source: other-projects/bib-stinky/trunk/nodejs-server/express-web-server.js@ 36333

// Setup Express
const path      = require('path');
const { spawn } = require('child_process');

const express = require("express");
const cors    = require("cors");


const app = express();

const port       = process.env.PORT || 3000;
const public_dir = path.join(__dirname, 'public')


app.use(cors());
app.use('/', express.static(public_dir))

//// To help with POST and PUT requests to the server
//app.use(express.json());
//app.use(express.urlencoded({ extended: true }));


app.get("/", (req, res) => {
    res.redirect("/index.html");
});


app.get("/api/get-doi", (req, res) => {
    var doi = req.query.doi;

    var dataToSend;

    // Spawn new child process to call the python script
    const python = spawn('python3', ['doi-stinky/oacore-get-doi.py', doi, "oacore-output.json"]);
    
    // Collect data from script
    python.stdout.on('data', function (data) {
    console.log('Pipe data from python script ...');
    dataToSend = data.toString();
    });
    
    // In close event we are sure that stream from child process is closed
    python.on('close', (code) => {
    console.log(`child process close all stdio with code ${code}`);
    
    //res.send(dataToSend)
    res.sendFile("oacore-output.json", { root: __dirname });    
    });    
});


app.listen(port, () => {
  console.log(`Started CORS-enabled Express web server running on port ${port}.`);
});