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headers.go
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headers.go
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// Copyright 2020 The Swarm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package libp2p
import (
"context"
"fmt"
"github.com/ethersphere/bee/v2/pkg/p2p"
"github.com/ethersphere/bee/v2/pkg/p2p/libp2p/internal/headers/pb"
"github.com/ethersphere/bee/v2/pkg/p2p/protobuf"
"github.com/ethersphere/bee/v2/pkg/swarm"
)
func sendHeaders(ctx context.Context, headers p2p.Headers, stream *stream) error {
w, r := protobuf.NewWriterAndReader(stream)
if err := w.WriteMsgWithContext(ctx, headersP2PToPB(headers)); err != nil {
return fmt.Errorf("write message: %w", err)
}
h := new(pb.Headers)
if err := r.ReadMsgWithContext(ctx, h); err != nil {
return fmt.Errorf("read message: %w", err)
}
stream.headers = headersPBToP2P(h)
return nil
}
func handleHeaders(ctx context.Context, headler p2p.HeadlerFunc, stream *stream, peerAddress swarm.Address) error {
w, r := protobuf.NewWriterAndReader(stream)
headers := new(pb.Headers)
if err := r.ReadMsgWithContext(ctx, headers); err != nil {
return fmt.Errorf("read message: %w", err)
}
stream.headers = headersPBToP2P(headers)
var h p2p.Headers
if headler != nil {
h = headler(stream.headers, peerAddress)
}
stream.responseHeaders = h
if err := w.WriteMsgWithContext(ctx, headersP2PToPB(h)); err != nil {
return fmt.Errorf("write message: %w", err)
}
return nil
}
func headersPBToP2P(h *pb.Headers) p2p.Headers {
p2ph := make(p2p.Headers)
for _, rh := range h.Headers {
p2ph[rh.Key] = rh.Value
}
return p2ph
}
func headersP2PToPB(h p2p.Headers) *pb.Headers {
pbh := new(pb.Headers)
pbh.Headers = make([]*pb.Header, 0)
for key, value := range h {
pbh.Headers = append(pbh.Headers, &pb.Header{
Key: key,
Value: value,
})
}
return pbh
}