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refactor(docs): async await version of examples/chat (#482)

Browse Source 
* fix: performance bottleneck in stat.js (#463)

Array.shift seems to be very slow, perhaps linear, on some
engines, resulting in  _update consuming a lot of CPU.

* docs(fix): correct docs and example for pnet (#464)

* docs(fix): correct docs and example for pnet

* docs(fix): correct pnet docs

* docs(fix): update README.md language (#468)

* docs: reciprocate (#474)

* docs(example): fix ipfs cat (#475)

`ipfs.files.cat` is incorrect. the correct function is `ipfs.cat`

* fix: async-await example chat

* fix: move handler before start

* fix: examples readme typos (#481)

* fix: simplify libp2p bundle for echo example

* chore: remove unused vars
This commit is contained in:
dirkmc
2019-11-27 06:43:17 -05:00
committed by Jacob Heun
parent 953d185c39
commit 472e14f2b4
4 changed files with 100 additions and 157 deletions
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94
examples/chat/src/dialer.js
View File

@ -4,76 +4,44 @@
const PeerId = require('peer-id')
const PeerInfo = require('peer-info')
const Node = require('./libp2p-bundle')
const pull = require('pull-stream')
const async = require('async')
const Pushable = require('pull-pushable')
const p = Pushable()
let idListener
const { stdinToStream, streamToConsole } = require('./stream')
async.parallel([
(callback) => {
PeerId.createFromJSON(require('./peer-id-dialer'), (err, idDialer) => {
if (err) {
throw err
}
callback(null, idDialer)
})
},
(callback) => {
PeerId.createFromJSON(require('./peer-id-listener'), (err, idListener) => {
if (err) {
throw err
}
callback(null, idListener)
})
}
], (err, ids) => {
if (err) throw err
const peerDialer = new PeerInfo(ids[0])
async function run() {
const [idDialer, idListener] = await Promise.all([
PeerId.createFromJSON(require('./peer-id-dialer')),
PeerId.createFromJSON(require('./peer-id-listener'))
])
// Create a new libp2p node on localhost with a randomly chosen port
const peerDialer = new PeerInfo(idDialer)
peerDialer.multiaddrs.add('/ip4/0.0.0.0/tcp/0')
const nodeDialer = new Node({
peerInfo: peerDialer
})
const peerListener = new PeerInfo(ids[1])
idListener = ids[1]
// Create a PeerInfo with the listening peer's address
const peerListener = new PeerInfo(idListener)
peerListener.multiaddrs.add('/ip4/127.0.0.1/tcp/10333')
nodeDialer.start((err) => {
if (err) {
throw err
}
console.log('Dialer ready, listening on:')
// Start the libp2p host
await nodeDialer.start()
peerListener.multiaddrs.forEach((ma) => {
console.log(ma.toString() + '/p2p/' + idListener.toB58String())
})
nodeDialer.dialProtocol(peerListener, '/chat/1.0.0', (err, conn) => {
if (err) {
throw err
}
console.log('nodeA dialed to nodeB on protocol: /chat/1.0.0')
console.log('Type a message and see what happens')
// Write operation. Data sent as a buffer
pull(
p,
conn
)
// Sink, data converted from buffer to utf8 string
pull(
conn,
pull.map((data) => {
return data.toString('utf8').replace('\n', '')
}),
pull.drain(console.log)
)
process.stdin.setEncoding('utf8')
process.openStdin().on('data', (chunk) => {
var data = chunk.toString()
p.push(data)
})
})
// Output this node's address
console.log('Dialer ready, listening on:')
peerListener.multiaddrs.forEach((ma) => {
console.log(ma.toString() + '/p2p/' + idListener.toB58String())
})
})
// Dial to the remote peer (the "listener")
const { stream } = await nodeDialer.dialProtocol(peerListener, '/chat/1.0.0')
console.log('Dialer dialed to listener on protocol: /chat/1.0.0')
console.log('Type a message and see what happens')
// Send stdin to the stream
stdinToStream(stream)
// Read the stream and output to console
streamToConsole(stream)
}
run()