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Version 2.50 is out since Jan 1st 2022


Frequently Asked Questions


Namespaces

Note for contributors

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Formatting Syntax

built_in:webserver

This is an old revision of the document!


WebServer control

Methods

Method Description
WebServer.AddServlet( path,callback )
Webserver.GetWebSockClients()
WebServer.SendText( txt, ip )
WebServer.SetFolder( folder )
WebServer.SetOnReceive( callback)
WebServer.SetResponse( text )
WebServer.Start()

Example

(Example taken from the DroidScript sample section)

//Called when application is started. 
function OnStart() 
{ 
	//Check wifi is enabled. 
	var ip = app.GetIPAddress(); 
	if( ip == "0.0.0.0" ) {  
		app.ShowPopup( "Please Enable Wi-Fi" );  
		app.Exit(); 
	} 
	//Create a layout with objects vertically centered. 
	lay = app.CreateLayout( "linear", "VCenter,FillXY" );	 
 
	//Create a text label and add it to layout. 
	var s = "Type the following address into your" +  
			" browser\n\n" + ip +":8080"; 
	txt = app.CreateText( s, 0.8, 0.5, "MultiLine" ); 
	txt.SetTextSize( 22 ); 
	lay.AddChild( txt ); 
 
	//Add layout to app.	 
	app.AddLayout( lay ); 
 
	//Create and run web server. 
	serv = app.CreateWebServer( 8080, "Upload,ListDir" ); 
	serv.SetFolder( "/sdcard/DroidScript" ); 
	serv.AddServlet( "/message", OnServlet ); 
	serv.Start(); 
} 
 
//Handle servlet requests. 
function OnServlet( request, info ) 
{ 
	serv.SetResponse( "Got it!" ); 
	app.ShowPopup(  info.remoteAddress + " says: " + request.msg ); 
} 

WebSocket Sample

running on DroidScript V 1.23b and higher

(Sample posted by Dave Smart in the DroidScript Beta Forum)

Create the following two files in one folder and call your folder “Web Sockets”

index.html
<html>
<head>
<title>WebSocket Demo</title>
 
<script>
 
var count = 0;
 
//Connect to server via web sockets.
function Connect()
{
	//Check web sockets are supported.
	if (!window.WebSocket) 
	{
		alert("WebSocket not supported by this browser");
		return;
	}
 
	//Open web socket to phone.
	ws = new WebSocket( "ws://"+window.location.host );
	ws.onopen = ws_onopen;
	ws.onmessage = ws_onmessage;
	ws.onclose = ws_onclose;
	ws.onerror = ws_onerror;
}
 
//Send a message to the server.
function Send()
{
	ws.send( "Hello " + count++ );
}
 
//Handle socket open.
function ws_onopen() 
{
	id_info.innerHTML = "Socket Open";
}
 
//Handle messages from phone.
function ws_onmessage( msg ) 
{
	id_info.innerHTML = msg.data;
}
 
//Other websocket callbacks.
function ws_onclose() { id_info.innerHTML = "Socket Closed"; }
function ws_onerror(e) { id_info.innerHTML = "Socket Error: " + e.data; }
</script>
</head>
 
<body>
 <h2>DroidScript WebSocket Demo</h2>
 
 <div id="id_info">Ready</div>
 <br><br>
 <button onclick="Connect()">Connect</button>
 <button onclick="Send()">Send Message</button>
 
</body>
</html>
Web Sockets.js
//Init variables.
var count = 0;
 
//Called when application is started.
function OnStart()
{
	//Check wifi is enabled.
	ip = app.GetIPAddress();
	if( ip == "0.0.0.0" ) { 
		app.ShowPopup( "Please Enable Wi-Fi" ); 
		app.Exit();
	}
 
	//Prevent wifi from powering down.
    app.PreventWifiSleep();
 
	//Create a layout with objects vertically centered.
	lay = app.CreateLayout( "linear", "VCenter,FillXY" );
 
	//Create a text label and add it to layout.
	var s = "Type the following address into your" + 
			" browser(s)\n\n" + ip +":8080";
	txt = app.CreateText( s, 0.8, 0.3, "AutoScale,MultiLine" );
	txt.SetTextSize( 22 );
	lay.AddChild( txt );
 
	//Create a text label and add it to layout.
	txtMsg = app.CreateText( "", 0.8, 0.3, "AutoScale,MultiLine" );
	txtMsg.SetTextSize( 22 );
	lay.AddChild( txtMsg );
 
	//Create a 'Send Message' button.
	btn = app.CreateButton( "Send Message", 0.4, 0.1 );
	btn.SetMargins( 0, 0.05, 0, 0 );
	btn.SetOnTouch( SendMessage );
	lay.AddChild( btn );
 
	//Add layout to app.	
	app.AddLayout( lay );
 
	//Create and run web server on port 8080.
    serv = app.CreateWebServer( 8080 );
    serv.SetFolder( "/sdcard/DroidScript/Web Sockets" );
    serv.SetOnReceive( serv_OnReceive );
    serv.Start();
 
	//Start timer to show WebSock connections.
	setInterval( ShowConnections, 3000 );
}
 
//Show who is connected.
function ShowConnections()
{
	var clients = serv.GetWebSockClients();
 
	if( clients.length > 0 )
	{
    	//Make a list of clients.
    	var list = "";
    	for( var i=0; i<clients.length; i++ )
    	    list += clients[i].remoteAddress + "\n";
 
    	//Show client list.
    	txt.SetText( list );
	}
}
 
//Send a message to all connected socket clients.
function SendMessage()
{	
    //Note: You can send to a specific client by passing
    //the IP address as the second parameter.
	serv.SendText( "Hello " + count++ )
}
 
//Called when messages arrive from websocket clients.
function serv_OnReceive( msg, ip )
{
    txtMsg.SetText( ip + ": " + msg );
}
built_in/webserver.1436446290.txt.gz · Last modified: 2015/07/09 20:51 (external edit)