Here's a simple pug file
p Hello
The backend is ordinary node, express, passport, sql so something like
app.get('/example', (request, response) => {
response.render('example.pug');
})
I want the web page to
Connect to a websocket server
Any text that arrives, simply display that where the 'Hello' is
How to do this?
(So, TBC the server looks something like this ... I can easily do that end of it.)
function sendInfoToAnyBrowserConnected() {
connections.forEach(function tell(c) {
if (c.readyState == WebSocket.OPEN) {
c.send("this text gets displayed")
What should I put in my pug file?
I've had to figure it out myself - damn you, SO! Essentially this
<a id="log" size=10></a>
with this
var el = document.getElementById("log");
and this
el.innerHTML = el.innerHTML + "<br>" + e.data;
and that's it.
So in total basically
<html>
<head>
<script type="text/javascript">
function VanillaData() {
var ws = new WebSocket("ws://ws.yours.com:2345");
ws.onopen = function() { ws.send("from www ,v1"); };
ws.onmessage = function(e) {
el.innerHTML = el.innerHTML + "<br>" + e.data;
};
ws.onclose = function() { console.log("ws closed..."); };
}
</script>
</head>
<body>
Your live stuff:
<br>
<a id="log" size=10></a>
<script type="text/javascript">
var el = document.getElementById("log");
VanillaData()
</script>
</body >
</html >
I'm not knowledgeable about pug, so cannot comment on how the .pug file should look.
Using an online html-pug convertor, this does work:
head
script(type='text/javascript').
function VanillaData() {
var ws = new WebSocket("ws://you.com:2345");
ws.onopen = function() { ws.send("from www"); };
ws.onmessage = function(e) {
el.innerHTML = e.data + "<br>" + el.innerHTML;
};
ws.onclose = function() { console.log("ws closed ..."); };
}
| Live stuff:
br
pre#log(size='10').
script(type='text/javascript').
var el = document.getElementById("log");
VanillaData()
Seems to work great.
Related
I am new to handlebars.js and I am trying to display a JSON response with this API https://yts.am/api/v2/list_movies.json
I try to use static and basic JSON data, it is working but when I try to load huge amount I get error
<!DOCTYPE html>
<html>
<head>
<title>Hello World</title>
</head>
<body>
<h1 id="title"></h1>
<hr>
<div id="result"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/3.0.1/handlebars.min.js"></script>
<script id="text-template-yts" type="text/x-handlebars-template">
<h2>{{title}}</h2>
<h3>{{summary}}</h3>
<ul>
{{#each torrents}}
<li>{{quality}}</li>
{{/each}}
</ul>
</script>
<script>
function ajax_get(url, callback) {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
console.log('responseText:' + xmlhttp.responseText);
try {
var data = JSON.parse(xmlhttp.responseText);
} catch (err) {
console.log(err.message + " in " + xmlhttp.responseText);
return;
}
callback(data);
}
};
xmlhttp.open("GET", url, true);
xmlhttp.send();
}
ajax_get('https://yts.am/api/v2/list_movies.json', function (data) {
document.getElementById("title").innerHTML = data["status_message"];
var source = document.getElementById('text-template-yts').innerHTML;
var template = Handlebars.compile(source);
var html = template(data.data.movies);
document.getElementById("result").innerHTML = html;
});
</script>
</body>
</html>
I was able to get the query success but in parsing is error
FIXED
I need to add the each of handlebars
I'm trying to implement a websocket-server with Progress OpenEdge. I still didn't get it working.
I've successfully created a socket-server with the example i-sktsv1.p from here.
When I run my html-page, which looks like:
<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8" />
<title>WebSocket Client</title>
<script language="javascript" type="text/javascript">
var wsUri = "ws://localhost:3333/";
var output;
function init() {
output = document.getElementById("output");
testWebSocket();
}
function testWebSocket() {
websocket = new WebSocket(wsUri);
websocket.onopen = function(evt) { onOpen(evt) };
// websocket.onclose = function(evt) { onClose(evt) };
websocket.onmessage = function(evt) { onMessage(evt) };
websocket.onerror = function(evt) { onError(evt) };
}
function onOpen(evt) {
writeToScreen("CONNECTED");
doSend("WebSocket rocks");
}
function onClose(evt) {
writeToScreen("DISCONNECTED");
}
function onMessage(evt) {
writeToScreen('<span style="color: blue;">RESPONSE: ' + evt.data+'</span>');
websocket.close();
}
function onError(evt) {
writeToScreen('<span style="color: red;">ERROR:</span> ' + evt.data);
}
function doSend(message) {
writeToScreen("SENT: " + message);
websocket.send(message);
}
function writeToScreen(message) {
var pre = document.createElement("p");
pre.style.wordWrap = "break-word";
pre.innerHTML = message;
output.appendChild(pre);
}
window.addEventListener("load", init, false);
</script>
<body>
<h2>WebSocket Test</h2>
<div id="output"></div>
</body>
</html>
I getting a error that the websocket connection could not be established.
The problem is (I think) that Progress offers a socket, not a websocket. Do you know how to get this working?
Thanks for any help.
Using jsdom, I'm trying to load a local HTML file, which itself loads a local JS file.
import jsdom from 'jsdom-no-contextify'
var fs = require('fs');
var path = require("path");
var html = fs.readFileSync(path.join(__dirname, '../src/', 'launcher.html'));
global.document = jsdom.jsdom(html, {
FetchExternalResources: ['script'],
ProcessExternalResources: ['script'],
created: function (error, window) {
console.log("created: " + error);
},
url: "file://mydir/src/js/helloworld.js"
});
global.window = document.parentWindow;
window.addEventListener('load', function () {
});
launcher.html itself sources helloworld.js i.e.
<script type="text/javascript" src="js/helloworld.js"></script>
However I can't access or read any variables inside helloworld.js
Regards, Sam
you need to add the runsScripts and resources properties as below
global.document = jsdom.jsdom(html, {
FetchExternalResources: ['script'],
ProcessExternalResources: ['script'],
created: function (error, window) {
console.log("created: " + error);
},
url: "file://mydir/src/js/helloworld.js",
runScripts: "dangerously",
resources:'usable'
});
I would not like to call asp.net server side code with jquery $.ajax .
So I have written a pure javascript ajax file .But when I call webmethod,this do not work.
Can anyony help me out how correct this? THANK you very much .
ajax.js:
var ajax = {
_params: null,
_callback: null,
_xhr: null,
_createXHR: function () {
if (window.ActiveXObject) {
_xhr = new ActiveXObject("Microsoft.XMLHTTP"); //IE
}
else if (window.XMLHttpRequest) {
_xhr = new XMLHttpRequest(); //FireFox,Chrome et.
}
},
_ajaxcallback: function () {
if (_xhr.readyState == 4) {
if (_xhr.status == 200) {
_callback.call(this, _xhr.responseText)
}
}
},
_changeParams: function () {
var args = arguments[0];
var s = "";
for (var i in args) {
s += "&" + i + "=" + args[i];
}
_params = s;
},
get: function (url, params, callback) {
_callback = callback;
ajax._createXHR();
ajax._changeParams(params);
if (null != _xhr) {
_xhr.open('get', url + '?' + _params, true);
_xhr.onreadystatechange = ajax._ajaxcallback;
_xhr.send();
}
},
post: function (url, params, callback) {
_callback = callback;
ajax._createXHR();
ajax._changeParams(params);
if (null != _xhr) {
_xhr.open('post', url, true);
_xhr.onreadystatechange = ajax._ajaxcallback;
_xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
_xhr.send(_params);
}
}
}
WebForm1.aspx
<head runat="server">
<title></title>
<script src="ajax.js" type="text/javascript"></script>
<script type="text/javascript">
function ajaxtest() {
var uid = document.getElementById("txtuid").value;
var pwd = document.getElementById("txtpwd").value;
ajax.post("WebForm1.aspx/GetModel", "{ 'uid':" + uid + ", 'pwd':" + pwd + " }", function (data) {
alert(data);
});
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input type="text" id="txtuid" value="eeee" />
<input type="text" value="222" id="txtpwd" onblur="ajaxtest()"/>
WebForm1.cs:
[WebMethod]
public static string GetModel(string uid,string pwd)
{
return "1";
}
In your markup you need to have a ScriptManager with EnablePageMethods set to true. Doing this will ensure you can call the methods you have marked up with [WebMethod].
In your JavaScript you can then call your method like this: PageMethods.GetModel("userName", "password", OnSuccessMethod, OnFailureMethod); - you won't need any of the ActiveXObject/XmlHttpRequest stuff if you do it this way, which keeps things much simpler.
Use AJAX.PRO from Michael Schwarz --> http://www.ajaxpro.info/
I am trying to get nowelium / socket.io-titanium to work i have it working on the device but on website i get the following error in my console
XMLHttpRequest cannot load http://127.0.0.1:8080/socket.io/1/?t=1345807417891. Cannot use wildcard in Access-Control-Allow-Origin when credentials flag is true.
I am using socket.io here is the chat.js server
var io = require('socket.io').listen(8080);
var archiveMessages = {};
var channels = ['foo channel', 'bar channel'];
var chat = io.of('/chat');
chat.on('connection', function(socket){
console.log('connected: %s', socket.id);
// push available channel list
socket.emit('available_channel', channels);
socket.on('join', function(value){
console.log('%s joined channel: %s', socket.id, value.channelId);
socket.join(value.channelId);
socket.set('channel_id', value.channelId, function(){
var messages = archiveMessages[value.channelId] || [];
socket.emit('joined', messages);
socket.broadcast.to(value.channelId).emit('user:join', {
id: socket.id
});
});
});
socket.on('post', function(message){
socket.get('channel_id', function(err, channelId){
console.log('%s says<%s channel>: %s', socket.id, channelId, message);
if(!(channelId in archiveMessages)){
archiveMessages[channelId] = [];
}
archiveMessages[channelId].push(message);
socket.emit('posted', {
message: message
});
socket.broadcast.to(channelId).emit('user:message', {
id: socket.id,
message: message
});
});
});
socket.on('disconnect', function(){
console.log('%s disconnected', socket.id);
socket.get('channel_id', function(channelId){
socket.leave(channelId);
socket.broadcast.to(channelId).emit('user:leave', {
id: socket.id
});
});
});
});
var image = io.of('/image');
image.on('connection', function(socket){
socket.on('upload', function(param){
console.log('upload base64 size: %d', param.base64.length);
if(param.download){
socket.emit('download', {
base64: 's' + new Array(65534).join('0') + 'e'
});
}
});
});
and here is the index.html i am running
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="height=device-height, width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<title>chat sample</title>
<style>
#rooms button {
display: block;
}
</style>
<script type="text/javascript" src="http://localhost:8080/socket.io/dist/socket.io.js"></script>
<script type="text/javascript">
var $ = function(id){
return document.getElementById(id);
};
window.addEventListener('load', function (){
var socket = io.connect('127.0.0.1:8080');
var chat = socket.of('/chat');
console.log(chat);
chat.on('available_channel', function(channels){
channels.forEach(function (channelId){
var button = document.createElement('button');
button.appendChild(document.createTextNode(channelId));
$('rooms').appendChild(button);
button.addEventListener('click', function(){
$('chat').style.display = '';
chat.emit('join', {
channelId: channelId
});
});
});
});
var addMessage = function(message){
var li = document.createElement('li');
li.appendChild(document.createTextNode(message));
$('messages').appendChild(li);
};
chat.on('joined', function(messages){
messages.forEach(function(message){
var li = document.createElement('li');
li.appendChild(document.createTextNode(message));
$('archives').appendChild(li);
});
});
chat.on('posted', function(value){
return addMessage('you posted: ' + value.message);
});
chat.on('user:join', function(value){
return addMessage(value.id + ' joined this channel');
});
chat.on('user:leave', function(value){
return addMessage(value.id + ' leaved this channel');
});
chat.on('user:message', function(value){
return addMessage(value.id + ' says ' + value.message);
});
$('submit').addEventListener('click', function (){
var messageValue = $('message').value;
if(/^\s+$/.test(messageValue)){
return;
}
chat.emit('post', messageValue);
$('message').value = '';
});
});
</script>
</head>
<body>
<div id="rooms">
</div>
<div id="chat" style="display:none">
<input type="text" id="message" value="" placeholder="message here" />
<input type="submit" id="submit" value="send" />
<p>archives</p>
<ul id="archives" style="color: #999"></ul>
<p>messages</p>
<ul id="messages"></ul>
</div>
</body>
</html>
CAn anyone tell me why this might be happening???
I wonder if switching it to localhost would fix that.
I researched into Access-Control-Allow-Origin and traced it to the web browser as the culprit if I remember correctly. I eventually started looking for a way to disable the browser from checking for that. In Chrome this is my shortcut path.
...Chrome\Application\chrome.exe --allow-file-access-from-files --disable-web-security
See if that works. I don't know if it really remedies the issue as much as it just suppresses the problem. If you were calling the web page from the host you were trying to access I don't think you'd have this problem at all. For example, when I attempt to access my web service on mydomain.com using the web page mydomain.com/myprogram.html it doesn't complain about cross domain access.