/**
* {@inheritdoc}
*/
public function handle(CompositeConnectionInterface $connection, $payload)
{
$length = (int) $payload;
if ("{$length}" !== $payload) {
CommunicationException::handle(new ProtocolException($connection, "Cannot parse '{$payload}' as a valid length of a multi-bulk response."));
}
if ($length === -1) {
return;
}
$list = array();
if ($length > 0) {
$handlersCache = array();
$reader = $connection->getProtocol()->getResponseReader();
for ($i = 0; $i < $length; ++$i) {
$header = $connection->readLine();
$prefix = $header[0];
if (isset($handlersCache[$prefix])) {
$handler = $handlersCache[$prefix];
} else {
$handler = $reader->getHandler($prefix);
$handlersCache[$prefix] = $handler;
}
$list[$i] = $handler->handle($connection, substr($header, 1));
}
}
return $list;
}
/**
* {@inheritdoc}
*/
public function handle(CompositeConnectionInterface $connection, $payload)
{
$length = (int) $payload;
if ("{$length}" != $payload) {
CommunicationException::handle(new ProtocolException($connection, "Cannot parse '{$payload}' as a valid length for a multi-bulk response [{$connection->getParameters()}]"));
}
return new MultiBulkIterator($connection, $length);
}
/**
* {@inheritdoc}
*/
public function handle(CompositeConnectionInterface $connection, $payload)
{
if (is_numeric($payload)) {
$integer = (int) $payload;
return $integer == $payload ? $integer : $payload;
}
if ($payload !== 'nil') {
CommunicationException::handle(new ProtocolException($connection, "Cannot parse '{$payload}' as a valid numeric response [{$connection->getParameters()}]"));
}
return;
}
/**
* {@inheritdoc}
*/
public function read(CompositeConnectionInterface $connection)
{
$header = $connection->readLine();
if ($header === '') {
$this->onProtocolError($connection, 'Unexpected empty reponse header.');
}
$prefix = $header[0];
if (!isset($this->handlers[$prefix])) {
$this->onProtocolError($connection, "Unknown response prefix: '{$prefix}'.");
}
$payload = $this->handlers[$prefix]->handle($connection, substr($header, 1));
return $payload;
}
/**
* {@inheritdoc}
*/
public function handle(CompositeConnectionInterface $connection, $payload)
{
$length = (int) $payload;
if ("{$length}" !== $payload) {
CommunicationException::handle(new ProtocolException($connection, "Cannot parse '{$payload}' as a valid length for a bulk response."));
}
if ($length >= 0) {
return substr($connection->readBuffer($length + 2), 0, -2);
}
if ($length == -1) {
return null;
}
CommunicationException::handle(new ProtocolException($connection, "Value '{$payload}' is not a valid length for a bulk response."));
return;
}
/**
* {@inheritdoc}
*/
public function read(CompositeConnectionInterface $connection)
{
$chunk = $connection->readLine();
$prefix = $chunk[0];
$payload = substr($chunk, 1);
switch ($prefix) {
case '+':
return new StatusResponse($payload);
case '$':
$size = (int) $payload;
if ($size === -1) {
return;
}
return substr($connection->readBuffer($size + 2), 0, -2);
case '*':
$count = (int) $payload;
if ($count === -1) {
return;
}
if ($this->mbiterable) {
return new MultiBulkIterator($connection, $count);
}
$multibulk = array();
for ($i = 0; $i < $count; ++$i) {
$multibulk[$i] = $this->read($connection);
}
return $multibulk;
case ':':
$integer = (int) $payload;
return $integer == $payload ? $integer : $payload;
case '-':
return new ErrorResponse($payload);
default:
CommunicationException::handle(new ProtocolException($connection, "Unknown response prefix: '{$prefix}' [{$connection->getParameters()}]"));
return;
}
}
/**
* {@inheritdoc}
*/
public function write(CompositeConnectionInterface $connection, CommandInterface $command)
{
$connection->writeBuffer($this->serializer->serialize($command));
}
/**
* Handles protocol errors generated while reading responses from a
* connection.
*
* @param CompositeConnectionInterface $connection Redis connection that generated the error.
* @param string $message Error message.
*/
protected function onProtocolError(CompositeConnectionInterface $connection, $message)
{
CommunicationException::handle(new ProtocolException($connection, "{$message} [{$connection->getParameters()}]"));
}
