package command import ( "context" "fmt" "github.com/seaweedfs/seaweedfs/weed/filer" "github.com/seaweedfs/seaweedfs/weed/pb" "github.com/seaweedfs/seaweedfs/weed/pb/filer_pb" "github.com/seaweedfs/seaweedfs/weed/wdclient" "google.golang.org/grpc" "net/url" "os" "strings" "github.com/seaweedfs/seaweedfs/weed/security" "github.com/seaweedfs/seaweedfs/weed/util" ) var ( filerCat FilerCatOptions ) type FilerCatOptions struct { grpcDialOption grpc.DialOption filerAddress pb.ServerAddress filerClient filer_pb.SeaweedFilerClient output *string } func (fco *FilerCatOptions) GetLookupFileIdFunction() wdclient.LookupFileIdFunctionType { return func(fileId string) (targetUrls []string, err error) { vid := filer.VolumeId(fileId) resp, err := fco.filerClient.LookupVolume(context.Background(), &filer_pb.LookupVolumeRequest{ VolumeIds: []string{vid}, }) if err != nil { return nil, err } locations := resp.LocationsMap[vid] for _, loc := range locations.Locations { targetUrls = append(targetUrls, fmt.Sprintf("http://%s/%s", loc.Url, fileId)) } return } } func init() { cmdFilerCat.Run = runFilerCat // break init cycle filerCat.output = cmdFilerCat.Flag.String("o", "", "write to file instead of stdout") } var cmdFilerCat = &Command{ UsageLine: "filer.cat [-o ] http://localhost:8888/path/to/file", Short: "copy one file to local", Long: `read one file to stdout or write to a file `, } func runFilerCat(cmd *Command, args []string) bool { util.LoadSecurityConfiguration() if len(args) == 0 { return false } filerSource := args[len(args)-1] filerUrl, err := url.Parse(filerSource) if err != nil { fmt.Printf("The last argument should be a URL on filer: %v\n", err) return false } urlPath := filerUrl.Path if strings.HasSuffix(urlPath, "/") { fmt.Printf("The last argument should be a file: %v\n", err) return false } filerCat.filerAddress = pb.ServerAddress(filerUrl.Host) filerCat.grpcDialOption = security.LoadClientTLS(util.GetViper(), "grpc.client") dir, name := util.FullPath(urlPath).DirAndName() writer := os.Stdout if *filerCat.output != "" { fmt.Printf("saving %s to %s\n", filerSource, *filerCat.output) f, err := os.OpenFile(*filerCat.output, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0755) if err != nil { fmt.Printf("open file %s: %v\n", *filerCat.output, err) return false } defer f.Close() writer = f } pb.WithFilerClient(false, util.RandomInt32(), filerCat.filerAddress, filerCat.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error { request := &filer_pb.LookupDirectoryEntryRequest{ Name: name, Directory: dir, } respLookupEntry, err := filer_pb.LookupEntry(client, request) if err != nil { return err } if len(respLookupEntry.Entry.Content) > 0 { _, err = writer.Write(respLookupEntry.Entry.Content) return err } filerCat.filerClient = client return filer.StreamContent(&filerCat, writer, respLookupEntry.Entry.GetChunks(), 0, int64(filer.FileSize(respLookupEntry.Entry))) }) return true }