/**
* {@inheritdoc}
*/
public function serialize(CommandInterface $command)
{
$commandID = $command->getId();
$arguments = $command->getArguments();
$cmdlen = strlen($commandID);
$reqlen = count($arguments) + 1;
$buffer = "*{$reqlen}\r\n\${$cmdlen}\r\n{$commandID}\r\n";
for ($i = 0, $reqlen--; $i < $reqlen; ++$i) {
$argument = $arguments[$i];
$arglen = strlen($argument);
$buffer .= "\${$arglen}\r\n{$argument}\r\n";
}
return $buffer;
}
/**
* Checks if the specified command is supported by this connection class.
*
* @param CommandInterface $command Command instance.
*
* @throws NotSupportedException
*
* @return string
*/
protected function getCommandId(CommandInterface $command)
{
switch ($commandID = $command->getId()) {
case 'AUTH':
case 'SELECT':
case 'MULTI':
case 'EXEC':
case 'WATCH':
case 'UNWATCH':
case 'DISCARD':
case 'MONITOR':
throw new NotSupportedException("Command '{$commandID}' is not allowed by Webdis.");
default:
return $commandID;
}
}
/**
* Checks if a SORT command is a readable operation by parsing the arguments
* array of the specified commad instance.
*
* @param CommandInterface $command Command instance.
*
* @return bool
*/
protected function isSortReadOnly(CommandInterface $command)
{
$arguments = $command->getArguments();
return ($c = count($arguments)) === 1 ? true : $arguments[$c - 2] !== 'STORE';
}
/**
* {@inheritdoc}
*/
public function writeRequest(CommandInterface $command)
{
$commandID = $command->getId();
$arguments = $command->getArguments();
$cmdlen = strlen($commandID);
$reqlen = count($arguments) + 1;
$buffer = "*{$reqlen}\r\n\${$cmdlen}\r\n{$commandID}\r\n";
for ($i = 0, $reqlen--; $i < $reqlen; ++$i) {
$argument = $arguments[$i];
$arglen = strlen($argument);
$buffer .= "\${$arglen}\r\n{$argument}\r\n";
}
$this->write($buffer);
}
/**
* {@inheritdoc}
*/
public function writeRequest(CommandInterface $command)
{
$arguments = $command->getArguments();
array_unshift($arguments, $command->getId());
$this->write(phpiredis_format_command($arguments));
}
/**
* {@inheritdoc}
*/
public function getSlot(CommandInterface $command)
{
$slot = $command->getSlot();
if (!isset($slot) && isset($this->commands[$cmdID = $command->getId()])) {
$key = call_user_func($this->commands[$cmdID], $command);
if (isset($key)) {
$slot = $this->getSlotByKey($key);
$command->setSlot($slot);
}
}
return $slot;
}
/**
* Handles -ERR responses returned by Redis.
*
* @param CommandInterface $command Redis command that generated the error.
* @param ErrorResponseInterface $response Instance of the error response.
*
* @throws ServerException
*
* @return mixed
*/
protected function onErrorResponse(CommandInterface $command, ErrorResponseInterface $response)
{
if ($command instanceof ScriptCommand && $response->getErrorType() === 'NOSCRIPT') {
$eval = $this->createCommand('EVAL');
$eval->setRawArguments($command->getEvalArguments());
$response = $this->executeCommand($eval);
if (!$response instanceof ResponseInterface) {
$response = $command->parseResponse($response);
}
return $response;
}
if ($this->options->exceptions) {
throw new ServerException($response->getMessage());
}
return $response;
}
/**
* Applies the specified prefix to the key of a MIGRATE command.
*
* @param CommandInterface $command Command instance.
* @param string $prefix Prefix string.
*/
public static function migrate(CommandInterface $command, $prefix)
{
if ($arguments = $command->getArguments()) {
$arguments[2] = "{$prefix}{$arguments[2]}";
$command->setRawArguments($arguments);
}
}