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;
}
}
/**
* Return a key-value array of headers to add to the outbound request
*
* @return \Amp\Promise
* @TODO
*/
public function getHeaders()
{
// @TODO Implement non-blocking php-uv header retrieval.
// For now we'll just use the dumb blocking version.
// v1.0.0 cannot be a thing until this is implemented.
$promisor = new Future();
$this->getLength()->when(function ($error, $result) use($promisor) {
if ($error) {
$promisor->fail($error);
} else {
$promisor->succeed(['Content-Length' => $result]);
}
});
return $promisor->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);
}
}
/**
* Asynchronously request an HTTP resource
*
* @param mixed[string|\Amp\Artax\Request] An HTTP URI string or an \Amp\Artax\Request instance
* @param array $options An array specifying options applicable only for this request
* @return \Amp\Promise A promise to resolve the request at some point in the future
*/
public function request($uriOrRequest, array $options = [])
{
$promisor = new Future();
try {
$cycle = new RequestCycle();
$cycle->futureResponse = $promisor;
list($cycle->request, $cycle->uri) = $this->generateRequestFromUri($uriOrRequest);
$cycle->options = $options ? array_merge($this->options, $options) : $this->options;
$body = $cycle->request->getBody();
if ($body instanceof AggregateBody) {
$this->processAggregateBody($cycle, $body);
} else {
$this->finalizeRequest($cycle);
}
} catch (\Exception $e) {
$promisor->fail($e);
}
return $promisor->promise();
}
private function acceptNewTask(\Stackable $task)
{
$future = new Future($this->reactor);
$promiseId = $this->nextId++;
$this->queue[$promiseId] = [$future, $task];
$this->outstandingTaskCount++;
if ($this->isPeriodWatcherEnabled === false) {
$this->now = microtime(true);
$this->reactor->enable($this->timeoutWatcher);
$this->isPeriodWatcherEnabled = true;
}
if ($this->taskTimeout > -1) {
$timeoutAt = $this->taskTimeout + $this->now;
$this->promiseTimeoutMap[$promiseId] = $timeoutAt;
}
if ($this->availableWorkers) {
$this->dequeueNextTask();
} elseif ($this->poolSize + $this->pendingWorkerCount < $this->poolSizeMax) {
$this->spawnWorker();
}
return $future->promise();
}
private function finalizeNewConnection(Future $future, $uri, $socket, $options)
{
if (--$this->pendingSockets[$uri] === 0) {
unset($this->pendingSockets[$uri]);
}
$socketId = (int) $socket;
$poolStruct = new SocketPoolStruct();
$poolStruct->id = $socketId;
$poolStruct->uri = $uri;
$poolStruct->resource = $socket;
$poolStruct->isAvailable = false;
$poolStruct->msIdleTimeout = $options[self::OP_MS_IDLE_TIMEOUT];
$this->sockets[$uri][$socketId] = $poolStruct;
$this->socketIdUriMap[$socketId] = $uri;
$future->succeed($poolStruct->resource);
if (empty($this->queuedSocketRequests[$uri])) {
unset($this->queuedSocketRequests[$uri]);
}
}
private function sumMultipartFieldLengths(array $fields)
{
$lengths = [];
foreach ($fields as $field) {
if (is_string($field)) {
$lengths[] = strlen($field);
} else {
$lengths[] = $field->getLength();
}
}
$promisor = new Future();
\Amp\all($lengths)->when(function ($error, $result) use($promisor) {
if ($error) {
$promisor->fail($error);
} else {
$promisor->succeed(array_sum($result));
}
});
return $promisor->promise();
}