forked from geddy/geddy
/
app.js
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/
app.js
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/*
* Geddy JavaScript Web development framework
* Copyright 2112 Matthew Eernisse (mde@fleegix.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
var fs = require('fs')
, path = require('path')
, existsSync = typeof fs.existsSync == 'function' ?
fs.existsSync : path.existsSync
, url = require('url')
, querystring = require('../deps/qs')
, cwd = process.cwd()
, errors = require('./response/errors')
, response = require('./response')
, model = require('./model')
, utils = require('./utils/index')
, fileUtils = require('./utils/file')
, inflection = require('../deps/inflection')
, i18n = require('./i18n')
, init = require('./init')
, FunctionRouter = require('./routers/function_router').FunctionRouter
, RegExpRouter = require('./routers/regexp_router').RegExpRouter
, BaseController = require('./base_controller').BaseController
, sessions = require('./sessions')
, CookieCollection = require('./cookies').CookieCollection
, Request = require('./request').Request
, InFlight = require('./in_flight').InFlight;
// Set up a bunch of aliases
geddy.FunctionRouter = FunctionRouter;
geddy.RegExpRouter = RegExpRouter;
geddy.inFlight = new InFlight();
geddy.inflection = inflection;
geddy.model = model;
geddy.model.adapter = {};
geddy.utils = utils;
geddy.errors = errors;
var App = function () {
var JSPAT = /\.(js|coffee)$/;
var _getDirList = function (dirname) {
var dirList = fs.readdirSync(dirname)
, fileName
, filePath
, ctorName
, usingCoffee
, ret = [];
for (var i = 0; i < dirList.length; i++) {
fileName = dirList[i];
// Any files ending in '.js' or '.coffee'
if (JSPAT.test(fileName)) {
if(fileName.match(/\.coffee$/)) {
// fileName is a CoffeeScript file so try to require it
try {
usingCoffee = usingCoffee || require('coffee-script');
} catch(err) {
new errors.coffeeError();
}
}
// Strip the extension from the file name
fileName = fileName.replace(JSPAT, '');
// Convert underscores to camelCase with
// initial cap, e.g., 'NeilPearts'
ctorName = geddy.string.camelize(fileName, true);
filePath = path.join(cwd, dirname, fileName);
ret.push({
ctorName: ctorName
, filePath: filePath
});
}
}
return ret;
}
// Load models
// ==================
, _registerModels = function (next) {
// Set any model properties set in the config
geddy.mixin(geddy.model, geddy.config.model);
var modelDir = 'app/models'
, dirList
, item
, usingCoffee
, adapterName
, adapterPath
, appAdaptersPath = path.join(cwd, modelDir, '/adapters/');
// May be running entirely model-less
if (!existsSync(path.join(cwd, modelDir))) {
next();
}
else {
dirList = _getDirList(modelDir)
// Dynamically create controller
// constructors from files in app/models
for (var i = 0; i < dirList.length; i++) {
item = dirList[i];
require(item.filePath);
// model exists now and has an adapter defined
if (geddy.model[item.ctorName] && geddy.model[item.ctorName].adapter) {
adapterName = geddy.model[item.ctorName].adapter;
// Todo: There has to be a better way of detecting if it's coffee or not
// - But I couldn't think of a reliable way that would work
// If the app has an adapter that matches the model adapter, use it.
if (existsSync(path.join(appAdaptersPath, adapterName.toLowerCase() + '.js')) ||
existsSync(path.join(appAdaptersPath, adapterName.toLowerCase() + '.coffee'))) {
if(existsSync(path.join(appAdaptersPath, adapterName.toLowerCase() + '.coffee'))) {
try {
usingCoffee = usingCoffee || require('coffee-script');
} catch(err) {
new errors.coffeeError();
}
}
adapterPath = path.join(appAdaptersPath, adapterName.toLowerCase());
geddy.model.adapter[item.ctorName] = require(adapterPath)[adapterName];
}
// if the model has been defined by geddy, use it.
else if (existsSync(path.join(__dirname, "./model/adapters/", adapterName.toLowerCase() + '.js'))) {
var config = {model: item.ctorName};
adapterPath = path.join(__dirname, "./model/adapters/", adapterName.toLowerCase());
geddy.model.adapter[item.ctorName] = require(adapterPath)[adapterName](config);
}
else {
geddy.log.warning("no adapter found for " + adapterName);
}
}
// if the model doesn't define an adapter, use the default
else if (geddy.config.adapters && geddy.config.adapters.default &&
existsSync(path.join(__dirname, "./model/adapters/", geddy.config.adapters.default+".js"))) {
geddy.model.adapter[item.ctorName] = require(path.join(__dirname, "./model/adapters/", geddy.config.adapters.default));
}
// the adapter will be undefined if the model doesn't define it,
// and there is no default adapter in the config.
else {
geddy.log.warning("adapter not found, make sure your adapter is in app/models/adapters");
}
}
next();
}
}
// Load controller ctors
// ==================
, _registerConstructors = function (next) {
var controllerDir = 'app/controllers'
, dirList = _getDirList(controllerDir)
, item
, ctors = {}
, ctor;
// Dynamically create controller constructors
// from files in app/constructors
for (var i = 0; i < dirList.length; i++) {
item = dirList[i];
ctor = require(item.filePath)[item.ctorName];
ctor.origPrototype = ctor.prototype;
this.controllerRegistry[item.ctorName] = ctor;
}
next();
}
// Load the router
// ==================
, _loadRouter = function (next) {
routerCsFile = path.join(cwd, '/config/router.coffee');
if(existsSync(routerCsFile)) {
try {
require('coffee-script');
} catch(err) {
new errors.coffeeError();
}
}
router = require(path.join(cwd, '/config/router'));
router = router.router || router;
this.router = router;
next();
}
// Connect to session-store
// ==================
, _loadSessionStore = function (next) {
sessionsConfig = geddy.config.sessions;
if (sessionsConfig) {
sessions.createStore(sessionsConfig.store, next);
}
else {
next();
}
}
// Load any locales, set the default
// ==================
, _loadLocales = function (next) {
init.init(next);
}
// Load metrics if they're turned on
// ==================
, _loadMetrics = function (next) {
if (geddy.config.metrics) {
geddy.metrics = require('./metric');
}
next();
}
// Register template-paths
// ==================
, _registerTemplatePaths = function (next) {
var viewsPath = path.normalize('app/views');
// May be running entirely viewless
if (!existsSync(viewsPath)) {
this.templateRegistry = {};
next();
}
else {
var templates = {}
, files
, file
, pat = /\.ejs$/;
files = fileUtils.readdirR(viewsPath);
for (var i = 0; i < files.length; i++) {
file = files[i];
if (pat.test(file)) {
templates[file] = true;
}
}
this.templateRegistry = templates;
next();
}
}
// Run code in the app's config/init.js or .coffee variation
// ==================
, _runAppLocalInit = function (next) {
var dirList = fs.readdirSync(cwd + '/config')
, fileName
, fileExt
, fileBaseName
, usingCoffee;
for(var i = 0; i < dirList.length; i++) {
fileName = dirList[i];
fileExt = path.extname(fileName);
fileBaseName = path.basename(fileName, fileExt);
if(fileBaseName === 'init') {
if(fileExt === '.coffee') {
// fileName is a CoffeeScript file so try to require it
try {
usingCoffee = usingCoffee || require('coffee-script');
} catch(err) {
new errors.coffeeError();
}
}
require(path.join(cwd, 'config', fileName));
}
}
next();
};
this.router = null;
this.modelRegistry = {};
this.templateRegistry = {};
this.controllerRegistry = {};
this.init = function (callback) {
var self = this
, items
, chain;
items = [
_registerModels
, _registerConstructors
, _loadRouter
, _loadSessionStore
, _loadLocales
, _loadMetrics
, _registerTemplatePaths
, _runAppLocalInit
];
chain = new geddy.async.SimpleAsyncChain(items, this);
chain.last = function () {
self.start(callback);
};
chain.run();
};
this.start = function (callback) {
var self = this
, ctors = this.controllerRegistry
, router = this.router;
// Handle the requests
// ==================
var allRequestTimer = geddy.config.metrics && geddy.metrics.Timer('Geddy.all-requests')
, controllerActionTimers = {};
geddy.server.addListener('request', function (req, resp) {
var reqObj
, params
, urlParams
, method
, ctor
, appCtor
, baseController
, controller
, controllerName
, actionName
, staticPath
, staticResp
, err
, errResp
, body = ''
, bodyParams
, steps = {
parseBody: false
, sessions: false
}
, finish
, accessTime = (new Date()).getTime()
, inFlighId;
// Buffered request-obj -- buffer the request data,
// and pass this proxy object to the controller
reqObj = new Request(req);
finish = function (step) {
steps[step] = true;
for (var p in steps) {
if (!steps[p]) {
return false;
}
}
controller._handleAction.call(controller, params.action);
reqObj.sync(); // Flush buffered events and begin emitting
};
if (router) {
urlParams = url.parse(req.url, true).query;
if (req.method.toUpperCase() == 'POST') {
// POSTs may be overridden by the _method param
if (urlParams._method) {
method = urlParams._method;
}
// Or x-http-method-override header
else if (req.headers['x-http-method-override']) {
method = req.headers['x-http-method-override'];
}
else {
method = req.method;
}
}
else {
method = req.method;
}
// Okay, let's be anal and force all the HTTP verbs to uppercase
method = method.toUpperCase();
inFlightId = geddy.inFlight.addEntry({
request: req
, method: method
, response: resp
, accessTime: accessTime
});
req._geddyId = inFlightId;
resp._geddyId = inFlightId;
// FIXME: Holy shit, all inline here
resp.addListener('finish', function () {
var id = resp._geddyId
, entry = geddy.inFlight.getEntry(id)
, req = entry.request
, stat = resp.statusCode
, level = parseInt(stat, 10) > 499 ? 'error' : 'access'
, endTime = new Date();
// Apache extended log-format
geddy.log[level](req.connection.remoteAddress + ' ' +
'- ' +
'- ' +
'[' + new Date(entry.accessTime) + '] ' +
'"' + entry.method + ' ' + req.url + ' ' +
req.httpVersion + '" ' +
stat + ' ' +
(resp._length || '-') + ' ' +
'"' + (req.headers['referer'] || '-') + '" ' +
'"' + (req.headers['user-agent'] || '-') + '" ');
geddy.inFlight.removeEntry(id);
if (geddy.config.metrics) {
allRequestTimer.update(endTime - accessTime);
controllerActionTimers[controllerName] = controllerActionTimers[controller] || {}
controllerActionTimers[controllerName][actionName] =
controllerActionTimers[controllerName][actionName] ||
geddy.metrics.Timer("Geddy."+controllerName + '.' + actionName)
controllerActionTimers[controllerName][actionName].update(endTime - accessTime);
}
});
params = router.first(req, method);
}
if (params) {
if (params instanceof Error) {
err = new errors.MethodNotAllowedError(method + ' method is not allowed.');
errResp = new response.Response(resp);
errResp.send(err.message, err.statusCode, {
'Content-Type': 'text/html'
, 'Allow': params.allowed.join(', ')
});
}
else {
controllerName = params.controller;
actionName = params.action;
ctor = ctors[params.controller];
if (ctor) {
// Merge params from the URL and the query-string to produce a
// Grand Unified Params object
geddy.mixin(params, urlParams);
// If it's a plain form-post, save the request-body, and parse it into
// params as well
if ((req.method == 'POST' || req.method == 'PUT') &&
(req.headers['content-type'] &&
(req.headers['content-type'].indexOf('form-urlencoded') > -1 ||
req.headers['content-type'].indexOf('application/json') > -1))) {
req.addListener('data', function (data) {
body += data.toString();
});
// Handle the request once it's finished
req.addListener('end', function () {
bodyParams = querystring.parse(body);
geddy.mixin(params, bodyParams);
req.body = body;
finish('parseBody');
});
}
else {
finish('parseBody');
}
// If there's an Application controller, use an instance of it
// as the prototype of the controller for this request
if (ctors.Application) {
// The constructor for the Application controller
appCtor = ctors.Application;
// Give the constructor a new prototype to inherit from: an instance
// of the BaseController, with the methods/properties from its original
// prototype copied over
appCtor.prototype = utils.enhance(new BaseController(),
appCtor.origPrototype);
// Make an instance -- this instance will be the proto for the
// controller for this request
baseController = new appCtor();
}
// If there's no Application controller, use an instance of
// BaseController as the proto
else {
baseController = new BaseController();
}
// Give the constructor for this request's controller a new
// prototype: the Application/BaseController (or just BaseController)
// instance, with the methods/properties from the original prototype
// copied over
ctor.prototype = utils.enhance(baseController,
ctor.origPrototype);
// Instantiate the controller
controller = new ctor();
// Now that there's a controller, record the access-time
controller.accessTime = accessTime;
if (typeof controller[params.action] == 'function') {
controller.app = self;
controller.request = reqObj;
controller.response = resp;
controller.method = method;
controller.params = params;
controller.name = params.controller;
controller.i18n = new i18n.I18n(controller);
// We have a controller instance; register it with the
// in-flight data
geddy.inFlight.updateEntry(req._geddyId, {
controller: controller
});
controller.cookies = new CookieCollection(req);
if (geddy.config.sessions) {
controller.session =
new sessions.Session(controller, function () {
finish('sessions');
});
}
else {
finish('sessions');
}
}
// No action, 500 error
else {
err = new errors.InternalServerError('No ' + params.action +
' action on ' + params.controller + ' controller.');
errResp = new response.Response(resp);
errResp.send(err.message, err.statusCode,
{'Content-Type': 'text/html'});
}
}
// no controller, 500 error
else {
err = new errors.internalservererror('controller ' +
params.controller + ' not found.');
errresp = new response.response(resp);
errresp.send(err.message, err.statuscode,
{'content-type': 'text/html'});
}
}
}
// Either static or 404
else {
// Get the path to the file
staticPath = geddy.config.staticFilePath + '/' + req.url;
// Ignore querystring
staticPath = staticPath.split('?')[0];
// Decode path (e.g. %20)
staticPath = decodeURIComponent(staticPath);
if (existsSync(staticPath)) {
staticResp = new response.Response(resp);
staticResp.sendFile(staticPath);
}
else {
err = new errors.NotFoundError(req.url + ' not found.');
errResp = new response.Response(resp);
errResp.send(err.message, err.statusCode,
{'Content-Type': 'text/html'});
}
}
});
callback();
};
};
module.exports.App = App;