375 lines
10 KiB
JavaScript
375 lines
10 KiB
JavaScript
const express = require('express');
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const router = express.Router();
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const events = require('events');
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const runtime = require('../runtime');
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const { Job } = require('../job');
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const package = require('../package');
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const logger = require('logplease').create('api/v2');
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const SIGNALS = [
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'SIGABRT',
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'SIGALRM',
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'SIGBUS',
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'SIGCHLD',
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'SIGCLD',
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'SIGCONT',
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'SIGEMT',
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'SIGFPE',
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'SIGHUP',
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'SIGILL',
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'SIGINFO',
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'SIGINT',
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'SIGIO',
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'SIGIOT',
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'SIGKILL',
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'SIGLOST',
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'SIGPIPE',
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'SIGPOLL',
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'SIGPROF',
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'SIGPWR',
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'SIGQUIT',
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'SIGSEGV',
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'SIGSTKFLT',
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'SIGSTOP',
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'SIGTSTP',
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'SIGSYS',
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'SIGTERM',
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'SIGTRAP',
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'SIGTTIN',
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'SIGTTOU',
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'SIGUNUSED',
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'SIGURG',
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'SIGUSR1',
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'SIGUSR2',
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'SIGVTALRM',
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'SIGXCPU',
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'SIGXFSZ',
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'SIGWINCH',
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];
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// ref: https://man7.org/linux/man-pages/man7/signal.7.html
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function get_job(body) {
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let {
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language,
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version,
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args,
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stdin,
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files,
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compile_memory_limit,
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run_memory_limit,
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run_timeout,
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compile_timeout,
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} = body;
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return new Promise((resolve, reject) => {
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if (!language || typeof language !== 'string') {
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return reject({
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message: 'language is required as a string',
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});
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}
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if (!version || typeof version !== 'string') {
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return reject({
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message: 'version is required as a string',
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});
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}
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if (!files || !Array.isArray(files)) {
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return reject({
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message: 'files is required as an array',
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});
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}
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for (const [i, file] of files.entries()) {
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if (typeof file.content !== 'string') {
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return reject({
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message: `files[${i}].content is required as a string`,
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});
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}
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}
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const rt = runtime.get_latest_runtime_matching_language_version(
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language,
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version
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);
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if (rt === undefined) {
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return reject({
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message: `${language}-${version} runtime is unknown`,
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});
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}
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if (
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rt.language !== 'file' &&
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!files.some(file => !file.encoding || file.encoding === 'utf8')
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) {
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return reject({
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message: 'files must include at least one utf8 encoded file',
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});
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}
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for (const constraint of ['memory_limit', 'timeout']) {
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for (const type of ['compile', 'run']) {
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const constraint_name = `${type}_${constraint}`;
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const constraint_value = body[constraint_name];
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const configured_limit = rt[`${constraint}s`][type];
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if (!constraint_value) {
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continue;
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}
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if (typeof constraint_value !== 'number') {
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return reject({
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message: `If specified, ${constraint_name} must be a number`,
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});
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}
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if (configured_limit <= 0) {
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continue;
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}
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if (constraint_value > configured_limit) {
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return reject({
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message: `${constraint_name} cannot exceed the configured limit of ${configured_limit}`,
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});
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}
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if (constraint_value < 0) {
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return reject({
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message: `${constraint_name} must be non-negative`,
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});
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}
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}
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}
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compile_timeout = compile_timeout || rt.timeouts.compile;
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run_timeout = run_timeout || rt.timeouts.run;
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compile_memory_limit = compile_memory_limit || rt.memory_limits.compile;
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run_memory_limit = run_memory_limit || rt.memory_limits.run;
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resolve(
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new Job({
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runtime: rt,
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args: args || [],
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stdin: stdin || '',
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files,
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timeouts: {
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run: run_timeout,
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compile: compile_timeout,
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},
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memory_limits: {
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run: run_memory_limit,
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compile: compile_memory_limit,
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},
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})
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);
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});
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}
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router.use((req, res, next) => {
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if (['GET', 'HEAD', 'OPTIONS'].includes(req.method)) {
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return next();
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}
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if (!req.headers['content-type']?.startsWith('application/json')) {
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return res.status(415).send({
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message: 'requests must be of type application/json',
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});
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}
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next();
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});
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router.ws('/connect', async (ws, req) => {
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let job = null;
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let eventBus = new events.EventEmitter();
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eventBus.on('stdout', data =>
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ws.send(
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JSON.stringify({
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type: 'data',
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stream: 'stdout',
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data: data.toString(),
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})
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)
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);
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eventBus.on('stderr', data =>
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ws.send(
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JSON.stringify({
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type: 'data',
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stream: 'stderr',
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data: data.toString(),
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})
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)
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);
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eventBus.on('stage', stage =>
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ws.send(JSON.stringify({ type: 'stage', stage }))
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);
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eventBus.on('exit', (stage, status) =>
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ws.send(JSON.stringify({ type: 'exit', stage, ...status }))
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);
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ws.on('message', async data => {
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try {
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const msg = JSON.parse(data);
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switch (msg.type) {
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case 'init':
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if (job === null) {
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job = await get_job(msg);
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await job.prime();
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ws.send(
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JSON.stringify({
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type: 'runtime',
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language: job.runtime.language,
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version: job.runtime.version.raw,
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})
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);
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await job.execute_interactive(eventBus);
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ws.close(4999, 'Job Completed');
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} else {
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ws.close(4000, 'Already Initialized');
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}
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break;
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case 'data':
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if (job !== null) {
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if (msg.stream === 'stdin') {
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eventBus.emit('stdin', msg.data);
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} else {
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ws.close(4004, 'Can only write to stdin');
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}
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} else {
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ws.close(4003, 'Not yet initialized');
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}
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break;
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case 'signal':
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if (job !== null) {
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if (SIGNALS.includes(msg.signal)) {
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eventBus.emit('signal', msg.signal);
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} else {
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ws.close(4005, 'Invalid signal');
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}
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} else {
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ws.close(4003, 'Not yet initialized');
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}
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break;
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}
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} catch (error) {
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ws.send(JSON.stringify({ type: 'error', message: error.message }));
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ws.close(4002, 'Notified Error');
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// ws.close message is limited to 123 characters, so we notify over WS then close.
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}
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});
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ws.on('close', async () => {
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if (job !== null) {
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await job.cleanup();
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}
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});
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setTimeout(() => {
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//Terminate the socket after 1 second, if not initialized.
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if (job === null) ws.close(4001, 'Initialization Timeout');
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}, 1000);
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});
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router.post('/execute', async (req, res) => {
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try {
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const job = await get_job(req.body);
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await job.prime();
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const result = await job.execute();
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await job.cleanup();
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return res.status(200).send(result);
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} catch (error) {
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return res.status(400).json(error);
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}
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});
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router.get('/runtimes', (req, res) => {
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const runtimes = runtime.map(rt => {
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return {
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language: rt.language,
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version: rt.version.raw,
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aliases: rt.aliases,
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runtime: rt.runtime,
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};
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});
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return res.status(200).send(runtimes);
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});
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router.get('/packages', async (req, res) => {
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logger.debug('Request to list packages');
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let packages = await package.get_package_list();
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packages = packages.map(pkg => {
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return {
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language: pkg.language,
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language_version: pkg.version.raw,
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installed: pkg.installed,
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};
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});
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return res.status(200).send(packages);
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});
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router.post('/packages', async (req, res) => {
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logger.debug('Request to install package');
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const { language, version } = req.body;
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const pkg = await package.get_package(language, version);
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if (pkg == null) {
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return res.status(404).send({
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message: `Requested package ${language}-${version} does not exist`,
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});
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}
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try {
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const response = await pkg.install();
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return res.status(200).send(response);
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} catch (e) {
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logger.error(
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`Error while installing package ${pkg.language}-${pkg.version}:`,
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e.message
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);
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return res.status(500).send({
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message: e.message,
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});
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}
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});
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router.delete('/packages', async (req, res) => {
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logger.debug('Request to uninstall package');
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const { language, version } = req.body;
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const pkg = await package.get_package(language, version);
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if (pkg == null) {
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return res.status(404).send({
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message: `Requested package ${language}-${version} does not exist`,
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});
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}
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try {
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const response = await pkg.uninstall();
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return res.status(200).send(response);
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} catch (e) {
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logger.error(
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`Error while uninstalling package ${pkg.language}-${pkg.version}:`,
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e.message
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);
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return res.status(500).send({
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message: e.message,
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});
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}
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});
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module.exports = router;
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