# all files / http-proxy-middleware/lib/ router.js

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     var _      = require('lodash');
    var logger = require('./logger.js').getInstance();

    module.exports = {
        getTarget: getTarget
    };

    function getTarget(req, config) {
        var newTarget;
        var router = config.router;

        if (_.isPlainObject(router)) {
            newTarget = getTargetFromProxyTable(req, router);
        } else if (_.isFunction(router)) {
            newTarget = router(req);
        }

        return newTarget;
    }

    function getTargetFromProxyTable(req, table) {
        var result;
        var host = req.headers.host;
        var path = req.url;

        var hostAndPath = host + path;

        _.forIn(table, function(value, key) {
            if (containsPath(key)) {

                if (hostAndPath.indexOf(key) > -1) {    // match 'localhost:3000/api'
                    result = table[key];
                    logger.debug('[HPM] Router table match: "%s"', key);
                    return false;
                }
            } else {

                if (key === host) {                     // match 'localhost:3000'
                    result = table[key];
                    logger.debug('[HPM] Router table match: "%s"', host);
                    return false;
                }

            }

        });

        return result;
    }

    function containsPath(v) {
        return v.indexOf('/') > -1;
    }