99 lines
3.2 KiB
JavaScript
99 lines
3.2 KiB
JavaScript
"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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if (!isFinite(opts.port)) {
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opts.port = 443;
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}
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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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if (!Array.isArray(opts.paths)) {
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opts.paths = [{ match: "/" }];
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}
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if (!("body" in opts)) {
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opts.body =
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"<!-- Hello Developer Person! We don't serve insecure resources around here." +
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"\n Please use HTTPS instead. -->";
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}
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opts.body = opts.body.replace(/{{\s+PORT\s+}}/gi, opts.port);
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return function (req, res, next) {
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if (
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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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var url = req.originalUrl || req.url;
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// We don't want chrome showing the "Not Secure" badge during the redirect.
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var probablyBrowser =
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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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var host = req.headers.host || "";
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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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var newLocation =
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"https://" + host.replace(/:\d+/, ":" + opts.port) + url;
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//var encodedLocation = encodeURI(newLocation);
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var escapedLocation = escapeHtml(newLocation);
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var decodedLocation;
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try {
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decodedLocation = decodeURIComponent(newLocation);
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} catch (e) {
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decodedLocation = newLocation; // "#/error/?error_message=" + e.toString();
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}
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var body = opts.body
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.replace(/{{\s*HTML_URL\s*}}/gi, escapeHtml(decodedLocation))
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.replace(/{{\s*URL\s*}}/gi, escapedLocation)
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.replace(/{{\s*UNSAFE_URL\s*}}/gi, newLocation);
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var metaRedirect =
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"" +
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"<html>" +
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'\n<head><META http-equiv="refresh" content="0;URL=\'' +
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escapedLocation +
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"'\"></head>" +
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"\n<body>" +
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body +
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"</body>" +
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"\n</html>\n";
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var pathMatch;
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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 =
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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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// 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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res.setHeader("Location", newLocation);
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}
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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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