ProcessingJS and using Network library (Client class) to load external web page

Nard

Hi,

I'm porting my processing app to processingJS so it can be used from any device like a smartphone. My app downloads/scrapes info from a external webpage. With the processing app, the following code works:

import processing.net.*; 
Client myClient;
String IPaddressString = "www.processing.org";//processing

void setup(){
  String dataIn;
  try{
    myClient = new Client(this, IPaddressString, 80);
    myClient.write("GET / HTTP/1.1\r\n");
    myClient.write("Host: www.processing.org\r\n"); // Be polite and say who we are
    myClient.write("Host: 192.168.0.15\r\n"); // Be polite and say who we are
    myClient.write("User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.0.7) Gecko/2009021906 Firefox/3.0.7\r\n");
    myClient.write("Accept: text/html,application/xhtml+xml,application/xml\r\n");
    myClient.write("Accept-Language: en-us,en;q=0.5\r\n");
    myClient.write("Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\r\n");
    myClient.write("\r\n");
  }catch(Exception e){
    println(e.toString());
    println(e.getMessage());
  }
}

void draw(){
  String dataIn;
  try{
    if (myClient.available()>0) {
        dataIn = myClient.readString();
        println(dataIn);
    }
  }catch(Exception e){
    println(e.toString());
    println(e.getMessage());
  } 
}

In processingJS, I get the error "ReferenceError: Client is not defined".

In my search I cannot find anything, does anyone have an idea?

thx, Nard

Nard

Also investigated security settings in the processingJS sketch by using IPaddressString="localhost", but same message. Also tried chrome/firefox/ie with page containing sketch accessed as local file and via a webserver (mongoose) All options give the same error message.

GoToLoop

• Client is a class belonging to a Java library. Therefore it can't be used in JavaScript! [-X
• You're gonna need to find a JS library w/ similar capabilities I'm afraid! :-S

PhiLho

In JS, perhaps you can load the page in an iframe.

Nard

Thx.

Based on your answers I tried iframes, but I then encountered the problem of javascript security which prevents cross domain data exchange.

I now made a simple webbrowser in VB.Net which provided the functionality I need: The browser loads a webpage with the processing sketch. From within processing I call a javascript function on the webpage which signals VB.Net to load another webpage and return the info via javascript to processing. The guide from Pomax at processingjs.org provided a lot of insight! (But turned out to be quite easy.)