2015-07-07 23:19:44 +00:00
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'use strict';
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module.exports = function (opts) {
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var escapeHtml = require('escape-html');
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if (!opts) {
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opts = {};
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}
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2018-10-02 23:49:24 +00:00
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if (!isFinite(opts.port)) {
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2015-07-07 23:19:44 +00:00
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opts.port = 443;
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}
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2018-10-02 23:49:24 +00:00
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if (!opts.browsers) {
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opts.browsers = 301;
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}
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if (!opts.apis) {
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opts.apis = 'meta';
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}
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2018-10-03 00:25:04 +00:00
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if (!Array.isArray(opts.paths)) {
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opts.paths = [ { match: '/' } ];
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}
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2015-07-07 23:19:44 +00:00
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if (!('body' in opts)) {
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2018-08-17 02:50:50 +00:00
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opts.body = "<!-- Hello Developer Person! We don't serve insecure resources around here."
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2015-07-07 23:19:44 +00:00
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+ "\n Please use HTTPS instead. -->";
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}
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2018-02-27 22:42:26 +00:00
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opts.body = opts.body.replace(/{{\s+PORT\s+}}/ig, opts.port);
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2015-07-07 23:19:44 +00:00
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return function (req, res, next) {
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if (req.connection.encrypted
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|| 'https' === req.protocol
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|| (opts.trustProxy && 'https' === req.headers['x-forwarded-proto'])
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) {
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next();
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return;
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}
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2018-02-27 22:42:26 +00:00
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var url = (req.originalUrl || req.url);
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2018-10-02 23:49:24 +00:00
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// We don't want chrome showing the "Not Secure" badge during the redirect.
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var probablyBrowser = (0 === (req.headers['user-agent']||'').indexOf('Mozilla/'));
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// But we don't want devs, APIs, or Bots to accidentally browse insecure.
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var redirect = probablyBrowser ? opts.browsers : opts.apis;
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2015-07-07 23:19:44 +00:00
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var host = req.headers.host || '';
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2016-11-21 22:45:05 +00:00
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if (!/:\d+/.test(host) && 443 !== opts.port) {
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// we are using standard port 80, but we aren't using standard port 443
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host += ':80';
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}
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2015-07-07 23:19:44 +00:00
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var newLocation = 'https://'
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+ host.replace(/:\d+/, ':' + opts.port) + url
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;
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2018-09-07 19:30:29 +00:00
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2015-07-07 23:19:44 +00:00
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//var encodedLocation = encodeURI(newLocation);
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var escapedLocation = escapeHtml(newLocation);
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2018-02-27 22:42:26 +00:00
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var decodedLocation;
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2018-02-26 19:02:44 +00:00
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try {
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2018-02-27 22:42:26 +00:00
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decodedLocation = decodeURIComponent(newLocation);
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2018-02-26 19:02:44 +00:00
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} catch(e) {
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2018-02-27 22:42:26 +00:00
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decodedLocation = newLocation; // "#/error/?error_message=" + e.toString();
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2018-02-26 19:02:44 +00:00
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}
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2018-09-07 19:30:29 +00:00
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2015-07-07 23:19:44 +00:00
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var body = opts.body
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2018-02-27 22:42:26 +00:00
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.replace(/{{\s*HTML_URL\s*}}/ig, escapeHtml(decodedLocation))
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2015-07-07 23:19:44 +00:00
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.replace(/{{\s*URL\s*}}/ig, escapedLocation)
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.replace(/{{\s*UNSAFE_URL\s*}}/ig, newLocation)
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;
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var metaRedirect = ''
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2020-04-26 23:31:25 +00:00
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+ '<html>'
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+ '\n<head><META http-equiv="refresh" content="0;URL=\'' + escapedLocation + '\'"></head>'
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+ '\n<body>' + body + '</body>'
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+ '\n</html>\n'
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2015-07-07 23:19:44 +00:00
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;
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2018-10-03 00:25:04 +00:00
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var pathMatch;
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2015-07-07 23:19:44 +00:00
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2018-10-03 00:25:04 +00:00
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opts.paths.some(function (p) {
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if (!p.match) {
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// ignore
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} else if ('string' === typeof p.match) {
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pathMatch = (url === p.match) && (p.redirect || 301);
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} else {
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pathMatch = p.match.test && p.match.test(url) && (p.redirect || 301);
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}
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if (pathMatch) {
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redirect = pathMatch;
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}
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return pathMatch;
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});
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2018-10-02 23:49:24 +00:00
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// If it's not a non-0 number (because null is 0) then 'meta' is assumed.
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if (redirect && isFinite(redirect)) {
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res.statusCode = redirect;
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2018-09-07 19:30:29 +00:00
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res.setHeader('Location', newLocation);
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}
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2015-07-07 23:19:44 +00:00
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res.setHeader('Content-Type', 'text/html; charset=utf-8');
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res.end(metaRedirect);
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};
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};
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