Ghost/core/server/index.js

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// Module dependencies
var crypto = require('crypto'),
express = require('express'),
hbs = require('express-hbs'),
compress = require('compression'),
fs = require('fs'),
uuid = require('node-uuid'),
Polyglot = require('node-polyglot'),
semver = require('semver'),
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_ = require('lodash'),
when = require('when'),
api = require('./api'),
config = require('./config'),
errors = require('./errors'),
helpers = require('./helpers'),
mailer = require('./mail'),
middleware = require('./middleware'),
migrations = require('./data/migration'),
models = require('./models'),
permissions = require('./permissions'),
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apps = require('./apps'),
packageInfo = require('../../package.json'),
// Variables
httpServer,
dbHash;
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// If we're in development mode, require "when/console/monitor"
// for help in seeing swallowed promise errors, and log any
// stderr messages from bluebird promises.
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if (process.env.NODE_ENV === 'development') {
require('when/monitor/console');
}
function doFirstRun() {
var firstRunMessage = [
'Welcome to Ghost.',
'You\'re running under the <strong>',
process.env.NODE_ENV,
'</strong>environment.',
'Your URL is set to',
'<strong>' + config.url + '</strong>.',
'See <a href="http://docs.ghost.org/">http://docs.ghost.org</a> for instructions.'
];
return api.notifications.add({ notifications: [{
type: 'info',
message: firstRunMessage.join(' ')
}] }, {context: {internal: true}});
}
function initDbHashAndFirstRun() {
return api.settings.read({key: 'dbHash', context: {internal: true}}).then(function (response) {
var hash = response.settings[0].value,
initHash;
dbHash = hash;
if (dbHash === null) {
initHash = uuid.v4();
return api.settings.edit({settings: [{key: 'dbHash', value: initHash}]}, {context: {internal: true}})
.then(function (response) {
dbHash = response.settings[0].value;
return dbHash;
}).then(doFirstRun);
}
return dbHash;
});
}
// Checks for the existence of the "built" javascript files from grunt concat.
// Returns a promise that will be resolved if all files exist or rejected if
// any are missing.
function builtFilesExist() {
var deferreds = [],
location = config.paths.builtScriptPath,
fileNames = process.env.NODE_ENV === 'production' ?
helpers.scriptFiles.production : helpers.scriptFiles.development;
function checkExist(fileName) {
var deferred = when.defer(),
errorMessage = "Javascript files have not been built.",
errorHelp = "\nPlease read the getting started instructions at:" +
"\nhttps://github.com/TryGhost/Ghost#getting-started-guide-for-developers";
fs.exists(fileName, function (exists) {
if (exists) {
deferred.resolve(true);
} else {
var err = new Error(errorMessage);
err.help = errorHelp;
deferred.reject(err);
}
});
return deferred.promise;
}
fileNames.forEach(function (fileName) {
deferreds.push(checkExist(location + fileName));
});
return when.all(deferreds);
}
function ghostStartMessages() {
// Tell users if their node version is not supported, and exit
if (!semver.satisfies(process.versions.node, packageInfo.engines.node)) {
console.log(
"\nERROR: Unsupported version of Node".red,
"\nGhost needs Node version".red,
packageInfo.engines.node.yellow,
"you are using version".red,
process.versions.node.yellow,
"\nPlease go to http://nodejs.org to get a supported version".green
);
process.exit(0);
}
// Startup & Shutdown messages
if (process.env.NODE_ENV === 'production') {
console.log(
"Ghost is running...".green,
"\nYour blog is now available on",
config.url,
"\nCtrl+C to shut down".grey
);
// ensure that Ghost exits correctly on Ctrl+C
process.removeAllListeners('SIGINT').on('SIGINT', function () {
console.log(
"\nGhost has shut down".red,
"\nYour blog is now offline"
);
process.exit(0);
});
} else {
console.log(
("Ghost is running in " + process.env.NODE_ENV + "...").green,
"\nListening on",
config.getSocket() || config.server.host + ':' + config.server.port,
"\nUrl configured as:",
config.url,
"\nCtrl+C to shut down".grey
);
// ensure that Ghost exits correctly on Ctrl+C
process.removeAllListeners('SIGINT').on('SIGINT', function () {
console.log(
"\nGhost has shutdown".red,
"\nGhost was running for",
Math.round(process.uptime()),
"seconds"
);
process.exit(0);
});
}
}
// This is run after every initialization is done, right before starting server.
// Its main purpose is to move adding notifications here, so none of the submodules
// should need to include api, which previously resulted in circular dependencies.
// This is also a "one central repository" of adding startup notifications in case
// in the future apps will want to hook into here
function initNotifications() {
if (mailer.state && mailer.state.usingSendmail) {
api.notifications.add({ notifications: [{
type: 'info',
message: [
"Ghost is attempting to use your server's <b>sendmail</b> to send e-mail.",
"It is recommended that you explicitly configure an e-mail service,",
"See <a href=\"http://docs.ghost.org/mail\">http://docs.ghost.org/mail</a> for instructions"
].join(' ')
}] }, {context: {internal: true}});
}
if (mailer.state && mailer.state.emailDisabled) {
api.notifications.add({ notifications: [{
type: 'warn',
message: [
"Ghost is currently unable to send e-mail.",
"See <a href=\"http://docs.ghost.org/mail\">http://docs.ghost.org/mail</a> for instructions"
].join(' ')
}] }, {context: {internal: true}});
}
}
// ## Initializes the ghost application.
// Sets up the express server instance.
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// Instantiates the ghost singleton, helpers, routes, middleware, and apps.
// Finally it starts the http server.
function init(server) {
// create a hash for cache busting assets
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var assetHash = (crypto.createHash('md5').update(packageInfo.version + Date.now()).digest('hex')).substring(0, 10);
// If no express instance is passed in
// then create our own
if (!server) {
server = express();
}
// Set up Polygot instance on the require module
Polyglot.instance = new Polyglot();
// ### Initialisation
// The server and its dependencies require a populated config
// It returns a promise that is resolved when the application
// has finished starting up.
// Make sure javascript files have been built via grunt concat
return builtFilesExist().then(function () {
// Initialise the models
return models.init();
}).then(function () {
// Initialize migrations
return migrations.init();
}).then(function () {
// Populate any missing default settings
return models.Settings.populateDefaults();
}).then(function () {
// Initialize the settings cache
return api.init();
}).then(function () {
// Initialize the permissions actions and objects
// NOTE: Must be done before the config.theme.update and initDbHashAndFirstRun calls
return permissions.init();
}).then(function () {
// We must pass the api.settings object
// into this method due to circular dependencies.
return config.theme.update(api.settings, config.url);
}).then(function () {
return when.join(
// Check for or initialise a dbHash.
initDbHashAndFirstRun(),
// Initialize mail
mailer.init(),
// Initialize apps
apps.init()
);
}).then(function () {
var adminHbs = hbs.create(),
deferred = when.defer();
// Output necessary notifications on init
initNotifications();
// ##Configuration
// return the correct mime type for woff filess
express['static'].mime.define({'application/font-woff': ['woff']});
// enabled gzip compression by default
if (config.server.compress !== false) {
server.use(compress());
}
// ## View engine
// set the view engine
server.set('view engine', 'hbs');
// Create a hbs instance for admin and init view engine
server.set('admin view engine', adminHbs.express3({}));
// Load helpers
helpers.loadCoreHelpers(adminHbs, assetHash);
// ## Middleware and Routing
middleware(server, dbHash);
// Log all theme errors and warnings
_.each(config.paths.availableThemes._messages.errors, function (error) {
errors.logError(error.message, error.context, error.help);
});
_.each(config.paths.availableThemes._messages.warns, function (warn) {
errors.logWarn(warn.message, warn.context, warn.help);
});
// ## Start Ghost App
if (config.getSocket()) {
// Make sure the socket is gone before trying to create another
try {
fs.unlinkSync(config.getSocket());
} catch (e) {
// We can ignore this.
}
httpServer = server.listen(
config.getSocket()
);
fs.chmod(config.getSocket(), '0660');
} else {
httpServer = server.listen(
config.server.port,
config.server.host
);
}
httpServer.on('listening', function () {
ghostStartMessages();
deferred.resolve(httpServer);
});
return deferred.promise;
});
}
module.exports = init;