… | |
… | |
11 | |
11 | |
12 | my $hdl; $hdl = new AnyEvent::Handle |
12 | my $hdl; $hdl = new AnyEvent::Handle |
13 | fh => \*STDIN, |
13 | fh => \*STDIN, |
14 | on_error => sub { |
14 | on_error => sub { |
15 | my ($hdl, $fatal, $msg) = @_; |
15 | my ($hdl, $fatal, $msg) = @_; |
16 | AE::log error => "got error $msg\n"; |
16 | AE::log error => $msg; |
17 | $hdl->destroy; |
17 | $hdl->destroy; |
18 | $cv->send; |
18 | $cv->send; |
19 | }; |
19 | }; |
20 | |
20 | |
21 | # send some request line |
21 | # send some request line |
… | |
… | |
53 | package AnyEvent::Handle; |
53 | package AnyEvent::Handle; |
54 | |
54 | |
55 | use Scalar::Util (); |
55 | use Scalar::Util (); |
56 | use List::Util (); |
56 | use List::Util (); |
57 | use Carp (); |
57 | use Carp (); |
58 | use Errno qw(EAGAIN EINTR); |
58 | use Errno qw(EAGAIN EWOULDBLOCK EINTR); |
59 | |
59 | |
60 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
60 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
61 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
61 | use AnyEvent::Util qw(WSAEWOULDBLOCK); |
62 | |
62 | |
63 | our $VERSION = $AnyEvent::VERSION; |
63 | our $VERSION = $AnyEvent::VERSION; |
… | |
… | |
128 | =item on_connect => $cb->($handle, $host, $port, $retry->()) |
128 | =item on_connect => $cb->($handle, $host, $port, $retry->()) |
129 | |
129 | |
130 | This callback is called when a connection has been successfully established. |
130 | This callback is called when a connection has been successfully established. |
131 | |
131 | |
132 | The peer's numeric host and port (the socket peername) are passed as |
132 | The peer's numeric host and port (the socket peername) are passed as |
133 | parameters, together with a retry callback. |
133 | parameters, together with a retry callback. At the time it is called the |
|
|
134 | read and write queues, EOF status, TLS status and similar properties of |
|
|
135 | the handle will have been reset. |
134 | |
136 | |
135 | If, for some reason, the handle is not acceptable, calling C<$retry> |
137 | If, for some reason, the handle is not acceptable, calling C<$retry> will |
136 | will continue with the next connection target (in case of multi-homed |
138 | continue with the next connection target (in case of multi-homed hosts or |
137 | hosts or SRV records there can be multiple connection endpoints). At the |
139 | SRV records there can be multiple connection endpoints). The C<$retry> |
138 | time it is called the read and write queues, eof status, tls status and |
140 | callback can be invoked after the connect callback returns, i.e. one can |
139 | similar properties of the handle will have been reset. |
141 | start a handshake and then decide to retry with the next host if the |
|
|
142 | handshake fails. |
140 | |
143 | |
141 | In most cases, you should ignore the C<$retry> parameter. |
144 | In most cases, you should ignore the C<$retry> parameter. |
142 | |
145 | |
143 | =item on_connect_error => $cb->($handle, $message) |
146 | =item on_connect_error => $cb->($handle, $message) |
144 | |
147 | |
… | |
… | |
164 | with active (but unsatisfiable) read watchers (C<EPIPE>) or I/O errors. In |
167 | with active (but unsatisfiable) read watchers (C<EPIPE>) or I/O errors. In |
165 | cases where the other side can close the connection at will, it is |
168 | cases where the other side can close the connection at will, it is |
166 | often easiest to not report C<EPIPE> errors in this callback. |
169 | often easiest to not report C<EPIPE> errors in this callback. |
167 | |
170 | |
168 | AnyEvent::Handle tries to find an appropriate error code for you to check |
171 | AnyEvent::Handle tries to find an appropriate error code for you to check |
169 | against, but in some cases (TLS errors), this does not work well. It is |
172 | against, but in some cases (TLS errors), this does not work well. |
170 | recommended to always output the C<$message> argument in human-readable |
173 | |
171 | error messages (it's usually the same as C<"$!">). |
174 | If you report the error to the user, it is recommended to always output |
|
|
175 | the C<$message> argument in human-readable error messages (you don't need |
|
|
176 | to report C<"$!"> if you report C<$message>). |
|
|
177 | |
|
|
178 | If you want to react programmatically to the error, then looking at C<$!> |
|
|
179 | and comparing it against some of the documented C<Errno> values is usually |
|
|
180 | better than looking at the C<$message>. |
172 | |
181 | |
173 | Non-fatal errors can be retried by returning, but it is recommended |
182 | Non-fatal errors can be retried by returning, but it is recommended |
174 | to simply ignore this parameter and instead abondon the handle object |
183 | to simply ignore this parameter and instead abondon the handle object |
175 | when this callback is invoked. Examples of non-fatal errors are timeouts |
184 | when this callback is invoked. Examples of non-fatal errors are timeouts |
176 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
185 | C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>). |
… | |
… | |
224 | If an EOF condition has been detected but no C<on_eof> callback has been |
233 | If an EOF condition has been detected but no C<on_eof> callback has been |
225 | set, then a fatal error will be raised with C<$!> set to <0>. |
234 | set, then a fatal error will be raised with C<$!> set to <0>. |
226 | |
235 | |
227 | =item on_drain => $cb->($handle) |
236 | =item on_drain => $cb->($handle) |
228 | |
237 | |
229 | This sets the callback that is called when the write buffer becomes empty |
238 | This sets the callback that is called once when the write buffer becomes |
230 | (or immediately if the buffer is empty already). |
239 | empty (and immediately when the handle object is created). |
231 | |
240 | |
232 | To append to the write buffer, use the C<< ->push_write >> method. |
241 | To append to the write buffer, use the C<< ->push_write >> method. |
233 | |
242 | |
234 | This callback is useful when you don't want to put all of your write data |
243 | This callback is useful when you don't want to put all of your write data |
235 | into the queue at once, for example, when you want to write the contents |
244 | into the queue at once, for example, when you want to write the contents |
… | |
… | |
417 | appropriate error message. |
426 | appropriate error message. |
418 | |
427 | |
419 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
428 | TLS mode requires Net::SSLeay to be installed (it will be loaded |
420 | automatically when you try to create a TLS handle): this module doesn't |
429 | automatically when you try to create a TLS handle): this module doesn't |
421 | have a dependency on that module, so if your module requires it, you have |
430 | have a dependency on that module, so if your module requires it, you have |
422 | to add the dependency yourself. |
431 | to add the dependency yourself. If Net::SSLeay cannot be loaded or is too |
|
|
432 | old, you get an C<EPROTO> error. |
423 | |
433 | |
424 | Unlike TCP, TLS has a server and client side: for the TLS server side, use |
434 | Unlike TCP, TLS has a server and client side: for the TLS server side, use |
425 | C<accept>, and for the TLS client side of a connection, use C<connect> |
435 | C<accept>, and for the TLS client side of a connection, use C<connect> |
426 | mode. |
436 | mode. |
427 | |
437 | |
… | |
… | |
483 | callback. |
493 | callback. |
484 | |
494 | |
485 | This callback will only be called on TLS shutdowns, not when the |
495 | This callback will only be called on TLS shutdowns, not when the |
486 | underlying handle signals EOF. |
496 | underlying handle signals EOF. |
487 | |
497 | |
488 | =item json => JSON or JSON::XS object |
498 | =item json => L<JSON>, L<JSON::PP> or L<JSON::XS> object |
489 | |
499 | |
490 | This is the json coder object used by the C<json> read and write types. |
500 | This is the json coder object used by the C<json> read and write types. |
491 | |
501 | |
492 | If you don't supply it, then AnyEvent::Handle will create and use a |
502 | If you don't supply it, then AnyEvent::Handle will create and use a |
493 | suitable one (on demand), which will write and expect UTF-8 encoded JSON |
503 | suitable one (on demand), which will write and expect UTF-8 encoded |
|
|
504 | JSON texts (either using L<JSON::XS> or L<JSON>). The written texts are |
|
|
505 | guaranteed not to contain any newline character. |
|
|
506 | |
|
|
507 | For security reasons, this encoder will likely I<not> handle numbers and |
|
|
508 | strings, only arrays and objects/hashes. The reason is that originally |
|
|
509 | JSON was self-delimited, but Dougles Crockford thought it was a splendid |
|
|
510 | idea to redefine JSON incompatibly, so this is no longer true. |
|
|
511 | |
|
|
512 | For protocols that used back-to-back JSON texts, this might lead to |
|
|
513 | run-ins, where two or more JSON texts will be interpreted as one JSON |
494 | texts. |
514 | text. |
495 | |
515 | |
|
|
516 | For this reason, if the default encoder uses L<JSON::XS>, it will default |
|
|
517 | to not allowing anything but arrays and objects/hashes, at least for the |
|
|
518 | forseeable future (it will change at some point). This might or might not |
|
|
519 | be true for the L<JSON> module, so this might cause a security issue. |
|
|
520 | |
|
|
521 | If you depend on either behaviour, you should create your own json object |
|
|
522 | and pass it in explicitly. |
|
|
523 | |
|
|
524 | =item cbor => L<CBOR::XS> object |
|
|
525 | |
|
|
526 | This is the cbor coder object used by the C<cbor> read and write types. |
|
|
527 | |
|
|
528 | If you don't supply it, then AnyEvent::Handle will create and use a |
|
|
529 | suitable one (on demand), which will write CBOR without using extensions, |
|
|
530 | if possible. |
|
|
531 | |
496 | Note that you are responsible to depend on the JSON module if you want to |
532 | Note that you are responsible to depend on the L<CBOR::XS> module if you |
497 | use this functionality, as AnyEvent does not have a dependency itself. |
533 | want to use this functionality, as AnyEvent does not have a dependency on |
|
|
534 | it itself. |
498 | |
535 | |
499 | =back |
536 | =back |
500 | |
537 | |
501 | =cut |
538 | =cut |
502 | |
539 | |
… | |
… | |
880 | |
917 | |
881 | The write queue is very simple: you can add data to its end, and |
918 | The write queue is very simple: you can add data to its end, and |
882 | AnyEvent::Handle will automatically try to get rid of it for you. |
919 | AnyEvent::Handle will automatically try to get rid of it for you. |
883 | |
920 | |
884 | When data could be written and the write buffer is shorter then the low |
921 | When data could be written and the write buffer is shorter then the low |
885 | water mark, the C<on_drain> callback will be invoked. |
922 | water mark, the C<on_drain> callback will be invoked once. |
886 | |
923 | |
887 | =over 4 |
924 | =over 4 |
888 | |
925 | |
889 | =item $handle->on_drain ($cb) |
926 | =item $handle->on_drain ($cb) |
890 | |
927 | |
… | |
… | |
934 | $self->{on_drain}($self) |
971 | $self->{on_drain}($self) |
935 | if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}) |
972 | if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf}) |
936 | && $self->{on_drain}; |
973 | && $self->{on_drain}; |
937 | |
974 | |
938 | delete $self->{_ww} unless length $self->{wbuf}; |
975 | delete $self->{_ww} unless length $self->{wbuf}; |
939 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
976 | } elsif ($! != EAGAIN && $! != EINTR && $! != EWOULDBLOCK && $! != WSAEWOULDBLOCK) { |
940 | $self->_error ($!, 1); |
977 | $self->_error ($!, 1); |
941 | } |
978 | } |
942 | }; |
979 | }; |
943 | |
980 | |
944 | # try to write data immediately |
981 | # try to write data immediately |
… | |
… | |
1032 | |
1069 | |
1033 | Encodes the given hash or array reference into a JSON object. Unless you |
1070 | Encodes the given hash or array reference into a JSON object. Unless you |
1034 | provide your own JSON object, this means it will be encoded to JSON text |
1071 | provide your own JSON object, this means it will be encoded to JSON text |
1035 | in UTF-8. |
1072 | in UTF-8. |
1036 | |
1073 | |
|
|
1074 | The default encoder might or might not handle every type of JSON value - |
|
|
1075 | it might be limited to arrays and objects for security reasons. See the |
|
|
1076 | C<json> constructor attribute for more details. |
|
|
1077 | |
1037 | JSON objects (and arrays) are self-delimiting, so you can write JSON at |
1078 | JSON objects (and arrays) are self-delimiting, so if you only use arrays |
1038 | one end of a handle and read them at the other end without using any |
1079 | and hashes, you can write JSON at one end of a handle and read them at the |
1039 | additional framing. |
1080 | other end without using any additional framing. |
1040 | |
1081 | |
1041 | The generated JSON text is guaranteed not to contain any newlines: While |
1082 | The JSON text generated by the default encoder is guaranteed not to |
1042 | this module doesn't need delimiters after or between JSON texts to be |
1083 | contain any newlines: While this module doesn't need delimiters after or |
1043 | able to read them, many other languages depend on that. |
1084 | between JSON texts to be able to read them, many other languages depend on |
|
|
1085 | them. |
1044 | |
1086 | |
1045 | A simple RPC protocol that interoperates easily with others is to send |
1087 | A simple RPC protocol that interoperates easily with other languages is |
1046 | JSON arrays (or objects, although arrays are usually the better choice as |
1088 | to send JSON arrays (or objects, although arrays are usually the better |
1047 | they mimic how function argument passing works) and a newline after each |
1089 | choice as they mimic how function argument passing works) and a newline |
1048 | JSON text: |
1090 | after each JSON text: |
1049 | |
1091 | |
1050 | $handle->push_write (json => ["method", "arg1", "arg2"]); # whatever |
1092 | $handle->push_write (json => ["method", "arg1", "arg2"]); # whatever |
1051 | $handle->push_write ("\012"); |
1093 | $handle->push_write ("\012"); |
1052 | |
1094 | |
1053 | An AnyEvent::Handle receiver would simply use the C<json> read type and |
1095 | An AnyEvent::Handle receiver would simply use the C<json> read type and |
… | |
… | |
1056 | $handle->push_read (json => sub { my $array = $_[1]; ... }); |
1098 | $handle->push_read (json => sub { my $array = $_[1]; ... }); |
1057 | |
1099 | |
1058 | Other languages could read single lines terminated by a newline and pass |
1100 | Other languages could read single lines terminated by a newline and pass |
1059 | this line into their JSON decoder of choice. |
1101 | this line into their JSON decoder of choice. |
1060 | |
1102 | |
|
|
1103 | =item cbor => $perl_scalar |
|
|
1104 | |
|
|
1105 | Encodes the given scalar into a CBOR value. Unless you provide your own |
|
|
1106 | L<CBOR::XS> object, this means it will be encoded to a CBOR string not |
|
|
1107 | using any extensions, if possible. |
|
|
1108 | |
|
|
1109 | CBOR values are self-delimiting, so you can write CBOR at one end of |
|
|
1110 | a handle and read them at the other end without using any additional |
|
|
1111 | framing. |
|
|
1112 | |
|
|
1113 | A simple nd very very fast RPC protocol that interoperates with |
|
|
1114 | other languages is to send CBOR and receive CBOR values (arrays are |
|
|
1115 | recommended): |
|
|
1116 | |
|
|
1117 | $handle->push_write (cbor => ["method", "arg1", "arg2"]); # whatever |
|
|
1118 | |
|
|
1119 | An AnyEvent::Handle receiver would simply use the C<cbor> read type: |
|
|
1120 | |
|
|
1121 | $handle->push_read (cbor => sub { my $array = $_[1]; ... }); |
|
|
1122 | |
1061 | =cut |
1123 | =cut |
1062 | |
1124 | |
1063 | sub json_coder() { |
1125 | sub json_coder() { |
1064 | eval { require JSON::XS; JSON::XS->new->utf8 } |
1126 | eval { require JSON::XS; JSON::XS->new->utf8 } |
1065 | || do { require JSON; JSON->new->utf8 } |
1127 | || do { require JSON::PP; JSON::PP->new->utf8 } |
1066 | } |
1128 | } |
1067 | |
1129 | |
1068 | register_write_type json => sub { |
1130 | register_write_type json => sub { |
1069 | my ($self, $ref) = @_; |
1131 | my ($self, $ref) = @_; |
1070 | |
1132 | |
1071 | my $json = $self->{json} ||= json_coder; |
1133 | ($self->{json} ||= json_coder) |
1072 | |
|
|
1073 | $json->encode ($ref) |
1134 | ->encode ($ref) |
|
|
1135 | }; |
|
|
1136 | |
|
|
1137 | sub cbor_coder() { |
|
|
1138 | require CBOR::XS; |
|
|
1139 | CBOR::XS->new |
|
|
1140 | } |
|
|
1141 | |
|
|
1142 | register_write_type cbor => sub { |
|
|
1143 | my ($self, $scalar) = @_; |
|
|
1144 | |
|
|
1145 | ($self->{cbor} ||= cbor_coder) |
|
|
1146 | ->encode ($scalar) |
1074 | }; |
1147 | }; |
1075 | |
1148 | |
1076 | =item storable => $reference |
1149 | =item storable => $reference |
1077 | |
1150 | |
1078 | Freezes the given reference using L<Storable> and writes it to the |
1151 | Freezes the given reference using L<Storable> and writes it to the |
… | |
… | |
1472 | |
1545 | |
1473 | register_read_type line => sub { |
1546 | register_read_type line => sub { |
1474 | my ($self, $cb, $eol) = @_; |
1547 | my ($self, $cb, $eol) = @_; |
1475 | |
1548 | |
1476 | if (@_ < 3) { |
1549 | if (@_ < 3) { |
1477 | # this is more than twice as fast as the generic code below |
1550 | # this is faster then the generic code below |
1478 | sub { |
1551 | sub { |
1479 | $_[0]{rbuf} =~ s/^([^\015\012]*)(\015?\012)// or return; |
1552 | (my $pos = index $_[0]{rbuf}, "\012") >= 0 |
|
|
1553 | or return; |
1480 | |
1554 | |
|
|
1555 | (my $str = substr $_[0]{rbuf}, 0, $pos + 1, "") =~ s/(\015?\012)\Z// or die; |
1481 | $cb->($_[0], $1, $2); |
1556 | $cb->($_[0], $str, "$1"); |
1482 | 1 |
1557 | 1 |
1483 | } |
1558 | } |
1484 | } else { |
1559 | } else { |
1485 | $eol = quotemeta $eol unless ref $eol; |
1560 | $eol = quotemeta $eol unless ref $eol; |
1486 | $eol = qr|^(.*?)($eol)|s; |
1561 | $eol = qr|^(.*?)($eol)|s; |
1487 | |
1562 | |
1488 | sub { |
1563 | sub { |
1489 | $_[0]{rbuf} =~ s/$eol// or return; |
1564 | $_[0]{rbuf} =~ s/$eol// or return; |
1490 | |
1565 | |
1491 | $cb->($_[0], $1, $2); |
1566 | $cb->($_[0], "$1", "$2"); |
1492 | 1 |
1567 | 1 |
1493 | } |
1568 | } |
1494 | } |
1569 | } |
1495 | }; |
1570 | }; |
1496 | |
1571 | |
1497 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
1572 | =item regex => $accept[, $reject[, $skip], $cb->($handle, $data) |
1498 | |
1573 | |
1499 | Makes a regex match against the regex object C<$accept> and returns |
1574 | Makes a regex match against the regex object C<$accept> and returns |
1500 | everything up to and including the match. |
1575 | everything up to and including the match. All the usual regex variables |
|
|
1576 | ($1, %+ etc.) from the regex match are available in the callback. |
1501 | |
1577 | |
1502 | Example: read a single line terminated by '\n'. |
1578 | Example: read a single line terminated by '\n'. |
1503 | |
1579 | |
1504 | $handle->push_read (regex => qr<\n>, sub { ... }); |
1580 | $handle->push_read (regex => qr<\n>, sub { ... }); |
1505 | |
1581 | |
… | |
… | |
1649 | =item json => $cb->($handle, $hash_or_arrayref) |
1725 | =item json => $cb->($handle, $hash_or_arrayref) |
1650 | |
1726 | |
1651 | Reads a JSON object or array, decodes it and passes it to the |
1727 | Reads a JSON object or array, decodes it and passes it to the |
1652 | callback. When a parse error occurs, an C<EBADMSG> error will be raised. |
1728 | callback. When a parse error occurs, an C<EBADMSG> error will be raised. |
1653 | |
1729 | |
1654 | If a C<json> object was passed to the constructor, then that will be used |
1730 | If a C<json> object was passed to the constructor, then that will be |
1655 | for the final decode, otherwise it will create a JSON coder expecting UTF-8. |
1731 | used for the final decode, otherwise it will create a L<JSON::XS> or |
|
|
1732 | L<JSON::PP> coder object expecting UTF-8. |
1656 | |
1733 | |
1657 | This read type uses the incremental parser available with JSON version |
1734 | This read type uses the incremental parser available with JSON version |
1658 | 2.09 (and JSON::XS version 2.2) and above. You have to provide a |
1735 | 2.09 (and JSON::XS version 2.2) and above. |
1659 | dependency on your own: this module will load the JSON module, but |
|
|
1660 | AnyEvent does not depend on it itself. |
|
|
1661 | |
1736 | |
1662 | Since JSON texts are fully self-delimiting, the C<json> read and write |
1737 | Since JSON texts are fully self-delimiting, the C<json> read and write |
1663 | types are an ideal simple RPC protocol: just exchange JSON datagrams. See |
1738 | types are an ideal simple RPC protocol: just exchange JSON datagrams. See |
1664 | the C<json> write type description, above, for an actual example. |
1739 | the C<json> write type description, above, for an actual example. |
1665 | |
1740 | |
… | |
… | |
1669 | my ($self, $cb) = @_; |
1744 | my ($self, $cb) = @_; |
1670 | |
1745 | |
1671 | my $json = $self->{json} ||= json_coder; |
1746 | my $json = $self->{json} ||= json_coder; |
1672 | |
1747 | |
1673 | my $data; |
1748 | my $data; |
1674 | my $rbuf = \$self->{rbuf}; |
|
|
1675 | |
1749 | |
1676 | sub { |
1750 | sub { |
1677 | my $ref = eval { $json->incr_parse ($_[0]{rbuf}) }; |
1751 | my $ref = eval { $json->incr_parse ($_[0]{rbuf}) }; |
1678 | |
1752 | |
1679 | if ($ref) { |
1753 | if ($ref) { |
… | |
… | |
1698 | () |
1772 | () |
1699 | } |
1773 | } |
1700 | } |
1774 | } |
1701 | }; |
1775 | }; |
1702 | |
1776 | |
|
|
1777 | =item cbor => $cb->($handle, $scalar) |
|
|
1778 | |
|
|
1779 | Reads a CBOR value, decodes it and passes it to the callback. When a parse |
|
|
1780 | error occurs, an C<EBADMSG> error will be raised. |
|
|
1781 | |
|
|
1782 | If a L<CBOR::XS> object was passed to the constructor, then that will be |
|
|
1783 | used for the final decode, otherwise it will create a CBOR coder without |
|
|
1784 | enabling any options. |
|
|
1785 | |
|
|
1786 | You have to provide a dependency to L<CBOR::XS> on your own: this module |
|
|
1787 | will load the L<CBOR::XS> module, but AnyEvent does not depend on it |
|
|
1788 | itself. |
|
|
1789 | |
|
|
1790 | Since CBOR values are fully self-delimiting, the C<cbor> read and write |
|
|
1791 | types are an ideal simple RPC protocol: just exchange CBOR datagrams. See |
|
|
1792 | the C<cbor> write type description, above, for an actual example. |
|
|
1793 | |
|
|
1794 | =cut |
|
|
1795 | |
|
|
1796 | register_read_type cbor => sub { |
|
|
1797 | my ($self, $cb) = @_; |
|
|
1798 | |
|
|
1799 | my $cbor = $self->{cbor} ||= cbor_coder; |
|
|
1800 | |
|
|
1801 | my $data; |
|
|
1802 | |
|
|
1803 | sub { |
|
|
1804 | my (@value) = eval { $cbor->incr_parse ($_[0]{rbuf}) }; |
|
|
1805 | |
|
|
1806 | if (@value) { |
|
|
1807 | $cb->($_[0], @value); |
|
|
1808 | |
|
|
1809 | 1 |
|
|
1810 | } elsif ($@) { |
|
|
1811 | # error case |
|
|
1812 | $cbor->incr_reset; |
|
|
1813 | |
|
|
1814 | $_[0]->_error (Errno::EBADMSG); |
|
|
1815 | |
|
|
1816 | () |
|
|
1817 | } else { |
|
|
1818 | () |
|
|
1819 | } |
|
|
1820 | } |
|
|
1821 | }; |
|
|
1822 | |
1703 | =item storable => $cb->($handle, $ref) |
1823 | =item storable => $cb->($handle, $ref) |
1704 | |
1824 | |
1705 | Deserialises a L<Storable> frozen representation as written by the |
1825 | Deserialises a L<Storable> frozen representation as written by the |
1706 | C<storable> write type (BER-encoded length prefix followed by nfreeze'd |
1826 | C<storable> write type (BER-encoded length prefix followed by nfreeze'd |
1707 | data). |
1827 | data). |
… | |
… | |
1724 | |
1844 | |
1725 | # bypass unshift if we already have the remaining chunk |
1845 | # bypass unshift if we already have the remaining chunk |
1726 | if ($format + $len <= length $_[0]{rbuf}) { |
1846 | if ($format + $len <= length $_[0]{rbuf}) { |
1727 | my $data = substr $_[0]{rbuf}, $format, $len; |
1847 | my $data = substr $_[0]{rbuf}, $format, $len; |
1728 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
1848 | substr $_[0]{rbuf}, 0, $format + $len, ""; |
|
|
1849 | |
1729 | $cb->($_[0], Storable::thaw ($data)); |
1850 | eval { $cb->($_[0], Storable::thaw ($data)); 1 } |
|
|
1851 | or return $_[0]->_error (Errno::EBADMSG); |
1730 | } else { |
1852 | } else { |
1731 | # remove prefix |
1853 | # remove prefix |
1732 | substr $_[0]{rbuf}, 0, $format, ""; |
1854 | substr $_[0]{rbuf}, 0, $format, ""; |
1733 | |
1855 | |
1734 | # read remaining chunk |
1856 | # read remaining chunk |
1735 | $_[0]->unshift_read (chunk => $len, sub { |
1857 | $_[0]->unshift_read (chunk => $len, sub { |
1736 | if (my $ref = eval { Storable::thaw ($_[1]) }) { |
1858 | eval { $cb->($_[0], Storable::thaw ($_[1])); 1 } |
1737 | $cb->($_[0], $ref); |
|
|
1738 | } else { |
|
|
1739 | $_[0]->_error (Errno::EBADMSG); |
1859 | or $_[0]->_error (Errno::EBADMSG); |
1740 | } |
|
|
1741 | }); |
1860 | }); |
1742 | } |
1861 | } |
1743 | |
1862 | |
1744 | 1 |
1863 | 1 |
1745 | } |
1864 | } |
|
|
1865 | }; |
|
|
1866 | |
|
|
1867 | =item tls_detect => $cb->($handle, $detect, $major, $minor) |
|
|
1868 | |
|
|
1869 | Checks the input stream for a valid SSL or TLS handshake TLSPaintext |
|
|
1870 | record without consuming anything. Only SSL version 3 or higher |
|
|
1871 | is handled, up to the fictituous protocol 4.x (but both SSL3+ and |
|
|
1872 | SSL2-compatible framing is supported). |
|
|
1873 | |
|
|
1874 | If it detects that the input data is likely TLS, it calls the callback |
|
|
1875 | with a true value for C<$detect> and the (on-wire) TLS version as second |
|
|
1876 | and third argument (C<$major> is C<3>, and C<$minor> is 0..3 for SSL |
|
|
1877 | 3.0, TLS 1.0, 1.1 and 1.2, respectively). If it detects the input to |
|
|
1878 | be definitely not TLS, it calls the callback with a false value for |
|
|
1879 | C<$detect>. |
|
|
1880 | |
|
|
1881 | The callback could use this information to decide whether or not to start |
|
|
1882 | TLS negotiation. |
|
|
1883 | |
|
|
1884 | In all cases the data read so far is passed to the following read |
|
|
1885 | handlers. |
|
|
1886 | |
|
|
1887 | Usually you want to use the C<tls_autostart> read type instead. |
|
|
1888 | |
|
|
1889 | If you want to design a protocol that works in the presence of TLS |
|
|
1890 | dtection, make sure that any non-TLS data doesn't start with the octet 22 |
|
|
1891 | (ASCII SYN, 16 hex) or 128-255 (i.e. highest bit set). The checks this |
|
|
1892 | read type does are a bit more strict, but might losen in the future to |
|
|
1893 | accomodate protocol changes. |
|
|
1894 | |
|
|
1895 | This read type does not rely on L<AnyEvent::TLS> (and thus, not on |
|
|
1896 | L<Net::SSLeay>). |
|
|
1897 | |
|
|
1898 | =item tls_autostart => $tls[, $tls_ctx] |
|
|
1899 | |
|
|
1900 | Tries to detect a valid SSL or TLS handshake. If one is detected, it tries |
|
|
1901 | to start tls by calling C<starttls> with the given arguments. |
|
|
1902 | |
|
|
1903 | In practise, C<$tls> must be C<accept>, or a Net::SSLeay context that has |
|
|
1904 | been configured to accept, as servers do not normally send a handshake on |
|
|
1905 | their own and ths cannot be detected in this way. |
|
|
1906 | |
|
|
1907 | See C<tls_detect> above for more details. |
|
|
1908 | |
|
|
1909 | Example: give the client a chance to start TLS before accepting a text |
|
|
1910 | line. |
|
|
1911 | |
|
|
1912 | $hdl->push_read (tls_detect => "accept"); |
|
|
1913 | $hdl->push_read (line => sub { |
|
|
1914 | print "received ", ($_[0]{tls} ? "encrypted" : "cleartext"), " <$_[1]>\n"; |
|
|
1915 | }); |
|
|
1916 | |
|
|
1917 | =cut |
|
|
1918 | |
|
|
1919 | register_read_type tls_detect => sub { |
|
|
1920 | my ($self, $cb) = @_; |
|
|
1921 | |
|
|
1922 | sub { |
|
|
1923 | # this regex matches a full or partial tls record |
|
|
1924 | if ( |
|
|
1925 | # ssl3+: type(22=handshake) major(=3) minor(any) length_hi |
|
|
1926 | $self->{rbuf} =~ /^(?:\z| \x16 (\z| [\x03\x04] (?:\z| . (?:\z| [\x00-\x40] ))))/xs |
|
|
1927 | # ssl2 comapatible: len_hi len_lo type(1) major minor dummy(forlength) |
|
|
1928 | or $self->{rbuf} =~ /^(?:\z| [\x80-\xff] (?:\z| . (?:\z| \x01 (\z| [\x03\x04] (?:\z| . (?:\z| . ))))))/xs |
|
|
1929 | ) { |
|
|
1930 | return if 3 != length $1; # partial match, can't decide yet |
|
|
1931 | |
|
|
1932 | # full match, valid TLS record |
|
|
1933 | my ($major, $minor) = unpack "CC", $1; |
|
|
1934 | $cb->($self, "accept", $major + $minor * 0.1); |
|
|
1935 | } else { |
|
|
1936 | # mismatch == guaranteed not TLS |
|
|
1937 | $cb->($self, undef); |
|
|
1938 | } |
|
|
1939 | |
|
|
1940 | 1 |
|
|
1941 | } |
|
|
1942 | }; |
|
|
1943 | |
|
|
1944 | register_read_type tls_autostart => sub { |
|
|
1945 | my ($self, @tls) = @_; |
|
|
1946 | |
|
|
1947 | $RH{tls_detect}($self, sub { |
|
|
1948 | return unless $_[1]; |
|
|
1949 | $_[0]->starttls (@tls); |
|
|
1950 | }) |
1746 | }; |
1951 | }; |
1747 | |
1952 | |
1748 | =back |
1953 | =back |
1749 | |
1954 | |
1750 | =item custom read types - Package::anyevent_read_type $handle, $cb, @args |
1955 | =item custom read types - Package::anyevent_read_type $handle, $cb, @args |
… | |
… | |
1834 | } elsif (defined $len) { |
2039 | } elsif (defined $len) { |
1835 | delete $self->{_rw}; |
2040 | delete $self->{_rw}; |
1836 | $self->{_eof} = 1; |
2041 | $self->{_eof} = 1; |
1837 | $self->_drain_rbuf; |
2042 | $self->_drain_rbuf; |
1838 | |
2043 | |
1839 | } elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) { |
2044 | } elsif ($! != EAGAIN && $! != EINTR && $! != EWOULDBLOCK && $! != WSAEWOULDBLOCK) { |
1840 | return $self->_error ($!, 1); |
2045 | return $self->_error ($!, 1); |
1841 | } |
2046 | } |
1842 | }; |
2047 | }; |
1843 | } |
2048 | } |
1844 | } |
2049 | } |
… | |
… | |
1850 | my ($self, $err) = @_; |
2055 | my ($self, $err) = @_; |
1851 | |
2056 | |
1852 | return $self->_error ($!, 1) |
2057 | return $self->_error ($!, 1) |
1853 | if $err == Net::SSLeay::ERROR_SYSCALL (); |
2058 | if $err == Net::SSLeay::ERROR_SYSCALL (); |
1854 | |
2059 | |
1855 | my $err =Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ()); |
2060 | my $err = Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ()); |
1856 | |
2061 | |
1857 | # reduce error string to look less scary |
2062 | # reduce error string to look less scary |
1858 | $err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /; |
2063 | $err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /; |
1859 | |
2064 | |
1860 | if ($self->{_on_starttls}) { |
2065 | if ($self->{_on_starttls}) { |
… | |
… | |
1874 | sub _dotls { |
2079 | sub _dotls { |
1875 | my ($self) = @_; |
2080 | my ($self) = @_; |
1876 | |
2081 | |
1877 | my $tmp; |
2082 | my $tmp; |
1878 | |
2083 | |
1879 | if (length $self->{_tls_wbuf}) { |
2084 | while (length $self->{_tls_wbuf}) { |
1880 | while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) { |
2085 | if (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) <= 0) { |
1881 | substr $self->{_tls_wbuf}, 0, $tmp, ""; |
2086 | $tmp = Net::SSLeay::get_error ($self->{tls}, $tmp); |
|
|
2087 | |
|
|
2088 | return $self->_tls_error ($tmp) |
|
|
2089 | if $tmp != $ERROR_WANT_READ |
|
|
2090 | && ($tmp != $ERROR_SYSCALL || $!); |
|
|
2091 | |
|
|
2092 | last; |
1882 | } |
2093 | } |
1883 | |
2094 | |
1884 | $tmp = Net::SSLeay::get_error ($self->{tls}, $tmp); |
2095 | substr $self->{_tls_wbuf}, 0, $tmp, ""; |
1885 | return $self->_tls_error ($tmp) |
|
|
1886 | if $tmp != $ERROR_WANT_READ |
|
|
1887 | && ($tmp != $ERROR_SYSCALL || $!); |
|
|
1888 | } |
2096 | } |
1889 | |
2097 | |
1890 | while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) { |
2098 | while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) { |
1891 | unless (length $tmp) { |
2099 | unless (length $tmp) { |
1892 | $self->{_on_starttls} |
2100 | $self->{_on_starttls} |
… | |
… | |
1906 | $self->{_tls_rbuf} .= $tmp; |
2114 | $self->{_tls_rbuf} .= $tmp; |
1907 | $self->_drain_rbuf; |
2115 | $self->_drain_rbuf; |
1908 | $self->{tls} or return; # tls session might have gone away in callback |
2116 | $self->{tls} or return; # tls session might have gone away in callback |
1909 | } |
2117 | } |
1910 | |
2118 | |
1911 | $tmp = Net::SSLeay::get_error ($self->{tls}, -1); |
2119 | $tmp = Net::SSLeay::get_error ($self->{tls}, -1); # -1 is not neccessarily correct, but Net::SSLeay doesn't tell us |
1912 | return $self->_tls_error ($tmp) |
2120 | return $self->_tls_error ($tmp) |
1913 | if $tmp != $ERROR_WANT_READ |
2121 | if $tmp != $ERROR_WANT_READ |
1914 | && ($tmp != $ERROR_SYSCALL || $!); |
2122 | && ($tmp != $ERROR_SYSCALL || $!); |
1915 | |
2123 | |
1916 | while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
2124 | while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) { |
… | |
… | |
1926 | |
2134 | |
1927 | =item $handle->starttls ($tls[, $tls_ctx]) |
2135 | =item $handle->starttls ($tls[, $tls_ctx]) |
1928 | |
2136 | |
1929 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
2137 | Instead of starting TLS negotiation immediately when the AnyEvent::Handle |
1930 | object is created, you can also do that at a later time by calling |
2138 | object is created, you can also do that at a later time by calling |
1931 | C<starttls>. |
2139 | C<starttls>. See the C<tls> constructor argument for general info. |
1932 | |
2140 | |
1933 | Starting TLS is currently an asynchronous operation - when you push some |
2141 | Starting TLS is currently an asynchronous operation - when you push some |
1934 | write data and then call C<< ->starttls >> then TLS negotiation will start |
2142 | write data and then call C<< ->starttls >> then TLS negotiation will start |
1935 | immediately, after which the queued write data is then sent. |
2143 | immediately, after which the queued write data is then sent. This might |
|
|
2144 | change in future versions, so best make sure you have no outstanding write |
|
|
2145 | data when calling this method. |
1936 | |
2146 | |
1937 | The first argument is the same as the C<tls> constructor argument (either |
2147 | The first argument is the same as the C<tls> constructor argument (either |
1938 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
2148 | C<"connect">, C<"accept"> or an existing Net::SSLeay object). |
1939 | |
2149 | |
1940 | The second argument is the optional C<AnyEvent::TLS> object that is used |
2150 | The second argument is the optional C<AnyEvent::TLS> object that is used |
… | |
… | |
1962 | my ($self, $tls, $ctx) = @_; |
2172 | my ($self, $tls, $ctx) = @_; |
1963 | |
2173 | |
1964 | Carp::croak "It is an error to call starttls on an AnyEvent::Handle object while TLS is already active, caught" |
2174 | Carp::croak "It is an error to call starttls on an AnyEvent::Handle object while TLS is already active, caught" |
1965 | if $self->{tls}; |
2175 | if $self->{tls}; |
1966 | |
2176 | |
|
|
2177 | unless (defined $AnyEvent::TLS::VERSION) { |
|
|
2178 | eval { |
|
|
2179 | require Net::SSLeay; |
|
|
2180 | require AnyEvent::TLS; |
|
|
2181 | 1 |
|
|
2182 | } or return $self->_error (Errno::EPROTO, 1, "TLS support not available on this system"); |
|
|
2183 | } |
|
|
2184 | |
1967 | $self->{tls} = $tls; |
2185 | $self->{tls} = $tls; |
1968 | $self->{tls_ctx} = $ctx if @_ > 2; |
2186 | $self->{tls_ctx} = $ctx if @_ > 2; |
1969 | |
2187 | |
1970 | return unless $self->{fh}; |
2188 | return unless $self->{fh}; |
1971 | |
2189 | |
1972 | require Net::SSLeay; |
|
|
1973 | |
|
|
1974 | $ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL (); |
2190 | $ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL (); |
1975 | $ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ (); |
2191 | $ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ (); |
1976 | |
2192 | |
1977 | $tls = delete $self->{tls}; |
2193 | $tls = delete $self->{tls}; |
1978 | $ctx = $self->{tls_ctx}; |
2194 | $ctx = $self->{tls_ctx}; |
1979 | |
2195 | |
1980 | local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session |
2196 | local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session |
1981 | |
2197 | |
1982 | if ("HASH" eq ref $ctx) { |
2198 | if ("HASH" eq ref $ctx) { |
1983 | require AnyEvent::TLS; |
|
|
1984 | |
|
|
1985 | if ($ctx->{cache}) { |
2199 | if ($ctx->{cache}) { |
1986 | my $key = $ctx+0; |
2200 | my $key = $ctx+0; |
1987 | $ctx = $TLS_CACHE{$key} ||= new AnyEvent::TLS %$ctx; |
2201 | $ctx = $TLS_CACHE{$key} ||= new AnyEvent::TLS %$ctx; |
1988 | } else { |
2202 | } else { |
1989 | $ctx = new AnyEvent::TLS %$ctx; |
2203 | $ctx = new AnyEvent::TLS %$ctx; |
… | |
… | |
2091 | push @linger, AE::io $fh, 1, sub { |
2305 | push @linger, AE::io $fh, 1, sub { |
2092 | my $len = syswrite $fh, $wbuf, length $wbuf; |
2306 | my $len = syswrite $fh, $wbuf, length $wbuf; |
2093 | |
2307 | |
2094 | if ($len > 0) { |
2308 | if ($len > 0) { |
2095 | substr $wbuf, 0, $len, ""; |
2309 | substr $wbuf, 0, $len, ""; |
2096 | } elsif (defined $len || ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK)) { |
2310 | } elsif (defined $len || ($! != EAGAIN && $! != EINTR && $! != EWOULDBLOCK && $! != WSAEWOULDBLOCK)) { |
2097 | @linger = (); # end |
2311 | @linger = (); # end |
2098 | } |
2312 | } |
2099 | }; |
2313 | }; |
2100 | push @linger, AE::timer $linger, 0, sub { |
2314 | push @linger, AE::timer $linger, 0, sub { |
2101 | @linger = (); |
2315 | @linger = (); |
… | |
… | |
2222 | handles requests until the server gets some QUIT command, causing it to |
2436 | handles requests until the server gets some QUIT command, causing it to |
2223 | close the connection first (highly desirable for a busy TCP server). A |
2437 | close the connection first (highly desirable for a busy TCP server). A |
2224 | client dropping the connection is an error, which means this variant can |
2438 | client dropping the connection is an error, which means this variant can |
2225 | detect an unexpected detection close. |
2439 | detect an unexpected detection close. |
2226 | |
2440 | |
2227 | To handle this case, always make sure you have a on-empty read queue, by |
2441 | To handle this case, always make sure you have a non-empty read queue, by |
2228 | pushing the "read request start" handler on it: |
2442 | pushing the "read request start" handler on it: |
2229 | |
2443 | |
2230 | # we assume a request starts with a single line |
2444 | # we assume a request starts with a single line |
2231 | my @start_request; @start_request = (line => sub { |
2445 | my @start_request; @start_request = (line => sub { |
2232 | my ($hdl, $line) = @_; |
2446 | my ($hdl, $line) = @_; |
… | |
… | |
2330 | C<low_water_mark> this will be called precisely when all data has been |
2544 | C<low_water_mark> this will be called precisely when all data has been |
2331 | written to the socket: |
2545 | written to the socket: |
2332 | |
2546 | |
2333 | $handle->push_write (...); |
2547 | $handle->push_write (...); |
2334 | $handle->on_drain (sub { |
2548 | $handle->on_drain (sub { |
2335 | AE::log debug => "all data submitted to the kernel\n"; |
2549 | AE::log debug => "All data submitted to the kernel."; |
2336 | undef $handle; |
2550 | undef $handle; |
2337 | }); |
2551 | }); |
2338 | |
2552 | |
2339 | If you just want to queue some data and then signal EOF to the other side, |
2553 | If you just want to queue some data and then signal EOF to the other side, |
2340 | consider using C<< ->push_shutdown >> instead. |
2554 | consider using C<< ->push_shutdown >> instead. |
… | |
… | |
2424 | When you have intermediate CA certificates that your clients might not |
2638 | When you have intermediate CA certificates that your clients might not |
2425 | know about, just append them to the C<cert_file>. |
2639 | know about, just append them to the C<cert_file>. |
2426 | |
2640 | |
2427 | =back |
2641 | =back |
2428 | |
2642 | |
2429 | |
|
|
2430 | =head1 SUBCLASSING AnyEvent::Handle |
2643 | =head1 SUBCLASSING AnyEvent::Handle |
2431 | |
2644 | |
2432 | In many cases, you might want to subclass AnyEvent::Handle. |
2645 | In many cases, you might want to subclass AnyEvent::Handle. |
2433 | |
2646 | |
2434 | To make this easier, a given version of AnyEvent::Handle uses these |
2647 | To make this easier, a given version of AnyEvent::Handle uses these |
… | |
… | |
2460 | |
2673 | |
2461 | Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. |
2674 | Robin Redeker C<< <elmex at ta-sa.org> >>, Marc Lehmann <schmorp@schmorp.de>. |
2462 | |
2675 | |
2463 | =cut |
2676 | =cut |
2464 | |
2677 | |
2465 | 1; # End of AnyEvent::Handle |
2678 | 1 |
|
|
2679 | |