blob: e00411c6a0fb4482a0ba9a70faacc690fa17b7dd [file] [log] [blame] [raw]
#!/usr/bin/env node
// Copyright (c) 2012, Matt Godbolt
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
const startTime = new Date();
// Initialise options and properties. Don't load any handlers here; they
// may need an initialised properties library.
const nopt = require('nopt'),
os = require('os'),
props = require('./lib/properties'),
child_process = require('child_process'),
path = require('path'),
process = require('process'),
fs = require('fs-extra'),
systemdSocket = require('systemd-socket'),
url = require('url'),
urljoin = require('url-join'),
_ = require('underscore'),
express = require('express'),
responseTime = require('response-time'),
Sentry = require('@sentry/node'),
{logger, logToPapertrail, suppressConsoleLog} = require('./lib/logger'),
utils = require('./lib/utils'),
initialiseWine = require('./lib/exec').initialiseWine,
RouteAPI = require('./lib/handlers/route-api');
// Parse arguments from command line 'node ./app.js args...'
const opts = nopt({
env: [String, Array],
rootDir: [String],
host: [String],
port: [Number],
propDebug: [Boolean],
debug: [Boolean],
dist: [Boolean],
archivedVersions: [String],
// Ignore fetch marks and assume every compiler is found locally
noRemoteFetch: [Boolean],
tmpDir: [String],
wsl: [Boolean],
// If specified, only loads the specified language, resulting in faster loadup/iteration times
language: [String],
// Do not use caching for compilation results (Requests might still be cached by the client's browser)
noCache: [Boolean],
// Don't cleanly run if two or more compilers have clashing ids
ensureNoIdClash: [Boolean],
logHost: [String],
logPort: [Number],
suppressConsoleLog: [Boolean],
});
if (opts.debug) logger.level = 'debug';
// AP: Detect if we're running under Windows Subsystem for Linux. Temporary modification
// of process.env is allowed: https://nodejs.org/api/process.html#process_process_env
if (process.platform === 'linux' && child_process.execSync('uname -a').toString().includes('Microsoft')) {
process.env.wsl = true;
}
// AP: Allow setting of tmpDir (used in lib/base-compiler.js & lib/exec.js) through opts.
// WSL requires a directory on a Windows volume. Set that to Windows %TEMP% if no tmpDir supplied.
// If a tempDir is supplied then assume that it will work for WSL processes as well.
if (opts.tmpDir) {
process.env.tmpDir = opts.tmpDir;
process.env.winTmp = opts.tmpDir;
} else if (process.env.wsl) {
// Dec 2017 preview builds of WSL include /bin/wslpath; do the parsing work for now.
// Parsing example %TEMP% is C:\Users\apardoe\AppData\Local\Temp
const windowsTemp = child_process.execSync('cmd.exe /c echo %TEMP%').toString().replace(/\\/g, '/');
const driveLetter = windowsTemp.substring(0, 1).toLowerCase();
const directoryPath = windowsTemp.substring(2).trim();
process.env.winTmp = path.join('/mnt', driveLetter, directoryPath);
}
const distPath = path.resolve(__dirname, 'out', 'dist');
const gitReleaseName = (() => {
// Use the canned git_hash if provided
const gitHashFilePath = path.join(distPath, 'git_hash');
if (opts.dist && fs.existsSync(gitHashFilePath)) {
return fs.readFileSync(gitHashFilePath).toString().trim();
}
// Just if we have been cloned and not downloaded (Thanks David!)
if (fs.existsSync('.git/')) {
return child_process.execSync('git rev-parse HEAD').toString().trim();
}
// unknown case
return '';
})();
const travisBuildNumber = (() => {
// Use the canned travis_build only if provided
const travisBuildPath = path.join(distPath, 'travis_build');
if (opts.dist && fs.existsSync(travisBuildPath)) {
return fs.readFileSync(travisBuildPath).toString().trim();
}
// non-travis build
return '';
})();
// Set default values for omitted arguments
const defArgs = {
rootDir: opts.rootDir || './etc',
env: opts.env || ['dev'],
hostname: opts.host,
port: opts.port || 10240,
gitReleaseName: gitReleaseName,
travisBuildNumber: travisBuildNumber,
wantedLanguage: opts.language || null,
doCache: !opts.noCache,
fetchCompilersFromRemote: !opts.noRemoteFetch,
ensureNoCompilerClash: opts.ensureNoIdClash,
suppressConsoleLog: opts.suppressConsoleLog || false,
};
if (opts.logHost && opts.logPort) {
logToPapertrail(opts.logHost, opts.logPort, defArgs.env.join('.'));
}
if (defArgs.suppressConsoleLog) {
logger.info('Disabling further console logging');
suppressConsoleLog();
}
const isDevMode = () => process.env.NODE_ENV !== 'production';
const propHierarchy = _.flatten([
'defaults',
defArgs.env,
_.map(defArgs.env, e => `${e}.${process.platform}`),
process.platform,
os.hostname(),
'local']);
logger.info(`properties hierarchy: ${propHierarchy.join(', ')}`);
// Propagate debug mode if need be
if (opts.propDebug) props.setDebug(true);
// *All* files in config dir are parsed
const configDir = path.join(defArgs.rootDir, 'config');
props.initialize(configDir, propHierarchy);
// Now load up our libraries.
const aws = require('./lib/aws'),
google = require('./lib/google');
// Instantiate a function to access records concerning "compiler-explorer"
// in hidden object props.properties
const ceProps = props.propsFor('compiler-explorer');
let languages = require('./lib/languages').list;
if (defArgs.wantedLanguage) {
const filteredLangs = {};
_.each(languages, lang => {
if (lang.id === defArgs.wantedLanguage ||
lang.name === defArgs.wantedLanguage ||
(lang.alias && lang.alias.includes(defArgs.wantedLanguage))) {
filteredLangs[lang.id] = lang;
}
});
languages = filteredLangs;
}
if (languages.length === 0) {
logger.error('Trying to start Compiler Explorer without a language');
}
const compilerProps = new props.CompilerProps(languages, ceProps);
const staticMaxAgeSecs = ceProps('staticMaxAgeSecs', 0);
const maxUploadSize = ceProps('maxUploadSize', '1mb');
const extraBodyClass = ceProps('extraBodyClass', isDevMode() ? 'dev' : '');
const storageSolution = compilerProps.ceProps('storageSolution', 'local');
const httpRoot = urljoin(ceProps('httpRoot', '/'), '/');
const staticUrl = ceProps('staticUrl');
const staticRoot = urljoin(staticUrl || urljoin(httpRoot, 'static'), '/');
function staticHeaders(res) {
if (staticMaxAgeSecs) {
res.setHeader('Cache-Control', 'public, max-age=' + staticMaxAgeSecs + ', must-revalidate');
}
}
const csp = require('./lib/csp').policy;
function contentPolicyHeader(res) {
// TODO: re-enable CSP
if (csp && 0) {
res.setHeader('Content-Security-Policy', csp);
}
}
function measureEventLoopLag(delayMs) {
return new Promise((resolve) => {
const start = process.hrtime.bigint();
setTimeout(() => {
const elapsed = process.hrtime.bigint() - start;
const delta = elapsed - BigInt(delayMs * 1000000);
return resolve(Number(delta) / 1000000);
}, delayMs);
});
}
function setupEventLoopLagLogging() {
const lagIntervalMs = ceProps('eventLoopMeasureIntervalMs', 0);
const thresWarn = ceProps('eventLoopLagThresholdWarn', 0);
const thresErr = ceProps('eventLoopLagThresholdErr', 0);
async function eventLoopLagHandler() {
const lagMs = await measureEventLoopLag(lagIntervalMs);
if (thresErr && lagMs >= thresErr) {
logger.error(`Event Loop Lag: ${lagMs} ms`);
} else if (thresWarn && lagMs >= thresWarn) {
logger.warn(`Event Loop Lag: ${lagMs} ms`);
}
setImmediate(eventLoopLagHandler);
}
if (lagIntervalMs > 0) {
setImmediate(eventLoopLagHandler);
}
}
let pugRequireHandler = () => {
logger.error('pug require handler not configured');
};
function setupWebPackDevMiddleware(router) {
logger.info(' using webpack dev middleware');
const webpackDevMiddleware = require('webpack-dev-middleware'),
// eslint-disable-next-line requirejs/no-js-extension
webpackConfig = require('./webpack.config.js'),
webpackCompiler = require('webpack')(webpackConfig);
router.use(webpackDevMiddleware(webpackCompiler, {
publicPath: '/static',
logger: logger,
}));
pugRequireHandler = (path) => urljoin(httpRoot, 'static', path);
}
function setupStaticMiddleware(router) {
const staticManifest = require(path.join(distPath, 'manifest.json'));
if (staticUrl) {
logger.info(` using static files from '${staticUrl}'`);
} else {
const staticPath = path.join(distPath, 'static');
logger.info(` serving static files from '${staticPath}'`);
router.use('/static', express.static(staticPath, {
maxAge: staticMaxAgeSecs * 1000,
}));
}
pugRequireHandler = (path) => {
if (Object.prototype.hasOwnProperty.call(staticManifest, path)) {
return urljoin(staticRoot, staticManifest[path]);
} else {
logger.error(`failed to locate static asset '${path}' in manifest`);
return '';
}
};
}
async function loadSources() {
const sourcesDir = 'lib/sources';
return (await fs.readdir(sourcesDir))
.filter(file => file.match(/.*\.js$/))
.map(file => require('./' + path.join(sourcesDir, file)));
}
function shouldRedactRequestData(data) {
try {
const parsed = JSON.parse(data);
return !parsed['allowStoreCodeDebug'];
} catch (e) {
return true;
}
}
const googleShortUrlResolver = new google.ShortLinkResolver();
function oldGoogleUrlHandler(req, res, next) {
const bits = req.url.split('/');
if (bits.length !== 2 || req.method !== 'GET') return next();
const googleUrl = `https://goo.gl/${encodeURIComponent(bits[1])}`;
googleShortUrlResolver.resolve(googleUrl)
.then(resultObj => {
const parsed = new url.URL(resultObj.longUrl);
const allowedRe = new RegExp(ceProps('allowedShortUrlHostRe'));
if (parsed.host.match(allowedRe) === null) {
logger.warn(`Denied access to short URL ${bits[1]} - linked to ${resultObj.longUrl}`);
return next();
}
res.writeHead(301, {
Location: resultObj.longUrl,
'Cache-Control': 'public',
});
res.end();
})
.catch(e => {
logger.error(`Failed to expand ${googleUrl} - ${e}`);
next();
});
}
function startListening(server) {
const ss = systemdSocket();
let _port;
if (ss) {
// ms (5 min default)
const idleTimeout = process.env.IDLE_TIMEOUT;
const timeout = (typeof idleTimeout !== 'undefined' ? idleTimeout : 300) * 1000;
if (idleTimeout) {
const exit = () => {
logger.info('Inactivity timeout reached, exiting.');
process.exit(0);
};
let idleTimer = setTimeout(exit, timeout);
const reset = () => {
clearTimeout(idleTimer);
idleTimer = setTimeout(exit, timeout);
};
server.all('*', reset);
logger.info(` IDLE_TIMEOUT: ${idleTimeout}`);
}
_port = ss;
} else {
_port = defArgs.port;
}
logger.info(` Listening on http://${defArgs.hostname || 'localhost'}:${_port}/`);
logger.info(` Startup duration: ${new Date() - startTime}ms`);
logger.info('=======================================');
server.listen(_port, defArgs.hostname);
}
function setupSentry(sentryDsn) {
if (!sentryDsn) {
logger.info('Not configuring sentry');
return;
}
const sentryEnv = ceProps('sentryEnvironment');
Sentry.init({
dsn: sentryDsn,
release: travisBuildNumber || gitReleaseName,
environment: sentryEnv || defArgs.env[0],
beforeSend(event) {
if (event.request
&& event.request.data
&& shouldRedactRequestData(event.request.data)) {
event.request.data = JSON.stringify({redacted: true});
}
return event;
},
});
logger.info(`Configured with Sentry endpoint ${sentryDsn}`);
}
const awsProps = props.propsFor('aws');
// eslint-disable-next-line max-statements
async function main() {
await aws.initConfig(awsProps);
await initialiseWine();
const fileSources = await loadSources();
const ClientOptionsHandler = require('./lib/options-handler');
const clientOptionsHandler = new ClientOptionsHandler(fileSources, compilerProps, defArgs);
const CompilationQueue = require('./lib/compilation-queue');
const compilationQueue = CompilationQueue.fromProps(compilerProps.ceProps);
const CompilationEnvironment = require('./lib/compilation-env');
const compilationEnvironment = new CompilationEnvironment(compilerProps, compilationQueue, defArgs.doCache);
const CompileHandler = require('./lib/handlers/compile').Handler;
const compileHandler = new CompileHandler(compilationEnvironment, awsProps);
const StorageHandler = require('./lib/storage/storage');
const storageHandler = StorageHandler.storageFactory(storageSolution, compilerProps, awsProps, httpRoot);
const SourceHandler = require('./lib/handlers/source').Handler;
const sourceHandler = new SourceHandler(fileSources, staticHeaders);
const CompilerFinder = require('./lib/compiler-finder');
const compilerFinder = new CompilerFinder(compileHandler, compilerProps, awsProps, defArgs, clientOptionsHandler);
const sponsors = require('./lib/sponsors');
logger.info('=======================================');
if (gitReleaseName) logger.info(` git release ${gitReleaseName}`);
if (travisBuildNumber) logger.info(` travis build ${travisBuildNumber}`);
const initialFindResults = await compilerFinder.find();
const initialCompilers = initialFindResults.compilers;
let prevCompilers;
if (defArgs.ensureNoCompilerClash) {
logger.warn('Ensuring no compiler ids clash');
if (initialFindResults.foundClash) {
// If we are forced to have no clashes, throw an error with some explanation
throw new Error('Clashing compilers in the current environment found!');
} else {
logger.info('No clashing ids found, continuing normally...');
}
}
setupSentry(aws.getConfig('sentryDsn'));
const webServer = express(),
sFavicon = require('serve-favicon'),
bodyParser = require('body-parser'),
morgan = require('morgan'),
compression = require('compression'),
router = express.Router(),
healthCheck = require('./lib/handlers/health-check');
const healthCheckFilePath = ceProps('healthCheckFilePath', false);
const routeApi = new RouteAPI(router, compileHandler, ceProps, storageHandler, renderGoldenLayout);
function onCompilerChange(compilers) {
if (JSON.stringify(prevCompilers) === JSON.stringify(compilers)) {
return;
}
logger.debug('Compilers:', compilers);
if (compilers.length === 0) {
logger.error('#### No compilers found: no compilation will be done!');
}
prevCompilers = compilers;
clientOptionsHandler.setCompilers(compilers);
routeApi.apiHandler.setCompilers(compilers);
routeApi.apiHandler.setLanguages(languages);
routeApi.apiHandler.setOptions(clientOptionsHandler);
}
onCompilerChange(initialCompilers);
const rescanCompilerSecs = ceProps('rescanCompilerSecs', 0);
if (rescanCompilerSecs) {
logger.info(`Rescanning compilers every ${rescanCompilerSecs} secs`);
setInterval(() => compilerFinder.find().then(result => onCompilerChange(result.compilers)),
rescanCompilerSecs * 1000);
}
const sentrySlowRequestMs = ceProps('sentrySlowRequestMs', 0);
webServer
.set('trust proxy', true)
.set('view engine', 'pug')
.on('error', err => logger.error('Caught error in web handler; continuing:', err))
// sentry request handler must be the first middleware on the app
.use(Sentry.Handlers.requestHandler())
// eslint-disable-next-line no-unused-vars
.use(responseTime((req, res, time) => {
if (sentrySlowRequestMs > 0 && time >= sentrySlowRequestMs) {
Sentry.withScope(scope => {
scope.setExtra('duration_ms', time);
Sentry.captureMessage('SlowRequest', 'warning');
});
}
}))
// Handle healthchecks at the root, as they're not expected from the outside world
.use('/healthcheck', new healthCheck.HealthCheckHandler(compilationQueue, healthCheckFilePath).handle)
.use(httpRoot, router)
.use((req, res, next) => {
next({status: 404, message: `page "${req.path}" could not be found`});
})
// sentry error handler must be the first error handling middleware
.use(Sentry.Handlers.errorHandler)
// eslint-disable-next-line no-unused-vars
.use((err, req, res, next) => {
const status =
err.status ||
err.statusCode ||
err.status_code ||
(err.output && err.output.statusCode) ||
500;
const message = err.message || 'Internal Server Error';
res.status(status);
res.render('error', renderConfig({error: {code: status, message: message}}));
});
const sponsorConfig = sponsors.loadFromString(fs.readFileSync(configDir + '/sponsors.yaml', 'utf-8'));
function renderConfig(extra, urlOptions) {
const urlOptionsAllowed = [
'readOnly', 'hideEditorToolbars',
];
const filteredUrlOptions = _.mapObject(
_.pick(urlOptions, urlOptionsAllowed),
val => utils.toProperty(val));
const allExtraOptions = _.extend({}, filteredUrlOptions, extra);
if (allExtraOptions.mobileViewer && allExtraOptions.config) {
const normalizer = require('./lib/clientstate-normalizer');
const clnormalizer = new normalizer.ClientStateNormalizer();
clnormalizer.fromGoldenLayout(allExtraOptions.config);
const clientstate = clnormalizer.normalized;
const glnormalizer = new normalizer.ClientStateGoldenifier();
allExtraOptions.slides = glnormalizer.generatePresentationModeMobileViewerSlides(clientstate);
}
const options = _.extend({}, allExtraOptions, clientOptionsHandler.get());
options.optionsHash = clientOptionsHandler.getHash();
options.compilerExplorerOptions = JSON.stringify(allExtraOptions);
options.extraBodyClass = options.embedded ? 'embedded' : extraBodyClass;
options.httpRoot = httpRoot;
options.staticRoot = staticRoot;
options.storageSolution = storageSolution;
options.require = pugRequireHandler;
options.sponsors = sponsorConfig;
return options;
}
function isMobileViewer(req) {
return req.header('CloudFront-Is-Mobile-Viewer') === 'true';
}
function renderGoldenLayout(config, metadata, req, res) {
staticHeaders(res);
contentPolicyHeader(res);
res.render('index', renderConfig({
embedded: false,
mobileViewer: isMobileViewer(req),
config: config,
metadata: metadata,
}, req.query));
}
const embeddedHandler = function (req, res) {
staticHeaders(res);
contentPolicyHeader(res);
res.render('embed', renderConfig({
embedded: true,
mobileViewer: isMobileViewer(req),
}, req.query));
};
if (isDevMode()) {
setupWebPackDevMiddleware(router);
} else {
setupStaticMiddleware(router);
}
morgan.token('gdpr_ip', req => utils.anonymizeIp(req.ip));
// Based on combined format, but: GDPR compliant IP, no timestamp & no unused fields for our usecase
const morganFormat = isDevMode() ? 'dev' : ':gdpr_ip ":method :url" :status';
const shortenerLib = require(`./lib/shortener-${clientOptionsHandler.options.urlShortenService}`);
const shortener = shortenerLib({storageHandler});
/*
* This is a workaround to make cross origin monaco web workers function
* in spite of the monaco webpack plugin hijacking the MonacoEnvironment global.
*
* see https://github.com/microsoft/monaco-editor-webpack-plugin/issues/42
*
* This workaround wouldn't be so bad, if it didn't _also_ rely on *another* bug to
* actually work.
*
* The webpack plugin incorrectly uses
* window.__webpack_public_path__
* when it should use
* __webpack_public_path__
*
* see https://github.com/microsoft/monaco-editor-webpack-plugin/pull/63
*
* We can leave __webpack_public_path__ with the correct value, which lets runtime chunk
* loading continue to function correctly.
*
* We can then set window.__webpack_public_path__ to the below handler, which lets us
* fabricate a worker on the fly.
*
* This is bad and I feel bad.
*
* This should no longer be needed, but is left here for safety because people with
* workers already installed from this url may still try to hit this page for some time
*
* TODO: remove this route in the future now that it is not needed
*/
router.get('/workers/:worker', (req, res) => {
staticHeaders(res);
res.set('Content-Type', 'application/javascript');
res.end(`importScripts('${urljoin(staticRoot, req.params.worker)}');`);
});
router
.use(morgan(morganFormat, {
stream: logger.stream,
// Skip for non errors (2xx, 3xx)
skip: (req, res) => res.statusCode >= 400,
}))
.use(morgan(morganFormat, {
stream: logger.warnStream,
// Skip for non user errors (4xx)
skip: (req, res) => res.statusCode < 400 || res.statusCode >= 500,
}))
.use(morgan(morganFormat, {
stream: logger.errStream,
// Skip for non server errors (5xx)
skip: (req, res) => res.statusCode < 500,
}))
.use(compression())
.get('/', (req, res) => {
staticHeaders(res);
contentPolicyHeader(res);
res.render('index', renderConfig({
embedded: false,
mobileViewer: isMobileViewer(req),
}, req.query));
})
.get('/e', embeddedHandler)
// legacy. not a 301 to prevent any redirect loops between old e links and embed.html
.get('/embed.html', embeddedHandler)
.get('/embed-ro', (req, res) => {
staticHeaders(res);
contentPolicyHeader(res);
res.render('embed', renderConfig({
embedded: true,
readOnly: true,
mobileViewer: isMobileViewer(req),
}, req.query));
})
.get('/robots.txt', (req, res) => {
staticHeaders(res);
res.end('User-agent: *\nSitemap: https://godbolt.org/sitemap.xml\nDisallow:');
})
.get('/sitemap.xml', (req, res) => {
staticHeaders(res);
res.set('Content-Type', 'application/xml');
res.render('sitemap');
})
.use(sFavicon(path.resolve(__dirname, 'static', 'favicon.ico')))
.get('/client-options.js', (req, res) => {
staticHeaders(res);
res.set('Content-Type', 'application/javascript');
const options = JSON.stringify(clientOptionsHandler.get());
res.end(`window.compilerExplorerOptions = ${options};`);
})
.use('/bits/:bits(\\w+).html', (req, res) => {
staticHeaders(res);
contentPolicyHeader(res);
res.render('bits/' + req.params.bits, renderConfig({
embedded: false,
mobileViewer: isMobileViewer(req),
}, req.query));
})
.use(bodyParser.json({limit: ceProps('bodyParserLimit', maxUploadSize)}))
.use(bodyParser.text({limit: ceProps('bodyParserLimit', maxUploadSize), type: () => true}))
.use('/source', sourceHandler.handle.bind(sourceHandler))
.use('/g', oldGoogleUrlHandler)
.post('/shortener', shortener);
routeApi.InitializeRoutes();
if (!defArgs.doCache) {
logger.info(' with disabled caching');
}
setupEventLoopLagLogging();
startListening(webServer);
}
main()
.then(() => {
})
.catch(err => {
logger.error('Top-level error (shutting down):', err);
process.exit(1);
});