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docker-php/src/SocketClient/Stream.php at master · plesk/docker-php · GitHub
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Stream.php
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Stream.php
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<?php
namespace
Docker
\
SocketClient
;
use
Docker
\
SocketClient
\
Exception
\
StreamException
;
use
Docker
\
SocketClient
\
Exception
\
TimeoutException
;
use
Psr
\
Http
\
Message
\
StreamInterface
;
/**
* Stream implementation for Socket Client.
*
* This implementation is used to have a Stream which react better to the Socket Client behavior.
*
* The main advantage is you can get the response of a request even if it's not finish, the response is available
* as soon as all headers are received, this stream will have the remaining socket used for the request / response
* call.
*
* It is only readable once, if you want to read the content multiple times, you can store contents of this
* stream into a variable or encapsulate it in a buffered stream.
*
* Writing and seeking is disable to avoid weird behaviors.
*
* @author Joel Wurtz <joel.wurtz@gmail.com>
*/
class
Stream
implements
StreamInterface
{
/** @var resource Underlying socket */
private
$
socket
;
/**
* @var bool Is stream detached
*/
private
bool
$
isDetached
=
false
;
/**
* @var int|null Size of the stream, so we know what we must read, null if not available (i.e. a chunked stream)
*/
private
$
size
;
/**
* @var int Size of the stream readed, to avoid reading more than available and have the user blocked
*/
private
$
readed
=
0
;
/**
* Create the stream.
*
* @param resource $socket
* @param int $size
*/
public
function
__construct
(
$
socket
, ?
int
$
size
=
null
)
{
$
this
->
socket
=
$
socket
;
$
this
->
size
=
$
size
;
}
/**
* {@inheritdoc}
*/
public
function
__toString
():
string
{
try
{
return
$
this
->
getContents
();
}
catch
(
\
Exception
$
e
) {
return
''
;
}
}
/**
* {@inheritdoc}
*/
public
function
close
():
void
{
fclose
(
$
this
->
socket
);
}
/**
* {@inheritdoc}
*/
public
function
detach
()
{
$
this
->
isDetached
=
true
;
$
socket
=
$
this
->
socket
;
$
this
->
socket
=
null
;
return
$
socket
;
}
/**
* {@inheritdoc}
*/
public
function
getSize
(): ?
int
{
return
$
this
->
size
;
}
/**
* {@inheritdoc}
*/
public
function
tell
():
int
{
return
ftell
(
$
this
->
socket
);
}
/**
* {@inheritdoc}
*/
public
function
eof
():
bool
{
return
feof
(
$
this
->
socket
);
}
/**
* {@inheritdoc}
*/
public
function
isSeekable
():
bool
{
return
false
;
}
/**
* {@inheritdoc}
*/
public
function
seek
(
$
offset
,
$
whence
=
SEEK_SET
):
void
{
throw
new
StreamException
(
'
This stream is not seekable
'
);
}
/**
* {@inheritdoc}
*/
public
function
rewind
():
void
{
throw
new
StreamException
(
'
This stream is not seekable
'
);
}
/**
* {@inheritdoc}
*/
public
function
isWritable
():
bool
{
return
false
;
}
/**
* {@inheritdoc}
*/
public
function
write
(
$
string
):
int
{
throw
new
StreamException
(
'
This stream is not writable
'
);
}
/**
* {@inheritdoc}
*/
public
function
isReadable
():
bool
{
return
true
;
}
/**
* {@inheritdoc}
*/
public
function
read
(
$
length
):
string
{
if
(
null
===
$
this
->
getSize
()) {
return
fread
(
$
this
->
socket
,
$
length
);
}
if
(
$
this
->
getSize
() ===
$
this
->
readed
) {
return
''
;
}
// Even if we request a length a non blocking stream can return less data than asked
$
read
=
fread
(
$
this
->
socket
,
$
length
);
if
(
$
this
->
getMetadata
(
'
timed_out
'
)) {
throw
new
TimeoutException
(
'
Stream timed out while reading data
'
);
}
$
this
->
readed
+=
strlen
(
$
read
);
return
$
read
;
}
/**
* {@inheritdoc}
*/
public
function
getContents
():
string
{
if
(
null
===
$
this
->
getSize
()) {
return
stream_get_contents
(
$
this
->
socket
);
}
$
contents
=
''
;
do
{
$
contents
.=
$
this
->
read
(
$
this
->
getSize
() -
$
this
->
readed
);
}
while
(
$
this
->
readed
<
$
this
->
getSize
());
return
$
contents
;
}
/**
* {@inheritdoc}
*/
public
function
getMetadata
(
$
key
=
null
)
{
$
meta
=
stream_get_meta_data
(
$
this
->
socket
);
if
(
null
===
$
key
) {
return
$
meta
;
}
return
$
meta
[
$
key
];
}
}
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