seaweedfs/weed/s3api/filer_util.go

package s3api

import (
	"context"
	"fmt"
	"io"
	"os"
	"strings"
	"time"

	"github.com/chrislusf/seaweedfs/weed/glog"
	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
)

func (s3a *S3ApiServer) mkdir(parentDirectoryPath string, dirName string, fn func(entry *filer_pb.Entry)) error {
	return s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {

		entry := &filer_pb.Entry{
			Name:        dirName,
			IsDirectory: true,
			Attributes: &filer_pb.FuseAttributes{
				Mtime:    time.Now().Unix(),
				Crtime:   time.Now().Unix(),
				FileMode: uint32(0777 | os.ModeDir),
				Uid:      OS_UID,
				Gid:      OS_GID,
			},
		}

		if fn != nil {
			fn(entry)
		}

		request := &filer_pb.CreateEntryRequest{
			Directory: parentDirectoryPath,
			Entry:     entry,
		}

		glog.V(1).Infof("mkdir: %v", request)
		if err := filer_pb.CreateEntry(client, request); err != nil {
			glog.V(0).Infof("mkdir %v: %v", request, err)
			return fmt.Errorf("mkdir %s/%s: %v", parentDirectoryPath, dirName, err)
		}

		return nil
	})
}

func (s3a *S3ApiServer) mkFile(parentDirectoryPath string, fileName string, chunks []*filer_pb.FileChunk) error {
	return s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {

		entry := &filer_pb.Entry{
			Name:        fileName,
			IsDirectory: false,
			Attributes: &filer_pb.FuseAttributes{
				Mtime:    time.Now().Unix(),
				Crtime:   time.Now().Unix(),
				FileMode: uint32(0770),
				Uid:      OS_UID,
				Gid:      OS_GID,
			},
			Chunks: chunks,
		}

		request := &filer_pb.CreateEntryRequest{
			Directory: parentDirectoryPath,
			Entry:     entry,
		}

		glog.V(1).Infof("create file: %s/%s", parentDirectoryPath, fileName)
		if err := filer_pb.CreateEntry(client, request); err != nil {
			glog.V(0).Infof("create file %v:%v", request, err)
			return fmt.Errorf("create file %s/%s: %v", parentDirectoryPath, fileName, err)
		}

		return nil
	})
}

func (s3a *S3ApiServer) list(parentDirectoryPath, prefix, startFrom string, inclusive bool, limit int) (entries []*filer_pb.Entry, err error) {

	err = s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {

		request := &filer_pb.ListEntriesRequest{
			Directory:          parentDirectoryPath,
			Prefix:             prefix,
			StartFromFileName:  startFrom,
			InclusiveStartFrom: inclusive,
			Limit:              uint32(limit),
		}

		glog.V(4).Infof("read directory: %v", request)
		stream, err := client.ListEntries(context.Background(), request)
		if err != nil {
			glog.V(0).Infof("read directory %v: %v", request, err)
			return fmt.Errorf("list dir %v: %v", parentDirectoryPath, err)
		}

		for {
			resp, recvErr := stream.Recv()
			if recvErr != nil {
				if recvErr == io.EOF {
					break
				} else {
					return recvErr
				}
			}

			entries = append(entries, resp.Entry)

		}

		return nil
	})

	return

}

func (s3a *S3ApiServer) rm(parentDirectoryPath, entryName string, isDeleteData, isRecursive bool) error {

	return s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {

		err := doDeleteEntry(client, parentDirectoryPath, entryName, isDeleteData, isRecursive)
		if err != nil {
			return err
		}

		return nil
	})

}

func doDeleteEntry(client filer_pb.SeaweedFilerClient, parentDirectoryPath string, entryName string, isDeleteData bool, isRecursive bool) error {
	request := &filer_pb.DeleteEntryRequest{
		Directory:    parentDirectoryPath,
		Name:         entryName,
		IsDeleteData: isDeleteData,
		IsRecursive:  isRecursive,
	}

	glog.V(1).Infof("delete entry %v/%v: %v", parentDirectoryPath, entryName, request)
	if resp, err := client.DeleteEntry(context.Background(), request); err != nil {
		glog.V(0).Infof("delete entry %v: %v", request, err)
		return fmt.Errorf("delete entry %s/%s: %v", parentDirectoryPath, entryName, err)
	} else {
		if resp.Error != "" {
			return fmt.Errorf("delete entry %s/%s: %v", parentDirectoryPath, entryName, resp.Error)
		}
	}
	return nil
}

func (s3a *S3ApiServer) exists(parentDirectoryPath string, entryName string, isDirectory bool) (exists bool, err error) {

	err = s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {

		request := &filer_pb.LookupDirectoryEntryRequest{
			Directory: parentDirectoryPath,
			Name:      entryName,
		}

		glog.V(4).Infof("exists entry %v/%v: %v", parentDirectoryPath, entryName, request)
		resp, err := filer_pb.LookupEntry(client, request)
		if err != nil {
			if err == filer_pb.ErrNotFound {
				exists = false
				return nil
			}
			glog.V(0).Infof("exists entry %v: %v", request, err)
			return fmt.Errorf("exists entry %s/%s: %v", parentDirectoryPath, entryName, err)
		}

		exists = resp.Entry.IsDirectory == isDirectory

		return nil
	})

	return
}

func objectKey(key *string) *string {
	if strings.HasPrefix(*key, "/") {
		t := (*key)[1:]
		return &t
	}
	return key
}