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Find file Copy path
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// Package mega provides an interface to the Mega
// object storage system.
package mega
/*
Open questions
* Does mega support a content hash - what exactly are the mega hashes?
* Can mega support setting modification times?
Improvements:
* Uploads could be done in parallel
* Downloads would be more efficient done in one go
* Uploads would be more efficient with bigger chunks
* Looks like mega can support server side copy, but it isn't implemented in go-mega
* Upload can set modtime... - set as int64_t - can set ctime and mtime?
*/
import (
"context"
"fmt"
"io"
"path"
"strings"
"sync"
"time"
"github.com/pkg/errors"
"github.com/rclone/rclone/fs"
"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/fshttp"
"github.com/rclone/rclone/fs/hash"
"github.com/rclone/rclone/lib/pacer"
"github.com/rclone/rclone/lib/readers"
mega "github.com/t3rm1n4l/go-mega"
)
const (
minSleep = 10 * time.Millisecond
maxSleep = 2 * time.Second
eventWaitTime = 500 * time.Millisecond
decayConstant = 2 // bigger for slower decay, exponential
)
var (
megaCacheMu sync.Mutex // mutex for the below
megaCache = map[string]*mega.Mega{} // cache logged in Mega's by user
)
// Register with Fs
func init() {
fs.Register(&fs.RegInfo{
Name: "mega",
Description: "Mega",
NewFs: NewFs,
Options: []fs.Option{{
Name: "user",
Help: "User name",
Required: true,
}, {
Name: "pass",
Help: "Password.",
Required: true,
IsPassword: true,
}, {
Name: "debug",
Help: `Output more debug from Mega.
If this flag is set (along with -vv) it will print further debugging
information from the mega backend.`,
Default: false,
Advanced: true,
}, {
Name: "hard_delete",
Help: `Delete files permanently rather than putting them into the trash.
Normally the mega backend will put all deletions into the trash rather
than permanently deleting them. If you specify this then rclone will
permanently delete objects instead.`,
Default: false,
Advanced: true,
}},
})
}
// Options defines the configuration for this backend
type Options struct {
User string `config:"user"`
Pass string `config:"pass"`
Debug bool `config:"debug"`
HardDelete bool `config:"hard_delete"`
}
// Fs represents a remote mega
type Fs struct {
name string // name of this remote
root string // the path we are working on
opt Options // parsed config options
features *fs.Features // optional features
srv *mega.Mega // the connection to the server
pacer *fs.Pacer // pacer for API calls
rootNodeMu sync.Mutex // mutex for _rootNode
_rootNode *mega.Node // root node - call findRoot to use this
mkdirMu sync.Mutex // used to serialize calls to mkdir / rmdir
}
// Object describes a mega object
//
// Will definitely have info but maybe not meta
//
// Normally rclone would just store an ID here but go-mega and mega.nz
// expect you to build an entire tree of all the objects in memory.
// In this case we just store a pointer to the object.
type Object struct {
fs *Fs // what this object is part of
remote string // The remote path
info *mega.Node // pointer to the mega node
}
// ------------------------------------------------------------
// 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("mega root '%s'", f.root)
}
// Features returns the optional features of this Fs
func (f *Fs) Features() *fs.Features {
return f.features
}
// parsePath parses an mega 'url'
func parsePath(path string) (root string) {
root = strings.Trim(path, "/")
return
}
// shouldRetry returns a boolean as to whether this err deserves to be
// retried. It returns the err as a convenience
func shouldRetry(err error) (bool, error) {
// Let the mega library handle the low level retries
return false, err
/*
switch errors.Cause(err) {
case mega.EAGAIN, mega.ERATELIMIT, mega.ETEMPUNAVAIL:
return true, err
}
return fserrors.ShouldRetry(err), err
*/
}
// readMetaDataForPath reads the metadata from the path
func (f *Fs) readMetaDataForPath(remote string) (info *mega.Node, err error) {
rootNode, err := f.findRoot(false)
if err != nil {
return nil, err
}
return f.findObject(rootNode, remote)
}
// NewFs constructs an Fs from the path, container:path
func NewFs(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
}
if opt.Pass != "" {
var err error
opt.Pass, err = obscure.Reveal(opt.Pass)
if err != nil {
return nil, errors.Wrap(err, "couldn't decrypt password")
}
}
// cache *mega.Mega on username so we can re-use and share
// them between remotes. They are expensive to make as they
// contain all the objects and sharing the objects makes the
// move code easier as we don't have to worry about mixing
// them up between different remotes.
megaCacheMu.Lock()
defer megaCacheMu.Unlock()
srv := megaCache[opt.User]
if srv == nil {
srv = mega.New().SetClient(fshttp.NewClient(fs.Config))
srv.SetRetries(fs.Config.LowLevelRetries) // let mega do the low level retries
srv.SetLogger(func(format string, v ...interface{}) {
fs.Infof("*go-mega*", format, v...)
})
if opt.Debug {
srv.SetDebugger(func(format string, v ...interface{}) {
fs.Debugf("*go-mega*", format, v...)
})
}
err := srv.Login(opt.User, opt.Pass)
if err != nil {
return nil, errors.Wrap(err, "couldn't login")
}
megaCache[opt.User] = srv
}
root = parsePath(root)
f := &Fs{
name: name,
root: root,
opt: *opt,
srv: srv,
pacer: fs.NewPacer(pacer.NewDefault(pacer.MinSleep(minSleep), pacer.MaxSleep(maxSleep), pacer.DecayConstant(decayConstant))),
}
f.features = (&fs.Features{
DuplicateFiles: true,
CanHaveEmptyDirectories: true,
}).Fill(f)
// Find the root node and check if it is a file or not
_, err = f.findRoot(false)
switch err {
case nil:
// root node found and is a directory
case fs.ErrorDirNotFound:
// root node not found, so can't be a file
case fs.ErrorIsFile:
// root node is a file so point to parent directory
root = path.Dir(root)
if root == "." {
root = ""
}
f.root = root
return f, err
}
return f, nil
}
// splitNodePath splits nodePath into / separated parts, returning nil if it
// should refer to the root
func splitNodePath(nodePath string) (parts []string) {
nodePath = path.Clean(nodePath)
parts = strings.Split(nodePath, "/")
if len(parts) == 1 && (parts[0] == "." || parts[0] == "/") {
return nil
}
return parts
}
// findNode looks up the node for the path of the name given from the root given
//
// It returns mega.ENOENT if it wasn't found
func (f *Fs) findNode(rootNode *mega.Node, nodePath string) (*mega.Node, error) {
parts := splitNodePath(nodePath)
if parts == nil {
return rootNode, nil
}
nodes, err := f.srv.FS.PathLookup(rootNode, parts)
if err != nil {
return nil, err
}
return nodes[len(nodes)-1], nil
}
// findDir finds the directory rooted from the node passed in
func (f *Fs) findDir(rootNode *mega.Node, dir string) (node *mega.Node, err error) {
node, err = f.findNode(rootNode, dir)
if err == mega.ENOENT {
return nil, fs.ErrorDirNotFound
} else if err == nil && node.GetType() == mega.FILE {
return nil, fs.ErrorIsFile
}
return node, err
}
// findObject looks up the node for the object of the name given
func (f *Fs) findObject(rootNode *mega.Node, file string) (node *mega.Node, err error) {
node, err = f.findNode(rootNode, file)
if err == mega.ENOENT {
return nil, fs.ErrorObjectNotFound
} else if err == nil && node.GetType() != mega.FILE {
return nil, fs.ErrorNotAFile
}
return node, err
}
// lookupDir looks up the node for the directory of the name given
//
// if create is true it tries to create the root directory if not found
func (f *Fs) lookupDir(dir string) (*mega.Node, error) {
rootNode, err := f.findRoot(false)
if err != nil {
return nil, err
}
return f.findDir(rootNode, dir)
}
// lookupParentDir finds the parent node for the remote passed in
func (f *Fs) lookupParentDir(remote string) (dirNode *mega.Node, leaf string, err error) {
parent, leaf := path.Split(remote)
dirNode, err = f.lookupDir(parent)
return dirNode, leaf, err
}
// mkdir makes the directory and any parent directories for the
// directory of the name given
func (f *Fs) mkdir(rootNode *mega.Node, dir string) (node *mega.Node, err error) {
f.mkdirMu.Lock()
defer f.mkdirMu.Unlock()
parts := splitNodePath(dir)
if parts == nil {
return rootNode, nil
}
var i int
// look up until we find a directory which exists
for i = 0; i <= len(parts); i++ {
var nodes []*mega.Node
nodes, err = f.srv.FS.PathLookup(rootNode, parts[:len(parts)-i])
if err == nil {
if len(nodes) == 0 {
node = rootNode
} else {
node = nodes[len(nodes)-1]
}
break
}
if err != mega.ENOENT {
return nil, errors.Wrap(err, "mkdir lookup failed")
}
}
if err != nil {
return nil, errors.Wrap(err, "internal error: mkdir called with non existent root node")
}
// i is number of directories to create (may be 0)
// node is directory to create them from
for _, name := range parts[len(parts)-i:] {
// create directory called name in node
err = f.pacer.Call(func() (bool, error) {
node, err = f.srv.CreateDir(name, node)
return shouldRetry(err)
})
if err != nil {
return nil, errors.Wrap(err, "mkdir create node failed")
}
}
return node, nil
}
// mkdirParent creates the parent directory of remote
func (f *Fs) mkdirParent(remote string) (dirNode *mega.Node, leaf string, err error) {
rootNode, err := f.findRoot(true)
if err != nil {
return nil, "", err
}
parent, leaf := path.Split(remote)
dirNode, err = f.mkdir(rootNode, parent)
return dirNode, leaf, err
}
// findRoot looks up the root directory node and returns it.
//
// if create is true it tries to create the root directory if not found
func (f *Fs) findRoot(create bool) (*mega.Node, error) {
f.rootNodeMu.Lock()
defer f.rootNodeMu.Unlock()
// Check if we haven't found it already
if f._rootNode != nil {
return f._rootNode, nil
}
// Check for pre-existing root
absRoot := f.srv.FS.GetRoot()
node, err := f.findDir(absRoot, f.root)
//log.Printf("findRoot findDir %p %v", node, err)
if err == nil {
f._rootNode = node
return node, nil
}
if !create || err != fs.ErrorDirNotFound {
return nil, err
}
//..not found so create the root directory
f._rootNode, err = f.mkdir(absRoot, f.root)
return f._rootNode, err
}
// clearRoot unsets the root directory
func (f *Fs) clearRoot() {
f.rootNodeMu.Lock()
f._rootNode = nil
f.rootNodeMu.Unlock()
//log.Printf("cleared root directory")
}
// CleanUp deletes all files currently in trash
func (f *Fs) CleanUp(ctx context.Context) (err error) {
trash := f.srv.FS.GetTrash()
items := []*mega.Node{}
_, err = f.list(ctx, trash, func(item *mega.Node) bool {
items = append(items, item)
return false
})
if err != nil {
return errors.Wrap(err, "CleanUp failed to list items in trash")
}
fs.Infof(f, "Deleting %d items from the trash", len(items))
errors := 0
// similar to f.deleteNode(trash) but with HardDelete as true
for _, item := range items {
fs.Debugf(f, "Deleting trash %q", item.GetName())
deleteErr := f.pacer.Call(func() (bool, error) {
err := f.srv.Delete(item, true)
return shouldRetry(err)
})
if deleteErr != nil {
err = deleteErr
errors++
}
}
fs.Infof(f, "Deleted %d items from the trash with %d errors", len(items), errors)
return err
}
// 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 *mega.Node) (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(ctx context.Context, 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 listFn func(*mega.Node) 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) list(ctx context.Context, dir *mega.Node, fn listFn) (found bool, err error) {
nodes, err := f.srv.FS.GetChildren(dir)
if err != nil {
return false, errors.Wrapf(err, "list failed")
}
for _, item := range nodes {
if fn(item) {
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(ctx context.Context, dir string) (entries fs.DirEntries, err error) {
dirNode, err := f.lookupDir(dir)
if err != nil {
return nil, err
}
var iErr error
_, err = f.list(ctx, dirNode, func(info *mega.Node) bool {
remote := path.Join(dir, info.GetName())
switch info.GetType() {
case mega.FOLDER, mega.ROOT, mega.INBOX, mega.TRASH:
d := fs.NewDir(remote, info.GetTimeStamp()).SetID(info.GetHash())
entries = append(entries, d)
case mega.FILE:
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
//
// Returns the dirNode, object, leaf and error
//
// Used to create new objects
func (f *Fs) createObject(remote string, modTime time.Time, size int64) (o *Object, dirNode *mega.Node, leaf string, err error) {
dirNode, leaf, err = f.mkdirParent(remote)
if err != nil {
return nil, nil, leaf, err
}
// Temporary Object under construction
o = &Object{
fs: f,
remote: remote,
}
return o, dirNode, leaf, 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
// PutUnchecked uploads the object
//
// This will create a duplicate if we upload a new file without
// checking to see if there is one already - use Put() for that.
func (f *Fs) Put(ctx context.Context, in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) (fs.Object, error) {
existingObj, err := f.newObjectWithInfo(src.Remote(), nil)
switch err {
case nil:
return existingObj, existingObj.Update(ctx, in, src, options...)
case fs.ErrorObjectNotFound:
// Not found so create it
return f.PutUnchecked(ctx, in, src)
default:
return nil, err
}
}
// PutUnchecked 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
// PutUnchecked uploads the object
//
// This will create a duplicate if we upload a new file without
// checking to see if there is one already - use Put() for that.
func (f *Fs) PutUnchecked(ctx context.Context, in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) (fs.Object, error) {
remote := src.Remote()
size := src.Size()
modTime := src.ModTime(ctx)
o, _, _, err := f.createObject(remote, modTime, size)
if err != nil {
return nil, err
}
return o, o.Update(ctx, in, src, options...)
}
// Mkdir creates the directory if it doesn't exist
func (f *Fs) Mkdir(ctx context.Context, dir string) error {
rootNode, err := f.findRoot(true)
if err != nil {
return err
}
_, err = f.mkdir(rootNode, dir)
return errors.Wrap(err, "Mkdir failed")
}
// deleteNode removes a file or directory, observing useTrash
func (f *Fs) deleteNode(node *mega.Node) (err error) {
err = f.pacer.Call(func() (bool, error) {
err = f.srv.Delete(node, f.opt.HardDelete)
return shouldRetry(err)
})
return err
}
// purgeCheck removes the directory dir, if check is set then it
// refuses to do so if it has anything in
func (f *Fs) purgeCheck(dir string, check bool) error {
f.mkdirMu.Lock()
defer f.mkdirMu.Unlock()
rootNode, err := f.findRoot(false)
if err != nil {
return err
}
dirNode, err := f.findDir(rootNode, dir)
if err != nil {
return err
}
if check {
children, err := f.srv.FS.GetChildren(dirNode)
if err != nil {
return errors.Wrap(err, "purgeCheck GetChildren failed")
}
if len(children) > 0 {
return fs.ErrorDirectoryNotEmpty
}
}
waitEvent := f.srv.WaitEventsStart()
err = f.deleteNode(dirNode)
if err != nil {
return errors.Wrap(err, "delete directory node failed")
}
// Remove the root node if we just deleted it
if dirNode == rootNode {
f.clearRoot()
}
f.srv.WaitEvents(waitEvent, eventWaitTime)
return nil
}
// Rmdir deletes the root folder
//
// Returns an error if it isn't empty
func (f *Fs) Rmdir(ctx context.Context, dir string) error {
return f.purgeCheck(dir, true)
}
// Precision return the precision of this Fs
func (f *Fs) Precision() time.Duration {
return fs.ModTimeNotSupported
}
// 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) error {
return f.purgeCheck("", false)
}
// move a file or folder (srcFs, srcRemote, info) to (f, dstRemote)
//
// info will be updates
func (f *Fs) move(dstRemote string, srcFs *Fs, srcRemote string, info *mega.Node) (err error) {
var (
dstFs = f
srcDirNode, dstDirNode *mega.Node
srcParent, dstParent string
srcLeaf, dstLeaf string
)
if dstRemote != "" {
// lookup or create the destination parent directory
dstDirNode, dstLeaf, err = dstFs.mkdirParent(dstRemote)
} else {
// find or create the parent of the root directory
absRoot := dstFs.srv.FS.GetRoot()
dstParent, dstLeaf = path.Split(dstFs.root)
dstDirNode, err = dstFs.mkdir(absRoot, dstParent)
}
if err != nil {
return errors.Wrap(err, "server side move failed to make dst parent dir")
}
if srcRemote != "" {
// lookup the existing parent directory
srcDirNode, srcLeaf, err = srcFs.lookupParentDir(srcRemote)
} else {
// lookup the existing root parent
absRoot := srcFs.srv.FS.GetRoot()
srcParent, srcLeaf = path.Split(srcFs.root)
srcDirNode, err = f.findDir(absRoot, srcParent)
}
if err != nil {
return errors.Wrap(err, "server side move failed to lookup src parent dir")
}
// move the object into its new directory if required
if srcDirNode != dstDirNode && srcDirNode.GetHash() != dstDirNode.GetHash() {
//log.Printf("move src %p %q dst %p %q", srcDirNode, srcDirNode.GetName(), dstDirNode, dstDirNode.GetName())
err = f.pacer.Call(func() (bool, error) {
err = f.srv.Move(info, dstDirNode)
return shouldRetry(err)
})
if err != nil {
return errors.Wrap(err, "server side move failed")
}
}
waitEvent := f.srv.WaitEventsStart()
// rename the object if required
if srcLeaf != dstLeaf {
//log.Printf("rename %q to %q", srcLeaf, dstLeaf)
err = f.pacer.Call(func() (bool, error) {
err = f.srv.Rename(info, dstLeaf)
return shouldRetry(err)
})
if err != nil {
return errors.Wrap(err, "server side rename failed")
}
}
f.srv.WaitEvents(waitEvent, eventWaitTime)
return nil
}
// 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) {
dstFs := f
//log.Printf("Move %q -> %q", src.Remote(), remote)
srcObj, ok := src.(*Object)
if !ok {
fs.Debugf(src, "Can't move - not same remote type")
return nil, fs.ErrorCantMove
}
// Do the move
err := f.move(remote, srcObj.fs, srcObj.remote, srcObj.info)
if err != nil {
return nil, err
}
// Create a destination object
dstObj := &Object{
fs: dstFs,
remote: remote,
info: srcObj.info,
}
return dstObj, nil
}
// 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 {
dstFs := f
srcFs, ok := src.(*Fs)
if !ok {
fs.Debugf(srcFs, "Can't move directory - not same remote type")
return fs.ErrorCantDirMove
}
// find the source
info, err := srcFs.lookupDir(srcRemote)
if err != nil {
return err
}
// check the destination doesn't exist
_, err = dstFs.lookupDir(dstRemote)
if err == nil {
return fs.ErrorDirExists
} else if err != fs.ErrorDirNotFound {
return errors.Wrap(err, "DirMove error while checking dest directory")
}
// Do the move
err = f.move(dstRemote, srcFs, srcRemote, info)
if err != nil {
return err
}
// Clear src if it was the root
if srcRemote == "" {
srcFs.clearRoot()
}
return nil
}
// DirCacheFlush an optional interface to flush internal directory cache
func (f *Fs) DirCacheFlush() {
// f.dirCache.ResetRoot()
// FIXME Flush the mega somehow?
}
// Hashes returns the supported hash sets.
func (f *Fs) Hashes() hash.Set {
return hash.Set(hash.None)
}
// PublicLink generates a public link to the remote path (usually readable by anyone)
func (f *Fs) PublicLink(ctx context.Context, remote string) (link string, err error) {
root, err := f.findRoot(false)
if err != nil {
return "", errors.Wrap(err, "PublicLink failed to find root node")
}
node, err := f.findNode(root, remote)
if err != nil {
return "", errors.Wrap(err, "PublicLink failed to find path")
}
link, err = f.srv.Link(node, true)
if err != nil {
return "", errors.Wrap(err, "PublicLink failed to create link")
}
return link, nil
}
// MergeDirs merges the contents of all the directories passed
// in into the first one and rmdirs the other directories.
func (f *Fs) MergeDirs(ctx context.Context, dirs []fs.Directory) error {
if len(dirs) < 2 {
return nil
}
// find dst directory
dstDir := dirs[0]
dstDirNode := f.srv.FS.HashLookup(dstDir.ID())
if dstDirNode == nil {
return errors.Errorf("MergeDirs failed to find node for: %v", dstDir)
}
for _, srcDir := range dirs[1:] {
// find src directory
srcDirNode := f.srv.FS.HashLookup(srcDir.ID())
if srcDirNode == nil {
return errors.Errorf("MergeDirs failed to find node for: %v", srcDir)
}
// list the the objects
infos := []*mega.Node{}
_, err := f.list(ctx, srcDirNode, func(info *mega.Node) bool {
infos = append(infos, info)
return false
})
if err != nil {
return errors.Wrapf(err, "MergeDirs list failed on %v", srcDir)
}
// move them into place
for _, info := range infos {
fs.Infof(srcDir, "merging %q", info.GetName())
err = f.pacer.Call(func() (bool, error) {
err = f.srv.Move(info, dstDirNode)
return shouldRetry(err)
})
if err != nil {
return errors.Wrapf(err, "MergeDirs move failed on %q in %v", info.GetName(), srcDir)
}
}
// rmdir (into trash) the now empty source directory
fs.Infof(srcDir, "removing empty directory")
err = f.deleteNode(srcDirNode)
if err != nil {
return errors.Wrapf(err, "MergeDirs move failed to rmdir %q", srcDir)
}
}
return nil
}
// About gets quota information
func (f *Fs) About(ctx context.Context) (*fs.Usage, error) {
var q mega.QuotaResp
var err error
err = f.pacer.Call(func() (bool, error) {
q, err = f.srv.GetQuota()
return shouldRetry(err)
})
if err != nil {
return nil, errors.Wrap(err, "failed to get Mega Quota")
}
usage := &fs.Usage{
Total: fs.NewUsageValue(int64(q.Mstrg)), // quota of bytes that can be used
Used: fs.NewUsageValue(int64(q.Cstrg)), // bytes in use
Free: fs.NewUsageValue(int64(q.Mstrg - q.Cstrg)), // bytes which can be uploaded before reaching the quota
}
return usage, 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
}
// Hash returns the hashes of an object
func (o *Object) Hash(ctx context.Context, t hash.Type) (string, error) {
return "", hash.ErrUnsupported
}
// Size returns the size of an object in bytes
func (o *Object) Size() int64 {
return o.info.GetSize()
}
// setMetaData sets the metadata from info
func (o *Object) setMetaData(info *mega.Node) (err error) {
if info.GetType() != mega.FILE {
return fs.ErrorNotAFile
}
o.info = info
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.info != nil {
return nil
}
info, err := o.fs.readMetaDataForPath(o.remote)
if err != nil {
if err == fs.ErrorDirNotFound {
err = fs.ErrorObjectNotFound
}
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(ctx context.Context) time.Time {
return o.info.GetTimeStamp()
}
// SetModTime sets the modification time of the local fs object
func (o *Object) SetModTime(ctx context.Context, modTime time.Time) error {
return fs.ErrorCantSetModTime
}
// Storable returns a boolean showing whether this object storable
func (o *Object) Storable() bool {
return true
}
// openObject represents a download in progress
type openObject struct {
mu sync.Mutex
o *Object
d *mega.Download
id int
skip int64
chunk []byte
closed bool
}
// get the next chunk
func (oo *openObject) getChunk() (err error) {
if oo.id >= oo.d.Chunks() {
return io.EOF
}
var chunk []byte
err = oo.o.fs.pacer.Call(func() (bool, error) {
chunk, err = oo.d.DownloadChunk(oo.id)
return shouldRetry(err)
})
if err != nil {
return err
}
oo.id++
oo.chunk = chunk
return nil
}
// Read reads up to len(p) bytes into p.
func (oo *openObject) Read(p []byte) (n int, err error) {
oo.mu.Lock()
defer oo.mu.Unlock()
if oo.closed {
return 0, errors.New("read on closed file")
}
// Skip data at the start if requested
for oo.skip > 0 {
_, size, err := oo.d.ChunkLocation(oo.id)
if err != nil {
return 0, err
}
if oo.skip < int64(size) {
break
}
oo.id++
oo.skip -= int64(size)
}
if len(oo.chunk) == 0 {
err = oo.getChunk()
if err != nil {
return 0, err
}
if oo.skip > 0 {
oo.chunk = oo.chunk[oo.skip:]
oo.skip = 0
}
}
n = copy(p, oo.chunk)
oo.chunk = oo.chunk[n:]
return n, nil
}
// Close closed the file - MAC errors are reported here
func (oo *openObject) Close() (err error) {
oo.mu.Lock()
defer oo.mu.Unlock()
if oo.closed {
return nil
}
err = oo.o.fs.pacer.Call(func() (bool, error) {
err = oo.d.Finish()
return shouldRetry(err)
})
if err != nil {
return errors.Wrap(err, "failed to finish download")
}
oo.closed = true
return nil
}
// Open an object for read
func (o *Object) Open(ctx context.Context, options ...fs.OpenOption) (in io.ReadCloser, err error) {
var offset, limit int64 = 0, -1
for _, option := range options {
switch x := option.(type) {
case *fs.SeekOption:
offset = x.Offset
case *fs.RangeOption:
offset, limit = x.Decode(o.Size())
default:
if option.Mandatory() {
fs.Logf(o, "Unsupported mandatory option: %v", option)
}
}
}
var d *mega.Download
err = o.fs.pacer.Call(func() (bool, error) {
d, err = o.fs.srv.NewDownload(o.info)
return shouldRetry(err)
})
if err != nil {
return nil, errors.Wrap(err, "open download file failed")
}
oo := &openObject{
o: o,
d: d,
skip: offset,
}
return readers.NewLimitedReadCloser(oo, limit), nil
}
// 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(ctx context.Context, in io.Reader, src fs.ObjectInfo, options ...fs.OpenOption) (err error) {
size := src.Size()
if size < 0 {
return errors.New("mega backend can't upload a file of unknown length")
}
//modTime := src.ModTime(ctx)
remote := o.Remote()
// Create the parent directory
dirNode, leaf, err := o.fs.mkdirParent(remote)
if err != nil {
return errors.Wrap(err, "update make parent dir failed")
}
var u *mega.Upload
err = o.fs.pacer.Call(func() (bool, error) {
u, err = o.fs.srv.NewUpload(dirNode, leaf, size)
return shouldRetry(err)
})
if err != nil {
return errors.Wrap(err, "upload file failed to create session")
}
// Upload the chunks
// FIXME do this in parallel
for id := 0; id < u.Chunks(); id++ {
_, chunkSize, err := u.ChunkLocation(id)
if err != nil {
return errors.Wrap(err, "upload failed to read chunk location")
}
chunk := make([]byte, chunkSize)
_, err = io.ReadFull(in, chunk)
if err != nil {
return errors.Wrap(err, "upload failed to read data")
}
err = o.fs.pacer.Call(func() (bool, error) {
err = u.UploadChunk(id, chunk)
return shouldRetry(err)
})
if err != nil {
return errors.Wrap(err, "upload file failed to upload chunk")
}
}
// Finish the upload
var info *mega.Node
err = o.fs.pacer.Call(func() (bool, error) {
info, err = u.Finish()
return shouldRetry(err)
})
if err != nil {
return errors.Wrap(err, "failed to finish upload")
}
// If the upload succeeded and the original object existed, then delete it
if o.info != nil {
err = o.fs.deleteNode(o.info)
if err != nil {
return errors.Wrap(err, "upload failed to remove old version")
}
o.info = nil
}
return o.setMetaData(info)
}
// Remove an object
func (o *Object) Remove(ctx context.Context) error {
err := o.fs.deleteNode(o.info)
if err != nil {
return errors.Wrap(err, "Remove object failed")
}
return nil
}
// ID returns the ID of the Object if known, or "" if not
func (o *Object) ID() string {
return o.info.GetHash()
}
// Check the interfaces are satisfied
var (
_ fs.Fs = (*Fs)(nil)
_ fs.Purger = (*Fs)(nil)
_ fs.Mover = (*Fs)(nil)
_ fs.PutUncheckeder = (*Fs)(nil)
_ fs.DirMover = (*Fs)(nil)
_ fs.DirCacheFlusher = (*Fs)(nil)
_ fs.PublicLinker = (*Fs)(nil)
_ fs.MergeDirser = (*Fs)(nil)
_ fs.Abouter = (*Fs)(nil)
_ fs.Object = (*Object)(nil)
_ fs.IDer = (*Object)(nil)
)
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