open socket between java app and Php

Question

I'm using socket to send data from PHP page to Java desktop application to process it and return processed data. The problem is i can't use the data that received from Php page in POINT X (see java code).. i meant between reading and writing ! even if i want to just print it:

String line = "";
            while ((line = br.readLine()) != null){
                   System.out.println(line);
            }

This is the code..

In JAVA:

boolean stayRunning=true;
    while(stayRunning){
        try{
            Socket s = new Socket("localhost",1235);
            BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));


            POINT X


            BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
            bw.write("Hello Java\n");
            bw.flush();

            String line = "";
            while ((line = br.readLine()) != null){
                   System.out.println(line);
            }



            bw.close();
            br.close();
            s.close();   
        }
        catch(Exception e)
        {
            //System.out.println("Java Error: " + e.getMessage());
        }
    }

In Php:

try {
$host = "localhost";
$port = 1235;

$socket = socket_create(AF_INET, SOCK_STREAM, 0) or die("Could not create socket\n");
$result = socket_bind($socket, $host, $port) or die("Could not bind to socket\n");
$result = socket_listen($socket, SOMAXCONN) or die("Could not set up socket listener\n");
$spawn = socket_accept($socket) or die("Could not accept incoming connection\n");
$input = socket_read($spawn, 10000, PHP_NORMAL_READ) or die("Could not read input\n");
echo $input;

$output = $_POST["txtbox"]."+|+".$_POST["se"];
socket_write($spawn,$output."\n", strlen($output) + 1) or die("Could not write output\n");

socket_close($spawn);
socket_close($socket);
}
catch(Exception $e) {
 echo 'Message: ' .$e->getMessage();
 }

score 0 · Answer 1 · answered Nov 13 '15 at 10:05

When the socket is open, the buffered reading is busy and couldn't used ! This problem called Blocking..

you can solve it by using Multi-threading in your application.

The Java Code:

public class PhpJavaConnection extends Thread {
    static BufferedReader br = null;
    static BufferedWriter bw = null;
    static Socket s = null;

public void run(){
                    String line = "";
                    try {
                        while ((line = br.readLine()) != null){
                            System.out.println(line); 
                        }       
                    } catch (IOException ex) {
                        //Logger.getLogger(PhpJavaConnection.class.getName()).log(Level.SEVERE, null, ex);
                    }
                }

public static void main(String[] args) {

    boolean stayRunning=true;


    System.out.println("Reading..");
    while(stayRunning){
        try{
            s = new Socket("localhost",1235);
            br = new BufferedReader(new InputStreamReader(s.getInputStream()));


            PhpJavaConnection my = new PhpJavaConnection();
            my.start();



            bw = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
            bw.write("Hello Java \n");
            bw.flush();


        }
        catch(Exception e)
        {
            //System.out.println("Java Error: " + e.getMessage());
        }
    }

    try {
        bw.close();
        br.close();
            s.close();
    } catch (IOException ex) {
        Logger.getLogger(PhpJavaConnection.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }



}

}

open socket between java app and Php

1 Answers1