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