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blockhandler.go
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blockhandler.go
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package main
import (
"bufio"
"fmt"
"os"
"time"
ps "github.com/libp2p/go-peerstream"
tpt "github.com/libp2p/go-tcp-transport"
ma "github.com/multiformats/go-multiaddr"
yamux "github.com/whyrusleeping/go-smux-yamux"
)
func die(err error) {
fmt.Fprintf(os.Stderr, "error: %s\n", err)
os.Exit(1)
}
func main() {
// create a new Swarm
swarm := ps.NewSwarm(yamux.DefaultTransport)
defer swarm.Close()
// tell swarm what to do with a new incoming streams.
// EchoHandler just echos back anything they write.
swarm.SetStreamHandler(ps.EchoHandler)
tr := tpt.NewTCPTransport()
addr, err := ma.NewMultiaddr("/ip4/127.0.0.1/tcp/12001")
if err != nil {
die(err)
}
l, err := tr.Listen(addr)
if err != nil {
die(err)
}
if _, err := swarm.AddListener(l); err != nil {
die(err)
}
dialer, err := tr.Dialer(addr)
if err != nil {
die(err)
}
nc, err := dialer.Dial(addr)
if err != nil {
die(err)
}
c, err := swarm.AddConn(nc)
if err != nil {
die(err)
}
nRcvStream := 0
bio := bufio.NewReader(os.Stdin)
swarm.SetStreamHandler(func(s *ps.Stream) {
log("handling new stream %d", nRcvStream)
nRcvStream++
line, err := bio.ReadString('\n')
if err != nil {
die(err)
}
_ = line
// line = "read: " + line
// s.Write([]byte(line))
s.Close()
})
nSndStream := 0
for {
<-time.After(200 * time.Millisecond)
_, err := swarm.NewStreamWithConn(c)
if err != nil {
die(err)
}
log("sender got new stream %d", nSndStream)
nSndStream++
}
}
func log(s string, ifs ...interface{}) {
fmt.Fprintf(os.Stderr, s+"\n", ifs...)
}