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server.js
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server.js
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/* eslint-disable no-console */
const express = require('express');
const compression = require('compression');
require('dotenv').config();
// Eventually, this mime type configuration will need to change.
// https://github.com/visionmedia/send/commit/d2cb54658ce65948b0ed6e5fb5de69d022bef941
// Any changes made here must be mirrored in web.config.
const { mime } = express.static;
mime.define({
'application/json': ['czml', 'json', 'geojson', 'topojson'],
'image/crn': ['crn'],
'image/ktx': ['ktx'],
'model/gltf+json': ['gltf'],
'model/gltf.binary': ['bgltf', 'glb'],
'text/plain': ['glsl'],
});
const app = express();
app.use(compression());
app.use((req, res, next) => {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
next();
});
app.use(express.static('public'));
// Insecure workaround to avoid having to push API key to repo.
// Serves API key directly to front end.
app.get('/key', (req, res) => {
const key = process.env.CESIUM_ION_KEY;
if (key) {
res.setHeader('Content-Type', 'text/javascript');
res.send(`Cesium.Ion.defaultAccessToken = '${key}';`);
} else {
// Cesium Ion will fall back to default token.
res.setHeader('Content-Type', 'text/javascript');
res.send('');
}
});
const port = 8080;
const server = app.listen(port, () => {
console.log(`Server started on port ${port}`);
});
server.on('error', (e) => {
console.log(e);
process.exit(1);
});
server.on('close', () => {
console.log('Server stopped.');
});
let isFirstSig = true;
process.on('SIGINT', () => {
if (isFirstSig) {
console.log('Server shutting down.');
server.close(() => {
process.exit(0);
});
isFirstSig = false;
} else {
console.log('Server force kill.');
process.exit(1);
}
});