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87 lines
2.8 KiB
87 lines
2.8 KiB
'use strict';
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const { Bypass } = require(__dirname+'/../../db/')
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, { ObjectId } = require(__dirname+'/../../db/db.js')
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, config = require(__dirname+'/../../config.js')
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, deleteTempFiles = require(__dirname+'/../files/deletetempfiles.js')
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, dynamicResponse = require(__dirname+'/../dynamic.js')
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, production = process.env.NODE_ENV === 'production';
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module.exports = {
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check: async (req, res, next) => {
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const { secureCookies, blockBypass } = config.get;
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//check if blockbypass exists and right length
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const bypassId = req.signedCookies.bypassid;
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if (!res.locals.solvedCaptcha && (!bypassId || bypassId.length !== 24)) {
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deleteTempFiles(req).catch(e => console.error);
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return dynamicResponse(req, res, 403, 'message', {
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'title': 'Forbidden',
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'message': 'Please complete a block bypass to continue',
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'frame': '/bypass_minimal.html',
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'link': {
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'href': '/bypass.html',
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'text': 'Get block bypass',
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},
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});
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}
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//try to get bypass from db and make sure uses < maxUses
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let bypass;
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if (bypassId && bypassId.length === 24) {
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try {
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const bypassMongoId = ObjectId(bypassId);
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bypass = await Bypass.checkBypass(bypassMongoId, res.locals.anonymizer);
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res.locals.blockBypass = true;
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} catch (err) {
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return next(err);
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}
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}
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if (bypass //if they have a valid bypass
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&& (bypass.uses < blockBypass.expireAfterUses //and its not overused
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|| (res.locals.anonymizer
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&& !blockBypass.forceAnonymizers))) { //OR its not forced for anonymizers
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return next();
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}
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if (res.locals.solvedCaptcha) {
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//they dont have a valid bypass, but just solved board captcha, so give them a new one
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const newBypass = await Bypass.getBypass(res.locals.anonymizer);
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const newBypassId = newBypass.insertedId;
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res.locals.blockBypass = true;
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res.cookie('bypassid', newBypassId.toString(), {
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'maxAge': blockBypass.expireAfterTime,
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'secure': production && secureCookies && (req.headers['x-forwarded-proto'] === 'https'),
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'sameSite': 'strict',
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'signed': true
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});
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return next();
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}
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deleteTempFiles(req).catch(e => console.error);
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return dynamicResponse(req, res, 403, 'message', {
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'title': 'Forbidden',
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'message': 'Block bypass expired or exceeded max uses',
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'frame': '/bypass_minimal.html',
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'link': {
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'href': '/bypass.html',
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'text': 'Get block bypass',
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},
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});
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},
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middleware: async (req, res, next) => {
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const { blockBypass } = config.get;
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if (res.locals.preFetchedBypassId //if they already have a bypass
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|| (!blockBypass.enabled //or if block bypass isnt enabled
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&& (!blockBypass.forceAnonymizers //and we dont force it for anonymizer
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|| !res.locals.anonymizer))) { //or they arent on an anonymizer
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return next();
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}
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return module.exports.check(req, res, next);
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},
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}
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