app.js

/**
 * Module dependencies.
 */
const express = require("express");
const helmet = require("helmet");
const errorHandler = require("errorhandler");
const mongoose = require("mongoose");
const bodyParser = require("body-parser");
const dotenv = require("dotenv");
const passport = require("passport");
const cors = require("cors");
const compression = require("compression");
const bluebird = require("bluebird");
const path = require("path");

/**
 * Load environment variables from .env file.
 * if there is a variable in the .env file which collides with one that already
 * exists in your environment, then that variable will be skipped
 */
dotenv.config();

/**
 * Create Express server.
 */
var app = express();

/**
 * Winston Logging Configuration.
 */
var logger = require("./log.js"); // requires winston and configures transports for winstons default logger

/**
 * Connect Mongoose to MongoDB.
 */
let options = {
  useMongoClient: true,
  autoIndex: true, // Build indexes
  reconnectTries: Number.MAX_VALUE, // Never stop trying to reconnect
  reconnectInterval: 500, // Reconnect every 500ms
  poolSize: 10, // Maintain up to 10 socket connections
  bufferMaxEntries: 0 // If not connected, return errors immediately rather than waiting for reconnect
};

mongoose.Promise = bluebird;

let mongoConnectionString = process.env.NODE_ENV === "test" ? process.env.MONGODBTEST : process.env.MONGODB;
mongoose.connect(mongoConnectionString, options);

mongoose.connection.on("error", () => {
  console.log("MongoDB Connection Error. Please make sure that MongoDB is running.");
  process.exit(1);
});

/**
 * Express configuration.
 */
// app.use is Binding application-level middleware to an instance of the app object
app.set("port", process.env.PORT || 3001);
app.use(helmet());
app.use(cors());
app.use(bodyParser.json()); // for parsing application/json
app.use(
  bodyParser.urlencoded({
    extended: false
  })
); // for parsing application/x-www-form-urlencoded
app.use(errorHandler()); // Error Handler
app.use(compression());
app.use("/static", express.static(path.join(__dirname, "public")));

/**
 * Load Passport Strategys.
 */
const localSignupStrategy = require("./passport/local-signup");
const localLoginStrategy = require("./passport/local-login");
passport.use("local-signup", localSignupStrategy);
passport.use("local-login", localLoginStrategy);

/**
 * Routes configuration.
 */
var tracksRouter = require("./routes/publicTracks");
var protectedTracksRouter = require("./routes/protectedTracks");
var usersRouter = require("./routes/publicUsers");
var protectedUsersRouter = require("./routes/protectedUsers");
var authRouter = require("./routes/publicAuth");
app.use("/tracks", tracksRouter);
app.use("/tracks", protectedTracksRouter);
app.use("/users", usersRouter);
app.use("/users", protectedUsersRouter);
app.use("/auth", authRouter);

var server = app.listen(app.get("port"), () => {
  if (process.env.NODE_ENV !== "test") {
    console.log("Streamlo Webservice listening on port " + app.get("port") + "!");
  }
});

module.exports = server;