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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "log" | ||
| "strconv" | ||
|
|
||
| "github.com/kballard/go-shellquote" | ||
| "github.com/urfave/cli/v2" | ||
| "github.com/usnistgov/ndn-dpdk/ndn" | ||
| "github.com/usnistgov/ndn-dpdk/ndn/endpoint" | ||
| "github.com/usnistgov/ndn-dpdk/ndn/rdr" | ||
| "github.com/usnistgov/ndn-dpdk/ndn/rdr/ndn6file" | ||
| "github.com/usnistgov/ndn-dpdk/ndn/segmented" | ||
| ) | ||
|
|
||
| func retrieveFileMetadata(ctx context.Context, name string, fetchOptions segmented.FetchOptions) (m ndn6file.Metadata, e error) { | ||
| e = rdr.RetrieveMetadata(ctx, &m, ndn.ParseName(name), endpoint.ConsumerOptions{ | ||
| Retx: endpoint.RetxOptions{Limit: fetchOptions.RetxLimit}, | ||
| }) | ||
| if e != nil { | ||
| return | ||
| } | ||
| log.Printf("retrieved metadata %s", m.Name) | ||
| return | ||
| } | ||
|
|
||
| func init() { | ||
| var name string | ||
| var fetchOptions segmented.FetchOptions | ||
| defineCommand(&cli.Command{ | ||
| Name: "ls", | ||
| Usage: "List directory on file server.", | ||
| Flags: defineFetchOptionsFlags(&fetchOptions, []cli.Flag{ | ||
| &cli.StringFlag{ | ||
| Name: "name", | ||
| Usage: "name", | ||
| Destination: &name, | ||
| Required: true, | ||
| }, | ||
| }), | ||
| Before: openUplink, | ||
| Action: func(c *cli.Context) error { | ||
| m, e := retrieveFileMetadata(c.Context, name, fetchOptions) | ||
| if e != nil { | ||
| return e | ||
| } | ||
| if !m.IsDir() { | ||
| return fmt.Errorf("mode %o is not a directory", m.Mode) | ||
| } | ||
|
|
||
| fetcher := segmented.Fetch(m.Name, fetchOptions) | ||
| payload, e := fetcher.Payload(c.Context) | ||
| if e != nil { | ||
| return e | ||
| } | ||
|
|
||
| var ls ndn6file.DirectoryListing | ||
| if e = ls.UnmarshalBinary(payload); e != nil { | ||
| return e | ||
| } | ||
|
|
||
| log.Printf("retrieved %d entries in directory listing", len(ls)) | ||
| fmt.Println(ls) | ||
| return nil | ||
| }, | ||
| }) | ||
| } | ||
|
|
||
| func init() { | ||
| var name, filename string | ||
| var fetchOptions segmented.FetchOptions | ||
| var useTgFetcher bool | ||
| defineCommand(&cli.Command{ | ||
| Name: "fetch", | ||
| Usage: "Fetch file from file server.", | ||
| Flags: defineFetchOptionsFlags(&fetchOptions, []cli.Flag{ | ||
| &cli.StringFlag{ | ||
| Name: "name", | ||
| Usage: "name", | ||
| Destination: &name, | ||
| Required: true, | ||
| }, | ||
| &cli.StringFlag{ | ||
| Name: "filename", | ||
| Usage: "output file name", | ||
| DefaultText: "write to stdout", | ||
| Destination: &filename, | ||
| }, | ||
| &cli.BoolFlag{ | ||
| Name: "tg-fetcher", | ||
| Usage: "generate arguments for 'ndndpdk-ctrl start-fetch' command to fetch with NDN-DPDK service", | ||
| Destination: &useTgFetcher, | ||
| }, | ||
| }), | ||
| Before: openUplink, | ||
| Action: func(c *cli.Context) error { | ||
| m, e := retrieveFileMetadata(c.Context, name, fetchOptions) | ||
| if e != nil { | ||
| return e | ||
| } | ||
| if !m.IsFile() { | ||
| return fmt.Errorf("mode %o is not a file", m.Mode) | ||
| } | ||
| log.Printf("file has %d octets in %d segments of size %d", m.Size, m.SegmentEnd(), m.SegmentSize) | ||
| if useTgFetcher { | ||
| fmt.Println(shellquote.Join( | ||
| "--name", m.Name.String(), | ||
| "--segment-end", strconv.FormatUint(m.SegmentEnd(), 10), | ||
| "--segment-len", strconv.Itoa(m.SegmentSize), | ||
| )) | ||
| return nil | ||
| } | ||
| return retrieveSegmented(c.Context, m.Name, filename, m.SegmentSize, fetchOptions) | ||
| }, | ||
| }) | ||
| } |
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