public function current()
{
if ($this->isLastChunk) {
return $this->applyChunkEncoding('');
} elseif (($current = $this->iterator->current()) === '') {
return null;
} elseif (is_string($current)) {
return $this->applyChunkEncoding($current);
} elseif ($current instanceof Promise) {
$future = new Future();
$current->when(function ($error, $result) use($future) {
if ($error) {
$future->fail($error);
} elseif (is_string($result)) {
$future->succeed($this->applyChunkEncoding($result));
} else {
$future->fail(new \DomainException(sprintf('Only string/Promise elements may be chunked; %s provided', gettype($result))));
}
});
return $future->promise();
} else {
// @TODO How to react to an invalid type returned from an iterator?
return null;
}
}
private function generateNaiveHeaders()
{
$future = new Future();
$this->generateNaiveLength()->when(function ($error, $result) use($future) {
if ($error) {
$future->fail($error);
} else {
$future->succeed(['Content-Length' => $result]);
}
});
return $future->promise();
}
/**
* Write iterator content to the socket.
*
* @param Reactor $reactor
* @param resource $socket
* @param mixed $iterator
* @throws \DomainException On invalid iterator element.
* @return \After\Promise
*/
public function write(Reactor $reactor, $socket, $iterator)
{
if (!$iterator->valid()) {
return new Success();
}
$this->reactor = $reactor;
$this->socket = $socket;
$this->iterator = $iterator;
$this->future = $future = new Future();
$this->writeNextElement();
return $future->promise();
}
private function checkoutNewSocket($uri, $options)
{
if ($this->allowsNewConnection($uri) || $this->needsRebind) {
$future = new Future($this->reactor);
$this->initializeNewConnection($future, $uri, $options);
$this->needsRebind = false;
return $future->promise();
} elseif (count($this->queuedSocketRequests) < $this->opMaxQueuedSockets) {
$future = new Future($this->reactor);
$this->queuedSocketRequests[$uri][] = [$future, $options];
return $future->promise();
} else {
return new Failure(new TooBusyException('Request rejected: too busy. Try upping the OP_MAX_QUEUE_SIZE setting.'));
}
}
private function sumMultipartFieldLengths(Reactor $reactor, array $fields)
{
$lengths = [];
foreach ($fields as $field) {
if (is_string($field)) {
$lengths[] = strlen($field);
} else {
$lengths[] = $field->getLength($reactor);
}
}
$future = new Future();
\After\all($lengths)->when(function ($error, $result) use($future) {
if ($error) {
$future->fail($error);
} else {
$future->succeed(array_sum($result));
}
});
return $future->promise();
}
