GOLANG：从Google云端硬盘中排除垃圾文件

Question

type listAllFilesArgs struct {
    query     string
    fields    []googleapi.Field
    sortOrder string
    maxFiles  int64
}
type Field string

func (self *Drive) listAllFiles(args listAllFilesArgs) ([]*drive.File, error) {
    var files []*drive.File
    var pageSize int64
    if args.maxFiles > 0 && args.maxFiles < 1000 {
        pageSize = args.maxFiles
    } else {
        pageSize = 1000
    }
    controlledStop := fmt.Errorf("Controlled stop")
    err := self.service.Files.List().Q(args.query).Fields(args.fields...).OrderBy(args.sortOrder).PageSize(pageSize).Pages(context.TODO(), func(fl *drive.FileList) error {
        files = append(files, fl.Files...)

        // Stop when we have all the files we need
        if args.maxFiles > 0 && len(files) >= int(args.maxFiles) {
            return controlledStop
        }

        return nil
    })

    if err != nil && err != controlledStop {
        return nil, err
    }

    if args.maxFiles > 0 {
        n := min(len(files), int(args.maxFiles))
        return files[:n], nil
    }

    return files, nil
}

func (self *Drive) newPathfinder() *remotePathfinder {
    return &remotePathfinder{
        service: self.service.Files,
        files:   make(map[string]*drive.File),
    }
}

i am using go for my googledrive api development following wre the details of version usage, go version go1.8.1 windows/amd64 and imported "google.golang.org/api/drive/v3" "google.golang.org/api/googleapi" for development

err = gDrive.List(listArgs)
    if err != nil {
        fmt.Errorf("Failed to list files: %s", err)
    }

func (self *Drive) List(args ListFilesArgs) (err error) {
    listArgs := listAllFilesArgs{
        query:     args.Query,
        fields:    []googleapi.Field{"nextPageToken", "files(id,name,md5Checksum,mimeType,size,createdTime,parents)"},
        sortOrder: args.SortOrder,
        maxFiles:  args.MaxFiles,
    }
    files, err := self.listAllFiles(listArgs)
    if err != nil {
        return fmt.Errorf("Failed to list files: %s /n", err)
    }

    pathfinder := self.newPathfinder()

    if args.AbsPath {
        // Replace name with absolute path
        for _, f := range files {
            f.Name, err = pathfinder.absPath(f)
            if err != nil {
                return err
            }
        }
    }

    PrintFileList(PrintFileListArgs{
        Out:         args.Out,
        Files:       files,
        NameWidth:   int(args.NameWidth),
        SkipHeader:  args.SkipHeader,
        SizeInBytes: args.SizeInBytes,
    })

    return
}

google drive api for Golang listing files including trash. How to exclude trash files,

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Answer 1

To filter files that you want to retrieve from google drive, you need to specify search parameters as described in "Search for Files". Pass it as the argument of Q(...), for example

Suppose you want to search for pdf file with a name containing myfile and not in trashed.

then the code will look like

err := self.service.Files.List().
   Q("mimeType='application/pdf' and name contains 'myfile' and trashed=false")