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More async conversion

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This commit is contained in:
mmorrison 2019-01-10 06:03:07 -06:00
parent 484e99b29c
commit efe12a00aa
25 changed files with 774 additions and 858 deletions
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145
protocols/minecraft.js
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@ -1,96 +1,75 @@
const varint = require('varint'),
async = require('async'),
Core = require('./core');
function varIntBuffer(num) {
return Buffer.from(varint.encode(num));
}
function buildPacket(id,data) {
if(!data) data = Buffer.from([]);
const idBuffer = varIntBuffer(id);
return Buffer.concat([
varIntBuffer(data.length+idBuffer.length),
idBuffer,
data
]);
}
const Core = require('./core'),
Varint = require('varint');
class Minecraft extends Core {
run(state) {
/** @type Buffer */
let receivedData;
async run(state) {
const portBuf = Buffer.alloc(2);
portBuf.writeUInt16BE(this.options.port_query,0);
async.series([
(c) => {
// build and send handshake and status TCP packet
const addressBuf = Buffer.from(this.options.host,'utf8');
const portBuf = Buffer.alloc(2);
portBuf.writeUInt16BE(this.options.port_query,0);
const bufs = [
this.varIntBuffer(4),
this.varIntBuffer(addressBuf.length),
addressBuf,
portBuf,
this.varIntBuffer(1)
];
const addressBuf = Buffer.from(this.options.address,'utf8');
const outBuffer = Buffer.concat([
this.buildPacket(0,Buffer.concat(bufs)),
this.buildPacket(0)
]);
const bufs = [
varIntBuffer(4),
varIntBuffer(addressBuf.length),
addressBuf,
portBuf,
varIntBuffer(1)
];
const data = await this.withTcp(async socket => {
return await this.tcpSend(socket, outBuffer, data => {
if(data.length < 10) return;
const reader = this.reader(data);
const length = reader.varint();
if(data.length < length) return;
return reader.rest();
});
});
const outBuffer = Buffer.concat([
buildPacket(0,Buffer.concat(bufs)),
buildPacket(0)
]);
const reader = this.reader(data);
this.tcpSend(outBuffer, (data) => {
if(data.length < 10) return false;
const expected = varint.decode(data);
data = data.slice(varint.decode.bytes);
if(data.length < expected) return false;
receivedData = data;
c();
return true;
const packetId = reader.varint();
this.debugLog("Packet ID: "+packetId);
const strLen = reader.varint();
this.debugLog("String Length: "+strLen);
const str = reader.rest().toString('utf8');
this.debugLog(str);
const json = JSON.parse(str);
delete json.favicon;
state.raw = json;
state.maxplayers = json.players.max;
if(json.players.sample) {
for(const player of json.players.sample) {
state.players.push({
id: player.id,
name: player.name
});
},
(c) => {
// parse response
let data = receivedData;
const packetId = varint.decode(data);
this.debugLog("Packet ID: "+packetId);
data = data.slice(varint.decode.bytes);
const strLen = varint.decode(data);
this.debugLog("String Length: "+strLen);
data = data.slice(varint.decode.bytes);
const str = data.toString('utf8');
this.debugLog(str);
let json;
try {
json = JSON.parse(str);
delete json.favicon;
} catch(e) {
return this.fatal('Invalid JSON');
}
state.raw = json;
state.maxplayers = json.players.max;
if(json.players.sample) {
for(const player of json.players.sample) {
state.players.push({
id: player.id,
name: player.name
});
}
}
while(state.players.length < json.players.online) {
state.players.push({});
}
this.finish(state);
}
}
while(state.players.length < json.players.online) {
state.players.push({});
}
}
varIntBuffer(num) {
return Buffer.from(Varint.encode(num));
}
buildPacket(id,data) {
if(!data) data = Buffer.from([]);
const idBuffer = this.varIntBuffer(id);
return Buffer.concat([
this.varIntBuffer(data.length+idBuffer.length),
idBuffer,
data
]);
}
}