seaweedfs/weed/shell/command_fs_meta_cat.go

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package shell
import (
"context"
"fmt"
"io"
"github.com/golang/protobuf/jsonpb"
"github.com/chrislusf/seaweedfs/weed/filer2"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
)
func init() {
Commands = append(Commands, &commandFsMetaCat{})
}
type commandFsMetaCat struct {
}
func (c *commandFsMetaCat) Name() string {
return "fs.meta.cat"
}
func (c *commandFsMetaCat) Help() string {
return `print out the meta data content for a file or directory
fs.meta.cat /dir/
fs.meta.cat /dir/file_name
fs.meta.cat http://<filer_server>:<port>/dir/
fs.meta.cat http://<filer_server>:<port>/dir/file_name
`
}
func (c *commandFsMetaCat) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
input := findInputDirectory(args)
filerServer, filerPort, path, err := commandEnv.parseUrl(input)
if err != nil {
return err
}
ctx := context.Background()
dir, name := filer2.FullPath(path).DirAndName()
return commandEnv.withFilerClient(ctx, filerServer, filerPort, func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.LookupDirectoryEntryRequest{
Name: name,
Directory: dir,
}
respLookupEntry, err := client.LookupDirectoryEntry(ctx, request)
if err != nil {
return err
}
m := jsonpb.Marshaler{
EmitDefaults: true,
Indent: " ",
}
text, marshalErr := m.MarshalToString(respLookupEntry.Entry)
if marshalErr != nil {
return fmt.Errorf("marshal meta: %v", marshalErr)
}
fmt.Fprintf(writer, "%s\n", text)
return nil
})
}