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/*
 * Copyright (c) 1997, 2021 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package com.sun.xml.ws.addressing;

import com.sun.istack.NotNull;
import com.sun.istack.Nullable;
import com.sun.xml.ws.addressing.model.ActionNotSupportedException;
import com.sun.xml.ws.addressing.model.InvalidAddressingHeaderException;
import com.sun.xml.ws.api.EndpointAddress;
import com.sun.xml.ws.api.SOAPVersion;
import com.sun.xml.ws.api.WSBinding;
import com.sun.xml.ws.api.addressing.AddressingVersion;
import com.sun.xml.ws.api.addressing.NonAnonymousResponseProcessor;
import com.sun.xml.ws.api.addressing.WSEndpointReference;
import com.sun.xml.ws.api.message.AddressingUtils;
import com.sun.xml.ws.api.message.Message;
import com.sun.xml.ws.api.message.MessageHeaders;
import com.sun.xml.ws.api.message.Messages;
import com.sun.xml.ws.api.message.Packet;
import com.sun.xml.ws.api.model.wsdl.WSDLBoundOperation;
import com.sun.xml.ws.api.model.wsdl.WSDLPort;
import com.sun.xml.ws.api.pipe.*;
import com.sun.xml.ws.api.server.WSEndpoint;
import com.sun.xml.ws.client.Stub;
import com.sun.xml.ws.developer.JAXWSProperties;
import com.sun.xml.ws.message.FaultDetailHeader;
import com.sun.xml.ws.resources.AddressingMessages;

import javax.xml.soap.SOAPFault;
import javax.xml.ws.WebServiceException;
import java.net.URI;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Handles WS-Addressing for the server.
 *
 * @author Rama Pulavarthi
 * @author Kohsuke Kawaguchi
 * @author Arun Gupta
 */
public class WsaServerTube extends WsaTube {
    private WSEndpoint endpoint;
    // store the replyTo/faultTo of the message currently being processed.
    // both will be set to non-null in processRequest
    private WSEndpointReference replyTo;
    private WSEndpointReference faultTo;
    private boolean isAnonymousRequired = false;
    // Used by subclasses to avoid this class closing the transport back
    // channel based on the ReplyTo/FaultTo addrs being non-anonymous. False
    // can be useful in cases where special back-channel handling is required.
    protected boolean isEarlyBackchannelCloseAllowed = true;
    
    /**
     * WSDLBoundOperation calculated on the Request payload.
     * Used for determining ReplyTo or Fault Action for non-anonymous responses     * 
     */
    private WSDLBoundOperation wbo;
    public WsaServerTube(WSEndpoint endpoint, @NotNull WSDLPort wsdlPort, WSBinding binding, Tube next) {
        super(wsdlPort, binding, next);
        this.endpoint = endpoint;
    }

    public WsaServerTube(WsaServerTube that, TubeCloner cloner) {
        super(that, cloner);
        endpoint = that.endpoint;
    }

    @Override
    public WsaServerTube copy(TubeCloner cloner) {
        return new WsaServerTube(this, cloner);
    }

    @Override
    public @NotNull NextAction processRequest(Packet request) {
        Message msg = request.getMessage();
        if (msg == null) {
            return doInvoke(next,request);
        } // hmm?

        // expose bunch of addressing related properties for advanced applications 
        request.addSatellite(new WsaPropertyBag(addressingVersion,soapVersion,request));

        // Store request ReplyTo and FaultTo in requestPacket.invocationProperties
        // so that they can be used after responsePacket is received.
        // These properties are used if a fault is thrown from the subsequent Pipe/Tubes.

        MessageHeaders hl = request.getMessage().getHeaders();
        String msgId;
        try {
            replyTo = AddressingUtils.getReplyTo(hl, addressingVersion, soapVersion);
            faultTo = AddressingUtils.getFaultTo(hl, addressingVersion, soapVersion);
            msgId = AddressingUtils.getMessageID(hl, addressingVersion, soapVersion);
        } catch (InvalidAddressingHeaderException e) {

            LOGGER.log(Level.WARNING, addressingVersion.getInvalidMapText()+", Problem header:" + e.getProblemHeader()+ ", Reason: "+ e.getSubsubcode(),e);

            // problematic header must be removed since it can fail during Fault message processing
            hl.remove(e.getProblemHeader());

            SOAPFault soapFault = helper.createInvalidAddressingHeaderFault(e, addressingVersion);
            // WS-A fault processing for one-way methods
            if ((wsdlPort!=null) && request.getMessage().isOneWay(wsdlPort)) {
                Packet response = request.createServerResponse(null, wsdlPort, null, binding);
                return doReturnWith(response);
            }

            Message m = Messages.create(soapFault);
            if (soapVersion == SOAPVersion.SOAP_11) {
                FaultDetailHeader s11FaultDetailHeader = new FaultDetailHeader(addressingVersion, addressingVersion.problemHeaderQNameTag.getLocalPart(), e.getProblemHeader());
                m.getHeaders().add(s11FaultDetailHeader);
            }

            Packet response = request.createServerResponse(m, wsdlPort, null, binding);
            return doReturnWith(response);
        }

        // defaulting
        if (replyTo == null) {
            replyTo = addressingVersion.anonymousEpr;
        }
        if (faultTo == null) {
            faultTo = replyTo;
        }

        // Save a copy into the packet such that we can save it with that
        // packet if we're going to deliver the response at a later time
        // (async from the request).
        request.put(WsaPropertyBag.WSA_REPLYTO_FROM_REQUEST, replyTo);
        request.put(WsaPropertyBag.WSA_FAULTTO_FROM_REQUEST, faultTo);
        request.put(WsaPropertyBag.WSA_MSGID_FROM_REQUEST, msgId);

        wbo = getWSDLBoundOperation(request);
        isAnonymousRequired = isAnonymousRequired(wbo);

        Packet p = validateInboundHeaders(request);
        // if one-way message and WS-A header processing fault has occurred,
        // then do no further processing
        if (p.getMessage() == null) {
            return doReturnWith(p);
        }

        // if we find an error in addressing header, just turn around the direction here
        if (p.getMessage().isFault()) {
            // close the transportBackChannel if we know that
            // we'll never use them
            if (isEarlyBackchannelCloseAllowed &&
                !(isAnonymousRequired) &&
                    !faultTo.isAnonymous() && request.transportBackChannel != null) {
                request.transportBackChannel.close();
            }
            return processResponse(p);
        }
        // close the transportBackChannel if we know that
        // we'll never use them
        if (isEarlyBackchannelCloseAllowed &&
            !(isAnonymousRequired) &&
                !replyTo.isAnonymous() && !faultTo.isAnonymous() &&
                request.transportBackChannel != null) {
            request.transportBackChannel.close();
        }
        return doInvoke(next,p);
    }

    protected boolean isAnonymousRequired(@Nullable WSDLBoundOperation wbo) {
        //this requirement can only be specified in W3C case, Override this in W3C case.
        return false;
    }

    protected void checkAnonymousSemantics(WSDLBoundOperation wbo, WSEndpointReference replyTo, WSEndpointReference faultTo) {
        //this requirement can only be specified in W3C case, Override this in W3C case.
    }

    @Override
    public @NotNull NextAction processException(Throwable t) {
        final Packet response = Fiber.current().getPacket();
        ThrowableContainerPropertySet tc = response.getSatellite(ThrowableContainerPropertySet.class);
        if (tc == null) {
            tc = new ThrowableContainerPropertySet(t);
            response.addSatellite(tc);
        } else if (t != tc.getThrowable()) {
            // This is a pathological case where an exception happens after a previous exception.
            // Make sure you report the latest one.
            tc.setThrowable(t);
        }
        return processResponse(response.endpoint.createServiceResponseForException(tc, response, soapVersion, wsdlPort,
                                                                                   response.endpoint.getSEIModel(),
                                                                                   binding));
    }

    @Override
    public @NotNull NextAction processResponse(Packet response) {
        Message msg = response.getMessage();
        if (msg ==null) {
            return doReturnWith(response);
        }  // one way message. Nothing to see here. Move on.

        String to = AddressingUtils.getTo(msg.getHeaders(), 
                addressingVersion, soapVersion);
        if (to != null) {
        	replyTo = faultTo = new WSEndpointReference(to, addressingVersion);
        }
        
        if (replyTo == null) {
            // This is an async response or we're not processing the response in
            // the same tube instance as we processed the request. Get the ReplyTo
            // now, from the properties we stored into the request packet. We
            // assume anyone that interrupted the request->response flow will have
            // saved the ReplyTo and put it back into the packet for our use.
            replyTo = (WSEndpointReference)response.
                get(WsaPropertyBag.WSA_REPLYTO_FROM_REQUEST);
        }

        if (faultTo == null) {
            // This is an async response or we're not processing the response in
            // the same tube instance as we processed the request. Get the FaultTo
            // now, from the properties we stored into the request packet. We
            // assume anyone that interrupted the request->response flow will have
            // saved the FaultTo and put it back into the packet for our use.
            faultTo = (WSEndpointReference)response.
                get(WsaPropertyBag.WSA_FAULTTO_FROM_REQUEST);
        }

        WSEndpointReference target = msg.isFault() ? faultTo : replyTo;       
        if (target == null && response.proxy instanceof Stub) {
        	target = ((Stub) response.proxy).getWSEndpointReference();
        }
        if (target == null || target.isAnonymous() || isAnonymousRequired) {
            return doReturnWith(response);
        }
        if (target.isNone()) {
            // the caller doesn't want to hear about it, so proceed like one-way
            response.setMessage(null);
            return doReturnWith(response);
        }

        if ((wsdlPort!=null) && response.getMessage().isOneWay(wsdlPort)) {
            // one way message but with replyTo. I believe this is a hack for WS-TX - KK.
            LOGGER.fine(AddressingMessages.NON_ANONYMOUS_RESPONSE_ONEWAY());
            return doReturnWith(response);
        }

        // MTU: If we're not sending a response that corresponds to a WSDL op,
        //      then take whatever soapAction is set on the packet (as allowing
        //      helper.getOutputAction() will only result in a bogus 'unset'
        //      action value.
        if (wbo != null || response.soapAction == null) {
          String action = response.getMessage().isFault() ?
                  helper.getFaultAction(wbo, response) :
                  helper.getOutputAction(wbo);
          //set the SOAPAction, as its got to be same as wsa:Action
          if (response.soapAction == null ||
              (action != null &&
               !action.equals(AddressingVersion.UNSET_OUTPUT_ACTION))) {
        	  response.soapAction = action;
          }
        }
        response.expectReply = false;

        EndpointAddress adrs;
        try {
             adrs = new EndpointAddress(URI.create(target.getAddress()));
        } catch (NullPointerException e) {
            throw new WebServiceException(e);
        } catch (IllegalArgumentException e) {
            throw new WebServiceException(e);
        }

        response.endpointAddress = adrs;
        
        if (response.isAdapterDeliversNonAnonymousResponse) {
        	return doReturnWith(response);
        }
        
        return doReturnWith(NonAnonymousResponseProcessor.getDefault().process(response));
    }

    @Override
    protected void validateAction(Packet packet) {
        //There may not be a WSDL operation.  There may not even be a WSDL.
        //For instance this may be a RM CreateSequence message.
        WSDLBoundOperation wsdlBoundOperation = getWSDLBoundOperation(packet);

        if (wsdlBoundOperation == null) {
            return;
        }

        String gotA = AddressingUtils.getAction(
                packet.getMessage().getHeaders(),
                addressingVersion, soapVersion);

        if (gotA == null) {
            throw new WebServiceException(AddressingMessages.VALIDATION_SERVER_NULL_ACTION());
        }

        String expected = helper.getInputAction(packet);
        String soapAction = helper.getSOAPAction(packet);
        if (helper.isInputActionDefault(packet) && (soapAction != null && !soapAction.equals(""))) {
            expected = soapAction;
        }

        if (expected != null && !gotA.equals(expected)) {
            throw new ActionNotSupportedException(gotA);
        }
    }

    @Override
    protected void checkMessageAddressingProperties(Packet packet) {
        super.checkMessageAddressingProperties(packet);

        // wsaw:Anonymous validation
        WSDLBoundOperation wsdlBoundOperation = getWSDLBoundOperation(packet);
        checkAnonymousSemantics(wsdlBoundOperation, replyTo, faultTo);
         // check if addresses are valid
        checkNonAnonymousAddresses(replyTo,faultTo);
    }

    @SuppressWarnings("ResultOfObjectAllocationIgnored")
    private void checkNonAnonymousAddresses(WSEndpointReference replyTo, WSEndpointReference faultTo) {
        if (!replyTo.isAnonymous()) {
            try {
                new EndpointAddress(URI.create(replyTo.getAddress()));
            } catch (Exception e) {
                throw new InvalidAddressingHeaderException(addressingVersion.replyToTag, addressingVersion.invalidAddressTag);
            } 
        }
        //for now only validate ReplyTo
        /*
        if (!faultTo.isAnonymous()) {
            try {
                new EndpointAddress(URI.create(faultTo.getAddress()));
            } catch (IllegalArgumentException e) {
                throw new InvalidAddressingHeaderException(addressingVersion.faultToTag, addressingVersion.invalidAddressTag);
            }
        }
        */

    }
    
    /**
     * @deprecated
     *      Use {@link JAXWSProperties#ADDRESSING_MESSAGEID}.
     */
    public static final String REQUEST_MESSAGE_ID = "com.sun.xml.ws.addressing.request.messageID";

    private static final Logger LOGGER = Logger.getLogger(WsaServerTube.class.getName());
}




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