cloud storage providers: remove head bucket requests

let's just assume the bucket exists on "stat" requests for the "/" path

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

go.mod

@@ -70,7 +70,7 @@ require (
 	golang.org/x/oauth2 v0.0.0-20220808172628-8227340efae7
 	golang.org/x/sys v0.0.0-20220808155132-1c4a2a72c664
 	golang.org/x/time v0.0.0-20220722155302-e5dcc9cfc0b9
-	google.golang.org/api v0.91.0
+	google.golang.org/api v0.92.0
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0
 )
 

go.sum

@@ -1118,8 +1118,8 @@ google.golang.org/api v0.80.0/go.mod h1:xY3nI94gbvBrE0J6NHXhxOmW97HG7Khjkku6AFB3
 google.golang.org/api v0.84.0/go.mod h1:NTsGnUFJMYROtiquksZHBWtHfeMC7iYthki7Eq3pa8o=
 google.golang.org/api v0.85.0/go.mod h1:AqZf8Ep9uZ2pyTvgL+x0D3Zt0eoT9b5E8fmzfu6FO2g=
 google.golang.org/api v0.86.0/go.mod h1:+Sem1dnrKlrXMR/X0bPnMWyluQe4RsNoYfmNLhOIkzw=
-google.golang.org/api v0.91.0 h1:731+JzuwaJoZXRQGmPoBiV+SrsAfUaIkdMCWTcQNPyA=
+google.golang.org/api v0.92.0 h1:8JHk7q/+rJla+iRsWj9FQ9/wjv2M1SKtpKSdmLhxPT0=
-google.golang.org/api v0.91.0/go.mod h1:+Sem1dnrKlrXMR/X0bPnMWyluQe4RsNoYfmNLhOIkzw=
+google.golang.org/api v0.92.0/go.mod h1:+Sem1dnrKlrXMR/X0bPnMWyluQe4RsNoYfmNLhOIkzw=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=

internal/metric/metric.go

@@ -399,18 +399,6 @@ var (
 		Help: "The total number of S3 head object errors",
 	})
 
-	// totalS3HeadBucket is the metric that reports the total successful S3 head bucket requests
-	totalS3HeadBucket = promauto.NewCounter(prometheus.CounterOpts{
-		Name: "sftpgo_s3_head_bucket",
-		Help: "The total number of successful S3 head bucket requests",
-	})
-
-	// totalS3HeadBucketErrors is the metric that reports the total S3 head bucket errors
-	totalS3HeadBucketErrors = promauto.NewCounter(prometheus.CounterOpts{
-		Name: "sftpgo_s3_head_bucket_errors",
-		Help: "The total number of S3 head bucket errors",
-	})
-
 	// totalGCSUploads is the metric that reports the total number of successful GCS uploads
 	totalGCSUploads = promauto.NewCounter(prometheus.CounterOpts{
 		Name: "sftpgo_gcs_uploads_total",
@@ -495,18 +483,6 @@ var (
 		Help: "The total number of GCS head object errors",
 	})
 
-	// totalGCSHeadBucket is the metric that reports the total successful GCS head bucket requests
-	totalGCSHeadBucket = promauto.NewCounter(prometheus.CounterOpts{
-		Name: "sftpgo_gcs_head_bucket",
-		Help: "The total number of successful GCS head bucket requests",
-	})
-
-	// totalGCSHeadBucketErrors is the metric that reports the total GCS head bucket errors
-	totalGCSHeadBucketErrors = promauto.NewCounter(prometheus.CounterOpts{
-		Name: "sftpgo_gcs_head_bucket_errors",
-		Help: "The total number of GCS head bucket errors",
-	})
-
 	// totalAZUploads is the metric that reports the total number of successful Azure uploads
 	totalAZUploads = promauto.NewCounter(prometheus.CounterOpts{
 		Name: "sftpgo_az_uploads_total",
@@ -591,18 +567,6 @@ var (
 		Help: "The total number of Azure head object errors",
 	})
 
-	// totalAZHeadContainer is the metric that reports the total successful Azure head container requests
-	totalAZHeadContainer = promauto.NewCounter(prometheus.CounterOpts{
-		Name: "sftpgo_az_head_container",
-		Help: "The total number of successful Azure head container requests",
-	})
-
-	// totalAZHeadContainerErrors is the metric that reports the total Azure head container errors
-	totalAZHeadContainerErrors = promauto.NewCounter(prometheus.CounterOpts{
-		Name: "sftpgo_az_head_container_errors",
-		Help: "The total number of Azure head container errors",
-	})
-
 	// totalSFTPFsUploads is the metric that reports the total number of successful SFTPFs uploads
 	totalSFTPFsUploads = promauto.NewCounter(prometheus.CounterOpts{
 		Name: "sftpgo_sftpfs_uploads_total",
@@ -766,15 +730,6 @@ func S3HeadObjectCompleted(err error) {
 	}
 }
 
-// S3HeadBucketCompleted updates metrics after a S3 head bucket request terminates
-func S3HeadBucketCompleted(err error) {
-	if err == nil {
-		totalS3HeadBucket.Inc()
-	} else {
-		totalS3HeadBucketErrors.Inc()
-	}
-}
-
 // GCSTransferCompleted updates metrics after a GCS upload or a download
 func GCSTransferCompleted(bytes int64, transferKind int, err error) {
 	if transferKind == 0 {
@@ -832,15 +787,6 @@ func GCSHeadObjectCompleted(err error) {
 	}
 }
 
-// GCSHeadBucketCompleted updates metrics after a GCS head bucket request terminates
-func GCSHeadBucketCompleted(err error) {
-	if err == nil {
-		totalGCSHeadBucket.Inc()
-	} else {
-		totalGCSHeadBucketErrors.Inc()
-	}
-}
-
 // AZTransferCompleted updates metrics after a Azure upload or a download
 func AZTransferCompleted(bytes int64, transferKind int, err error) {
 	if transferKind == 0 {
@@ -898,15 +844,6 @@ func AZHeadObjectCompleted(err error) {
 	}
 }
 
-// AZHeadContainerCompleted updates metrics after a Azure head container request terminates
-func AZHeadContainerCompleted(err error) {
-	if err == nil {
-		totalAZHeadContainer.Inc()
-	} else {
-		totalAZHeadContainerErrors.Inc()
-	}
-}
-
 // sftpFsTransferCompleted updates metrics after an SFTPFs upload or a download
 func sftpFsTransferCompleted(bytesSent, bytesReceived int64, transferKind int, err error) {
 	if transferKind == 0 {

internal/vfs/azblobfs.go

@@ -58,7 +58,6 @@ type AzureBlobFs struct {
 	// if not empty this fs is mouted as virtual folder in the specified path
 	mountPath       string
 	config          *AzBlobFsConfig
-	hasContainerAccess bool
 	containerClient *azblob.ContainerClient
 	ctxTimeout      time.Duration
 	ctxLongTimeout  time.Duration
@@ -124,7 +123,6 @@ func NewAzBlobFs(connectionID, localTempDir, mountPath string, config AzBlobFsCo
 			}
 			fs.containerClient, err = svc.NewContainerClient(fs.config.Container)
 		}
-		fs.hasContainerAccess = false
 		return fs, err
 	}
 
@@ -142,7 +140,6 @@ func NewAzBlobFs(connectionID, localTempDir, mountPath string, config AzBlobFsCo
 	if err != nil {
 		return fs, fmt.Errorf("invalid credentials: %v", err)
 	}
-	fs.hasContainerAccess = true
 	fs.containerClient, err = svc.NewContainerClient(fs.config.Container)
 	return fs, err
 }
@@ -162,13 +159,7 @@ func (fs *AzureBlobFs) ConnectionID() string {
 
 // Stat returns a FileInfo describing the named file
 func (fs *AzureBlobFs) Stat(name string) (os.FileInfo, error) {
-	if name == "" || name == "." {
+	if name == "" || name == "/" || name == "." {
-		if fs.hasContainerAccess {
-			err := fs.checkIfBucketExists()
-			if err != nil {
-				return nil, err
-			}
-		}
 		return updateFileInfoModTime(fs.getStorageID(), name, NewFileInfo(name, true, 0, time.Now(), false))
 	}
 	if fs.config.KeyPrefix == name+"/" {
@@ -835,15 +826,6 @@ func (fs *AzureBlobFs) setConfigDefaults() {
 	}
 }
 
-func (fs *AzureBlobFs) checkIfBucketExists() error {
-	ctx, cancelFn := context.WithDeadline(context.Background(), time.Now().Add(fs.ctxTimeout))
-	defer cancelFn()
-
-	_, err := fs.containerClient.GetProperties(ctx, &azblob.ContainerGetPropertiesOptions{})
-	metric.AZHeadContainerCompleted(err)
-	return err
-}
-
 func (fs *AzureBlobFs) hasContents(name string) (bool, error) {
 	result := false
 	prefix := fs.getPrefix(name)

internal/vfs/gcsfs.go

@@ -114,11 +114,7 @@ func (fs *GCSFs) ConnectionID() string {
 
 // Stat returns a FileInfo describing the named file
 func (fs *GCSFs) Stat(name string) (os.FileInfo, error) {
-	if name == "" || name == "." {
+	if name == "" || name == "/" || name == "." {
-		err := fs.checkIfBucketExists()
-		if err != nil {
-			return nil, err
-		}
 		return updateFileInfoModTime(fs.getStorageID(), name, NewFileInfo(name, true, 0, time.Now(), false))
 	}
 	if fs.config.KeyPrefix == name+"/" {
@@ -762,16 +758,6 @@ func (fs *GCSFs) getObjectStat(name string) (string, os.FileInfo, error) {
 	return name + "/", info, err
 }
 
-func (fs *GCSFs) checkIfBucketExists() error {
-	ctx, cancelFn := context.WithDeadline(context.Background(), time.Now().Add(fs.ctxTimeout))
-	defer cancelFn()
-
-	bkt := fs.svc.Bucket(fs.config.Bucket)
-	_, err := bkt.Attrs(ctx)
-	metric.GCSHeadBucketCompleted(err)
-	return err
-}
-
 func (fs *GCSFs) hasContents(name string) (bool, error) {
 	result := false
 	prefix := fs.getPrefix(name)

internal/vfs/s3fs.go

@@ -151,14 +151,10 @@ func (fs *S3Fs) ConnectionID() string {
 func (fs *S3Fs) Stat(name string) (os.FileInfo, error) {
 	var result *FileInfo
 	if name == "" || 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
+		return updateFileInfoModTime(fs.getStorageID(), name, NewFileInfo(name, true, 0, time.Now(), false))
 	}
 	obj, err := fs.headObject(name)
 	if err == nil {
@@ -755,17 +751,6 @@ func (fs *S3Fs) resolve(name *string, prefix string) (string, bool) {
 	return result, isDir
 }
 
-func (fs *S3Fs) checkIfBucketExists() error {
-	ctx, cancelFn := context.WithDeadline(context.Background(), time.Now().Add(fs.ctxTimeout))
-	defer cancelFn()
-
-	_, err := fs.svc.HeadBucket(ctx, &s3.HeadBucketInput{
-		Bucket: aws.String(fs.config.Bucket),
-	})
-	metric.S3HeadBucketCompleted(err)
-	return err
-}
-
 func (fs *S3Fs) setConfigDefaults() {
 	if fs.config.UploadPartSize == 0 {
 		fs.config.UploadPartSize = manager.DefaultUploadPartSize