connect-qos/lib/util.js

Connect middleware that helps maintain a high quality of service during heavy traffic

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
function _export(target, all) {
    for(var name in all)Object.defineProperty(target, name, {
        enumerable: true,
        get: all[name]
    });
}
_export(exports, {
    normalizeHost: function() {
        return normalizeHost;
    },
    resolveHostFromRequest: function() {
        return resolveHostFromRequest;
    },
    resolveIpFromRequest: function() {
        return resolveIpFromRequest;
    }
});
const HOST_NORMALIZE_REGEX = /(^www\.)?([^:]+)(:\d+)?$/;
function normalizeHost(host) {
    const match = HOST_NORMALIZE_REGEX.exec(host.toLowerCase());
    return match ? match[2] : host;
}
function resolveHostFromRequest(req) {
    const authority = req.headers[':authority'];
    return normalizeHost(authority || req.headers.host || 'unknown');
}
function resolveIpFromRequest(req, behindProxy = false) {
    // for security reasons, we should never ASSUME the server is behind a proxy
    // and only support `x-forwarded-for` is explicitly enabled
    const forwardedFor = behindProxy && req.headers['x-forwarded-for'];
    return forwardedFor || req?.socket?.remoteAddress || 'unknown';
}

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