XMLRPC showing -32601 error (using PHP) - php

Question

I have the following code...
<?php
include("lib/xmlrpc.inc");
$email='whatever#hotmail.com';
$c=new xmlrpc_client("/register/index.php", "ws.myserver.com", 80);
$f=new xmlrpcmsg('existsEmail', array(new xmlrpcval($email, "base64")));
print "<pre>" . htmlentities($f->serialize( )) . "</pre>";
$r=$c->send($f);
$v=$r->value( );
if (!$r->faultCode( )) {
print "Email is". $email . " is " .
$v->scalarval( ) . "<br />";
print "<hr />I got this value back<br /><pre>" .
htmlentities($r->serialize( )). "</pre><hr />\n";
} else {
print "Fault: ";
print "Code: " . $r->faultCode( ) .
" Reason '" .$r->faultString( )."'<br />";
}
?>
I need to consume the WebService located at http://ws.myserver.com/register/index.php.
I pass the email as a parameter and then the XMLRPC.inc library will encode it using base64.
I've got a good XML request shown below:
<?xml version="1.0"?>
<methodCall>
<methodName>existsEmail</methodName>
<params>
<param>
<value><base64>dnJvZHJpZ3VlekBpY2NrLm5ldC5jbw==</base64></value>
</param>
</params>
</methodCall>
BUUUT, when I tried to get a response from the server I've to the following error
Fault: Code: -32601 Reason 'server error. requested method not found'
Any ideas? I'm getting crazy about how to call the existsEmail method from my PHP code...I'm sure it is there but I don't know if I'm missing something..

Answer 1

You are getting an error message (Specification for Fault Code Interoperability, version 20010516) from the XMLRPC endpoint you're communicating with.
It is a defined error code:
-32601 ---> server error. requested method not found
The RPC method you requested was not found by the server. Contact the support of the service you consume to get a list of all available methods. If that method should be available, contact the support and discuss the issue with them.
You asked in comment:
Is there any way [to] verify which methods are available?
That depends on the service. XMLRPC on sourceforge has a suggestion of defined methods you can call to list information about the functions available:
XML-RPC Introspection
system.listMethods
system.methodSignature
system.methodHelp
You can try if it works with your service, too. AFAIK those are common, I wrapped up a quick example, you find the full code below. See the output below the code as well.
$path = 'http://xmlrpc-c.sourceforge.net/api/sample.php';
printf("\n XMLRPC Service Discovery\n\n for: '%s'\n\n", $path);
$discovery = new Discovery($path);
$methods = $discovery->getMethods();
printf(" Method Summary:\n ===============\n", count($methods));
foreach ($methods as $i => $method)
{
printf(" %'.-2d %s\n", $i + 1, $method->getName());
}
printf("\n Method Details (%d):\n ===================\n", count($methods));
foreach ($methods as $i => $method)
{
printf(" %'.-2d %s\n", $i + 1, $method->getName());
printf("\n %s\n", $method);
printf("\n%s\n\n", preg_replace('/^/um', ' ', wordwrap($method->getHelp(), 46)));
}
Output:
XMLRPC Service Discovery
for: 'http://xmlrpc-c.sourceforge.net/api/sample.php'
Method Summary:
===============
1. debug.authInfo
2. sample.add
3. sample.sumAndDifference
4. system.listMethods
5. system.methodHelp
6. system.methodSignature
Method Details (6):
===================
1. debug.authInfo
<struct> debug.authInfo
Report any HTTP authentication in use
2. sample.add
<int> sample.add (<int>, <int>)
Add two numbers
3. sample.sumAndDifference
<struct> sample.sumAndDifference (<int>, <int>)
Add and subtract two numbers
4. system.listMethods
<array> system.listMethods (<string>)
This method lists all the methods that the
XML-RPC server knows how to dispatch
5. system.methodHelp
<string> system.methodHelp (<string>)
Returns help text if defined for the method
passed, otherwise returns an empty string
6. system.methodSignature
<array> system.methodSignature (<string>)
Returns an array of known signatures (an array
of arrays) for the method name passed. If no
signatures are known, returns a none-array
(test for type != array to detect missing
signature)
You can find the sourcecode here: XMLRPC Discovery Service