Zend Framework 2 SOAP server WSDL failed to load - soap

Question

I can't get the SOAP server working in Zend Framework 2 module. I am not completely sure, but I believe that the problem is the WSDL file. I try to create the WSDL file via Autodiscover, which is provided by the Zend Framework. Here is the error.log:
[Fri Apr 19 20:39:29 2013] [error] [client 172.23.31.109] PHP Warning: SoapServer::SoapServer(): I/O warning : failed to load external entity "http-LINK/services?wsdl" in /PATH/public_html/vendor/zendframework/zendframework/library/Zend/Soap/Server.php on line 749
[Fri Apr 19 20:39:29 2013] [error] [client 172.23.31.109] PHP Fatal error: SOAP-ERROR: Parsing WSDL: Couldn't load from 'http-LINK/services?wsdl' : failed to load external entity "http-LINK/services?wsdl"\n in /PATH/public_html/vendor/zendframework/zendframework/library/Zend/Soap/Server.php on line 749
I added an own module for this services test, this is the structure, module is called "Services":
-Services
--config
---module.config.php
--src
---Services
----API
-----1.0
------servicesAPI.php
---Controller
----ServicesController.php
--view
---services
----serivces
-Module.php
-autoload_classmap.php
This is my file "servicesAPI.php"
class servicesAPI {
/**
* This method takes a value and gives back the md5 hash of the value
*
* #param String $value
* #return String
*/
public function md5Value($value) {
return md5($value);
}
}
And this is ServicesController.php:
namespace Services\Controller;
ini_set("soap.wsdl_cache_enabled", 0);
use Zend\Mvc\Controller\AbstractActionController;
use Zend\Soap\AutoDiscover;
use Zend\Soap\Server;
require_once __DIR__ . '/../API/1.0/servicesAPI.php';
class ServicesController extends AbstractActionController {
private $_options;
private $_URI = "http-LINK/services";
private $_WSDL_URI = "http-LINK/services?wsdl";
public function indexAction() {
if (isset($_GET['wsdl'])) {
$this->handleWSDL();
} else {
$this->handleSOAP();
}
}
private function handleWSDL() {
$autodiscover = new AutoDiscover();
$autodiscover->setClass('servicesAPI')
->setUri($this->_URI);
$autodiscover->handle();
}
private function handleSOAP() {
$soap = new Server($this->_WSDL_URI);
$soap->setClass('servicesAPI');
$soap->handle();
}
}
So when I deploy this and open http-LINK/services in the browser, it gives me the following:
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Body>
<SOAP-ENV:Fault>
<faultcode>WSDL</faultcode>
<faultstring>
SOAP-ERROR: Parsing WSDL: Couldn't load from 'http-LINK/services?wsdl' : failed to load external entity "http-LINK/services?wsdl"
</faultstring>
<detail/>
</SOAP-ENV:Fault>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
On this call also the PHP error output is written!
If I try to open the services?wsdl in browser, it shows me this (chrome and safari):
This page contains the following errors:
error on line 3 at column 1: Extra content at the end of the document
Below is a rendering of the page up to the first error.
This method takes a value and gives back the md5 hash of the value
But if I inspect the element, it looks completely ok:
<?xml version="1.0" encoding="utf-8"?>
<definitions xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:tns="http-LINK/services" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap-enc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" name="servicesAPI" targetNamespace="http-LINK/services"><types><xsd:schema targetNamespace="http-LINK/services"/></types><portType name="servicesAPIPort"><operation name="md5Value"><documentation>This method takes a value and gives back the md5 hash of the value</documentation><input message="tns:md5ValueIn"/><output message="tns:md5ValueOut"/></operation></portType><binding name="servicesAPIBinding" type="tns:servicesAPIPort"><soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/><operation name="md5Value"><soap:operation soapAction="http-LINK/services#md5Value"/><input><soap:body use="encoded" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http-LINK/services"/></input><output><soap:body use="encoded" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http-LINK/services"/></output></operation></binding><service name="servicesAPIService"><port name="servicesAPIPort" binding="tns:servicesAPIBinding"><soap:address location="http-LINK/services"/></port></service><message name="md5ValueIn"><part name="value" type="xsd:string"/></message><message name="md5ValueOut"><part name="return" type="xsd:string"/></message></definitions>
I can validate this xml with any xml validator, it seems to be valid.
I read all the posts concerning this on stackoverflow, searched google, but none of the solutions helped me. Here a short list of what else I tried:
According to this: https://bugs.php.net/bug.php?id=48216 I tried to save the wsdl xml to a file and open it from this file when starting the soap server, fail
I tried to run the autodiscover and soapserver statements with try/catch to catch any exceptions, nothing appears
I tried with echo-ing through toXML() and other outputs, fail
Used XMLReader::open and isValid to make sure, that the xml is valid (it is)
Some more information:
PHP Version 5.3.23
Ubuntu server 11.04
php-soap module is loaded
Zend Framework version 2.1.4
Any help or hints are appreciated. Thanks in advance.

Answer 1

Try instantiate the Soap Server class this way:
...
private function handleSOAP() {
$soap = new Server(
null, array(,
'wsdl' => http-LINK/services?wsdl,
)
);
$soap->setClass('servicesAPI');
$soap->handle();
}
....
Also you should add this line to the end of your indexAction()
return $this->getResponse();
.. it disables the layout.