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app.js
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app.js
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let createError = require('http-errors');
let express = require('express');
let path = require('path');
let cookieParser = require('cookie-parser');
let logger = require('morgan');
const cors = require('cors')
let indexRouter = require('./routes/index');
let app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'html');
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')));
let whitelist = [
'http://localhost:3000',
'http://localhost:8080'
]
let corsOptionsDelegate = function (req, callback) {
let corsOptions
if (whitelist.indexOf(req.header('Origin')) !== -1) {
corsOptions = {
origin: true,
} // reflect (enable) the requested origin in the CORS response
} else {
corsOptions = {
origin: false,
} // disable CORS for this request
}
callback(null, corsOptions) // callback expects two parameters: error and options
}
app.use(cors(corsOptionsDelegate))
app.options('*', cors())
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');
});
module.exports = app;