AmazonS3ResourceManager.php
public function fileExists($name)
	{
		$http = new \Guzzle\Http\Client();
		try {
			$response = $http->get($this->getUrl($name))->send();
		} catch(ClientErrorResponseException $e) {
			return false;
		}
		return $response->isSuccessful();
	}
public function fileExists($name)
	{
		$http = new \Guzzle\Http\Client();
		try {
			$response = $http->get($this->getUrl($name))->send();
		} catch(ClientErrorResponseException $e) {
			return false;
		}
		return $response->isSuccessful();
	}
Checks whether a file exists or not. This method only works for public resources, private resources will throw
a 403 error exception.
@param string $name the name of the file
@return boolean