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rclone/backend/dropbox/dropbox.go

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// Package dropbox provides an interface to Dropbox object storage
package dropbox
// FIXME dropbox for business would be quite easy to add
/*
The Case folding of PathDisplay problem
From the docs:
path_display String. The cased path to be used for display purposes
only. In rare instances the casing will not correctly match the user's
filesystem, but this behavior will match the path provided in the Core
API v1, and at least the last path component will have the correct
casing. Changes to only the casing of paths won't be returned by
list_folder/continue. This field will be null if the file or folder is
not mounted. This field is optional.
We solve this by not implementing the ListR interface. The dropbox
remote will recurse directory by directory only using the last element
of path_display and all will be well.
*/
import (
"context"
"errors"
"fmt"
"io"
"path"
"regexp"
"strings"
"time"
"unicode/utf8"
"github.com/dropbox/dropbox-sdk-go-unofficial/v6/dropbox"
"github.com/dropbox/dropbox-sdk-go-unofficial/v6/dropbox/auth"
"github.com/dropbox/dropbox-sdk-go-unofficial/v6/dropbox/common"
"github.com/dropbox/dropbox-sdk-go-unofficial/v6/dropbox/files"
"github.com/dropbox/dropbox-sdk-go-unofficial/v6/dropbox/sharing"
"github.com/dropbox/dropbox-sdk-go-unofficial/v6/dropbox/team"
"github.com/dropbox/dropbox-sdk-go-unofficial/v6/dropbox/users"
"github.com/rclone/rclone/backend/dropbox/dbhash"
"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/hash"
"github.com/rclone/rclone/lib/encoder"
"github.com/rclone/rclone/lib/oauthutil"
"github.com/rclone/rclone/lib/pacer"
"github.com/rclone/rclone/lib/readers"
"golang.org/x/oauth2"
)
// Constants
const (
rcloneClientID = "5jcck7diasz0rqy"
rcloneEncryptedClientSecret = "fRS5vVLr2v6FbyXYnIgjwBuUAt0osq_QZTXAEcmZ7g"
minSleep = 10 * time.Millisecond
maxSleep = 2 * time.Second
decayConstant = 2 // bigger for slower decay, exponential
// Upload chunk size - setting too small makes uploads slow.
// Chunks are buffered into memory for retries.
//
// Speed vs chunk size uploading a 1 GiB file on 2017-11-22
//
// Chunk Size MiB, Speed MiB/s, % of max
// 1 1.364 11%
// 2 2.443 19%
// 4 4.288 33%
// 8 6.79 52%
// 16 8.916 69%
// 24 10.195 79%
// 32 10.427 81%
// 40 10.96 85%
// 48 11.828 91%
// 56 11.763 91%
// 64 12.047 93%
// 96 12.302 95%
// 128 12.945 100%
//
// Choose 48 MiB which is 91% of Maximum speed. rclone by
// default does 4 transfers so this should use 4*48 MiB = 192 MiB
// by default.
defaultChunkSize = 48 * fs.Mebi
maxChunkSize = 150 * fs.Mebi
// Max length of filename parts: https://help.dropbox.com/installs-integrations/sync-uploads/files-not-syncing
maxFileNameLength = 255
)
var (
// Description of how to auth for this app
dropboxConfig = &oauth2.Config{
Scopes: []string{
"files.metadata.write",
"files.content.write",
"files.content.read",
"sharing.write",
"account_info.read", // needed for About
// "file_requests.write",
// "members.read", // needed for impersonate - but causes app to need to be approved by Dropbox Team Admin during the flow
// "team_data.member"
},
// Endpoint: oauth2.Endpoint{
// AuthURL: "https://www.dropbox.com/1/oauth2/authorize",
// TokenURL: "https://api.dropboxapi.com/1/oauth2/token",
// },
Endpoint: dropbox.OAuthEndpoint(""),
ClientID: rcloneClientID,
ClientSecret: obscure.MustReveal(rcloneEncryptedClientSecret),
RedirectURL: oauthutil.RedirectLocalhostURL,
}
// A regexp matching path names for files Dropbox ignores
// See https://www.dropbox.com/en/help/145 - Ignored files
ignoredFiles = regexp.MustCompile(`(?i)(^|/)(desktop\.ini|thumbs\.db|\.ds_store|icon\r|\.dropbox|\.dropbox.attr)$`)
// DbHashType is the hash.Type for Dropbox
DbHashType hash.Type
// Errors
errNotSupportedInSharedMode = fserrors.NoRetryError(errors.New("not supported in shared files mode"))
)
// Gets an oauth config with the right scopes
func getOauthConfig(m configmap.Mapper) *oauth2.Config {
// If not impersonating, use standard scopes
if impersonate, _ := m.Get("impersonate"); impersonate == "" {
return dropboxConfig
}
// Make a copy of the config
config := *dropboxConfig
// Make a copy of the scopes with extra scopes requires appended
config.Scopes = append(config.Scopes, "members.read", "team_data.member")
return &config
}
// Register with Fs
func init() {
DbHashType = hash.RegisterHash("dropbox", "DropboxHash", 64, dbhash.New)
fs.Register(&fs.RegInfo{
Name: "dropbox",
Description: "Dropbox",
NewFs: NewFs,
Config: func(ctx context.Context, name string, m configmap.Mapper, config fs.ConfigIn) (*fs.ConfigOut, error) {
return oauthutil.ConfigOut("", &oauthutil.Options{
OAuth2Config: getOauthConfig(m),
NoOffline: true,
OAuth2Opts: []oauth2.AuthCodeOption{
oauth2.SetAuthURLParam("token_access_type", "offline"),
},
})
},
Options: append(oauthutil.SharedOptions, []fs.Option{{
Name: "chunk_size",
Help: fmt.Sprintf(`Upload chunk size (< %v).
Any files larger than this will be uploaded in chunks of this size.
Note that chunks are buffered in memory (one at a time) so rclone can
deal with retries. Setting this larger will increase the speed
slightly (at most 10%% for 128 MiB in tests) at the cost of using more
memory. It can be set smaller if you are tight on memory.`, maxChunkSize),
Default: defaultChunkSize,
Advanced: true,
}, {
Name: "impersonate",
Help: `Impersonate this user when using a business account.
Note that if you want to use impersonate, you should make sure this
flag is set when running "rclone config" as this will cause rclone to
request the "members.read" scope which it won't normally. This is
needed to lookup a members email address into the internal ID that
dropbox uses in the API.
Using the "members.read" scope will require a Dropbox Team Admin
to approve during the OAuth flow.
You will have to use your own App (setting your own client_id and
client_secret) to use this option as currently rclone's default set of
permissions doesn't include "members.read". This can be added once
v1.55 or later is in use everywhere.
`,
Default: "",
Advanced: true,
}, {
Name: "shared_files",
Help: `Instructs rclone to work on individual shared files.
In this mode rclone's features are extremely limited - only list (ls, lsl, etc.)
operations and read operations (e.g. downloading) are supported in this mode.
All other operations will be disabled.`,
Default: false,
Advanced: true,
}, {
Name: "shared_folders",
Help: `Instructs rclone to work on shared folders.
When this flag is used with no path only the List operation is supported and
all available shared folders will be listed. If you specify a path the first part
will be interpreted as the name of shared folder. Rclone will then try to mount this
shared to the root namespace. On success shared folder rclone proceeds normally.
The shared folder is now pretty much a normal folder and all normal operations
are supported.
Note that we don't unmount the shared folder afterwards so the
--dropbox-shared-folders can be omitted after the first use of a particular
shared folder.`,
Default: false,
Advanced: true,
}, {
Name: "batch_mode",
Help: `Upload file batching sync|async|off.
This sets the batch mode used by rclone.
For full info see [the main docs](https://rclone.org/dropbox/#batch-mode)
This has 3 possible values
- off - no batching
- sync - batch uploads and check completion (default)
- async - batch upload and don't check completion
Rclone will close any outstanding batches when it exits which may make
a delay on quit.
`,
Default: "sync",
Advanced: true,
}, {
Name: "batch_size",
Help: `Max number of files in upload batch.
This sets the batch size of files to upload. It has to be less than 1000.
By default this is 0 which means rclone which calculate the batch size
depending on the setting of batch_mode.
- batch_mode: async - default batch_size is 100
- batch_mode: sync - default batch_size is the same as --transfers
- batch_mode: off - not in use
Rclone will close any outstanding batches when it exits which may make
a delay on quit.
Setting this is a great idea if you are uploading lots of small files
as it will make them a lot quicker. You can use --transfers 32 to
maximise throughput.
`,
Default: 0,
Advanced: true,
}, {
Name: "batch_timeout",
Help: `Max time to allow an idle upload batch before uploading.
If an upload batch is idle for more than this long then it will be
uploaded.
The default for this is 0 which means rclone will choose a sensible
default based on the batch_mode in use.
- batch_mode: async - default batch_timeout is 500ms
- batch_mode: sync - default batch_timeout is 10s
- batch_mode: off - not in use
`,
Default: fs.Duration(0),
Advanced: true,
}, {
Name: "batch_commit_timeout",
Help: `Max time to wait for a batch to finish committing`,
Default: fs.Duration(10 * time.Minute),
Advanced: true,
}, {
Name: config.ConfigEncoding,
Help: config.ConfigEncodingHelp,
Advanced: true,
// https://www.dropbox.com/help/syncing-uploads/files-not-syncing lists / and \
// as invalid characters.
// Testing revealed names with trailing spaces and the DEL character don't work.
// Also encode invalid UTF-8 bytes as json doesn't handle them properly.
Default: encoder.Base |
encoder.EncodeBackSlash |
encoder.EncodeDel |
encoder.EncodeRightSpace |
encoder.EncodeInvalidUtf8,
}}...),
})
}
// Options defines the configuration for this backend
type Options struct {
ChunkSize fs.SizeSuffix `config:"chunk_size"`
Impersonate string `config:"impersonate"`
SharedFiles bool `config:"shared_files"`
SharedFolders bool `config:"shared_folders"`
BatchMode string `config:"batch_mode"`
BatchSize int `config:"batch_size"`
BatchTimeout fs.Duration `config:"batch_timeout"`
BatchCommitTimeout fs.Duration `config:"batch_commit_timeout"`
AsyncBatch bool `config:"async_batch"`
Enc encoder.MultiEncoder `config:"encoding"`
}
// Fs represents a remote dropbox server
type Fs struct {
name string // name of this remote
root string // the path we are working on
opt Options // parsed options
ci *fs.ConfigInfo // global config
features *fs.Features // optional features
srv files.Client // the connection to the dropbox server
svc files.Client // the connection to the dropbox server (unauthorized)
sharing sharing.Client // as above, but for generating sharing links
users users.Client // as above, but for accessing user information
team team.Client // for the Teams API
slashRoot string // root with "/" prefix, lowercase
slashRootSlash string // root with "/" prefix and postfix, lowercase
pacer *fs.Pacer // To pace the API calls
ns string // The namespace we are using or "" for none
batcher *batcher // batch builder
}
// Object describes a dropbox object
//
// Dropbox Objects always have full metadata
type Object struct {
fs *Fs // what this object is part of
id string
url string
remote string // The remote path
bytes int64 // size of the object
modTime time.Time // time it was last modified
hash string // content_hash of the object
}
// 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 {
return fmt.Sprintf("Dropbox root '%s'", f.root)
}
// Features returns the optional features of this Fs
func (f *Fs) Features() *fs.Features {
return f.features
}
// shouldRetry returns a boolean as to whether this err deserves to be
// retried. It returns the err as a convenience
func shouldRetry(ctx context.Context, err error) (bool, error) {
if fserrors.ContextError(ctx, &err) {
return false, err
}
if err == nil {
return false, err
}
errString := err.Error()
// First check for specific errors
if strings.Contains(errString, "insufficient_space") {
return false, fserrors.FatalError(err)
} else if strings.Contains(errString, "malformed_path") {
return false, fserrors.NoRetryError(err)
}
// Then handle any official Retry-After header from Dropbox's SDK
switch e := err.(type) {
case auth.RateLimitAPIError:
if e.RateLimitError.RetryAfter > 0 {
fs.Logf(errString, "Too many requests or write operations. Trying again in %d seconds.", e.RateLimitError.RetryAfter)
err = pacer.RetryAfterError(err, time.Duration(e.RateLimitError.RetryAfter)*time.Second)
}
return true, err
}
// Keep old behavior for backward compatibility
if strings.Contains(errString, "too_many_write_operations") || strings.Contains(errString, "too_many_requests") || errString == "" {
return true, err
}
return fserrors.ShouldRetry(err), err
}
func checkUploadChunkSize(cs fs.SizeSuffix) error {
const minChunkSize = fs.SizeSuffixBase
if cs < minChunkSize {
return fmt.Errorf("%s is less than %s", cs, minChunkSize)
}
if cs > maxChunkSize {
return fmt.Errorf("%s is greater than %s", cs, maxChunkSize)
}
return nil
}
func (f *Fs) setUploadChunkSize(cs fs.SizeSuffix) (old fs.SizeSuffix, err error) {
err = checkUploadChunkSize(cs)
if err == nil {
old, f.opt.ChunkSize = f.opt.ChunkSize, cs
}
return
}
// NewFs constructs an Fs from the path, container:path
func NewFs(ctx context.Context, name, root string, m configmap.Mapper) (fs.Fs, error) {
// Parse config into Options struct
opt := new(Options)
err := configstruct.Set(m, opt)
if err != nil {
return nil, err
}
err = checkUploadChunkSize(opt.ChunkSize)
if err != nil {
return nil, fmt.Errorf("dropbox: chunk size: %w", err)
}
// Convert the old token if it exists. The old token was just
// just a string, the new one is a JSON blob
oldToken, ok := m.Get(config.ConfigToken)
oldToken = strings.TrimSpace(oldToken)
if ok && oldToken != "" && oldToken[0] != '{' {
fs.Infof(name, "Converting token to new format")
newToken := fmt.Sprintf(`{"access_token":"%s","token_type":"bearer","expiry":"0001-01-01T00:00:00Z"}`, oldToken)
err := config.SetValueAndSave(name, config.ConfigToken, newToken)
if err != nil {
return nil, fmt.Errorf("NewFS convert token: %w", err)
}
}
oAuthClient, _, err := oauthutil.NewClient(ctx, name, m, getOauthConfig(m))
if err != nil {
return nil, fmt.Errorf("failed to configure dropbox: %w", err)
}
ci := fs.GetConfig(ctx)
f := &Fs{
name: name,
opt: *opt,
ci: ci,
pacer: fs.NewPacer(ctx, pacer.NewDefault(pacer.MinSleep(minSleep), pacer.MaxSleep(maxSleep), pacer.DecayConstant(decayConstant))),
}
f.batcher, err = newBatcher(ctx, f, f.opt.BatchMode, f.opt.BatchSize, time.Duration(f.opt.BatchTimeout))
if err != nil {
return nil, err
}
cfg := dropbox.Config{
LogLevel: dropbox.LogOff, // logging in the SDK: LogOff, LogDebug, LogInfo
Client: oAuthClient, // maybe???
HeaderGenerator: f.headerGenerator,
}
// unauthorized config for endpoints that fail with auth
ucfg := dropbox.Config{
LogLevel: dropbox.LogOff, // logging in the SDK: LogOff, LogDebug, LogInfo
}
// NOTE: needs to be created pre-impersonation so we can look up the impersonated user
f.team = team.New(cfg)
if opt.Impersonate != "" {
user := team.UserSelectorArg{
Email: opt.Impersonate,
}
user.Tag = "email"
members := []*team.UserSelectorArg{&user}
args := team.NewMembersGetInfoArgs(members)
memberIds, err := f.team.MembersGetInfo(args)
if err != nil {
return nil, fmt.Errorf("invalid dropbox team member: %q: %w", opt.Impersonate, err)
}
if len(memberIds) == 0 || memberIds[0].MemberInfo == nil || memberIds[0].MemberInfo.Profile == nil {
return nil, fmt.Errorf("dropbox team member not found: %q", opt.Impersonate)
}
cfg.AsMemberID = memberIds[0].MemberInfo.Profile.MemberProfile.TeamMemberId
}
f.srv = files.New(cfg)
f.svc = files.New(ucfg)
f.sharing = sharing.New(cfg)
f.users = users.New(cfg)
f.features = (&fs.Features{
CaseInsensitive: true,
ReadMimeType: false,
CanHaveEmptyDirectories: true,
})
// do not fill features yet
if f.opt.SharedFiles {
f.setRoot(root)
if f.root == "" {
return f, nil
}
_, err := f.findSharedFile(ctx, f.root)
f.root = ""
if err == nil {
return f, fs.ErrorIsFile
}
return f, nil
}
if f.opt.SharedFolders {
f.setRoot(root)
if f.root == "" {
return f, nil // our root it empty so we probably want to list shared folders
}
dir := path.Dir(f.root)
if dir == "." {
dir = f.root
}
// root is not empty so we have find the right shared folder if it exists
id, err := f.findSharedFolder(ctx, dir)
if err != nil {
// if we didn't find the specified shared folder we have to bail out here
return nil, err
}
// we found the specified shared folder so let's mount it
// this will add it to the users normal root namespace and allows us
// to actually perform operations on it using the normal api endpoints.
err = f.mountSharedFolder(ctx, id)
if err != nil {
switch e := err.(type) {
case sharing.MountFolderAPIError:
if e.EndpointError == nil || (e.EndpointError != nil && e.EndpointError.Tag != sharing.MountFolderErrorAlreadyMounted) {
return nil, err
}
default:
return nil, err
}
// if the moint failed we have to abort here
}
// if the mount succeeded it's now a normal folder in the users root namespace
// we disable shared folder mode and proceed normally
f.opt.SharedFolders = false
}
f.features.Fill(ctx, f)
// If root starts with / then use the actual root
if strings.HasPrefix(root, "/") {
var acc *users.FullAccount
err = f.pacer.Call(func() (bool, error) {
acc, err = f.users.GetCurrentAccount()
return shouldRetry(ctx, err)
})
if err != nil {
return nil, fmt.Errorf("get current account failed: %w", err)
}
switch x := acc.RootInfo.(type) {
case *common.TeamRootInfo:
f.ns = x.RootNamespaceId
case *common.UserRootInfo:
f.ns = x.RootNamespaceId
default:
return nil, fmt.Errorf("unknown RootInfo type %v %T", acc.RootInfo, acc.RootInfo)
}
fs.Debugf(f, "Using root namespace %q", f.ns)
}
f.setRoot(root)
// See if the root is actually an object
if f.root != "" {
_, err = f.getFileMetadata(ctx, f.slashRoot)
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
}
// headerGenerator for dropbox sdk
func (f *Fs) headerGenerator(hostType string, namespace string, route string) map[string]string {
if f.ns == "" {
return map[string]string{}
}
return map[string]string{
"Dropbox-API-Path-Root": `{".tag": "namespace_id", "namespace_id": "` + f.ns + `"}`,
}
}
// Sets root in f
func (f *Fs) setRoot(root string) {
f.root = strings.Trim(root, "/")
f.slashRoot = "/" + f.root
f.slashRootSlash = f.slashRoot
if f.root != "" {
f.slashRootSlash += "/"
}
}
// getMetadata gets the metadata for a file or directory
func (f *Fs) getMetadata(ctx context.Context, objPath string) (entry files.IsMetadata, notFound bool, err error) {
err = f.pacer.Call(func() (bool, error) {
entry, err = f.srv.GetMetadata(&files.GetMetadataArg{
Path: f.opt.Enc.FromStandardPath(objPath),
})
return shouldRetry(ctx, err)
})
if err != nil {
switch e := err.(type) {
case files.GetMetadataAPIError:
if e.EndpointError != nil && e.EndpointError.Path != nil && e.EndpointError.Path.Tag == files.LookupErrorNotFound {
notFound = true
err = nil
}
}
}
return
}
// getFileMetadata gets the metadata for a file
func (f *Fs) getFileMetadata(ctx context.Context, filePath string) (fileInfo *files.FileMetadata, err error) {
entry, notFound, err := f.getMetadata(ctx, filePath)
if err != nil {
return nil, err
}
if notFound {
return nil, fs.ErrorObjectNotFound
}
fileInfo, ok := entry.(*files.FileMetadata)
if !ok {
if _, ok = entry.(*files.FolderMetadata); ok {
return nil, fs.ErrorIsDir
}
return nil, fs.ErrorNotAFile
}
return fileInfo, nil
}
// getDirMetadata gets the metadata for a directory
func (f *Fs) getDirMetadata(ctx context.Context, dirPath string) (dirInfo *files.FolderMetadata, err error) {
entry, notFound, err := f.getMetadata(ctx, dirPath)
if err != nil {
return nil, err
}
if notFound {
return nil, fs.ErrorDirNotFound
}
dirInfo, ok := entry.(*files.FolderMetadata)
if !ok {
return nil, fs.ErrorIsFile
}
return dirInfo, 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 *files.FileMetadata) (fs.Object, error) {
o := &Object{
fs: f,
remote: remote,
}
var err error
if info != nil {
err = o.setMetadataFromEntry(info)
} else {
err = o.readEntryAndSetMetadata(ctx)
}
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) {
if f.opt.SharedFiles {
return f.findSharedFile(ctx, remote)
}
return f.newObjectWithInfo(ctx, remote, nil)
}
// listSharedFoldersApi lists all available shared folders mounted and not mounted
// we'll need the id later so we have to return them in original format
func (f *Fs) listSharedFolders(ctx context.Context) (entries fs.DirEntries, err error) {
started := false
var res *sharing.ListFoldersResult
for {
if !started {
arg := sharing.ListFoldersArgs{
Limit: 100,
}
err := f.pacer.Call(func() (bool, error) {
res, err = f.sharing.ListFolders(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
return nil, err
}
started = true
} else {
arg := sharing.ListFoldersContinueArg{
Cursor: res.Cursor,
}
err := f.pacer.Call(func() (bool, error) {
res, err = f.sharing.ListFoldersContinue(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
return nil, fmt.Errorf("list continue: %w", err)
}
}
for _, entry := range res.Entries {
leaf := f.opt.Enc.ToStandardName(entry.Name)
d := fs.NewDir(leaf, time.Now()).SetID(entry.SharedFolderId)
entries = append(entries, d)
if err != nil {
return nil, err
}
}
if res.Cursor == "" {
break
}
}
return entries, nil
}
// findSharedFolder find the id for a given shared folder name
// somewhat annoyingly there is no endpoint to query a shared folder by it's name
// so our only option is to iterate over all shared folders
func (f *Fs) findSharedFolder(ctx context.Context, name string) (id string, err error) {
entries, err := f.listSharedFolders(ctx)
if err != nil {
return "", err
}
for _, entry := range entries {
if entry.(*fs.Dir).Remote() == name {
return entry.(*fs.Dir).ID(), nil
}
}
return "", fs.ErrorDirNotFound
}
// mountSharedFolder mount a shared folder to the root namespace
func (f *Fs) mountSharedFolder(ctx context.Context, id string) error {
arg := sharing.MountFolderArg{
SharedFolderId: id,
}
err := f.pacer.Call(func() (bool, error) {
_, err := f.sharing.MountFolder(&arg)
return shouldRetry(ctx, err)
})
return err
}
// listReceivedFiles lists shared the user as access to (note this means individual
// files not files contained in shared folders)
func (f *Fs) listReceivedFiles(ctx context.Context) (entries fs.DirEntries, err error) {
started := false
var res *sharing.ListFilesResult
for {
if !started {
arg := sharing.ListFilesArg{
Limit: 100,
}
err := f.pacer.Call(func() (bool, error) {
res, err = f.sharing.ListReceivedFiles(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
return nil, err
}
started = true
} else {
arg := sharing.ListFilesContinueArg{
Cursor: res.Cursor,
}
err := f.pacer.Call(func() (bool, error) {
res, err = f.sharing.ListReceivedFilesContinue(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
return nil, fmt.Errorf("list continue: %w", err)
}
}
for _, entry := range res.Entries {
fmt.Printf("%+v\n", entry)
entryPath := entry.Name
o := &Object{
fs: f,
url: entry.PreviewUrl,
remote: entryPath,
modTime: *entry.TimeInvited,
}
if err != nil {
return nil, err
}
entries = append(entries, o)
}
if res.Cursor == "" {
break
}
}
return entries, nil
}
func (f *Fs) findSharedFile(ctx context.Context, name string) (o *Object, err error) {
files, err := f.listReceivedFiles(ctx)
if err != nil {
return nil, err
}
for _, entry := range files {
if entry.(*Object).remote == name {
return entry.(*Object), nil
}
}
return nil, fs.ErrorObjectNotFound
}
// 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) {
if f.opt.SharedFiles {
return f.listReceivedFiles(ctx)
}
if f.opt.SharedFolders {
return f.listSharedFolders(ctx)
}
root := f.slashRoot
if dir != "" {
root += "/" + dir
}
started := false
var res *files.ListFolderResult
for {
if !started {
arg := files.ListFolderArg{
Path: f.opt.Enc.FromStandardPath(root),
Recursive: false,
Limit: 1000,
}
if root == "/" {
arg.Path = "" // Specify root folder as empty string
}
err = f.pacer.Call(func() (bool, error) {
res, err = f.srv.ListFolder(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
switch e := err.(type) {
case files.ListFolderAPIError:
if e.EndpointError != nil && e.EndpointError.Path != nil && e.EndpointError.Path.Tag == files.LookupErrorNotFound {
err = fs.ErrorDirNotFound
}
}
return nil, err
}
started = true
} else {
arg := files.ListFolderContinueArg{
Cursor: res.Cursor,
}
err = f.pacer.Call(func() (bool, error) {
res, err = f.srv.ListFolderContinue(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
return nil, fmt.Errorf("list continue: %w", err)
}
}
for _, entry := range res.Entries {
var fileInfo *files.FileMetadata
var folderInfo *files.FolderMetadata
var metadata *files.Metadata
switch info := entry.(type) {
case *files.FolderMetadata:
folderInfo = info
metadata = &info.Metadata
case *files.FileMetadata:
fileInfo = info
metadata = &info.Metadata
default:
fs.Errorf(f, "Unknown type %T", entry)
continue
}
// Only the last element is reliably cased in PathDisplay
entryPath := metadata.PathDisplay
leaf := f.opt.Enc.ToStandardName(path.Base(entryPath))
remote := path.Join(dir, leaf)
if folderInfo != nil {
d := fs.NewDir(remote, time.Now()).SetID(folderInfo.Id)
entries = append(entries, d)
} else if fileInfo != nil {
o, err := f.newObjectWithInfo(ctx, remote, fileInfo)
if err != nil {
return nil, err
}
entries = append(entries, o)
}
}
if !res.HasMore {
break
}
}
return entries, nil
}
// Put the object
//
// 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) {
if f.opt.SharedFiles || f.opt.SharedFolders {
return nil, errNotSupportedInSharedMode
}
// 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 container if it doesn't exist
func (f *Fs) Mkdir(ctx context.Context, dir string) error {
if f.opt.SharedFiles || f.opt.SharedFolders {
return errNotSupportedInSharedMode
}
root := path.Join(f.slashRoot, dir)
// can't create or run metadata on root
if root == "/" {
return nil
}
// check directory doesn't exist
_, err := f.getDirMetadata(ctx, root)
if err == nil {
return nil // directory exists already
} else if err != fs.ErrorDirNotFound {
return err // some other error
}
// create it
arg2 := files.CreateFolderArg{
Path: f.opt.Enc.FromStandardPath(root),
}
// Don't attempt to create filenames that are too long
if cErr := checkPathLength(arg2.Path); cErr != nil {
return cErr
}
err = f.pacer.Call(func() (bool, error) {
_, err = f.srv.CreateFolderV2(&arg2)
return shouldRetry(ctx, err)
})
return err
}
// purgeCheck removes the root directory, if check is set then it
// refuses to do so if it has anything in
func (f *Fs) purgeCheck(ctx context.Context, dir string, check bool) (err error) {
root := path.Join(f.slashRoot, dir)
// can't remove root
if root == "/" {
return errors.New("can't remove root directory")
}
if check {
// check directory exists
_, err = f.getDirMetadata(ctx, root)
if err != nil {
return fmt.Errorf("Rmdir: %w", err)
}
root = f.opt.Enc.FromStandardPath(root)
// check directory empty
arg := files.ListFolderArg{
Path: root,
Recursive: false,
}
if root == "/" {
arg.Path = "" // Specify root folder as empty string
}
var res *files.ListFolderResult
err = f.pacer.Call(func() (bool, error) {
res, err = f.srv.ListFolder(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
return fmt.Errorf("Rmdir: %w", err)
}
if len(res.Entries) != 0 {
return errors.New("directory not empty")
}
}
// remove it
err = f.pacer.Call(func() (bool, error) {
_, err = f.srv.DeleteV2(&files.DeleteArg{Path: root})
return shouldRetry(ctx, err)
})
return err
}
// Rmdir deletes the container
//
// Returns an error if it isn't empty
func (f *Fs) Rmdir(ctx context.Context, dir string) error {
if f.opt.SharedFiles || f.opt.SharedFolders {
return errNotSupportedInSharedMode
}
return f.purgeCheck(ctx, dir, true)
}
// Precision returns the precision
func (f *Fs) Precision() time.Duration {
return time.Second
}
// 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) {
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,
}
// Copy
arg := files.RelocationArg{
RelocationPath: files.RelocationPath{
FromPath: f.opt.Enc.FromStandardPath(srcObj.remotePath()),
ToPath: f.opt.Enc.FromStandardPath(dstObj.remotePath()),
},
}
var err error
var result *files.RelocationResult
err = f.pacer.Call(func() (bool, error) {
result, err = f.srv.CopyV2(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
return nil, fmt.Errorf("copy failed: %w", err)
}
// Set the metadata
fileInfo, ok := result.Metadata.(*files.FileMetadata)
if !ok {
return nil, fs.ErrorNotAFile
}
err = dstObj.setMetadataFromEntry(fileInfo)
if err != nil {
return nil, fmt.Errorf("copy failed: %w", err)
}
return dstObj, nil
}
// Purge deletes all the files and the container
//
// Optional interface: Only implement this if you have a way of
// deleting all the files quicker than just running Remove() on the
// result of List()
func (f *Fs) Purge(ctx context.Context, dir string) (err error) {
return f.purgeCheck(ctx, dir, false)
}
// Move src to this remote using server-side move 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.ErrorCantMove
func (f *Fs) Move(ctx context.Context, src fs.Object, remote string) (fs.Object, error) {
srcObj, ok := src.(*Object)
if !ok {
fs.Debugf(src, "Can't move - not same remote type")
return nil, fs.ErrorCantMove
}
// Temporary Object under construction
dstObj := &Object{
fs: f,
remote: remote,
}
// Do the move
arg := files.RelocationArg{
RelocationPath: files.RelocationPath{
FromPath: f.opt.Enc.FromStandardPath(srcObj.remotePath()),
ToPath: f.opt.Enc.FromStandardPath(dstObj.remotePath()),
},
}
var err error
var result *files.RelocationResult
err = f.pacer.Call(func() (bool, error) {
result, err = f.srv.MoveV2(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
return nil, fmt.Errorf("move failed: %w", err)
}
// Set the metadata
fileInfo, ok := result.Metadata.(*files.FileMetadata)
if !ok {
return nil, fs.ErrorNotAFile
}
err = dstObj.setMetadataFromEntry(fileInfo)
if err != nil {
return nil, fmt.Errorf("move failed: %w", err)
}
return dstObj, nil
}
// PublicLink adds a "readable by anyone with link" permission on the given file or folder.
func (f *Fs) PublicLink(ctx context.Context, remote string, expire fs.Duration, unlink bool) (link string, err error) {
absPath := f.opt.Enc.FromStandardPath(path.Join(f.slashRoot, remote))
fs.Debugf(f, "attempting to share '%s' (absolute path: %s)", remote, absPath)
createArg := sharing.CreateSharedLinkWithSettingsArg{
Path: absPath,
Settings: &sharing.SharedLinkSettings{
RequestedVisibility: &sharing.RequestedVisibility{
Tagged: dropbox.Tagged{Tag: sharing.RequestedVisibilityPublic},
},
Audience: &sharing.LinkAudience{
Tagged: dropbox.Tagged{Tag: sharing.LinkAudiencePublic},
},
Access: &sharing.RequestedLinkAccessLevel{
Tagged: dropbox.Tagged{Tag: sharing.RequestedLinkAccessLevelViewer},
},
},
}
if expire < fs.DurationOff {
expiryTime := time.Now().Add(time.Duration(expire)).UTC().Round(time.Second)
createArg.Settings.Expires = &expiryTime
}
var linkRes sharing.IsSharedLinkMetadata
err = f.pacer.Call(func() (bool, error) {
linkRes, err = f.sharing.CreateSharedLinkWithSettings(&createArg)
return shouldRetry(ctx, err)
})
if err != nil && strings.Contains(err.Error(),
sharing.CreateSharedLinkWithSettingsErrorSharedLinkAlreadyExists) {
fs.Debugf(absPath, "has a public link already, attempting to retrieve it")
listArg := sharing.ListSharedLinksArg{
Path: absPath,
DirectOnly: true,
}
var listRes *sharing.ListSharedLinksResult
err = f.pacer.Call(func() (bool, error) {
listRes, err = f.sharing.ListSharedLinks(&listArg)
return shouldRetry(ctx, err)
})
if err != nil {
return
}
if len(listRes.Links) == 0 {
err = errors.New("sharing link already exists, but list came back empty")
return
}
linkRes = listRes.Links[0]
}
if err == nil {
switch res := linkRes.(type) {
case *sharing.FileLinkMetadata:
link = res.Url
case *sharing.FolderLinkMetadata:
link = res.Url
default:
err = fmt.Errorf("don't know how to extract link, response has unknown format: %T", res)
}
}
return
}
// DirMove moves src, srcRemote to this remote at dstRemote
// using server-side move operations.
//
// Will only be called if src.Fs().Name() == f.Name()
//
// If it isn't possible then return fs.ErrorCantDirMove
//
// If destination exists then return fs.ErrorDirExists
func (f *Fs) DirMove(ctx context.Context, src fs.Fs, srcRemote, dstRemote string) error {
srcFs, ok := src.(*Fs)
if !ok {
fs.Debugf(srcFs, "Can't move directory - not same remote type")
return fs.ErrorCantDirMove
}
srcPath := path.Join(srcFs.slashRoot, srcRemote)
dstPath := path.Join(f.slashRoot, dstRemote)
// Check if destination exists
_, err := f.getDirMetadata(ctx, dstPath)
if err == nil {
return fs.ErrorDirExists
} else if err != fs.ErrorDirNotFound {
return err
}
// Make sure the parent directory exists
// ...apparently not necessary
// Do the move
arg := files.RelocationArg{
RelocationPath: files.RelocationPath{
FromPath: f.opt.Enc.FromStandardPath(srcPath),
ToPath: f.opt.Enc.FromStandardPath(dstPath),
},
}
err = f.pacer.Call(func() (bool, error) {
_, err = f.srv.MoveV2(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
return fmt.Errorf("MoveDir failed: %w", err)
}
return nil
}
// About gets quota information
func (f *Fs) About(ctx context.Context) (usage *fs.Usage, err error) {
var q *users.SpaceUsage
err = f.pacer.Call(func() (bool, error) {
q, err = f.users.GetSpaceUsage()
return shouldRetry(ctx, err)
})
if err != nil {
return nil, err
}
var total uint64
if q.Allocation != nil {
if q.Allocation.Individual != nil {
total += q.Allocation.Individual.Allocated
}
if q.Allocation.Team != nil {
total += q.Allocation.Team.Allocated
}
}
usage = &fs.Usage{
Total: fs.NewUsageValue(int64(total)), // quota of bytes that can be used
Used: fs.NewUsageValue(int64(q.Used)), // bytes in use
Free: fs.NewUsageValue(int64(total - q.Used)), // bytes which can be uploaded before reaching the quota
}
return usage, nil
}
// ChangeNotify calls the passed function with a path that has had changes.
// If the implementation uses polling, it should adhere to the given interval.
//
// Automatically restarts itself in case of unexpected behavior of the remote.
//
// Close the returned channel to stop being notified.
func (f *Fs) ChangeNotify(ctx context.Context, notifyFunc func(string, fs.EntryType), pollIntervalChan <-chan time.Duration) {
go func() {
// get the StartCursor early so all changes from now on get processed
startCursor, err := f.changeNotifyCursor(ctx)
if err != nil {
fs.Infof(f, "Failed to get StartCursor: %s", err)
}
var ticker *time.Ticker
var tickerC <-chan time.Time
for {
select {
case pollInterval, ok := <-pollIntervalChan:
if !ok {
if ticker != nil {
ticker.Stop()
}
return
}
if ticker != nil {
ticker.Stop()
ticker, tickerC = nil, nil
}
if pollInterval != 0 {
ticker = time.NewTicker(pollInterval)
tickerC = ticker.C
}
case <-tickerC:
if startCursor == "" {
startCursor, err = f.changeNotifyCursor(ctx)
if err != nil {
fs.Infof(f, "Failed to get StartCursor: %s", err)
continue
}
}
fs.Debugf(f, "Checking for changes on remote")
startCursor, err = f.changeNotifyRunner(ctx, notifyFunc, startCursor)
if err != nil {
fs.Infof(f, "Change notify listener failure: %s", err)
}
}
}
}()
}
func (f *Fs) changeNotifyCursor(ctx context.Context) (cursor string, err error) {
var startCursor *files.ListFolderGetLatestCursorResult
err = f.pacer.Call(func() (bool, error) {
arg := files.ListFolderArg{
Path: f.opt.Enc.FromStandardPath(f.slashRoot),
Recursive: true,
}
if arg.Path == "/" {
arg.Path = ""
}
startCursor, err = f.srv.ListFolderGetLatestCursor(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
return
}
return startCursor.Cursor, nil
}
func (f *Fs) changeNotifyRunner(ctx context.Context, notifyFunc func(string, fs.EntryType), startCursor string) (newCursor string, err error) {
cursor := startCursor
var res *files.ListFolderLongpollResult
// Dropbox sets a timeout range of 30 - 480
timeout := uint64(f.ci.TimeoutOrInfinite() / time.Second)
if timeout < 30 {
timeout = 30
fs.Debugf(f, "Increasing poll interval to minimum 30s")
}
if timeout > 480 {
timeout = 480
fs.Debugf(f, "Decreasing poll interval to maximum 480s")
}
err = f.pacer.Call(func() (bool, error) {
args := files.ListFolderLongpollArg{
Cursor: cursor,
Timeout: timeout,
}
res, err = f.svc.ListFolderLongpoll(&args)
return shouldRetry(ctx, err)
})
if err != nil {
return
}
if !res.Changes {
return cursor, nil
}
if res.Backoff != 0 {
fs.Debugf(f, "Waiting to poll for %d seconds", res.Backoff)
time.Sleep(time.Duration(res.Backoff) * time.Second)
}
for {
var changeList *files.ListFolderResult
arg := files.ListFolderContinueArg{
Cursor: cursor,
}
err = f.pacer.Call(func() (bool, error) {
changeList, err = f.srv.ListFolderContinue(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
return "", fmt.Errorf("list continue: %w", err)
}
cursor = changeList.Cursor
var entryType fs.EntryType
for _, entry := range changeList.Entries {
entryPath := ""
switch info := entry.(type) {
case *files.FolderMetadata:
entryType = fs.EntryDirectory
entryPath = strings.TrimPrefix(info.PathDisplay, f.slashRootSlash)
case *files.FileMetadata:
entryType = fs.EntryObject
entryPath = strings.TrimPrefix(info.PathDisplay, f.slashRootSlash)
case *files.DeletedMetadata:
entryType = fs.EntryObject
entryPath = strings.TrimPrefix(info.PathDisplay, f.slashRootSlash)
default:
fs.Errorf(entry, "dropbox ChangeNotify: ignoring unknown EntryType %T", entry)
continue
}
if entryPath != "" {
notifyFunc(f.opt.Enc.ToStandardPath(entryPath), entryType)
}
}
if !changeList.HasMore {
break
}
}
return cursor, nil
}
// Hashes returns the supported hash sets.
func (f *Fs) Hashes() hash.Set {
return hash.Set(DbHashType)
}
// Shutdown the backend, closing any background tasks and any
// cached connections.
func (f *Fs) Shutdown(ctx context.Context) error {
f.batcher.Shutdown()
return nil
}
// ------------------------------------------------------------
// 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 "<nil>"
}
return o.remote
}
// Remote returns the remote path
func (o *Object) Remote() string {
return o.remote
}
// ID returns the object id
func (o *Object) ID() string {
return o.id
}
// Hash returns the dropbox special hash
func (o *Object) Hash(ctx context.Context, t hash.Type) (string, error) {
if o.fs.opt.SharedFiles || o.fs.opt.SharedFolders {
return "", errNotSupportedInSharedMode
}
if t != DbHashType {
return "", hash.ErrUnsupported
}
err := o.readMetaData(ctx)
if err != nil {
return "", fmt.Errorf("failed to read hash from metadata: %w", err)
}
return o.hash, nil
}
// Size returns the size of an object in bytes
func (o *Object) Size() int64 {
return o.bytes
}
// setMetadataFromEntry sets the fs data from a files.FileMetadata
//
// This isn't a complete set of metadata and has an inaccurate date
func (o *Object) setMetadataFromEntry(info *files.FileMetadata) error {
o.id = info.Id
o.bytes = int64(info.Size)
o.modTime = info.ClientModified
o.hash = info.ContentHash
return nil
}
// Reads the entry for a file from dropbox
func (o *Object) readEntry(ctx context.Context) (*files.FileMetadata, error) {
return o.fs.getFileMetadata(ctx, o.remotePath())
}
// Read entry if not set and set metadata from it
func (o *Object) readEntryAndSetMetadata(ctx context.Context) error {
// Last resort set time from client
if !o.modTime.IsZero() {
return nil
}
entry, err := o.readEntry(ctx)
if err != nil {
return err
}
return o.setMetadataFromEntry(entry)
}
// Returns the remote path for the object
func (o *Object) remotePath() string {
return o.fs.slashRootSlash + o.remote
}
// readMetaData gets the info if it hasn't already been fetched
func (o *Object) readMetaData(ctx context.Context) (err error) {
if !o.modTime.IsZero() {
return nil
}
// Last resort
return o.readEntryAndSetMetadata(ctx)
}
// 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.Debugf(o, "Failed to read metadata: %v", err)
return time.Now()
}
return o.modTime
}
// SetModTime sets the modification time of the local fs object
//
// Commits the datastore
func (o *Object) SetModTime(ctx context.Context, modTime time.Time) error {
// Dropbox doesn't have a way of doing this so returning this
// error will cause the file to be deleted first then
// re-uploaded to set the time.
return fs.ErrorCantSetModTimeWithoutDelete
}
// Storable returns 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) {
if o.fs.opt.SharedFiles {
if len(options) != 0 {
return nil, errors.New("OpenOptions not supported for shared files")
}
arg := sharing.GetSharedLinkMetadataArg{
Url: o.url,
}
err = o.fs.pacer.Call(func() (bool, error) {
_, in, err = o.fs.sharing.GetSharedLinkFile(&arg)
return shouldRetry(ctx, err)
})
if err != nil {
return nil, err
}
return
}
fs.FixRangeOption(options, o.bytes)
headers := fs.OpenOptionHeaders(options)
arg := files.DownloadArg{
Path: o.id,
ExtraHeaders: headers,
}
err = o.fs.pacer.Call(func() (bool, error) {
_, in, err = o.fs.srv.Download(&arg)
return shouldRetry(ctx, err)
})
switch e := err.(type) {
case files.DownloadAPIError:
// Don't attempt to retry copyright violation errors
if e.EndpointError != nil && e.EndpointError.Path != nil && e.EndpointError.Path.Tag == files.LookupErrorRestrictedContent {
return nil, fserrors.NoRetryError(err)
}
}
return
}
// uploadChunked uploads the object in parts
//
// Will introduce two additional network requests to start and finish the session.
// If the size is unknown (i.e. -1) the method incurs one additional
// request to the Dropbox API that does not carry a payload to close the append session.
func (o *Object) uploadChunked(ctx context.Context, in0 io.Reader, commitInfo *files.CommitInfo, size int64) (entry *files.FileMetadata, err error) {
// start upload
var res *files.UploadSessionStartResult
err = o.fs.pacer.Call(func() (bool, error) {
res, err = o.fs.srv.UploadSessionStart(&files.UploadSessionStartArg{}, nil)
return shouldRetry(ctx, err)
})
if err != nil {
return nil, err
}
chunkSize := int64(o.fs.opt.ChunkSize)
chunks, remainder := size/chunkSize, size%chunkSize
if remainder > 0 {
chunks++
}
// write chunks
in := readers.NewCountingReader(in0)
buf := make([]byte, int(chunkSize))
cursor := files.UploadSessionCursor{
SessionId: res.SessionId,
Offset: 0,
}
appendArg := files.UploadSessionAppendArg{Cursor: &cursor}
for currentChunk := 1; ; currentChunk++ {
cursor.Offset = in.BytesRead()
if chunks < 0 {
fs.Debugf(o, "Streaming chunk %d/unknown", currentChunk)
} else {
fs.Debugf(o, "Uploading chunk %d/%d", currentChunk, chunks)
}
chunk := readers.NewRepeatableLimitReaderBuffer(in, buf, chunkSize)
skip := int64(0)
err = o.fs.pacer.Call(func() (bool, error) {
// seek to the start in case this is a retry
if _, err = chunk.Seek(skip, io.SeekStart); err != nil {
return false, err
}
err = o.fs.srv.UploadSessionAppendV2(&appendArg, chunk)
// after session is started, we retry everything
if err != nil {
// Check for incorrect offset error and retry with new offset
if uErr, ok := err.(files.UploadSessionAppendV2APIError); ok {
if uErr.EndpointError != nil && uErr.EndpointError.IncorrectOffset != nil {
correctOffset := uErr.EndpointError.IncorrectOffset.CorrectOffset
delta := int64(correctOffset) - int64(cursor.Offset)
skip += delta
what := fmt.Sprintf("incorrect offset error received: sent %d, need %d, skip %d", cursor.Offset, correctOffset, skip)
if skip < 0 {
return false, fmt.Errorf("can't seek backwards to correct offset: %s", what)
} else if skip == chunkSize {
fs.Debugf(o, "%s: chunk received OK - continuing", what)
return false, nil
} else if skip > chunkSize {
// This error should never happen
return false, fmt.Errorf("can't seek forwards by more than a chunk to correct offset: %s", what)
}
// Skip the sent data on next retry
cursor.Offset = uint64(int64(cursor.Offset) + delta)
fs.Debugf(o, "%s: skipping bytes on retry to fix offset", what)
}
}
}
return err != nil, err
})
if err != nil {
return nil, err
}
if appendArg.Close {
break
}
if size > 0 {
// if size is known, check if next chunk is final
appendArg.Close = uint64(size)-in.BytesRead() <= uint64(chunkSize)
if in.BytesRead() > uint64(size) {
return nil, fmt.Errorf("expected %d bytes in input, but have read %d so far", size, in.BytesRead())
}
} else {
// if size is unknown, upload as long as we can read full chunks from the reader
appendArg.Close = in.BytesRead()-cursor.Offset < uint64(chunkSize)
}
}
// finish upload
cursor.Offset = in.BytesRead()
args := &files.UploadSessionFinishArg{
Cursor: &cursor,
Commit: commitInfo,
}
// If we are batching then we should have written all the data now
// store the commit info now for a batch commit
if o.fs.batcher.Batching() {
return o.fs.batcher.Commit(ctx, args)
}
err = o.fs.pacer.Call(func() (bool, error) {
entry, err = o.fs.srv.UploadSessionFinish(args, nil)
// If error is insufficient space then don't retry
if e, ok := err.(files.UploadSessionFinishAPIError); ok {
if e.EndpointError != nil && e.EndpointError.Path != nil && e.EndpointError.Path.Tag == files.WriteErrorInsufficientSpace {
err = fserrors.NoRetryError(err)
return false, err
}
}
// after the first chunk is uploaded, we retry everything
return err != nil, err
})
if err != nil {
return nil, err
}
return entry, nil
}
// checks all the parts of name to see they are below
// maxFileNameLength runes.
//
// This checks the length as runes which isn't quite right as dropbox
// seems to encode some symbols (eg ☺) as two "characters". This seems
// like utf-16 except that ☺ doesn't need two characters in utf-16.
//
// Using runes instead of what dropbox is using will work for most
// cases, and when it goes wrong we will upload something we should
// have detected as too long which is the least damaging way to fail.
func checkPathLength(name string) (err error) {
for next := ""; len(name) > 0; name = next {
if slash := strings.IndexRune(name, '/'); slash >= 0 {
name, next = name[:slash], name[slash+1:]
} else {
next = ""
}
length := utf8.RuneCountInString(name)
if length > maxFileNameLength {
return fserrors.NoRetryError(fs.ErrorFileNameTooLong)
}
}
return nil
}
// Update the already existing object
//
// Copy the reader into the object updating 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 {
if o.fs.opt.SharedFiles || o.fs.opt.SharedFolders {
return errNotSupportedInSharedMode
}
remote := o.remotePath()
if ignoredFiles.MatchString(remote) {
return fserrors.NoRetryError(fmt.Errorf("file name %q is disallowed - not uploading", path.Base(remote)))
}
commitInfo := files.NewCommitInfo(o.fs.opt.Enc.FromStandardPath(o.remotePath()))
commitInfo.Mode.Tag = "overwrite"
// The Dropbox API only accepts timestamps in UTC with second precision.
clientModified := src.ModTime(ctx).UTC().Round(time.Second)
commitInfo.ClientModified = &clientModified
// Don't attempt to create filenames that are too long
if cErr := checkPathLength(commitInfo.Path); cErr != nil {
return cErr
}
size := src.Size()
var err error
var entry *files.FileMetadata
if size > int64(o.fs.opt.ChunkSize) || size < 0 || o.fs.batcher.Batching() {
entry, err = o.uploadChunked(ctx, in, commitInfo, size)
} else {
err = o.fs.pacer.CallNoRetry(func() (bool, error) {
entry, err = o.fs.srv.Upload(&files.UploadArg{CommitInfo: *commitInfo}, in)
return shouldRetry(ctx, err)
})
}
if err != nil {
return fmt.Errorf("upload failed: %w", err)
}
// If we haven't received data back from batch upload then fake it
//
// This will only happen if we are uploading async batches
if entry == nil {
o.bytes = size
o.modTime = *commitInfo.ClientModified
o.hash = "" // we don't have this
return nil
}
return o.setMetadataFromEntry(entry)
}
// Remove an object
func (o *Object) Remove(ctx context.Context) (err error) {
if o.fs.opt.SharedFiles || o.fs.opt.SharedFolders {
return errNotSupportedInSharedMode
}
err = o.fs.pacer.Call(func() (bool, error) {
_, err = o.fs.srv.DeleteV2(&files.DeleteArg{
Path: o.fs.opt.Enc.FromStandardPath(o.remotePath()),
})
return shouldRetry(ctx, err)
})
return err
}
// Check the interfaces are satisfied
var (
_ fs.Fs = (*Fs)(nil)
_ fs.Copier = (*Fs)(nil)
_ fs.Purger = (*Fs)(nil)
_ fs.PutStreamer = (*Fs)(nil)
_ fs.Mover = (*Fs)(nil)
_ fs.PublicLinker = (*Fs)(nil)
_ fs.DirMover = (*Fs)(nil)
_ fs.Abouter = (*Fs)(nil)
_ fs.Shutdowner = &Fs{}
_ fs.Object = (*Object)(nil)
_ fs.IDer = (*Object)(nil)
)
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