1 | package AnyEvent::Handle; |
1 | package AnyEvent::Handle; |
2 | |
2 | |
3 | no warnings; |
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4 | use strict qw(subs vars); |
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5 | |
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6 | use AnyEvent (); |
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7 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
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8 | use Scalar::Util (); |
3 | use Scalar::Util (); |
9 | use Carp (); |
4 | use Carp (); |
10 | use Fcntl (); |
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11 | use Errno qw(EAGAIN EINTR); |
5 | use Errno qw(EAGAIN EINTR); |
12 | |
6 | |
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7 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
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8 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
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9 | |
13 | =head1 NAME |
10 | =head1 NAME |
14 | |
11 | |
15 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
12 | AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent |
16 | |
13 | |
17 | =cut |
14 | =cut |
18 | |
15 | |
19 | our $VERSION = 4.233; |
16 | our $VERSION = 4.91; |
20 | |
17 | |
21 | =head1 SYNOPSIS |
18 | =head1 SYNOPSIS |
22 | |
19 | |
23 | use AnyEvent; |
20 | use AnyEvent; |
24 | use AnyEvent::Handle; |
21 | use AnyEvent::Handle; |
25 | |
22 | |
26 | my $cv = AnyEvent->condvar; |
23 | my $cv = AnyEvent->condvar; |
27 | |
24 | |
28 | my $handle = |
25 | my $hdl; $hdl = new AnyEvent::Handle |
29 | AnyEvent::Handle->new ( |
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30 | fh => \*STDIN, |
26 | fh => \*STDIN, |
31 | on_eof => sub { |
27 | on_error => sub { |
32 | $cv->broadcast; |
28 | my ($hdl, $fatal, $msg) = @_; |
33 | }, |
29 | warn "got error $msg\n"; |
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30 | $hdl->destroy; |
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31 | $cv->send; |
34 | ); |
32 | ); |
35 | |
33 | |
36 | # send some request line |
34 | # send some request line |
37 | $handle->push_write ("getinfo\015\012"); |
35 | $hdl->push_write ("getinfo\015\012"); |
38 | |
36 | |
39 | # read the response line |
37 | # read the response line |
40 | $handle->push_read (line => sub { |
38 | $hdl->push_read (line => sub { |
41 | my ($handle, $line) = @_; |
39 | my ($hdl, $line) = @_; |
42 | warn "read line <$line>\n"; |
40 | warn "got line <$line>\n"; |
43 | $cv->send; |
41 | $cv->send; |
44 | }); |
42 | }); |
45 | |
43 | |
46 | $cv->recv; |
44 | $cv->recv; |
47 | |
45 | |
48 | =head1 DESCRIPTION |
46 | =head1 DESCRIPTION |
49 | |
47 | |
50 | This module is a helper module to make it easier to do event-based I/O on |
48 | 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 |
49 | filehandles. |
52 | on sockets see L<AnyEvent::Util>. |
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53 | |
50 | |
54 | The L<AnyEvent::Intro> tutorial contains some well-documented |
51 | The L<AnyEvent::Intro> tutorial contains some well-documented |
55 | AnyEvent::Handle examples. |
52 | AnyEvent::Handle examples. |
56 | |
53 | |
57 | In the following, when the documentation refers to of "bytes" then this |
54 | In the following, when the documentation refers to of "bytes" then this |
58 | means characters. As sysread and syswrite are used for all I/O, their |
55 | means characters. As sysread and syswrite are used for all I/O, their |
59 | treatment of characters applies to this module as well. |
56 | treatment of characters applies to this module as well. |
60 | |
57 | |
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58 | At the very minimum, you should specify C<fh> or C<connect>, and the |
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59 | C<on_error> callback. |
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60 | |
61 | All callbacks will be invoked with the handle object as their first |
61 | All callbacks will be invoked with the handle object as their first |
62 | argument. |
62 | argument. |
63 | |
63 | |
64 | =head1 METHODS |
64 | =head1 METHODS |
65 | |
65 | |
66 | =over 4 |
66 | =over 4 |
67 | |
67 | |
68 | =item B<new (%args)> |
68 | =item $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value... |
69 | |
69 | |
70 | The constructor supports these arguments (all as key => value pairs). |
70 | The constructor supports these arguments (all as C<< key => value >> pairs). |
71 | |
71 | |
72 | =over 4 |
72 | =over 4 |
73 | |
73 | |
74 | =item fh => $filehandle [MANDATORY] |
74 | =item fh => $filehandle [C<fh> or C<connect> MANDATORY] |
75 | |
75 | |
76 | The filehandle this L<AnyEvent::Handle> object will operate on. |
76 | The filehandle this L<AnyEvent::Handle> object will operate on. |
77 | |
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78 | NOTE: The filehandle will be set to non-blocking mode (using |
77 | NOTE: The filehandle will be set to non-blocking mode (using |
79 | C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in |
78 | C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in |
80 | that mode. |
79 | that mode. |
81 | |
80 | |
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81 | =item connect => [$host, $service] [C<fh> or C<connect> MANDATORY] |
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82 | |
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83 | Try to connect to the specified host and service (port), using |
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84 | C<AnyEvent::Socket::tcp_connect>. The C<$host> additionally becomes the |
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85 | default C<peername>. |
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86 | |
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87 | You have to specify either this parameter, or C<fh>, above. |
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88 | |
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89 | It is possible to push requests on the read and write queues, and modify |
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90 | properties of the stream, even while AnyEvent::Handle is connecting. |
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91 | |
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92 | When this parameter is specified, then the C<on_prepare>, |
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93 | C<on_connect_error> and C<on_connect> callbacks will be called under the |
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94 | appropriate circumstances: |
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95 | |
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96 | =over 4 |
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97 | |
82 | =item on_eof => $cb->($handle) |
98 | =item on_prepare => $cb->($handle) |
83 | |
99 | |
84 | Set the callback to be called when an end-of-file condition is detected, |
100 | This (rarely used) callback is called before a new connection is |
85 | i.e. in the case of a socket, when the other side has closed the |
101 | attempted, but after the file handle has been created. It could be used to |
86 | connection cleanly. |
102 | prepare the file handle with parameters required for the actual connect |
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103 | (as opposed to settings that can be changed when the connection is already |
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104 | established). |
87 | |
105 | |
88 | For sockets, this just means that the other side has stopped sending data, |
106 | The return value of this callback should be the connect timeout value in |
89 | you can still try to write data, and, in fact, one can return from the eof |
107 | seconds (or C<0>, or C<undef>, or the empty list, to indicate the default |
90 | callback and continue writing data, as only the read part has been shut |
108 | timeout is to be used). |
91 | down. |
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92 | |
109 | |
93 | While not mandatory, it is I<highly> recommended to set an eof callback, |
110 | =item on_connect => $cb->($handle, $host, $port, $retry->()) |
94 | otherwise you might end up with a closed socket while you are still |
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95 | waiting for data. |
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96 | |
111 | |
97 | If an EOF condition has been detected but no C<on_eof> callback has been |
112 | This callback is called when a connection has been successfully established. |
98 | set, then a fatal error will be raised with C<$!> set to <0>. |
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99 | |
113 | |
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114 | The actual numeric host and port (the socket peername) are passed as |
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115 | parameters, together with a retry callback. |
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116 | |
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117 | When, for some reason, the handle is not acceptable, then calling |
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118 | C<$retry> will continue with the next conenction target (in case of |
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119 | multi-homed hosts or SRV records there can be multiple connection |
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120 | endpoints). When it is called then the read and write queues, eof status, |
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121 | tls status and similar properties of the handle are being reset. |
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122 | |
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123 | In most cases, ignoring the C<$retry> parameter is the way to go. |
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124 | |
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125 | =item on_connect_error => $cb->($handle, $message) |
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126 | |
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127 | This callback is called when the conenction could not be |
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128 | established. C<$!> will contain the relevant error code, and C<$message> a |
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129 | message describing it (usually the same as C<"$!">). |
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130 | |
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131 | If this callback isn't specified, then C<on_error> will be called with a |
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132 | fatal error instead. |
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133 | |
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134 | =back |
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135 | |
100 | =item on_error => $cb->($handle, $fatal) |
136 | =item on_error => $cb->($handle, $fatal, $message) |
101 | |
137 | |
102 | This is the error callback, which is called when, well, some error |
138 | This is the error callback, which is called when, well, some error |
103 | occured, such as not being able to resolve the hostname, failure to |
139 | occured, such as not being able to resolve the hostname, failure to |
104 | connect or a read error. |
140 | connect or a read error. |
105 | |
141 | |
106 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
142 | Some errors are fatal (which is indicated by C<$fatal> being true). On |
107 | fatal errors the handle object will be shut down and will not be usable |
143 | fatal errors the handle object will be destroyed (by a call to C<< -> |
108 | (but you are free to look at the current C<< ->rbuf >>). Examples of fatal |
144 | destroy >>) after invoking the error callback (which means you are free to |
109 | errors are an EOF condition with active (but unsatisifable) read watchers |
145 | examine the handle object). Examples of fatal errors are an EOF condition |
110 | (C<EPIPE>) or I/O errors. |
146 | with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors. In |
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147 | cases where the other side can close the connection at their will it is |
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148 | often easiest to not report C<EPIPE> errors in this callback. |
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149 | |
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150 | AnyEvent::Handle tries to find an appropriate error code for you to check |
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151 | against, but in some cases (TLS errors), this does not work well. It is |
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152 | recommended to always output the C<$message> argument in human-readable |
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153 | error messages (it's usually the same as C<"$!">). |
111 | |
154 | |
112 | Non-fatal errors can be retried by simply returning, but it is recommended |
155 | Non-fatal errors can be retried by simply returning, but it is recommended |
113 | to simply ignore this parameter and instead abondon the handle object |
156 | to simply ignore this parameter and instead abondon the handle object |
114 | when this callback is invoked. Examples of non-fatal errors are timeouts |
157 | when this callback is invoked. Examples of non-fatal errors are timeouts |
115 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
158 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
116 | |
159 | |
117 | On callback entrance, the value of C<$!> contains the operating system |
160 | On callback entrance, the value of C<$!> contains the operating system |
118 | error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>). |
161 | error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or |
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162 | C<EPROTO>). |
119 | |
163 | |
120 | While not mandatory, it is I<highly> recommended to set this callback, as |
164 | While not mandatory, it is I<highly> recommended to set this callback, as |
121 | you will not be notified of errors otherwise. The default simply calls |
165 | you will not be notified of errors otherwise. The default simply calls |
122 | C<croak>. |
166 | C<croak>. |
123 | |
167 | |
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127 | and no read request is in the queue (unlike read queue callbacks, this |
171 | and no read request is in the queue (unlike read queue callbacks, this |
128 | callback will only be called when at least one octet of data is in the |
172 | callback will only be called when at least one octet of data is in the |
129 | read buffer). |
173 | read buffer). |
130 | |
174 | |
131 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
175 | To access (and remove data from) the read buffer, use the C<< ->rbuf >> |
132 | method or access the C<$handle->{rbuf}> member directly. |
176 | method or access the C<< $handle->{rbuf} >> member directly. Note that you |
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177 | must not enlarge or modify the read buffer, you can only remove data at |
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178 | the beginning from it. |
133 | |
179 | |
134 | When an EOF condition is detected then AnyEvent::Handle will first try to |
180 | When an EOF condition is detected then AnyEvent::Handle will first try to |
135 | feed all the remaining data to the queued callbacks and C<on_read> before |
181 | feed all the remaining data to the queued callbacks and C<on_read> before |
136 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
182 | calling the C<on_eof> callback. If no progress can be made, then a fatal |
137 | error will be raised (with C<$!> set to C<EPIPE>). |
183 | error will be raised (with C<$!> set to C<EPIPE>). |
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184 | |
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185 | Note that, unlike requests in the read queue, an C<on_read> callback |
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186 | doesn't mean you I<require> some data: if there is an EOF and there |
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187 | are outstanding read requests then an error will be flagged. With an |
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188 | C<on_read> callback, the C<on_eof> callback will be invoked. |
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189 | |
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190 | =item on_eof => $cb->($handle) |
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191 | |
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192 | Set the callback to be called when an end-of-file condition is detected, |
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193 | i.e. in the case of a socket, when the other side has closed the |
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194 | connection cleanly, and there are no outstanding read requests in the |
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195 | queue (if there are read requests, then an EOF counts as an unexpected |
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196 | connection close and will be flagged as an error). |
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197 | |
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198 | For sockets, this just means that the other side has stopped sending data, |
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199 | you can still try to write data, and, in fact, one can return from the EOF |
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200 | callback and continue writing data, as only the read part has been shut |
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201 | down. |
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202 | |
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203 | If an EOF condition has been detected but no C<on_eof> callback has been |
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204 | set, then a fatal error will be raised with C<$!> set to <0>. |
138 | |
205 | |
139 | =item on_drain => $cb->($handle) |
206 | =item on_drain => $cb->($handle) |
140 | |
207 | |
141 | This sets the callback that is called when the write buffer becomes empty |
208 | This sets the callback that is called when the write buffer becomes empty |
142 | (or when the callback is set and the buffer is empty already). |
209 | (or when the callback is set and the buffer is empty already). |
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232 | write data and will install a watcher that will write this data to the |
299 | write data and will install a watcher that will write this data to the |
233 | socket. No errors will be reported (this mostly matches how the operating |
300 | socket. No errors will be reported (this mostly matches how the operating |
234 | system treats outstanding data at socket close time). |
301 | system treats outstanding data at socket close time). |
235 | |
302 | |
236 | This will not work for partial TLS data that could not be encoded |
303 | This will not work for partial TLS data that could not be encoded |
237 | yet. This data will be lost. |
304 | yet. This data will be lost. Calling the C<stoptls> method in time might |
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305 | help. |
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306 | |
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307 | =item peername => $string |
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308 | |
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309 | A string used to identify the remote site - usually the DNS hostname |
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310 | (I<not> IDN!) used to create the connection, rarely the IP address. |
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311 | |
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312 | Apart from being useful in error messages, this string is also used in TLS |
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313 | peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This |
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314 | verification will be skipped when C<peername> is not specified or |
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315 | C<undef>. |
238 | |
316 | |
239 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
317 | =item tls => "accept" | "connect" | Net::SSLeay::SSL object |
240 | |
318 | |
241 | When this parameter is given, it enables TLS (SSL) mode, that means |
319 | When this parameter is given, it enables TLS (SSL) mode, that means |
242 | AnyEvent will start a TLS handshake as soon as the conenction has been |
320 | AnyEvent will start a TLS handshake as soon as the conenction has been |
243 | established and will transparently encrypt/decrypt data afterwards. |
321 | established and will transparently encrypt/decrypt data afterwards. |
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322 | |
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323 | All TLS protocol errors will be signalled as C<EPROTO>, with an |
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324 | appropriate error message. |
244 | |
325 | |
245 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
326 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
246 | automatically when you try to create a TLS handle): this module doesn't |
327 | automatically when you try to create a TLS handle): this module doesn't |
247 | have a dependency on that module, so if your module requires it, you have |
328 | have a dependency on that module, so if your module requires it, you have |
248 | to add the dependency yourself. |
329 | to add the dependency yourself. |
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252 | mode. |
333 | mode. |
253 | |
334 | |
254 | You can also provide your own TLS connection object, but you have |
335 | You can also provide your own TLS connection object, but you have |
255 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
336 | to make sure that you call either C<Net::SSLeay::set_connect_state> |
256 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
337 | or C<Net::SSLeay::set_accept_state> on it before you pass it to |
257 | AnyEvent::Handle. |
338 | AnyEvent::Handle. Also, this module will take ownership of this connection |
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339 | object. |
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340 | |
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341 | At some future point, AnyEvent::Handle might switch to another TLS |
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342 | implementation, then the option to use your own session object will go |
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343 | away. |
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344 | |
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345 | B<IMPORTANT:> since Net::SSLeay "objects" are really only integers, |
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346 | passing in the wrong integer will lead to certain crash. This most often |
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347 | happens when one uses a stylish C<< tls => 1 >> and is surprised about the |
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348 | segmentation fault. |
258 | |
349 | |
259 | See the C<< ->starttls >> method for when need to start TLS negotiation later. |
350 | See the C<< ->starttls >> method for when need to start TLS negotiation later. |
260 | |
351 | |
261 | =item tls_ctx => $ssl_ctx |
352 | =item tls_ctx => $anyevent_tls |
262 | |
353 | |
263 | Use the given C<Net::SSLeay::CTX> object to create the new TLS connection |
354 | Use the given C<AnyEvent::TLS> object to create the new TLS connection |
264 | (unless a connection object was specified directly). If this parameter is |
355 | (unless a connection object was specified directly). If this parameter is |
265 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
356 | missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>. |
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357 | |
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358 | Instead of an object, you can also specify a hash reference with C<< key |
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359 | => value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a |
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360 | new TLS context object. |
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361 | |
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362 | =item on_starttls => $cb->($handle, $success[, $error_message]) |
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363 | |
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364 | This callback will be invoked when the TLS/SSL handshake has finished. If |
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365 | C<$success> is true, then the TLS handshake succeeded, otherwise it failed |
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366 | (C<on_stoptls> will not be called in this case). |
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367 | |
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368 | The session in C<< $handle->{tls} >> can still be examined in this |
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369 | callback, even when the handshake was not successful. |
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370 | |
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371 | TLS handshake failures will not cause C<on_error> to be invoked when this |
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372 | callback is in effect, instead, the error message will be passed to C<on_starttls>. |
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373 | |
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374 | Without this callback, handshake failures lead to C<on_error> being |
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375 | called, as normal. |
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376 | |
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377 | Note that you cannot call C<starttls> right again in this callback. If you |
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378 | need to do that, start an zero-second timer instead whose callback can |
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379 | then call C<< ->starttls >> again. |
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380 | |
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381 | =item on_stoptls => $cb->($handle) |
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382 | |
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383 | When a SSLv3/TLS shutdown/close notify/EOF is detected and this callback is |
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384 | set, then it will be invoked after freeing the TLS session. If it is not, |
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385 | then a TLS shutdown condition will be treated like a normal EOF condition |
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386 | on the handle. |
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387 | |
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388 | The session in C<< $handle->{tls} >> can still be examined in this |
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389 | callback. |
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390 | |
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391 | This callback will only be called on TLS shutdowns, not when the |
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392 | underlying handle signals EOF. |
266 | |
393 | |
267 | =item json => JSON or JSON::XS object |
394 | =item json => JSON or JSON::XS object |
268 | |
395 | |
269 | This is the json coder object used by the C<json> read and write types. |
396 | This is the json coder object used by the C<json> read and write types. |
270 | |
397 | |
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273 | texts. |
400 | texts. |
274 | |
401 | |
275 | Note that you are responsible to depend on the JSON module if you want to |
402 | Note that you are responsible to depend on the JSON module if you want to |
276 | use this functionality, as AnyEvent does not have a dependency itself. |
403 | use this functionality, as AnyEvent does not have a dependency itself. |
277 | |
404 | |
278 | =item filter_r => $cb |
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279 | |
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280 | =item filter_w => $cb |
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281 | |
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282 | These exist, but are undocumented at this time. (They are used internally |
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283 | by the TLS code). |
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284 | |
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285 | =back |
405 | =back |
286 | |
406 | |
287 | =cut |
407 | =cut |
288 | |
408 | |
289 | sub new { |
409 | sub new { |
290 | my $class = shift; |
410 | my $class = shift; |
291 | |
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292 | my $self = bless { @_ }, $class; |
411 | my $self = bless { @_ }, $class; |
293 | |
412 | |
294 | $self->{fh} or Carp::croak "mandatory argument fh is missing"; |
413 | if ($self->{fh}) { |
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414 | $self->_start; |
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415 | return unless $self->{fh}; # could be gone by now |
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416 | |
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417 | } elsif ($self->{connect}) { |
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418 | require AnyEvent::Socket; |
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419 | |
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420 | $self->{peername} = $self->{connect}[0] |
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421 | unless exists $self->{peername}; |
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422 | |
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423 | $self->{_skip_drain_rbuf} = 1; |
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424 | |
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425 | { |
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426 | Scalar::Util::weaken (my $self = $self); |
|
|
427 | |
|
|
428 | $self->{_connect} = |
|
|
429 | AnyEvent::Socket::tcp_connect ( |
|
|
430 | $self->{connect}[0], |
|
|
431 | $self->{connect}[1], |
|
|
432 | sub { |
|
|
433 | my ($fh, $host, $port, $retry) = @_; |
|
|
434 | |
|
|
435 | if ($fh) { |
|
|
436 | $self->{fh} = $fh; |
|
|
437 | |
|
|
438 | delete $self->{_skip_drain_rbuf}; |
|
|
439 | $self->_start; |
|
|
440 | |
|
|
441 | $self->{on_connect} |
|
|
442 | and $self->{on_connect}($self, $host, $port, sub { |
|
|
443 | delete @$self{qw(fh _tw _ww _rw _eof _queue rbuf _wbuf tls _tls_rbuf _tls_wbuf)}; |
|
|
444 | $self->{_skip_drain_rbuf} = 1; |
|
|
445 | &$retry; |
|
|
446 | }); |
|
|
447 | |
|
|
448 | } else { |
|
|
449 | if ($self->{on_connect_error}) { |
|
|
450 | $self->{on_connect_error}($self, "$!"); |
|
|
451 | $self->destroy; |
|
|
452 | } else { |
|
|
453 | $self->_error ($!, 1); |
|
|
454 | } |
|
|
455 | } |
|
|
456 | }, |
|
|
457 | sub { |
|
|
458 | local $self->{fh} = $_[0]; |
|
|
459 | |
|
|
460 | $self->{on_prepare} |
|
|
461 | ? $self->{on_prepare}->($self) |
|
|
462 | : () |
|
|
463 | } |
|
|
464 | ); |
|
|
465 | } |
|
|
466 | |
|
|
467 | } else { |
|
|
468 | Carp::croak "AnyEvent::Handle: either an existing fh or the connect parameter must be specified"; |
|
|
469 | } |
|
|
470 | |
|
|
471 | $self |
|
|
472 | } |
|
|
473 | |
|
|
474 | sub _start { |
|
|
475 | my ($self) = @_; |
295 | |
476 | |
296 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
477 | AnyEvent::Util::fh_nonblocking $self->{fh}, 1; |
297 | |
|
|
298 | if ($self->{tls}) { |
|
|
299 | require Net::SSLeay; |
|
|
300 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}); |
|
|
301 | } |
|
|
302 | |
478 | |
303 | $self->{_activity} = AnyEvent->now; |
479 | $self->{_activity} = AnyEvent->now; |
304 | $self->_timeout; |
480 | $self->_timeout; |
305 | |
481 | |
306 | $self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain}; |
|
|
307 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
482 | $self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay}; |
308 | |
483 | |
|
|
484 | $self->starttls (delete $self->{tls}, delete $self->{tls_ctx}) |
|
|
485 | if $self->{tls}; |
|
|
486 | |
|
|
487 | $self->on_drain (delete $self->{on_drain}) if $self->{on_drain}; |
|
|
488 | |
309 | $self->start_read |
489 | $self->start_read |
310 | if $self->{on_read}; |
490 | if $self->{on_read} || @{ $self->{_queue} }; |
311 | |
491 | |
312 | $self |
492 | $self->_drain_wbuf; |
313 | } |
493 | } |
314 | |
494 | |
315 | sub _shutdown { |
495 | #sub _shutdown { |
316 | my ($self) = @_; |
496 | # my ($self) = @_; |
317 | |
497 | # |
318 | delete $self->{_tw}; |
498 | # delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)}; |
319 | delete $self->{_rw}; |
499 | # $self->{_eof} = 1; # tell starttls et. al to stop trying |
320 | delete $self->{_ww}; |
500 | # |
321 | delete $self->{fh}; |
501 | # &_freetls; |
322 | |
502 | #} |
323 | $self->stoptls; |
|
|
324 | |
|
|
325 | delete $self->{on_read}; |
|
|
326 | delete $self->{_queue}; |
|
|
327 | } |
|
|
328 | |
503 | |
329 | sub _error { |
504 | sub _error { |
330 | my ($self, $errno, $fatal) = @_; |
505 | my ($self, $errno, $fatal, $message) = @_; |
331 | |
|
|
332 | $self->_shutdown |
|
|
333 | if $fatal; |
|
|
334 | |
506 | |
335 | $! = $errno; |
507 | $! = $errno; |
|
|
508 | $message ||= "$!"; |
336 | |
509 | |
337 | if ($self->{on_error}) { |
510 | if ($self->{on_error}) { |
338 | $self->{on_error}($self, $fatal); |
511 | $self->{on_error}($self, $fatal, $message); |
339 | } else { |
512 | $self->destroy if $fatal; |
|
|
513 | } elsif ($self->{fh}) { |
|
|
514 | $self->destroy; |
340 | Carp::croak "AnyEvent::Handle uncaught error: $!"; |
515 | Carp::croak "AnyEvent::Handle uncaught error: $message"; |
341 | } |
516 | } |
342 | } |
517 | } |
343 | |
518 | |
344 | =item $fh = $handle->fh |
519 | =item $fh = $handle->fh |
345 | |
520 | |
… | |
… | |
382 | } |
557 | } |
383 | |
558 | |
384 | =item $handle->autocork ($boolean) |
559 | =item $handle->autocork ($boolean) |
385 | |
560 | |
386 | Enables or disables the current autocork behaviour (see C<autocork> |
561 | Enables or disables the current autocork behaviour (see C<autocork> |
387 | constructor argument). |
562 | constructor argument). Changes will only take effect on the next write. |
388 | |
563 | |
389 | =cut |
564 | =cut |
|
|
565 | |
|
|
566 | sub autocork { |
|
|
567 | $_[0]{autocork} = $_[1]; |
|
|
568 | } |
390 | |
569 | |
391 | =item $handle->no_delay ($boolean) |
570 | =item $handle->no_delay ($boolean) |
392 | |
571 | |
393 | Enables or disables the C<no_delay> setting (see constructor argument of |
572 | Enables or disables the C<no_delay> setting (see constructor argument of |
394 | the same name for details). |
573 | the same name for details). |
… | |
… | |
398 | sub no_delay { |
577 | sub no_delay { |
399 | $_[0]{no_delay} = $_[1]; |
578 | $_[0]{no_delay} = $_[1]; |
400 | |
579 | |
401 | eval { |
580 | eval { |
402 | local $SIG{__DIE__}; |
581 | local $SIG{__DIE__}; |
403 | setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]; |
582 | setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1] |
|
|
583 | if $_[0]{fh}; |
404 | }; |
584 | }; |
|
|
585 | } |
|
|
586 | |
|
|
587 | =item $handle->on_starttls ($cb) |
|
|
588 | |
|
|
589 | Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument). |
|
|
590 | |
|
|
591 | =cut |
|
|
592 | |
|
|
593 | sub on_starttls { |
|
|
594 | $_[0]{on_starttls} = $_[1]; |
|
|
595 | } |
|
|
596 | |
|
|
597 | =item $handle->on_stoptls ($cb) |
|
|
598 | |
|
|
599 | Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument). |
|
|
600 | |
|
|
601 | =cut |
|
|
602 | |
|
|
603 | sub on_starttls { |
|
|
604 | $_[0]{on_stoptls} = $_[1]; |
|
|
605 | } |
|
|
606 | |
|
|
607 | =item $handle->rbuf_max ($max_octets) |
|
|
608 | |
|
|
609 | Configures the C<rbuf_max> setting (C<undef> disables it). |
|
|
610 | |
|
|
611 | =cut |
|
|
612 | |
|
|
613 | sub rbuf_max { |
|
|
614 | $_[0]{rbuf_max} = $_[1]; |
405 | } |
615 | } |
406 | |
616 | |
407 | ############################################################################# |
617 | ############################################################################# |
408 | |
618 | |
409 | =item $handle->timeout ($seconds) |
619 | =item $handle->timeout ($seconds) |
… | |
… | |
414 | |
624 | |
415 | sub timeout { |
625 | sub timeout { |
416 | my ($self, $timeout) = @_; |
626 | my ($self, $timeout) = @_; |
417 | |
627 | |
418 | $self->{timeout} = $timeout; |
628 | $self->{timeout} = $timeout; |
|
|
629 | delete $self->{_tw}; |
419 | $self->_timeout; |
630 | $self->_timeout; |
420 | } |
631 | } |
421 | |
632 | |
422 | # reset the timeout watcher, as neccessary |
633 | # reset the timeout watcher, as neccessary |
423 | # also check for time-outs |
634 | # also check for time-outs |
424 | sub _timeout { |
635 | sub _timeout { |
425 | my ($self) = @_; |
636 | my ($self) = @_; |
426 | |
637 | |
427 | if ($self->{timeout}) { |
638 | if ($self->{timeout} && $self->{fh}) { |
428 | my $NOW = AnyEvent->now; |
639 | my $NOW = AnyEvent->now; |
429 | |
640 | |
430 | # when would the timeout trigger? |
641 | # when would the timeout trigger? |
431 | my $after = $self->{_activity} + $self->{timeout} - $NOW; |
642 | my $after = $self->{_activity} + $self->{timeout} - $NOW; |
432 | |
643 | |
… | |
… | |
435 | $self->{_activity} = $NOW; |
646 | $self->{_activity} = $NOW; |
436 | |
647 | |
437 | if ($self->{on_timeout}) { |
648 | if ($self->{on_timeout}) { |
438 | $self->{on_timeout}($self); |
649 | $self->{on_timeout}($self); |
439 | } else { |
650 | } else { |
440 | $self->_error (&Errno::ETIMEDOUT); |
651 | $self->_error (Errno::ETIMEDOUT); |
441 | } |
652 | } |
442 | |
653 | |
443 | # callback could have changed timeout value, optimise |
654 | # callback could have changed timeout value, optimise |
444 | return unless $self->{timeout}; |
655 | return unless $self->{timeout}; |
445 | |
656 | |
… | |
… | |
487 | my ($self, $cb) = @_; |
698 | my ($self, $cb) = @_; |
488 | |
699 | |
489 | $self->{on_drain} = $cb; |
700 | $self->{on_drain} = $cb; |
490 | |
701 | |
491 | $cb->($self) |
702 | $cb->($self) |
492 | if $cb && $self->{low_water_mark} >= length $self->{wbuf}; |
703 | if $cb && $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}); |
493 | } |
704 | } |
494 | |
705 | |
495 | =item $handle->push_write ($data) |
706 | =item $handle->push_write ($data) |
496 | |
707 | |
497 | Queues the given scalar to be written. You can push as much data as you |
708 | Queues the given scalar to be written. You can push as much data as you |
… | |
… | |
508 | Scalar::Util::weaken $self; |
719 | Scalar::Util::weaken $self; |
509 | |
720 | |
510 | my $cb = sub { |
721 | my $cb = sub { |
511 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
722 | my $len = syswrite $self->{fh}, $self->{wbuf}; |
512 | |
723 | |
513 | if ($len >= 0) { |
724 | if (defined $len) { |
514 | substr $self->{wbuf}, 0, $len, ""; |
725 | substr $self->{wbuf}, 0, $len, ""; |
515 | |
726 | |
516 | $self->{_activity} = AnyEvent->now; |
727 | $self->{_activity} = AnyEvent->now; |
517 | |
728 | |
518 | $self->{on_drain}($self) |
729 | $self->{on_drain}($self) |
519 | if $self->{low_water_mark} >= length $self->{wbuf} |
730 | if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}) |
520 | && $self->{on_drain}; |
731 | && $self->{on_drain}; |
521 | |
732 | |
522 | delete $self->{_ww} unless length $self->{wbuf}; |
733 | delete $self->{_ww} unless length $self->{wbuf}; |
523 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
734 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
524 | $self->_error ($!, 1); |
735 | $self->_error ($!, 1); |
… | |
… | |
548 | |
759 | |
549 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
760 | @_ = ($WH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_write") |
550 | ->($self, @_); |
761 | ->($self, @_); |
551 | } |
762 | } |
552 | |
763 | |
553 | if ($self->{filter_w}) { |
764 | if ($self->{tls}) { |
554 | $self->{filter_w}($self, \$_[0]); |
765 | $self->{_tls_wbuf} .= $_[0]; |
|
|
766 | &_dotls ($self) if $self->{fh}; |
555 | } else { |
767 | } else { |
556 | $self->{wbuf} .= $_[0]; |
768 | $self->{wbuf} .= $_[0]; |
557 | $self->_drain_wbuf; |
769 | $self->_drain_wbuf if $self->{fh}; |
558 | } |
770 | } |
559 | } |
771 | } |
560 | |
772 | |
561 | =item $handle->push_write (type => @args) |
773 | =item $handle->push_write (type => @args) |
562 | |
774 | |
… | |
… | |
576 | =cut |
788 | =cut |
577 | |
789 | |
578 | register_write_type netstring => sub { |
790 | register_write_type netstring => sub { |
579 | my ($self, $string) = @_; |
791 | my ($self, $string) = @_; |
580 | |
792 | |
581 | sprintf "%d:%s,", (length $string), $string |
793 | (length $string) . ":$string," |
582 | }; |
794 | }; |
583 | |
795 | |
584 | =item packstring => $format, $data |
796 | =item packstring => $format, $data |
585 | |
797 | |
586 | An octet string prefixed with an encoded length. The encoding C<$format> |
798 | An octet string prefixed with an encoded length. The encoding C<$format> |
… | |
… | |
651 | |
863 | |
652 | pack "w/a*", Storable::nfreeze ($ref) |
864 | pack "w/a*", Storable::nfreeze ($ref) |
653 | }; |
865 | }; |
654 | |
866 | |
655 | =back |
867 | =back |
|
|
868 | |
|
|
869 | =item $handle->push_shutdown |
|
|
870 | |
|
|
871 | Sometimes you know you want to close the socket after writing your data |
|
|
872 | before it was actually written. One way to do that is to replace your |
|
|
873 | C<on_drain> handler by a callback that shuts down the socket (and set |
|
|
874 | C<low_water_mark> to C<0>). This method is a shorthand for just that, and |
|
|
875 | replaces the C<on_drain> callback with: |
|
|
876 | |
|
|
877 | sub { shutdown $_[0]{fh}, 1 } # for push_shutdown |
|
|
878 | |
|
|
879 | This simply shuts down the write side and signals an EOF condition to the |
|
|
880 | the peer. |
|
|
881 | |
|
|
882 | You can rely on the normal read queue and C<on_eof> handling |
|
|
883 | afterwards. This is the cleanest way to close a connection. |
|
|
884 | |
|
|
885 | =cut |
|
|
886 | |
|
|
887 | sub push_shutdown { |
|
|
888 | my ($self) = @_; |
|
|
889 | |
|
|
890 | delete $self->{low_water_mark}; |
|
|
891 | $self->on_drain (sub { shutdown $_[0]{fh}, 1 }); |
|
|
892 | } |
656 | |
893 | |
657 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
894 | =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args) |
658 | |
895 | |
659 | This function (not method) lets you add your own types to C<push_write>. |
896 | This function (not method) lets you add your own types to C<push_write>. |
660 | Whenever the given C<type> is used, C<push_write> will invoke the code |
897 | Whenever the given C<type> is used, C<push_write> will invoke the code |
… | |
… | |
754 | =cut |
991 | =cut |
755 | |
992 | |
756 | sub _drain_rbuf { |
993 | sub _drain_rbuf { |
757 | my ($self) = @_; |
994 | my ($self) = @_; |
758 | |
995 | |
|
|
996 | # avoid recursion |
|
|
997 | return if $self->{_skip_drain_rbuf}; |
759 | local $self->{_in_drain} = 1; |
998 | local $self->{_skip_drain_rbuf} = 1; |
760 | |
|
|
761 | if ( |
|
|
762 | defined $self->{rbuf_max} |
|
|
763 | && $self->{rbuf_max} < length $self->{rbuf} |
|
|
764 | ) { |
|
|
765 | $self->_error (&Errno::ENOSPC, 1), return; |
|
|
766 | } |
|
|
767 | |
999 | |
768 | while () { |
1000 | while () { |
|
|
1001 | # we need to use a separate tls read buffer, as we must not receive data while |
|
|
1002 | # we are draining the buffer, and this can only happen with TLS. |
|
|
1003 | $self->{rbuf} .= delete $self->{_tls_rbuf} |
|
|
1004 | if exists $self->{_tls_rbuf}; |
|
|
1005 | |
769 | my $len = length $self->{rbuf}; |
1006 | my $len = length $self->{rbuf}; |
770 | |
1007 | |
771 | if (my $cb = shift @{ $self->{_queue} }) { |
1008 | if (my $cb = shift @{ $self->{_queue} }) { |
772 | unless ($cb->($self)) { |
1009 | unless ($cb->($self)) { |
773 | if ($self->{_eof}) { |
1010 | # no progress can be made |
774 | # no progress can be made (not enough data and no data forthcoming) |
1011 | # (not enough data and no data forthcoming) |
775 | $self->_error (&Errno::EPIPE, 1), return; |
1012 | $self->_error (Errno::EPIPE, 1), return |
776 | } |
1013 | if $self->{_eof}; |
777 | |
1014 | |
778 | unshift @{ $self->{_queue} }, $cb; |
1015 | unshift @{ $self->{_queue} }, $cb; |
779 | last; |
1016 | last; |
780 | } |
1017 | } |
781 | } elsif ($self->{on_read}) { |
1018 | } elsif ($self->{on_read}) { |
… | |
… | |
788 | && !@{ $self->{_queue} } # and the queue is still empty |
1025 | && !@{ $self->{_queue} } # and the queue is still empty |
789 | && $self->{on_read} # but we still have on_read |
1026 | && $self->{on_read} # but we still have on_read |
790 | ) { |
1027 | ) { |
791 | # no further data will arrive |
1028 | # no further data will arrive |
792 | # so no progress can be made |
1029 | # so no progress can be made |
793 | $self->_error (&Errno::EPIPE, 1), return |
1030 | $self->_error (Errno::EPIPE, 1), return |
794 | if $self->{_eof}; |
1031 | if $self->{_eof}; |
795 | |
1032 | |
796 | last; # more data might arrive |
1033 | last; # more data might arrive |
797 | } |
1034 | } |
798 | } else { |
1035 | } else { |
799 | # read side becomes idle |
1036 | # read side becomes idle |
800 | delete $self->{_rw}; |
1037 | delete $self->{_rw} unless $self->{tls}; |
801 | last; |
1038 | last; |
802 | } |
1039 | } |
803 | } |
1040 | } |
804 | |
1041 | |
805 | if ($self->{_eof}) { |
1042 | if ($self->{_eof}) { |
806 | if ($self->{on_eof}) { |
1043 | $self->{on_eof} |
807 | $self->{on_eof}($self) |
1044 | ? $self->{on_eof}($self) |
808 | } else { |
1045 | : $self->_error (0, 1, "Unexpected end-of-file"); |
809 | $self->_error (0, 1); |
1046 | |
810 | } |
1047 | return; |
|
|
1048 | } |
|
|
1049 | |
|
|
1050 | if ( |
|
|
1051 | defined $self->{rbuf_max} |
|
|
1052 | && $self->{rbuf_max} < length $self->{rbuf} |
|
|
1053 | ) { |
|
|
1054 | $self->_error (Errno::ENOSPC, 1), return; |
811 | } |
1055 | } |
812 | |
1056 | |
813 | # may need to restart read watcher |
1057 | # may need to restart read watcher |
814 | unless ($self->{_rw}) { |
1058 | unless ($self->{_rw}) { |
815 | $self->start_read |
1059 | $self->start_read |
… | |
… | |
827 | |
1071 | |
828 | sub on_read { |
1072 | sub on_read { |
829 | my ($self, $cb) = @_; |
1073 | my ($self, $cb) = @_; |
830 | |
1074 | |
831 | $self->{on_read} = $cb; |
1075 | $self->{on_read} = $cb; |
832 | $self->_drain_rbuf if $cb && !$self->{_in_drain}; |
1076 | $self->_drain_rbuf if $cb; |
833 | } |
1077 | } |
834 | |
1078 | |
835 | =item $handle->rbuf |
1079 | =item $handle->rbuf |
836 | |
1080 | |
837 | Returns the read buffer (as a modifiable lvalue). |
1081 | Returns the read buffer (as a modifiable lvalue). |
838 | |
1082 | |
839 | You can access the read buffer directly as the C<< ->{rbuf} >> member, if |
1083 | You can access the read buffer directly as the C<< ->{rbuf} >> |
840 | you want. |
1084 | member, if you want. However, the only operation allowed on the |
|
|
1085 | read buffer (apart from looking at it) is removing data from its |
|
|
1086 | beginning. Otherwise modifying or appending to it is not allowed and will |
|
|
1087 | lead to hard-to-track-down bugs. |
841 | |
1088 | |
842 | NOTE: The read buffer should only be used or modified if the C<on_read>, |
1089 | NOTE: The read buffer should only be used or modified if the C<on_read>, |
843 | C<push_read> or C<unshift_read> methods are used. The other read methods |
1090 | C<push_read> or C<unshift_read> methods are used. The other read methods |
844 | automatically manage the read buffer. |
1091 | automatically manage the read buffer. |
845 | |
1092 | |
… | |
… | |
886 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
1133 | $cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read") |
887 | ->($self, $cb, @_); |
1134 | ->($self, $cb, @_); |
888 | } |
1135 | } |
889 | |
1136 | |
890 | push @{ $self->{_queue} }, $cb; |
1137 | push @{ $self->{_queue} }, $cb; |
891 | $self->_drain_rbuf unless $self->{_in_drain}; |
1138 | $self->_drain_rbuf; |
892 | } |
1139 | } |
893 | |
1140 | |
894 | sub unshift_read { |
1141 | sub unshift_read { |
895 | my $self = shift; |
1142 | my $self = shift; |
896 | my $cb = pop; |
1143 | my $cb = pop; |
… | |
… | |
902 | ->($self, $cb, @_); |
1149 | ->($self, $cb, @_); |
903 | } |
1150 | } |
904 | |
1151 | |
905 | |
1152 | |
906 | unshift @{ $self->{_queue} }, $cb; |
1153 | unshift @{ $self->{_queue} }, $cb; |
907 | $self->_drain_rbuf unless $self->{_in_drain}; |
1154 | $self->_drain_rbuf; |
908 | } |
1155 | } |
909 | |
1156 | |
910 | =item $handle->push_read (type => @args, $cb) |
1157 | =item $handle->push_read (type => @args, $cb) |
911 | |
1158 | |
912 | =item $handle->unshift_read (type => @args, $cb) |
1159 | =item $handle->unshift_read (type => @args, $cb) |
… | |
… | |
1045 | return 1; |
1292 | return 1; |
1046 | } |
1293 | } |
1047 | |
1294 | |
1048 | # reject |
1295 | # reject |
1049 | if ($reject && $$rbuf =~ $reject) { |
1296 | if ($reject && $$rbuf =~ $reject) { |
1050 | $self->_error (&Errno::EBADMSG); |
1297 | $self->_error (Errno::EBADMSG); |
1051 | } |
1298 | } |
1052 | |
1299 | |
1053 | # skip |
1300 | # skip |
1054 | if ($skip && $$rbuf =~ $skip) { |
1301 | if ($skip && $$rbuf =~ $skip) { |
1055 | $data .= substr $$rbuf, 0, $+[0], ""; |
1302 | $data .= substr $$rbuf, 0, $+[0], ""; |
… | |
… | |
1071 | my ($self, $cb) = @_; |
1318 | my ($self, $cb) = @_; |
1072 | |
1319 | |
1073 | sub { |
1320 | sub { |
1074 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
1321 | unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) { |
1075 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
1322 | if ($_[0]{rbuf} =~ /[^0-9]/) { |
1076 | $self->_error (&Errno::EBADMSG); |
1323 | $self->_error (Errno::EBADMSG); |
1077 | } |
1324 | } |
1078 | return; |
1325 | return; |
1079 | } |
1326 | } |
1080 | |
1327 | |
1081 | my $len = $1; |
1328 | my $len = $1; |
… | |
… | |
1084 | my $string = $_[1]; |
1331 | my $string = $_[1]; |
1085 | $_[0]->unshift_read (chunk => 1, sub { |
1332 | $_[0]->unshift_read (chunk => 1, sub { |
1086 | if ($_[1] eq ",") { |
1333 | if ($_[1] eq ",") { |
1087 | $cb->($_[0], $string); |
1334 | $cb->($_[0], $string); |
1088 | } else { |
1335 | } else { |
1089 | $self->_error (&Errno::EBADMSG); |
1336 | $self->_error (Errno::EBADMSG); |
1090 | } |
1337 | } |
1091 | }); |
1338 | }); |
1092 | }); |
1339 | }); |
1093 | |
1340 | |
1094 | 1 |
1341 | 1 |
… | |
… | |
1100 | An octet string prefixed with an encoded length. The encoding C<$format> |
1347 | An octet string prefixed with an encoded length. The encoding C<$format> |
1101 | uses the same format as a Perl C<pack> format, but must specify a single |
1348 | uses the same format as a Perl C<pack> format, but must specify a single |
1102 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
1349 | integer only (only one of C<cCsSlLqQiInNvVjJw> is allowed, plus an |
1103 | optional C<!>, C<< < >> or C<< > >> modifier). |
1350 | optional C<!>, C<< < >> or C<< > >> modifier). |
1104 | |
1351 | |
1105 | DNS over TCP uses a prefix of C<n>, EPP uses a prefix of C<N>. |
1352 | For example, DNS over TCP uses a prefix of C<n> (2 octet network order), |
|
|
1353 | EPP uses a prefix of C<N> (4 octtes). |
1106 | |
1354 | |
1107 | Example: read a block of data prefixed by its length in BER-encoded |
1355 | Example: read a block of data prefixed by its length in BER-encoded |
1108 | format (very efficient). |
1356 | format (very efficient). |
1109 | |
1357 | |
1110 | $handle->push_read (packstring => "w", sub { |
1358 | $handle->push_read (packstring => "w", sub { |
… | |
… | |
1140 | } |
1388 | } |
1141 | }; |
1389 | }; |
1142 | |
1390 | |
1143 | =item json => $cb->($handle, $hash_or_arrayref) |
1391 | =item json => $cb->($handle, $hash_or_arrayref) |
1144 | |
1392 | |
1145 | Reads a JSON object or array, decodes it and passes it to the callback. |
1393 | Reads a JSON object or array, decodes it and passes it to the |
|
|
1394 | callback. When a parse error occurs, an C<EBADMSG> error will be raised. |
1146 | |
1395 | |
1147 | If a C<json> object was passed to the constructor, then that will be used |
1396 | If a C<json> object was passed to the constructor, then that will be used |
1148 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
1397 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
1149 | |
1398 | |
1150 | This read type uses the incremental parser available with JSON version |
1399 | This read type uses the incremental parser available with JSON version |
… | |
… | |
1159 | =cut |
1408 | =cut |
1160 | |
1409 | |
1161 | register_read_type json => sub { |
1410 | register_read_type json => sub { |
1162 | my ($self, $cb) = @_; |
1411 | my ($self, $cb) = @_; |
1163 | |
1412 | |
1164 | require JSON; |
1413 | my $json = $self->{json} ||= |
|
|
1414 | eval { require JSON::XS; JSON::XS->new->utf8 } |
|
|
1415 | || do { require JSON; JSON->new->utf8 }; |
1165 | |
1416 | |
1166 | my $data; |
1417 | my $data; |
1167 | my $rbuf = \$self->{rbuf}; |
1418 | my $rbuf = \$self->{rbuf}; |
1168 | |
1419 | |
1169 | my $json = $self->{json} ||= JSON->new->utf8; |
|
|
1170 | |
|
|
1171 | sub { |
1420 | sub { |
1172 | my $ref = $json->incr_parse ($self->{rbuf}); |
1421 | my $ref = eval { $json->incr_parse ($self->{rbuf}) }; |
1173 | |
1422 | |
1174 | if ($ref) { |
1423 | if ($ref) { |
1175 | $self->{rbuf} = $json->incr_text; |
1424 | $self->{rbuf} = $json->incr_text; |
1176 | $json->incr_text = ""; |
1425 | $json->incr_text = ""; |
1177 | $cb->($self, $ref); |
1426 | $cb->($self, $ref); |
1178 | |
1427 | |
1179 | 1 |
1428 | 1 |
|
|
1429 | } elsif ($@) { |
|
|
1430 | # error case |
|
|
1431 | $json->incr_skip; |
|
|
1432 | |
|
|
1433 | $self->{rbuf} = $json->incr_text; |
|
|
1434 | $json->incr_text = ""; |
|
|
1435 | |
|
|
1436 | $self->_error (Errno::EBADMSG); |
|
|
1437 | |
|
|
1438 | () |
1180 | } else { |
1439 | } else { |
1181 | $self->{rbuf} = ""; |
1440 | $self->{rbuf} = ""; |
|
|
1441 | |
1182 | () |
1442 | () |
1183 | } |
1443 | } |
1184 | } |
1444 | } |
1185 | }; |
1445 | }; |
1186 | |
1446 | |
… | |
… | |
1218 | # read remaining chunk |
1478 | # read remaining chunk |
1219 | $_[0]->unshift_read (chunk => $len, sub { |
1479 | $_[0]->unshift_read (chunk => $len, sub { |
1220 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1480 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1221 | $cb->($_[0], $ref); |
1481 | $cb->($_[0], $ref); |
1222 | } else { |
1482 | } else { |
1223 | $self->_error (&Errno::EBADMSG); |
1483 | $self->_error (Errno::EBADMSG); |
1224 | } |
1484 | } |
1225 | }); |
1485 | }); |
1226 | } |
1486 | } |
1227 | |
1487 | |
1228 | 1 |
1488 | 1 |
… | |
… | |
1263 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
1523 | Note that AnyEvent::Handle will automatically C<start_read> for you when |
1264 | you change the C<on_read> callback or push/unshift a read callback, and it |
1524 | you change the C<on_read> callback or push/unshift a read callback, and it |
1265 | will automatically C<stop_read> for you when neither C<on_read> is set nor |
1525 | will automatically C<stop_read> for you when neither C<on_read> is set nor |
1266 | there are any read requests in the queue. |
1526 | there are any read requests in the queue. |
1267 | |
1527 | |
|
|
1528 | These methods will have no effect when in TLS mode (as TLS doesn't support |
|
|
1529 | half-duplex connections). |
|
|
1530 | |
1268 | =cut |
1531 | =cut |
1269 | |
1532 | |
1270 | sub stop_read { |
1533 | sub stop_read { |
1271 | my ($self) = @_; |
1534 | my ($self) = @_; |
1272 | |
1535 | |
1273 | delete $self->{_rw}; |
1536 | delete $self->{_rw} unless $self->{tls}; |
1274 | } |
1537 | } |
1275 | |
1538 | |
1276 | sub start_read { |
1539 | sub start_read { |
1277 | my ($self) = @_; |
1540 | my ($self) = @_; |
1278 | |
1541 | |
1279 | unless ($self->{_rw} || $self->{_eof}) { |
1542 | unless ($self->{_rw} || $self->{_eof}) { |
1280 | Scalar::Util::weaken $self; |
1543 | Scalar::Util::weaken $self; |
1281 | |
1544 | |
1282 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
1545 | $self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub { |
1283 | my $rbuf = $self->{filter_r} ? \my $buf : \$self->{rbuf}; |
1546 | my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf}); |
1284 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
1547 | my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf; |
1285 | |
1548 | |
1286 | if ($len > 0) { |
1549 | if ($len > 0) { |
1287 | $self->{_activity} = AnyEvent->now; |
1550 | $self->{_activity} = AnyEvent->now; |
1288 | |
1551 | |
1289 | $self->{filter_r} |
1552 | if ($self->{tls}) { |
1290 | ? $self->{filter_r}($self, $rbuf) |
1553 | Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf); |
1291 | : $self->{_in_drain} || $self->_drain_rbuf; |
1554 | |
|
|
1555 | &_dotls ($self); |
|
|
1556 | } else { |
|
|
1557 | $self->_drain_rbuf; |
|
|
1558 | } |
1292 | |
1559 | |
1293 | } elsif (defined $len) { |
1560 | } elsif (defined $len) { |
1294 | delete $self->{_rw}; |
1561 | delete $self->{_rw}; |
1295 | $self->{_eof} = 1; |
1562 | $self->{_eof} = 1; |
1296 | $self->_drain_rbuf unless $self->{_in_drain}; |
1563 | $self->_drain_rbuf; |
1297 | |
1564 | |
1298 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
1565 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
1299 | return $self->_error ($!, 1); |
1566 | return $self->_error ($!, 1); |
1300 | } |
1567 | } |
1301 | }); |
1568 | }); |
1302 | } |
1569 | } |
1303 | } |
1570 | } |
1304 | |
1571 | |
|
|
1572 | our $ERROR_SYSCALL; |
|
|
1573 | our $ERROR_WANT_READ; |
|
|
1574 | |
|
|
1575 | sub _tls_error { |
|
|
1576 | my ($self, $err) = @_; |
|
|
1577 | |
|
|
1578 | return $self->_error ($!, 1) |
|
|
1579 | if $err == Net::SSLeay::ERROR_SYSCALL (); |
|
|
1580 | |
|
|
1581 | my $err =Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ()); |
|
|
1582 | |
|
|
1583 | # reduce error string to look less scary |
|
|
1584 | $err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /; |
|
|
1585 | |
|
|
1586 | if ($self->{_on_starttls}) { |
|
|
1587 | (delete $self->{_on_starttls})->($self, undef, $err); |
|
|
1588 | &_freetls; |
|
|
1589 | } else { |
|
|
1590 | &_freetls; |
|
|
1591 | $self->_error (Errno::EPROTO, 1, $err); |
|
|
1592 | } |
|
|
1593 | } |
|
|
1594 | |
|
|
1595 | # poll the write BIO and send the data if applicable |
|
|
1596 | # also decode read data if possible |
|
|
1597 | # this is basiclaly our TLS state machine |
|
|
1598 | # more efficient implementations are possible with openssl, |
|
|
1599 | # but not with the buggy and incomplete Net::SSLeay. |
1305 | sub _dotls { |
1600 | sub _dotls { |
1306 | my ($self) = @_; |
1601 | my ($self) = @_; |
1307 | |
1602 | |
1308 | my $buf; |
1603 | my $tmp; |
1309 | |
1604 | |
1310 | if (length $self->{_tls_wbuf}) { |
1605 | if (length $self->{_tls_wbuf}) { |
1311 | while ((my $len = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1606 | while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
1312 | substr $self->{_tls_wbuf}, 0, $len, ""; |
1607 | substr $self->{_tls_wbuf}, 0, $tmp, ""; |
1313 | } |
1608 | } |
1314 | } |
|
|
1315 | |
1609 | |
|
|
1610 | $tmp = Net::SSLeay::get_error ($self->{tls}, $tmp); |
|
|
1611 | return $self->_tls_error ($tmp) |
|
|
1612 | if $tmp != $ERROR_WANT_READ |
|
|
1613 | && ($tmp != $ERROR_SYSCALL || $!); |
|
|
1614 | } |
|
|
1615 | |
|
|
1616 | while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) { |
|
|
1617 | unless (length $tmp) { |
|
|
1618 | $self->{_on_starttls} |
|
|
1619 | and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ??? |
|
|
1620 | &_freetls; |
|
|
1621 | |
|
|
1622 | if ($self->{on_stoptls}) { |
|
|
1623 | $self->{on_stoptls}($self); |
|
|
1624 | return; |
|
|
1625 | } else { |
|
|
1626 | # let's treat SSL-eof as we treat normal EOF |
|
|
1627 | delete $self->{_rw}; |
|
|
1628 | $self->{_eof} = 1; |
|
|
1629 | } |
|
|
1630 | } |
|
|
1631 | |
|
|
1632 | $self->{_tls_rbuf} .= $tmp; |
|
|
1633 | $self->_drain_rbuf; |
|
|
1634 | $self->{tls} or return; # tls session might have gone away in callback |
|
|
1635 | } |
|
|
1636 | |
|
|
1637 | $tmp = Net::SSLeay::get_error ($self->{tls}, -1); |
|
|
1638 | return $self->_tls_error ($tmp) |
|
|
1639 | if $tmp != $ERROR_WANT_READ |
|
|
1640 | && ($tmp != $ERROR_SYSCALL || $!); |
|
|
1641 | |
1316 | if (length ($buf = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1642 | while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
1317 | $self->{wbuf} .= $buf; |
1643 | $self->{wbuf} .= $tmp; |
1318 | $self->_drain_wbuf; |
1644 | $self->_drain_wbuf; |
1319 | } |
1645 | } |
1320 | |
1646 | |
1321 | while (defined ($buf = Net::SSLeay::read ($self->{tls}))) { |
1647 | $self->{_on_starttls} |
1322 | if (length $buf) { |
1648 | and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK () |
1323 | $self->{rbuf} .= $buf; |
1649 | and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established"); |
1324 | $self->_drain_rbuf unless $self->{_in_drain}; |
|
|
1325 | } else { |
|
|
1326 | # let's treat SSL-eof as we treat normal EOF |
|
|
1327 | $self->{_eof} = 1; |
|
|
1328 | $self->_shutdown; |
|
|
1329 | return; |
|
|
1330 | } |
|
|
1331 | } |
|
|
1332 | |
|
|
1333 | my $err = Net::SSLeay::get_error ($self->{tls}, -1); |
|
|
1334 | |
|
|
1335 | if ($err!= Net::SSLeay::ERROR_WANT_READ ()) { |
|
|
1336 | if ($err == Net::SSLeay::ERROR_SYSCALL ()) { |
|
|
1337 | return $self->_error ($!, 1); |
|
|
1338 | } elsif ($err == Net::SSLeay::ERROR_SSL ()) { |
|
|
1339 | return $self->_error (&Errno::EIO, 1); |
|
|
1340 | } |
|
|
1341 | |
|
|
1342 | # all others are fine for our purposes |
|
|
1343 | } |
|
|
1344 | } |
1650 | } |
1345 | |
1651 | |
1346 | =item $handle->starttls ($tls[, $tls_ctx]) |
1652 | =item $handle->starttls ($tls[, $tls_ctx]) |
1347 | |
1653 | |
1348 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
1654 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
1349 | object is created, you can also do that at a later time by calling |
1655 | object is created, you can also do that at a later time by calling |
1350 | C<starttls>. |
1656 | C<starttls>. |
1351 | |
1657 | |
|
|
1658 | Starting TLS is currently an asynchronous operation - when you push some |
|
|
1659 | write data and then call C<< ->starttls >> then TLS negotiation will start |
|
|
1660 | immediately, after which the queued write data is then sent. |
|
|
1661 | |
1352 | The first argument is the same as the C<tls> constructor argument (either |
1662 | The first argument is the same as the C<tls> constructor argument (either |
1353 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
1663 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
1354 | |
1664 | |
1355 | The second argument is the optional C<Net::SSLeay::CTX> object that is |
1665 | The second argument is the optional C<AnyEvent::TLS> object that is used |
1356 | used when AnyEvent::Handle has to create its own TLS connection object. |
1666 | when AnyEvent::Handle has to create its own TLS connection object, or |
|
|
1667 | a hash reference with C<< key => value >> pairs that will be used to |
|
|
1668 | construct a new context. |
1357 | |
1669 | |
1358 | The TLS connection object will end up in C<< $handle->{tls} >> after this |
1670 | The TLS connection object will end up in C<< $handle->{tls} >>, the TLS |
1359 | call and can be used or changed to your liking. Note that the handshake |
1671 | context in C<< $handle->{tls_ctx} >> after this call and can be used or |
1360 | might have already started when this function returns. |
1672 | changed to your liking. Note that the handshake might have already started |
|
|
1673 | when this function returns. |
1361 | |
1674 | |
|
|
1675 | Due to bugs in OpenSSL, it might or might not be possible to do multiple |
|
|
1676 | handshakes on the same stream. Best do not attempt to use the stream after |
|
|
1677 | stopping TLS. |
|
|
1678 | |
1362 | =cut |
1679 | =cut |
|
|
1680 | |
|
|
1681 | our %TLS_CACHE; #TODO not yet documented, should we? |
1363 | |
1682 | |
1364 | sub starttls { |
1683 | sub starttls { |
1365 | my ($self, $ssl, $ctx) = @_; |
1684 | my ($self, $tls, $ctx) = @_; |
1366 | |
1685 | |
1367 | $self->stoptls; |
1686 | Carp::croak "It is an error to call starttls on an AnyEvent::Handle object while TLS is already active, caught" |
|
|
1687 | if $self->{tls}; |
1368 | |
1688 | |
1369 | if ($ssl eq "accept") { |
1689 | $self->{tls} = $tls; |
1370 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
1690 | $self->{tls_ctx} = $ctx if @_ > 2; |
1371 | Net::SSLeay::set_accept_state ($ssl); |
1691 | |
1372 | } elsif ($ssl eq "connect") { |
1692 | return unless $self->{fh}; |
1373 | $ssl = Net::SSLeay::new ($ctx || TLS_CTX ()); |
1693 | |
1374 | Net::SSLeay::set_connect_state ($ssl); |
1694 | require Net::SSLeay; |
|
|
1695 | |
|
|
1696 | $ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL (); |
|
|
1697 | $ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ (); |
|
|
1698 | |
|
|
1699 | $tls = $self->{tls}; |
|
|
1700 | $ctx = $self->{tls_ctx}; |
|
|
1701 | |
|
|
1702 | local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session |
|
|
1703 | |
|
|
1704 | if ("HASH" eq ref $ctx) { |
|
|
1705 | require AnyEvent::TLS; |
|
|
1706 | |
|
|
1707 | if ($ctx->{cache}) { |
|
|
1708 | my $key = $ctx+0; |
|
|
1709 | $ctx = $TLS_CACHE{$key} ||= new AnyEvent::TLS %$ctx; |
|
|
1710 | } else { |
|
|
1711 | $ctx = new AnyEvent::TLS %$ctx; |
|
|
1712 | } |
|
|
1713 | } |
1375 | } |
1714 | |
1376 | |
1715 | $self->{tls_ctx} = $ctx || TLS_CTX (); |
1377 | $self->{tls} = $ssl; |
1716 | $self->{tls} = $tls = $self->{tls_ctx}->_get_session ($tls, $self, $self->{peername}); |
1378 | |
1717 | |
1379 | # basically, this is deep magic (because SSL_read should have the same issues) |
1718 | # basically, this is deep magic (because SSL_read should have the same issues) |
1380 | # but the openssl maintainers basically said: "trust us, it just works". |
1719 | # but the openssl maintainers basically said: "trust us, it just works". |
1381 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
1720 | # (unfortunately, we have to hardcode constants because the abysmally misdesigned |
1382 | # and mismaintained ssleay-module doesn't even offer them). |
1721 | # and mismaintained ssleay-module doesn't even offer them). |
1383 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
1722 | # http://www.mail-archive.com/openssl-dev@openssl.org/msg22420.html |
1384 | # |
1723 | # |
1385 | # in short: this is a mess. |
1724 | # in short: this is a mess. |
1386 | # |
1725 | # |
1387 | # note that we do not try to kepe the length constant between writes as we are required to do. |
1726 | # note that we do not try to keep the length constant between writes as we are required to do. |
1388 | # we assume that most (but not all) of this insanity only applies to non-blocking cases, |
1727 | # we assume that most (but not all) of this insanity only applies to non-blocking cases, |
1389 | # and we drive openssl fully in blocking mode here. |
1728 | # and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to |
|
|
1729 | # have identity issues in that area. |
1390 | Net::SSLeay::CTX_set_mode ($self->{tls}, |
1730 | # Net::SSLeay::CTX_set_mode ($ssl, |
1391 | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
1731 | # (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1) |
1392 | | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
1732 | # | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2)); |
|
|
1733 | Net::SSLeay::CTX_set_mode ($tls, 1|2); |
1393 | |
1734 | |
1394 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1735 | $self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1395 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1736 | $self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ()); |
1396 | |
1737 | |
|
|
1738 | Net::SSLeay::BIO_write ($self->{_rbio}, delete $self->{rbuf}); |
|
|
1739 | |
1397 | Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio}); |
1740 | Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio}); |
1398 | |
1741 | |
1399 | $self->{filter_w} = sub { |
1742 | $self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) } |
1400 | $_[0]{_tls_wbuf} .= ${$_[1]}; |
1743 | if $self->{on_starttls}; |
1401 | &_dotls; |
1744 | |
1402 | }; |
1745 | &_dotls; # need to trigger the initial handshake |
1403 | $self->{filter_r} = sub { |
1746 | $self->start_read; # make sure we actually do read |
1404 | Net::SSLeay::BIO_write ($_[0]{_rbio}, ${$_[1]}); |
|
|
1405 | &_dotls; |
|
|
1406 | }; |
|
|
1407 | } |
1747 | } |
1408 | |
1748 | |
1409 | =item $handle->stoptls |
1749 | =item $handle->stoptls |
1410 | |
1750 | |
1411 | Destroys the SSL connection, if any. Partial read or write data will be |
1751 | Shuts down the SSL connection - this makes a proper EOF handshake by |
1412 | lost. |
1752 | sending a close notify to the other side, but since OpenSSL doesn't |
|
|
1753 | support non-blocking shut downs, it is not guarenteed that you can re-use |
|
|
1754 | the stream afterwards. |
1413 | |
1755 | |
1414 | =cut |
1756 | =cut |
1415 | |
1757 | |
1416 | sub stoptls { |
1758 | sub stoptls { |
1417 | my ($self) = @_; |
1759 | my ($self) = @_; |
1418 | |
1760 | |
1419 | Net::SSLeay::free (delete $self->{tls}) if $self->{tls}; |
1761 | if ($self->{tls}) { |
|
|
1762 | Net::SSLeay::shutdown ($self->{tls}); |
1420 | |
1763 | |
1421 | delete $self->{_rbio}; |
1764 | &_dotls; |
1422 | delete $self->{_wbio}; |
1765 | |
1423 | delete $self->{_tls_wbuf}; |
1766 | # # we don't give a shit. no, we do, but we can't. no...#d# |
1424 | delete $self->{filter_r}; |
1767 | # # we, we... have to use openssl :/#d# |
1425 | delete $self->{filter_w}; |
1768 | # &_freetls;#d# |
|
|
1769 | } |
|
|
1770 | } |
|
|
1771 | |
|
|
1772 | sub _freetls { |
|
|
1773 | my ($self) = @_; |
|
|
1774 | |
|
|
1775 | return unless $self->{tls}; |
|
|
1776 | |
|
|
1777 | $self->{tls_ctx}->_put_session (delete $self->{tls}) |
|
|
1778 | if $self->{tls} > 0; |
|
|
1779 | |
|
|
1780 | delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)}; |
1426 | } |
1781 | } |
1427 | |
1782 | |
1428 | sub DESTROY { |
1783 | sub DESTROY { |
1429 | my $self = shift; |
1784 | my ($self) = @_; |
1430 | |
1785 | |
1431 | $self->stoptls; |
1786 | &_freetls; |
1432 | |
1787 | |
1433 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
1788 | my $linger = exists $self->{linger} ? $self->{linger} : 3600; |
1434 | |
1789 | |
1435 | if ($linger && length $self->{wbuf}) { |
1790 | if ($linger && length $self->{wbuf} && $self->{fh}) { |
1436 | my $fh = delete $self->{fh}; |
1791 | my $fh = delete $self->{fh}; |
1437 | my $wbuf = delete $self->{wbuf}; |
1792 | my $wbuf = delete $self->{wbuf}; |
1438 | |
1793 | |
1439 | my @linger; |
1794 | my @linger; |
1440 | |
1795 | |
… | |
… | |
1451 | @linger = (); |
1806 | @linger = (); |
1452 | }); |
1807 | }); |
1453 | } |
1808 | } |
1454 | } |
1809 | } |
1455 | |
1810 | |
|
|
1811 | =item $handle->destroy |
|
|
1812 | |
|
|
1813 | Shuts down the handle object as much as possible - this call ensures that |
|
|
1814 | no further callbacks will be invoked and as many resources as possible |
|
|
1815 | will be freed. Any method you will call on the handle object after |
|
|
1816 | destroying it in this way will be silently ignored (and it will return the |
|
|
1817 | empty list). |
|
|
1818 | |
|
|
1819 | Normally, you can just "forget" any references to an AnyEvent::Handle |
|
|
1820 | object and it will simply shut down. This works in fatal error and EOF |
|
|
1821 | callbacks, as well as code outside. It does I<NOT> work in a read or write |
|
|
1822 | callback, so when you want to destroy the AnyEvent::Handle object from |
|
|
1823 | within such an callback. You I<MUST> call C<< ->destroy >> explicitly in |
|
|
1824 | that case. |
|
|
1825 | |
|
|
1826 | Destroying the handle object in this way has the advantage that callbacks |
|
|
1827 | will be removed as well, so if those are the only reference holders (as |
|
|
1828 | is common), then one doesn't need to do anything special to break any |
|
|
1829 | reference cycles. |
|
|
1830 | |
|
|
1831 | The handle might still linger in the background and write out remaining |
|
|
1832 | data, as specified by the C<linger> option, however. |
|
|
1833 | |
|
|
1834 | =cut |
|
|
1835 | |
|
|
1836 | sub destroy { |
|
|
1837 | my ($self) = @_; |
|
|
1838 | |
|
|
1839 | $self->DESTROY; |
|
|
1840 | %$self = (); |
|
|
1841 | bless $self, "AnyEvent::Handle::destroyed"; |
|
|
1842 | } |
|
|
1843 | |
|
|
1844 | sub AnyEvent::Handle::destroyed::AUTOLOAD { |
|
|
1845 | #nop |
|
|
1846 | } |
|
|
1847 | |
1456 | =item AnyEvent::Handle::TLS_CTX |
1848 | =item AnyEvent::Handle::TLS_CTX |
1457 | |
1849 | |
1458 | This function creates and returns the Net::SSLeay::CTX object used by |
1850 | This function creates and returns the AnyEvent::TLS object used by default |
1459 | default for TLS mode. |
1851 | for TLS mode. |
1460 | |
1852 | |
1461 | The context is created like this: |
1853 | The context is created by calling L<AnyEvent::TLS> without any arguments. |
1462 | |
|
|
1463 | Net::SSLeay::load_error_strings; |
|
|
1464 | Net::SSLeay::SSLeay_add_ssl_algorithms; |
|
|
1465 | Net::SSLeay::randomize; |
|
|
1466 | |
|
|
1467 | my $CTX = Net::SSLeay::CTX_new; |
|
|
1468 | |
|
|
1469 | Net::SSLeay::CTX_set_options $CTX, Net::SSLeay::OP_ALL |
|
|
1470 | |
1854 | |
1471 | =cut |
1855 | =cut |
1472 | |
1856 | |
1473 | our $TLS_CTX; |
1857 | our $TLS_CTX; |
1474 | |
1858 | |
1475 | sub TLS_CTX() { |
1859 | sub TLS_CTX() { |
1476 | $TLS_CTX || do { |
1860 | $TLS_CTX ||= do { |
1477 | require Net::SSLeay; |
1861 | require AnyEvent::TLS; |
1478 | |
1862 | |
1479 | Net::SSLeay::load_error_strings (); |
1863 | new AnyEvent::TLS |
1480 | Net::SSLeay::SSLeay_add_ssl_algorithms (); |
|
|
1481 | Net::SSLeay::randomize (); |
|
|
1482 | |
|
|
1483 | $TLS_CTX = Net::SSLeay::CTX_new (); |
|
|
1484 | |
|
|
1485 | Net::SSLeay::CTX_set_options ($TLS_CTX, Net::SSLeay::OP_ALL ()); |
|
|
1486 | |
|
|
1487 | $TLS_CTX |
|
|
1488 | } |
1864 | } |
1489 | } |
1865 | } |
1490 | |
1866 | |
1491 | =back |
1867 | =back |
|
|
1868 | |
|
|
1869 | |
|
|
1870 | =head1 NONFREQUENTLY ASKED QUESTIONS |
|
|
1871 | |
|
|
1872 | =over 4 |
|
|
1873 | |
|
|
1874 | =item I C<undef> the AnyEvent::Handle reference inside my callback and |
|
|
1875 | still get further invocations! |
|
|
1876 | |
|
|
1877 | That's because AnyEvent::Handle keeps a reference to itself when handling |
|
|
1878 | read or write callbacks. |
|
|
1879 | |
|
|
1880 | It is only safe to "forget" the reference inside EOF or error callbacks, |
|
|
1881 | from within all other callbacks, you need to explicitly call the C<< |
|
|
1882 | ->destroy >> method. |
|
|
1883 | |
|
|
1884 | =item I get different callback invocations in TLS mode/Why can't I pause |
|
|
1885 | reading? |
|
|
1886 | |
|
|
1887 | Unlike, say, TCP, TLS connections do not consist of two independent |
|
|
1888 | communication channels, one for each direction. Or put differently. The |
|
|
1889 | read and write directions are not independent of each other: you cannot |
|
|
1890 | write data unless you are also prepared to read, and vice versa. |
|
|
1891 | |
|
|
1892 | This can mean than, in TLS mode, you might get C<on_error> or C<on_eof> |
|
|
1893 | callback invocations when you are not expecting any read data - the reason |
|
|
1894 | is that AnyEvent::Handle always reads in TLS mode. |
|
|
1895 | |
|
|
1896 | During the connection, you have to make sure that you always have a |
|
|
1897 | non-empty read-queue, or an C<on_read> watcher. At the end of the |
|
|
1898 | connection (or when you no longer want to use it) you can call the |
|
|
1899 | C<destroy> method. |
|
|
1900 | |
|
|
1901 | =item How do I read data until the other side closes the connection? |
|
|
1902 | |
|
|
1903 | If you just want to read your data into a perl scalar, the easiest way |
|
|
1904 | to achieve this is by setting an C<on_read> callback that does nothing, |
|
|
1905 | clearing the C<on_eof> callback and in the C<on_error> callback, the data |
|
|
1906 | will be in C<$_[0]{rbuf}>: |
|
|
1907 | |
|
|
1908 | $handle->on_read (sub { }); |
|
|
1909 | $handle->on_eof (undef); |
|
|
1910 | $handle->on_error (sub { |
|
|
1911 | my $data = delete $_[0]{rbuf}; |
|
|
1912 | }); |
|
|
1913 | |
|
|
1914 | The reason to use C<on_error> is that TCP connections, due to latencies |
|
|
1915 | and packets loss, might get closed quite violently with an error, when in |
|
|
1916 | fact, all data has been received. |
|
|
1917 | |
|
|
1918 | It is usually better to use acknowledgements when transferring data, |
|
|
1919 | to make sure the other side hasn't just died and you got the data |
|
|
1920 | intact. This is also one reason why so many internet protocols have an |
|
|
1921 | explicit QUIT command. |
|
|
1922 | |
|
|
1923 | =item I don't want to destroy the handle too early - how do I wait until |
|
|
1924 | all data has been written? |
|
|
1925 | |
|
|
1926 | After writing your last bits of data, set the C<on_drain> callback |
|
|
1927 | and destroy the handle in there - with the default setting of |
|
|
1928 | C<low_water_mark> this will be called precisely when all data has been |
|
|
1929 | written to the socket: |
|
|
1930 | |
|
|
1931 | $handle->push_write (...); |
|
|
1932 | $handle->on_drain (sub { |
|
|
1933 | warn "all data submitted to the kernel\n"; |
|
|
1934 | undef $handle; |
|
|
1935 | }); |
|
|
1936 | |
|
|
1937 | If you just want to queue some data and then signal EOF to the other side, |
|
|
1938 | consider using C<< ->push_shutdown >> instead. |
|
|
1939 | |
|
|
1940 | =item I want to contact a TLS/SSL server, I don't care about security. |
|
|
1941 | |
|
|
1942 | If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS, |
|
|
1943 | simply connect to it and then create the AnyEvent::Handle with the C<tls> |
|
|
1944 | parameter: |
|
|
1945 | |
|
|
1946 | tcp_connect $host, $port, sub { |
|
|
1947 | my ($fh) = @_; |
|
|
1948 | |
|
|
1949 | my $handle = new AnyEvent::Handle |
|
|
1950 | fh => $fh, |
|
|
1951 | tls => "connect", |
|
|
1952 | on_error => sub { ... }; |
|
|
1953 | |
|
|
1954 | $handle->push_write (...); |
|
|
1955 | }; |
|
|
1956 | |
|
|
1957 | =item I want to contact a TLS/SSL server, I do care about security. |
|
|
1958 | |
|
|
1959 | Then you should additionally enable certificate verification, including |
|
|
1960 | peername verification, if the protocol you use supports it (see |
|
|
1961 | L<AnyEvent::TLS>, C<verify_peername>). |
|
|
1962 | |
|
|
1963 | E.g. for HTTPS: |
|
|
1964 | |
|
|
1965 | tcp_connect $host, $port, sub { |
|
|
1966 | my ($fh) = @_; |
|
|
1967 | |
|
|
1968 | my $handle = new AnyEvent::Handle |
|
|
1969 | fh => $fh, |
|
|
1970 | peername => $host, |
|
|
1971 | tls => "connect", |
|
|
1972 | tls_ctx => { verify => 1, verify_peername => "https" }, |
|
|
1973 | ... |
|
|
1974 | |
|
|
1975 | Note that you must specify the hostname you connected to (or whatever |
|
|
1976 | "peername" the protocol needs) as the C<peername> argument, otherwise no |
|
|
1977 | peername verification will be done. |
|
|
1978 | |
|
|
1979 | The above will use the system-dependent default set of trusted CA |
|
|
1980 | certificates. If you want to check against a specific CA, add the |
|
|
1981 | C<ca_file> (or C<ca_cert>) arguments to C<tls_ctx>: |
|
|
1982 | |
|
|
1983 | tls_ctx => { |
|
|
1984 | verify => 1, |
|
|
1985 | verify_peername => "https", |
|
|
1986 | ca_file => "my-ca-cert.pem", |
|
|
1987 | }, |
|
|
1988 | |
|
|
1989 | =item I want to create a TLS/SSL server, how do I do that? |
|
|
1990 | |
|
|
1991 | Well, you first need to get a server certificate and key. You have |
|
|
1992 | three options: a) ask a CA (buy one, use cacert.org etc.) b) create a |
|
|
1993 | self-signed certificate (cheap. check the search engine of your choice, |
|
|
1994 | there are many tutorials on the net) or c) make your own CA (tinyca2 is a |
|
|
1995 | nice program for that purpose). |
|
|
1996 | |
|
|
1997 | Then create a file with your private key (in PEM format, see |
|
|
1998 | L<AnyEvent::TLS>), followed by the certificate (also in PEM format). The |
|
|
1999 | file should then look like this: |
|
|
2000 | |
|
|
2001 | -----BEGIN RSA PRIVATE KEY----- |
|
|
2002 | ...header data |
|
|
2003 | ... lots of base64'y-stuff |
|
|
2004 | -----END RSA PRIVATE KEY----- |
|
|
2005 | |
|
|
2006 | -----BEGIN CERTIFICATE----- |
|
|
2007 | ... lots of base64'y-stuff |
|
|
2008 | -----END CERTIFICATE----- |
|
|
2009 | |
|
|
2010 | The important bits are the "PRIVATE KEY" and "CERTIFICATE" parts. Then |
|
|
2011 | specify this file as C<cert_file>: |
|
|
2012 | |
|
|
2013 | tcp_server undef, $port, sub { |
|
|
2014 | my ($fh) = @_; |
|
|
2015 | |
|
|
2016 | my $handle = new AnyEvent::Handle |
|
|
2017 | fh => $fh, |
|
|
2018 | tls => "accept", |
|
|
2019 | tls_ctx => { cert_file => "my-server-keycert.pem" }, |
|
|
2020 | ... |
|
|
2021 | |
|
|
2022 | When you have intermediate CA certificates that your clients might not |
|
|
2023 | know about, just append them to the C<cert_file>. |
|
|
2024 | |
|
|
2025 | =back |
|
|
2026 | |
1492 | |
2027 | |
1493 | =head1 SUBCLASSING AnyEvent::Handle |
2028 | =head1 SUBCLASSING AnyEvent::Handle |
1494 | |
2029 | |
1495 | In many cases, you might want to subclass AnyEvent::Handle. |
2030 | In many cases, you might want to subclass AnyEvent::Handle. |
1496 | |
2031 | |