mirror of
https://github.com/drakkan/sftpgo.git
synced 2024-11-25 17:10:28 +00:00
815 lines
24 KiB
Go
815 lines
24 KiB
Go
//go:build !nos3
|
|
// +build !nos3
|
|
|
|
package vfs
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"mime"
|
|
"net/url"
|
|
"os"
|
|
"path"
|
|
"path/filepath"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/aws/aws-sdk-go/aws"
|
|
"github.com/aws/aws-sdk-go/aws/awserr"
|
|
"github.com/aws/aws-sdk-go/aws/credentials"
|
|
"github.com/aws/aws-sdk-go/aws/request"
|
|
"github.com/aws/aws-sdk-go/aws/session"
|
|
"github.com/aws/aws-sdk-go/service/s3"
|
|
"github.com/aws/aws-sdk-go/service/s3/s3manager"
|
|
"github.com/eikenb/pipeat"
|
|
"github.com/pkg/sftp"
|
|
|
|
"github.com/drakkan/sftpgo/v2/logger"
|
|
"github.com/drakkan/sftpgo/v2/metric"
|
|
"github.com/drakkan/sftpgo/v2/plugin"
|
|
"github.com/drakkan/sftpgo/v2/util"
|
|
"github.com/drakkan/sftpgo/v2/version"
|
|
)
|
|
|
|
// using this mime type for directories improves compatibility with s3fs-fuse
|
|
const s3DirMimeType = "application/x-directory"
|
|
|
|
// S3Fs is a Fs implementation for AWS S3 compatible object storages
|
|
type S3Fs struct {
|
|
connectionID string
|
|
localTempDir string
|
|
// if not empty this fs is mouted as virtual folder in the specified path
|
|
mountPath string
|
|
config *S3FsConfig
|
|
svc *s3.S3
|
|
ctxTimeout time.Duration
|
|
ctxLongTimeout time.Duration
|
|
}
|
|
|
|
func init() {
|
|
version.AddFeature("+s3")
|
|
}
|
|
|
|
// NewS3Fs returns an S3Fs object that allows to interact with an s3 compatible
|
|
// object storage
|
|
func NewS3Fs(connectionID, localTempDir, mountPath string, config S3FsConfig) (Fs, error) {
|
|
if localTempDir == "" {
|
|
if tempPath != "" {
|
|
localTempDir = tempPath
|
|
} else {
|
|
localTempDir = filepath.Clean(os.TempDir())
|
|
}
|
|
}
|
|
fs := &S3Fs{
|
|
connectionID: connectionID,
|
|
localTempDir: localTempDir,
|
|
mountPath: mountPath,
|
|
config: &config,
|
|
ctxTimeout: 30 * time.Second,
|
|
ctxLongTimeout: 300 * time.Second,
|
|
}
|
|
if err := fs.config.Validate(); err != nil {
|
|
return fs, err
|
|
}
|
|
awsConfig := aws.NewConfig()
|
|
|
|
if fs.config.Region != "" {
|
|
awsConfig.WithRegion(fs.config.Region)
|
|
}
|
|
|
|
if !fs.config.AccessSecret.IsEmpty() {
|
|
if err := fs.config.AccessSecret.TryDecrypt(); err != nil {
|
|
return fs, err
|
|
}
|
|
awsConfig.Credentials = credentials.NewStaticCredentials(fs.config.AccessKey, fs.config.AccessSecret.GetPayload(), "")
|
|
}
|
|
|
|
if fs.config.Endpoint != "" {
|
|
awsConfig.Endpoint = aws.String(fs.config.Endpoint)
|
|
}
|
|
if fs.config.ForcePathStyle {
|
|
awsConfig.S3ForcePathStyle = aws.Bool(true)
|
|
}
|
|
if fs.config.UploadPartSize == 0 {
|
|
fs.config.UploadPartSize = s3manager.DefaultUploadPartSize
|
|
} else {
|
|
fs.config.UploadPartSize *= 1024 * 1024
|
|
}
|
|
if fs.config.UploadConcurrency == 0 {
|
|
fs.config.UploadConcurrency = s3manager.DefaultUploadConcurrency
|
|
}
|
|
if fs.config.DownloadPartSize == 0 {
|
|
fs.config.DownloadPartSize = s3manager.DefaultDownloadPartSize
|
|
} else {
|
|
fs.config.DownloadPartSize *= 1024 * 1024
|
|
}
|
|
if fs.config.DownloadConcurrency == 0 {
|
|
fs.config.DownloadConcurrency = s3manager.DefaultDownloadConcurrency
|
|
}
|
|
|
|
sessOpts := session.Options{
|
|
Config: *awsConfig,
|
|
SharedConfigState: session.SharedConfigEnable,
|
|
}
|
|
sess, err := session.NewSessionWithOptions(sessOpts)
|
|
if err != nil {
|
|
return fs, err
|
|
}
|
|
fs.svc = s3.New(sess)
|
|
return fs, nil
|
|
}
|
|
|
|
// Name returns the name for the Fs implementation
|
|
func (fs *S3Fs) Name() string {
|
|
return fmt.Sprintf("S3Fs bucket %#v", fs.config.Bucket)
|
|
}
|
|
|
|
// ConnectionID returns the connection ID associated to this Fs implementation
|
|
func (fs *S3Fs) ConnectionID() string {
|
|
return fs.connectionID
|
|
}
|
|
|
|
// Stat returns a FileInfo describing the named file
|
|
func (fs *S3Fs) Stat(name string) (os.FileInfo, error) {
|
|
var result *FileInfo
|
|
if name == "/" || name == "." {
|
|
err := fs.checkIfBucketExists()
|
|
if err != nil {
|
|
return result, err
|
|
}
|
|
return updateFileInfoModTime(fs.getStorageID(), name, NewFileInfo(name, true, 0, time.Now(), false))
|
|
}
|
|
if "/"+fs.config.KeyPrefix == name+"/" {
|
|
return NewFileInfo(name, true, 0, time.Now(), false), nil
|
|
}
|
|
obj, err := fs.headObject(name)
|
|
if err == nil {
|
|
// a "dir" has a trailing "/" so we cannot have a directory here
|
|
objSize := *obj.ContentLength
|
|
objectModTime := *obj.LastModified
|
|
return updateFileInfoModTime(fs.getStorageID(), name, NewFileInfo(name, false, objSize, objectModTime, false))
|
|
}
|
|
if !fs.IsNotExist(err) {
|
|
return result, err
|
|
}
|
|
// now check if this is a prefix (virtual directory)
|
|
hasContents, err := fs.hasContents(name)
|
|
if err == nil && hasContents {
|
|
return updateFileInfoModTime(fs.getStorageID(), name, NewFileInfo(name, true, 0, time.Now(), false))
|
|
} else if err != nil {
|
|
return nil, err
|
|
}
|
|
// the requested file may still be a directory as a zero bytes key
|
|
// with a trailing forward slash (created using mkdir).
|
|
// S3 doesn't return content type when listing objects, so we have
|
|
// create "dirs" adding a trailing "/" to the key
|
|
return fs.getStatForDir(name)
|
|
}
|
|
|
|
func (fs *S3Fs) getStatForDir(name string) (os.FileInfo, error) {
|
|
var result *FileInfo
|
|
obj, err := fs.headObject(name + "/")
|
|
if err != nil {
|
|
return result, err
|
|
}
|
|
objSize := *obj.ContentLength
|
|
objectModTime := *obj.LastModified
|
|
return updateFileInfoModTime(fs.getStorageID(), name, NewFileInfo(name, true, objSize, objectModTime, false))
|
|
}
|
|
|
|
// Lstat returns a FileInfo describing the named file
|
|
func (fs *S3Fs) Lstat(name string) (os.FileInfo, error) {
|
|
return fs.Stat(name)
|
|
}
|
|
|
|
// Open opens the named file for reading
|
|
func (fs *S3Fs) Open(name string, offset int64) (File, *pipeat.PipeReaderAt, func(), error) {
|
|
r, w, err := pipeat.PipeInDir(fs.localTempDir)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
ctx, cancelFn := context.WithCancel(context.Background())
|
|
downloader := s3manager.NewDownloaderWithClient(fs.svc)
|
|
if offset == 0 && fs.config.DownloadPartMaxTime > 0 {
|
|
downloader.RequestOptions = append(downloader.RequestOptions, func(r *request.Request) {
|
|
chunkCtx, cancel := context.WithTimeout(r.Context(), time.Duration(fs.config.DownloadPartMaxTime)*time.Second)
|
|
r.SetContext(chunkCtx)
|
|
|
|
go func() {
|
|
<-ctx.Done()
|
|
cancel()
|
|
}()
|
|
})
|
|
}
|
|
var streamRange *string
|
|
if offset > 0 {
|
|
streamRange = aws.String(fmt.Sprintf("bytes=%v-", offset))
|
|
}
|
|
|
|
go func() {
|
|
defer cancelFn()
|
|
n, err := downloader.DownloadWithContext(ctx, w, &s3.GetObjectInput{
|
|
Bucket: aws.String(fs.config.Bucket),
|
|
Key: aws.String(name),
|
|
Range: streamRange,
|
|
}, func(d *s3manager.Downloader) {
|
|
d.Concurrency = fs.config.DownloadConcurrency
|
|
d.PartSize = fs.config.DownloadPartSize
|
|
})
|
|
w.CloseWithError(err) //nolint:errcheck
|
|
fsLog(fs, logger.LevelDebug, "download completed, path: %#v size: %v, err: %v", name, n, err)
|
|
metric.S3TransferCompleted(n, 1, err)
|
|
}()
|
|
return nil, r, cancelFn, nil
|
|
}
|
|
|
|
// Create creates or opens the named file for writing
|
|
func (fs *S3Fs) Create(name string, flag int) (File, *PipeWriter, func(), error) {
|
|
r, w, err := pipeat.PipeInDir(fs.localTempDir)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
p := NewPipeWriter(w)
|
|
ctx, cancelFn := context.WithCancel(context.Background())
|
|
uploader := s3manager.NewUploaderWithClient(fs.svc)
|
|
go func() {
|
|
defer cancelFn()
|
|
key := name
|
|
var contentType string
|
|
if flag == -1 {
|
|
contentType = s3DirMimeType
|
|
} else {
|
|
contentType = mime.TypeByExtension(path.Ext(name))
|
|
}
|
|
response, err := uploader.UploadWithContext(ctx, &s3manager.UploadInput{
|
|
Bucket: aws.String(fs.config.Bucket),
|
|
Key: aws.String(key),
|
|
Body: r,
|
|
ACL: util.NilIfEmpty(fs.config.ACL),
|
|
StorageClass: util.NilIfEmpty(fs.config.StorageClass),
|
|
ContentType: util.NilIfEmpty(contentType),
|
|
}, func(u *s3manager.Uploader) {
|
|
u.Concurrency = fs.config.UploadConcurrency
|
|
u.PartSize = fs.config.UploadPartSize
|
|
})
|
|
r.CloseWithError(err) //nolint:errcheck
|
|
p.Done(err)
|
|
fsLog(fs, logger.LevelDebug, "upload completed, path: %#v, acl: %#v, response: %v, readed bytes: %v, err: %+v",
|
|
name, fs.config.ACL, response, r.GetReadedBytes(), err)
|
|
metric.S3TransferCompleted(r.GetReadedBytes(), 0, err)
|
|
}()
|
|
return nil, p, cancelFn, nil
|
|
}
|
|
|
|
// Rename renames (moves) source to target.
|
|
// We don't support renaming non empty directories since we should
|
|
// rename all the contents too and this could take long time: think
|
|
// about directories with thousands of files, for each file we should
|
|
// execute a CopyObject call.
|
|
// TODO: rename does not work for files bigger than 5GB, implement
|
|
// multipart copy or wait for this pull request to be merged:
|
|
//
|
|
// https://github.com/aws/aws-sdk-go/pull/2653
|
|
//
|
|
func (fs *S3Fs) Rename(source, target string) error {
|
|
if source == target {
|
|
return nil
|
|
}
|
|
fi, err := fs.Stat(source)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
copySource := fs.Join(fs.config.Bucket, source)
|
|
if fi.IsDir() {
|
|
hasContents, err := fs.hasContents(source)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if hasContents {
|
|
return fmt.Errorf("cannot rename non empty directory: %#v", source)
|
|
}
|
|
if !strings.HasSuffix(copySource, "/") {
|
|
copySource += "/"
|
|
}
|
|
if !strings.HasSuffix(target, "/") {
|
|
target += "/"
|
|
}
|
|
}
|
|
var contentType string
|
|
if fi.IsDir() {
|
|
contentType = s3DirMimeType
|
|
} else {
|
|
contentType = mime.TypeByExtension(path.Ext(source))
|
|
}
|
|
ctx, cancelFn := context.WithDeadline(context.Background(), time.Now().Add(fs.ctxTimeout))
|
|
defer cancelFn()
|
|
_, err = fs.svc.CopyObjectWithContext(ctx, &s3.CopyObjectInput{
|
|
Bucket: aws.String(fs.config.Bucket),
|
|
CopySource: aws.String(pathEscape(copySource)),
|
|
Key: aws.String(target),
|
|
StorageClass: util.NilIfEmpty(fs.config.StorageClass),
|
|
ACL: util.NilIfEmpty(fs.config.ACL),
|
|
ContentType: util.NilIfEmpty(contentType),
|
|
})
|
|
if err != nil {
|
|
metric.S3CopyObjectCompleted(err)
|
|
return err
|
|
}
|
|
err = fs.svc.WaitUntilObjectExistsWithContext(ctx, &s3.HeadObjectInput{
|
|
Bucket: aws.String(fs.config.Bucket),
|
|
Key: aws.String(target),
|
|
})
|
|
metric.S3CopyObjectCompleted(err)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if plugin.Handler.HasMetadater() {
|
|
if !fi.IsDir() {
|
|
err = plugin.Handler.SetModificationTime(fs.getStorageID(), ensureAbsPath(target),
|
|
util.GetTimeAsMsSinceEpoch(fi.ModTime()))
|
|
if err != nil {
|
|
fsLog(fs, logger.LevelWarn, "unable to preserve modification time after renaming %#v -> %#v: %v",
|
|
source, target, err)
|
|
}
|
|
}
|
|
}
|
|
return fs.Remove(source, fi.IsDir())
|
|
}
|
|
|
|
// Remove removes the named file or (empty) directory.
|
|
func (fs *S3Fs) Remove(name string, isDir bool) error {
|
|
if isDir {
|
|
hasContents, err := fs.hasContents(name)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if hasContents {
|
|
return fmt.Errorf("cannot remove non empty directory: %#v", name)
|
|
}
|
|
if !strings.HasSuffix(name, "/") {
|
|
name += "/"
|
|
}
|
|
}
|
|
ctx, cancelFn := context.WithDeadline(context.Background(), time.Now().Add(fs.ctxTimeout))
|
|
defer cancelFn()
|
|
_, err := fs.svc.DeleteObjectWithContext(ctx, &s3.DeleteObjectInput{
|
|
Bucket: aws.String(fs.config.Bucket),
|
|
Key: aws.String(name),
|
|
})
|
|
metric.S3DeleteObjectCompleted(err)
|
|
if plugin.Handler.HasMetadater() && err == nil && !isDir {
|
|
if errMetadata := plugin.Handler.RemoveMetadata(fs.getStorageID(), ensureAbsPath(name)); errMetadata != nil {
|
|
fsLog(fs, logger.LevelWarn, "unable to remove metadata for path %#v: %v", name, errMetadata)
|
|
}
|
|
}
|
|
return err
|
|
}
|
|
|
|
// Mkdir creates a new directory with the specified name and default permissions
|
|
func (fs *S3Fs) Mkdir(name string) error {
|
|
_, err := fs.Stat(name)
|
|
if !fs.IsNotExist(err) {
|
|
return err
|
|
}
|
|
if !strings.HasSuffix(name, "/") {
|
|
name += "/"
|
|
}
|
|
_, w, _, err := fs.Create(name, -1)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return w.Close()
|
|
}
|
|
|
|
// MkdirAll does nothing, we don't have folder
|
|
func (*S3Fs) MkdirAll(name string, uid int, gid int) error {
|
|
return nil
|
|
}
|
|
|
|
// Symlink creates source as a symbolic link to target.
|
|
func (*S3Fs) Symlink(source, target string) error {
|
|
return ErrVfsUnsupported
|
|
}
|
|
|
|
// Readlink returns the destination of the named symbolic link
|
|
func (*S3Fs) Readlink(name string) (string, error) {
|
|
return "", ErrVfsUnsupported
|
|
}
|
|
|
|
// Chown changes the numeric uid and gid of the named file.
|
|
func (*S3Fs) Chown(name string, uid int, gid int) error {
|
|
return ErrVfsUnsupported
|
|
}
|
|
|
|
// Chmod changes the mode of the named file to mode.
|
|
func (*S3Fs) Chmod(name string, mode os.FileMode) error {
|
|
return ErrVfsUnsupported
|
|
}
|
|
|
|
// Chtimes changes the access and modification times of the named file.
|
|
func (fs *S3Fs) Chtimes(name string, atime, mtime time.Time, isUploading bool) error {
|
|
if !plugin.Handler.HasMetadater() {
|
|
return ErrVfsUnsupported
|
|
}
|
|
if !isUploading {
|
|
info, err := fs.Stat(name)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if info.IsDir() {
|
|
return ErrVfsUnsupported
|
|
}
|
|
}
|
|
return plugin.Handler.SetModificationTime(fs.getStorageID(), ensureAbsPath(name),
|
|
util.GetTimeAsMsSinceEpoch(mtime))
|
|
}
|
|
|
|
// Truncate changes the size of the named file.
|
|
// Truncate by path is not supported, while truncating an opened
|
|
// file is handled inside base transfer
|
|
func (*S3Fs) Truncate(name string, size int64) error {
|
|
return ErrVfsUnsupported
|
|
}
|
|
|
|
// ReadDir reads the directory named by dirname and returns
|
|
// a list of directory entries.
|
|
func (fs *S3Fs) ReadDir(dirname string) ([]os.FileInfo, error) {
|
|
var result []os.FileInfo
|
|
// dirname must be already cleaned
|
|
prefix := ""
|
|
if dirname != "/" && dirname != "." {
|
|
prefix = strings.TrimPrefix(dirname, "/")
|
|
if !strings.HasSuffix(prefix, "/") {
|
|
prefix += "/"
|
|
}
|
|
}
|
|
|
|
modTimes, err := getFolderModTimes(fs.getStorageID(), dirname)
|
|
if err != nil {
|
|
return result, err
|
|
}
|
|
prefixes := make(map[string]bool)
|
|
|
|
ctx, cancelFn := context.WithDeadline(context.Background(), time.Now().Add(fs.ctxTimeout))
|
|
defer cancelFn()
|
|
err = fs.svc.ListObjectsV2PagesWithContext(ctx, &s3.ListObjectsV2Input{
|
|
Bucket: aws.String(fs.config.Bucket),
|
|
Prefix: aws.String(prefix),
|
|
Delimiter: aws.String("/"),
|
|
}, func(page *s3.ListObjectsV2Output, lastPage bool) bool {
|
|
for _, p := range page.CommonPrefixes {
|
|
// prefixes have a trailing slash
|
|
name, _ := fs.resolve(p.Prefix, prefix)
|
|
if name == "" {
|
|
continue
|
|
}
|
|
if _, ok := prefixes[name]; ok {
|
|
continue
|
|
}
|
|
result = append(result, NewFileInfo(name, true, 0, time.Now(), false))
|
|
prefixes[name] = true
|
|
}
|
|
for _, fileObject := range page.Contents {
|
|
objectSize := *fileObject.Size
|
|
objectModTime := *fileObject.LastModified
|
|
name, isDir := fs.resolve(fileObject.Key, prefix)
|
|
if name == "" {
|
|
continue
|
|
}
|
|
if isDir {
|
|
if _, ok := prefixes[name]; ok {
|
|
continue
|
|
}
|
|
prefixes[name] = true
|
|
}
|
|
if t, ok := modTimes[name]; ok {
|
|
objectModTime = util.GetTimeFromMsecSinceEpoch(t)
|
|
}
|
|
result = append(result, NewFileInfo(name, (isDir && objectSize == 0), objectSize, objectModTime, false))
|
|
}
|
|
return true
|
|
})
|
|
metric.S3ListObjectsCompleted(err)
|
|
return result, err
|
|
}
|
|
|
|
// IsUploadResumeSupported returns true if resuming uploads is supported.
|
|
// Resuming uploads is not supported on S3
|
|
func (*S3Fs) IsUploadResumeSupported() bool {
|
|
return false
|
|
}
|
|
|
|
// IsAtomicUploadSupported returns true if atomic upload is supported.
|
|
// S3 uploads are already atomic, we don't need to upload to a temporary
|
|
// file
|
|
func (*S3Fs) IsAtomicUploadSupported() bool {
|
|
return false
|
|
}
|
|
|
|
// IsNotExist returns a boolean indicating whether the error is known to
|
|
// report that a file or directory does not exist
|
|
func (*S3Fs) IsNotExist(err error) bool {
|
|
if err == nil {
|
|
return false
|
|
}
|
|
if aerr, ok := err.(awserr.Error); ok {
|
|
if aerr.Code() == s3.ErrCodeNoSuchKey {
|
|
return true
|
|
}
|
|
if aerr.Code() == s3.ErrCodeNoSuchBucket {
|
|
return true
|
|
}
|
|
}
|
|
if multierr, ok := err.(s3manager.MultiUploadFailure); ok {
|
|
if multierr.Code() == s3.ErrCodeNoSuchKey {
|
|
return true
|
|
}
|
|
if multierr.Code() == s3.ErrCodeNoSuchBucket {
|
|
return true
|
|
}
|
|
}
|
|
return strings.Contains(err.Error(), "404")
|
|
}
|
|
|
|
// IsPermission returns a boolean indicating whether the error is known to
|
|
// report that permission is denied.
|
|
func (*S3Fs) IsPermission(err error) bool {
|
|
if err == nil {
|
|
return false
|
|
}
|
|
return strings.Contains(err.Error(), "403")
|
|
}
|
|
|
|
// IsNotSupported returns true if the error indicate an unsupported operation
|
|
func (*S3Fs) IsNotSupported(err error) bool {
|
|
if err == nil {
|
|
return false
|
|
}
|
|
return err == ErrVfsUnsupported
|
|
}
|
|
|
|
// CheckRootPath creates the specified local root directory if it does not exists
|
|
func (fs *S3Fs) CheckRootPath(username string, uid int, gid int) bool {
|
|
// we need a local directory for temporary files
|
|
osFs := NewOsFs(fs.ConnectionID(), fs.localTempDir, "")
|
|
return osFs.CheckRootPath(username, uid, gid)
|
|
}
|
|
|
|
// ScanRootDirContents returns the number of files contained in the bucket,
|
|
// and their size
|
|
func (fs *S3Fs) ScanRootDirContents() (int, int64, error) {
|
|
numFiles := 0
|
|
size := int64(0)
|
|
ctx, cancelFn := context.WithDeadline(context.Background(), time.Now().Add(fs.ctxLongTimeout))
|
|
defer cancelFn()
|
|
err := fs.svc.ListObjectsV2PagesWithContext(ctx, &s3.ListObjectsV2Input{
|
|
Bucket: aws.String(fs.config.Bucket),
|
|
Prefix: aws.String(fs.config.KeyPrefix),
|
|
}, func(page *s3.ListObjectsV2Output, lastPage bool) bool {
|
|
for _, fileObject := range page.Contents {
|
|
isDir := strings.HasSuffix(*fileObject.Key, "/")
|
|
if isDir && *fileObject.Size == 0 {
|
|
continue
|
|
}
|
|
numFiles++
|
|
size += *fileObject.Size
|
|
}
|
|
return true
|
|
})
|
|
metric.S3ListObjectsCompleted(err)
|
|
return numFiles, size, err
|
|
}
|
|
|
|
func (fs *S3Fs) getFileNamesInPrefix(fsPrefix string) (map[string]bool, error) {
|
|
fileNames := make(map[string]bool)
|
|
prefix := ""
|
|
if fsPrefix != "/" {
|
|
prefix = strings.TrimPrefix(fsPrefix, "/")
|
|
}
|
|
ctx, cancelFn := context.WithDeadline(context.Background(), time.Now().Add(fs.ctxTimeout))
|
|
defer cancelFn()
|
|
|
|
err := fs.svc.ListObjectsV2PagesWithContext(ctx, &s3.ListObjectsV2Input{
|
|
Bucket: aws.String(fs.config.Bucket),
|
|
Prefix: aws.String(prefix),
|
|
Delimiter: aws.String("/"),
|
|
}, func(page *s3.ListObjectsV2Output, lastPage bool) bool {
|
|
for _, fileObject := range page.Contents {
|
|
name, isDir := fs.resolve(fileObject.Key, prefix)
|
|
if name != "" && !isDir {
|
|
fileNames[name] = true
|
|
}
|
|
}
|
|
return true
|
|
})
|
|
metric.S3ListObjectsCompleted(err)
|
|
if err != nil {
|
|
fsLog(fs, logger.LevelError, "unable to get content for prefix %#v: %v", prefix, err)
|
|
return nil, err
|
|
}
|
|
return fileNames, err
|
|
}
|
|
|
|
// CheckMetadata checks the metadata consistency
|
|
func (fs *S3Fs) CheckMetadata() error {
|
|
return fsMetadataCheck(fs, fs.getStorageID(), fs.config.KeyPrefix)
|
|
}
|
|
|
|
// GetDirSize returns the number of files and the size for a folder
|
|
// including any subfolders
|
|
func (*S3Fs) GetDirSize(dirname string) (int, int64, error) {
|
|
return 0, 0, ErrVfsUnsupported
|
|
}
|
|
|
|
// GetAtomicUploadPath returns the path to use for an atomic upload.
|
|
// S3 uploads are already atomic, we never call this method for S3
|
|
func (*S3Fs) GetAtomicUploadPath(name string) string {
|
|
return ""
|
|
}
|
|
|
|
// GetRelativePath returns the path for a file relative to the user's home dir.
|
|
// This is the path as seen by SFTPGo users
|
|
func (fs *S3Fs) GetRelativePath(name string) string {
|
|
rel := path.Clean(name)
|
|
if rel == "." {
|
|
rel = ""
|
|
}
|
|
if !path.IsAbs(rel) {
|
|
return "/" + rel
|
|
}
|
|
if fs.config.KeyPrefix != "" {
|
|
if !strings.HasPrefix(rel, "/"+fs.config.KeyPrefix) {
|
|
rel = "/"
|
|
}
|
|
rel = path.Clean("/" + strings.TrimPrefix(rel, "/"+fs.config.KeyPrefix))
|
|
}
|
|
if fs.mountPath != "" {
|
|
rel = path.Join(fs.mountPath, rel)
|
|
}
|
|
return rel
|
|
}
|
|
|
|
// Walk walks the file tree rooted at root, calling walkFn for each file or
|
|
// directory in the tree, including root. The result are unordered
|
|
func (fs *S3Fs) Walk(root string, walkFn filepath.WalkFunc) error {
|
|
prefix := ""
|
|
if root != "/" && root != "." {
|
|
prefix = strings.TrimPrefix(root, "/")
|
|
if !strings.HasSuffix(prefix, "/") {
|
|
prefix += "/"
|
|
}
|
|
}
|
|
ctx, cancelFn := context.WithDeadline(context.Background(), time.Now().Add(fs.ctxTimeout))
|
|
defer cancelFn()
|
|
err := fs.svc.ListObjectsV2PagesWithContext(ctx, &s3.ListObjectsV2Input{
|
|
Bucket: aws.String(fs.config.Bucket),
|
|
Prefix: aws.String(prefix),
|
|
}, func(page *s3.ListObjectsV2Output, lastPage bool) bool {
|
|
for _, fileObject := range page.Contents {
|
|
objectSize := *fileObject.Size
|
|
objectModTime := *fileObject.LastModified
|
|
isDir := strings.HasSuffix(*fileObject.Key, "/")
|
|
name := path.Clean(*fileObject.Key)
|
|
if name == "/" || name == "." {
|
|
continue
|
|
}
|
|
err := walkFn(fs.Join("/", *fileObject.Key), NewFileInfo(name, isDir, objectSize, objectModTime, false), nil)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
})
|
|
metric.S3ListObjectsCompleted(err)
|
|
walkFn(root, NewFileInfo(root, true, 0, time.Now(), false), err) //nolint:errcheck
|
|
|
|
return err
|
|
}
|
|
|
|
// Join joins any number of path elements into a single path
|
|
func (*S3Fs) Join(elem ...string) string {
|
|
return path.Join(elem...)
|
|
}
|
|
|
|
// HasVirtualFolders returns true if folders are emulated
|
|
func (*S3Fs) HasVirtualFolders() bool {
|
|
return true
|
|
}
|
|
|
|
// ResolvePath returns the matching filesystem path for the specified virtual path
|
|
func (fs *S3Fs) ResolvePath(virtualPath string) (string, error) {
|
|
if fs.mountPath != "" {
|
|
virtualPath = strings.TrimPrefix(virtualPath, fs.mountPath)
|
|
}
|
|
if !path.IsAbs(virtualPath) {
|
|
virtualPath = path.Clean("/" + virtualPath)
|
|
}
|
|
return fs.Join("/", fs.config.KeyPrefix, virtualPath), nil
|
|
}
|
|
|
|
func (fs *S3Fs) resolve(name *string, prefix string) (string, bool) {
|
|
result := strings.TrimPrefix(*name, prefix)
|
|
isDir := strings.HasSuffix(result, "/")
|
|
if isDir {
|
|
result = strings.TrimSuffix(result, "/")
|
|
}
|
|
if strings.Contains(result, "/") {
|
|
i := strings.Index(result, "/")
|
|
isDir = true
|
|
result = result[:i]
|
|
}
|
|
return result, isDir
|
|
}
|
|
|
|
func (fs *S3Fs) checkIfBucketExists() error {
|
|
ctx, cancelFn := context.WithDeadline(context.Background(), time.Now().Add(fs.ctxTimeout))
|
|
defer cancelFn()
|
|
_, err := fs.svc.HeadBucketWithContext(ctx, &s3.HeadBucketInput{
|
|
Bucket: aws.String(fs.config.Bucket),
|
|
})
|
|
metric.S3HeadBucketCompleted(err)
|
|
return err
|
|
}
|
|
|
|
func (fs *S3Fs) hasContents(name string) (bool, error) {
|
|
prefix := ""
|
|
if name != "/" && name != "." {
|
|
prefix = strings.TrimPrefix(name, "/")
|
|
if !strings.HasSuffix(prefix, "/") {
|
|
prefix += "/"
|
|
}
|
|
}
|
|
maxResults := int64(2)
|
|
ctx, cancelFn := context.WithDeadline(context.Background(), time.Now().Add(fs.ctxTimeout))
|
|
defer cancelFn()
|
|
results, err := fs.svc.ListObjectsV2WithContext(ctx, &s3.ListObjectsV2Input{
|
|
Bucket: aws.String(fs.config.Bucket),
|
|
Prefix: aws.String(prefix),
|
|
MaxKeys: &maxResults,
|
|
})
|
|
metric.S3ListObjectsCompleted(err)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
// MinIO returns no contents while S3 returns 1 object
|
|
// with the key equal to the prefix for empty directories
|
|
for _, obj := range results.Contents {
|
|
name, _ := fs.resolve(obj.Key, prefix)
|
|
if name == "" || name == "/" {
|
|
continue
|
|
}
|
|
return true, nil
|
|
}
|
|
return false, nil
|
|
}
|
|
|
|
func (fs *S3Fs) headObject(name string) (*s3.HeadObjectOutput, error) {
|
|
ctx, cancelFn := context.WithDeadline(context.Background(), time.Now().Add(fs.ctxTimeout))
|
|
defer cancelFn()
|
|
obj, err := fs.svc.HeadObjectWithContext(ctx, &s3.HeadObjectInput{
|
|
Bucket: aws.String(fs.config.Bucket),
|
|
Key: aws.String(name),
|
|
})
|
|
metric.S3HeadObjectCompleted(err)
|
|
return obj, err
|
|
}
|
|
|
|
// GetMimeType returns the content type
|
|
func (fs *S3Fs) GetMimeType(name string) (string, error) {
|
|
obj, err := fs.headObject(name)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return *obj.ContentType, err
|
|
}
|
|
|
|
// Close closes the fs
|
|
func (*S3Fs) Close() error {
|
|
return nil
|
|
}
|
|
|
|
// GetAvailableDiskSize return the available size for the specified path
|
|
func (*S3Fs) GetAvailableDiskSize(dirName string) (*sftp.StatVFS, error) {
|
|
return nil, ErrStorageSizeUnavailable
|
|
}
|
|
|
|
func (fs *S3Fs) getStorageID() string {
|
|
if fs.config.Endpoint != "" {
|
|
if !strings.HasSuffix(fs.config.Endpoint, "/") {
|
|
return fmt.Sprintf("s3://%v/%v", fs.config.Endpoint, fs.config.Bucket)
|
|
}
|
|
return fmt.Sprintf("s3://%v%v", fs.config.Endpoint, fs.config.Bucket)
|
|
}
|
|
return fmt.Sprintf("s3://%v", fs.config.Bucket)
|
|
}
|
|
|
|
// ideally we should simply use url.PathEscape:
|
|
//
|
|
// https://github.com/awsdocs/aws-doc-sdk-examples/blob/master/go/example_code/s3/s3_copy_object.go#L65
|
|
//
|
|
// but this cause issue with some vendors, see #483, the code below is copied from rclone
|
|
func pathEscape(in string) string {
|
|
var u url.URL
|
|
u.Path = in
|
|
return strings.ReplaceAll(u.String(), "+", "%2B")
|
|
}
|