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index.js
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index.js
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'use strict';
var async = require('async');
var path = require('path');
var csrf = require('csurf');
var validator = require('validator');
var nconf = require('nconf');
var ensureLoggedIn = require('connect-ensure-login');
var toobusy = require('toobusy-js');
var LRU = require('lru-cache');
var util = require('util');
var plugins = require('../plugins');
var meta = require('../meta');
var user = require('../user');
var groups = require('../groups');
var analytics = require('../analytics');
var privileges = require('../privileges');
var helpers = require('./helpers');
var controllers = {
api: require('../controllers/api'),
helpers: require('../controllers/helpers'),
};
var delayCache = new LRU({
maxAge: 1000 * 60,
});
var middleware = module.exports;
middleware.regexes = {
timestampedUpload: /^\d+-.+$/,
};
const csurfMiddleware = csrf({
cookie: nconf.get('url_parsed').protocol === 'https:' ? {
secure: true,
sameSite: 'Strict',
httpOnly: true,
} : true,
});
middleware.applyCSRF = function (req, res, next) {
if (req.uid >= 0) {
csurfMiddleware(req, res, next);
} else {
next();
}
};
middleware.ensureLoggedIn = ensureLoggedIn.ensureLoggedIn(nconf.get('relative_path') + '/login');
Object.assign(middleware, {
admin: require('./admin'),
...require('./header'),
});
require('./render')(middleware);
require('./maintenance')(middleware);
require('./user')(middleware);
require('./headers')(middleware);
require('./expose')(middleware);
middleware.stripLeadingSlashes = function stripLeadingSlashes(req, res, next) {
var target = req.originalUrl.replace(nconf.get('relative_path'), '');
if (target.startsWith('//')) {
return res.redirect(nconf.get('relative_path') + target.replace(/^\/+/, '/'));
}
next();
};
middleware.pageView = helpers.try(async function pageView(req, res, next) {
const promises = [
analytics.pageView({ ip: req.ip, uid: req.uid }),
];
if (req.loggedIn) {
promises.push(user.updateOnlineUsers(req.uid));
promises.push(user.updateLastOnlineTime(req.uid));
}
await Promise.all(promises);
plugins.fireHook('action:middleware.pageView', { req: req });
next();
});
middleware.pluginHooks = helpers.try(async function pluginHooks(req, res, next) {
// TODO: Deprecate in v2.0
await async.each(plugins.loadedHooks['filter:router.page'] || [], function (hookObj, next) {
hookObj.method(req, res, next);
});
await plugins.fireHook('response:router.page', {
req: req,
res: res,
});
if (!res.headersSent) {
next();
}
});
middleware.validateFiles = function validateFiles(req, res, next) {
if (!Array.isArray(req.files.files) || !req.files.files.length) {
return next(new Error(['[[error:invalid-files]]']));
}
next();
};
middleware.prepareAPI = function prepareAPI(req, res, next) {
res.locals.isAPI = true;
next();
};
middleware.routeTouchIcon = function routeTouchIcon(req, res) {
if (meta.config['brand:touchIcon'] && validator.isURL(meta.config['brand:touchIcon'])) {
return res.redirect(meta.config['brand:touchIcon']);
}
var iconPath = '';
if (meta.config['brand:touchIcon']) {
iconPath = path.join(nconf.get('upload_path'), meta.config['brand:touchIcon'].replace(/assets\/uploads/, ''));
} else {
iconPath = path.join(nconf.get('base_dir'), 'public/logo.png');
}
return res.sendFile(iconPath, {
maxAge: req.app.enabled('cache') ? 5184000000 : 0,
});
};
middleware.privateTagListing = helpers.try(async function privateTagListing(req, res, next) {
const canView = await privileges.global.can('view:tags', req.uid);
if (!canView) {
return controllers.helpers.notAllowed(req, res);
}
next();
});
middleware.exposeGroupName = helpers.try(async function exposeGroupName(req, res, next) {
await expose('groupName', groups.getGroupNameByGroupSlug, 'slug', req, res, next);
});
middleware.exposeUid = helpers.try(async function exposeUid(req, res, next) {
await expose('uid', user.getUidByUserslug, 'userslug', req, res, next);
});
async function expose(exposedField, method, field, req, res, next) {
if (!req.params.hasOwnProperty(field)) {
return next();
}
res.locals[exposedField] = await method(req.params[field]);
next();
}
middleware.privateUploads = function privateUploads(req, res, next) {
if (req.loggedIn || !meta.config.privateUploads) {
return next();
}
if (req.path.startsWith(nconf.get('relative_path') + '/assets/uploads/files')) {
var extensions = (meta.config.privateUploadsExtensions || '').split(',').filter(Boolean);
var ext = path.extname(req.path);
ext = ext ? ext.replace(/^\./, '') : ext;
if (!extensions.length || extensions.includes(ext)) {
return res.status(403).json('not-allowed');
}
}
next();
};
middleware.busyCheck = function busyCheck(req, res, next) {
if (global.env === 'production' && meta.config.eventLoopCheckEnabled && toobusy()) {
analytics.increment('errors:503');
res.status(503).type('text/html').sendFile(path.join(__dirname, '../../public/503.html'));
} else {
setImmediate(next);
}
};
middleware.applyBlacklist = async function applyBlacklist(req, res, next) {
try {
await meta.blacklist.test(req.ip);
next();
} catch (err) {
next(err);
}
};
middleware.delayLoading = function delayLoading(req, res, next) {
// Introduces an artificial delay during load so that brute force attacks are effectively mitigated
// Add IP to cache so if too many requests are made, subsequent requests are blocked for a minute
var timesSeen = delayCache.get(req.ip) || 0;
if (timesSeen > 10) {
return res.sendStatus(429);
}
delayCache.set(req.ip, timesSeen += 1);
setTimeout(next, 1000);
};
middleware.buildSkinAsset = helpers.try(async function buildSkinAsset(req, res, next) {
// If this middleware is reached, a skin was requested, so it is built on-demand
const target = path.basename(req.originalUrl).match(/(client-[a-z]+)/);
if (!target) {
return next();
}
await plugins.prepareForBuild(['client side styles']);
const buildBundle = util.promisify(meta.css.buildBundle);
const css = await buildBundle(target[0], true);
require('../meta/minifier').killAll();
res.status(200).type('text/css').send(css);
});
middleware.trimUploadTimestamps = function trimUploadTimestamps(req, res, next) {
// Check match
let basename = path.basename(req.path);
if (req.path.startsWith('/uploads/files/') && middleware.regexes.timestampedUpload.test(basename)) {
basename = basename.slice(14);
res.header('Content-Disposition', 'inline; filename="' + basename + '"');
}
next();
};
middleware.validateAuth = helpers.try(async function validateAuth(req, res, next) {
try {
await plugins.fireHook('static:auth.validate', {
user: res.locals.user,
strategy: res.locals.strategy,
});
next();
} catch (err) {
const regenerateSession = util.promisify(cb => req.session.regenerate(cb));
await regenerateSession();
req.uid = 0;
req.loggedIn = false;
next(err);
}
});
middleware.checkRequired = function (fields, req, res, next) {
// Used in API calls to ensure that necessary parameters/data values are present
const missing = fields.filter(field => !req.body.hasOwnProperty(field));
if (!missing.length) {
return next();
}
controllers.helpers.formatApiResponse(400, res, new Error('Required parameters were missing from this API call: ' + missing.join(', ')));
};