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const fs = require('fs');
const path = require('path');
const express = require('express');
const bodyParser = require('body-parser');
const opn = require('opn');
const ip = require('ip');
const app = express();
const options = process.argv.reduce((acc, arg) => {
const pair = arg.split('=');
if (pair.length === 2) {
acc[pair[0]] = pair[1];
}
return acc;
}, {});
const handleAnnotation = (req, res, handler) => {
const dir = path.resolve(__dirname, 'annotations');
if (!fs.existsSync(dir)) {
fs.mkdirSync(dir);
}
handler(dir);
res.end();
};
app.use(bodyParser.json()); // for parsing application/json
app.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded
app.get('/annotations', (req, res) => {
handleAnnotation(req, res, (dir) => {
const xfdfFile = (req.query.did) ? path.resolve(dir, `${req.query.did}.xfdf`) : path.resolve(dir, 'default.xfdf');
if (fs.existsSync(xfdfFile)) {
res.header('Content-Type', 'text/xml');
res.send(fs.readFileSync(xfdfFile));
} else {
res.status(204);
}
});
});
app.post('/annotations', (req, res) => {
handleAnnotation(req, res, (dir) => {
const xfdfFile = (req.body.did) ? path.resolve(dir, `${req.body.did}.xfdf`) : path.resolve(dir, 'default.xfdf');
try {
res.send(fs.writeFileSync(xfdfFile, req.body.data));
} catch (e) {
res.status(500);
}
});
res.end();
});
app.get('/ip', (req, res) => {
res.send(ip.address());
});
app.get('/', (req, res) => {
res.redirect('/samples');
});
app.get(/\/samples(.*)(\/|\.html)$/, (req, res, next) => {
if (req.query.key || !options.key) {
next();
} else if (req.originalUrl.slice(-10) === 'index.html') {
res.redirect(`${req.originalUrl}?key=${options.key}`);
} else {
res.redirect(`./index.html?key=${options.key}`);
}
});
app.use(express.static(path.resolve(__dirname), {
setHeaders: (res) => {
res.set('Service-Worker-Allowed', '/');
},
}));
app.listen(3000, '0.0.0.0', (err) => {
if (err) {
console.error(err);
} else {
console.info(`Listening at localhost:3000 (http://${ip.address()}:3000)`);
if (process.argv[2] === 'samples') {
opn('http://localhost:3000/samples');
} else if (process.argv[2] === 'doc') {
opn('http://localhost:3000/doc/PDFTron.WebViewer.html');
}
}
});