app.js

var createError = require("http-errors");
var express = require("express");
var path = require("path");
var cookieParser = require("cookie-parser");
var logger = require("morgan");
var bodyParser = require("body-parser");
var session = require("express-session");
var MongoStore = require("connect-mongo");
var passport = require("passport");
var flash = require('connect-flash');
require("dotenv").config();

var indexRouter = require("./routes/index");
var mongooseConnection = require("./config/database");

var PORT = process.env.PORT;
var app = express();

// view engine setup
app.set("views", path.join(__dirname, "views"));
app.set("view engine", "hbs");

app.use(logger("dev"));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, "public")));
//bodyParser
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(flash());

app.use(
  session({
    secret: "passport-tutorial",
    cookie: { maxAge: 60000 },
    resave: false,
    store: MongoStore.create({ client: mongooseConnection.getClient() }),  // 设置session的存储位置
    saveUninitialized: false,
  })
);

// passportjs
require("./config/passport");
app.use(passport.initialize());
app.use(passport.session());

app.use("/", indexRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get("env") === "development" ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render("error");
});

app.listen(PORT, function () {
  console.log("started website on http://localhost:" + PORT);
});

module.exports = app;