// Package googlecloudstorage provides an interface to Google Cloud Storage // +build go1.9 package googlecloudstorage /* Notes Can't set Updated but can set Metadata on object creation Patch needs full_control not just read_write FIXME Patch/Delete/Get isn't working with files with spaces in - giving 404 error - https://code.google.com/p/google-api-go-client/issues/detail?id=64 */ import ( "encoding/base64" "encoding/hex" "fmt" "io" "io/ioutil" "log" "net/http" "os" "path" "regexp" "strings" "sync" "time" "github.com/ncw/rclone/fs" "github.com/ncw/rclone/fs/config" "github.com/ncw/rclone/fs/config/configmap" "github.com/ncw/rclone/fs/config/configstruct" "github.com/ncw/rclone/fs/config/obscure" "github.com/ncw/rclone/fs/fserrors" "github.com/ncw/rclone/fs/fshttp" "github.com/ncw/rclone/fs/hash" "github.com/ncw/rclone/fs/walk" "github.com/ncw/rclone/lib/oauthutil" "github.com/ncw/rclone/lib/pacer" "github.com/pkg/errors" "golang.org/x/oauth2" "golang.org/x/oauth2/google" "google.golang.org/api/googleapi" storage "google.golang.org/api/storage/v1" ) const ( rcloneClientID = "202264815644.apps.googleusercontent.com" rcloneEncryptedClientSecret = "Uj7C9jGfb9gmeaV70Lh058cNkWvepr-Es9sBm0zdgil7JaOWF1VySw" timeFormatIn = time.RFC3339 timeFormatOut = "2006-01-02T15:04:05.000000000Z07:00" metaMtime = "mtime" // key to store mtime under in metadata listChunks = 1000 // chunk size to read directory listings minSleep = 10 * time.Millisecond ) var ( // Description of how to auth for this app storageConfig = &oauth2.Config{ Scopes: []string{storage.DevstorageFullControlScope}, Endpoint: google.Endpoint, ClientID: rcloneClientID, ClientSecret: obscure.MustReveal(rcloneEncryptedClientSecret), RedirectURL: oauthutil.TitleBarRedirectURL, } ) // Register with Fs func init() { fs.Register(&fs.RegInfo{ Name: "google cloud storage", Prefix: "gcs", Description: "Google Cloud Storage (this is not Google Drive)", NewFs: NewFs, Config: func(name string, m configmap.Mapper) { saFile, _ := m.Get("service_account_file") saCreds, _ := m.Get("service_account_credentials") if saFile != "" || saCreds != "" { return } err := oauthutil.Config("google cloud storage", name, m, storageConfig) if err != nil { log.Fatalf("Failed to configure token: %v", err) } }, Options: []fs.Option{{ Name: config.ConfigClientID, Help: "Google Application Client Id\nLeave blank normally.", }, { Name: config.ConfigClientSecret, Help: "Google Application Client Secret\nLeave blank normally.", }, { Name: "project_number", Help: "Project number.\nOptional - needed only for list/create/delete buckets - see your developer console.", }, { Name: "service_account_file", Help: "Service Account Credentials JSON file path\nLeave blank normally.\nNeeded only if you want use SA instead of interactive login.", }, { Name: "service_account_credentials", Help: "Service Account Credentials JSON blob\nLeave blank normally.\nNeeded only if you want use SA instead of interactive login.", Hide: fs.OptionHideBoth, }, { Name: "object_acl", Help: "Access Control List for new objects.", Examples: []fs.OptionExample{{ Value: "authenticatedRead", Help: "Object owner gets OWNER access, and all Authenticated Users get READER access.", }, { Value: "bucketOwnerFullControl", Help: "Object owner gets OWNER access, and project team owners get OWNER access.", }, { Value: "bucketOwnerRead", Help: "Object owner gets OWNER access, and project team owners get READER access.", }, { Value: "private", Help: "Object owner gets OWNER access [default if left blank].", }, { Value: "projectPrivate", Help: "Object owner gets OWNER access, and project team members get access according to their roles.", }, { Value: "publicRead", Help: "Object owner gets OWNER access, and all Users get READER access.", }}, }, { Name: "bucket_acl", Help: "Access Control List for new buckets.", Examples: []fs.OptionExample{{ Value: "authenticatedRead", Help: "Project team owners get OWNER access, and all Authenticated Users get READER access.", }, { Value: "private", Help: "Project team owners get OWNER access [default if left blank].", }, { Value: "projectPrivate", Help: "Project team members get access according to their roles.", }, { Value: "publicRead", Help: "Project team owners get OWNER access, and all Users get READER access.", }, { Value: "publicReadWrite", Help: "Project team owners get OWNER access, and all Users get WRITER access.", }}, }, { Name: "location", Help: "Location for the newly created buckets.", Examples: []fs.OptionExample{{ Value: "", Help: "Empty for default location (US).", }, { Value: "asia", Help: "Multi-regional location for Asia.", }, { Value: "eu", Help: "Multi-regional location for Europe.", }, { Value: "us", Help: "Multi-regional location for United States.", }, { Value: "asia-east1", Help: "Taiwan.", }, { Value: "asia-northeast1", Help: "Tokyo.", }, { Value: "asia-southeast1", Help: "Singapore.", }, { Value: "australia-southeast1", Help: "Sydney.", }, { Value: "europe-west1", Help: "Belgium.", }, { Value: "europe-west2", Help: "London.", }, { Value: "us-central1", Help: "Iowa.", }, { Value: "us-east1", Help: "South Carolina.", }, { Value: "us-east4", Help: "Northern Virginia.", }, { Value: "us-west1", Help: "Oregon.", }}, }, { Name: "storage_class", Help: "The storage class to use when storing objects in Google Cloud Storage.", Examples: []fs.OptionExample{{ Value: "", Help: "Default", }, { Value: "MULTI_REGIONAL", Help: "Multi-regional storage class", }, { Value: "REGIONAL", Help: "Regional storage class", }, { Value: "NEARLINE", Help: "Nearline storage class", }, { Value: "COLDLINE", Help: "Coldline storage class", }, { Value: "DURABLE_REDUCED_AVAILABILITY", Help: "Durable reduced availability storage class", }}, }}, }) } // Options defines the configuration for this backend type Options struct { ProjectNumber string `config:"project_number"` ServiceAccountFile string `config:"service_account_file"` ServiceAccountCredentials string `config:"service_account_credentials"` ObjectACL string `config:"object_acl"` BucketACL string `config:"bucket_acl"` Location string `config:"location"` StorageClass string `config:"storage_class"` } // Fs represents a remote storage server type Fs struct { name string // name of this remote root string // the path we are working on if any opt Options // parsed options features *fs.Features // optional features svc *storage.Service // the connection to the storage server client *http.Client // authorized client bucket string // the bucket we are working on bucketOKMu sync.Mutex // mutex to protect bucket OK bucketOK bool // true if we have created the bucket pacer *pacer.Pacer // To pace the API calls } // Object describes a storage object // // Will definitely have info but maybe not meta type Object struct { fs *Fs // what this object is part of remote string // The remote path url string // download path md5sum string // The MD5Sum of the object bytes int64 // Bytes in the object modTime time.Time // Modified time of the object mimeType string } // ------------------------------------------------------------ // Name of the remote (as passed into NewFs) func (f *Fs) Name() string { return f.name } // Root of the remote (as passed into NewFs) func (f *Fs) Root() string { if f.root == "" { return f.bucket } return f.bucket + "/" + f.root } // String converts this Fs to a string func (f *Fs) String() string { if f.root == "" { return fmt.Sprintf("Storage bucket %s", f.bucket) } return fmt.Sprintf("Storage bucket %s path %s", f.bucket, f.root) } // Features returns the optional features of this Fs func (f *Fs) Features() *fs.Features { return f.features } // shouldRetry determines whehter a given err rates being retried func shouldRetry(err error) (again bool, errOut error) { again = false if err != nil { if fserrors.ShouldRetry(err) { again = true } else { switch gerr := err.(type) { case *googleapi.Error: if gerr.Code >= 500 && gerr.Code < 600 { // All 5xx errors should be retried again = true } else if len(gerr.Errors) > 0 { reason := gerr.Errors[0].Reason if reason == "rateLimitExceeded" || reason == "userRateLimitExceeded" { again = true } } } } } return again, err } // Pattern to match a storage path var matcher = regexp.MustCompile(`^([^/]*)(.*)$`) // parseParse parses a storage 'url' func parsePath(path string) (bucket, directory string, err error) { parts := matcher.FindStringSubmatch(path) if parts == nil { err = errors.Errorf("couldn't find bucket in storage path %q", path) } else { bucket, directory = parts[1], parts[2] directory = strings.Trim(directory, "/") } return } func getServiceAccountClient(credentialsData []byte) (*http.Client, error) { conf, err := google.JWTConfigFromJSON(credentialsData, storageConfig.Scopes...) if err != nil { return nil, errors.Wrap(err, "error processing credentials") } ctxWithSpecialClient := oauthutil.Context(fshttp.NewClient(fs.Config)) return oauth2.NewClient(ctxWithSpecialClient, conf.TokenSource(ctxWithSpecialClient)), nil } // NewFs contstructs an Fs from the path, bucket:path func NewFs(name, root string, m configmap.Mapper) (fs.Fs, error) { var oAuthClient *http.Client // Parse config into Options struct opt := new(Options) err := configstruct.Set(m, opt) if err != nil { return nil, err } if opt.ObjectACL == "" { opt.ObjectACL = "private" } if opt.BucketACL == "" { opt.BucketACL = "private" } // try loading service account credentials from env variable, then from a file if opt.ServiceAccountCredentials == "" && opt.ServiceAccountFile != "" { loadedCreds, err := ioutil.ReadFile(os.ExpandEnv(opt.ServiceAccountFile)) if err != nil { return nil, errors.Wrap(err, "error opening service account credentials file") } opt.ServiceAccountCredentials = string(loadedCreds) } if opt.ServiceAccountCredentials != "" { oAuthClient, err = getServiceAccountClient([]byte(opt.ServiceAccountCredentials)) if err != nil { return nil, errors.Wrap(err, "failed configuring Google Cloud Storage Service Account") } } else { oAuthClient, _, err = oauthutil.NewClient(name, m, storageConfig) if err != nil { return nil, errors.Wrap(err, "failed to configure Google Cloud Storage") } } bucket, directory, err := parsePath(root) if err != nil { return nil, err } f := &Fs{ name: name, bucket: bucket, root: directory, opt: *opt, pacer: pacer.New().SetMinSleep(minSleep).SetPacer(pacer.GoogleDrivePacer), } f.features = (&fs.Features{ ReadMimeType: true, WriteMimeType: true, BucketBased: true, }).Fill(f) // Create a new authorized Drive client. f.client = oAuthClient f.svc, err = storage.New(f.client) if err != nil { return nil, errors.Wrap(err, "couldn't create Google Cloud Storage client") } if f.root != "" { f.root += "/" // Check to see if the object exists err = f.pacer.Call(func() (bool, error) { _, err = f.svc.Objects.Get(bucket, directory).Do() return shouldRetry(err) }) if err == nil { f.root = path.Dir(directory) if f.root == "." { f.root = "" } else { f.root += "/" } // return an error with an fs which points to the parent return f, fs.ErrorIsFile } } return f, nil } // Return an Object from a path // // If it can't be found it returns the error fs.ErrorObjectNotFound. func (f *Fs) newObjectWithInfo(remote string, info *storage.Object) (fs.Object, error) { o := &Object{ fs: f, remote: remote, } if info != nil { o.setMetaData(info) } else { err := o.readMetaData() // reads info and meta, returning an error if err != nil { return nil, err } } return o, nil } // NewObject finds the Object at remote. If it can't be found // it returns the error fs.ErrorObjectNotFound. func (f *Fs) NewObject(remote string) (fs.Object, error) { return f.newObjectWithInfo(remote, nil) } // listFn is called from list to handle an object. type listFn func(remote string, object *storage.Object, isDirectory bool) error // list the objects into the function supplied // // dir is the starting directory, "" for root // // Set recurse to read sub directories func (f *Fs) list(dir string, recurse bool, fn listFn) (err error) { root := f.root rootLength := len(root) if dir != "" { root += dir + "/" } list := f.svc.Objects.List(f.bucket).Prefix(root).MaxResults(listChunks) if !recurse { list = list.Delimiter("/") } for { var objects *storage.Objects err = f.pacer.Call(func() (bool, error) { objects, err = list.Do() return shouldRetry(err) }) if err != nil { if gErr, ok := err.(*googleapi.Error); ok { if gErr.Code == http.StatusNotFound { err = fs.ErrorDirNotFound } } return err } if !recurse { var object storage.Object for _, prefix := range objects.Prefixes { if !strings.HasSuffix(prefix, "/") { continue } err = fn(prefix[rootLength:len(prefix)-1], &object, true) if err != nil { return err } } } for _, object := range objects.Items { if !strings.HasPrefix(object.Name, root) { fs.Logf(f, "Odd name received %q", object.Name) continue } remote := object.Name[rootLength:] // is this a directory marker? if (strings.HasSuffix(remote, "/") || remote == "") && object.Size == 0 { if recurse && remote != "" { // add a directory in if --fast-list since will have no prefixes err = fn(remote[:len(remote)-1], object, true) if err != nil { return err } } continue // skip directory marker } err = fn(remote, object, false) if err != nil { return err } } if objects.NextPageToken == "" { break } list.PageToken(objects.NextPageToken) } return nil } // Convert a list item into a DirEntry func (f *Fs) itemToDirEntry(remote string, object *storage.Object, isDirectory bool) (fs.DirEntry, error) { if isDirectory { d := fs.NewDir(remote, time.Time{}).SetSize(int64(object.Size)) return d, nil } o, err := f.newObjectWithInfo(remote, object) if err != nil { return nil, err } return o, nil } // mark the bucket as being OK func (f *Fs) markBucketOK() { if f.bucket != "" { f.bucketOKMu.Lock() f.bucketOK = true f.bucketOKMu.Unlock() } } // listDir lists a single directory func (f *Fs) listDir(dir string) (entries fs.DirEntries, err error) { // List the objects err = f.list(dir, false, func(remote string, object *storage.Object, isDirectory bool) error { entry, err := f.itemToDirEntry(remote, object, isDirectory) if err != nil { return err } if entry != nil { entries = append(entries, entry) } return nil }) if err != nil { return nil, err } // bucket must be present if listing succeeded f.markBucketOK() return entries, err } // listBuckets lists the buckets func (f *Fs) listBuckets(dir string) (entries fs.DirEntries, err error) { if dir != "" { return nil, fs.ErrorListBucketRequired } if f.opt.ProjectNumber == "" { return nil, errors.New("can't list buckets without project number") } listBuckets := f.svc.Buckets.List(f.opt.ProjectNumber).MaxResults(listChunks) for { var buckets *storage.Buckets err = f.pacer.Call(func() (bool, error) { buckets, err = listBuckets.Do() return shouldRetry(err) }) if err != nil { return nil, err } for _, bucket := range buckets.Items { d := fs.NewDir(bucket.Name, time.Time{}) entries = append(entries, d) } if buckets.NextPageToken == "" { break } listBuckets.PageToken(buckets.NextPageToken) } return entries, nil } // List the objects and directories in dir into entries. The // entries can be returned in any order but should be for a // complete directory. // // dir should be "" to list the root, and should not have // trailing slashes. // // This should return ErrDirNotFound if the directory isn't // found. func (f *Fs) List(dir string) (entries fs.DirEntries, err error) { if f.bucket == "" { return f.listBuckets(dir) } return f.listDir(dir) } // ListR lists the objects and directories of the Fs starting // from dir recursively into out. // // dir should be "" to start from the root, and should not // have trailing slashes. // // This should return ErrDirNotFound if the directory isn't // found. // // It should call callback for each tranche of entries read. // These need not be returned in any particular order. If // callback returns an error then the listing will stop // immediately. // // Don't implement this unless you have a more efficient way // of listing recursively that doing a directory traversal. func (f *Fs) ListR(dir string, callback fs.ListRCallback) (err error) { if f.bucket == "" { return fs.ErrorListBucketRequired } list := walk.NewListRHelper(callback) err = f.list(dir, true, func(remote string, object *storage.Object, isDirectory bool) error { entry, err := f.itemToDirEntry(remote, object, isDirectory) if err != nil { return err } return list.Add(entry) }) if err != nil { return err } // bucket must be present if listing succeeded f.markBucketOK() return list.Flush() } // Put the object into the bucket // // Copy the reader in to the new object which is returned // // The new object may have been created if an error is returned func (f *Fs) Put(in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) (fs.Object, error) { // Temporary Object under construction o := &Object{ fs: f, remote: src.Remote(), } return o, o.Update(in, src, options...) } // PutStream uploads to the remote path with the modTime given of indeterminate size func (f *Fs) PutStream(in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) (fs.Object, error) { return f.Put(in, src, options...) } // Mkdir creates the bucket if it doesn't exist func (f *Fs) Mkdir(dir string) (err error) { f.bucketOKMu.Lock() defer f.bucketOKMu.Unlock() if f.bucketOK { return nil } // List something from the bucket to see if it exists. Doing it like this enables the use of a // service account that only has the "Storage Object Admin" role. See #2193 for details. err = f.pacer.Call(func() (bool, error) { _, err = f.svc.Objects.List(f.bucket).MaxResults(1).Do() return shouldRetry(err) }) if err == nil { // Bucket already exists f.bucketOK = true return nil } else if gErr, ok := err.(*googleapi.Error); ok { if gErr.Code != http.StatusNotFound { return errors.Wrap(err, "failed to get bucket") } } else { return errors.Wrap(err, "failed to get bucket") } if f.opt.ProjectNumber == "" { return errors.New("can't make bucket without project number") } bucket := storage.Bucket{ Name: f.bucket, Location: f.opt.Location, StorageClass: f.opt.StorageClass, } err = f.pacer.Call(func() (bool, error) { _, err = f.svc.Buckets.Insert(f.opt.ProjectNumber, &bucket).PredefinedAcl(f.opt.BucketACL).Do() return shouldRetry(err) }) if err == nil { f.bucketOK = true } return err } // Rmdir deletes the bucket if the fs is at the root // // Returns an error if it isn't empty: Error 409: The bucket you tried // to delete was not empty. func (f *Fs) Rmdir(dir string) (err error) { f.bucketOKMu.Lock() defer f.bucketOKMu.Unlock() if f.root != "" || dir != "" { return nil } err = f.pacer.Call(func() (bool, error) { err = f.svc.Buckets.Delete(f.bucket).Do() return shouldRetry(err) }) if err == nil { f.bucketOK = false } return err } // Precision returns the precision func (f *Fs) Precision() time.Duration { return time.Nanosecond } // Copy src to this remote using server side copy operations. // // This is stored with the remote path given // // It returns the destination Object and a possible error // // Will only be called if src.Fs().Name() == f.Name() // // If it isn't possible then return fs.ErrorCantCopy func (f *Fs) Copy(src fs.Object, remote string) (fs.Object, error) { err := f.Mkdir("") if err != nil { return nil, err } srcObj, ok := src.(*Object) if !ok { fs.Debugf(src, "Can't copy - not same remote type") return nil, fs.ErrorCantCopy } // Temporary Object under construction dstObj := &Object{ fs: f, remote: remote, } srcBucket := srcObj.fs.bucket srcObject := srcObj.fs.root + srcObj.remote dstBucket := f.bucket dstObject := f.root + remote var newObject *storage.Object err = f.pacer.Call(func() (bool, error) { newObject, err = f.svc.Objects.Copy(srcBucket, srcObject, dstBucket, dstObject, nil).Do() return shouldRetry(err) }) if err != nil { return nil, err } // Set the metadata for the new object while we have it dstObj.setMetaData(newObject) return dstObj, nil } // Hashes returns the supported hash sets. func (f *Fs) Hashes() hash.Set { return hash.Set(hash.MD5) } // ------------------------------------------------------------ // Fs returns the parent Fs func (o *Object) Fs() fs.Info { return o.fs } // Return a string version func (o *Object) String() string { if o == nil { return "" } return o.remote } // Remote returns the remote path func (o *Object) Remote() string { return o.remote } // Hash returns the Md5sum of an object returning a lowercase hex string func (o *Object) Hash(t hash.Type) (string, error) { if t != hash.MD5 { return "", hash.ErrUnsupported } return o.md5sum, nil } // Size returns the size of an object in bytes func (o *Object) Size() int64 { return o.bytes } // setMetaData sets the fs data from a storage.Object func (o *Object) setMetaData(info *storage.Object) { o.url = info.MediaLink o.bytes = int64(info.Size) o.mimeType = info.ContentType // Read md5sum md5sumData, err := base64.StdEncoding.DecodeString(info.Md5Hash) if err != nil { fs.Logf(o, "Bad MD5 decode: %v", err) } else { o.md5sum = hex.EncodeToString(md5sumData) } // read mtime out of metadata if available mtimeString, ok := info.Metadata[metaMtime] if ok { modTime, err := time.Parse(timeFormatIn, mtimeString) if err == nil { o.modTime = modTime return } fs.Debugf(o, "Failed to read mtime from metadata: %s", err) } // Fallback to the Updated time modTime, err := time.Parse(timeFormatIn, info.Updated) if err != nil { fs.Logf(o, "Bad time decode: %v", err) } else { o.modTime = modTime } } // readMetaData gets the metadata if it hasn't already been fetched // // it also sets the info func (o *Object) readMetaData() (err error) { if !o.modTime.IsZero() { return nil } var object *storage.Object err = o.fs.pacer.Call(func() (bool, error) { object, err = o.fs.svc.Objects.Get(o.fs.bucket, o.fs.root+o.remote).Do() return shouldRetry(err) }) if err != nil { if gErr, ok := err.(*googleapi.Error); ok { if gErr.Code == http.StatusNotFound { return fs.ErrorObjectNotFound } } return err } o.setMetaData(object) return nil } // ModTime returns the modification time of the object // // It attempts to read the objects mtime and if that isn't present the // LastModified returned in the http headers func (o *Object) ModTime() time.Time { err := o.readMetaData() if err != nil { // fs.Logf(o, "Failed to read metadata: %v", err) return time.Now() } return o.modTime } // Returns metadata for an object func metadataFromModTime(modTime time.Time) map[string]string { metadata := make(map[string]string, 1) metadata[metaMtime] = modTime.Format(timeFormatOut) return metadata } // SetModTime sets the modification time of the local fs object func (o *Object) SetModTime(modTime time.Time) (err error) { // This only adds metadata so will perserve other metadata object := storage.Object{ Bucket: o.fs.bucket, Name: o.fs.root + o.remote, Metadata: metadataFromModTime(modTime), } var newObject *storage.Object err = o.fs.pacer.Call(func() (bool, error) { newObject, err = o.fs.svc.Objects.Patch(o.fs.bucket, o.fs.root+o.remote, &object).Do() return shouldRetry(err) }) if err != nil { return err } o.setMetaData(newObject) return nil } // Storable returns a boolean as to whether this object is storable func (o *Object) Storable() bool { return true } // Open an object for read func (o *Object) Open(options ...fs.OpenOption) (in io.ReadCloser, err error) { req, err := http.NewRequest("GET", o.url, nil) if err != nil { return nil, err } fs.OpenOptionAddHTTPHeaders(req.Header, options) var res *http.Response err = o.fs.pacer.Call(func() (bool, error) { res, err = o.fs.client.Do(req) if err == nil { err = googleapi.CheckResponse(res) if err != nil { _ = res.Body.Close() // ignore error } } return shouldRetry(err) }) if err != nil { return nil, err } _, isRanging := req.Header["Range"] if !(res.StatusCode == http.StatusOK || (isRanging && res.StatusCode == http.StatusPartialContent)) { _ = res.Body.Close() // ignore error return nil, errors.Errorf("bad response: %d: %s", res.StatusCode, res.Status) } return res.Body, nil } // Update the object with the contents of the io.Reader, modTime and size // // The new object may have been created if an error is returned func (o *Object) Update(in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) error { err := o.fs.Mkdir("") if err != nil { return err } modTime := src.ModTime() object := storage.Object{ Bucket: o.fs.bucket, Name: o.fs.root + o.remote, ContentType: fs.MimeType(src), Updated: modTime.Format(timeFormatOut), // Doesn't get set Metadata: metadataFromModTime(modTime), } var newObject *storage.Object err = o.fs.pacer.CallNoRetry(func() (bool, error) { newObject, err = o.fs.svc.Objects.Insert(o.fs.bucket, &object).Media(in, googleapi.ContentType("")).Name(object.Name).PredefinedAcl(o.fs.opt.ObjectACL).Do() return shouldRetry(err) }) if err != nil { return err } // Set the metadata for the new object while we have it o.setMetaData(newObject) return nil } // Remove an object func (o *Object) Remove() (err error) { err = o.fs.pacer.Call(func() (bool, error) { err = o.fs.svc.Objects.Delete(o.fs.bucket, o.fs.root+o.remote).Do() return shouldRetry(err) }) return err } // MimeType of an Object if known, "" otherwise func (o *Object) MimeType() string { return o.mimeType } // Check the interfaces are satisfied var ( _ fs.Fs = &Fs{} _ fs.Copier = &Fs{} _ fs.PutStreamer = &Fs{} _ fs.ListRer = &Fs{} _ fs.Object = &Object{} _ fs.MimeTyper = &Object{} )