85 lines
1.6 KiB
JavaScript
85 lines
1.6 KiB
JavaScript
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// server.js
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// import express ()
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var express = require('express'); // npm install --save express
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var app = express();
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// import node.js http
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var server = require('http').Server(app);
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// import socket.io
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var io = require('socket.io')(server); // npm install --save socket.io
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// import natural
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var natural = require('natural');
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function measure_term(term, array_documents, callback) {
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var tfidf = new natural.TfIdf();
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for(var doc of array_documents) {
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tfidf.addDocument(doc);
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}
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var measures = [];
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tfidf.tfidfs(term, function(i, m) {
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measures.push(m);
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if(i == array_documents.length - 1) {
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callback(measures);
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}
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});
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}
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/* ----------------------------------
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Server and Socket Configuration
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--------------------------------------*/
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// tell express to server our index.html file
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app.get('/', function (req, res) {
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res.sendFile(__dirname + '/index.html');
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});
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// configure socket.io
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// (1) when there is a connection
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io.on('connection', function(socket) {
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console.log('got a connection');
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// (2) configure the connected socket to receive custom messages
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socket.on('measure term', function(msg) {
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measure_term(msg.term, msg.documents, function(measures) {
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io.emit('term results', { term: msg.term, measures: measures});
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});
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});
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socket.on('disconnet', function() {
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console.log('got a disconnection');
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});
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});
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/* -------------------
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Start the server
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----------------------*/
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// listen to connection on port 8088 --> http://localhost:8088
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server.listen(8088, function () {
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console.log('listening on port: ' + 8088);
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});
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