rclone/drive/drive.go

1078 lines
30 KiB
Go

// Package drive interfaces with the Google Drive object storage system
package drive
// FIXME need to deal with some corner cases
// * multiple files with the same name
// * files can be in multiple directories
// * can have directory loops
// * files with / in name
import (
"fmt"
"io"
"log"
"net/http"
"strings"
"time"
"github.com/ncw/rclone/dircache"
"github.com/ncw/rclone/fs"
"github.com/ncw/rclone/oauthutil"
"github.com/ncw/rclone/pacer"
"github.com/pkg/errors"
"github.com/spf13/pflag"
"golang.org/x/oauth2"
"golang.org/x/oauth2/google"
"google.golang.org/api/drive/v2"
"google.golang.org/api/googleapi"
)
// Constants
const (
rcloneClientID = "202264815644.apps.googleusercontent.com"
rcloneEncryptedClientSecret = "eX8GpZTVx3vxMWVkuuBdDWmAUE6rGhTwVrvG9GhllYccSdj2-mvHVg"
driveFolderType = "application/vnd.google-apps.folder"
timeFormatIn = time.RFC3339
timeFormatOut = "2006-01-02T15:04:05.000000000Z07:00"
minSleep = 10 * time.Millisecond
defaultExtensions = "docx,xlsx,pptx,svg"
)
// Globals
var (
// Flags
driveFullList = pflag.BoolP("drive-full-list", "", false, "Use a full listing for directory list. More data but usually quicker. (obsolete)")
driveAuthOwnerOnly = pflag.BoolP("drive-auth-owner-only", "", false, "Only consider files owned by the authenticated user. Requires drive-full-list.")
driveUseTrash = pflag.BoolP("drive-use-trash", "", false, "Send files to the trash instead of deleting permanently.")
driveExtensions = pflag.StringP("drive-formats", "", defaultExtensions, "Comma separated list of preferred formats for downloading Google docs.")
// chunkSize is the size of the chunks created during a resumable upload and should be a power of two.
// 1<<18 is the minimum size supported by the Google uploader, and there is no maximum.
chunkSize = fs.SizeSuffix(8 * 1024 * 1024)
driveUploadCutoff = chunkSize
// Description of how to auth for this app
driveConfig = &oauth2.Config{
Scopes: []string{"https://www.googleapis.com/auth/drive"},
Endpoint: google.Endpoint,
ClientID: rcloneClientID,
ClientSecret: fs.MustReveal(rcloneEncryptedClientSecret),
RedirectURL: oauthutil.TitleBarRedirectURL,
}
mimeTypeToExtension = map[string]string{
"application/epub+zip": "epub",
"application/msword": "doc",
"application/pdf": "pdf",
"application/rtf": "rtf",
"application/vnd.ms-excel": "xls",
"application/vnd.oasis.opendocument.presentation": "odp",
"application/vnd.oasis.opendocument.spreadsheet": "ods",
"application/vnd.oasis.opendocument.text": "odt",
"application/vnd.openxmlformats-officedocument.presentationml.presentation": "pptx",
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet": "xlsx",
"application/vnd.openxmlformats-officedocument.wordprocessingml.document": "docx",
"application/x-vnd.oasis.opendocument.spreadsheet": "ods",
"application/zip": "zip",
"image/jpeg": "jpg",
"image/png": "png",
"image/svg+xml": "svg",
"text/csv": "csv",
"text/html": "html",
"text/plain": "txt",
"text/tab-separated-values": "tsv",
}
extensionToMimeType map[string]string
)
// Register with Fs
func init() {
fs.Register(&fs.RegInfo{
Name: "drive",
Description: "Google Drive",
NewFs: NewFs,
Config: func(name string) {
err := oauthutil.Config("drive", name, driveConfig)
if err != nil {
log.Fatalf("Failed to configure token: %v", err)
}
},
Options: []fs.Option{{
Name: fs.ConfigClientID,
Help: "Google Application Client Id - leave blank normally.",
}, {
Name: fs.ConfigClientSecret,
Help: "Google Application Client Secret - leave blank normally.",
}},
})
pflag.VarP(&driveUploadCutoff, "drive-upload-cutoff", "", "Cutoff for switching to chunked upload")
pflag.VarP(&chunkSize, "drive-chunk-size", "", "Upload chunk size. Must a power of 2 >= 256k.")
// Invert mimeTypeToExtension
extensionToMimeType = make(map[string]string, len(mimeTypeToExtension))
for mimeType, extension := range mimeTypeToExtension {
extensionToMimeType[extension] = mimeType
}
}
// Fs represents a remote drive server
type Fs struct {
name string // name of this remote
svc *drive.Service // the connection to the drive server
root string // the path we are working on
client *http.Client // authorized client
about *drive.About // information about the drive, including the root
dirCache *dircache.DirCache // Map of directory path to directory id
pacer *pacer.Pacer // To pace the API calls
extensions []string // preferred extensions to download docs
}
// Object describes a drive object
type Object struct {
fs *Fs // what this object is part of
remote string // The remote path
id string // Drive Id of this object
url string // Download URL of this object
md5sum string // md5sum of the object
bytes int64 // size of the object
modifiedDate string // RFC3339 time it was last modified
isDocument bool // if set this is a Google doc
mimeType string
}
// ------------------------------------------------------------
// 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("Google drive root '%s'", f.root)
}
// shouldRetry determines whehter a given err rates being retried
func shouldRetry(err error) (again bool, errOut error) {
again = false
if err != nil {
if fs.ShouldRetry(err) {
again = true
} else {
switch gerr := err.(type) {
case *googleapi.Error:
if gerr.Code >= 500 && gerr.Code < 600 {
// All 5xx errors should be retried
again = true
} else if len(gerr.Errors) > 0 {
reason := gerr.Errors[0].Reason
if reason == "rateLimitExceeded" || reason == "userRateLimitExceeded" {
again = true
}
}
}
}
}
return again, err
}
// parseParse parses a drive 'url'
func parseDrivePath(path string) (root string, err error) {
root = strings.Trim(path, "/")
return
}
// User function to process a File item from listAll
//
// Should return true to finish processing
type listAllFn func(*drive.File) 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
//
// Search params: https://developers.google.com/drive/search-parameters
func (f *Fs) listAll(dirID string, title string, directoriesOnly bool, filesOnly bool, fn listAllFn) (found bool, err error) {
query := fmt.Sprintf("trashed=false")
if dirID != "" {
query += fmt.Sprintf(" and '%s' in parents", dirID)
}
if title != "" {
// Escaping the backslash isn't documented but seems to work
title = strings.Replace(title, `\`, `\\`, -1)
title = strings.Replace(title, `'`, `\'`, -1)
query += fmt.Sprintf(" and title='%s'", title)
}
if directoriesOnly {
query += fmt.Sprintf(" and mimeType='%s'", driveFolderType)
}
if filesOnly {
query += fmt.Sprintf(" and mimeType!='%s'", driveFolderType)
}
// fmt.Printf("listAll Query = %q\n", query)
list := f.svc.Files.List().Q(query).MaxResults(1000)
OUTER:
for {
var files *drive.FileList
err = f.pacer.Call(func() (bool, error) {
files, err = list.Do()
return shouldRetry(err)
})
if err != nil {
return false, errors.Wrap(err, "couldn't list directory")
}
for _, item := range files.Items {
if fn(item) {
found = true
break OUTER
}
}
if files.NextPageToken == "" {
break
}
list.PageToken(files.NextPageToken)
}
return
}
// Returns true of x is a power of 2 or zero
func isPowerOfTwo(x int64) bool {
switch {
case x == 0:
return true
case x < 0:
return false
default:
return (x & (x - 1)) == 0
}
}
// parseExtensions parses drive export extensions from a string
func (f *Fs) parseExtensions(extensions string) error {
for _, extension := range strings.Split(extensions, ",") {
extension = strings.ToLower(strings.TrimSpace(extension))
if _, found := extensionToMimeType[extension]; !found {
return errors.Errorf("couldn't find mime type for extension %q", extension)
}
found := false
for _, existingExtension := range f.extensions {
if extension == existingExtension {
found = true
break
}
}
if !found {
f.extensions = append(f.extensions, extension)
}
}
return nil
}
// NewFs contstructs an Fs from the path, container:path
func NewFs(name, path string) (fs.Fs, error) {
if !isPowerOfTwo(int64(chunkSize)) {
return nil, errors.Errorf("drive: chunk size %v isn't a power of two", chunkSize)
}
if chunkSize < 256*1024 {
return nil, errors.Errorf("drive: chunk size can't be less than 256k - was %v", chunkSize)
}
oAuthClient, _, err := oauthutil.NewClient(name, driveConfig)
if err != nil {
log.Fatalf("Failed to configure drive: %v", err)
}
root, err := parseDrivePath(path)
if err != nil {
return nil, err
}
f := &Fs{
name: name,
root: root,
pacer: pacer.New().SetMinSleep(minSleep).SetPacer(pacer.GoogleDrivePacer),
}
// Create a new authorized Drive client.
f.client = oAuthClient
f.svc, err = drive.New(f.client)
if err != nil {
return nil, errors.Wrap(err, "couldn't create Drive client")
}
// Read About so we know the root path
err = f.pacer.Call(func() (bool, error) {
f.about, err = f.svc.About.Get().Do()
return shouldRetry(err)
})
if err != nil {
return nil, errors.Wrap(err, "couldn't read info about Drive")
}
f.dirCache = dircache.New(root, f.about.RootFolderId, f)
// Parse extensions
err = f.parseExtensions(*driveExtensions)
if err != nil {
return nil, err
}
err = f.parseExtensions(defaultExtensions) // make sure there are some sensible ones on there
if err != nil {
return nil, err
}
// Find the current root
err = f.dirCache.FindRoot(false)
if err != nil {
// Assume it is a file
newRoot, remote := dircache.SplitPath(root)
newF := *f
newF.dirCache = dircache.New(newRoot, f.about.RootFolderId, &newF)
newF.root = newRoot
// Make new Fs which is the parent
err = newF.dirCache.FindRoot(false)
if err != nil {
// No root so return old f
return f, nil
}
_, err := newF.newObjectWithInfo(remote, nil)
if err != nil {
// File doesn't exist so return old f
return f, nil
}
// return an error with an fs which points to the parent
return &newF, fs.ErrorIsFile
}
// fmt.Printf("Root id %s", f.dirCache.RootID())
return f, nil
}
// Return an Object from a path
//
// If it can't be found it returns the error fs.ErrorObjectNotFound.
func (f *Fs) newObjectWithInfo(remote string, info *drive.File) (fs.Object, error) {
o := &Object{
fs: f,
remote: remote,
}
if info != nil {
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)
}
// FindLeaf finds a directory of name leaf in the folder with ID pathID
func (f *Fs) FindLeaf(pathID, leaf string) (pathIDOut string, found bool, err error) {
// Find the leaf in pathID
found, err = f.listAll(pathID, leaf, true, false, func(item *drive.File) bool {
if item.Title == leaf {
pathIDOut = item.Id
return true
}
return false
})
return pathIDOut, found, err
}
// CreateDir makes a directory with pathID as parent and name leaf
func (f *Fs) CreateDir(pathID, leaf string) (newID string, err error) {
// fmt.Println("Making", path)
// Define the metadata for the directory we are going to create.
createInfo := &drive.File{
Title: leaf,
Description: leaf,
MimeType: driveFolderType,
Parents: []*drive.ParentReference{{Id: pathID}},
}
var info *drive.File
err = f.pacer.Call(func() (bool, error) {
info, err = f.svc.Files.Insert(createInfo).Do()
return shouldRetry(err)
})
if err != nil {
return "", err
}
return info.Id, nil
}
// isAuthOwned checks if any of the item owners is the authenticated owner
func isAuthOwned(item *drive.File) bool {
for _, owner := range item.Owners {
if owner.IsAuthenticatedUser {
return true
}
}
return false
}
// findExportFormat works out the optimum extension and download URL
// for this item.
//
// Look through the extensions and find the first format that can be
// converted. If none found then return "", ""
func (f *Fs) findExportFormat(filepath string, item *drive.File) (extension, link string) {
// Warn about unknown export formats
for mimeType := range item.ExportLinks {
if _, ok := mimeTypeToExtension[mimeType]; !ok {
fs.Debug(filepath, "Unknown export type %q - ignoring", mimeType)
}
}
// Find the first export format we can
for _, extension := range f.extensions {
mimeType := extensionToMimeType[extension]
if link, ok := item.ExportLinks[mimeType]; ok {
return extension, link
}
}
// else return empty
return "", ""
}
// ListDir reads the directory specified by the job into out, returning any more jobs
func (f *Fs) ListDir(out fs.ListOpts, job dircache.ListDirJob) (jobs []dircache.ListDirJob, err error) {
fs.Debug(f, "Reading %q", job.Path)
_, err = f.listAll(job.DirID, "", false, false, func(item *drive.File) bool {
remote := job.Path + item.Title
switch {
case *driveAuthOwnerOnly && !isAuthOwned(item):
// ignore object or directory
case item.MimeType == driveFolderType:
if out.IncludeDirectory(remote) {
dir := &fs.Dir{
Name: remote,
Bytes: -1,
Count: -1,
}
dir.When, _ = time.Parse(timeFormatIn, item.ModifiedDate)
if out.AddDir(dir) {
return true
}
if job.Depth > 0 {
jobs = append(jobs, dircache.ListDirJob{DirID: item.Id, Path: remote + "/", Depth: job.Depth - 1})
}
}
case item.Md5Checksum != "":
// If item has MD5 sum it is a file stored on drive
o, err := f.newObjectWithInfo(remote, item)
if err != nil {
out.SetError(err)
return true
}
if out.Add(o) {
return true
}
case len(item.ExportLinks) != 0:
// If item has export links then it is a google doc
extension, link := f.findExportFormat(remote, item)
if extension == "" {
fs.Debug(remote, "No export formats found")
} else {
o, err := f.newObjectWithInfo(remote+"."+extension, item)
if err != nil {
out.SetError(err)
return true
}
obj := o.(*Object)
obj.isDocument = true
obj.url = link
obj.bytes = -1
if out.Add(o) {
return true
}
}
default:
fs.Debug(remote, "Ignoring unknown object")
}
return false
})
fs.Debug(f, "Finished reading %q", job.Path)
return jobs, err
}
// List walks the path returning files and directories to out
func (f *Fs) List(out fs.ListOpts, dir string) {
f.dirCache.List(f, out, dir)
}
// Creates a drive.File info from the parameters passed in and a half
// finished Object which must have setMetaData called on it
//
// Used to create new objects
func (f *Fs) createFileInfo(remote string, modTime time.Time, size int64) (*Object, *drive.File, error) {
// Temporary Object under construction
o := &Object{
fs: f,
remote: remote,
bytes: size,
}
leaf, directoryID, err := f.dirCache.FindPath(remote, true)
if err != nil {
return nil, nil, err
}
// Define the metadata for the file we are going to create.
createInfo := &drive.File{
Title: leaf,
Description: leaf,
Parents: []*drive.ParentReference{{Id: directoryID}},
MimeType: fs.MimeTypeFromName(remote),
ModifiedDate: modTime.Format(timeFormatOut),
}
return o, createInfo, 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(in io.Reader, src fs.ObjectInfo) (fs.Object, error) {
exisitingObj, err := f.newObjectWithInfo(src.Remote(), nil)
switch err {
case nil:
return exisitingObj, exisitingObj.Update(in, src)
case fs.ErrorObjectNotFound:
// Not found so create it
return f.PutUnchecked(in, src)
default:
return nil, err
}
}
// 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(in io.Reader, src fs.ObjectInfo) (fs.Object, error) {
remote := src.Remote()
size := src.Size()
modTime := src.ModTime()
o, createInfo, err := f.createFileInfo(remote, modTime, size)
if err != nil {
return nil, err
}
var info *drive.File
if size == 0 || size < int64(driveUploadCutoff) {
// Make the API request to upload metadata and file data.
// Don't retry, return a retry error instead
err = f.pacer.CallNoRetry(func() (bool, error) {
info, err = f.svc.Files.Insert(createInfo).Media(in, googleapi.ContentType("")).Do()
return shouldRetry(err)
})
if err != nil {
return o, err
}
} else {
// Upload the file in chunks
info, err = f.Upload(in, size, createInfo.MimeType, createInfo, remote)
if err != nil {
return o, err
}
}
o.setMetaData(info)
return o, nil
}
// Mkdir creates the container if it doesn't exist
func (f *Fs) Mkdir() error {
return f.dirCache.FindRoot(true)
}
// Rmdir deletes the container
//
// Returns an error if it isn't empty
func (f *Fs) Rmdir() error {
err := f.dirCache.FindRoot(false)
if err != nil {
return err
}
var children *drive.ChildList
err = f.pacer.Call(func() (bool, error) {
children, err = f.svc.Children.List(f.dirCache.RootID()).MaxResults(10).Do()
return shouldRetry(err)
})
if err != nil {
return err
}
if len(children.Items) > 0 {
return errors.Errorf("directory not empty: %#v", children.Items)
}
// Delete the directory if it isn't the root
if f.root != "" {
err = f.pacer.Call(func() (bool, error) {
if *driveUseTrash {
_, err = f.svc.Files.Trash(f.dirCache.RootID()).Do()
} else {
err = f.svc.Files.Delete(f.dirCache.RootID()).Do()
}
return shouldRetry(err)
})
if err != nil {
return err
}
}
f.dirCache.ResetRoot()
return nil
}
// Precision of the object storage system
func (f *Fs) Precision() time.Duration {
return time.Millisecond
}
// 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) {
srcObj, ok := src.(*Object)
if !ok {
fs.Debug(src, "Can't copy - not same remote type")
return nil, fs.ErrorCantCopy
}
if srcObj.isDocument {
return nil, errors.New("can't copy a Google document")
}
o, createInfo, err := f.createFileInfo(remote, srcObj.ModTime(), srcObj.bytes)
if err != nil {
return nil, err
}
var info *drive.File
err = o.fs.pacer.Call(func() (bool, error) {
info, err = o.fs.svc.Files.Copy(srcObj.id, createInfo).Do()
return shouldRetry(err)
})
if err != nil {
return nil, err
}
o.setMetaData(info)
return o, 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() error {
if f.root == "" {
return errors.New("can't purge root directory")
}
err := f.dirCache.FindRoot(false)
if err != nil {
return err
}
err = f.pacer.Call(func() (bool, error) {
if *driveUseTrash {
_, err = f.svc.Files.Trash(f.dirCache.RootID()).Do()
} else {
err = f.svc.Files.Delete(f.dirCache.RootID()).Do()
}
return shouldRetry(err)
})
f.dirCache.ResetRoot()
if err != nil {
return err
}
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(src fs.Object, remote string) (fs.Object, error) {
srcObj, ok := src.(*Object)
if !ok {
fs.Debug(src, "Can't move - not same remote type")
return nil, fs.ErrorCantMove
}
if srcObj.isDocument {
return nil, errors.New("can't move a Google document")
}
// Temporary Object under construction
dstObj, dstInfo, err := f.createFileInfo(remote, srcObj.ModTime(), srcObj.bytes)
if err != nil {
return nil, err
}
// Do the move
var info *drive.File
err = f.pacer.Call(func() (bool, error) {
info, err = f.svc.Files.Patch(srcObj.id, dstInfo).SetModifiedDate(true).Do()
return shouldRetry(err)
})
if err != nil {
return nil, err
}
dstObj.setMetaData(info)
return dstObj, nil
}
// DirMove moves src directory to this remote 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) error {
srcFs, ok := src.(*Fs)
if !ok {
fs.Debug(srcFs, "Can't move directory - not same remote type")
return fs.ErrorCantDirMove
}
// Check if destination exists
f.dirCache.ResetRoot()
err := f.dirCache.FindRoot(false)
if err == nil {
return fs.ErrorDirExists
}
// Find ID of parent
leaf, directoryID, err := f.dirCache.FindPath(f.root, true)
if err != nil {
return err
}
// Do the move
patch := drive.File{
Title: leaf,
Parents: []*drive.ParentReference{{Id: directoryID}},
}
err = f.pacer.Call(func() (bool, error) {
_, err = f.svc.Files.Patch(srcFs.dirCache.RootID(), &patch).Do()
return shouldRetry(err)
})
if err != nil {
return err
}
srcFs.dirCache.ResetRoot()
return nil
}
// Hashes returns the supported hash sets.
func (f *Fs) Hashes() fs.HashSet {
return fs.HashSet(fs.HashMD5)
}
// ------------------------------------------------------------
// 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 Md5sum of an object returning a lowercase hex string
func (o *Object) Hash(t fs.HashType) (string, error) {
if t != fs.HashMD5 {
return "", fs.ErrHashUnsupported
}
return o.md5sum, nil
}
// Size returns the size of an object in bytes
func (o *Object) Size() int64 {
if o.isDocument && o.bytes < 0 {
// If it is a google doc then we must HEAD it to see
// how big it is
_, res, err := o.httpResponse("HEAD", nil)
if err != nil {
fs.ErrorLog(o, "Error reading size: %v", err)
return 0
}
_ = res.Body.Close()
o.bytes = res.ContentLength
// fs.Debug(o, "Read size of document: %v", o.bytes)
}
return o.bytes
}
// setMetaData sets the fs data from a drive.File
func (o *Object) setMetaData(info *drive.File) {
o.id = info.Id
o.url = info.DownloadUrl
o.md5sum = strings.ToLower(info.Md5Checksum)
o.bytes = info.FileSize
o.modifiedDate = info.ModifiedDate
o.mimeType = info.MimeType
}
// readMetaData gets the info if it hasn't already been fetched
func (o *Object) readMetaData() (err error) {
if o.id != "" {
return nil
}
leaf, directoryID, err := o.fs.dirCache.FindPath(o.remote, false)
if err != nil {
if err == fs.ErrorDirNotFound {
return fs.ErrorObjectNotFound
}
return err
}
found, err := o.fs.listAll(directoryID, leaf, false, true, func(item *drive.File) bool {
if item.Title == leaf {
o.setMetaData(item)
return true
}
return false
})
if err != nil {
return err
}
if !found {
return fs.ErrorObjectNotFound
}
return nil
}
// ModTime returns the modification time of the object
//
//
// It attempts to read the objects mtime and if that isn't present the
// LastModified returned in the http headers
func (o *Object) ModTime() time.Time {
err := o.readMetaData()
if err != nil {
fs.Log(o, "Failed to read metadata: %v", err)
return time.Now()
}
modTime, err := time.Parse(timeFormatIn, o.modifiedDate)
if err != nil {
fs.Log(o, "Failed to read mtime from object: %v", err)
return time.Now()
}
return modTime
}
// SetModTime sets the modification time of the drive fs object
func (o *Object) SetModTime(modTime time.Time) error {
err := o.readMetaData()
if err != nil {
return err
}
// New metadata
updateInfo := &drive.File{
ModifiedDate: modTime.Format(timeFormatOut),
}
// Set modified date
var info *drive.File
err = o.fs.pacer.Call(func() (bool, error) {
info, err = o.fs.svc.Files.Update(o.id, updateInfo).SetModifiedDate(true).Do()
return shouldRetry(err)
})
if err != nil {
return err
}
// Update info from read data
o.setMetaData(info)
return nil
}
// Storable returns a boolean as to whether this object is storable
func (o *Object) Storable() bool {
return true
}
// httpResponse gets an http.Response object for the object o.url
// using the method passed in
func (o *Object) httpResponse(method string, options []fs.OpenOption) (req *http.Request, res *http.Response, err error) {
if o.url == "" {
return nil, nil, errors.New("forbidden to download - check sharing permission")
}
req, err = http.NewRequest(method, o.url, nil)
if err != nil {
return req, nil, err
}
fs.OpenOptionAddHTTPHeaders(req.Header, options)
err = o.fs.pacer.Call(func() (bool, error) {
res, err = o.fs.client.Do(req)
return shouldRetry(err)
})
if err != nil {
return req, nil, err
}
return req, res, nil
}
// openFile represents an Object open for reading
type openFile struct {
o *Object // Object we are reading for
in io.ReadCloser // reading from here
bytes int64 // number of bytes read on this connection
eof bool // whether we have read end of file
}
// Read bytes from the object - see io.Reader
func (file *openFile) Read(p []byte) (n int, err error) {
n, err = file.in.Read(p)
file.bytes += int64(n)
if err == io.EOF {
file.eof = true
}
return
}
// Close the object and update bytes read
func (file *openFile) Close() (err error) {
// If end of file, update bytes read
if file.eof {
// fs.Debug(file.o, "Updating size of doc after download to %v", file.bytes)
file.o.bytes = file.bytes
}
return file.in.Close()
}
// Check it satisfies the interfaces
var _ io.ReadCloser = &openFile{}
// Open an object for read
func (o *Object) Open(options ...fs.OpenOption) (in io.ReadCloser, err error) {
req, res, err := o.httpResponse("GET", options)
if err != nil {
return nil, err
}
_, isRanging := req.Header["Range"]
if !(res.StatusCode == http.StatusOK || (isRanging && res.StatusCode == http.StatusPartialContent)) {
_ = res.Body.Close() // ignore error
return nil, errors.Errorf("bad response: %d: %s", res.StatusCode, res.Status)
}
// If it is a document, update the size with what we are
// reading as it can change from the HEAD in the listing to
// this GET. This stops rclone marking the transfer as
// corrupted.
if o.isDocument {
return &openFile{o: o, in: res.Body}, nil
}
return res.Body, 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(in io.Reader, src fs.ObjectInfo) error {
size := src.Size()
modTime := src.ModTime()
if o.isDocument {
return errors.New("can't update a google document")
}
updateInfo := &drive.File{
Id: o.id,
MimeType: fs.MimeType(src),
ModifiedDate: modTime.Format(timeFormatOut),
}
// Make the API request to upload metadata and file data.
var err error
var info *drive.File
if size == 0 || size < int64(driveUploadCutoff) {
// Don't retry, return a retry error instead
err = o.fs.pacer.CallNoRetry(func() (bool, error) {
info, err = o.fs.svc.Files.Update(updateInfo.Id, updateInfo).SetModifiedDate(true).Media(in, googleapi.ContentType("")).Do()
return shouldRetry(err)
})
if err != nil {
return err
}
} else {
// Upload the file in chunks
info, err = o.fs.Upload(in, size, updateInfo.MimeType, updateInfo, o.remote)
if err != nil {
return err
}
}
o.setMetaData(info)
return nil
}
// Remove an object
func (o *Object) Remove() error {
if o.isDocument {
return errors.New("can't delete a google document")
}
var err error
err = o.fs.pacer.Call(func() (bool, error) {
if *driveUseTrash {
_, err = o.fs.svc.Files.Trash(o.id).Do()
} else {
err = o.fs.svc.Files.Delete(o.id).Do()
}
return shouldRetry(err)
})
return err
}
// MimeType of an Object if known, "" otherwise
func (o *Object) MimeType() string {
err := o.readMetaData()
if err != nil {
fs.Log(o, "Failed to read metadata: %v", err)
return ""
}
return o.mimeType
}
// Check the interfaces are satisfied
var (
_ fs.Fs = (*Fs)(nil)
_ fs.Purger = (*Fs)(nil)
_ fs.Copier = (*Fs)(nil)
_ fs.Mover = (*Fs)(nil)
_ fs.DirMover = (*Fs)(nil)
_ fs.PutUncheckeder = (*Fs)(nil)
_ fs.Object = (*Object)(nil)
_ fs.MimeTyper = &Object{}
)