coordinator-node-client/lib/utils.js

分布式协调服务node客户端，用于获取微服务的可用地址，参照eureka-js-client.

var _ = require('lodash');
module.exports = {
    ADD: "added",//增加了新的服务
    REMOVED: "removed",//注册的服务被删除
    CHANGED: "changed",//注册的服务有变化
    /**
     * 获取本机ip地址
     * @returns {Array}
     */
    getServerAddresses: function () {
        var os = require('os');
        var ifaces = os.networkInterfaces();
        var addresses = [];
        Object.keys(ifaces).forEach(function (ifname) {
            ifaces[ifname].forEach(function (iface) {
                if ('IPv4' !== iface.family || iface.internal !== false) {
                    return;
                }
                addresses.push(iface.address);
            });
        });
        return addresses;
    },
    /**
     * 处理变化的服务，返回由应用名称及路径组成的对象
     * @param services
     * @returns {Array}
     */
    serviceHandler: function (services) {
        var apps = {};//服务
        if (services) {
            var _this = this;
            _.forEach(services, function (instances, appId) {
                //路径
                apps[appId.toLowerCase()] = _this.instanceHandler(instances);
            });
        }
        return apps;
    },
    /**
     * 处理实例数组,将实例信息转为路径
     * @param instances  实例数组
     * @returns {Array} 返回路径数组
     */
    instanceHandler: function (instances) {
        var pathes = [];
        var _this = this;
        _.forEach(instances, function (instance, key) {
            pathes.push(_this.getServerPath(instance));
        });
        return pathes;
    },
    /**
     * 根据实例获取一个完整的ip方式的服务地址。
     * @param instance  app的实例。
     * @returns {string}  url地址,包括协议，ip和端口。例如:http://192.168.1.100:8080。
     */
    getServerPath: function (instance) {
        var url = "", http = "http://", https = "https://";
        if (instance) {
            if (instance.port && instance.port["@enabled"] == "true") {
                url = http + instance.ipAddr + ":" + instance.port["$"];
            } else if (instance.securePort && instance.securePort["@enabled"] == "true") {
                url = https + instance.ipAddr + ":" + instance.securePort["$"];
            }
        }
        return url;
    }
};