On 24.09.2009, at 17:56, David Beasley wrote:
Can anyone help me with using the Axis-based Cocoon SOAP server?
I want to be able to deliver an XML-formatted report in response to
a SOAP request. I've written a pipeline that produces the report.
Cocoon will handle SOAP requests ok, but only as a Reader service
(not a Generator or Transformer). So, I'm trying to work out how I
integrate the SOAP request with the report-generating pipeline I've
written.
It seems to me that I need to write some java code, to be invvoked
by the SOAP request, and have this code itself invoke Cocoon to
generate the XML report - which the java code then includes in the
body of the SOAP response.
Is this the best way to do it? And if so, does anyone have any hints/
tips/sample code?
Or is there some other way to integrate the result of a Cocoon
pipeline with the response to a SOAP request, that doesnt involve
calling out to a java routine which then calls back into Cocoon?
I'm thinking that life might be easier if there were a separate SOAP
Generator and SOAP Serializer, and I could then plug my report-
generating pipeline into the middle. Or is it not as simple as that?
David Beasley
I can you provide some sample code for a SOAP transformer which
expects as input the SOAP request surrounded by a special element
which attributes specify the endpoint and the soapAction. The input is
replaced by the SOAP response of the server.
Sitemap:
<map:generate src="soapRequest.xml"/>
<map:transform type="soap"/>
<map:serialize type="xml"/>
Sample soapRequest.xml:
<soapTransformer:call endpointUri="http://www50.brinkster.com/vbfacileinpt/np.asmx
" soapAction="http://microsoft.com/webservices/GetPrimeNumbers";
xmlns:soapTransformer="http://cocoon.apache.org/transformation/soap/
1.0">
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/
">
<SOAP-ENV:Header/>
<SOAP-ENV:Body>
<GetPrimeNumbers
xmlns="http://microsoft.com/webservices/";>
<max>11</max>
</GetPrimeNumbers>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
</soapTransformer:call>
public class SoapTransformer extends AbstractSAXTransformer {
private SoapClient soapClient;
private String endpointUri;
private String soapAction;
public SoapTransformer() {
defaultNamespaceURI = "http://cocoon.apache.org/transformation/soap/1.0
";
}
@Override
public void startTransformingElement(String uri, String name, String
raw, Attributes attr) throws ProcessingException, IOException,
SAXException {
endpointUri = attr.getValue("endpointUri");
soapAction = attr.getValue("soapAction");
startSerializedXMLRecording(null);
}
@Override
public void endTransformingElement(String uri, String name, String
raw) throws ProcessingException, IOException, SAXException {
String soapRequest = endSerializedXMLRecording();
String soapResponse = getSoapClient().call(endpointUri, soapAction,
soapRequest);
toSax(soapResponse);
}
private void toSax(String soapResponse) throws SAXException,
IOException {
XMLReader xmlReader = XMLReaderFactory.createXMLReader();
xmlReader.setContentHandler(contentHandler);
xmlReader.parse(new InputSource(new
StringReader(soapResponse)));
}
public void setSoapClient(SoapClient soapClient) {
this.soapClient = soapClient;
}
public SoapClient getSoapClient() {
return soapClient;
}
}
public interface SoapClient {
public String call(String endpointUri, String soapAction, String
soapRequest);
}
public class SoapClientImpl implements SoapClient {
private static final String ENCODING = "utf-8";
@Override
public String call(String endpointUri, String soapAction, String
soapRequest) {
try {
HttpURLConnection httpConn =
createHttpConnection(endpointUri);
configureHttpHeaders(httpConn, soapAction, soapRequest);
OutputStream out = httpConn.getOutputStream();
out.write(soapRequest.getBytes(ENCODING));
out.close();
return IOUtils.toString(httpConn.getInputStream(),
ENCODING);
} catch (Exception e) {
throw new SoapException(String.format("SOAP call to %s failed:
soapAction='%s', soapRequest='%s'", endpointUri, soapAction,
soapRequest), e);
}
}
private void configureHttpHeaders(HttpURLConnection httpConn, String
soapAction, String soapRequest) throws UnsupportedEncodingException,
ProtocolException {
httpConn.setRequestProperty("Content-Length", String.valueOf
(soapRequest.getBytes(ENCODING).length));
httpConn.setRequestProperty("Content-Type", "text/xml; charset=" +
ENCODING);
httpConn.setRequestProperty("SOAPAction", soapAction);
httpConn.setRequestMethod("POST");
httpConn.setDoOutput(true);
httpConn.setDoInput(true);
}
private HttpURLConnection createHttpConnection(String endpointUri)
throws MalformedURLException, IOException {
URL url = new URL(endpointUri);
URLConnection connection = url.openConnection();
HttpURLConnection httpConn = (HttpURLConnection) connection;
return httpConn;
}
}
Alex
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