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PhutilSocketChannel.php
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Created
Wed, Aug 21, 22:27
Size
4 KB
Mime Type
text/x-php
Expires
Fri, Aug 23, 22:27 (1 d, 23 h)
Engine
blob
Format
Raw Data
Handle
20074224
Attached To
rPHU libphutil
PhutilSocketChannel.php
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<?php
/*
* Copyright 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Channel on an underlying stream socket or socket pair. For a description of
* channels, see @{class:PhutilChannel}.
*
* Using a network socket:
*
* $socket = stream_socket_client(...);
* $channel = new PhutilSocketChannel($socket);
*
* Using stdin/stdout:
*
* $channel = new PhutilSocketChannel(
* fopen('php://stdin', 'r'),
* fopen('php://stdout', 'w'));
*
* @task construct Construction
*
* @group channel
*/
final
class
PhutilSocketChannel
extends
PhutilChannel
{
private
$readSocket
;
private
$writeSocket
;
/* -( Construction )------------------------------------------------------- */
/**
* Construct a socket channel from a socket or a socket pair.
*
* NOTE: This must be a //stream// socket from `stream_socket_client()` or
* `stream_socket_server()` or similar, not a //plain// socket from
* `socket_create()` or similar.
*
* @param socket Socket (stream socket, not plain socket). If only one
* socket is provided, it is used for reading and writing.
* @param socket? Optional write socket.
*
* @task construct
*/
public
function
__construct
(
$read_socket
,
$write_socket
=
null
)
{
foreach
(
array
(
$read_socket
,
$write_socket
)
as
$socket
)
{
if
(!
$socket
)
{
continue
;
}
$ok
=
stream_set_blocking
(
$socket
,
false
);
if
(!
$ok
)
{
throw
new
Exception
(
"Failed to set socket nonblocking!"
);
}
}
$this
->
readSocket
=
$read_socket
;
$this
->
writeSocket
=
$write_socket
;
}
public
function
__destruct
()
{
$this
->
closeSockets
();
}
/**
* Creates a pair of socket channels that are connected to each other. This
* is mostly useful for writing unit tests of, e.g., protocol channels.
*
* list($x, $y) = PhutilSocketChannel::newChannelPair();
*
* @task construct
*/
public
static
function
newChannelPair
()
{
$sockets
=
null
;
$domain
=
phutil_is_windows
()
?
STREAM_PF_INET
:
STREAM_PF_UNIX
;
$pair
=
stream_socket_pair
(
$domain
,
STREAM_SOCK_STREAM
,
STREAM_IPPROTO_IP
);
if
(!
$pair
)
{
throw
new
Exception
(
"stream_socket_pair() failed!"
);
}
$x
=
new
PhutilSocketChannel
(
$pair
[
0
]);
$y
=
new
PhutilSocketChannel
(
$pair
[
1
]);
return
array
(
$x
,
$y
);
}
public
function
isOpen
()
{
return
(
bool
)
$this
->
readSocket
;
}
protected
function
readBytes
()
{
$data
=
@
fread
(
$this
->
readSocket
,
4096
);
if
(
$data
===
false
)
{
$this
->
closeSockets
();
$data
=
''
;
}
// NOTE: fread() continues returning empty string after the socket is
// closed, we need to check for EOF explicitly.
if
(
$data
===
''
)
{
if
(
feof
(
$this
->
readSocket
))
{
$this
->
closeSockets
();
}
}
return
$data
;
}
protected
function
writeBytes
(
$bytes
)
{
$socket
=
$this
->
writeSocket
;
if
(!
$socket
)
{
$socket
=
$this
->
readSocket
;
}
$len
=
@
fwrite
(
$socket
,
$bytes
);
if
(
$len
===
false
)
{
$this
->
closeSockets
();
return
0
;
}
return
$len
;
}
protected
function
getReadSockets
()
{
return
array
(
$this
->
readSocket
);
}
protected
function
getWriteSockets
()
{
if
(
$this
->
isWriteBufferEmpty
())
{
return
array
();
}
else
if
(
$this
->
writeSocket
)
{
return
array
(
$this
->
writeSocket
);
}
else
{
return
array
(
$this
->
readSocket
);
}
}
private
function
closeSockets
()
{
foreach
(
array
(
$this
->
readSocket
,
$this
->
writeSocket
)
as
$socket
)
{
if
(!
$socket
)
{
continue
;
}
// We should also stream_socket_shutdown() here but HHVM throws errors
// with it (for example 'Unexpected object type PlainFile'). We depend
// just on fclose() until it is fixed.
@
fclose
(
$socket
);
}
$this
->
readSocket
=
null
;
$this
->
writeSocket
=
null
;
}
}
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