feat: sftp server support (#7643)

* feat: sftp server support

* fix(sftp-server): try fix build failed

* fix: sftp download lack

cmd/common.go

@@ -15,6 +15,7 @@ import (
 func Init() {
 	bootstrap.InitConfig()
 	bootstrap.Log()
+	bootstrap.InitHostKey()
 	bootstrap.InitDB()
 	data.InitData()
 	bootstrap.InitIndex()

cmd/server.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	ftpserver "github.com/KirCute/ftpserverlib-pasvportmap"
+	"github.com/KirCute/sftpd-alist"
 	"net"
 	"net/http"
 	"os"
@@ -131,6 +132,24 @@ the address is defined in config file`,
 				}()
 			}
 		}
+		var sftpDriver *server.SftpDriver
+		var sftpServer *sftpd.SftpServer
+		if conf.Conf.SFTP.Listen != "" && conf.Conf.SFTP.Enable {
+			var err error
+			sftpDriver, err = server.NewSftpDriver()
+			if err != nil {
+				utils.Log.Fatalf("failed to start sftp driver: %s", err.Error())
+			} else {
+				utils.Log.Infof("start sftp server on %s", conf.Conf.SFTP.Listen)
+				go func() {
+					sftpServer = sftpd.NewSftpServer(sftpDriver)
+					err = sftpServer.RunServer()
+					if err != nil {
+						utils.Log.Fatalf("problem sftp server listening: %s", err.Error())
+					}
+				}()
+			}
+		}
 		// Wait for interrupt signal to gracefully shutdown the server with
 		// a timeout of 1 second.
 		quit := make(chan os.Signal, 1)
@@ -181,6 +200,15 @@ the address is defined in config file`,
 				}
 			}()
 		}
+		if conf.Conf.SFTP.Listen != "" && conf.Conf.SFTP.Enable && sftpServer != nil && sftpDriver != nil {
+			wg.Add(1)
+			go func() {
+				defer wg.Done()
+				if err := sftpServer.Close(); err != nil {
+					utils.Log.Fatal("SFTP server shutdown err: ", err)
+				}
+			}()
+		}
 		wg.Wait()
 		utils.Log.Println("Server exit")
 	},