nim-libp2p/examples/go-daemon/chat.nim

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import chronos, nimcrypto, strutils
import ../../libp2p/daemon/daemonapi
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## nim c -r --threads:on chat.nim
when not(compileOption("threads")):
{.fatal: "Please, compile this program with the --threads:on option!".}
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const
ServerProtocols = @["/test-chat-stream"]
type
CustomData = ref object
api: DaemonAPI
remotes: seq[StreamTransport]
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consoleFd: AsyncFD
serveFut: Future[void]
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proc threadMain(wfd: AsyncFD) {.thread.} =
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## This procedure performs reading from `stdin` and sends data over
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## pipe to main thread.
var transp = fromPipe(wfd)
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while true:
var line = stdin.readLine()
let res = waitFor transp.write(line & "\r\n")
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proc serveThread(udata: CustomData) {.async.} =
## This procedure perform reading on pipe and sends data to remote clients.
var transp = fromPipe(udata.consoleFd)
proc remoteReader(transp: StreamTransport) {.async.} =
while true:
var line = await transp.readLine()
if len(line) == 0:
break
echo ">> ", line
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while true:
try:
var line = await transp.readLine()
if line.startsWith("/connect"):
var parts = line.split(" ")
if len(parts) == 2:
var peerId = PeerID.init(parts[1])
var address = MultiAddress.init(multiCodec("p2p-circuit"))
address &= MultiAddress.init(multiCodec("p2p"), peerId)
echo "= Searching for peer ", peerId.pretty()
var id = await udata.api.dhtFindPeer(peerId)
echo "= Peer " & parts[1] & " found at addresses:"
for item in id.addresses:
echo $item
echo "= Connecting to peer ", $address
await udata.api.connect(peerId, @[address], 30)
echo "= Opening stream to peer chat ", parts[1]
var stream = await udata.api.openStream(peerId, ServerProtocols)
udata.remotes.add(stream.transp)
echo "= Connected to peer chat ", parts[1]
asyncCheck remoteReader(stream.transp)
elif line.startsWith("/search"):
var parts = line.split(" ")
if len(parts) == 2:
var peerId = PeerID.init(parts[1])
echo "= Searching for peer ", peerId.pretty()
var id = await udata.api.dhtFindPeer(peerId)
echo "= Peer " & parts[1] & " found at addresses:"
for item in id.addresses:
echo $item
elif line.startsWith("/consearch"):
var parts = line.split(" ")
if len(parts) == 2:
var peerId = PeerID.init(parts[1])
echo "= Searching for peers connected to peer ", parts[1]
var peers = await udata.api.dhtFindPeersConnectedToPeer(peerId)
echo "= Found ", len(peers), " connected to peer ", parts[1]
for item in peers:
var peer = item.peer
var addresses = newSeq[string]()
var relay = false
for a in item.addresses:
addresses.add($a)
if a.protoName() == "/p2p-circuit":
relay = true
break
if relay:
echo peer.pretty(), " * ", " [", addresses.join(", "), "]"
else:
echo peer.pretty(), " [", addresses.join(", "), "]"
elif line.startsWith("/exit"):
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break
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else:
var msg = line & "\r\n"
echo "<< ", line
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var pending = newSeq[Future[int]]()
for item in udata.remotes:
pending.add(item.write(msg))
if len(pending) > 0:
var results = await all(pending)
except:
echo getCurrentException().msg
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proc main() {.async.} =
var data = new CustomData
data.remotes = newSeq[StreamTransport]()
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var (rfd, wfd) = createAsyncPipe()
if rfd == asyncInvalidPipe or wfd == asyncInvalidPipe:
raise newException(ValueError, "Could not initialize pipe!")
data.consoleFd = rfd
data.serveFut = serveThread(data)
var thread: Thread[AsyncFD]
thread.createThread(threadMain, wfd)
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echo "= Starting P2P node"
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data.api = await newDaemonApi({DHTFull, Bootstrap})
await sleepAsync(3000)
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var id = await data.api.identity()
proc streamHandler(api: DaemonAPI, stream: P2PStream) {.async.} =
echo "= Peer ", stream.peer.pretty(), " joined chat"
data.remotes.add(stream.transp)
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while true:
var line = await stream.transp.readLine()
if len(line) == 0:
break
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echo ">> ", line
await data.api.addHandler(ServerProtocols, streamHandler)
echo "= Your PeerID is ", id.peer.pretty()
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await data.serveFut
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when isMainModule:
waitFor(main())