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container: add readme, remove extra formats, remove go-ipld-cbor dependency

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This commit is contained in:
Michael Muré
2024-10-07 18:46:19 +02:00
parent 60922ced96
commit 40639b6715
13 changed files with 191 additions and 167 deletions
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63
pkg/container/reader.go
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@@ -1,14 +1,11 @@
package container
import (
"compress/flate"
"compress/gzip"
"encoding/base64"
"fmt"
"io"
"github.com/ipfs/go-cid"
cbor "github.com/ipfs/go-ipld-cbor"
"github.com/ipld/go-ipld-prime"
"github.com/ipld/go-ipld-prime/codec/dagcbor"
"github.com/ipld/go-ipld-prime/datamodel"
@@ -20,8 +17,11 @@ import (
var ErrNotFound = fmt.Errorf("not found")
// Reader is a token container reader. It exposes the tokens conveniently decoded.
type Reader map[cid.Cid]token.Token
// GetToken returns an arbitrary decoded token, from its CID.
// If not found, ErrNotFound is returned.
func (ctn Reader) GetToken(cid cid.Cid) (token.Token, error) {
tkn, ok := ctn[cid]
if !ok {
@@ -30,6 +30,7 @@ func (ctn Reader) GetToken(cid cid.Cid) (token.Token, error) {
return tkn, nil
}
// GetDelegation is the same as GetToken but only return a delegation.Token, with the right type.
func (ctn Reader) GetDelegation(cid cid.Cid) (*delegation.Token, error) {
tkn, err := ctn.GetToken(cid)
if err != nil {
@@ -41,6 +42,8 @@ func (ctn Reader) GetDelegation(cid cid.Cid) (*delegation.Token, error) {
return nil, fmt.Errorf("not a delegation token")
}
// GetInvocation returns the first found invocation.Token.
// If none are found, ErrNotFound is returned.
func (ctn Reader) GetInvocation() (*invocation.Token, error) {
for _, t := range ctn {
if inv, ok := t.(*invocation.Token); ok {
@@ -76,38 +79,7 @@ func FromCarBase64(r io.Reader) (Reader, error) {
return FromCar(base64.NewDecoder(base64.StdEncoding, r))
}
func FromCarGzip(r io.Reader) (Reader, error) {
r2, err := gzip.NewReader(r)
if err != nil {
return nil, err
}
defer r2.Close()
return FromCar(r2)
}
func FromCarGzipBase64(r io.Reader) (Reader, error) {
return FromCarGzip(base64.NewDecoder(base64.StdEncoding, r))
}
func FromCbor(r io.Reader) (Reader, error) {
var raw [][]byte
err := cbor.DecodeReader(r, &raw)
if err != nil {
return nil, err
}
ctn := make(Reader, len(raw))
for _, data := range raw {
err = ctn.addToken(data)
if err != nil {
return nil, err
}
}
return ctn, nil
}
func FromCbor2(r io.Reader) (Reader, error) {
n, err := ipld.DecodeStreaming(r, dagcbor.Decode)
if err != nil {
return nil, err
@@ -140,29 +112,6 @@ func FromCborBase64(r io.Reader) (Reader, error) {
return FromCbor(base64.NewDecoder(base64.StdEncoding, r))
}
func FromCborGzip(r io.Reader) (Reader, error) {
r2, err := gzip.NewReader(r)
if err != nil {
return nil, err
}
defer r2.Close()
return FromCbor(r2)
}
func FromCborGzipBase64(r io.Reader) (Reader, error) {
return FromCborGzip(base64.NewDecoder(base64.StdEncoding, r))
}
func FromCborFlate(r io.Reader) (Reader, error) {
r2 := flate.NewReader(r)
defer r2.Close()
return FromCbor(r2)
}
func FromCborFlateBase64(r io.Reader) (Reader, error) {
return FromCborFlate(base64.NewDecoder(base64.StdEncoding, r))
}
func (ctn Reader) addToken(data []byte) error {
tkn, c, err := token.FromSealed(data)
if err != nil {