Is there a way to use Client.readString() propperly outside of the draw() function?

Core Library Questions

jameswlf

Is there a way to use Client.readString() propperly outside of the draw() function?

in Core Library Questions • 23 days ago

Hi. Can you help me?

Currently I have the following code, and everything is fine with it, except that I'd like to read the incoming data without recurring to the draw function. Specially since I don't need a draw function in the program I'm writing. While loop doesn't seem to work...

import processing.net.*;

String data;
Client c;
String hostvar;
String getReq;

void setup() {

hostvar = "www.processing.org";
getReq = "/reference";

c = new Client(this, hostvar, 80); // Connect to server on port 80

//c.write("GET / HTTP/1.1\r\n"); // Use the HTTP "GET" command to ask for a Web page

c.write("GET "+ getReq + " HTTP/1.1\r\n");
c.write("Host:" + hostvar + "\r\n");
c.write("User-Agent: Opera/9.80 (Windows NT 6.1; WOW64) Presto/2.12.388 Version/12.12; en-US; rv:1.9.0.7) Gecko/2009021906 Firefox/3.0.7\n");
c.write("\r\n");

while (c.available() > 0) { // This code doesn't work. .
data = c.readString(); // // This code doesn't work. .
println(data); // This code doesn't work. .
}// This code doesn't work. .
}

void draw() {

if (c.available() > 0) { // If there's incoming data from the client...
data = c.readString(); // ...then grab it and print it //this code works...
println(data);
}
}

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For if reason has once undoubted right on its side, it will not allow itself to be confined to set limits, by vague recommendations of moderation. -Immanuel Kant

Replies(1)

PhiLho

Re: Is there a way to use Client.readString() propperly outside of the draw() function?

22 days ago

The setup() method is executed at once. You send a request and immediately try to get the answer, but it will take a while before the server answers, so the response isn't available right now.
That's why Client example put the code in draw(), because it can scan regularly if there is a response.
Just add noLoop() after you get the response, and you have the best of both worlds. Alternatively, you can spawn a new thread to poll the response, but you will just do the same work than draw()...

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