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Chris Marsh 2017-07-27 15:24:35 -07:00
parent 20ad7e4ced
commit ffab428366
4 changed files with 0 additions and 224 deletions
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9
test-rpc-server/package.json
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{
"name": "test-rpc-server",
"version": "0.0.0",
"private": true,
"scripts": {
"server": "node rpc-server.js",
"client": "node test-client.js"
}
}

77
test-rpc-server/rpc-message.js
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const path = require('path');
const VERSION = 1;
const OPCODES = {
HANDSHAKE: 0,
FRAME: 1,
CLOSE: 2,
PING: 3,
PONG: 4,
};
let PipePath;
if (process.platform == 'win32') {
PipePath = '\\\\?\\pipe\\discord-ipc';
}
else {
const temp = process.env.XDG_RUNTIME_DIR || process.env.TMPDIR || process.env.TMP || process.env.TEMP || '/tmp';
PipePath = path.join(temp, 'discord-ipc');
}
class RpcMessage {
static serialize(opcode, obj) {
const serializedJson = JSON.stringify(obj);
const msgLen = serializedJson.length;
let buff = Buffer.alloc(8 + msgLen);
buff.writeInt32LE(opcode, 0);
buff.writeInt32LE(msgLen, 4);
buff.write(serializedJson, 8, serializedJson.length, 'utf-8');
return buff;
}
static handshake(id) {
const opcode = OPCODES.HANDSHAKE;
return RpcMessage.serialize(opcode, {
client_id: id,
v: VERSION
});
}
static send(obj) {
const opcode = OPCODES.FRAME;
return RpcMessage.serialize(opcode, obj);
}
static sendClose(code, message) {
const opcode = OPCODES.CLOSE;
return RpcMessage.serialize(opcode, {code, message});
}
static sendPing(message) {
const opcode = OPCODES.PING;
return RpcMessage.serialize(opcode, {message});
}
static deserialize(buff) {
const opcode = buff.readInt32LE(0);
const msgLen = buff.readInt32LE(4);
if (msgLen == 0) {
return {opcode, data: ''};
}
if (buff.length < (msgLen + 8)) {
return null;
}
const msg = buff.toString('utf-8', 8, msgLen + 8);
try {
return {opcode, data: JSON.parse(msg)};
} catch(e) {
console.log(`failed to parse "${msg}"`);
console.error(e);
return {opcode: OPCODES.CLOSE, message: e.message};
}
}
};
module.exports = {OPCODES, PipePath, RpcMessage};

75
test-rpc-server/rpc-server.js
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const net = require('net');
const repl = require('repl');
const {PipePath, RpcMessage} = require('./rpc-message');
let connectionNonce = 0;
global.connections = {};
const server = net.createServer(function(sock) {
connectionNonce += 1;
console.log('Server: on connection', connectionNonce);
let myConnection = connectionNonce;
let messages = 0;
global.connections[myConnection] = sock;
sock.on('data', function(data) {
messages++;
const msgObj = RpcMessage.deserialize(data);
if (msgObj != null) {
const {opcode, data} = msgObj;
console.log(`\nServer (${myConnection}): got opcode: ${opcode}, data: ${JSON.stringify(data)}`);
}
else {
console.log('\nServer: got some data', data.toString());
}
});
sock.on('end', function() {
delete global.connections[myConnection];
console.log('\nServer: on end', myConnection);
});
});
server.on('close', function(){
console.log('\nServer: on close');
});
try {
server.listen(PipePath, function(){
console.log('\nServer: on listening');
});
} catch(e) {
console.error('\nServer: could not start:', e);
}
const replServer = repl.start({prompt: '> ', useGlobal: true, breakEvalOnSigint: true});
replServer.defineCommand('kill', {
help: 'Kill a client',
action(who) {
this.bufferedCommand = '';
who = parseInt(who, 10);
const sock = global.connections[who];
if (sock) {
console.log('killing', who);
sock.end(RpcMessage.sendClose(123, 'killed'));
}
this.displayPrompt();
}
});
replServer.defineCommand('ping', {
help: 'Ping all clients',
action() {
this.bufferedCommand = '';
Object.keys(global.connections).forEach((who) => {
const sock = global.connections[who];
if (sock) {
console.log('pinging', who);
sock.write(RpcMessage.sendPing('hello'));
}
})
this.displayPrompt();
}
});

63
test-rpc-server/test-client.js
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const net = require('net');
const {OPCODES, PipePath, RpcMessage} = require('./rpc-message');
const APP_ID = '12345678910';
global.isConnected = false;
global.timeoutId = null;
function sendMesg(testUpdatesToSend, stream) {
const msgObj = {
state: (testUpdatesToSend % 2 == 0) ? 'In a match' : 'In Lobby',
details: 'Excited'
};
console.log('Client: send update:', msgObj);
stream.write(RpcMessage.send(msgObj));
}
function sendMessageLoop(testUpdatesToSend, interval, stream) {
global.timeoutId = null;
if (!global.isConnected) {
return;
}
sendMesg(testUpdatesToSend, stream);
if (testUpdatesToSend > 1) {
global.timeoutId = setTimeout(() => {sendMessageLoop(testUpdatesToSend - 1, interval, stream)}, interval);
} else {
shutdown();
}
}
const client = net.connect(PipePath, function(stream) {
console.log('Client: on connection');
global.isConnected = true;
client.write(RpcMessage.handshake(APP_ID));
sendMessageLoop(10, 3000, client);
});
client.on('data', function(data) {
const msgObj = RpcMessage.deserialize(data);
if (msgObj != null) {
const {opcode, data} = msgObj;
console.log(`Client: got opcode: ${opcode}, data: ${JSON.stringify(data)}`);
if (opcode == OPCODES.CLOSE) {
shutdown();
}
} else {
console.log('Client: got some data', data);
}
});
client.on('end', function() {
global.isConnected = false;
console.log('Client: on end');
});
function shutdown() {
if (global.timeoutId !== null) {
clearTimeout(global.timeoutId);
global.timeoutId = null;
}
client.end();
}