Java PHP posting using URLConnector, PHP file doesn't seem to receive parameters

Posted by Emdiesse on Stack Overflow See other posts from Stack Overflow or by Emdiesse
Published on 2010-04-03T14:00:04Z Indexed on 2010/04/03 14:03 UTC
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Hi there, I am trying to post some simple string data to my php script via a java application. My PHP script works fine when I enter the data myself using a web browser (newvector.php?x1=&y1=...)

However using my java application the php file does not seem to pick up these parameters, in fact I don't even know if they are sending at all because if I comment out on of the parameters in the java code when I am writing to dta it doesn't actually return, you must enter 6 parameters.

newvector.php

if(!isset($_GET['x1']) || !isset($_GET['y1']) || !isset($_GET['t1']) || !isset($_GET['x2']) || !isset($_GET['y2']) || !isset($_GET['t2'])){
    die("You must include 6 parameters within the URL: x1, y1, t1, x2, y2, t2");
}

$x1 = $_GET['x1'];
$x2 = $_GET['x2'];
$y1 = $_GET['y1'];
$y2 = $_GET['y2'];
$t1 = $_GET['t1'];
$t2 = $_GET['t2'];

$insert = "
    INSERT INTO vectors(
        x1,
        x2,
        y1,
        y2,
        t1,
        t2
    )
        VALUES (
        '$x1',
        '$x2',
        '$y1',
        '$y2',
        '$t1',
        '$t2'
    )
";

if(!mysql_query($insert, $conn)){
    die('Error: ' . mysql_error());
}

echo "Submitted Data x1=".$x1." y1=".$y1." t1=".$t1." x2=".$x2." y2=".$y2." t2=".$t2;

include 'db_disconnect.php';
?>

The java code

else if (action.equals("Play")) {
            for (int i = 0; i < 5; i++) { // data.size()
                String x1, y1, t1, x2, y2, t2 = "";
                String date = "2010-04-03 ";
                String ms = ".0";
                x1 = data.elementAt(i)[1];
                y1 = data.elementAt(i)[0];
                t1 = date + data.elementAt(i)[2] + ms;
                x2 = data.elementAt(i)[4];
                y2 = data.elementAt(i)[3];
                t2 = date + data.elementAt(i)[5] + ms;

                try {
                    //Create Post String
                    String dta = URLEncoder.encode("x1", "UTF-8") + "=" + URLEncoder.encode(x1, "UTF-8");
                    dta += "&" + URLEncoder.encode("y1", "UTF-8") + "=" + URLEncoder.encode(y1, "UTF-8");
                    dta += "&" + URLEncoder.encode("t1", "UTF-8") + "=" + URLEncoder.encode(t1, "UTF-8");
                    dta += "&" + URLEncoder.encode("x2", "UTF-8") + "=" + URLEncoder.encode(x2, "UTF-8");
                    dta += "&" + URLEncoder.encode("y2", "UTF-8") + "=" + URLEncoder.encode(y2, "UTF-8");
                    dta += "&" + URLEncoder.encode("t2", "UTF-8") + "=" + URLEncoder.encode(t2, "UTF-8");

                    System.out.println(dta);

                    // Send Data To Page
                    URL url = new URL("http://localhost/newvector.php");
                    URLConnection conn = url.openConnection();
                    conn.setDoOutput(true);
                    OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
                    wr.write(dta);
                    wr.flush();

                    // Get The Response
                    BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                    String line;
                    while ((line = rd.readLine()) != null) {
                        System.out.println(line);
                        //you Can Break The String Down Here
                    }
                    wr.close();
                    rd.close();
                } catch (Exception exc) {
                    System.out.println("Hmmm!!! " + exc.getMessage());
                }
            }

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