feat: add sftp driver (close #1466)

drivers/sftp/driver.go

@@ -0,0 +1,106 @@
+package sftp
+
+import (
+	"context"
+	"os"
+	"path"
+
+	"github.com/alist-org/alist/v3/internal/driver"
+	"github.com/alist-org/alist/v3/internal/errs"
+	"github.com/alist-org/alist/v3/internal/model"
+	"github.com/alist-org/alist/v3/pkg/utils"
+	"github.com/pkg/sftp"
+)
+
+type SFTP struct {
+	model.Storage
+	Addition
+	client *sftp.Client
+}
+
+func (d *SFTP) Config() driver.Config {
+	return config
+}
+
+func (d *SFTP) GetAddition() driver.Additional {
+	return d.Addition
+}
+
+func (d *SFTP) Init(ctx context.Context, storage model.Storage) error {
+	d.Storage = storage
+	err := utils.Json.UnmarshalFromString(d.Storage.Addition, &d.Addition)
+	if err != nil {
+		return err
+	}
+	return d.initClient()
+}
+
+func (d *SFTP) Drop(ctx context.Context) error {
+	if d.client != nil {
+		_ = d.client.Close()
+	}
+	return nil
+}
+
+func (d *SFTP) List(ctx context.Context, dir model.Obj, args model.ListArgs) ([]model.Obj, error) {
+	files, err := d.client.ReadDir(dir.GetPath())
+	if err != nil {
+		return nil, err
+	}
+	return utils.SliceConvert(files, func(src os.FileInfo) (model.Obj, error) {
+		return fileToObj(src), nil
+	})
+}
+
+//func (d *SFTP) Get(ctx context.Context, path string) (model.Obj, error) {
+//	// this is optional
+//	return nil, errs.NotImplement
+//}
+
+func (d *SFTP) Link(ctx context.Context, file model.Obj, args model.LinkArgs) (*model.Link, error) {
+	remoteFile, err := d.client.Open(file.GetPath())
+	if err != nil {
+		return nil, err
+	}
+	return &model.Link{
+		Data: remoteFile,
+	}, nil
+}
+
+func (d *SFTP) MakeDir(ctx context.Context, parentDir model.Obj, dirName string) error {
+	return d.client.MkdirAll(path.Join(parentDir.GetPath(), dirName))
+}
+
+func (d *SFTP) Move(ctx context.Context, srcObj, dstDir model.Obj) error {
+	return d.client.Rename(srcObj.GetPath(), path.Join(dstDir.GetPath(), srcObj.GetName()))
+}
+
+func (d *SFTP) Rename(ctx context.Context, srcObj model.Obj, newName string) error {
+	return d.client.Rename(srcObj.GetPath(), path.Join(path.Dir(srcObj.GetPath()), newName))
+}
+
+func (d *SFTP) Copy(ctx context.Context, srcObj, dstDir model.Obj) error {
+	return errs.NotSupport
+}
+
+func (d *SFTP) Remove(ctx context.Context, obj model.Obj) error {
+	return d.remove(obj.GetPath())
+}
+
+func (d *SFTP) Put(ctx context.Context, dstDir model.Obj, stream model.FileStreamer, up driver.UpdateProgress) error {
+	dstFile, err := d.client.Create(path.Join(dstDir.GetPath(), stream.GetName()))
+	if err != nil {
+		return err
+	}
+	defer func() {
+		_ = dstFile.Close()
+	}()
+	err = utils.CopyWithCtx(ctx, dstFile, stream, stream.GetSize(), up)
+	return err
+}
+
+func (d *SFTP) Other(ctx context.Context, args model.OtherArgs) (interface{}, error) {
+	return nil, errs.NotSupport
+}
+
+var _ driver.Driver = (*SFTP)(nil)