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+--- Thread: Using XML-RPC class to respond to non-XML requests (/showthread.php?tid=22822)
Using XML-RPC class to respond to non-XML requests - El Forum - 09-21-2009
[eluser]oribani[/eluser]
Hi,
I was looking for a painless way to send XML back to a client who sent a simple/classic POST request (non-XML). Unfortunately, if you want to use the XML-RPC classes, it looks like you are locked into needing to have a XML request from the client in order to build and send a XML response. While a good alternative would be to use the JSON model, I have easy JavaScript that can quickly parse what I need from a simple XML response, so I dug into the XML-RPC class and pulled the code I needed to make one into a helper function that I wanted to share below. If there's a supported way to do this, I'd like to hear about it.
Code:
/**
*
* Build and sends a XML response to client
*
* @param array $response Pre-built CI xmlrpc response array
*
* @return DOES NOT RETURN
*
*/
if (!function_exists('build_and_send_xml_response'))
{
function build_and_send_xml_response($response)
{
$CI =& get_instance();
$CI->load->library('xmlrpc');
$response_result = $CI->xmlrpc->send_response($response);
$payload = '<?xml version="1.0" encoding="UTF-8"?'.'>'."\n"
. $response_result->prepare_response();
header("Content-Type: text/xml");
header("Content-Length: ".strlen($payload));
// anti-cache headers
//
header('Last-Modified: Thu, 22 Jul 1999 10:00:00 GMT');
header('Expires: ' . gmdate('D, j M Y H:i:s') . ' GMT');
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: post-check=0, pre-check=0', FALSE);
header('Pragma: no-cache');
echo $payload;
exit;
}
}That "Pre-built CI xmlrpc response array" argument is easily created per the user guide documentation, but since its syntax is easy to trip over, I also abstracted it into an easy helper function (just note that it creates a structure that is specific to what my application does and my JavaScript that parses it):
Code:
/**
*
* Sends our own XML response to client
*
* @param mixed $response_code Response code,
* usually 2xx or 5xx
* @param mixed $response_message Response message,
* usually "OK", "ERROR",
* or "FATAL"
* @param mixed $payload Whatever data that should
* be sent back to the client
*
* @return DOES NOT RETURN
*
*/
if (!function_exists('send_xml_response'))
{
function send_xml_response($response_code, $response_message, $payload)
{
return build_and_send_xml_response(
array(
array(
'response_code' => $response_code,
'response_message' => $response_message,
'payload' => $payload,
),
'struct'
)
);
}
}So this way, my controller can validate POST data normally (with the form validator class) and send back a response in XML with a simple call to send_xml_response(...);