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Original file line number | Diff line number | Diff line change |
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package commands | ||
|
||
import ( | ||
"bytes" | ||
"fmt" | ||
"io" | ||
"strings" | ||
|
||
cmds "github.com/bittorrent/go-btfs-cmds" | ||
cmdenv "github.com/bittorrent/go-btfs/core/commands/cmdenv" | ||
mbase "github.com/multiformats/go-multibase" | ||
) | ||
|
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var MbaseCmd = &cmds.Command{ | ||
Helptext: cmds.HelpText{ | ||
Tagline: "Encode and decode files or stdin with multibase format", | ||
}, | ||
Subcommands: map[string]*cmds.Command{ | ||
"encode": mbaseEncodeCmd, | ||
"decode": mbaseDecodeCmd, | ||
"transcode": mbaseTranscodeCmd, | ||
"list": basesCmd, | ||
}, | ||
Extra: CreateCmdExtras(SetDoesNotUseRepo(true)), | ||
} | ||
|
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const ( | ||
mbaseOptionName = "b" | ||
) | ||
|
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var mbaseEncodeCmd = &cmds.Command{ | ||
Helptext: cmds.HelpText{ | ||
Tagline: "Encode data into multibase string", | ||
LongDescription: ` | ||
This command expects a file name or data provided via stdin. | ||
By default it will use URL-safe base64url encoding, | ||
but one can customize used base with -b: | ||
> echo hello | btfs multibase encode -b base16 > output_file | ||
> cat output_file | ||
f68656c6c6f0a | ||
> echo hello > input_file | ||
> btfs multibase encode -b base16 input_file | ||
f68656c6c6f0a | ||
`, | ||
}, | ||
Arguments: []cmds.Argument{ | ||
cmds.FileArg("file", true, false, "data to encode").EnableStdin(), | ||
}, | ||
Options: []cmds.Option{ | ||
cmds.StringOption(mbaseOptionName, "multibase encoding").WithDefault("base64url"), | ||
}, | ||
Run: func(req *cmds.Request, resp cmds.ResponseEmitter, env cmds.Environment) error { | ||
if err := req.ParseBodyArgs(); err != nil { | ||
return err | ||
} | ||
encoderName, _ := req.Options[mbaseOptionName].(string) | ||
encoder, err := mbase.EncoderByName(encoderName) | ||
if err != nil { | ||
return err | ||
} | ||
files := req.Files.Entries() | ||
file, err := cmdenv.GetFileArg(files) | ||
if err != nil { | ||
return fmt.Errorf("failed to access file: %w", err) | ||
} | ||
buf, err := io.ReadAll(file) | ||
if err != nil { | ||
return fmt.Errorf("failed to read file contents: %w", err) | ||
} | ||
encoded := encoder.Encode(buf) | ||
reader := strings.NewReader(encoded) | ||
return resp.Emit(reader) | ||
}, | ||
} | ||
|
||
var mbaseDecodeCmd = &cmds.Command{ | ||
Helptext: cmds.HelpText{ | ||
Tagline: "Decode multibase string", | ||
LongDescription: ` | ||
This command expects multibase inside of a file or via stdin: | ||
> echo -n hello | btfs multibase encode -b base16 > file | ||
> cat file | ||
f68656c6c6f | ||
> btfs multibase decode file | ||
hello | ||
> cat file | btfs multibase decode | ||
hello | ||
`, | ||
}, | ||
Arguments: []cmds.Argument{ | ||
cmds.FileArg("encoded_file", true, false, "encoded data to decode").EnableStdin(), | ||
}, | ||
Run: func(req *cmds.Request, resp cmds.ResponseEmitter, env cmds.Environment) error { | ||
if err := req.ParseBodyArgs(); err != nil { | ||
return err | ||
} | ||
files := req.Files.Entries() | ||
file, err := cmdenv.GetFileArg(files) | ||
if err != nil { | ||
return fmt.Errorf("failed to access file: %w", err) | ||
} | ||
encodedData, err := io.ReadAll(file) | ||
if err != nil { | ||
return fmt.Errorf("failed to read file contents: %w", err) | ||
} | ||
_, data, err := mbase.Decode(string(encodedData)) | ||
if err != nil { | ||
return fmt.Errorf("failed to decode multibase: %w", err) | ||
} | ||
reader := bytes.NewReader(data) | ||
return resp.Emit(reader) | ||
}, | ||
} | ||
|
||
var mbaseTranscodeCmd = &cmds.Command{ | ||
Helptext: cmds.HelpText{ | ||
Tagline: "Transcode multibase string between bases", | ||
LongDescription: ` | ||
This command expects multibase inside of a file or via stdin. | ||
By default it will use URL-safe base64url encoding, | ||
but one can customize used base with -b: | ||
> echo -n hello | btfs multibase encode > file | ||
> cat file | ||
uaGVsbG8 | ||
> btfs multibase transcode file -b base16 > transcoded_file | ||
> cat transcoded_file | ||
f68656c6c6f | ||
`, | ||
}, | ||
Arguments: []cmds.Argument{ | ||
cmds.FileArg("encoded_file", true, false, "encoded data to decode").EnableStdin(), | ||
}, | ||
Options: []cmds.Option{ | ||
cmds.StringOption(mbaseOptionName, "multibase encoding").WithDefault("base64url"), | ||
}, | ||
Run: func(req *cmds.Request, resp cmds.ResponseEmitter, env cmds.Environment) error { | ||
if err := req.ParseBodyArgs(); err != nil { | ||
return err | ||
} | ||
encoderName, _ := req.Options[mbaseOptionName].(string) | ||
encoder, err := mbase.EncoderByName(encoderName) | ||
if err != nil { | ||
return err | ||
} | ||
files := req.Files.Entries() | ||
file, err := cmdenv.GetFileArg(files) | ||
if err != nil { | ||
return fmt.Errorf("failed to access file: %w", err) | ||
} | ||
encodedData, err := io.ReadAll(file) | ||
if err != nil { | ||
return fmt.Errorf("failed to read file contents: %w", err) | ||
} | ||
_, data, err := mbase.Decode(string(encodedData)) | ||
if err != nil { | ||
return fmt.Errorf("failed to decode multibase: %w", err) | ||
} | ||
encoded := encoder.Encode(data) | ||
reader := strings.NewReader(encoded) | ||
return resp.Emit(reader) | ||
}, | ||
} |
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