[ViewVC] Diff of: cvs/AnyEvent/lib/AnyEvent/Handle.pm

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.62 by root, Fri Jun 6 10:49:20 2008 UTC vs.
Revision 1.69 by root, Sun Jun 15 21:44:56 2008 UTC

 AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent
 =cut
-our $VERSION = 4.14;
+our $VERSION = 4.151;
 =head1 SYNOPSIS
    use AnyEvent;
    use AnyEvent::Handle;
 This sets the callback that is called when the write buffer becomes empty
 (or when the callback is set and the buffer is empty already).
 To append to the write buffer, use the C<< ->push_write >> method.
+This callback is useful when you don't want to put all of your write data
+into the queue at once, for example, when you want to write the contents
+of some file to the socket you might not want to read the whole file into
+memory and push it into the queue, but instead only read more data from
+the file when the write queue becomes empty.
 =item timeout => $fractional_seconds
 If non-zero, then this enables an "inactivity" timeout: whenever this many
 seconds pass without a successful read or write on the underlying file
 handle, the C<on_timeout> callback will be invoked (and if that one is
    $self->{_activity} = AnyEvent->now;
    $self->_timeout;
    $self->on_drain (delete $self->{on_drain}) if $self->{on_drain};
+   $self->start_read
+      if $self->{on_read};
    $self
 }
 sub _shutdown {
 =cut
 register_write_type packstring => sub {
    my ($self, $format, $string) = @_;
-   pack "$format/a", $string
+   pack "$format/a*", $string
 };
 =item json => $array_or_hashref
 Encodes the given hash or array reference into a JSON object. Unless you
    $self->{json} ? $self->{json}->encode ($ref)
                  : JSON::encode_json ($ref)
 };
+=item storable => $reference
+Freezes the given reference using L<Storable> and writes it to the
+handle. Uses the C<nfreeze> format.
+=cut
+register_write_type storable => sub {
+   my ($self, $ref) = @_;
+   require Storable;
+   pack "w/a*", Storable::nfreeze ($ref)
+};
 =back
 =item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
 This function (not method) lets you add your own types to C<push_write>.
 ways, the "simple" way, using only C<on_read> and the "complex" way, using
 a queue.
 In the simple case, you just install an C<on_read> callback and whenever
 new data arrives, it will be called. You can then remove some data (if
-enough is there) from the read buffer (C<< $handle->rbuf >>) if you want
+enough is there) from the read buffer (C<< $handle->rbuf >>). Or you cna
-or not.
+leave the data there if you want to accumulate more (e.g. when only a
+partial message has been received so far).
 In the more complex case, you want to queue multiple callbacks. In this
 case, AnyEvent::Handle will call the first queued callback each time new
 data arrives (also the first time it is queued) and removes it when it has
 done its job (see C<push_read>, below).
             # handle xml
          });
       });
    });
-Example 2: Implement a client for a protocol that replies either with
+Example 2: Implement a client for a protocol that replies either with "OK"
-"OK" and another line or "ERROR" for one request, and 64 bytes for the
+and another line or "ERROR" for the first request that is sent, and 64
-second request. Due tot he availability of a full queue, we can just
+bytes for the second request. Due to the availability of a queue, we can
-pipeline sending both requests and manipulate the queue as necessary in
+just pipeline sending both requests and manipulate the queue as necessary
-the callbacks:
+in the callbacks.
-   # request one
+When the first callback is called and sees an "OK" response, it will
+C<unshift> another line-read. This line-read will be queued I<before> the
+64-byte chunk callback.
+   # request one, returns either "OK + extra line" or "ERROR"
    $handle->push_write ("request 1\015\012");
    # we expect "ERROR" or "OK" as response, so push a line read
    $handle->push_read (line => sub {
       # if we got an "OK", we have to _prepend_ another line,
             ...
          });
       }
    });
-   # request two
+   # request two, simply returns 64 octets
    $handle->push_write ("request 2\015\012");
    # simply read 64 bytes, always
    $handle->push_read (chunk => 64, sub {
       my $response = $_[1];
 the C<json> write type description, above, for an actual example.
 =cut
 register_read_type json => sub {
-   my ($self, $cb, $accept, $reject, $skip) = @_;
+   my ($self, $cb) = @_;
    require JSON;
    my $data;
    my $rbuf = \$self->{rbuf};
          1
       } else {
          $self->{rbuf} = "";
          ()
       }
+   }
+};
+=item storable => $cb->($handle, $ref)
+Deserialises a L<Storable> frozen representation as written by the
+C<storable> write type (BER-encoded length prefix followed by nfreeze'd
+data).
+Raises C<EBADMSG> error if the data could not be decoded.
+=cut
+register_read_type storable => sub {
+   my ($self, $cb) = @_;
+   require Storable;
+   sub {
+      # when we can use 5.10 we can use ".", but for 5.8 we use the re-pack method
+      defined (my $len = eval { unpack "w", $_[0]->{rbuf} })
+         or return;
+      # remove prefix
+      substr $_[0]->{rbuf}, 0, (length pack "w", $len), "";
+      # read rest
+      $_[0]->unshift_read (chunk => $len, sub {
+         if (my $ref = eval { Storable::thaw ($_[1]) }) {
+            $cb->($_[0], $ref);
+         } else {
+            $self->_error (&Errno::EBADMSG);
+         }
+      });
    }
 };
 =back

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents): Revision 1.62 by root, Fri Jun 6 10:49:20 2008 UTC vs. Revision 1.69 by root, Sun Jun 15 21:44:56 2008 UTC

Diff Legend

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.62 by root, Fri Jun 6 10:49:20 2008 UTC vs.
Revision 1.69 by root, Sun Jun 15 21:44:56 2008 UTC