How to deal with “Request denied by Throttle server” SOAP responses in Laravel 5

Question

I have made a web application that uses SOAP exchanges to get data from a Web API. This was initially done in a procedural way and I'm now trying to move it into a Laravel framework. I have a view set up to display to the user if the SOAP Response is "Request denied by Throttle server" but I don't know how to check for that particular error. Here is the Class:

<?php namespace App\Models;

use SoapClient;
use Illuminate\Http\RedirectResponse;

class SoapWrapper {

public function soapExchange() {

    // set WSDL for authentication and create new SOAP client
    $auth_url  = "http://search.webofknowledge.com/esti/wokmws/ws/WOKMWSAuthenticate?wsdl";

    // set WSDL for search and create new SOAP client
    $search_url = "http://search.webofknowledge.com/esti/wokmws/ws/WokSearch?wsdl";

    // array options are temporary and used to track request & response data
    $auth_client = @new SoapClient($auth_url);

    // array options are temporary and used to track request & response data
    $search_client = @new SoapClient($search_url);

    // run 'authenticate' method and store as variable
    $auth_response = $auth_client->authenticate();

    // call 'setCookie' method on '$search_client' storing SID (Session ID) as the response (value) given from the 'authenticate' method
    // check if an SID has been set, if not it means Throttle server has stopped the query, therefore display error message
    if (isset($auth_response->return)) {
        $search_client->__setCookie('SID',$auth_response->return);
    } else {
        return Redirect::route('throttle');
    }
}
}

The problem is that it throws the "Request denied by Throttle server" default Laravel error at $auth_response = $auth_client->authenticate(); before it gets to the if statement that checks if a value (SessionID) has been returned by the SOAP Request. It didn't do this when it was set up in a procedural way for some reason.

The if statement checks if a value has been returned from the authenticate() method and if it has, assigns it (SessionID) to the cookie of the search client to authorise searches. Otherwise it displays a custom error message.

I have tried using is_soap_fault but that doesn't catch it because it isn't technically a soap fault. I've also tried removing the line causing the problem and changing the if statement to:

if (isset($auth_client->authenticate()->return) {...

But that just causes the default Laravel SoapFault page too. The return Redirect::route('throttle') displays a custom error page to the user, saved as throttle.blade.php .

Anyone know how I can test for the throttle error?

Answer 1

Never mind, found answer here: Catching an exception when creating a new SoapClient properly .

I'll post my amended code anyway just in case it's of any use to anyone else in future:

<?php namespace App\Models;

use SoapClient;
use Illuminate\Http\RedirectResponse;

class SoapWrapper {

public function soapExchange() {

    try {
        // set WSDL for authentication and create new SOAP client
        $auth_url = "http://search.webofknowledge.com/esti/wokmws/ws/WOKMWSAuthenticate?wsdl";

        // set WSDL for search and create new SOAP client
        $search_url = "http://search.webofknowledge.com/esti/wokmws/ws/WokSearch?wsdl";

        // array options are temporary and used to track request & response data
        $auth_client = @new SoapClient($auth_url);

        // array options are temporary and used to track request & response data
        $search_client = @new SoapClient($search_url);

        // run 'authenticate' method and store as variable
        $auth_response = $auth_client->authenticate();

        // add SID (SessionID) returned from authenticate() to cookie of search client
        $search_client->__setCookie('SID', $auth_response->return);

    } catch (\SoapFault $e) {
        return Redirect::route('throttle');
    }
}
}