blob: 459a420f6b2112ce1e8527b66ed15cf2a2935e7d [file] [log] [blame] [raw]
#!/usr/bin/env node
// Copyright (c) 2012-2018, 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.
// 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'),
fs = require('fs-extra'),
http = require('http'),
url = require('url'),
_ = require('underscore-node'),
express = require('express'),
Raven = require('raven'),
logger = require('./lib/logger').logger,
webpackDevMiddleware = require("webpack-dev-middleware");
// 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],
'static': [String],
'archivedVersions': [String],
'noRemoteFetch': [Boolean],
'tmpDir': [String],
'wsl': [Boolean],
'language': [String]
});
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 === "win32") || child_process.execSync('uname -a').toString().indexOf('Microsoft') > -1)
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);
}
// Set default values for omitted arguments
const rootDir = opts.rootDir || './etc';
const env = opts.env || ['dev'];
const hostname = opts.host;
const port = opts.port || 10240;
const staticDir = opts.static || 'static';
const archivedVersions = opts.archivedVersions;
let gitReleaseName = "";
const wantedLanguage = opts.language || null;
const webpackConfig = require('./webpack.config.js')[1],
webpackCompiler = require('webpack')(webpackConfig),
manifestName = 'manifest.json',
staticManifestPath = path.join(__dirname, staticDir, webpackConfig.output.publicPath),
assetManifestPath = path.join(staticManifestPath, 'assets'),
staticManifest = require(path.join(staticManifestPath, manifestName)),
assetManifest = require(path.join(assetManifestPath, manifestName));
// Use the canned git_hash if provided
if (opts.static && fs.existsSync(opts.static + "/git_hash")) {
gitReleaseName = fs.readFileSync(opts.static + "/git_hash").toString().trim();
} else if (fs.existsSync('.git/')) { // Just if we have been cloned and not downloaded (Thanks David!)
gitReleaseName = child_process.execSync('git rev-parse HEAD').toString().trim();
}
// Don't treat @ in paths as remote adresses
const fetchCompilersFromRemote = !opts.noRemoteFetch;
const isDevMode = () => process.env.NODE_ENV === "DEV";
const propHierarchy = _.flatten([
'defaults',
env,
_.map(env, function (e) {
return 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
props.initialize(rootDir + '/config', 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 (wantedLanguage) {
const filteredLangs = {};
_.each(languages, lang => {
if (lang.id === wantedLanguage ||
lang.name === wantedLanguage ||
(lang.alias && lang.alias.indexOf(wantedLanguage) >= 0)) {
filteredLangs[lang.id] = lang;
}
});
languages = filteredLangs;
}
if (languages.length === 0) {
logger.error("Trying to start Compiler Explorer without a language");
}
// Instantiate a function to access records concerning the chosen language
// in hidden object props.properties
let compilerPropsFuncsL = {};
_.each(languages, lang => compilerPropsFuncsL[lang.id] = props.propsFor(lang.id));
// Get a property from the specified langId, and if not found, use defaults from CE,
// and at last return whatever default value was set by the caller
function compilerPropsL(lang, property, defaultValue) {
const forLanguage = compilerPropsFuncsL[lang];
if (forLanguage) {
const forCompiler = forLanguage(property);
if (forCompiler !== undefined) return forCompiler;
}
return ceProps(property, defaultValue);
}
// For every lang passed, get its corresponding compiler property
function compilerPropsA(langs, property, defaultValue) {
let forLanguages = {};
_.each(langs, lang => {
forLanguages[lang.id] = compilerPropsL(lang.id, property, defaultValue);
});
return forLanguages;
}
// Same as A version, but transfroms each value by fn(original, lang)
function compilerPropsAT(langs, transform, property, defaultValue) {
let forLanguages = {};
_.each(langs, lang => {
forLanguages[lang.id] = transform(compilerPropsL(lang.id, property, defaultValue), lang);
});
return forLanguages;
}
const staticMaxAgeSecs = ceProps('staticMaxAgeSecs', 0);
const contentPolicy = ceProps('contentPolicy', 'default-src *');
const maxUploadSize = ceProps('maxUploadSize', '1mb');
let extraBodyClass = ceProps('extraBodyClass', '');
function staticHeaders(res) {
if (staticMaxAgeSecs) {
res.setHeader('Cache-Control', 'public, max-age=' + staticMaxAgeSecs + ', must-revalidate');
}
}
const csp = require('./lib/csp').policy;
function contentPolicyHeader(res) {
if (csp) {
res.setHeader('Content-Security-Policy-Report-Only', csp);
}
}
const awsProps = props.propsFor("aws");
let awsPoller = null;
function awsInstances() {
if (!awsPoller) awsPoller = new aws.InstanceFetcher(awsProps);
return awsPoller.getInstances();
}
// function to load internal binaries (i.e. lib/source/*.js)
function loadSources() {
const sourcesDir = "lib/sources";
return fs.readdirSync(sourcesDir)
.filter(function (file) {
return file.match(/.*\.js$/);
})
.map(function (file) {
return require("./" + path.join(sourcesDir, file));
});
}
const fileSources = loadSources();
const clientOptionsHandler = new ClientOptionsHandler(fileSources);
const CompileHandler = require('./lib/handlers/compile').Handler;
const compileHandler = new CompileHandler(ceProps, compilerPropsL);
const ApiHandler = require('./lib/handlers/api').Handler;
const apiHandler = new ApiHandler(compileHandler);
const SourceHandler = require('./lib/handlers/source').Handler;
const sourceHandler = new SourceHandler(fileSources, staticHeaders);
function ClientOptionsHandler(fileSources) {
const sources = _.sortBy(fileSources.map(source => {
return {name: source.name, urlpart: source.urlpart};
}), 'name');
const supportsBinary = compilerPropsAT(languages, res => !!res, 'supportsBinary', true);
const supportsExecutePerLanguage = compilerPropsAT(languages, (res, lang) => supportsBinary[lang.id] && !!res, 'supportsExecute', true);
const supportsExecute = Object.values(supportsExecutePerLanguage).some((value) => value);
const libs = {};
const baseLibs = compilerPropsA(languages, 'libs');
_.each(baseLibs, (forLang, lang) => {
if (lang && forLang) {
libs[lang] = {};
_.each(forLang.split(':'), lib => {
const libBaseName = `libs.${lib}`;
libs[lang][lib] = {
name: compilerPropsL(lang, libBaseName + '.name'),
url: compilerPropsL(lang, libBaseName + '.url')
};
libs[lang][lib].versions = {};
const listedVersions = compilerPropsL(lang, libBaseName + '.versions');
if (listedVersions) {
_.each(listedVersions.split(':'), version => {
const libVersionName = libBaseName + `.versions.${version}`;
libs[lang][lib].versions[version] = {};
libs[lang][lib].versions[version].version = compilerPropsL(lang, libVersionName + '.version');
libs[lang][lib].versions[version].path = [];
const includes = compilerPropsL(lang, libVersionName + '.path');
if (includes) {
_.each(includes.split(':'), path => libs[lang][lib].versions[version].path.push(path));
} else {
logger.warn(`No paths found for ${lib} - ${version}`);
}
});
} else {
logger.warn(`No versions found for ${lib} library`);
}
});
}
});
const options = {
googleAnalyticsAccount: ceProps('clientGoogleAnalyticsAccount', 'UA-55180-6'),
googleAnalyticsEnabled: ceProps('clientGoogleAnalyticsEnabled', false),
sharingEnabled: ceProps('clientSharingEnabled', true),
githubEnabled: ceProps('clientGitHubRibbonEnabled', true),
gapiKey: ceProps('googleApiKey', ''),
googleShortLinkRewrite: ceProps('googleShortLinkRewrite', '').split('|'),
defaultSource: ceProps('defaultSource', ''),
compilers: [],
libs: libs,
defaultCompiler: compilerPropsA(languages, 'defaultCompiler', ''),
compileOptions: compilerPropsA(languages, 'defaultOptions', ''),
supportsBinary: supportsBinary,
supportsExecute: supportsExecute,
languages: languages,
sources: sources,
raven: ceProps('ravenUrl', ''),
release: gitReleaseName,
environment: env,
localStoragePrefix: ceProps('localStoragePrefix'),
cvCompilerCountMax: ceProps('cvCompilerCountMax', 6),
defaultFontScale: ceProps('defaultFontScale', 1.0)
};
this.setCompilers = compilers => options.compilers = compilers;
this.setCompilers([]);
this.get = () => options;
}
function retryPromise(promiseFunc, name, maxFails, retryMs) {
return new Promise(function (resolve, reject) {
let fails = 0;
function doit() {
const promise = promiseFunc();
promise.then(function (arg) {
resolve(arg);
}, function (e) {
fails++;
if (fails < maxFails) {
logger.warn(`Failed ${name} : ${e}, retrying`);
setTimeout(doit, retryMs);
} else {
logger.error(`Too many retries for ${name} : ${e}`);
reject(e);
}
});
}
doit();
});
}
function findCompilers() {
const exes = compilerPropsAT(languages, exs => _.compact(exs.split(":")), "compilers", "");
const ndk = compilerPropsA(languages, 'androidNdk');
_.each(ndk, (ndkPath, langId) => {
if (ndkPath) {
let toolchains = fs.readdirSync(`${ndkPath}/toolchains`);
toolchains.forEach((version, index, a) => {
const path = `${ndkPath}/toolchains/${version}/prebuilt/linux-x86_64/bin/`;
if (fs.existsSync(path)) {
const cc = fs.readdirSync(path).filter(filename => filename.indexOf("g++") !== -1);
a[index] = path + cc[0];
} else {
a[index] = null;
}
});
toolchains = toolchains.filter(x => x !== null);
exes[langId].push(toolchains);
}
});
function fetchRemote(host, port, props) {
logger.info(`Fetching compilers from remote source ${host}:${port}`);
return retryPromise(() => {
return new Promise((resolve, reject) => {
let request = http.get({
hostname: host,
port: port,
path: "/api/compilers",
headers: {
'Accept': 'application/json'
}
}, res => {
let str = '';
res.on('data', chunk => {
str += chunk;
});
res.on('end', () => {
let compilers = JSON.parse(str).map(compiler => {
compiler.exe = null;
compiler.remote = `http://${host}:${port}`;
return compiler;
});
resolve(compilers);
});
})
.on('error', reject)
.on('timeout', () => reject("timeout"));
request.setTimeout(awsProps('proxyTimeout', 1000));
});
},
`${host}:${port}`,
props('proxyRetries', 5),
props('proxyRetryMs', 500))
.catch(() => {
logger.warn(`Unable to contact ${host}:${port}; skipping`);
return [];
});
}
function fetchAws() {
logger.info("Fetching instances from AWS");
return awsInstances().then(instances => {
return Promise.all(instances.map(instance => {
logger.info("Checking instance " + instance.InstanceId);
let address = instance.PrivateDnsName;
if (awsProps("externalTestMode", false)) {
address = instance.PublicDnsName;
}
return fetchRemote(address, port, awsProps);
}));
});
}
function compilerConfigFor(langId, compilerName, parentProps) {
const base = `compiler.${compilerName}.`;
function props(propName, def) {
let propsForCompiler = parentProps(langId, base + propName, undefined);
if (propsForCompiler === undefined) {
propsForCompiler = parentProps(langId, propName, def);
}
return propsForCompiler;
}
const supportsBinary = !!props("supportsBinary", true);
const supportsExecute = supportsBinary && !!props("supportsExecute", true);
const group = props("group", "");
const compilerInfo = {
id: compilerName,
exe: props("exe", compilerName),
name: props("name", compilerName),
alias: props("alias"),
options: props("options"),
versionFlag: props("versionFlag"),
versionRe: props("versionRe"),
compilerType: props("compilerType", ""),
demangler: props("demangler", ""),
objdumper: props("objdumper", ""),
intelAsm: props("intelAsm", ""),
needsMulti: !!props("needsMulti", true),
supportsBinary: supportsBinary,
supportsExecute: supportsExecute,
postProcess: props("postProcess", "").split("|"),
lang: langId,
group: group,
groupName: props("groupName", "")
};
logger.debug("Found compiler", compilerInfo);
return Promise.resolve(compilerInfo);
}
function recurseGetCompilers(langId, compilerName, parentProps) {
if (fetchCompilersFromRemote && compilerName.indexOf("@") !== -1) {
const bits = compilerName.split("@");
const host = bits[0];
const port = parseInt(bits[1]);
return fetchRemote(host, port, ceProps);
}
if (compilerName.indexOf("&") === 0) {
const groupName = compilerName.substr(1);
const props = function (langId, propName, def) {
if (propName === "group") {
return groupName;
}
return compilerPropsL(langId, `group.${groupName}.${propName}`, parentProps(langId, propName, def));
};
const compilerExes = _.compact(props(langId, 'compilers', '').split(":"));
logger.debug("Processing compilers from group " + groupName);
return Promise.all(compilerExes.map(compiler => recurseGetCompilers(langId, compiler, props)));
}
if (compilerName === "AWS") return fetchAws();
return compilerConfigFor(langId, compilerName, parentProps);
}
function getCompilers() {
let compilers = [];
_.each(exes, (exs, langId) => {
_.each(exs, exe => compilers.push(recurseGetCompilers(langId, exe, compilerPropsL)));
});
return compilers;
}
function ensureDistinct(compilers) {
let ids = {};
_.each(compilers, compiler => {
if (!ids[compiler.id]) ids[compiler.id] = [];
ids[compiler.id].push(compiler);
});
_.each(ids, (list, id) => {
if (list.length !== 1) {
logger.error(`Compiler ID clash for '${id}' - used by ${
_.map(list, o => `lang:${o.lang} name:${o.name}`).join(', ')
}`);
}
});
return compilers;
}
return Promise.all(getCompilers())
.then(_.flatten)
.then(compilers => compileHandler.setCompilers(compilers))
.then(compilers => _.compact(compilers))
.then(ensureDistinct)
.then(compilers => _.sortBy(compilers, "name"));
}
function shortUrlHandler(req, res, next) {
const resolver = new google.ShortLinkResolver(aws.getConfig('googleApiKey'));
const bits = req.url.split("/");
if (bits.length !== 2 || req.method !== "GET") return next();
const googleUrl = `http://goo.gl/${encodeURIComponent(bits[1])}`;
resolver.resolve(googleUrl)
.then(resultObj => {
const parsed = url.parse(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.id,
'Cache-Control': 'public'
});
res.end();
})
.catch(e => {
logger.error(`Failed to expand ${googleUrl} - ${e}`);
next();
});
}
Promise.all([findCompilers(), aws.initConfig(awsProps)])
.then(args => {
let compilers = args[0];
let prevCompilers;
const ravenPrivateEndpoint = aws.getConfig('ravenPrivateEndpoint');
if (ravenPrivateEndpoint) {
Raven.config(ravenPrivateEndpoint, {
release: gitReleaseName,
environment: env
}).install();
logger.info("Configured with raven endpoint", ravenPrivateEndpoint);
} else {
Raven.config(false).install();
}
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);
apiHandler.setCompilers(compilers);
apiHandler.setLanguages(languages);
}
onCompilerChange(compilers);
const rescanCompilerSecs = ceProps('rescanCompilerSecs', 0);
if (rescanCompilerSecs) {
logger.info(`Rescanning compilers every ${rescanCompilerSecs} secs`);
setInterval(() => findCompilers().then(onCompilerChange),
rescanCompilerSecs * 1000);
}
const webServer = express(),
sFavicon = require('serve-favicon'),
bodyParser = require('body-parser'),
morgan = require('morgan'),
compression = require('compression'),
restreamer = require('./lib/restreamer');
logger.info("=======================================");
logger.info(`Listening on http://${hostname || 'localhost'}:${port}/`);
if (gitReleaseName) logger.info(` git release ${gitReleaseName}`);
function renderConfig(extra) {
const options = _.extend(extra, clientOptionsHandler.get());
options.compilerExplorerOptions = JSON.stringify(options);
options.extraBodyClass = extraBodyClass;
options.require = function (path) {
if (isDevMode()) {
//I have no idea why main => maps to styles i need to dig into this
if (path === 'main.css') {
return '/dist/styles.css';
}
//this will break assets in dev mode for now
return '/dist/' + path;
}
if(staticManifest.hasOwnProperty(path)) {
return "dist/" + staticManifest[path];
}
if(assetManifest.hasOwnProperty(path)) {
return "dist/assets/" + assetManifest[path];
}
logger.warn("Requested an asset I don't know about");
};
return options;
}
const embeddedHandler = function (req, res) {
staticHeaders(res);
contentPolicyHeader(res);
res.render('embed', renderConfig({embedded: true}));
};
const healthCheck = require('./lib/handlers/health-check');
if (isDevMode()) {
webServer.use(webpackDevMiddleware(webpackCompiler, {
publicPath: webpackConfig.output.publicPath
}));
webServer.use(express.static(staticDir));
} else {
//assume that anything not dev is just production this gives sane defaults for anyone who isn't messing with this
logger.info(" serving static files from '" + staticDir + "'");
webServer.use(express.static(staticDir, {maxAge: staticMaxAgeSecs * 1000}));
}
webServer
.use(Raven.requestHandler())
.set('trust proxy', true)
.set('view engine', 'pug')
.use('/healthcheck', new healthCheck.HealthCheckHandler().handle) // before morgan so healthchecks aren't logged
.use(morgan('combined', {stream: logger.stream}))
.use(compression())
.get('/', (req, res) => {
staticHeaders(res);
contentPolicyHeader(res);
res.render('index', renderConfig({embedded: false}));
})
.get('/e', embeddedHandler)
.get('/embed.html', embeddedHandler) // legacy. not a 301 to prevent any redirect loops between old e links and embed.html
.get('/embed-ro', (req, res) => {
staticHeaders(res);
contentPolicyHeader(res);
res.render('embed', renderConfig({embedded: true, readOnly: true}));
})
.get('/robots.txt', (req, res) => {
staticHeaders(res);
res.end('User-agent: *\nSitemap: https://godbolt.org/sitemap.xml');
})
.get('/sitemap.xml', (req, res) => {
staticHeaders(res);
res.set('Content-Type', 'application/xml');
res.render('sitemap');
})
.use(sFavicon(path.join(staticDir, webpackConfig.output.publicPath, 'favicon.ico')));
webServer
.use(bodyParser.json({limit: ceProps('bodyParserLimit', maxUploadSize)}))
.use(bodyParser.text({limit: ceProps('bodyParserLimit', maxUploadSize), type: () => true}))
.use(restreamer())
.use('/source', sourceHandler.handle.bind(sourceHandler))
.use('/api', apiHandler.handle)
.use('/g', shortUrlHandler);
logger.info("=======================================");
webServer.use(Raven.errorHandler());
webServer.on('error', err => logger.error('Caught error:', err, "(in web error handler; continuing)"));
webServer.listen(port, hostname);
})
.catch(err => {
logger.error("Promise error:", err, "(shutting down)");
process.exit(1);
});