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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
<?php
namespace GuzzleHttp\Handler;
use GuzzleHttp\Promise as P;
use GuzzleHttp\Promise\Promise;
use GuzzleHttp\Utils;
use Psr\Http\Message\RequestInterface;
/**
* Returns an asynchronous response using curl_multi_* functions.
*
* When using the CurlMultiHandler, custom curl options can be specified as an
* associative array of curl option constants mapping to values in the
* **curl** key of the provided request options.
*
* @property resource $_mh Internal use only. Lazy loaded multi-handle.
*/
class CurlMultiHandler
{
/** @var CurlFactoryInterface */
private $factory;
private $selectTimeout;
private $active;
private $handles = [];
private $delays = [];
private $options = [];
/**
* This handler accepts the following options:
*
* - handle_factory: An optional factory used to create curl handles
* - select_timeout: Optional timeout (in seconds) to block before timing
* out while selecting curl handles. Defaults to 1 second.
* - options: An associative array of CURLMOPT_* options and
* corresponding values for curl_multi_setopt()
*
* @param array $options
*/
public function __construct(array $options = [])
{
$this->factory = isset($options['handle_factory'])
? $options['handle_factory'] : new CurlFactory(50);
if (isset($options['select_timeout'])) {
$this->selectTimeout = $options['select_timeout'];
} elseif ($selectTimeout = getenv('GUZZLE_CURL_SELECT_TIMEOUT')) {
$this->selectTimeout = $selectTimeout;
} else {
$this->selectTimeout = 1;
}
$this->options = isset($options['options']) ? $options['options'] : [];
}
public function __get($name)
{
if ($name === '_mh') {
$this->_mh = curl_multi_init();
foreach ($this->options as $option => $value) {
// A warning is raised in case of a wrong option.
curl_multi_setopt($this->_mh, $option, $value);
}
// Further calls to _mh will return the value directly, without entering the
// __get() method at all.
return $this->_mh;
}
throw new \BadMethodCallException();
}
public function __destruct()
{
if (isset($this->_mh)) {
curl_multi_close($this->_mh);
unset($this->_mh);
}
}
public function __invoke(RequestInterface $request, array $options)
{
$easy = $this->factory->create($request, $options);
$id = (int) $easy->handle;
$promise = new Promise(
[$this, 'execute'],
function () use ($id) {
return $this->cancel($id);
}
);
$this->addRequest(['easy' => $easy, 'deferred' => $promise]);
return $promise;
}
/**
* Ticks the curl event loop.
*/
public function tick()
{
// Add any delayed handles if needed.
if ($this->delays) {
$currentTime = Utils::currentTime();
foreach ($this->delays as $id => $delay) {
if ($currentTime >= $delay) {
unset($this->delays[$id]);
curl_multi_add_handle(
$this->_mh,
$this->handles[$id]['easy']->handle
);
}
}
}
// Step through the task queue which may add additional requests.
P\queue()->run();
if ($this->active &&
curl_multi_select($this->_mh, $this->selectTimeout) === -1
) {
// Perform a usleep if a select returns -1.
// See: https://bugs.php.net/bug.php?id=61141
usleep(250);
}
while (curl_multi_exec($this->_mh, $this->active) === CURLM_CALL_MULTI_PERFORM);
$this->processMessages();
}
/**
* Runs until all outstanding connections have completed.
*/
public function execute()
{
$queue = P\queue();
while ($this->handles || !$queue->isEmpty()) {
// If there are no transfers, then sleep for the next delay
if (!$this->active && $this->delays) {
usleep($this->timeToNext());
}
$this->tick();
}
}
private function addRequest(array $entry)
{
$easy = $entry['easy'];
$id = (int) $easy->handle;
$this->handles[$id] = $entry;
if (empty($easy->options['delay'])) {
curl_multi_add_handle($this->_mh, $easy->handle);
} else {
$this->delays[$id] = Utils::currentTime() + ($easy->options['delay'] / 1000);
}
}
/**
* Cancels a handle from sending and removes references to it.
*
* @param int $id Handle ID to cancel and remove.
*
* @return bool True on success, false on failure.
*/
private function cancel($id)
{
// Cannot cancel if it has been processed.
if (!isset($this->handles[$id])) {
return false;
}
$handle = $this->handles[$id]['easy']->handle;
unset($this->delays[$id], $this->handles[$id]);
curl_multi_remove_handle($this->_mh, $handle);
curl_close($handle);
return true;
}
private function processMessages()
{
while ($done = curl_multi_info_read($this->_mh)) {
$id = (int) $done['handle'];
curl_multi_remove_handle($this->_mh, $done['handle']);
if (!isset($this->handles[$id])) {
// Probably was cancelled.
continue;
}
$entry = $this->handles[$id];
unset($this->handles[$id], $this->delays[$id]);
$entry['easy']->errno = $done['result'];
$entry['deferred']->resolve(
CurlFactory::finish(
$this,
$entry['easy'],
$this->factory
)
);
}
}
private function timeToNext()
{
$currentTime = Utils::currentTime();
$nextTime = PHP_INT_MAX;
foreach ($this->delays as $time) {
if ($time < $nextTime) {
$nextTime = $time;
}
}
return max(0, $nextTime - $currentTime) * 1000000;
}
}
|
