1
|
|
|
<?php |
2
|
|
|
/** |
3
|
|
|
* Created by PhpStorm. |
4
|
|
|
* User: tamaskovacs |
5
|
|
|
* Date: 2017. 01. 27. |
6
|
|
|
* Time: 21:45 |
7
|
|
|
*/ |
8
|
|
|
|
9
|
|
|
namespace Callisto; |
10
|
|
|
|
11
|
|
|
|
12
|
|
|
use Psr\Http\Message\StreamInterface; |
13
|
|
|
|
14
|
|
|
abstract class Psr7Stream implements StreamInterface |
15
|
|
|
{ |
16
|
|
|
/** |
17
|
|
|
* Connection resource. |
18
|
|
|
* |
19
|
|
|
* @var resource |
20
|
|
|
*/ |
21
|
|
|
protected $connection; |
22
|
|
|
|
23
|
|
|
|
24
|
|
|
/** |
25
|
|
|
* @throws \Exception |
26
|
|
|
*/ |
27
|
1 |
|
public function __toString() |
28
|
|
|
{ |
29
|
1 |
|
throw new \RuntimeException('Cannot read the entire stream.'); |
30
|
|
|
} |
31
|
|
|
|
32
|
|
|
/** |
33
|
|
|
* Closes the stream and any underlying resources. |
34
|
|
|
* |
35
|
|
|
* @return void |
36
|
|
|
*/ |
37
|
3 |
|
public function close() : void |
38
|
|
|
{ |
39
|
3 |
|
fclose($this->connection); |
40
|
3 |
|
} |
41
|
|
|
|
42
|
|
|
/** |
43
|
|
|
* Separates any underlying resources from the stream. |
44
|
|
|
* |
45
|
|
|
* After the stream has been detached, the stream is in an unusable state. |
46
|
|
|
* |
47
|
|
|
* @return resource|null Underlying PHP stream, if any |
48
|
|
|
*/ |
49
|
1 |
|
public function detach() |
50
|
|
|
{ |
51
|
1 |
|
$this->close(); |
52
|
1 |
|
return null; |
53
|
|
|
} |
54
|
|
|
|
55
|
|
|
/** |
56
|
|
|
* We do not know the size of the stream. |
57
|
|
|
* @return void |
58
|
|
|
* @throws \RuntimeException |
59
|
|
|
*/ |
60
|
1 |
|
public function getSize() : void |
61
|
|
|
{ |
62
|
1 |
|
throw new \RuntimeException('We no not know the size of the stream.'); |
63
|
|
|
} |
64
|
|
|
|
65
|
|
|
/** |
66
|
|
|
* We do not have the position of the cursor. |
67
|
|
|
* |
68
|
|
|
* @return void |
69
|
|
|
* @throws \RuntimeException on error. |
70
|
|
|
*/ |
71
|
1 |
|
public function tell() : void |
72
|
|
|
{ |
73
|
1 |
|
throw new \RuntimeException('We do not know the position of the cursor.'); |
74
|
|
|
} |
75
|
|
|
|
76
|
|
|
/** |
77
|
|
|
* Returns true if the stream is at the end of the stream. |
78
|
|
|
* |
79
|
|
|
* @return bool |
80
|
|
|
*/ |
81
|
9 |
|
public function eof() : bool |
82
|
|
|
{ |
83
|
9 |
|
return feof($this->connection); |
84
|
|
|
} |
85
|
|
|
|
86
|
|
|
/** |
87
|
|
|
* The stream is not seekable. |
88
|
|
|
* |
89
|
|
|
* @return bool |
90
|
|
|
*/ |
91
|
1 |
|
public function isSeekable() : bool |
92
|
|
|
{ |
93
|
1 |
|
return false; |
94
|
|
|
} |
95
|
|
|
|
96
|
|
|
/** |
97
|
|
|
* The stream is not seekable. |
98
|
|
|
* |
99
|
|
|
* @throws \RuntimeException on failure. |
100
|
|
|
*/ |
101
|
1 |
|
public function seek($offset, $whence = SEEK_SET) : void |
102
|
|
|
{ |
103
|
1 |
|
throw new \RuntimeException('The stream is not seekable.'); |
104
|
|
|
} |
105
|
|
|
|
106
|
|
|
/** |
107
|
|
|
* The stream cannot be rewind. |
108
|
|
|
* |
109
|
|
|
* @throws \RuntimeException on failure. |
110
|
|
|
*/ |
111
|
1 |
|
public function rewind() : void |
112
|
|
|
{ |
113
|
1 |
|
throw new \RuntimeException('The stream is not seekable therefore it cannot be rewind.'); |
114
|
|
|
} |
115
|
|
|
|
116
|
|
|
/** |
117
|
|
|
* Returns whether or not the stream is writable. |
118
|
|
|
* |
119
|
|
|
* @return bool |
120
|
|
|
*/ |
121
|
1 |
|
public function isWritable() : bool |
122
|
|
|
{ |
123
|
1 |
|
return true; |
124
|
|
|
} |
125
|
|
|
|
126
|
|
|
/** |
127
|
|
|
* Write data to the stream. |
128
|
|
|
* |
129
|
|
|
* @param string $string The string that is to be written. |
130
|
|
|
* @return int Returns the number of bytes written to the stream. |
131
|
|
|
* @throws \RuntimeException on failure. |
132
|
|
|
*/ |
133
|
9 |
|
public function write($string) : int |
134
|
|
|
{ |
135
|
9 |
|
$length = strlen($string); |
136
|
9 |
|
fwrite($this->connection, $string, $length); |
137
|
|
|
|
138
|
9 |
|
return $length; |
139
|
|
|
} |
140
|
|
|
|
141
|
|
|
/** |
142
|
|
|
* Returns whether or not the stream is readable. |
143
|
|
|
* |
144
|
|
|
* @return bool |
145
|
|
|
*/ |
146
|
1 |
|
public function isReadable() : bool |
147
|
|
|
{ |
148
|
1 |
|
return true; |
149
|
|
|
} |
150
|
|
|
|
151
|
|
|
/** |
152
|
|
|
* Read data from the stream. |
153
|
|
|
* |
154
|
|
|
* @param int $length Read up to $length bytes from the object and return |
155
|
|
|
* them. Fewer than $length bytes may be returned if underlying stream |
156
|
|
|
* call returns fewer bytes. |
157
|
|
|
* @return string Returns the data read from the stream, or an empty string |
158
|
|
|
* if no bytes are available. |
159
|
|
|
* @throws \RuntimeException if an error occurs. |
160
|
|
|
*/ |
161
|
3 |
|
public function read($length) |
162
|
|
|
{ |
163
|
3 |
|
return fread($this->connection, $length); |
164
|
|
|
} |
165
|
|
|
|
166
|
|
|
/** |
167
|
|
|
* Reads the next line fron the stream. |
168
|
|
|
* |
169
|
|
|
* @param int $length Read up to $length bytes from the object and return |
170
|
|
|
* them. Fewer than $length bytes may be returned if underlying stream |
171
|
|
|
* call returns fewer bytes. |
172
|
|
|
* @return string Returns the data read from the stream, or an empty string |
173
|
|
|
* if no bytes are available. |
174
|
|
|
* @throws \RuntimeException if an error occurs. |
175
|
|
|
*/ |
176
|
9 |
|
public function readLine($length = 1024) : string |
177
|
|
|
{ |
178
|
9 |
|
return (string)fgets($this->connection, $length); |
179
|
|
|
} |
180
|
|
|
|
181
|
|
|
/** |
182
|
|
|
* Returns the remaining contents in a string |
183
|
|
|
* |
184
|
|
|
* @return string |
185
|
|
|
* @throws \RuntimeException if unable to read or an error occurs while |
186
|
|
|
* reading. |
187
|
|
|
*/ |
188
|
1 |
|
public function getContents() |
189
|
|
|
{ |
190
|
1 |
|
throw new \RuntimeException('We cannot return the remaining contents of the stream.'); |
191
|
|
|
} |
192
|
|
|
|
193
|
|
|
/** |
194
|
|
|
* Get stream metadata as an associative array or retrieve a specific key. |
195
|
|
|
* |
196
|
|
|
* The keys returned are identical to the keys returned from PHP's |
197
|
|
|
* stream_get_meta_data() function. |
198
|
|
|
* |
199
|
|
|
* @link http://php.net/manual/en/function.stream-get-meta-data.php |
200
|
|
|
* @param string|null $key Specific metadata to retrieve. |
201
|
|
|
* @return array|mixed|null Returns an associative array if no key is |
202
|
|
|
* provided. Returns a specific key value if a key is provided and the |
203
|
|
|
* value is found, or null if the key is not found. |
204
|
|
|
*/ |
205
|
1 |
|
public function getMetadata($key = null) |
206
|
|
|
{ |
207
|
1 |
|
return stream_get_meta_data($this->connection); |
208
|
|
|
} |
209
|
|
|
} |