rclone/backend/webdav/webdav.go
Nick Craig-Wood 11da2a6c9b Break the fs package up into smaller parts.
The purpose of this is to make it easier to maintain and eventually to
allow the rclone backends to be re-used in other projects without
having to use the rclone configuration system.

The new code layout is documented in CONTRIBUTING.
2018-01-15 17:51:14 +00:00

933 lines
24 KiB
Go

// Package webdav provides an interface to the Webdav
// object storage system.
package webdav
// Owncloud: Getting Oc-Checksum:
// SHA1:f572d396fae9206628714fb2ce00f72e94f2258f on HEAD but not on
// nextcloud?
// docs for file webdav
// https://docs.nextcloud.com/server/12/developer_manual/client_apis/WebDAV/index.html
// indicates checksums can be set as metadata here
// https://github.com/nextcloud/server/issues/6129
// owncloud seems to have checksums as metadata though - can read them
// SetModTime might be possible
// https://stackoverflow.com/questions/3579608/webdav-can-a-client-modify-the-mtime-of-a-file
// ...support for a PROPSET to lastmodified (mind the missing get) which does the utime() call might be an option.
// For example the ownCloud WebDAV server does it that way.
import (
"fmt"
"io"
"net/http"
"net/url"
"path"
"regexp"
"strings"
"time"
"github.com/ncw/rclone/backend/webdav/api"
"github.com/ncw/rclone/fs"
"github.com/ncw/rclone/fs/config"
"github.com/ncw/rclone/fs/fserrors"
"github.com/ncw/rclone/fs/fshttp"
"github.com/ncw/rclone/fs/hash"
"github.com/ncw/rclone/lib/pacer"
"github.com/ncw/rclone/lib/rest"
"github.com/pkg/errors"
)
const (
minSleep = 10 * time.Millisecond
maxSleep = 2 * time.Second
decayConstant = 2 // bigger for slower decay, exponential
)
// Register with Fs
func init() {
fs.Register(&fs.RegInfo{
Name: "webdav",
Description: "Webdav",
NewFs: NewFs,
Options: []fs.Option{{
Name: "url",
Help: "URL of http host to connect to",
Optional: false,
Examples: []fs.OptionExample{{
Value: "https://example.com",
Help: "Connect to example.com",
}},
}, {
Name: "vendor",
Help: "Name of the Webdav site/service/software you are using",
Optional: false,
Examples: []fs.OptionExample{{
Value: "nextcloud",
Help: "Nextcloud",
}, {
Value: "owncloud",
Help: "Owncloud",
}, {
Value: "other",
Help: "Other site/service or software",
}},
}, {
Name: "user",
Help: "User name",
Optional: true,
}, {
Name: "pass",
Help: "Password.",
Optional: true,
IsPassword: true,
}},
})
}
// Fs represents a remote webdav
type Fs struct {
name string // name of this remote
root string // the path we are working on
features *fs.Features // optional features
endpoint *url.URL // URL of the host
endpointURL string // endpoint as a string
srv *rest.Client // the connection to the one drive server
pacer *pacer.Pacer // pacer for API calls
user string // username
pass string // password
vendor string // name of the vendor
precision time.Duration // mod time precision
canStream bool // set if can stream
useOCMtime bool // set if can use X-OC-Mtime
}
// Object describes a webdav 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
hasMetaData bool // whether info below has been set
size int64 // size of the object
modTime time.Time // modification time of the object
id string // ID of the object
sha1 string // SHA-1 of the object content
}
// ------------------------------------------------------------
// 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("webdav root '%s'", f.root)
}
// Features returns the optional features of this Fs
func (f *Fs) Features() *fs.Features {
return f.features
}
// Pattern to match a webdav path
var matcher = regexp.MustCompile(`^([^/]*)(.*)$`)
// parsePath parses an webdav 'url'
func parsePath(path string) (root string) {
root = strings.Trim(path, "/")
return
}
// retryErrorCodes is a slice of error codes that we will retry
var retryErrorCodes = []int{
429, // Too Many Requests.
500, // Internal Server Error
502, // Bad Gateway
503, // Service Unavailable
504, // Gateway Timeout
509, // Bandwidth Limit Exceeded
}
// shouldRetry returns a boolean as to whether this resp and err
// deserve to be retried. It returns the err as a convenience
func shouldRetry(resp *http.Response, err error) (bool, error) {
return fserrors.ShouldRetry(err) || fserrors.ShouldRetryHTTP(resp, retryErrorCodes), err
}
// itemIsDir returns true if the item is a directory
//
// When a client sees a resourcetype it doesn't recognize it should
// assume it is a regular non-collection resource. [WebDav book by
// Lisa Dusseault ch 7.5.8 p170]
func itemIsDir(item *api.Response) bool {
if t := item.Props.Type; t != nil {
if t.Space == "DAV:" && t.Local == "collection" {
return true
}
fs.Debugf(nil, "Unknown resource type %q/%q on %q", t.Space, t.Local, item.Props.Name)
}
return false
}
// readMetaDataForPath reads the metadata from the path
func (f *Fs) readMetaDataForPath(path string) (info *api.Prop, err error) {
// FIXME how do we read back additional properties?
opts := rest.Opts{
Method: "PROPFIND",
Path: f.filePath(path),
}
var result api.Multistatus
var resp *http.Response
err = f.pacer.Call(func() (bool, error) {
resp, err = f.srv.CallXML(&opts, nil, &result)
return shouldRetry(resp, err)
})
if apiErr, ok := err.(*api.Error); ok {
// does not exist
if apiErr.StatusCode == http.StatusNotFound {
return nil, fs.ErrorObjectNotFound
}
}
if err != nil {
return nil, errors.Wrap(err, "read metadata failed")
}
if len(result.Responses) < 1 {
return nil, fs.ErrorObjectNotFound
}
item := result.Responses[0]
if !item.Props.StatusOK() {
return nil, fs.ErrorObjectNotFound
}
if itemIsDir(&item) {
return nil, fs.ErrorNotAFile
}
return &item.Props, nil
}
// errorHandler parses a non 2xx error response into an error
func errorHandler(resp *http.Response) error {
// Decode error response
errResponse := new(api.Error)
err := rest.DecodeXML(resp, &errResponse)
if err != nil {
fs.Debugf(nil, "Couldn't decode error response: %v", err)
}
errResponse.Status = resp.Status
errResponse.StatusCode = resp.StatusCode
return errResponse
}
// addShlash makes sure s is terminated with a / if non empty
func addSlash(s string) string {
if s != "" && !strings.HasSuffix(s, "/") {
s += "/"
}
return s
}
// filePath returns a file path (f.root, file)
func (f *Fs) filePath(file string) string {
return rest.URLPathEscape(path.Join(f.root, file))
}
// dirPath returns a directory path (f.root, dir)
func (f *Fs) dirPath(dir string) string {
return addSlash(f.filePath(dir))
}
// filePath returns a file path (f.root, remote)
func (o *Object) filePath() string {
return o.fs.filePath(o.remote)
}
// NewFs constructs an Fs from the path, container:path
func NewFs(name, root string) (fs.Fs, error) {
endpoint := config.FileGet(name, "url")
if !strings.HasSuffix(endpoint, "/") {
endpoint += "/"
}
user := config.FileGet(name, "user")
pass := config.FileGet(name, "pass")
if pass != "" {
var err error
pass, err = config.Reveal(pass)
if err != nil {
return nil, errors.Wrap(err, "couldn't decrypt password")
}
}
vendor := config.FileGet(name, "vendor")
// Parse the endpoint
u, err := url.Parse(endpoint)
if err != nil {
return nil, err
}
f := &Fs{
name: name,
root: root,
endpoint: u,
endpointURL: u.String(),
srv: rest.NewClient(fshttp.NewClient(fs.Config)).SetRoot(u.String()).SetUserPass(user, pass),
pacer: pacer.New().SetMinSleep(minSleep).SetMaxSleep(maxSleep).SetDecayConstant(decayConstant),
user: user,
pass: pass,
precision: fs.ModTimeNotSupported,
}
f.features = (&fs.Features{
CanHaveEmptyDirectories: true,
}).Fill(f)
f.srv.SetErrorHandler(errorHandler)
f.setQuirks(vendor)
if root != "" {
// Check to see if the root actually an existing file
remote := path.Base(root)
f.root = path.Dir(root)
if f.root == "." {
f.root = ""
}
_, err := f.NewObject(remote)
if err != nil {
if errors.Cause(err) == fs.ErrorObjectNotFound || errors.Cause(err) == fs.ErrorNotAFile {
// File doesn't exist so return old f
f.root = root
return f, nil
}
return nil, err
}
// return an error with an fs which points to the parent
return f, fs.ErrorIsFile
}
return f, nil
}
// setQuirks adjusts the Fs for the vendor passed in
func (f *Fs) setQuirks(vendor string) {
if vendor == "" {
vendor = "other"
}
f.vendor = vendor
switch vendor {
case "owncloud":
f.canStream = true
f.precision = time.Second
f.useOCMtime = true
case "nextcloud":
f.precision = time.Second
f.useOCMtime = true
case "other":
default:
fs.Debugf(f, "Unknown vendor %q", vendor)
}
// Remove PutStream from optional features
if !f.canStream {
f.features.PutStream = nil
}
}
// Return an Object from a path
//
// If it can't be found it returns the error fs.ErrorObjectNotFound.
func (f *Fs) newObjectWithInfo(remote string, info *api.Prop) (fs.Object, error) {
o := &Object{
fs: f,
remote: remote,
}
var err error
if info != nil {
// Set info
err = o.setMetaData(info)
} else {
err = o.readMetaData() // reads info and meta, returning an error
}
if err != nil {
return nil, err
}
return o, nil
}
// NewObject finds the Object at remote. If it can't be found
// it returns the error fs.ErrorObjectNotFound.
func (f *Fs) NewObject(remote string) (fs.Object, error) {
return f.newObjectWithInfo(remote, nil)
}
// list the objects into the function supplied
//
// If directories is set it only sends directories
// User function to process a File item from listAll
//
// Should return true to finish processing
type listAllFn func(string, bool, *api.Prop) bool
// Lists the directory required calling the user function on each item found
//
// If the user fn ever returns true then it early exits with found = true
func (f *Fs) listAll(dir string, directoriesOnly bool, filesOnly bool, fn listAllFn) (found bool, err error) {
opts := rest.Opts{
Method: "PROPFIND",
Path: f.dirPath(dir), // FIXME Should not start with /
ExtraHeaders: map[string]string{
"Depth": "1",
},
}
var result api.Multistatus
var resp *http.Response
err = f.pacer.Call(func() (bool, error) {
resp, err = f.srv.CallXML(&opts, nil, &result)
return shouldRetry(resp, err)
})
if err != nil {
if apiErr, ok := err.(*api.Error); ok {
// does not exist
if apiErr.StatusCode == http.StatusNotFound {
return found, fs.ErrorDirNotFound
}
}
return found, errors.Wrap(err, "couldn't list files")
}
//fmt.Printf("result = %#v", &result)
baseURL, err := rest.URLJoin(f.endpoint, opts.Path)
if err != nil {
return false, errors.Wrap(err, "couldn't join URL")
}
for i := range result.Responses {
item := &result.Responses[i]
isDir := itemIsDir(item)
// Find name
u, err := rest.URLJoin(baseURL, item.Href)
if err != nil {
fs.Errorf(nil, "URL Join failed for %q and %q: %v", baseURL, item.Href, err)
continue
}
// Make sure directories end with a /
if isDir {
u.Path = addSlash(u.Path)
}
if !strings.HasPrefix(u.Path, baseURL.Path) {
fs.Debugf(nil, "Item with unknown path received: %q, %q", u.Path, baseURL.Path)
continue
}
remote := path.Join(dir, u.Path[len(baseURL.Path):])
if strings.HasSuffix(remote, "/") {
remote = remote[:len(remote)-1]
}
// the listing contains info about itself which we ignore
if remote == dir {
continue
}
// Check OK
if !item.Props.StatusOK() {
fs.Debugf(remote, "Ignoring item with bad status %q", item.Props.Status)
continue
}
if isDir {
if filesOnly {
continue
}
} else {
if directoriesOnly {
continue
}
}
// item.Name = restoreReservedChars(item.Name)
if fn(remote, isDir, &item.Props) {
found = true
break
}
}
return
}
// List the objects and directories in dir into entries. The
// entries can be returned in any order but should be for a
// complete directory.
//
// dir should be "" to list the root, and should not have
// trailing slashes.
//
// This should return ErrDirNotFound if the directory isn't
// found.
func (f *Fs) List(dir string) (entries fs.DirEntries, err error) {
var iErr error
_, err = f.listAll(dir, false, false, func(remote string, isDir bool, info *api.Prop) bool {
if isDir {
d := fs.NewDir(remote, time.Time(info.Modified))
// .SetID(info.ID)
// FIXME more info from dir? can set size, items?
entries = append(entries, d)
} else {
o, err := f.newObjectWithInfo(remote, info)
if err != nil {
iErr = err
return true
}
entries = append(entries, o)
}
return false
})
if err != nil {
return nil, err
}
if iErr != nil {
return nil, iErr
}
return entries, nil
}
// Creates from the parameters passed in a half finished Object which
// must have setMetaData called on it
//
// Used to create new objects
func (f *Fs) createObject(remote string, modTime time.Time, size int64) (o *Object) {
// Temporary Object under construction
o = &Object{
fs: f,
remote: remote,
size: size,
modTime: modTime,
}
return o
}
// 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(in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) (fs.Object, error) {
o := f.createObject(src.Remote(), src.ModTime(), src.Size())
return o, o.Update(in, src, options...)
}
// PutStream uploads to the remote path with the modTime given of indeterminate size
func (f *Fs) PutStream(in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) (fs.Object, error) {
return f.Put(in, src, options...)
}
// mkParentDir makes the parent of the native path dirPath if
// necessary and any directories above that
func (f *Fs) mkParentDir(dirPath string) error {
parent := path.Dir(dirPath)
if parent == "." {
parent = ""
}
return f.mkdir(parent)
}
// mkdir makes the directory and parents using native paths
func (f *Fs) mkdir(dirPath string) error {
// We assume the root is already ceated
if dirPath == "" {
return nil
}
opts := rest.Opts{
Method: "MKCOL",
Path: dirPath,
NoResponse: true,
}
err := f.pacer.Call(func() (bool, error) {
resp, err := f.srv.Call(&opts)
return shouldRetry(resp, err)
})
if apiErr, ok := err.(*api.Error); ok {
// already exists
if apiErr.StatusCode == http.StatusMethodNotAllowed {
return nil
}
// parent does not exists
if apiErr.StatusCode == http.StatusConflict {
err = f.mkParentDir(dirPath)
if err == nil {
err = f.mkdir(dirPath)
}
}
}
return err
}
// Mkdir creates the directory if it doesn't exist
func (f *Fs) Mkdir(dir string) error {
dirPath := f.dirPath(dir)
return f.mkdir(dirPath)
}
// dirNotEmpty returns true if the directory exists and is not Empty
//
// if the directory does not exist then err will be ErrorDirNotFound
func (f *Fs) dirNotEmpty(dir string) (found bool, err error) {
return f.listAll(dir, false, false, func(remote string, isDir bool, info *api.Prop) bool {
return true
})
}
// purgeCheck removes the root directory, if check is set then it
// refuses to do so if it has anything in
func (f *Fs) purgeCheck(dir string, check bool) error {
if check {
notEmpty, err := f.dirNotEmpty(dir)
if err != nil {
return err
}
if notEmpty {
return fs.ErrorDirectoryNotEmpty
}
}
opts := rest.Opts{
Method: "DELETE",
Path: f.dirPath(dir),
NoResponse: true,
}
var resp *http.Response
var err error
err = f.pacer.Call(func() (bool, error) {
resp, err = f.srv.CallXML(&opts, nil, nil)
return shouldRetry(resp, err)
})
if err != nil {
return errors.Wrap(err, "rmdir failed")
}
// FIXME parse Multistatus response
return nil
}
// Rmdir deletes the root folder
//
// Returns an error if it isn't empty
func (f *Fs) Rmdir(dir string) error {
return f.purgeCheck(dir, true)
}
// Precision return the precision of this Fs
func (f *Fs) Precision() time.Duration {
return f.precision
}
// Copy or Move 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/fs.ErrorCantMove
func (f *Fs) copyOrMove(src fs.Object, remote string, method string) (fs.Object, error) {
srcObj, ok := src.(*Object)
if !ok {
fs.Debugf(src, "Can't copy - not same remote type")
if method == "COPY" {
return nil, fs.ErrorCantCopy
}
return nil, fs.ErrorCantMove
}
dstPath := f.filePath(remote)
err := f.mkParentDir(dstPath)
if err != nil {
return nil, errors.Wrap(err, "Copy mkParentDir failed")
}
destinationURL, err := rest.URLJoin(f.endpoint, dstPath)
if err != nil {
return nil, errors.Wrap(err, "copyOrMove couldn't join URL")
}
var resp *http.Response
opts := rest.Opts{
Method: method,
Path: srcObj.filePath(),
NoResponse: true,
ExtraHeaders: map[string]string{
"Destination": destinationURL.String(),
"Overwrite": "F",
},
}
if f.useOCMtime {
opts.ExtraHeaders["X-OC-Mtime"] = fmt.Sprintf("%f", float64(src.ModTime().UnixNano())/1E9)
}
err = f.pacer.Call(func() (bool, error) {
resp, err = f.srv.Call(&opts)
return shouldRetry(resp, err)
})
if err != nil {
return nil, errors.Wrap(err, "Copy call failed")
}
dstObj, err := f.NewObject(remote)
if err != nil {
return nil, errors.Wrap(err, "Copy NewObject failed")
}
return dstObj, nil
}
// Copy src to this remote using server side copy operations.
//
// This is stored with the remote path given
//
// It returns the destination Object and a possible error
//
// Will only be called if src.Fs().Name() == f.Name()
//
// If it isn't possible then return fs.ErrorCantCopy
func (f *Fs) Copy(src fs.Object, remote string) (fs.Object, error) {
return f.copyOrMove(src, remote, "COPY")
}
// 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() error {
return f.purgeCheck("", 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(src fs.Object, remote string) (fs.Object, error) {
return f.copyOrMove(src, remote, "MOVE")
}
// 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(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 := srcFs.filePath(srcRemote)
dstPath := f.filePath(dstRemote)
// Check if destination exists
_, err := f.dirNotEmpty(dstRemote)
if err == nil {
return fs.ErrorDirExists
}
if err != fs.ErrorDirNotFound {
return errors.Wrap(err, "DirMove dirExists dst failed")
}
// Make sure the parent directory exists
err = f.mkParentDir(dstPath)
if err != nil {
return errors.Wrap(err, "DirMove mkParentDir dst failed")
}
destinationURL, err := rest.URLJoin(f.endpoint, dstPath)
if err != nil {
return errors.Wrap(err, "DirMove couldn't join URL")
}
var resp *http.Response
opts := rest.Opts{
Method: "MOVE",
Path: addSlash(srcPath),
NoResponse: true,
ExtraHeaders: map[string]string{
"Destination": addSlash(destinationURL.String()),
"Overwrite": "F",
},
}
err = f.pacer.Call(func() (bool, error) {
resp, err = f.srv.Call(&opts)
return shouldRetry(resp, err)
})
if err != nil {
return errors.Wrap(err, "DirMove MOVE call failed")
}
return nil
}
// Hashes returns the supported hash sets.
func (f *Fs) Hashes() hash.Set {
return hash.Set(hash.HashNone)
}
// ------------------------------------------------------------
// 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
}
// Hash returns the SHA-1 of an object returning a lowercase hex string
func (o *Object) Hash(t hash.Type) (string, error) {
if t != hash.HashSHA1 {
return "", hash.ErrHashUnsupported
}
return o.sha1, nil
}
// Size returns the size of an object in bytes
func (o *Object) Size() int64 {
err := o.readMetaData()
if err != nil {
fs.Logf(o, "Failed to read metadata: %v", err)
return 0
}
return o.size
}
// setMetaData sets the metadata from info
func (o *Object) setMetaData(info *api.Prop) (err error) {
o.hasMetaData = true
o.size = info.Size
o.modTime = time.Time(info.Modified)
return nil
}
// readMetaData gets the metadata if it hasn't already been fetched
//
// it also sets the info
func (o *Object) readMetaData() (err error) {
if o.hasMetaData {
return nil
}
info, err := o.fs.readMetaDataForPath(o.remote)
if err != nil {
return err
}
return o.setMetaData(info)
}
// ModTime returns the modification time of the object
//
// It attempts to read the objects mtime and if that isn't present the
// LastModified returned in the http headers
func (o *Object) ModTime() time.Time {
err := o.readMetaData()
if err != nil {
fs.Logf(o, "Failed to read metadata: %v", err)
return time.Now()
}
return o.modTime
}
// SetModTime sets the modification time of the local fs object
func (o *Object) SetModTime(modTime time.Time) error {
return fs.ErrorCantSetModTime
}
// Storable returns a boolean showing whether this object storable
func (o *Object) Storable() bool {
return true
}
// Open an object for read
func (o *Object) Open(options ...fs.OpenOption) (in io.ReadCloser, err error) {
var resp *http.Response
opts := rest.Opts{
Method: "GET",
Path: o.filePath(),
Options: options,
}
err = o.fs.pacer.Call(func() (bool, error) {
resp, err = o.fs.srv.Call(&opts)
return shouldRetry(resp, err)
})
if err != nil {
return nil, err
}
return resp.Body, err
}
// Update the object with the contents of the io.Reader, modTime and size
//
// If existing is set then it updates the object rather than creating a new one
//
// The new object may have been created if an error is returned
func (o *Object) Update(in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) (err error) {
err = o.fs.mkParentDir(o.filePath())
if err != nil {
return errors.Wrap(err, "Update mkParentDir failed")
}
size := src.Size()
var resp *http.Response
opts := rest.Opts{
Method: "PUT",
Path: o.filePath(),
Body: in,
NoResponse: true,
ContentLength: &size, // FIXME this isn't necessary with owncloud - See https://github.com/nextcloud/nextcloud-snap/issues/365
}
if o.fs.useOCMtime {
opts.ExtraHeaders = map[string]string{
"X-OC-Mtime": fmt.Sprintf("%f", float64(src.ModTime().UnixNano())/1E9),
}
}
err = o.fs.pacer.CallNoRetry(func() (bool, error) {
resp, err = o.fs.srv.Call(&opts)
return shouldRetry(resp, err)
})
if err != nil {
return err
}
// read metadata from remote
o.hasMetaData = false
return o.readMetaData()
}
// Remove an object
func (o *Object) Remove() error {
opts := rest.Opts{
Method: "DELETE",
Path: o.filePath(),
NoResponse: true,
}
return o.fs.pacer.Call(func() (bool, error) {
resp, err := o.fs.srv.Call(&opts)
return shouldRetry(resp, err)
})
}
// Check the interfaces are satisfied
var (
_ fs.Fs = (*Fs)(nil)
_ fs.Purger = (*Fs)(nil)
_ fs.PutStreamer = (*Fs)(nil)
_ fs.Copier = (*Fs)(nil)
_ fs.Mover = (*Fs)(nil)
_ fs.DirMover = (*Fs)(nil)
_ fs.Object = (*Object)(nil)
)