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satyr/src/server.ts

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import * as NodeMediaServer from "node-media-server";
import * as dirty from "dirty";
import { mkdir, fstat, access } from "fs";
import * as strf from "strftime";
import * as db from "./database";
import {config} from "./config";
const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
const { exec, execFile } = require('child_process');
const keystore = dirty();
function init () {
const nms = new NodeMediaServer({logType: 0,rtmp: config['rtmp']});
nms.run();
nms.on('postPublish', (id, StreamPath, args) => {
console.log("[NodeMediaServer] Publish Hook for stream:",id);
let session = nms.getSession(id);
let app: string = StreamPath.split("/")[1];
let key: string = StreamPath.split("/")[2];
//disallow urls not formatted exactly right
if (StreamPath.split("/").length !== 3 || key.includes(' ')){
console.log("[NodeMediaServer] Malformed URL, closing connection for stream:",id);
session.reject();
return false;
}
if(app !== config['media']['privateEndpoint']){
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//app isn't at public endpoint if we've reached this point
console.log("[NodeMediaServer] Wrong endpoint, rejecting stream:",id);
session.reject();
return false;
}
//if the url is formatted correctly and the user is streaming to the correct private endpoint
//grab the username from the database and redirect the stream there if the key is valid
//otherwise kill the session
db.query('select username,record_flag from users where stream_key='+db.raw.escape(key)+' limit 1').then(async (results) => {
if(results[0]){
//transcode to mpd after making sure directory exists
keystore[results[0].username] = key;
mkdir(config['http']['directory']+'/'+config['media']['publicEndpoint']+'/'+results[0].username, { recursive : true }, ()=>{;});
while(true){
if(session.audioCodec !== 0 && session.videoCodec !== 0){
transCommand(results[0].username, key).then((r) => {
execFile(config['media']['ffmpeg'], r, {maxBuffer: Infinity}, (err, stdout, stderr) => {
/*console.log(err);
console.log(stdout);
console.log(stderr);*/
});
});
break;
}
await sleep(300);
}
if(results[0].record_flag && config['media']['record']){
console.log('[NodeMediaServer] Initiating recording for stream:',id);
mkdir(config['http']['directory']+'/'+config['media']['publicEndpoint']+'/'+results[0].username, { recursive : true }, (err) => {
if (err) throw err;
execFile(config['media']['ffmpeg'], ['-loglevel', 'fatal', '-i', 'rtmp://127.0.0.1:'+config['rtmp']['port']+'/'+config['media']['privateEndpoint']+'/'+key, '-vcodec', 'copy', '-acodec', 'copy', config['http']['directory']+'/'+config['media']['publicEndpoint']+'/'+results[0].username+'/'+strf('%d%b%Y-%H%M')+'.mp4'], {
detached : true,
stdio : 'inherit',
maxBuffer: Infinity
}).unref();
//spawn an ffmpeg process to record the stream, then detach it completely
//ffmpeg can then (probably) finalize the recording if satyr crashes mid-stream
});
}
else {
console.log('[NodeMediaServer] Skipping recording for stream:',id);
}
db.query('update user_meta set live=true where username=\''+results[0].username+'\' limit 1');
db.query('SELECT twitch_key,enabled from twitch_mirror where username='+db.raw.escape(results[0].username)+' limit 1').then(async (tm) => {
if(!tm[0]['enabled'] || !config['twitch_mirror']['enabled'] || !config['twitch_mirror']['ingest']) return;
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console.log('[NodeMediaServer] Mirroring to twitch for stream:',id)
execFile(config['media']['ffmpeg'], ['-loglevel', 'fatal', '-i', 'rtmp://127.0.0.1:'+config['rtmp']['port']+'/'+config['media']['privateEndpoint']+'/'+key, '-vcodec', 'copy', '-acodec', 'copy', '-f', 'flv', config['twitch_mirror']['ingest']+tm[0]['twitch_key']], {
detached: true,
stdio : 'inherit',
maxBuffer: Infinity
}).unref();
});
console.log('[NodeMediaServer] Stream key ok for stream:',id);
}
else{
console.log('[NodeMediaServer] Invalid stream key for stream:',id);
session.reject();
}
});
});
nms.on('donePublish', (id, StreamPath, args) => {
let app: string = StreamPath.split("/")[1];
let key: string = StreamPath.split("/")[2];
if(app === config['media']['privateEndpoint']) {
db.query('update user_meta,users set user_meta.live=false where users.stream_key='+db.raw.escape(key));
db.query('select username from users where stream_key='+db.raw.escape(key)+' limit 1').then(async (results) => {
if(results[0]) keystore.rm(results[0].username);
});
}
});
nms.on('prePlay', (id, StreamPath, args) => {
let session = nms.getSession(id);
let app: string = StreamPath.split("/")[1];
let key: string = StreamPath.split("/")[2];
//correctly formatted urls again
if (StreamPath.split("/").length !== 3){
console.log("[NodeMediaServer] Malformed URL, closing connection for stream:",id);
session.reject();
return false;
}
//localhost can play from whatever endpoint
//other clients must use private endpoint
if(app !== config['media']['publicEndpoint'] && !session.isLocal) {
console.log("[NodeMediaServer] Non-local Play from private endpoint, rejecting client:",id);
session.reject();
return false;
}
//rewrite playpath to private endpoint serverside
//(hopefully)
if(app === config['media']['publicEndpoint']) {
if(keystore[key]){
session.playStreamPath = '/'+config['media']['privateEndpoint']+'/'+keystore[key];
return true;
}
}
});
}
async function transCommand(user: string, key: string): Promise<string[]>{
let args: string[] = ['-loglevel', 'fatal', '-y'];
if(config['transcode']['inputflags'] !== null && config['transcode']['inputflags'] !== "") args = args.concat(config['transcode']['inputflags'].split(" "));
args = args.concat(['-i', 'rtmp://127.0.0.1:'+config['rtmp']['port']+'/'+config['media']['privateEndpoint']+'/'+key, '-movflags', '+faststart']);
if(config['transcode']['adaptive']===true && config['transcode']['variants'] > 1) {
for(let i=0;i<config['transcode']['variants'];i++){
args = args.concat(['-map', '0:2']);
}
args = args.concat(['-map', '0:1', '-c:a', 'aac', '-c:v:0', 'libx264']);
for(let i=1;i<config['transcode']['variants'];i++){
args = args.concat(['-c:v:'+i, 'libx264',]);
}
for(let i=1;i<config['transcode']['variants'];i++){
let crf: number = Math.floor(18 + (i * 8)) > 51 ? 51 : Math.floor(18 + (i * 7));
args = args.concat(['-crf:'+i, ''+crf]);
}
for(let i=1;i<config['transcode']['variants'];i++){
let bv: number = Math.floor((5000 / config['transcode']['variants']) * (config['transcode']['variants'] - i));
args = args.concat(['-b:v:'+i, ''+bv]);
}
}
else {
args = args.concat(['-c:a', 'aac', '-c:v', 'libx264']);
}
args = args.concat(['-preset', 'veryfast', '-tune', 'zerolatency']);
//if(config['transcode']['format'] === 'dash')
args = args.concat(['-remove_at_exit', '1', '-seg_duration', '1', '-window_size', '30']);
if(config['transcode']['outputflags'] !== null && config['transcode']['outputflags'] !== "") args = args.concat(config['transcode']['outputflags'].split(" "));
args = args.concat(['-f', 'dash', config['http']['directory']+'/'+config['media']['publicEndpoint']+'/'+user+'/index.mpd']);
//else if(config['transcode']['format'] === 'hls')
//args = args.concat(['-remove_at_exit', '1', '-hls_time', '1', '-hls_list_size', '30', '-f', 'hls', config['http']['directory']+'/'+config['media']['publicEndpoint']+'/'+user+'/index.m3u8']);
return args;
}
export { init };