seaweedfs/weed/shell/command_fs_cat.go

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2019-04-21 22:43:43 +00:00
package shell
import (
"context"
"fmt"
"io"
"math"
"github.com/chrislusf/seaweedfs/weed/filer2"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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weed_server "github.com/chrislusf/seaweedfs/weed/server"
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)
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/
fs.cat /dir/file_name
fs.cat /dir/file_prefix
fs.cat http://<filer_server>:<port>/dir/
fs.cat http://<filer_server>:<port>/dir/file_name
fs.cat http://<filer_server>:<port>/dir/file_prefix
`
}
func (c *commandFsCat) 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()
if commandEnv.isDirectory(ctx, filerServer, filerPort, path) {
return fmt.Errorf("%s is a directory", path)
}
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
}
return weed_server.StreamContent(commandEnv.masterClient, writer, respLookupEntry.Entry.Chunks, 0, math.MaxInt32)
})
}