I keep getting the same errors
GET http://localhost:3000/star.png 404 (Not Found)
Phaser.Loader - image[star]: error loading asset from URL ./star.png
Phaser.Cache.getImage: Key "star" not found in Cache.
But I am not loading the asset incorrectly. Here is my code:
var express = require('express');
var app = express();
var fs = require('fs');
app.get('/', function(req, res) {
var index = fs.readFileSync('./index.html', "utf8");
res.send(index);
});
var server = app.listen(3000, function() {
var host = server.address().address;
var port = server.address().port;
console.log('Example app listening at http://%s:%s', host, port);
});
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Phaser</title>=
</head>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/phaser/2.4.4/phaser.js"></script>
<script type="text/javascript">
var game = new Phaser.Game(800, 600, Phaser.AUTO, '', {
preload: preload,
create: create,
update: update
});
function preload() {
game.load.image('star', './star.png');
};
function create() {
game.add.sprite(0, 0, 'star');
};
function update() {};
</script>
</body>
</html>
Here is my PATH for this game:
/home/me/dev/games/phaser
I have all my files (three files, app.js, index.html, and star.png) in the same directory (phaser). Why the heck does it not grab the .png file??? Am I not linking to it correctly? It's sitting right there, why does the GET request not grab it? Why does phaser.loader throw an error? I have tried a hundred different things but it just won't load. It's getting really frustrating.
You are only hosting 1 route (/) - you need to serve the assets with a static server. See http://expressjs.com/starter/static-files.html
Using game.load.image() just adds to the loader queue.
You need to execute game.load.start() to actually kick the loading sequence off.
Related
This is my server side code for creating connection to the socket.I am using node.js code and using socket.io in that.
const path = require('path');
const http = require('http');
const express = require('express');
const socketIO = require('socket.io');
const port = process.env.PORT || 3000;
var app = express();
var server = http.createServer(app);
var io = socketIO(server);
io.on('connection', (socket) => {
console.log('New user connected');
})
and this is my client side code i am using plain javascript as a client and I am using 2.1.1 version of socket.io, I am getting io not defiend error,I am very new to socket.io please help me one this one.
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0">
<meta charset="utf-8">
</head>
<body>
<script>
$(document).ready(function(){
var socket = io('http://localhost:3000');
console.log("Socket connected"+socket.connected);
socket.on('notification', function(value){
//insert your code here
});
});
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
<script src="http://localhost:3000/socket.io/socket.io.js"></script>
</body>
</html>
Your first script (the one using io) is running before your other scripts (the jQuery and Socket scripts). Move your scripts around like so:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
<script src="http://localhost:3000/socket.io/socket.io.js"></script>
<script>
$(document).ready(function() {
var socket = io('http://localhost:3000');
console.log("Socket connected" + socket.connected);
socket.on('notification', function(value) {
//insert your code here
});
});
</script>
As I'm new to web development this might be wrong, but I would try to place your script below the script where you import socket.io.js
In your function you are calling io but before you call it it doesn't seem to be declared.
Hope this works.
I have been working on node.js project. my requirement is I want to load.txt file on browser. when I change and save this file, content should be updated. Browser should be auto refresh.
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
index.js
app.get('/', function(req, res){
res.sendFile(__dirname + '/demo.txt');
});
io.on('connection', function(socket){
console.log('a user connected');
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
var io = require('socket.io')(80);
var fs = require('fs');
fs.watchFile('message.text', (curr, prev) => {
console.log(`the current mtime is: ${curr.mtime}`);
console.log(`the previous mtime was: ${prev.mtime}`);
// file changed push this info to client.
io.emit('fileChanged', 'yea file has been changed.');
});
index.html
<script>
var socket = io();
socket.on('fileChanged', function(msg){
alert(msg);
});
First of all you can do this with two action:
1. Watch file change on server-side. And push info to client
You can watch file with node.js.
var app = require('express')();
var http = require('http').Server(app);
app.get('/', function(req, res){
res.sendFile(__dirname + '/cluster.json');
});
const io = require('socket.io')(http);
io.on('connection',function (client) {
console.log("Socket connection is ON!");
});
http.listen(80, function(){
console.log('listening on *:80');
});
var fs = require('fs');
fs.watchFile('cluster.json', function(curr, prev){
// file changed push this info to client.
console.log("file Changed");
io.emit('fileChanged', 'yea file has been changed.');
});
2. Catch "file changed" info and refresh page on client side
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<script type="text/javascript" src="node_modules/socket.io-client/dist/socket.io.js"></script>
<script>
var socket = io("http://localhost:80");
socket.on('fileChanged', function(msg){
alert(msg);
});
</script>
</body>
</html>
The best way to do this is using WebSockets. A very good package to work with WebSockets is Socket.io, and you can use something like chokidar or the native function fs.watch to watch the file changes and then emit an messsage.
Or if you trying to do this only for development purposes, you should check webpack, gulp or other task runner that have built-in functions to do this.
Do polling for the file using Ajax. Your server could respond with {changes: '{timestamp-of-file-modify}'}. Now check if your last seen change time differs from response time.
If there is changes: window.location.reload
Unresolved function or method get().
I'm new in js and node and I got stuck with this while trying to make a chat using sockets. Here is the code:
.js
var express = require('express');
var app = express();
var server = require('http').createServer(app);
var io = require('socket.io').listen(server);
server.listen(8888);
app.get('/', function (req, res) {
res.sendFile(__dirname + '/index.html');
});
io.sockets.on('connection', function (socket) {
socket.on('send message', function (data) {
io.sockets.emit('new message', data);
});
});
.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>glupi chat</title>
<style>
#chat{
height: 500px;
}
</style>
</head>
<body>
<div id="chat"></div>
<form id="send-message">
<input size="35" id="message">
<input type="submit">
</form>
<script src='jquery-3.2.1.js'></script>
<script src="/socket.io/socket.io.js"></script>
<script>
$document.ready(function () {
var socket = io.connect();
var $messageForm = $('#send-message');
var $messageBox = $('#message');
var $chat = $('#chat');
$messageForm.submit(function (e) {
e.preventDefault();
socket.emit('send message', $messageBox.val());
$messageBox.val('');
});
socket.on('new message', function (data) {
$chat.append(data + "<br/>");
});
});
</script>
</body>
</html>
I'm using IntelliJ IDEA, I have every module and library that I need installed.
It appears that you have no route for the jQuery file you specify with this:
<script src='jquery-3.2.1.js'></script>
A nodejs express server does not server ANY files by default so unless you have a general purpose route for your static files or a specific file for that jQuery file, your express server will not know how to serve that file when the browser requests it.
You have several possible choices for how to fix that:
Change the jQuery URL in the script tag in your web page to point to one of the public CDNs for jQuery. There are often performance advantages to doing this. For example, you could change to this: <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>.
Use express.static() on your server to configure a directory of static assets that will be automatically served by express when requested by the browser.
Create a specific route for the jQuery file just like you did with your exist app.get('/', ...)that responds to the/` GET request.
When I execute the following code, I get the error: Reference Error: Watershed is not defined. How can I define it? Do I need a module to be installed for it?
var restify=require('restify');
var ws= new Watershed();
var server=restify.createServer();
server.get('websocket/attach', function upgradeRoute(req, res, next){
if(!res.claimUpgrade){
next(new Error("Connection must be upgraded."));
return;
}
var upgrade=res.claimUpgrade();
var shed=ws.accept(req, upgrade.socket, upgrade.head);
shed.on('text', function (msg){
console.log("The message is: "+msg);
});
shed.send("hello there");
next(false);
});
server.listen(8081, function(){
console.log('%s listening at %s', server.name, server.url);
});
There is also a section of the restify doc that mentioned how to handle the ability to upgrade sockets. I just struggled with this for an emarrassingly long time and thought I'd share the simple solution. In addtion the #Dibu Raj reply, you also need to create your restify server with the handleUpgrades option set to true. Here is a complete example to make restify work with websocket upgrades and watershed:
'use strict';
var restify = require('restify');
var watershed = require('watershed');
var ws = new watershed.Watershed();
var server = restify.createServer({
handleUpgrades: true
});
server.get('/websocket/attach', function (req, res, next) {
if (!res.claimUpgrade) {
next(new Error('Connection Must Upgrade For WebSockets'));
return;
}
console.log("upgrade claimed");
var upgrade = res.claimUpgrade();
var shed = ws.accept(req, upgrade.socket, upgrade.head);
shed.on('text', function(msg) {
console.log('Received message from websocket client: ' + msg);
});
shed.send('hello there!');
next(false);
});
//For a complete sample, here is an ability to serve up a subfolder:
server.get(/\/test\/?.*/, restify.serveStatic({
directory: './static',
default: 'index.html'
}));
server.listen(8080, function() {
console.log('%s listening at %s', server.name, server.url);
});
For an html page to test your new nodejs websocket server: write this html below into a file at ./static/test/index.html - point your browser to http://localhost:8080/test/index.html - open your browser debug console to see the message exchange.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Web Socket test area</title>
<meta name="description" content="Web Socket tester">
<meta name="author" content="Tim">
</head>
<body>
Test Text.
<script>
(function() {
console.log("Opening connection");
var exampleSocket = new WebSocket("ws:/localhost:8080/websocket/attach");
exampleSocket.onopen = function (event) {
console.log("Opened socket!");
exampleSocket.send("Here's some text that the server is urgently awaiting!");
};
exampleSocket.onmessage = function (event) {
console.log("return:", event.data);
exampleSocket.close();
}
})();
</script>
</body>
</html>
Your browser log will look something like this:
07:05:05.357 index.html:18 Opening connection
07:05:05.480 index.html:22 Opened socket!
07:05:05.481 index.html:26 return: hello there!
And your node log will look like:
restify listening at http://[::]:8080
client connected!
Rest service called started
upgrade claimed
Received message from websocket client: Here's some text that the server is urgently awaiting!
Documentation for this found at:
http://restify.com/#upgrade-requests
You should include the watershed library
var Watershed = require('lib/watershed').Watershed;
I have a script that takes a picture from my webcam.
it's working fine when i runs locally or when i see in a online server.
But when i run the html file from the node.js, it doesnt show the view from my webcam.
how to fix that?
MY SERVER IN NODE:
// app.js
var http = require('http');
var fs = require('fs');
sys = require('util');
var server = http.createServer(function(request, response){
fs.readFile(__dirname + '/index.html', function(err, html){
console.log("oi");
response.writeHeader(200, {'Content-Type': 'text/html'});
response.write(html);
response.end();
});
});
server.listen(3000, function(){
console.log('Executando Servidor HTTP');
});
MY HTML:
<!DOCTYPE html>
<html>
<head>
<title>Javascript Webcam Demo - <MyCodingTricks/></title>
</head>
<body>
<h3>Demonstrates simple 320x240 capture & display</h3>
<div id="my_camera"></div>
<!-- A button for taking snaps -->
<form>
<input type=button class="btn btn-success" value="Take Snapshot" onClick="take_snapshot()">
</form>
<div id="results" class="well">Your captured image will appear here...</div>
<!-- First, include the Webcam.js JavaScript Library -->
<script type="text/javascript" src="2/webcam.min.js"></script>
<!-- Configure a few settings and attach camera -->
<script language="JavaScript">
Webcam.set({
width: 320,
height: 240,
image_format: 'jpeg',
jpeg_quality: 90
});
Webcam.attach( '#my_camera' );
function take_snapshot() {
// take snapshot and get image data
Webcam.snap( function(data_uri) {
// display results in page
document.getElementById('results').innerHTML =
'<h2>Here is your image:</h2>' +
'<img src="'+data_uri+'"/>';
Webcam.upload( data_uri, 'upload.php', function(code, text) {
// Upload complete!
// 'code' will be the HTTP response code from the server, e.g. 200
// 'text' will be the raw response content
});
} );
}
</script>
</body>
</html>
Your program seems to be sending the content of index.html for every request (for html, icons, scripts, etc.). Maybe try using express to serve static files properly:
var express = require('express');
var app = express();
app.use('/', express.static(__dirname));
app.listen(3000, function(){
console.log('Executando Servidor HTTP');
});
It's even easier than the way you want to write it, because to make your script work you would have to manually route the requests based on the request object to properly send scripts and different assets, make sure to handle MIME types, paths like ../.. etc.
Also you may want to move your static files (html, css, js) to a different directory like static and change the app.js like this:
var express = require('express');
var app = express();
app.use('/', express.static(__dirname + '/static'));
app.listen(3000, function(){
console.log('Executando Servidor HTTP');
});
so that no one will be able to get your app.js code by browsing to: http://localhost:3000/app.js