eureka-node-client/lib/utils.js

针对项目对 eureka-js-client 进行的二次开发

const _ = require('lodash');
const os = require('os');
module.exports = {
	UPDATED: '__updated__',			//服务更新
	/**
	 * 获取本机IP地址
	 * @return {[Array]} [description]
	 */
	getIPAddresses: function(){
		let ifaces = os.networkInterfaces();
		let addresses = [];
		_.forIn(ifaces, (value, key) => {
			let iface = _.find(value, {'family': 'IPv4', 'internal': false});
			if (_.isNil(iface)) return;
			addresses.push(iface.address);
		});
		return addresses;
	},
	/**
	 * 获取本机主机名
	 * @return {[String]} [description]
	 */
	getHostName: function(){
		let host_name = os.hostname();
		return host_name;
	},
	/**
	 * 处理服务 返回由应用名称及路径组成的对象
	 * @param  {[type]} services [description]
	 * @return {[Array]}          [description]
	 */
	serviceHandler: function(services){
		let apps = {};
		if (_.isNil(services)) return apps;
		let _this = this;
		_.forEach(services, (instances, appId) => {
			apps[appId.toLowerCase()] = _this.instanceHandler(instances);
		});

		return apps;
	},
	/**
	 * 处理实例数组，将实例信息转为路径
	 * @param  {[Array]} instances [description]
	 * @return {[Array]}           [description]
	 */
	instanceHandler: function(instances){
		let services = [];
		if (_.isNil(instances)) return services;
		let _this = this;
		_.forEach(instances, (instance, key) => {
			services.push(_this.getServerPath(instance));
		});
		return services;
	},
	/**
	 * 根据实例获取一个完整的IP方式的服务地址
	 * @param  {[Object]} instance [description]
	 * @return {[String]}          [description]
	 */
	getServerPath: function(instance){
		let service = {};
		if (instance) {
			if (_.has(instance, "port") && instance.port["@enabled"] === "true") {
				service.http = `http://${instance.ipAddr}:${instance.port["$"]}`;
			}
			if (_.has(instance, "securePort") && instance.securePort["@enabled"] === "true") {
				service.https = `https://${instance.ipAddr}:${instance.port["$"]}`;
			}
			if (_.has(instance, 'metadata') && _.has(instance.metadata, 'gRPC')) {
				service.rpc = `${instance.ipAddr}:${instance.metadata.gRPC}`;
			}
		}
		return service;
	}
}