Java tutorial
/******************************************************************************* * DISCLAIMER: The sample code or utility or tool described herein * is provided on an "as is" basis, without warranty of any kind. * UIDAI does not warrant or guarantee the individual success * developers may have in implementing the sample code on their * environment. * * UIDAI does not warrant, guarantee or make any representations * of any kind with respect to the sample code and does not make * any representations or warranties regarding the use, results * of use, accuracy, timeliness or completeness of any data or * information relating to the sample code. UIDAI disclaims all * warranties, express or implied, and in particular, disclaims * all warranties of merchantability, fitness for a particular * purpose, and warranties related to the code, or any service * or software related thereto. * * UIDAI is not responsible for and shall not be liable directly * or indirectly for any direct, indirect damages or costs of any * type arising out of use or any action taken by you or others * related to the sample code. * * THIS IS NOT A SUPPORTED SOFTWARE. ******************************************************************************/ package in.gov.uidai.auth.aua.httpclient; import java.io.StringReader; import java.io.StringWriter; import java.net.InetAddress; import java.net.URI; import javax.xml.bind.JAXBContext; import javax.xml.bind.JAXBElement; import javax.xml.bind.JAXBException; import javax.xml.bind.Unmarshaller; import javax.xml.namespace.QName; import javax.xml.transform.sax.SAXSource; import org.apache.commons.lang.StringUtils; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import org.xml.sax.XMLReader; import org.xml.sax.helpers.XMLReaderFactory; import com.sun.jersey.api.client.Client; import com.sun.jersey.api.client.WebResource; import in.gov.uidai.auth.aua.helper.DigitalSigner; import in.gov.uidai.auth.device.model.BfdResponseDetails; import in.gov.uidai.authentication.uid_auth_response._1.AuthRes; import in.gov.uidai.authentication.uid_bfd_request._1.Bfd; import in.gov.uidai.authentication.uid_bfd_response._1.BfdRes; /** * <code>AuthClient</code> class can be used for submitting an Authentication request to * UIDAI Auth Server, and to get the response back. Given an <code>Auth</code> object, this * class (@see {@link BfdClient#authenticate}) will convert it to XML string, then, * digitally sign it, and submit it to UIDAI Auth Server using HTTP POST message. After, * receiving the resonse, this class converts the response XML into authentication response * @see AuthRes object * * * @author UIDAI * */ public class BfdClient { private URI bfdServerURI = null; private String asaLicenseKey; private DigitalSigner digitalSignator; public BfdClient(URI bfdServerURI) { this.bfdServerURI = bfdServerURI; } public BfdResponseDetails performBfd(Bfd bfd) { try { String signedXML = generateSignedBfdXML(bfd); System.out.println(signedXML); String uriString = bfdServerURI.toString() + (bfdServerURI.toString().endsWith("/") ? "" : "/") + bfd.getAc() + "/" + bfd.getUid().charAt(0) + "/" + bfd.getUid().charAt(1); if (StringUtils.isNotBlank(asaLicenseKey)) { uriString = uriString + "/" + asaLicenseKey; } URI authServiceURI = new URI(uriString); WebResource webResource = Client.create(HttpClientHelper.getClientConfig(bfdServerURI.getScheme())) .resource(authServiceURI); String responseXML = webResource.header("REMOTE_ADDR", InetAddress.getLocalHost().getHostAddress()) .post(String.class, signedXML); System.out.println(responseXML); return new BfdResponseDetails(responseXML, parseBfdResponseXML(responseXML)); } catch (Exception e) { e.printStackTrace(); throw new RuntimeException("Exception during authentication " + e.getMessage(), e); } } private String generateSignedBfdXML(Bfd bfd) throws JAXBException, Exception { StringWriter bfdXML = new StringWriter(); JAXBElement<Bfd> bfdElement = new JAXBElement<Bfd>( new QName("http://www.uidai.gov.in/authentication/uid-bfd-request/1.0", "Bfd"), Bfd.class, bfd); JAXBContext.newInstance(Bfd.class).createMarshaller().marshal(bfdElement, bfdXML); boolean includeKeyInfo = true; if (System.getenv().get("SKIP_DIGITAL_SIGNATURE") != null) { return bfdXML.toString(); } else { return this.digitalSignator.signXML(bfdXML.toString(), includeKeyInfo); } } private BfdRes parseBfdResponseXML(String xmlToParse) throws JAXBException { //Create an XMLReader to use with our filter try { //Prepare JAXB objects JAXBContext jc = JAXBContext.newInstance(BfdRes.class); Unmarshaller u = jc.createUnmarshaller(); XMLReader reader; reader = XMLReaderFactory.createXMLReader(); //Create the filter (to add namespace) and set the xmlReader as its parent. NamespaceFilter inFilter = new NamespaceFilter( "http://www.uidai.gov.in/authentication/uid-bfd-response/1.0", true); inFilter.setParent(reader); //Prepare the input, in this case a java.io.File (output) InputSource is = new InputSource(new StringReader(xmlToParse)); //Create a SAXSource specifying the filter SAXSource source = new SAXSource(inFilter, is); //Do unmarshalling BfdRes res = u.unmarshal(source, BfdRes.class).getValue(); return res; } catch (SAXException e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } /** * Method to inject an instance of <code>DigitalSigner</code> class. * @param digitalSignator */ public void setDigitalSignator(DigitalSigner digitalSignator) { this.digitalSignator = digitalSignator; } public void setAsaLicenseKey(String asaLicenseKey) { this.asaLicenseKey = asaLicenseKey; } }