使用golang libp2p streams向多台主机发送数据的步骤如下:
import (
"context"
"fmt"
"github.com/libp2p/go-libp2p"
"github.com/libp2p/go-libp2p-core/network"
"github.com/libp2p/go-libp2p-core/protocol"
"github.com/libp2p/go-libp2p-host"
"github.com/libp2p/go-libp2p/p2p/protocol/ping"
)
func createHost(ctx context.Context) (host.Host, error) {
return libp2p.New(ctx)
}
const myProtocol = protocol.ID("/myprotocol/1.0.0")
func handleStream(stream network.Stream) {
// 在这里处理接收到的数据流
}
func startHost(host host.Host) {
host.SetStreamHandler(myProtocol, handleStream)
}
func connectToPeers(ctx context.Context, host host.Host, peerAddresses []string) error {
for _, addr := range peerAddresses {
peerAddr, _ := ma.NewMultiaddr(addr)
info, _ := peer.AddrInfoFromP2pAddr(peerAddr)
host.Connect(ctx, *info)
}
return nil
}
func sendData(ctx context.Context, host host.Host, peerAddresses []string, data []byte) error {
for _, addr := range peerAddresses {
peerAddr, _ := ma.NewMultiaddr(addr)
info, _ := peer.AddrInfoFromP2pAddr(peerAddr)
stream, _ := host.NewStream(ctx, info.ID, myProtocol)
_, err := stream.Write(data)
if err != nil {
return err
}
stream.Close()
}
return nil
}
package main
import (
"context"
"fmt"
"github.com/libp2p/go-libp2p"
"github.com/libp2p/go-libp2p-core/network"
"github.com/libp2p/go-libp2p-core/protocol"
"github.com/libp2p/go-libp2p-host"
"github.com/libp2p/go-libp2p/p2p/protocol/ping"
ma "github.com/multiformats/go-multiaddr"
)
const myProtocol = protocol.ID("/myprotocol/1.0.0")
func main() {
ctx := context.Background()
host, err := createHost(ctx)
if err != nil {
panic(err)
}
startHost(host)
peerAddresses := []string{"/ip4/127.0.0.1/tcp/4001/p2p/QmPeerAddress1", "/ip4/127.0.0.1/tcp/4002/p2p/QmPeerAddress2"}
err = connectToPeers(ctx, host, peerAddresses)
if err != nil {
panic(err)
}
data := []byte("Hello, World!")
err = sendData(ctx, host, peerAddresses, data)
if err != nil {
panic(err)
}
}
func createHost(ctx context.Context) (host.Host, error) {
return libp2p.New(ctx)
}
func handleStream(stream network.Stream) {
// 在这里处理接收到的数据流
}
func startHost(host host.Host) {
host.SetStreamHandler(myProtocol, handleStream)
}
func connectToPeers(ctx context.Context, host host.Host, peerAddresses []string) error {
for _, addr := range peerAddresses {
peerAddr, _ := ma.NewMultiaddr(addr)
info, _ := peer.AddrInfoFromP2pAddr(peerAddr)
host.Connect(ctx, *info)
}
return nil
}
func sendData(ctx context.Context, host host.Host, peerAddresses []string, data []byte) error {
for _, addr := range peerAddresses {
peerAddr, _ := ma.NewMultiaddr(addr)
info, _ := peer.AddrInfoFromP2pAddr(peerAddr)
stream, _ := host.NewStream(ctx, info.ID, myProtocol)
_, err := stream.Write(data)
if err != nil {
return err
}
stream.Close()
}
return nil
}
请注意,以上示例代码仅用于演示如何使用golang libp2p streams向多台主机发送数据。在实际应用中,您可能需要根据具体需求进行适当的修改和优化。
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