110 lines
3.3 KiB
JavaScript
110 lines
3.3 KiB
JavaScript
var PORT = 8080; //Set port for the app
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fs = require("fs-extra");
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var express = require('express');
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var formidable = require('formidable'); //form upload processing
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var s_whiteboard = require("./s_whiteboard.js");
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var app = express();
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app.use(express.static(__dirname + '/public'));
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var server = require('http').Server(app);
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server.listen(PORT);
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var io = require('socket.io')(server);
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console.log("Webserver & socketserver running on port:"+PORT);
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app.get('/loadwhiteboard', function(req, res) {
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var wid = req["query"]["wid"];
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var ret = s_whiteboard.loadStoredData(wid);
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res.send(ret);
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res.end();
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});
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app.post('/upload', function(req, res) { //File upload
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var form = new formidable.IncomingForm(); //Receive form
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var formData = {
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files : {},
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fields : {}
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}
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form.on('file', function(name, file) {
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formData["files"][file.name] = file;
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});
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form.on('field', function(name, value) {
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formData["fields"][name] = value;
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});
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form.on('error', function(err) {
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console.log('File uplaod Error!');
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});
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form.on('end', function() {
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progressUploadFormData(formData);
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res.send("done");
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//End file upload
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});
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form.parse(req);
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});
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function progressUploadFormData(formData) {
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console.log("Progress new Form Data");
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var fields = formData.fields;
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var files = formData.files;
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var whiteboardId = fields["whiteboardId"];
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var name = fields["name"] || "";
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var date = fields["date"] || (+new Date());
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var filename = whiteboardId+"_"+date+".png";
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fs.ensureDir("./public/uploads", function(err) {
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if(err) {
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console.log("Could not create upload folder!", err);
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return;
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}
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var imagedata = fields["imagedata"];
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if(imagedata && imagedata != "") { //Save from base64 data
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imagedata = imagedata.replace(/^data:image\/png;base64,/, "").replace(/^data:image\/jpeg;base64,/, "");
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console.log(filename, "uploaded");
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fs.writeFile('./public/uploads/'+filename, imagedata, 'base64', function(err) {
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if(err) {
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console.log("error", err);
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}
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});
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}
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});
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}
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io.on('connection', function(socket){
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socket.on('disconnect', function () {
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socket.broadcast.emit('refreshUserBadges', null); //Removes old user Badges
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});
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socket.on('drawToWhiteboard', function(content) {
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content = escapeAllContentStrings(content);
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socket.broadcast.to(content["wid"]).emit('drawToWhiteboard', content); //Send to all users in the room (not own socket)
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s_whiteboard.handleEventsAndData(content); //save whiteboardchanges on the server
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});
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socket.on('joinWhiteboard', function(wid) {
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socket.join(wid); //Joins room name=wid
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});
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});
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//Prevent cross site scripting
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function escapeAllContentStrings(content, cnt) {
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if(!cnt)
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cnt = 0;
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if(typeof(content)=="string") {
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return content.replace(/<\/?[^>]+(>|$)/g, "");
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}
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for(var i in content) {
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if(typeof(content[i])=="string") {
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content[i] = content[i].replace(/<\/?[^>]+(>|$)/g, "");
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} if(typeof(content[i])=="object" && cnt < 10) {
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content[i] = escapeAllContentStrings(content[i], ++cnt);
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}
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}
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return content;
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} |