for appfog I usually use this code:
var host = process.env.VCAP_APP_HOST || "127.0.0.1";
var port = process.env.VCAP_APP_PORT || 1337;
http.createServer(function (req, res) {
// ...
}).listen(port, host);
Now I found a very interesting forum software . Here is the app.js:
'use strict';
/*global global, require, process, module, jsGen, _restConfig*/
var fs = require('fs'),
path = require('path'),
zlib = require('zlib'),
util = require('util'),
http = require('http'),
domain = require('domain'),
serverDm = domain.create(),
processPath = path.dirname(process.argv[1]);
global.jsGen = {}; // 注册全局变量jsGen
jsGen.version = '0.6.6';
serverDm.on('error', function (err) {
delete err.domain;
jsGen.serverlog.error(err);
});
serverDm.run(function () {
jsGen.conf = module.exports.conf = require('./config/config'); // 注册rrestjs配置文件
jsGen.module = {};
jsGen.module.os = require('os');
jsGen.module.xss = require('xss');
jsGen.module.then = require('thenjs');
jsGen.module.marked = require('marked');
jsGen.module.rrestjs = require('rrestjs');
jsGen.module.mongoskin = require('mongoskin');
jsGen.module.nodemailer = require('nodemailer');
jsGen.serverlog = jsGen.module.rrestjs.restlog;
jsGen.lib = {};
jsGen.lib.msg = require('./lib/msg.js');
jsGen.lib.json = require('./lib/json.js');
jsGen.lib.tools = require('./lib/tools.js');
jsGen.lib.email = require('./lib/email.js');
jsGen.lib.redis = require('./lib/redis.js');
jsGen.lib.CacheLRU = require('./lib/cacheLRU.js');
jsGen.lib.converter = require('./lib/anyBaseConverter.js');
jsGen.Err = jsGen.lib.tools.Err;
jsGen.dao = {};
jsGen.dao.db = require('./dao/mongoDao.js').db;
jsGen.dao.tag = require('./dao/tagDao.js');
jsGen.dao.user = require('./dao/userDao.js');
jsGen.dao.index = require('./dao/indexDao.js');
jsGen.dao.article = require('./dao/articleDao.js');
jsGen.dao.message = require('./dao/messageDao.js');
jsGen.dao.collection = require('./dao/collectionDao.js');
jsGen.thenErrLog = function (defer, err) {
jsGen.serverlog.error(err);
};
var redis = jsGen.lib.redis,
then = jsGen.module.then,
each = jsGen.lib.tools.each,
CacheLRU = jsGen.lib.CacheLRU,
extend = jsGen.lib.tools.extend,
resJson = jsGen.lib.tools.resJson,
TimeLimitCache = jsGen.lib.redis.TimeLimitCache;
then(function (defer) {
redis.initConfig(jsGen.lib.json.GlobalConfig, defer); // 初始化config缓存
}).then(function (defer, config) {
jsGen.config = config;
if (!jsGen.config.date) { // config缓存未赋值，则从MongoDB取值
then(function (defer2) {
jsGen.dao.index.getGlobalConfig(defer2);
}).then(function (defer2, config) {
defer2(null, config);
}, function (defer2, err) {
// MongoDB无值，初始化数据库
require('./api/install.js')().then(function () {
defer2(null, jsGen.lib.json.GlobalConfig);
}).fail(defer2);
}).then(function (defer2, config) {
each(jsGen.config, function (value, key, list) {
if (key in config) {
list[key] = config[key]; // 写入config缓存
}
});
defer(null, jsGen.config);
}).fail(defer);
} else {
defer(null, config);
}
}).then(function (defer, config) {
var api = ['index', 'user', 'article', 'tag', 'collection', 'message', 'rebuild'];
jsGen.cache = {};
jsGen.cache.tag = new CacheLRU(config.tagCache);
jsGen.cache.user = new CacheLRU(config.userCache);
jsGen.cache.list = new CacheLRU(config.listCache);
jsGen.cache.article = new CacheLRU(config.articleCache);
jsGen.cache.comment = new CacheLRU(config.commentCache);
jsGen.cache.message = new CacheLRU(config.messageCache);
jsGen.cache.collection = new CacheLRU(config.collectionCache);
jsGen.cache.timeInterval = new TimeLimitCache(config.TimeInterval, 'string', 'interval', false);
jsGen.cache.pagination = new TimeLimitCache(config.paginationCache, 'array', 'pagination', true);
jsGen.robotReg = new RegExp(config.robots || 'Baiduspider|Googlebot|BingBot|Slurp!', 'i');
jsGen.api = {};
each(api, function (x) {
jsGen.api[x] = {}; // 初始化api引用，从而各api内部可提前获取其它api引用
});
each(api, function (x) {
extend(jsGen.api[x], require('./api/' + x + '.js')); // 扩展各api的具体方法
});
fs.readFile(processPath + '/package.json', 'utf8', defer); // 读取软件信息
}).then(function (defer, data) {
data = JSON.parse(data);
data.version = jsGen.version;
data.nodejs = process.versions.node;
data.rrestjs = _restConfig._version;
jsGen.config.info = data;
redis.userCache.index.total(defer); // 读取user缓存
}).then(function (defer, users) {
var rebuild = jsGen.api.rebuild;
if (!users) { // user缓存为空，则判断redis缓存为空，需要初始化
// 初始化redis缓存
then(function (defer2) {
rebuild.user().all(defer2);
}).then(function (defer2) {
rebuild.tag().all(defer2);
}).then(function (defer2) {
rebuild.article().all(defer);
}).fail(defer);
} else {
defer();
}
}).then(function (defer) {
http.createServer(function (req, res) {
var dm = domain.create();
function errHandler(err, res, dm) {
delete err.domain;
try {
res.on('finish', function () {
//jsGen.dao.db.close();
process.nextTick(function () {
dm.dispose();
});
});
if (err.hasOwnProperty('name')) {
res.sendjson(resJson(err));
} else {
jsGen.serverlog.error(err);
res.sendjson(resJson(jsGen.Err(jsGen.lib.msg.MAIN.requestDataErr)));
}
} catch (error) {
delete error.domain;
jsGen.serverlog.error(error);
dm.dispose();
}
}
function router(req, res) {
if (req.path[0] === 'api' && jsGen.api[req.path[1]]) {
jsGen.api[req.path[1]][req.method.toUpperCase()](req, res); // 处理api请求
} else if (req.path[0].toLowerCase() === 'sitemap.xml') {
jsGen.api.article.sitemap(req, res); // 响应搜索引擎sitemap，动态生成
} else if (req.path[0].slice(-3).toLowerCase() === 'txt') {
// 直接响应static目录的txt文件，如robots.txt
then(function (defer) {
fs.readFile(processPath + '/static/' + req.path[0], 'utf8', defer);
}).then(function (defer, txt) {
res.setHeader('Content-Type', 'text/plain');
res.send(txt);
}).fail(res.throwError);
} else if (jsGen.robotReg.test(req.useragent)) {
jsGen.api.article.robot(req, res); // 处理搜索引擎请求
} else {
jsGen.config.visitors = 1; // 访问次数+1
res.setHeader('Content-Type', 'text/html');
if (jsGen.cache.indexTpl) {
res.send(jsGen.cache.indexTpl); // 响应首页index.html
} else {
then(function (defer) {
fs.readFile(processPath + '/static/index.html', 'utf8', defer);
}).then(function (defer, tpl) {
jsGen.cache.indexTpl = tpl.replace(/_jsGenVersion_/g, jsGen.version);
res.send(jsGen.cache.indexTpl);
}).fail(res.throwError);
}
}
}
res.throwError = function (defer, err) { // 处理then.js捕捉的错误
if (!util.isError(err)) {
err = jsGen.Err(err);
}
errHandler(err, res, dm);
};
dm.on('error', function (err) { // 处理domain捕捉的错误
errHandler(err, res, dm);
});
dm.run(function () {
router(req, res); // 运行
});
}).listen(jsGen.module.rrestjs.config.listenPort);
console.log('jsGen start!');
}).fail(function (defer, err) {
throw err;
});
});
Do you know how to modify this code to deploy to appfog?
appfog and cloudfoundry support auto-reconfiguration for node.js applications. So the code should run on AppFog without any modifications.
However if you want to use those environment variables, you can start by modifying the line .listen(jsGen.module.rrestjs.config.listenPort); so it reads:
.listen(process.env.VCAP_APP_PORT, process.env.VCAP_APP_HOST);