teddit-reddit-frontend-alte.../routes/overides.js

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2021-09-02 11:23:58 +02:00
const config = require('../config');
const overridingRoutes = require('express').Router();
overridingRoutes.all('*', (req, res, next) => {
let themeOverride = req.query.theme;
if (themeOverride) {
// Convert Dark to dark since the stylesheet has it lower case
themeOverride = themeOverride.toLowerCase();
// This override here will set it for the current request
req.cookies.theme = themeOverride;
// this will set it for future requests
res.cookie('theme', themeOverride, { maxAge: 31536000, httpOnly: true });
} else if (!req.cookies.theme && req.cookies.theme !== '') {
req.cookies.theme = config.theme;
}
let flairsOverride = req.query.flairs;
if (flairsOverride) {
req.cookies.flairs = flairsOverride;
res.cookie('flairs', flairsOverride, { maxAge: 31536000, httpOnly: true });
}
let nsfwEnabledOverride = req.query.nsfw_enabled;
if (nsfwEnabledOverride) {
req.cookies.nsfw_enabled = nsfwEnabledOverride;
res.cookie('nsfw_enabled', nsfwEnabledOverride, {
maxAge: 31536000,
httpOnly: true,
});
}
let highlightControversialOverride = req.query.highlight_controversial;
if (highlightControversialOverride) {
req.cookies.highlight_controversial = highlightControversialOverride;
res.cookie('highlight_controversial', highlightControversialOverride, {
maxAge: 31536000,
httpOnly: true,
});
}
let postMediaMaxHeight = req.query.post_media_max_height;
if (postMediaMaxHeight) {
if (
config.post_media_max_heights.hasOwnProperty(postMediaMaxHeight) ||
!isNaN(postMediaMaxHeight)
) {
req.cookies.post_media_max_height = postMediaMaxHeight;
res.cookie('post_media_max_height', postMediaMaxHeight, {
maxAge: 31536000,
httpOnly: true,
});
}
}
let collapseChildComments = req.query.collapse_child_comments;
if (collapseChildComments) {
req.cookies.collapse_child_comments = collapseChildComments;
res.cookie('collapse_child_comments', collapseChildComments, {
maxAge: 31536000,
httpOnly: true,
});
}
let showUpvotedPercentage = req.query.show_upvoted_percentage;
if (showUpvotedPercentage) {
req.cookies.show_upvoted_percentage = showUpvotedPercentage;
res.cookie('show_upvoted_percentage', showUpvotedPercentage, {
maxAge: 31536000,
httpOnly: true,
});
}
let domainTwitter = req.query.domain_twitter;
if (domainTwitter) {
req.cookies.domain_twitter = domainTwitter;
res.cookie('domain_twitter', domainTwitter, {
maxAge: 31536000,
httpOnly: true,
});
}
let domainYoutube = req.query.domain_youtube;
if (domainYoutube) {
req.cookies.domain_youtube = domainYoutube;
res.cookie('domain_youtube', domainYoutube, {
maxAge: 31536000,
httpOnly: true,
});
}
let domainInstagram = req.query.domain_instagram;
if (domainInstagram) {
req.cookies.domain_instagram = domainInstagram;
res.cookie('domain_instagram', domainInstagram, {
maxAge: 31536000,
httpOnly: true,
});
}
let videosMuted = req.query.videos_muted;
if (videosMuted) {
req.cookies.videos_muted = videosMuted;
res.cookie('videos_muted', videosMuted, {
maxAge: 31536000,
httpOnly: true,
});
}
if (!config.rate_limiting) {
return next();
}
const valid_reddit_starts = [
'/https://old.reddit.com',
'/https://reddit.com',
'/https://www.reddit.com',
'/old.reddit.com',
'/reddit.com',
'/www.reddit.com',
];
for (var i = 0; i < valid_reddit_starts.length; i++) {
if (req.url.startsWith(valid_reddit_starts[i])) {
req.url = req.url.substring(1);
const redditRegex = /([A-z.]+\.)?(reddit(\.com))/gm;
let teddified_url = req.url.replace(redditRegex, '');
if (teddified_url.includes('://')) {
teddified_url = teddified_url.split('://')[1];
}
if (teddified_url == '') {
teddified_url = '/';
}
return res.redirect(teddified_url);
}
}
if (config.rate_limiting.enabled) {
/**
* This route enforces request limits based on an IP address if
* config.rate_limiting.enabled is true. By default it's false.
*/
let ip = String(
req.headers['x-forwarded-for'] ||
req.connection.remoteAddress ||
'unknown'
);
if (ip === 'unknown') {
return next();
}
if (ratelimit_counts[ip] == undefined) {
ratelimit_counts[ip] = 0;
}
if (ratelimit_timestamps[ip] == undefined) {
ratelimit_timestamps[ip] = Date.now();
}
let diff = Date.now() - ratelimit_timestamps[ip];
let credit = (diff / 60000) * config.rate_limiting.limit_after_limited;
ratelimit_counts[ip] -= credit;
if (ratelimit_counts[ip] < 0) {
ratelimit_counts[ip] = 0;
}
ratelimit_counts[ip]++;
ratelimit_timestamps[ip] = Date.now();
if (ratelimit_counts[ip] > config.rate_limiting.initial_limit) {
console.log(`RATE LIMITED IP ADDRESS: ${ip}`);
return res.send(
`Hold your horses! You have hit the request limit. You should be able to refresh this page in a couple of seconds. If you think you are wrongfully limited, create an issue at https://codeberg.org/teddit/teddit. Rate limiting is highly experimental feature.`
);
} else {
return next();
}
} else {
return next();
}
});
module.exports = overridingRoutes;