seaweedfs/weed/ftpd/ftp_server.go

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package ftpd
import (
"crypto/tls"
"errors"
"net"
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"github.com/chrislusf/seaweedfs/weed/util"
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ftpserver "github.com/fclairamb/ftpserverlib"
"google.golang.org/grpc"
)
type FtpServerOption struct {
Filer string
IP string
IpBind string
Port int
FilerGrpcAddress string
FtpRoot string
GrpcDialOption grpc.DialOption
PassivePortStart int
PassivePortStop int
}
type SftpServer struct {
option *FtpServerOption
ftpListener net.Listener
}
var _ = ftpserver.MainDriver(&SftpServer{})
// NewServer returns a new FTP server driver
func NewFtpServer(ftpListener net.Listener, option *FtpServerOption) (*SftpServer, error) {
var err error
server := &SftpServer{
option: option,
ftpListener: ftpListener,
}
return server, err
}
// GetSettings returns some general settings around the server setup
func (s *SftpServer) GetSettings() (*ftpserver.Settings, error) {
var portRange *ftpserver.PortRange
if s.option.PassivePortStart > 0 && s.option.PassivePortStop > s.option.PassivePortStart {
portRange = &ftpserver.PortRange{
Start: s.option.PassivePortStart,
End: s.option.PassivePortStop,
}
}
return &ftpserver.Settings{
Listener: s.ftpListener,
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ListenAddr: util.JoinHostPort(s.option.IpBind, s.option.Port),
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PublicHost: s.option.IP,
PassiveTransferPortRange: portRange,
ActiveTransferPortNon20: true,
IdleTimeout: -1,
ConnectionTimeout: 20,
}, nil
}
// ClientConnected is called to send the very first welcome message
func (s *SftpServer) ClientConnected(cc ftpserver.ClientContext) (string, error) {
return "Welcome to SeaweedFS FTP Server", nil
}
// ClientDisconnected is called when the user disconnects, even if he never authenticated
func (s *SftpServer) ClientDisconnected(cc ftpserver.ClientContext) {
}
// AuthUser authenticates the user and selects an handling driver
func (s *SftpServer) AuthUser(cc ftpserver.ClientContext, username, password string) (ftpserver.ClientDriver, error) {
return nil, nil
}
// GetTLSConfig returns a TLS Certificate to use
// The certificate could frequently change if we use something like "let's encrypt"
func (s *SftpServer) GetTLSConfig() (*tls.Config, error) {
return nil, errors.New("no TLS certificate configured")
}