RE: [cobalt-users] Paypal and IPN on RAQ

[BSmith@xxxxxxxxxxx]

-----Original Message-----
From: Revd Leonard Payne [mailto:vicarage@xxxxxxxxxxxxxx]
Subject: [cobalt-users] Paypal and IPN on RAQ

Hi there

Has anyone had problems in getting Paypal IPN (Instant Purchase
Notification) working on a Raq?

regards

Leonard

_____________________________________


It must be your programming skills.  Use the example from their site.
It works perfectly.  Here you go, here it is:
This sends it:

<form action="https://www.paypal.com/cgi-bin/webscr"; method="post">
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="business" value="brian@xxxxxxxxxx">
<input type="hidden" name="item_name" value="IPN Test">
<input type="hidden" name="amount" value="0.01">
<input type="hidden" name="return"
value="http://www.nuonce.net/test/print.php";>
<input type="hidden" name="notify_url"
value="http://www.nuonce.net/test/print.php";>
<input type="image" src="http://images.paypal.com/images/x-click-butcc.gif";
name="submit">
</form>

The return can be a thank you page.  I just put them as 1 page.  You can
setup the
notify page as like a mini daemon, so it just updates a db, or whatever you
want.
You can also return a "custom" field.  READ READ READ.  It is rather easy!!

This receives it: (PHP)

<?php 
# i used this to see what paypal sends to me:
foreach ($_POST as $key => $value) {
    echo "Key: $key; Value: $value<br>\n";
}

// read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-validate';

foreach ($HTTP_POST_VARS as $key => $value) {
  $value = urlencode(stripslashes($value));
  $req .= "&$key=$value";
}

// post back to PayPal system to validate
$header .= "POST /cgi-bin/webscr HTTP/1.0\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= 'Content-Length: ' . strlen($req) . "\r\n\r\n";
$fp = fsockopen ('www.paypal.com', 80, $errno, $errstr, 30);

// assign posted variables to local variables
// note: additional IPN variables also available -- see 
// IPN documentation
$item_name = $HTTP_POST_VARS['item_name'];
$receiver_email = $HTTP_POST_VARS['receiver_email'];
$item_number = $HTTP_POST_VARS['item_number'];
$invoice = $HTTP_POST_VARS['invoice'];
$payment_status = $HTTP_POST_VARS['payment_status'];
$payment_gross = $HTTP_POST_VARS['payment_gross'];
$txn_id = $HTTP_POST_VARS['txn_id'];
$payer_email = $HTTP_POST_VARS['payer_email'];

if (!$fp) {
  // ERROR
  echo "$errstr ($errno)";
} else {
  fputs ($fp, $header . $req);
  while (!feof($fp)) {
    $res = fgets ($fp, 1024);
    if (strcmp ($res, "VERIFIED") == 0) {
      // check the payment_status is Completed
      // check that txn_id has not been previously processed
      // check that receiver_email is an email address in your PayPal
account
      // process payment
        print "received";
      }
      else if (strcmp ($res, "INVALID") == 0) {
      // log for manual investigation
      }
  }
  fclose ($fp);
}
?>