/
googlecloudstorage.go
1453 lines (1357 loc) · 41.8 KB
/
googlecloudstorage.go
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// 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"
"net/http"
"os"
"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")
envAuth, _ := m.Get("env_auth")
if saFile != "" || saCreds != "" || anonymous == "true" || envAuth == "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.",
Sensitive: true,
}, {
Name: "user_project",
Help: "User project.\n\nOptional - needed only for requester pays.",
Sensitive: true,
}, {
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,
Sensitive: true,
}, {
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: "directory_markers",
Default: false,
Advanced: true,
Help: `Upload an empty object with a trailing slash when a new directory is created
Empty folders are unsupported for bucket based remotes, this option creates an empty
object ending with "/", to persist the folder.
`,
}, {
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 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: "endpoint",
Help: "Endpoint for the service.\n\nLeave blank normally.",
Advanced: true,
}, {
Name: config.ConfigEncoding,
Help: config.ConfigEncodingHelp,
Advanced: true,
Default: (encoder.Base |
encoder.EncodeCrLf |
encoder.EncodeInvalidUtf8),
}, {
Name: "env_auth",
Help: "Get GCP IAM credentials from runtime (environment variables or instance meta data if no env vars).\n\nOnly applies if service_account_file and service_account_credentials is blank.",
Default: false,
Examples: []fs.OptionExample{{
Value: "false",
Help: "Enter credentials in the next step.",
}, {
Value: "true",
Help: "Get GCP IAM credentials from the environment (env vars or IAM).",
}},
}}...),
})
}
// Options defines the configuration for this backend
type Options struct {
ProjectNumber string `config:"project_number"`
UserProject string `config:"user_project"`
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"`
Endpoint string `config:"endpoint"`
Enc encoder.MultiEncoder `config:"encoding"`
EnvAuth bool `config:"env_auth"`
DirectoryMarkers bool `config:"directory_markers"`
}
// 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(bucket.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 := os.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 if opt.EnvAuth {
oAuthClient, err = google.DefaultClient(ctx, storage.DevstorageFullControlScope)
if err != nil {
return nil, fmt.Errorf("failed to configure Google Cloud Storage: %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)
if opt.DirectoryMarkers {
f.features.CanHaveEmptyDirectories = true
}
// Create a new authorized Drive client.
f.client = oAuthClient
gcsOpts := []option.ClientOption{option.WithHTTPClient(f.client)}
if opt.Endpoint != "" {
gcsOpts = append(gcsOpts, option.WithEndpoint(opt.Endpoint))
}
f.svc, err = storage.NewService(context.Background(), gcsOpts...)
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) {
get := f.svc.Objects.Get(f.rootBucket, encodedDirectory).Context(ctx)
if f.opt.UserProject != "" {
get = get.UserProject(f.opt.UserProject)
}
_, err = get.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 f.opt.UserProject != "" {
list = list.UserProject(f.opt.UserProject)
}
if !recurse {
list = list.Delimiter("/")
}
foundItems := 0
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 {
foundItems += len(objects.Prefixes)
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
}
}
}
foundItems += len(objects.Items)
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
}
isDirectory := remote == "" || strings.HasSuffix(remote, "/")
// is this a directory marker?
if isDirectory {
// Don't insert the root directory
if remote == directory {
continue
}
// process directory markers as directories
remote = strings.TrimRight(remote, "/")
}
remote = remote[len(prefix):]
if addBucket {
remote = path.Join(bucket, remote)
}
err = fn(remote, object, isDirectory)
if err != nil {
return err
}
}
if objects.NextPageToken == "" {
break
}
list.PageToken(objects.NextPageToken)
}
if f.opt.DirectoryMarkers && foundItems == 0 && directory != "" {
// Determine whether the directory exists or not by whether it has a marker
_, err := f.readObjectInfo(ctx, bucket, directory)
if err != nil {
if err == fs.ErrorObjectNotFound {
return fs.ErrorDirNotFound
}
return err
}
}
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)
if f.opt.UserProject != "" {
listBuckets = listBuckets.UserProject(f.opt.UserProject)
}
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...)
}
// Create directory marker file and parents
func (f *Fs) createDirectoryMarker(ctx context.Context, bucket, dir string) error {
if !f.opt.DirectoryMarkers || bucket == "" {
return nil
}
// Object to be uploaded
o := &Object{
fs: f,
modTime: time.Now(),
}
for {
_, bucketPath := f.split(dir)
// Don't create the directory marker if it is the bucket or at the very root
if bucketPath == "" {
break
}
o.remote = dir + "/"
// Check to see if object already exists
_, err := o.readObjectInfo(ctx)
if err == nil {
return nil
}
// Upload it if not
fs.Debugf(o, "Creating directory marker")
content := io.Reader(strings.NewReader(""))
err = o.Update(ctx, content, o)
if err != nil {
return fmt.Errorf("creating directory marker failed: %w", err)
}
// Now check parent directory exists
dir = path.Dir(dir)
if dir == "/" || dir == "." {
break
}
}
return nil
}
// Mkdir creates the bucket if it doesn't exist
func (f *Fs) Mkdir(ctx context.Context, dir string) (err error) {
bucket, _ := f.split(dir)
e := f.checkBucket(ctx, bucket)
if e != nil {
return e
}
return f.createDirectoryMarker(ctx, bucket, dir)
}
// mkdirParent creates the parent bucket/directory if it doesn't exist
func (f *Fs) mkdirParent(ctx context.Context, remote string) error {
remote = strings.TrimRight(remote, "/")
dir := path.Dir(remote)
if dir == "/" || dir == "." {
dir = ""
}
return f.Mkdir(ctx, dir)
}
// 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) {
list := f.svc.Objects.List(bucket).MaxResults(1).Context(ctx)
if f.opt.UserProject != "" {
list = list.UserProject(f.opt.UserProject)
}
_, err = list.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) {