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waiting for working link system (ipld/go-ipld-prime#143) to test sha1 (currently link system doesn't do the hashing)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| package ipldgit | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "compress/zlib" | ||
| "errors" | ||
| "io" | ||
|
|
||
| blocks "github.com/ipfs/go-block-format" | ||
| "github.com/ipfs/go-cid" | ||
| "github.com/ipld/go-ipld-prime" | ||
| mh "github.com/multiformats/go-multihash" | ||
| ) | ||
|
|
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| // DecodeBlock attempts to parse a serialized ipfs block into an ipld node dag | ||
| func DecodeBlock(block blocks.Block) (ipld.Node, error) { | ||
| prefix := block.Cid().Prefix() | ||
|
|
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| if prefix.Codec != cid.GitRaw || prefix.MhType != mh.SHA1 || prefix.MhLength != mh.DefaultLengths[mh.SHA1] { | ||
| return nil, errors.New("invalid CID prefix") | ||
| } | ||
|
|
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| return ParseObjectFromBuffer(block.RawData()) | ||
| } | ||
|
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| // ParseCompressedObject works like ParseObject, but with a surrounding zlib compression. | ||
| func ParseCompressedObject(r io.Reader) (ipld.Node, error) { | ||
| rc, err := zlib.NewReader(r) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer rc.Close() | ||
|
|
||
| return ParseObject(rc) | ||
| } | ||
|
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| // ParseObjectFromBuffer is like ParseObject, but with a fully in-memory stream | ||
| func ParseObjectFromBuffer(b []byte) (ipld.Node, error) { | ||
| return ParseObject(bytes.NewReader(b)) | ||
| } |
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