How to use

getAssertionConsumerServiceURL

method

in

org.opensaml.saml.saml2.core.AuthnRequest

private static AssertionConsumerService getAssertionConsumerServiceFromRequest(final RequestAbstractType authnRequest, final String binding) {
  if (authnRequest instanceof AuthnRequest) {
    val acsUrl = AuthnRequest.class.cast(authnRequest).getAssertionConsumerServiceURL();
    if (StringUtils.isBlank(acsUrl)) {
      return null;
    }
    LOGGER.debug("Using assertion consumer service url [{}] with binding [{}] from authentication request", acsUrl, binding);
    val builder = new AssertionConsumerServiceBuilder();
    val endpoint = builder.buildObject(AssertionConsumerService.DEFAULT_ELEMENT_NAME);
    endpoint.setBinding(binding);
    endpoint.setResponseLocation(acsUrl);
    endpoint.setLocation(acsUrl);
    return endpoint;
  }
  return null;
}

if (req.getAssertionConsumerServiceURL() != null) {
  domElement.setAttributeNS(null, AuthnRequest.ASSERTION_CONSUMER_SERVICE_URL_ATTRIB_NAME, req
      .getAssertionConsumerServiceURL());

public SAMLAuthnRequest(AuthnRequest authnRequest) {
  super(authnRequest);
  consumerServiceURL = authnRequest.getAssertionConsumerServiceURL();
  forceAuthn = authnRequest.isForceAuthn().booleanValue();
  if (authnRequest.getSubject() != null && authnRequest.getSubject().getNameID() != null) {
    subjectNameId = authnRequest.getSubject().getNameID().getValue();
  }
}

protected void verifyRequest(final AuthnRequest request, final SAML2MessageContext context) {
  // Verify endpoint requested in the original request
  final AssertionConsumerService assertionConsumerService = (AssertionConsumerService) context.getSAMLEndpointContext()
    .getEndpoint();
  if (request.getAssertionConsumerServiceIndex() != null) {
    if (!request.getAssertionConsumerServiceIndex().equals(assertionConsumerService.getIndex())) {
      logger.warn("Response was received at a different endpoint index than was requested");
    }
  } else {
    final String requestedResponseURL = request.getAssertionConsumerServiceURL();
    final String requestedBinding = request.getProtocolBinding();
    if (requestedResponseURL != null) {
      final String responseLocation;
      if (assertionConsumerService.getResponseLocation() != null) {
        responseLocation = assertionConsumerService.getResponseLocation();
      } else {
        responseLocation = assertionConsumerService.getLocation();
      }
      if (!requestedResponseURL.equals(responseLocation)) {
        logger.warn("Response was received at a different endpoint URL {} than was requested {}",
          responseLocation, requestedResponseURL);
      }
    }
    if (requestedBinding != null && !requestedBinding.equals(context.getSAMLBindingContext().getBindingUri())) {
      logger.warn("Response was received using a different binding {} than was requested {}",
        context.getSAMLBindingContext().getBindingUri(), requestedBinding);
    }
  }
}

log.debug("{} Populating template endpoint for resolution from SAML AuthnRequest", getLogPrefix());
endpoint.setLocation(((AuthnRequest) inboundMessage).getAssertionConsumerServiceURL());
endpoint.setBinding(((AuthnRequest) inboundMessage).getProtocolBinding());
if (endpoint instanceof IndexedEndpoint) {

} else {
  acs.setBinding(authnRequest.getProtocolBinding());
  acs.setLocation(authnRequest.getAssertionConsumerServiceURL());
  acs.setResponseLocation(authnRequest.getAssertionConsumerServiceURL());
  acs.setIndex(0);
  acs.setIsDefault(Boolean.TRUE);

.setAssertionConsumerService(
  getEndpoint(
    request.getAssertionConsumerServiceURL(),
    Binding.fromUrn(request.getProtocolBinding()),
    ofNullable(request.getAssertionConsumerServiceIndex()).orElse(-1),