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/* global WIKI */
/**
* Security Middleware
*
* @param {Express Request} req Express request object
* @param {Express Response} res Express response object
* @param {Function} next next callback function
* @return {any} void
*/
module.exports = function (req, res, next) {
// -> Disable X-Powered-By
req.app.disable('x-powered-by')
// -> Disable Frame Embedding
if (WIKI.config.security.securityIframe) {
res.set('X-Frame-Options', 'deny')
}
// -> Re-enable XSS Fitler if disabled
res.set('X-XSS-Protection', '1; mode=block')
// -> Disable MIME-sniffing
res.set('X-Content-Type-Options', 'nosniff')
// -> Disable IE Compatibility Mode
res.set('X-UA-Compatible', 'IE=edge')
// -> Disables referrer header when navigating to a different origin
if (WIKI.config.security.securityReferrerPolicy) {
res.set('Referrer-Policy', 'same-origin')
}
// -> Enforce HSTS
if (WIKI.config.security.securityHSTS) {
res.set('Strict-Transport-Security', `max-age=${WIKI.config.security.securityHSTSDuration}; includeSubDomains`)
}
// -> Prevent Open Redirect from user provided URL
if (WIKI.config.security.securityOpenRedirect) {
// Strips out all repeating / character in the provided URL
req.url = req.url.replace(/(\/)(?=\/*\1)/g, '')
}
return next()
}