// Package googlecloudstorage provides an interface to Google Cloud Storage 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 ( "context" "encoding/base64" "encoding/hex" "errors" "fmt" "io" "io/ioutil" "net/http" "path" "strconv" "strings" "sync" "time" "github.com/rclone/rclone/fs" "github.com/rclone/rclone/fs/config" "github.com/rclone/rclone/fs/config/configmap" "github.com/rclone/rclone/fs/config/configstruct" "github.com/rclone/rclone/fs/config/obscure" "github.com/rclone/rclone/fs/fserrors" "github.com/rclone/rclone/fs/fshttp" "github.com/rclone/rclone/fs/hash" "github.com/rclone/rclone/fs/walk" "github.com/rclone/rclone/lib/bucket" "github.com/rclone/rclone/lib/encoder" "github.com/rclone/rclone/lib/env" "github.com/rclone/rclone/lib/oauthutil" "github.com/rclone/rclone/lib/pacer" "golang.org/x/oauth2" "golang.org/x/oauth2/google" "google.golang.org/api/googleapi" option "google.golang.org/api/option" // NOTE: This API is deprecated storage "google.golang.org/api/storage/v1" ) const ( rcloneClientID = "202264815644.apps.googleusercontent.com" rcloneEncryptedClientSecret = "Uj7C9jGfb9gmeaV70Lh058cNkWvepr-Es9sBm0zdgil7JaOWF1VySw" timeFormat = time.RFC3339Nano metaMtime = "mtime" // key to store mtime in metadata metaMtimeGsutil = "goog-reserved-file-mtime" // key used by GSUtil to store mtime 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.DevstorageReadWriteScope}, Endpoint: google.Endpoint, ClientID: rcloneClientID, ClientSecret: obscure.MustReveal(rcloneEncryptedClientSecret), RedirectURL: oauthutil.RedirectURL, } ) // 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(ctx context.Context, name string, m configmap.Mapper, config fs.ConfigIn) (*fs.ConfigOut, error) { saFile, _ := m.Get("service_account_file") saCreds, _ := m.Get("service_account_credentials") anonymous, _ := m.Get("anonymous") if saFile != "" || saCreds != "" || anonymous == "true" { return nil, nil } return oauthutil.ConfigOut("", &oauthutil.Options{ OAuth2Config: storageConfig, }) }, Options: append(oauthutil.SharedOptions, []fs.Option{{ Name: "project_number", Help: "Project number.\n\nOptional - needed only for list/create/delete buckets - see your developer console.", }, { Name: "service_account_file", Help: "Service Account Credentials JSON file path.\n\nLeave blank normally.\nNeeded only if you want use SA instead of interactive login." + env.ShellExpandHelp, }, { Name: "service_account_credentials", Help: "Service Account Credentials JSON blob.\n\nLeave blank normally.\nNeeded only if you want use SA instead of interactive login.", Hide: fs.OptionHideBoth, }, { Name: "anonymous", Help: "Access public buckets and objects without credentials.\n\nSet to 'true' if you just want to download files and don't configure credentials.", Default: false, }, { Name: "object_acl", Help: "Access Control List for new objects.", Examples: []fs.OptionExample{{ Value: "authenticatedRead", Help: "Object owner gets OWNER access.\nAll Authenticated Users get READER access.", }, { Value: "bucketOwnerFullControl", Help: "Object owner gets OWNER access.\nProject team owners get OWNER access.", }, { Value: "bucketOwnerRead", Help: "Object owner gets OWNER access.\nProject team owners get READER access.", }, { Value: "private", Help: "Object owner gets OWNER access.\nDefault if left blank.", }, { Value: "projectPrivate", Help: "Object owner gets OWNER access.\nProject team members get access according to their roles.", }, { Value: "publicRead", Help: "Object owner gets OWNER access.\nAll 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.\nAll Authenticated Users get READER access.", }, { Value: "private", Help: "Project team owners get OWNER access.\nDefault if left blank.", }, { Value: "projectPrivate", Help: "Project team members get access according to their roles.", }, { Value: "publicRead", Help: "Project team owners get OWNER access.\nAll Users get READER access.", }, { Value: "publicReadWrite", Help: "Project team owners get OWNER access.\nAll Users get WRITER access.", }}, }, { Name: "bucket_policy_only", Help: `Access checks should use bucket-level IAM policies. If you want to upload objects to a bucket with Bucket Policy Only set then you will need to set this. When it is set, rclone: - ignores ACLs set on buckets - ignores ACLs set on objects - creates buckets with Bucket Policy Only set Docs: https://cloud.google.com/storage/docs/bucket-policy-only `, Default: false, }, { 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-east2", Help: "Hong Kong", }, { Value: "asia-northeast1", Help: "Tokyo", }, { Value: "asia-northeast2", Help: "Osaka", }, { Value: "asia-northeast3", Help: "Seoul", }, { Value: "asia-south1", Help: "Mumbai", }, { Value: "asia-south2", Help: "Delhi", }, { Value: "asia-southeast1", Help: "Singapore", }, { Value: "asia-southeast2", Help: "Jakarta", }, { Value: "australia-southeast1", Help: "Sydney", }, { Value: "australia-southeast2", Help: "Melbourne", }, { Value: "europe-north1", Help: "Finland", }, { Value: "europe-west1", Help: "Belgium", }, { Value: "europe-west2", Help: "London", }, { Value: "europe-west3", Help: "Frankfurt", }, { Value: "europe-west4", Help: "Netherlands", }, { Value: "europe-west6", Help: "Zürich", }, { Value: "europe-central2", Help: "Warsaw", }, { Value: "us-central1", Help: "Iowa", }, { Value: "us-east1", Help: "South Carolina", }, { Value: "us-east4", Help: "Northern Virginia", }, { Value: "us-west1", Help: "Oregon", }, { Value: "us-west2", Help: "California", }, { Value: "us-west3", Help: "Salt Lake City", }, { Value: "us-west4", Help: "Las Vegas", }, { Value: "northamerica-northeast1", Help: "Montréal", }, { Value: "northamerica-northeast2", Help: "Toronto", }, { Value: "southamerica-east1", Help: "São Paulo", }, { Value: "southamerica-west1", Help: "Santiago", }, { Value: "asia1", Help: "Dual region: asia-northeast1 and asia-northeast2.", }, { Value: "eur4", Help: "Dual region: europe-north1 and europe-west4.", }, { Value: "nam4", Help: "Dual region: us-central1 and us-east1.", }}, }, { 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: "ARCHIVE", Help: "Archive storage class", }, { Value: "DURABLE_REDUCED_AVAILABILITY", Help: "Durable reduced availability storage class", }}, }, { Name: "no_check_bucket", Help: `If set, don't attempt to check the bucket exists or create it. This can be useful when trying to minimise the number of transactions rclone does if you know the bucket exists already. `, Default: false, Advanced: true, }, { Name: "decompress", Help: `If set this will decompress gzip encoded objects. It is possible to upload objects to GCS with "Content-Encoding: gzip" set. Normally rclone will download these files files as compressed objects. If this flag is set then rclone will decompress these files with "Content-Encoding: gzip" as they are received. This means that rclone can't check the size and hash but the file contents will be decompressed. `, Advanced: true, Default: false, }, { Name: config.ConfigEncoding, Help: config.ConfigEncodingHelp, Advanced: true, Default: (encoder.Base | encoder.EncodeCrLf | encoder.EncodeInvalidUtf8), }}...), }) } // 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"` Anonymous bool `config:"anonymous"` ObjectACL string `config:"object_acl"` BucketACL string `config:"bucket_acl"` BucketPolicyOnly bool `config:"bucket_policy_only"` Location string `config:"location"` StorageClass string `config:"storage_class"` NoCheckBucket bool `config:"no_check_bucket"` Decompress bool `config:"decompress"` Enc encoder.MultiEncoder `config:"encoding"` } // 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 rootBucket string // bucket part of root (if any) rootDirectory string // directory part of root (if any) cache *bucket.Cache // cache of bucket status pacer *fs.Pacer // To pace the API calls warnCompressed sync.Once // warn once about compressed files } // 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 gzipped bool // set if object has Content-Encoding: gzip } // ------------------------------------------------------------ // 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 { return f.root } // String converts this Fs to a string func (f *Fs) String() string { if f.rootBucket == "" { return "GCS root" } if f.rootDirectory == "" { return fmt.Sprintf("GCS bucket %s", f.rootBucket) } return fmt.Sprintf("GCS bucket %s path %s", f.rootBucket, f.rootDirectory) } // Features returns the optional features of this Fs func (f *Fs) Features() *fs.Features { return f.features } // shouldRetry determines whether a given err rates being retried func shouldRetry(ctx context.Context, err error) (again bool, errOut error) { if fserrors.ContextError(ctx, &err) { return false, err } 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 } // parsePath parses a remote 'url' func parsePath(path string) (root string) { root = strings.Trim(path, "/") return } // split returns bucket and bucketPath from the rootRelativePath // relative to f.root func (f *Fs) split(rootRelativePath string) (bucketName, bucketPath string) { bucketName, bucketPath = bucket.Split(path.Join(f.root, rootRelativePath)) return f.opt.Enc.FromStandardName(bucketName), f.opt.Enc.FromStandardPath(bucketPath) } // split returns bucket and bucketPath from the object func (o *Object) split() (bucket, bucketPath string) { return o.fs.split(o.remote) } func getServiceAccountClient(ctx context.Context, credentialsData []byte) (*http.Client, error) { conf, err := google.JWTConfigFromJSON(credentialsData, storageConfig.Scopes...) if err != nil { return nil, fmt.Errorf("error processing credentials: %w", err) } ctxWithSpecialClient := oauthutil.Context(ctx, fshttp.NewClient(ctx)) return oauth2.NewClient(ctxWithSpecialClient, conf.TokenSource(ctxWithSpecialClient)), nil } // setRoot changes the root of the Fs func (f *Fs) setRoot(root string) { f.root = parsePath(root) f.rootBucket, f.rootDirectory = bucket.Split(f.root) } // NewFs constructs an Fs from the path, bucket:path func NewFs(ctx context.Context, 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(env.ShellExpand(opt.ServiceAccountFile)) if err != nil { return nil, fmt.Errorf("error opening service account credentials file: %w", err) } opt.ServiceAccountCredentials = string(loadedCreds) } if opt.Anonymous { oAuthClient = fshttp.NewClient(ctx) } else if opt.ServiceAccountCredentials != "" { oAuthClient, err = getServiceAccountClient(ctx, []byte(opt.ServiceAccountCredentials)) if err != nil { return nil, fmt.Errorf("failed configuring Google Cloud Storage Service Account: %w", err) } } else { oAuthClient, _, err = oauthutil.NewClient(ctx, name, m, storageConfig) if err != nil { ctx := context.Background() oAuthClient, err = google.DefaultClient(ctx, storage.DevstorageFullControlScope) if err != nil { return nil, fmt.Errorf("failed to configure Google Cloud Storage: %w", err) } } } f := &Fs{ name: name, root: root, opt: *opt, pacer: fs.NewPacer(ctx, pacer.NewS3(pacer.MinSleep(minSleep))), cache: bucket.NewCache(), } f.setRoot(root) f.features = (&fs.Features{ ReadMimeType: true, WriteMimeType: true, BucketBased: true, BucketBasedRootOK: true, }).Fill(ctx, f) // Create a new authorized Drive client. f.client = oAuthClient f.svc, err = storage.NewService(context.Background(), option.WithHTTPClient(f.client)) if err != nil { return nil, fmt.Errorf("couldn't create Google Cloud Storage client: %w", err) } if f.rootBucket != "" && f.rootDirectory != "" { // Check to see if the object exists encodedDirectory := f.opt.Enc.FromStandardPath(f.rootDirectory) err = f.pacer.Call(func() (bool, error) { _, err = f.svc.Objects.Get(f.rootBucket, encodedDirectory).Context(ctx).Do() return shouldRetry(ctx, err) }) if err == nil { newRoot := path.Dir(f.root) if newRoot == "." { newRoot = "" } f.setRoot(newRoot) // 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(ctx context.Context, remote string, info *storage.Object) (fs.Object, error) { o := &Object{ fs: f, remote: remote, } if info != nil { o.setMetaData(info) } else { err := o.readMetaData(ctx) // 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(ctx context.Context, remote string) (fs.Object, error) { return f.newObjectWithInfo(ctx, 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. // // The remote has prefix removed from it and if addBucket is set // then it adds the bucket to the start. func (f *Fs) list(ctx context.Context, bucket, directory, prefix string, addBucket bool, recurse bool, fn listFn) (err error) { if prefix != "" { prefix += "/" } if directory != "" { directory += "/" } list := f.svc.Objects.List(bucket).Prefix(directory).MaxResults(listChunks) if !recurse { list = list.Delimiter("/") } for { var objects *storage.Objects err = f.pacer.Call(func() (bool, error) { objects, err = list.Context(ctx).Do() return shouldRetry(ctx, 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 _, remote := range objects.Prefixes { if !strings.HasSuffix(remote, "/") { continue } remote = f.opt.Enc.ToStandardPath(remote) if !strings.HasPrefix(remote, prefix) { fs.Logf(f, "Odd name received %q", remote) continue } remote = remote[len(prefix) : len(remote)-1] if addBucket { remote = path.Join(bucket, remote) } err = fn(remote, &object, true) if err != nil { return err } } } for _, object := range objects.Items { remote := f.opt.Enc.ToStandardPath(object.Name) if !strings.HasPrefix(remote, prefix) { fs.Logf(f, "Odd name received %q", object.Name) continue } remote = remote[len(prefix):] isDirectory := remote == "" || strings.HasSuffix(remote, "/") if addBucket { remote = path.Join(bucket, remote) } // is this a directory marker? if isDirectory { 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(ctx context.Context, 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(ctx, remote, object) if err != nil { return nil, err } return o, nil } // listDir lists a single directory func (f *Fs) listDir(ctx context.Context, bucket, directory, prefix string, addBucket bool) (entries fs.DirEntries, err error) { // List the objects err = f.list(ctx, bucket, directory, prefix, addBucket, false, func(remote string, object *storage.Object, isDirectory bool) error { entry, err := f.itemToDirEntry(ctx, 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.cache.MarkOK(bucket) return entries, err } // listBuckets lists the buckets func (f *Fs) listBuckets(ctx context.Context) (entries fs.DirEntries, err error) { 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.Context(ctx).Do() return shouldRetry(ctx, err) }) if err != nil { return nil, err } for _, bucket := range buckets.Items { d := fs.NewDir(f.opt.Enc.ToStandardName(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(ctx context.Context, dir string) (entries fs.DirEntries, err error) { bucket, directory := f.split(dir) if bucket == "" { if directory != "" { return nil, fs.ErrorListBucketRequired } return f.listBuckets(ctx) } return f.listDir(ctx, bucket, directory, f.rootDirectory, f.rootBucket == "") } // 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(ctx context.Context, dir string, callback fs.ListRCallback) (err error) { bucket, directory := f.split(dir) list := walk.NewListRHelper(callback) listR := func(bucket, directory, prefix string, addBucket bool) error { return f.list(ctx, bucket, directory, prefix, addBucket, true, func(remote string, object *storage.Object, isDirectory bool) error { entry, err := f.itemToDirEntry(ctx, remote, object, isDirectory) if err != nil { return err } return list.Add(entry) }) } if bucket == "" { entries, err := f.listBuckets(ctx) if err != nil { return err } for _, entry := range entries { err = list.Add(entry) if err != nil { return err } bucket := entry.Remote() err = listR(bucket, "", f.rootDirectory, true) if err != nil { return err } // bucket must be present if listing succeeded f.cache.MarkOK(bucket) } } else { err = listR(bucket, directory, f.rootDirectory, f.rootBucket == "") if err != nil { return err } // bucket must be present if listing succeeded f.cache.MarkOK(bucket) } 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(ctx context.Context, 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(ctx, in, src, options...) } // PutStream uploads to the remote path with the modTime given of indeterminate size func (f *Fs) PutStream(ctx context.Context, in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) (fs.Object, error) { return f.Put(ctx, in, src, options...) } // Mkdir creates the bucket if it doesn't exist func (f *Fs) Mkdir(ctx context.Context, dir string) (err error) { bucket, _ := f.split(dir) return f.makeBucket(ctx, bucket) } // makeBucket creates the bucket if it doesn't exist func (f *Fs) makeBucket(ctx context.Context, bucket string) (err error) { return f.cache.Create(bucket, func() error { // 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(bucket).MaxResults(1).Context(ctx).Do() return shouldRetry(ctx, err) }) if err == nil { // Bucket already exists return nil } else if gErr, ok := err.(*googleapi.Error); ok { if gErr.Code != http.StatusNotFound { return fmt.Errorf("failed to get bucket: %w", err) } } else { return fmt.Errorf("failed to get bucket: %w", err) } if f.opt.ProjectNumber == "" { return errors.New("can't make bucket without project number") } bucket := storage.Bucket{ Name: bucket, Location: f.opt.Location, StorageClass: f.opt.StorageClass, } if f.opt.BucketPolicyOnly { bucket.IamConfiguration = &storage.BucketIamConfiguration{ BucketPolicyOnly: &storage.BucketIamConfigurationBucketPolicyOnly{ Enabled: true, }, } } return f.pacer.Call(func() (bool, error) { insertBucket := f.svc.Buckets.Insert(f.opt.ProjectNumber, &bucket) if !f.opt.BucketPolicyOnly { insertBucket.PredefinedAcl(f.opt.BucketACL) } _, err = insertBucket.Context(ctx).Do() return shouldRetry(ctx, err) }) }, nil) } // checkBucket creates the bucket if it doesn't exist unless NoCheckBucket is true func (f *Fs) checkBucket(ctx context.Context, bucket string) error { if f.opt.NoCheckBucket { return nil } return f.makeBucket(ctx, bucket) } // 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(ctx context.Context, dir string) (err error) { bucket, directory := f.split(dir) if bucket == "" || directory != "" { return nil } return f.cache.Remove(bucket, func() error { return f.pacer.Call(func() (bool, error) { err = f.svc.Buckets.Delete(bucket).Context(ctx).Do() return shouldRetry(ctx, 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(ctx context.Context, src fs.Object, remote string) (fs.Object, error) { dstBucket, dstPath := f.split(remote) err := f.checkBucket(ctx, dstBucket) 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 } srcBucket, srcPath := srcObj.split() // Temporary Object under construction dstObj := &Object{ fs: f, remote: remote, } rewriteRequest := f.svc.Objects.Rewrite(srcBucket, srcPath, dstBucket, dstPath, nil) if !f.opt.BucketPolicyOnly { rewriteRequest.DestinationPredefinedAcl(f.opt.ObjectACL) } var rewriteResponse *storage.RewriteResponse for { err = f.pacer.Call(func() (bool, error) { rewriteResponse, err = rewriteRequest.Context(ctx).Do() return shouldRetry(ctx, err) }) if err != nil { return nil, err } if rewriteResponse.Done { break } rewriteRequest.RewriteToken(rewriteResponse.RewriteToken) fs.Debugf(dstObj, "Continuing rewrite %d bytes done", rewriteResponse.TotalBytesRewritten) } // Set the metadata for the new object while we have it dstObj.setMetaData(rewriteResponse.Resource) 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(ctx context.Context, 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 o.gzipped = info.ContentEncoding == "gzip" // 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(timeFormat, mtimeString) if err == nil { o.modTime = modTime return } fs.Debugf(o, "Failed to read mtime from metadata: %s", err) } // Fallback to GSUtil mtime mtimeGsutilString, ok := info.Metadata[metaMtimeGsutil] if ok { unixTimeSec, err := strconv.ParseInt(mtimeGsutilString, 10, 64) if err == nil { o.modTime = time.Unix(unixTimeSec, 0) return } fs.Debugf(o, "Failed to read GSUtil mtime from metadata: %s", err) } // Fallback to the Updated time modTime, err := time.Parse(timeFormat, info.Updated) if err != nil { fs.Logf(o, "Bad time decode: %v", err) } else { o.modTime = modTime } // If gunzipping then size and md5sum are unknown if o.gzipped && o.fs.opt.Decompress { o.bytes = -1 o.md5sum = "" } } // readObjectInfo reads the definition for an object func (o *Object) readObjectInfo(ctx context.Context) (object *storage.Object, err error) { bucket, bucketPath := o.split() err = o.fs.pacer.Call(func() (bool, error) { object, err = o.fs.svc.Objects.Get(bucket, bucketPath).Context(ctx).Do() return shouldRetry(ctx, err) }) if err != nil { if gErr, ok := err.(*googleapi.Error); ok { if gErr.Code == http.StatusNotFound { return nil, fs.ErrorObjectNotFound } } return nil, err } return object, nil } // readMetaData gets the metadata if it hasn't already been fetched // // it also sets the info func (o *Object) readMetaData(ctx context.Context) (err error) { if !o.modTime.IsZero() { return nil } object, err := o.readObjectInfo(ctx) if err != nil { 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(ctx context.Context) time.Time { err := o.readMetaData(ctx) 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(timeFormat) metadata[metaMtimeGsutil] = strconv.FormatInt(modTime.Unix(), 10) return metadata } // SetModTime sets the modification time of the local fs object func (o *Object) SetModTime(ctx context.Context, modTime time.Time) (err error) { // read the complete existing object first object, err := o.readObjectInfo(ctx) if err != nil { return err } // Add the mtime to the existing metadata if object.Metadata == nil { object.Metadata = make(map[string]string, 1) } object.Metadata[metaMtime] = modTime.Format(timeFormat) object.Metadata[metaMtimeGsutil] = strconv.FormatInt(modTime.Unix(), 10) // Copy the object to itself to update the metadata // Using PATCH requires too many permissions bucket, bucketPath := o.split() var newObject *storage.Object err = o.fs.pacer.Call(func() (bool, error) { copyObject := o.fs.svc.Objects.Copy(bucket, bucketPath, bucket, bucketPath, object) if !o.fs.opt.BucketPolicyOnly { copyObject.DestinationPredefinedAcl(o.fs.opt.ObjectACL) } newObject, err = copyObject.Context(ctx).Do() return shouldRetry(ctx, 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(ctx context.Context, options ...fs.OpenOption) (in io.ReadCloser, err error) { req, err := http.NewRequestWithContext(ctx, "GET", o.url, nil) if err != nil { return nil, err } fs.FixRangeOption(options, o.bytes) if o.gzipped && !o.fs.opt.Decompress { // Allow files which are stored on the cloud storage system // compressed to be downloaded without being decompressed. Note // that setting this here overrides the automatic decompression // in the Transport. // // See: https://cloud.google.com/storage/docs/transcoding req.Header.Set("Accept-Encoding", "gzip") o.fs.warnCompressed.Do(func() { fs.Logf(o, "Not decompressing 'Content-Encoding: gzip' compressed file. Use --gcs-decompress to override") }) } 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(ctx, 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, fmt.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(ctx context.Context, in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) error { bucket, bucketPath := o.split() err := o.fs.checkBucket(ctx, bucket) if err != nil { return err } modTime := src.ModTime(ctx) object := storage.Object{ Bucket: bucket, Name: bucketPath, ContentType: fs.MimeType(ctx, src), Metadata: metadataFromModTime(modTime), } // Apply upload options for _, option := range options { key, value := option.Header() lowerKey := strings.ToLower(key) switch lowerKey { case "": // ignore case "cache-control": object.CacheControl = value case "content-disposition": object.ContentDisposition = value case "content-encoding": object.ContentEncoding = value case "content-language": object.ContentLanguage = value case "content-type": object.ContentType = value case "x-goog-storage-class": object.StorageClass = value default: const googMetaPrefix = "x-goog-meta-" if strings.HasPrefix(lowerKey, googMetaPrefix) { metaKey := lowerKey[len(googMetaPrefix):] object.Metadata[metaKey] = value } else { fs.Errorf(o, "Don't know how to set key %q on upload", key) } } } var newObject *storage.Object err = o.fs.pacer.CallNoRetry(func() (bool, error) { insertObject := o.fs.svc.Objects.Insert(bucket, &object).Media(in, googleapi.ContentType("")).Name(object.Name) if !o.fs.opt.BucketPolicyOnly { insertObject.PredefinedAcl(o.fs.opt.ObjectACL) } newObject, err = insertObject.Context(ctx).Do() return shouldRetry(ctx, 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(ctx context.Context) (err error) { bucket, bucketPath := o.split() err = o.fs.pacer.Call(func() (bool, error) { err = o.fs.svc.Objects.Delete(bucket, bucketPath).Context(ctx).Do() return shouldRetry(ctx, err) }) return err } // MimeType of an Object if known, "" otherwise func (o *Object) MimeType(ctx context.Context) 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{} )