Processing Network HTTP Request Help

Processing Libraries
1

Hello!
I have been creating a program in Processing Java to get the HTML of a site with HTTP GET in the Networking Library. I followed the instructions in the Processing Network Tutorial, but it only shows how to get the HTML for one site, www.ucla.edu.
I initially started this topic because I got a 400 Bad request code, but now I realize the documentation of the network library is not great, and I don’t have a clue how to redirect to a different site.
The tutorial says I should use

Client c;
c = new Client(this, "www.ucla.edu", 80);  // Connect to server on port 80 
c.write("GET / HTTP/1.0\n");  // Use the HTTP "GET" command to ask for a webpage
c.write("Host: www.ucla.edu\n\n"); // Tell the server for which domain you are making the request

but I can’t use this to connect to other sites or pages.
Does anyone know the way to connect to other sites?
Thanks and sorry this is really badly worded…

2

Try examples here:

:slight_smile:

3

Please share your attempts and your efforts.

I have found a couple of post from previous posts:

Below is an example using HTTP GET / and using loadString(). The value of OUTPUT_LEN defines the amount of data to output in the console.

Kf

//REFERENCES: Text only websites   https://sjmulder.nl/en/textonly.html

//===========================================================================
// IMPORTS:
import http.requests.*;

//===========================================================================
// FINAL FIELDS:
final int OUTPUT_LEN=150;
final String[] urls = {
  "http://www.example.com/", 
  "http://www.google.com/", 
  "http://lite.cnn.io/en/"
};


//===========================================================================
// PROCESSING DEFAULT FUNCTIONS:

void settings() {
  size(400, 600);
}

void setup() {

  textAlign(CENTER, CENTER);
  rectMode(CENTER);

  fill(255);
  strokeWeight(2); 

  for (String url : urls) {
    getRequest(url);
    getData(url);
    delay(2000);   //NOT really needed but always be a good citizen
  }
  exit();
}

void draw(){}

//===========================================================================
// OTHER FUNCTIONS:

void getRequest(String url) {
  GetRequest get = new GetRequest(url); 
  get.send();
  String ret=get.getContent();
  println("====================GET /===========================");
  println("URL: ", url, "returned", ret.length(), "bytes (?)");
  println("Response Content:", ret.substring(0, OUTPUT_LEN), "...");
}

void getData(String url) {
  String[] str = loadStrings(url);  
  String ret=join(str, '\n');
  println("====================LOADSTRING===========================");
  println("URL: ", url, "returned", ret.length(), "bytes (?)");
  println("Response Content:", ret.substring(0, OUTPUT_LEN), "...");
}
1 Like
4

OK, thanks!! I’ll try that.