343 lines
9.3 KiB
Go
343 lines
9.3 KiB
Go
package operations
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import (
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"context"
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"errors"
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"fmt"
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"path"
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"strings"
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"time"
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"github.com/rclone/rclone/backend/crypt"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/fs/hash"
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"github.com/rclone/rclone/fs/walk"
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)
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// ListJSONItem in the struct which gets marshalled for each line
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type ListJSONItem struct {
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Path string
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Name string
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EncryptedPath string `json:",omitempty"`
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Encrypted string `json:",omitempty"`
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Size int64
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MimeType string `json:",omitempty"`
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ModTime Timestamp //`json:",omitempty"`
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IsDir bool
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Hashes map[string]string `json:",omitempty"`
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ID string `json:",omitempty"`
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OrigID string `json:",omitempty"`
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Tier string `json:",omitempty"`
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IsBucket bool `json:",omitempty"`
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Metadata fs.Metadata `json:",omitempty"`
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}
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// Timestamp a time in the provided format
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type Timestamp struct {
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When time.Time
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Format string
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}
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// MarshalJSON turns a Timestamp into JSON
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func (t Timestamp) MarshalJSON() (out []byte, err error) {
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if t.When.IsZero() {
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return []byte(`""`), nil
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}
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return []byte(`"` + t.When.Format(t.Format) + `"`), nil
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}
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// Returns a time format for the given precision
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func formatForPrecision(precision time.Duration) string {
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switch {
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case precision <= time.Nanosecond:
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return "2006-01-02T15:04:05.000000000Z07:00"
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case precision <= 10*time.Nanosecond:
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return "2006-01-02T15:04:05.00000000Z07:00"
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case precision <= 100*time.Nanosecond:
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return "2006-01-02T15:04:05.0000000Z07:00"
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case precision <= time.Microsecond:
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return "2006-01-02T15:04:05.000000Z07:00"
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case precision <= 10*time.Microsecond:
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return "2006-01-02T15:04:05.00000Z07:00"
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case precision <= 100*time.Microsecond:
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return "2006-01-02T15:04:05.0000Z07:00"
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case precision <= time.Millisecond:
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return "2006-01-02T15:04:05.000Z07:00"
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case precision <= 10*time.Millisecond:
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return "2006-01-02T15:04:05.00Z07:00"
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case precision <= 100*time.Millisecond:
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return "2006-01-02T15:04:05.0Z07:00"
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}
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return time.RFC3339
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}
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// ListJSONOpt describes the options for ListJSON
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type ListJSONOpt struct {
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Recurse bool `json:"recurse"`
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NoModTime bool `json:"noModTime"`
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NoMimeType bool `json:"noMimeType"`
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ShowEncrypted bool `json:"showEncrypted"`
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ShowOrigIDs bool `json:"showOrigIDs"`
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ShowHash bool `json:"showHash"`
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DirsOnly bool `json:"dirsOnly"`
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FilesOnly bool `json:"filesOnly"`
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Metadata bool `json:"metadata"`
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HashTypes []string `json:"hashTypes"` // hash types to show if ShowHash is set, e.g. "MD5", "SHA-1"
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}
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// state for ListJson
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type listJSON struct {
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fsrc fs.Fs
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remote string
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format string
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opt *ListJSONOpt
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cipher *crypt.Cipher
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hashTypes []hash.Type
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dirs bool
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files bool
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canGetTier bool
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isBucket bool
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showHash bool
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}
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func newListJSON(ctx context.Context, fsrc fs.Fs, remote string, opt *ListJSONOpt) (*listJSON, error) {
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lj := &listJSON{
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fsrc: fsrc,
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remote: remote,
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opt: opt,
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dirs: true,
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files: true,
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}
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// Dirs Files
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// !FilesOnly,!DirsOnly true true
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// !FilesOnly,DirsOnly true false
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// FilesOnly,!DirsOnly false true
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// FilesOnly,DirsOnly true true
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if !opt.FilesOnly && opt.DirsOnly {
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lj.files = false
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} else if opt.FilesOnly && !opt.DirsOnly {
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lj.dirs = false
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}
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if opt.ShowEncrypted {
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fsInfo, _, _, config, err := fs.ConfigFs(fsrc.Name() + ":" + fsrc.Root())
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if err != nil {
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return nil, fmt.Errorf("ListJSON failed to load config for crypt remote: %w", err)
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}
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if fsInfo.Name != "crypt" {
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return nil, errors.New("the remote needs to be of type \"crypt\"")
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}
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lj.cipher, err = crypt.NewCipher(config)
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if err != nil {
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return nil, fmt.Errorf("ListJSON failed to make new crypt remote: %w", err)
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}
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}
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features := fsrc.Features()
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lj.canGetTier = features.GetTier
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lj.format = formatForPrecision(fsrc.Precision())
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lj.isBucket = features.BucketBased && remote == "" && fsrc.Root() == "" // if bucket-based remote listing the root mark directories as buckets
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lj.showHash = opt.ShowHash
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lj.hashTypes = fsrc.Hashes().Array()
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if len(opt.HashTypes) != 0 {
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lj.showHash = true
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lj.hashTypes = []hash.Type{}
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for _, hashType := range opt.HashTypes {
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var ht hash.Type
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err := ht.Set(hashType)
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if err != nil {
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return nil, err
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}
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lj.hashTypes = append(lj.hashTypes, ht)
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}
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}
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return lj, nil
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}
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// Convert a single entry to JSON
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//
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// It may return nil if there is no entry to return
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func (lj *listJSON) entry(ctx context.Context, entry fs.DirEntry) (*ListJSONItem, error) {
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switch entry.(type) {
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case fs.Directory:
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if lj.opt.FilesOnly {
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return nil, nil
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}
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case fs.Object:
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if lj.opt.DirsOnly {
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return nil, nil
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}
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default:
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fs.Errorf(nil, "Unknown type %T in listing", entry)
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}
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item := &ListJSONItem{
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Path: entry.Remote(),
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Name: path.Base(entry.Remote()),
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Size: entry.Size(),
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}
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if entry.Remote() == "" {
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item.Name = ""
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}
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if !lj.opt.NoModTime {
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item.ModTime = Timestamp{When: entry.ModTime(ctx), Format: lj.format}
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}
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if !lj.opt.NoMimeType {
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item.MimeType = fs.MimeTypeDirEntry(ctx, entry)
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}
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if lj.cipher != nil {
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switch entry.(type) {
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case fs.Directory:
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item.EncryptedPath = lj.cipher.EncryptDirName(entry.Remote())
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case fs.Object:
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item.EncryptedPath = lj.cipher.EncryptFileName(entry.Remote())
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default:
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fs.Errorf(nil, "Unknown type %T in listing", entry)
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}
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item.Encrypted = path.Base(item.EncryptedPath)
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}
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if do, ok := entry.(fs.IDer); ok {
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item.ID = do.ID()
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}
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if o, ok := entry.(fs.Object); lj.opt.ShowOrigIDs && ok {
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if do, ok := fs.UnWrapObject(o).(fs.IDer); ok {
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item.OrigID = do.ID()
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}
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}
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switch x := entry.(type) {
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case fs.Directory:
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item.IsDir = true
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item.IsBucket = lj.isBucket
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case fs.Object:
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item.IsDir = false
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if lj.showHash {
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item.Hashes = make(map[string]string)
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for _, hashType := range lj.hashTypes {
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hash, err := x.Hash(ctx, hashType)
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if err != nil {
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fs.Errorf(x, "Failed to read hash: %v", err)
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} else if hash != "" {
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item.Hashes[hashType.String()] = hash
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}
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}
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}
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if lj.canGetTier {
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if do, ok := x.(fs.GetTierer); ok {
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item.Tier = do.GetTier()
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}
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}
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if lj.opt.Metadata {
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metadata, err := fs.GetMetadata(ctx, x)
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if err != nil {
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fs.Errorf(x, "Failed to read metadata: %v", err)
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} else if metadata != nil {
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item.Metadata = metadata
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}
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}
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default:
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fs.Errorf(nil, "Unknown type %T in listing in ListJSON", entry)
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}
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return item, nil
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}
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// ListJSON lists fsrc using the options in opt calling callback for each item
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func ListJSON(ctx context.Context, fsrc fs.Fs, remote string, opt *ListJSONOpt, callback func(*ListJSONItem) error) error {
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lj, err := newListJSON(ctx, fsrc, remote, opt)
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if err != nil {
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return err
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}
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err = walk.ListR(ctx, fsrc, remote, false, ConfigMaxDepth(ctx, lj.opt.Recurse), walk.ListAll, func(entries fs.DirEntries) (err error) {
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for _, entry := range entries {
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item, err := lj.entry(ctx, entry)
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if err != nil {
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return fmt.Errorf("creating entry failed in ListJSON: %w", err)
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}
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if item != nil {
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err = callback(item)
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if err != nil {
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return fmt.Errorf("callback failed in ListJSON: %w", err)
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}
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}
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}
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return nil
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})
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if err != nil {
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return fmt.Errorf("error in ListJSON: %w", err)
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}
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return nil
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}
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// StatJSON returns a single JSON stat entry for the fsrc, remote path
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//
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// The item returned may be nil if it is not found or excluded with DirsOnly/FilesOnly
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func StatJSON(ctx context.Context, fsrc fs.Fs, remote string, opt *ListJSONOpt) (item *ListJSONItem, err error) {
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// FIXME this could me more efficient we had a new primitive
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// NewDirEntry() which returned an Object or a Directory
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lj, err := newListJSON(ctx, fsrc, remote, opt)
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if err != nil {
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return nil, err
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}
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// Root is always a directory. When we have a NewDirEntry
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// primitive we need to call it, but for now this will do.
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if remote == "" {
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if !lj.dirs {
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return nil, nil
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}
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// Check the root directory exists
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_, err := fsrc.List(ctx, "")
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if err != nil {
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return nil, err
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}
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return lj.entry(ctx, fs.NewDir("", time.Now()))
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}
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// Could be a file or a directory here
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if lj.files {
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// NewObject can return the sentinel errors ErrorObjectNotFound or ErrorIsDir
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// ErrorObjectNotFound can mean the source is a directory or not found
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obj, err := fsrc.NewObject(ctx, remote)
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if err == fs.ErrorObjectNotFound {
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if !lj.dirs {
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return nil, nil
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}
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} else if err == fs.ErrorIsDir {
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if !lj.dirs {
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return nil, nil
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}
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// This could return a made up ListJSONItem here
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// but that wouldn't have the IDs etc in
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} else if err != nil {
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if !lj.dirs {
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return nil, err
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}
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} else {
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return lj.entry(ctx, obj)
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}
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}
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// Must be a directory here
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parent := path.Dir(remote)
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if parent == "." || parent == "/" {
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parent = ""
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}
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entries, err := fsrc.List(ctx, parent)
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if err == fs.ErrorDirNotFound {
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return nil, nil
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} else if err != nil {
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return nil, err
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}
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equal := func(a, b string) bool { return a == b }
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if fsrc.Features().CaseInsensitive {
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equal = strings.EqualFold
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}
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var foundEntry fs.DirEntry
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for _, entry := range entries {
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if equal(entry.Remote(), remote) {
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foundEntry = entry
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break
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}
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}
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if foundEntry == nil {
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return nil, nil
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}
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return lj.entry(ctx, foundEntry)
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}
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