|
|
1955 | to achieve this is by setting an C<on_read> callback that does nothing, |
|
|
1956 | clearing the C<on_eof> callback and in the C<on_error> callback, the data |
|
|
1957 | will be in C<$_[0]{rbuf}>: |
|
|
1958 | |
|
|
1959 | $handle->on_read (sub { }); |
|
|
1960 | $handle->on_eof (undef); |
|
|
1961 | $handle->on_error (sub { |
|
|
1962 | my $data = delete $_[0]{rbuf}; |
|
|
1963 | }); |
|
|
1964 | |
|
|
1965 | The reason to use C<on_error> is that TCP connections, due to latencies |
|
|
1966 | and packets loss, might get closed quite violently with an error, when in |
|
|
1967 | fact, all data has been received. |
|
|
1968 | |
|
|
1969 | It is usually better to use acknowledgements when transferring data, |
|
|
1970 | to make sure the other side hasn't just died and you got the data |
|
|
1971 | intact. This is also one reason why so many internet protocols have an |
|
|
1972 | explicit QUIT command. |
|
|
1973 | |
|
|
1974 | =item I don't want to destroy the handle too early - how do I wait until |
|
|
1975 | all data has been written? |
|
|
1976 | |
|
|
1977 | After writing your last bits of data, set the C<on_drain> callback |
|
|
1978 | and destroy the handle in there - with the default setting of |
|
|
1979 | C<low_water_mark> this will be called precisely when all data has been |
|
|
1980 | written to the socket: |
|
|
1981 | |
|
|
1982 | $handle->push_write (...); |
|
|
1983 | $handle->on_drain (sub { |
|
|
1984 | warn "all data submitted to the kernel\n"; |
|
|
1985 | undef $handle; |
|
|
1986 | }); |
|
|
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? |
|
|
2041 | |
|
|
2042 | Well, you first need to get a server certificate and key. You have |
|
|
2043 | three options: a) ask a CA (buy one, use cacert.org etc.) b) create a |
|
|
2044 | self-signed certificate (cheap. check the search engine of your choice, |
|
|
2045 | there are many tutorials on the net) or c) make your own CA (tinyca2 is a |
|
|
2046 | nice program for that purpose). |
|
|
2047 | |
|
|
2048 | Then create a file with your private key (in PEM format, see |
|
|
2049 | L<AnyEvent::TLS>), followed by the certificate (also in PEM format). The |
|
|
2050 | file should then look like this: |
|
|
2051 | |
|
|
2052 | -----BEGIN RSA PRIVATE KEY----- |
|
|
2053 | ...header data |
|
|
2054 | ... lots of base64'y-stuff |
|
|
2055 | -----END RSA PRIVATE KEY----- |
|
|
2056 | |
|
|
2057 | -----BEGIN CERTIFICATE----- |
|
|
2058 | ... lots of base64'y-stuff |
|
|
2059 | -----END CERTIFICATE----- |
|
|
2060 | |
|
|
2061 | The important bits are the "PRIVATE KEY" and "CERTIFICATE" parts. Then |
|
|
2062 | specify this file as C<cert_file>: |
|
|
2063 | |
|
|
2064 | tcp_server undef, $port, sub { |
|
|
2065 | my ($fh) = @_; |
|
|
2066 | |
|
|
2067 | my $handle = new AnyEvent::Handle |
|
|
2068 | fh => $fh, |
|
|
2069 | tls => "accept", |
|
|
2070 | tls_ctx => { cert_file => "my-server-keycert.pem" }, |
|
|
2071 | ... |
|
|
2072 | |
|
|
2073 | When you have intermediate CA certificates that your clients might not |
|
|
2074 | know about, just append them to the C<cert_file>. |
|
|
2075 | |
|
|
2076 | =back |
|
|
2077 | |
1440 | |
2078 | |
1441 | =head1 SUBCLASSING AnyEvent::Handle |
2079 | =head1 SUBCLASSING AnyEvent::Handle |
1442 | |
2080 | |
1443 | In many cases, you might want to subclass AnyEvent::Handle. |
2081 | In many cases, you might want to subclass AnyEvent::Handle. |
1444 | |
2082 | |