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fix: GetIPNSRecord example gateway implementation #158

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merged 1 commit into from
Feb 10, 2023
Merged

fix: GetIPNSRecord example gateway implementation #158

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20 changes: 17 additions & 3 deletions examples/gateway/common/blocks.go
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,9 @@ import (
"github.com/ipld/go-ipld-prime"
"github.com/ipld/go-ipld-prime/node/basicnode"
"github.com/ipld/go-ipld-prime/schema"
"github.com/libp2p/go-libp2p/core/peer"
"github.com/libp2p/go-libp2p/core/routing"
mc "github.com/multiformats/go-multicodec"
)

func NewBlocksHandler(gw *BlocksGateway, port int) http.Handler {
Expand Down Expand Up @@ -138,11 +140,23 @@ func (api *BlocksGateway) GetBlock(ctx context.Context, c cid.Cid) (blocks.Block
}

func (api *BlocksGateway) GetIPNSRecord(ctx context.Context, c cid.Cid) ([]byte, error) {
if api.routing != nil {
return api.routing.GetValue(ctx, "/ipns/"+c.String())
if api.routing == nil {
return nil, routing.ErrNotSupported
}

return nil, routing.ErrNotSupported
// Fails fast if the CID is not an encoded Libp2p Key, avoids wasteful
// round trips to the remote routing provider.
if mc.Code(c.Type()) != mc.Libp2pKey {
return nil, errors.New("provided cid is not an encoded libp2p key")
}

// The value store expects the key itself to be encoded as a multihash.
id, err := peer.FromCid(c)
if err != nil {
return nil, err
}

return api.routing.GetValue(ctx, "/ipns/"+string(id))
}

func (api *BlocksGateway) GetDNSLinkRecord(ctx context.Context, hostname string) (ifacepath.Path, error) {
Expand Down
2 changes: 1 addition & 1 deletion examples/go.mod
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@ require (
github.com/ipld/go-codec-dagpb v1.5.0
github.com/ipld/go-ipld-prime v0.19.0
github.com/libp2p/go-libp2p v0.25.1
github.com/multiformats/go-multicodec v0.7.0
github.com/prometheus/client_golang v1.14.0
github.com/stretchr/testify v1.8.1
)
Expand Down Expand Up @@ -80,7 +81,6 @@ require (
github.com/multiformats/go-multiaddr v0.8.0 // indirect
github.com/multiformats/go-multiaddr-dns v0.3.1 // indirect
github.com/multiformats/go-multibase v0.1.1 // indirect
github.com/multiformats/go-multicodec v0.7.0 // indirect
github.com/multiformats/go-multihash v0.2.1 // indirect
github.com/multiformats/go-multistream v0.4.1 // indirect
github.com/multiformats/go-varint v0.0.7 // indirect
Expand Down