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();
}
private function tunnelThroughProxy(Future $future, $socket, $authority)
{
if (empty(stream_context_get_options($socket)['artax*']['is_tunneled'])) {
$futureTunnel = $this->tunneler->tunnel($socket, $authority);
$futureTunnel->when(function ($error) use($future, $socket) {
if ($error) {
$future->fail($error);
} else {
$future->succeed($socket);
}
});
} else {
$future->succeed($socket);
}
}
private function initializeNewConnection(Future $future, $uri, $options)
{
$futureSocket = $this->connector->connect($uri, $options);
$futureSocket->when(function ($error, $socket) use($future, $uri) {
if ($error) {
$future->fail($error);
} else {
$this->finalizeNewConnection($future, $uri, $socket);
}
});
}
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();
}
