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package shell
import (
"context"
"fmt"
"io"
"github.com/seaweedfs/seaweedfs/weed/filer"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/seaweedfs/weed/util"
)
func init() {
Commands = append(Commands, &commandFsCat{})
}
type commandFsCat struct {
}
func (c *commandFsCat) Name() string {
return "fs.cat"
}
func (c *commandFsCat) Help() string {
return `stream the file content on to the screen
fs.cat /dir/file_name
`
}
func (c *commandFsCat) HasTag(CommandTag) bool {
return false
}
func (c *commandFsCat) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
if handleHelpRequest(c, args, writer) {
return nil
}
path, err := commandEnv.parseUrl(findInputDirectory(args))
if err != nil {
return err
}
if commandEnv.isDirectory(path) {
return fmt.Errorf("%s is a directory", path)
}
dir, name := util.FullPath(path).DirAndName()
return commandEnv.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.LookupDirectoryEntryRequest{
Name: name,
Directory: dir,
}
respLookupEntry, err := filer_pb.LookupEntry(context.Background(), client, request)
if err != nil {
return err
}
if len(respLookupEntry.Entry.Content) > 0 {
_, err = writer.Write(respLookupEntry.Entry.Content)
return err
}
return filer.StreamContent(commandEnv.MasterClient, writer, respLookupEntry.Entry.GetChunks(), 0, int64(filer.FileSize(respLookupEntry.Entry)))
})
}
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