private function send(string $message, callable $transform = null)
{
$promisor = new Deferred();
$this->connection->send($message);
$this->promisors[] = $promisor;
return $transform ? pipe($promisor->promise(), $transform) : $promisor->promise();
}
public function current()
{
if ($this->isLastChunk) {
return $this->applyChunkEncoding('');
} elseif (($current = $this->iterator->current()) === '') {
return null;
} elseif (is_string($current)) {
return $this->applyChunkEncoding($current);
} elseif ($current instanceof Promise) {
$promisor = new Deferred();
$current->when(function ($error, $result) use($promisor) {
if ($error) {
$promisor->fail($error);
} elseif (is_string($result)) {
$promisor->succeed($this->applyChunkEncoding($result));
} else {
$promisor->fail(new \DomainException(sprintf('Only string/Promise elements may be chunked; %s provided', gettype($result))));
}
});
return $promisor->promise();
} else {
// @TODO How to react to an invalid type returned from an iterator?
return null;
}
}
public function getRoomSessionInfo(Identifier $identifier) : Promise
{
$deferred = new Deferred();
$this->queue->push([$identifier, $deferred]);
if (!$this->haveLoop) {
resolve($this->executeActionsFromQueue());
}
return $deferred->promise();
}
private function connect()
{
// If we're in the process of connecting already return that same promise
if ($this->connectPromisor) {
return $this->connectPromisor->promise();
}
// If a read watcher exists we know we're already connected
if ($this->readWatcher) {
return new Success($this);
}
$this->connectPromisor = new Deferred();
$socketPromise = connect($this->uri, ["timeout" => $this->timeout]);
$onWrite = function ($watcherId) {
if ($this->outputBufferLength === 0) {
disable($watcherId);
return;
}
$bytes = @fwrite($this->socket, $this->outputBuffer);
if ($bytes === 0) {
$this->onError(new ConnectException("Connection went away (write)", $code = 1));
} else {
$this->outputBuffer = (string) substr($this->outputBuffer, $bytes);
$this->outputBufferLength -= $bytes;
}
};
$socketPromise->when(function ($error, $socket) use($onWrite) {
$connectPromisor = $this->connectPromisor;
$this->connectPromisor = null;
if ($error) {
$connectPromisor->fail(new ConnectException("Connection attempt failed", $code = 0, $error));
return;
}
$this->socket = $socket;
foreach ($this->handlers["connect"] as $handler) {
$pipelinedCommand = $handler();
if (!empty($pipelinedCommand)) {
$this->outputBuffer = $pipelinedCommand . $this->outputBuffer;
$this->outputBufferLength += strlen($pipelinedCommand);
}
}
$this->readWatcher = onReadable($this->socket, function () {
$read = fread($this->socket, 8192);
if ($read != "") {
$this->parser->append($read);
} elseif (!is_resource($this->socket) || @feof($this->socket)) {
$this->onError(new ConnectException("Connection went away (read)", $code = 2));
}
});
$this->writeWatcher = onWritable($this->socket, $onWrite, ["enable" => !empty($this->outputBuffer)]);
$connectPromisor->succeed();
});
return $this->connectPromisor->promise();
}
protected function genericFetch(callable $cb = null)
{
if ($this->result->userFetched < $this->result->fetchedRows) {
$row = $this->result->rows[$this->result->userFetched++];
return new Success($cb ? $cb($row) : $row);
} elseif ($this->result->state == ResultProxy::ROWS_FETCHED) {
return new Success(null);
} else {
$deferred = new Deferred();
$this->result->deferreds[ResultProxy::SINGLE_ROW_FETCH][] = [$deferred, null, $cb];
return $deferred->promise();
}
}
/**
* 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 Deferred();
$this->getLength()->when(function ($error, $result) use($promisor) {
if ($error) {
$promisor->fail($error);
} else {
$promisor->succeed(['Content-Length' => $result]);
}
});
return $promisor->promise();
}
public function log(int $logLevel, string $message, $extraData = null) : Promise
{
if (!$this->meetsLogLevel($logLevel)) {
return new Success();
}
$messages = [$message];
if ($extraData !== null && $this->meetsLogLevel(Level::EXTRA_DATA)) {
$messages[] = json_encode($extraData);
}
$this->writeQueue->push([(new \DateTime())->format('Y-m-d H:i:s'), $messages, $deferred = new Deferred()]);
if (!$this->haveWriteLoop) {
resolve($this->writeMessagesFromQueue());
}
return $deferred->promise();
}
private function requestNonce(string $uri) : Promise
{
$deferred = new Deferred();
$request = (new Request())->setMethod("HEAD")->setUri($uri);
$this->http->request($request)->when(function (Throwable $error = null, Response $response = null) use($deferred) {
if ($error) {
$deferred->fail(new AcmeException("Couldn't fetch nonce!", $error));
} else {
if (!$response->hasHeader("replay-nonce")) {
$deferred->fail(new AcmeException("Server didn't send required replay-nonce header!"));
}
list($nonce) = $response->getHeader("replay-nonce");
$deferred->succeed($nonce);
}
});
return $deferred->promise();
}
public function update(string $key, int $user, int $change) : Promise
{
$promisor = new Deferred();
$this->redis->hIncrBy($key, $user, $change)->when(function ($error, $result) use($key, $user, $promisor) {
if ($error) {
$promisor->fail($error);
} else {
if ($result) {
$promisor->succeed($result);
} else {
$promisor->succeed(pipe($this->redis->hDel($key, $user), function () use($result) {
return $result;
}));
}
}
});
return $promisor->promise();
}
public function save(string $id, array $data, int $ttl) : Promise
{
$promisor = new Deferred();
parent::save($id, $data, $ttl)->when(function ($error, $result) use($id, $data, $promisor) {
if ($error) {
$promisor->fail($error);
} else {
$data = json_encode($data);
$this->client->publish("sess:update", "{$id} {$data}")->when(function ($error) use($result, $promisor) {
if ($error) {
$promisor->fail(new Exception("failed to publish update", 0, $error));
} else {
$promisor->succeed($result);
}
});
}
});
return $promisor->promise();
}
private function requestNonce($uri)
{
if (!is_string($uri)) {
throw new InvalidArgumentException(sprintf("\$uri must be of type string, %s given.", gettype($uri)));
}
$deferred = new Deferred();
$request = (new Request())->setMethod("HEAD")->setUri($uri);
$this->http->request($request)->when(function ($error = null, Response $response = null) use($deferred, $uri) {
if ($error) {
$deferred->fail(new AcmeException("HEAD request to {$uri} failed, could not obtain a replay nonce.", null, $error));
} else {
if (!$response->hasHeader("replay-nonce")) {
$deferred->fail(new AcmeException("HTTP response didn't carry replay-nonce header."));
}
list($nonce) = $response->getHeader("replay-nonce");
$deferred->succeed($nonce);
}
});
return $deferred->promise();
}
/**
* Succeeds with true if an emitted value is available by calling getCurrent() or false if the observable has
* resolved. If the observable fails, the returned promise will fail with the same exception.
*
* @return \Interop\Async\Promise<bool>
*/
public function next() : Promise
{
if (isset($this->deferreds[$this->position])) {
$future = $this->deferreds[$this->position];
unset($this->values[$this->position], $this->deferreds[$this->position]);
$future->resolve();
}
++$this->position;
if (\array_key_exists($this->position, $this->values)) {
return new Success(true);
}
if ($this->resolved) {
--$this->position;
if ($this->exception) {
return new Failure($this->exception);
}
return new Success(false);
}
$this->deferred = new Deferred();
return $this->deferred->promise();
}
private function loadFile(string $filePath) : \Generator
{
if (isset($this->loadPromises[$filePath])) {
(yield $this->loadPromises[$filePath]);
return $this->dataCache[$filePath];
}
$deferred = new Deferred();
$this->loadPromises[$filePath] = $deferred->promise();
$this->lockMutexes[$filePath] = new QueuedExclusiveMutex();
return (yield $this->lockMutexes[$filePath]->withLock(function () use($filePath, $deferred) {
try {
// we may have been waiting on a lock and it's been populated by now
if (!isset($this->dataCache[$filePath])) {
$this->dataCache[$filePath] = (yield exists($filePath)) ? json_try_decode((yield get($filePath)), true) : [];
}
} catch (\Throwable $e) {
$this->dataCache[$filePath] = [];
} finally {
$deferred->succeed();
unset($this->loadPromises[$filePath]);
}
return $this->dataCache[$filePath];
}));
}
public function getFields()
{
if ($this->result->state >= ResultProxy::COLUMNS_FETCHED) {
return new Success($this->result->columns);
} elseif (isset($this->result->deferreds[ResultProxy::COLUMNS_FETCHED][0])) {
return $this->result->deferreds[ResultProxy::COLUMNS_FETCHED][0][0]->promise();
} else {
$deferred = new Deferred();
$this->result->deferreds[ResultProxy::COLUMNS_FETCHED][0] = [$deferred, &$this->result->columns, null];
return $deferred->promise();
}
}
public function send($socket)
{
$deferred = new Deferred();
stream_set_blocking($socket, false);
$data = $this->getRequest();
\Amp\onWritable($socket, function ($writer, $socket) use($deferred, &$data) {
if ($bytes = fwrite($socket, $data)) {
if ($bytes < \strlen($data)) {
$data = substr($data, $bytes);
return;
}
$size = 8192;
\Amp\onReadable($socket, function ($reader, $socket) use($deferred, &$size) {
/* make attention to not read too much data */
$data = stream_socket_recvfrom($socket, $size, STREAM_PEEK);
if (false === ($pos = strpos($data, "\r\n\r\n"))) {
if (\strlen($data) == $size) {
$size *= 2;
// unbounded??
}
return;
}
\Amp\cancel($reader);
$deferred->succeed($this->parseResponse(fread($socket, $pos + 4)));
});
} else {
$deferred->succeed(null);
}
\Amp\cancel($writer);
});
return $deferred->promise();
}
private function initField($field, $metadata = [])
{
if ($this->inputVarCount++ == $this->maxInputVars || \strlen($field) > $this->maxFieldLen) {
$this->fail();
return null;
}
$this->curSizes[$field] = 0;
$this->usedSize += \strlen($field);
if ($this->usedSize > $this->size) {
$this->fail();
return null;
}
if (isset($this->bodyPromisors[$field])) {
$key = key($this->bodyPromisors[$field]);
list($dataPromisor, $metadataPromisor) = $this->bodyPromisors[$field][$key];
$metadataPromisor->succeed($metadata);
unset($this->bodyPromisors[$field]);
} else {
$dataPromisor = new Deferred();
$this->bodies[$field][] = new FieldBody($dataPromisor->promise(), new Success($metadata));
}
foreach ($this->watchers as list($cb, $cbData)) {
$cb($field, $cbData);
}
return $dataPromisor;
}
protected function genericFetch(callable $cb = null)
{
if ($this->result->userFetched < $this->result->fetchedRows) {
$row = $this->result->rows[$this->result->userFetched++];
return new Success($cb ? $cb($row) : $row);
} elseif ($this->result->state == ResultProxy::ROWS_FETCHED) {
return new Success(null);
} else {
$deferred = new Deferred();
/* We need to increment the internal counter, else the next time genericFetch is called,
* it'll simply return the row we fetch here instead of fetching a new row
* since callback order on promises isn't defined, we can't do this via when() */
$incRow = function ($row) use($cb) {
$this->result->userFetched++;
return $cb && $row ? $cb($row) : $row;
};
$this->result->deferreds[ResultProxy::SINGLE_ROW_FETCH][] = [$deferred, null, $incRow];
return $deferred->promise();
}
}
/**
* {@inheritdoc}
*/
public function put($path, $contents)
{
$flags = \EIO_O_RDWR | \EIO_O_CREAT;
$mode = \EIO_S_IRUSR | \EIO_S_IWUSR | \EIO_S_IXUSR;
$priority = \EIO_PRI_DEFAULT;
$this->incrementPending();
$promisor = new Deferred();
$data = [$contents, $promisor];
\eio_open($path, $flags, $mode, $priority, [$this, "onPutOpen"], $data);
return $promisor->promise();
}
private function loadNewServer($uri)
{
if (!($socket = @\stream_socket_client($uri, $errno, $errstr, 0, STREAM_CLIENT_ASYNC_CONNECT))) {
throw new ResolutionException(sprintf("Connection to %s failed: [Error #%d] %s", $uri, $errno, $errstr));
}
\stream_set_blocking($socket, false);
$id = (int) $socket;
$server = new \StdClass();
$server->id = $id;
$server->uri = $uri;
$server->socket = $socket;
$server->buffer = "";
$server->length = INF;
$server->pendingRequests = [];
$server->watcherId = \Amp\onReadable($socket, $this->makePrivateCallable("onReadable"), ["enable" => true, "keep_alive" => true]);
$this->serverIdMap[$id] = $server;
$this->serverUriMap[$uri] = $server;
if (substr($uri, 0, 6) == "tcp://") {
$promisor = new Deferred();
$server->connect = $promisor->promise();
$watcher = \Amp\onWritable($server->socket, static function ($watcher) use($server, $promisor, &$timer) {
\Amp\cancel($watcher);
\Amp\cancel($timer);
unset($server->connect);
$promisor->succeed();
});
$timer = \Amp\once(function () use($id, $promisor, $watcher, $uri) {
\Amp\cancel($watcher);
$this->unloadServer($id);
$promisor->fail(new TimeoutException("Name resolution timed out, could not connect to server at {$uri}"));
}, 5000);
}
return $server;
}
/** @see 14.8.4 COM_STMT_FETCH */
public function fetchStmt($stmtId)
{
$payload = " " . DataTypes::encode_int32($stmtId) . DataTypes::encode_int32(1);
$deferred = new Deferred();
$this->appendTask(function () use($payload, $deferred) {
$this->out[] = null;
$this->deferreds[] = $deferred;
$this->sendPacket($payload);
$this->enableRead();
});
return $deferred->promise();
}
/**
* Write data to the socket
*
* Upon write completion the returned promise will resolve to an integer indicating
* the number of bytes written. If no bytes were written prior to disconnection the
* returned promise resolves to NULL.
*
* @param string $data
* @return \Amp\Promise<int|null>
*/
public function write($data)
{
$len = \strlen($data);
if (!($len && \is_string($data))) {
return new amp\Failure(new \LogicException("String of minimum length 1 required"));
}
$state = $this->state;
if (!$this->alive()) {
return new amp\Success(null);
}
if (empty($state->isWriteEnabled)) {
amp\enable($this->state->writeWatcherId);
$state->isWriteEnabled = true;
}
$op = new \StdClass();
$op->buffer = $data;
$op->size = $len;
$op->bytesWritten = null;
$op->promisor = $promisor = new amp\Deferred();
$state->writeOperations[] = $op;
return $promisor->promise();
}
private function enqueueAction(callable $callable, Identifier $identifier, ...$args) : Promise
{
$ident = $identifier->getIdentString();
if (!isset($this->actionQueues[$ident])) {
$queue = new Queue();
$this->actionQueues[$ident] = ['queue' => $queue, 'running' => false];
} else {
$queue = $this->actionQueues[$ident]['queue'];
}
$queue->push([$callable, $args, $deferred = new Deferred()]);
if (!$this->actionQueues[$ident]['running']) {
resolve($this->executeActionsFromQueue($identifier));
}
return $deferred->promise();
}
/**
* 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 Deferred();
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 $promisor->promise();
}
function __doRequest($state, $uri, $name, $type)
{
$server = __loadExistingServer($state, $uri) ?: __loadNewServer($state, $uri);
// Get the next available request ID
do {
$requestId = $state->requestIdCounter++;
if ($state->requestIdCounter >= MAX_REQUEST_ID) {
$state->requestIdCounter = 1;
}
} while (isset($state->pendingRequests[$requestId]));
// Create question record
$question = $state->questionFactory->create($type);
$question->setName($name);
// Create request message
$request = $state->messageFactory->create(MessageTypes::QUERY);
$request->getQuestionRecords()->add($question);
$request->isRecursionDesired(true);
$request->setID($requestId);
// Encode request message
$requestPacket = $state->encoder->encode($request);
if (substr($uri, 0, 6) == "tcp://") {
$requestPacket = pack("n", strlen($requestPacket)) . $requestPacket;
}
// Send request
$bytesWritten = \fwrite($server->socket, $requestPacket);
if ($bytesWritten === false || isset($packet[$bytesWritten])) {
throw new ResolutionException("Request send failed");
}
$promisor = new Deferred();
$server->pendingRequests[$requestId] = true;
$state->pendingRequests[$requestId] = [$promisor, $name, $type, $uri];
return $promisor->promise();
}
public function eval(Command $command) : Promise
{
if (!$command->hasParameters()) {
return new Success();
}
$code = $this->normalizeCode($command->getText());
$body = (new FormBody())->addField("title", "")->addField("code", $code);
$request = (new HttpRequest())->setUri("https://3v4l.org/new")->setMethod("POST")->setHeader("Accept", "application/json")->setBody($body);
$deferred = new Deferred();
$this->queue->push([$request, $command->getRoom(), $deferred]);
if (!$this->haveLoop) {
resolve($this->executeActionsFromQueue());
}
return $deferred->promise();
}
/**
* @param string $pattern
* @return Promise
*/
public function pSubscribe($pattern)
{
$promisor = new Deferred();
$promise = $this->connection->send(["psubscribe", $pattern]);
$promise->when(function ($error) use($pattern, $promisor) {
if ($error) {
$promisor->fail($error);
} else {
$this->patternPromisors[$pattern][] = $promisor;
$promisor->promise()->when(function () use($pattern) {
array_shift($this->patternPromisors[$pattern]);
});
}
});
return $promisor->promise();
}
private function sumMultipartFieldLengths(array $fields)
{
$lengths = [];
foreach ($fields as $field) {
if (is_string($field)) {
$lengths[] = strlen($field);
} else {
$lengths[] = $field->getLength();
}
}
$promisor = new Deferred();
\Amp\all($lengths)->when(function ($error, $result) use($promisor) {
if ($error) {
$promisor->fail($error);
} else {
$promisor->succeed(array_sum($result));
}
});
return $promisor->promise();
}
/**
* Unlocks the session, reloads data without saving
* @return \Amp\Promise resolving to an array with current session data
*/
public function unlock(string $id) : Promise
{
$token = $this->locks[$id] ?? "";
if (!$token) {
return new Success();
}
$promisor = new Deferred();
$this->mutex->unlock($id, $token)->when(function ($error) use($id, $promisor) {
if ($error) {
$promisor->fail(new Exception("couldn't unlock session", 0, $error));
} else {
unset($this->locks[$id]);
$promisor->succeed();
}
});
return $promisor->promise();
}
private function doPut($path, $contents) : \Generator
{
$flags = \UV::O_WRONLY | \UV::O_CREAT;
$mode = \UV::S_IRWXU | \UV::S_IRUSR;
$this->reactor->addRef();
$promise = $this->doFsOpen($path, $flags, $mode);
if (!($fh = (yield $promise))) {
$this->reactor->delRef();
throw new \RuntimeException("Failed opening write file handle");
}
$promisor = new Deferred();
$len = strlen($contents);
\uv_fs_write($this->loop, $fh, $contents, $offset = 0, function ($fh, $result) use($promisor, $len) {
\uv_fs_close($this->loop, $fh, function () use($promisor, $result, $len) {
$this->reactor->delRef();
if ($result < 0) {
$promisor->fail(new \RuntimeException(uv_strerror($result)));
} else {
$promisor->succeed($len);
}
});
});
(yield new \Amp\CoroutineResult((yield $promisor->promise())));
}
/**
* {@inheritdoc}
*/
public function put($path, $contents)
{
$flags = \EIO_O_WRONLY | \EIO_O_CREAT | \EIO_O_TRUNC;
$mode = 0666;
$priority = \EIO_PRI_DEFAULT;
\call_user_func($this->incrementor, 1);
$promisor = new Deferred();
$data = [$contents, $promisor];
\eio_open($path, $flags, $mode, $priority, [$this, "onPutOpen"], $data);
return $promisor->promise();
}
