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#!/usr/bin/node
/* jshint esnext:true */
/* download data from AWS and push into process queues */
"use strict";
const amqp = require("amqplib"),
Promise = require("bluebird"),
winston = require("winston"),
loggly = require("winston-loggly-bulk"),
request = require("request-promise"),
moment = require("moment");
const RABBITMQ_URI = process.env.RABBITMQ_URI || "amqp://localhost",
QUEUE = process.env.QUEUE || "telesuck",
SHRINK_QUEUE = process.env.SHRINK_QUEUE || "shrink",
LOGGLY_TOKEN = process.env.LOGGLY_TOKEN;
const logger = new (winston.Logger)({
transports: [
new (winston.transports.Console)({
timestamp: true,
colorize: true
})
]
});
// loggly integration
if (LOGGLY_TOKEN)
logger.add(winston.transports.Loggly, {
inputToken: LOGGLY_TOKEN,
subdomain: "kvahuja",
tags: ["backend", "telesucker", QUEUE],
json: true
});
amqp.connect(RABBITMQ_URI).then(async (rabbit) => {
process.on("SIGINT", () => {
rabbit.close();
process.exit();
});
const ch = await rabbit.createChannel();
await ch.assertQueue(QUEUE, { durable: true });
await ch.assertQueue(QUEUE + "_failed", { durable: true });
await ch.assertQueue(SHRINK_QUEUE, { durable: true });
await ch.prefetch(1);
logger.info("configuration", { QUEUE, SHRINK_QUEUE });
ch.consume(QUEUE, async (msg) => {
const url = msg.content.toString();
try {
await getTelemetry(url, msg.properties.headers.match_api_id);
} catch (err) {
logger.error("Telemetry download error", err);
await ch.sendToQueue(QUEUE + "_failed", msg.content, {
persistent: true,
headers: msg.properties.headers
});
ch.nack(msg, false, false);
return;
}
logger.info("done", url);
ch.ack(msg);
}, { noAck: false });
// download Telemetry, filter irrelevant events, forward the rest to `process`
async function getTelemetry(url, match_api_id) {
logger.info("downloading Telemetry",
{ url: url, match_api_id: match_api_id });
// download
const telemetry = await loggedRequest(url),
spawn = telemetry.filter((ev) => ev.type == "PlayerFirstSpawn")[0],
spawn_time = moment.parseZone(spawn.time);
const forward_profiler = logger.startTimer();
// return telemetry { m_a_id, data, start, end } in an interval
const gamePhase = (start, end) => {
let spawn_plus_start = spawn_time.clone()
.add(start, "seconds")
.format("YYYY-MM-DDTHH:mm:ss"),
spawn_plus_end = spawn_time.clone()
.add(end, "seconds")
.format("YYYY-MM-DDTHH:mm:ss");
return {
match_api_id: match_api_id,
data: telemetry.slice(
// assumes Telemetry is ordered by timestamp,
// assumes it uses the format as above
telemetry.findIndex((ev) => !(ev.time<spawn_plus_start)),
telemetry.findIndex((ev) => !(ev.time<spawn_plus_end))
// slice does not include end
),
start: start,
end: end
} };
// split into phases
const phases = [
// genious idea to put bans into Telemetry.
gamePhase(-5 * 60, 0) // draft
];
await Promise.each(phases, async (phase) => {
if (phase.data.length > 0) {
const notify = "match." + match_api_id;
await ch.publish("amq.topic", notify, new Buffer("phase_pending"));
await ch.sendToQueue(SHRINK_QUEUE, new Buffer(
JSON.stringify(phase)), {
persistent: true, type: "telemetry",
headers: { notify }
})
} else {
logger.info("Warning! No data for this phase.", { phase });
}
});
forward_profiler.done("Telemetry splitting");
logger.info("Telemetry done",
{ url: url, match_api_id: match_api_id });
}
async function loggedRequest(url) {
let response;
try {
const opts = {
json: true,
gzip: true,
time: true,
forever: true,
strictSSL: true,
resolveWithFullResponse: true
};
logger.info("AWS request", { uri: url, });
response = await request(url, opts);
if (typeof response.body === "string") {
if (!response.body.startsWith("[")) {
// invalid JSON
// https://github.com/gamelocker/vainglory-assets/issues/325
let hotfix = response.body.replace(/\{ "time":/g, ', { "time":');
// `},` -> `} \n ]`
hotfix = "[" + hotfix.substring(2, hotfix.length) + "]";
response.body = JSON.parse(hotfix);
} else {
logger.warn("invalid response", { url });
//throw { response.body };
JSON.parse(response.body);
}
}
return response.body;
} catch (err) {
if (err.response != undefined) {
logger.warn("AWS error", {
uri: url,
error: err.response.body
});
} else {
//logger.error(err);
}
throw err;
} finally {
if (response != undefined) // else non-requests error
logger.info("AWS response", {
status: response.statusCode,
connection_start: response.timings.connect,
connection_end: response.timings.end
});
}
}
});
process.on("unhandledRejection", (err) => {
logger.error(err);
process.exit(1); // fail hard and die
});
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