server.js

var express = require('express');
var app = express();
var mongo = new (require("mongolian"))({log:{debug:function(){}}});
var mdb = mongo.db("IT353");
var db = {};

db.pastes = mdb.collection("pastes");

app.configure(function(){
	app.use(express.compress());
	app.use(express.static(__dirname + '/WebContent'));
	app.use(express.json());
});

var server = app.listen(8080);
var io = require('socket.io').listen(server);
// Available highlighting languages
var brushes = ["plain", "as3", "bash", "csharp", "cpp", "css", "diff", "js",
	"java", "pl", "php", "ps", "py", "ruby", "scala", "sql", "vb", "xml"];
	
/*
@GET
@Path("paste/{id}")
@Produces("application/json; charset=UTF-8")
*/
app.get('/rs/pastes/paste/:id', function(request, response){
	db.pastes.findOne({id: request.params.id}, function(error, paste){
		if(paste && !error){
			response.send({
				success: true,
				id: paste.id,
				type: paste.type,
				text: paste.text,
				title: paste.title,
				updated: paste.updated
			});
		}else
			send_error(response, "No such paste!");
	});
});

/*
@GET
@Path("recent/{num}")
@Produces("application/json; charset=UTF-8")
*/
app.get('/rs/pastes/recent/:num', function(request, response){
	get_recent_pastes(request.params.num, function(error, pastes){
		if(pastes && !error){
			response.send({
				success: true,
				pastes: pastes
			});
		}else
			send_error(response, "Couldn't load any pastes!");
	});
});

/*
@POST
@Path("new")
@Produces("application/json; charset=UTF-8")
@Consumes("application/json; charset=UTF-8")
*/
app.post('/rs/pastes/new', function(request, response){
	var text = request.body.text;
	if(text.trim().length > 0){
		var id = create_new_id();

		var type = request.body.type;
		if(!type || brushes.indexOf(type) === -1)
			type = brushes[0];

		var title = get_title(request.body.title, text);
		var password = create_new_password();

		var dataToInsert = {
			id: id,
			type: type,
			text: text,
			title: title,
			pass: password,
			updated: +new Date
		};

		db.pastes.insert(dataToInsert, function(error){
			if(error){
				console.log(error);
				send_error(response, "Unknown database error.");
			}else{
				send_recent_pastes();

				response.send({
					success: true,
					id: id,
					pass: password
				});
			}
		});
	}else
		send_error(response, "No text given!");
});

/*
@PUT
@Path("paste/{id}")
@Produces("application/json; charset=UTF-8")
@Consumes("application/json; charset=UTF-8")
*/
app.put('/rs/pastes/paste/:id/:pass', function(request, response){
	var text = request.body.text;
	var id = request.params.id;
	var pass = request.params.pass;
	db.pastes.findOne({id: id}, function(error, paste){
		if(paste && !error){
			if(pass === paste.pass){
				if(text.trim().length > 0){

					var type = request.body.type;
					if(!type || brushes.indexOf(type) === -1)
						type = brushes[0];

					var title = get_title(request.body.title, text);

					var dataToInsert = {
						type: type,
						text: text,
						title: title,
						updated: +new Date
					};

					db.pastes.update({id: id}, {$set: dataToInsert}, function(error){
						if(error){
							console.log(error);
							send_error(response, "Unknown database error.");
						}else{
							send_recent_pastes();

							response.send({
								success: true,
								id: id,
								pass: paste.pass
							});
						}
					});
				}else
					send_error(response, "No text given!");
			}else
				send_error(response, "Incorrect password.");
		}else
			send_error(response, "No such paste!");
	});
});

/*
@DELETE
@Path("paste/{id}/{pass}")
@Produces("application/json; charset=UTF-8")
*/
app.delete('/rs/pastes/paste/:id/:pass', function(request, response){
	db.pastes.findOne({id: request.params.id}, function(error, paste){
		if(paste && !error){
			if(request.params.pass === paste.pass){
				db.pastes.remove({id: request.params.id}, function(error){
					if(error){
						console.log(error);
						send_error(response, "Unknown database error.");
					}else{
						send_recent_pastes();
						response.send({success: true});
					}
				});
			}else
				send_error(response, "Incorrect password.");
		}else
			send_error(response, "No such paste!");
	});
});

function send_error(response, message){
	response.send({
		success: false,
		error: message
	});
}

function create_new_id(){
	return Math.random().toString(16).substr(2);
}

function create_new_password(){
	return Math.random().toString(36).substr(2);
}

function get_title(title, text){
	if(title && title.trim().length > 0)
		return title.trim();
	return text.split("\n")[0].trim().substr(0, 50); // First line of text
}

function get_recent_pastes(num, callback){
	var cursor = db.pastes.find(); // Look up all pastes
	cursor.sort({updated: -1});    // Sort by creation date
	cursor.limit(num);             // Limit to max number
	cursor.toArray(function(error, pastes){
		if(pastes && !error){
			var output = [];
			for(var i = 0; i < pastes.length; i++){
				var text = pastes[i].text.substr(0, 100);   // Shortened preview
				text = text.replace(/(\r\n|\n|\r)/gm, " "); // Remove line breaks
				text = text.replace(/\s+/g, " ").trim();    // Remove extra spaces
				output.push({
					type: pastes[i].type,
					text: text,
					id: pastes[i].id,
					title: pastes[i].title,
					updated: pastes[i].updated
				});
			}
			callback(error, output);
		}else
			callback(error, pastes);
	});
}

function send_recent_pastes(){
	get_recent_pastes(5, function(error, pastes){
		if(pastes && !error)
			io.sockets.emit('recent_pastes', pastes);
		else
			send_error(response, "Couldn't load any pastes!");
	});
}