blob: ffb5440da16585076adb6aea04c281eb9fd492fc (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
<?php
namespace GuzzleHttp\Psr7;
use Psr\Http\Message\StreamInterface;
/**
* Provides a read only stream that pumps data from a PHP callable.
*
* When invoking the provided callable, the PumpStream will pass the amount of
* data requested to read to the callable. The callable can choose to ignore
* this value and return fewer or more bytes than requested. Any extra data
* returned by the provided callable is buffered internally until drained using
* the read() function of the PumpStream. The provided callable MUST return
* false when there is no more data to read.
*/
class PumpStream implements StreamInterface
{
/** @var callable */
private $source;
/** @var int */
private $size;
/** @var int */
private $tellPos = 0;
/** @var array */
private $metadata;
/** @var BufferStream */
private $buffer;
/**
* @param callable $source Source of the stream data. The callable MAY
* accept an integer argument used to control the
* amount of data to return. The callable MUST
* return a string when called, or false on error
* or EOF.
* @param array $options Stream options:
* - metadata: Hash of metadata to use with stream.
* - size: Size of the stream, if known.
*/
public function __construct(callable $source, array $options = [])
{
$this->source = $source;
$this->size = isset($options['size']) ? $options['size'] : null;
$this->metadata = isset($options['metadata']) ? $options['metadata'] : [];
$this->buffer = new BufferStream();
}
public function __toString()
{
try {
return copy_to_string($this);
} catch (\Exception $e) {
return '';
}
}
public function close()
{
$this->detach();
}
public function detach()
{
$this->tellPos = false;
$this->source = null;
}
public function getSize()
{
return $this->size;
}
public function tell()
{
return $this->tellPos;
}
public function eof()
{
return !$this->source;
}
public function isSeekable()
{
return false;
}
public function rewind()
{
$this->seek(0);
}
public function seek($offset, $whence = SEEK_SET)
{
throw new \RuntimeException('Cannot seek a PumpStream');
}
public function isWritable()
{
return false;
}
public function write($string)
{
throw new \RuntimeException('Cannot write to a PumpStream');
}
public function isReadable()
{
return true;
}
public function read($length)
{
$data = $this->buffer->read($length);
$readLen = strlen($data);
$this->tellPos += $readLen;
$remaining = $length - $readLen;
if ($remaining) {
$this->pump($remaining);
$data .= $this->buffer->read($remaining);
$this->tellPos += strlen($data) - $readLen;
}
return $data;
}
public function getContents()
{
$result = '';
while (!$this->eof()) {
$result .= $this->read(1000000);
}
return $result;
}
public function getMetadata($key = null)
{
if (!$key) {
return $this->metadata;
}
return isset($this->metadata[$key]) ? $this->metadata[$key] : null;
}
private function pump($length)
{
if ($this->source) {
do {
$data = call_user_func($this->source, $length);
if ($data === false || $data === null) {
$this->source = null;
return;
}
$this->buffer->write($data);
$length -= strlen($data);
} while ($length > 0);
}
}
}
|
