@jhvjkcyyfdxghjk/passport-openidconnect/lib/utils.js

OpenID Connect authentication strategy for Passport - without forced openid scope.

var crypto = require("crypto");

/**
 * Reconstructs the original URL of the request.
 *
 * This function builds a URL that corresponds the original URL requested by the
 * client, including the protocol (http or https) and host.
 *
 * If the request passed through any proxies that terminate SSL, the
 * `X-Forwarded-Proto` header is used to detect if the request was encrypted to
 * the proxy.
 *
 * @return {String}
 */
exports.originalURL = function (req, options) {
    options = options || {};
    var app = req.app;
    if (app && app.get && app.get("trust proxy")) {
        options.proxy = true;
    }
    var trustProxy = options.proxy;

    var proto = (req.headers["x-forwarded-proto"] || "").toLowerCase(),
        tls =
            req.connection.encrypted ||
            (trustProxy && "https" == proto.split(/\s*,\s*/)[0]),
        host =
            (trustProxy && req.headers["x-forwarded-host"]) || req.headers.host,
        protocol = tls ? "https" : "http",
        path = req.url || "";
    return protocol + "://" + host + path;
};

/**
 * Merge object b with object a.
 *
 *     var a = { foo: 'bar' }
 *       , b = { bar: 'baz' };
 *
 *     utils.merge(a, b);
 *     // => { foo: 'bar', bar: 'baz' }
 *
 * @param {Object} a
 * @param {Object} b
 * @return {Object}
 */
exports.merge = function (a, b) {
    if (a && b) {
        for (var key in b) {
            a[key] = b[key];
        }
    }
    return a;
};

/**
 * Return a unique identifier with the given `len`.
 *
 *     utils.uid(10);
 *     // => "FDaS435D2z"
 *
 * CREDIT: Connect -- utils.uid
 *         https://github.com/senchalabs/connect/blob/2.7.2/lib/utils.js
 *
 * @param {Number} len
 * @return {String}
 */

exports.uid = function (len) {
    return crypto
        .randomBytes(Math.ceil((len * 3) / 4))
        .toString("base64")
        .slice(0, len);
};