Re: [fw-webservices] Problem with Zend_XmlRpc_Client

-- swilhelm <steve@studio831.com> wrote
(on Wednesday, 04 February 2009, 09:25 AM -0800):
> There were two specific things I wanted to do I found difficult with
> Zend_REST and Zend_XmlRPpc:
>
> I wanted to secure the set method by having clients pass authentication
> credientials with each call or have a login call that returned a session id
> and have subsequent calls pass id. Acl would be perfect for this, but didn't
> see any easy way to use it with either REST or XmlRpc.

This is actually easy to do by extending the Zend_XmlRpc_Request object.
What you can do in these cases is check to see if the method is for
"logging in", and if not, strip the first or last parameter from the
passed parameters and check it against the authentication session. As an
example:

class My_XmlRpc_Request extends Zend_XmlRpc_Request_Http
{
public function __construct()
{
parent::__construct();

if ($this->getMethod() != 'login') {
$params = $this->getParams();
$token = array_shift($params);
$this->setParams($params);

// Verify the token, and then add it to the registry...
Zend_Registry::set('token', $token);
}
}
}

Notice that I grab the parameters, remove an element, and then re-set
them without that element -- that's the only magic that needs to happen.
How you do the authentication or ACLs after that is up to you.

Then, in the endpoint script where the XML-RPC server is created, also
instantiate this class and add it to the server:

$request = new My_XmlRpc_Request();
$server->setRequest($request);

> One set call where the body of the POST was an existing XML format dictated
> by an existing client. In the wee hours of the morning, couldn't figure out
> how to get REST or Xml Rpc to accept a XML post body from a client.

Again, what you want to do here is to extend Zend_XmlRpc_Request (or the
_Http variant); in ZF's XML-RPC implementation, that's where we do the
parsing of the request into the requisite method and parameters. If the
response also needs to be in a specific format, extend
Zend_XmlRpc_Response (or the _Http variant), and override the saveXML()
method to build the appropriate response payload. Just like with the
request, you need to add the response object to the server prior to
handling the request.

These techniques work for all the server variants, by the way -- you can
do the same with the REST or JSON servers.

> Finally, had some Action control helpers for handling MySQL access and
> Logging that I just found easier to access using standard Controller
> behavior.
>
> If you have an example of REST or XmlRpc client and server that has
> authenticated set call with a large JSON or XML data parameter from client,
> I should would appreciate seeing it.
>
> Thanks in advance.
>
> - Steve W.
>
>
> Matthew Weier O'Phinney-3 wrote:
> >
> > -- swilhelm <steve@studio831.com> wrote
> > (on Saturday, 31 January 2009, 10:37 PM -0800):
> >> I just spent several frustrating hours trying to set up a Web service
> >> using
> >> first Zend_REST_Server and then Zend_XmlRpc_Server. Both turned out to be
> >> to
> >> limiting.
> >
> > Could you explain what you found limiting in the XML-RPC implementation?
> > I'd be curious to what your issues may have been, and what improvements
> > we might be able to make.
> >
> >> Eventually, I took Matthew O'Phinney's advice from
> >> http://www.nabble.com/Our-REST-implementation-td10834932s16154.html this
> >> discussion and used the standard MVC mechanisms and had the views
> >> returned
> >> well formatted XML data (I do eventually intend to leverage ContextSwitch
> >> capability).
> >>
> >> - Steve W.
> >>
> >>
> >> anz_nabble wrote:
> >> >
> >> > Can anyone explain how to develop a simple webservice using xml rpc.
> >> > I had done many searches and didn't find a useful one. I need to know
> >> > which files are placed in which locations
> >> >
> >> > Any good tutorial?
> >
> > --
> > Matthew Weier O'Phinney
> > Software Architect | matthew@zend.com
> > Zend Framework | http://framework.zend.com/
> >
> >
>
> --
> View this message in context: http://www.nabble.com/Problem-with-Zend_XmlRpc_Client-tp21598685p21835239.html
> Sent from the Zend Web Services mailing list archive at Nabble.com.
>

--
Matthew Weier O'Phinney
Software Architect | matthew@zend.com
Zend Framework | http://framework.zend.com/