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server.js
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const express = require('express');
const multer = require('multer');
const fs = require('fs');
const bodyParser = require('body-parser');
const http = require('http');
const path = require('path');
const crypto = require('crypto');
const conf = require('./config.json');
// Initialize the web server and its routing
let app = express();
let server = http.createServer(app);
let storage = multer.diskStorage({
destination: '.data/data/',
filename: function (req, file, cb) {
crypto.pseudoRandomBytes(16, function (err, raw) {
if (err) return cb(err)
cb(null, raw.toString('hex') + path.extname(file.originalname));
});
}
});
let upload = multer({ storage: storage });
// Datastore
var choices = [];
var filenames = [];
var dataset = [];
// listen for requests
server.listen(process.env.PORT);
// Configure some middleware
app.use(bodyParser.urlencoded({ extended: true }));
app.use(express.static('public'));
app.use(express.static('.data'));
// Routes
app.get("/", function (request, response) {
response.sendFile(__dirname + '/views/drop.html');
});
app.get('/classify', function(request, response) {
response.sendFile(__dirname + '/views/classify.html');
});
app.post('/classify', function(request, response) {
var id = request.body.id,
choice = request.body.choice;
choices[id] = choice;
var ids = [];
for (var i = 0; i < dataset.length; i++) {
if (typeof choices[i] === 'undefined')
ids.push(i);
}
if (ids.length === 0) {
response.redirect('/results');
}
response.redirect('back');
});
app.post('/new_data', upload.array('file'), function(request, response) {
for (var i = 0; i < request.files.length; i++) {
var file = request.files[i];
if (filenames.indexOf(file.originalname) < 0) {
dataset.push(file);
filenames.push(file.originalname);
}
}
response.redirect('/classify');
});
app.get('/results', function(request, response) {
var results = {};
for (var i = 0; i < dataset.length; i++) {
var name = filenames[i],
choice = choices[i];
results[name] = choice;
}
response.send(results);
});
app.get('/question', function(request, response) {
var ids = [],
id;
for (var i = 0; i < dataset.length; i++) {
if (typeof choices[i] === 'undefined')
ids.push(i);
}
if (ids.length === 0) {
response.redirect('/results');
}
id = ids.sort( function() { return 0.5 - Math.random() } )[0];
response.send({
id: id,
image: dataset[id].filename,
labels: conf.labels
});
});