[3235] | 1 | /*
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| 2 | * SOAPCommunicator.java
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| 3 | * Copyright (C) 2002 New Zealand Digital Library, http://www.nzdl.org
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| 4 | *
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| 5 | * This program is free software; you can redistribute it and/or modify
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| 6 | * it under the terms of the GNU General Public License as published by
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| 7 | * the Free Software Foundation; either version 2 of the License, or
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| 8 | * (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program; if not, write to the Free Software
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| 17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 18 | */
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[3222] | 19 | package org.greenstone.gsdl3.comms;
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| 20 |
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| 21 | import org.greenstone.gsdl3.util.*;
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| 22 | import org.greenstone.gsdl3.core.*;
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| 23 |
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| 24 | // classes needed for SOAP stuff
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| 25 | import java.net.URL;
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| 26 | import java.net.MalformedURLException;
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| 27 | import java.util.Vector;
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[9874] | 28 | import org.apache.axis.client.Call;
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| 29 | import org.apache.axis.client.Service;
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| 30 | import org.apache.axis.message.SOAPBodyElement;
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| 31 | import javax.xml.namespace.QName;
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[3222] | 32 |
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| 33 | import org.w3c.dom.Node;
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| 34 | import org.w3c.dom.NodeList;
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| 35 | import org.w3c.dom.Document;
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| 36 | import org.w3c.dom.Element;
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| 37 |
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[3235] | 38 | /*
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| 39 | * The Client side of a SOAP Connection
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| 40 | *
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| 41 | * @author <a href="mailto:[email protected]">Katherine Don</a>
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| 42 | * @version $Revision: 11022 $
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| 43 | * @see <a href="http://www.w3.org/TR/SOAP/">Simple Object Access Protocol (SOAP) 1.1 </a>
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| 44 | */
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[3222] | 45 | public class SOAPCommunicator
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| 46 | extends Communicator {
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| 47 |
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[3505] | 48 | /** address of site to connect to */
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| 49 | protected String remote_site_address_=null;
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| 50 |
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[3222] | 51 | /** the call object that does the SOAP talking */
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| 52 | private Call call_ = null;
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[3235] | 53 |
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| 54 | /** The no-args constructor */
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[3222] | 55 | public SOAPCommunicator() {
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| 56 |
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| 57 | }
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[3505] | 58 |
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| 59 | public boolean configure(Element site_elem) {
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[9874] | 60 |
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[3512] | 61 | String type = site_elem.getAttribute(GSXML.TYPE_ATT);
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| 62 | if (!type.equals(GSXML.COMM_TYPE_SOAP_JAVA)) {
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[3505] | 63 | System.err.println("SOAPCommunicator: wrong type of site");
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| 64 | return false;
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| 65 | }
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[3512] | 66 | remote_site_name_ = site_elem.getAttribute(GSXML.NAME_ATT);
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[10290] | 67 | if (remote_site_name_.equals("")) {
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[3505] | 68 | System.err.println("SOAPCommunicator: must have name attribute in site element");
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| 69 | return false;
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| 70 | }
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[10290] | 71 | remote_site_address_ = site_elem.getAttribute(GSXML.ADDRESS_ATT);
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| 72 | String local_site_name = site_elem.getAttribute(GSXML.LOCAL_SITE_ATT);
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| 73 | if (remote_site_address_.equals("") && local_site_name.equals("")) {
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| 74 | System.err.println("SOAPCommunicator: must have address or localSite attributes in site element");
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[3505] | 75 | return false;
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| 76 | }
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[10290] | 77 | if (remote_site_address_.equals("")) {
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| 78 | remote_site_address_ = GlobalProperties.getGSDL3WebAddress()+"/services/"+local_site_name;
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| 79 | }
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| 80 |
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[9874] | 81 | try {
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| 82 | Service service = new Service();
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| 83 | call_ = (Call) service.createCall();
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| 84 | call_.setTargetEndpointAddress( new java.net.URL(remote_site_address_) );
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| 85 | } catch (Exception e) {
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| 86 | System.err.println("SOAPCommunicator.configure() Error: Exception occurred "+e);
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| 87 | return false;
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| 88 | }
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[3222] | 89 | return true;
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| 90 | }
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| 91 |
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[9874] | 92 | public Element process(Element message) {
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| 93 |
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| 94 | NodeList requests = message.getElementsByTagName(GSXML.REQUEST_ELEM);
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| 95 | if (requests.getLength()==0) {
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| 96 | // no requests
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| 97 | return null;
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| 98 | }
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[3222] | 99 |
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[9874] | 100 | // if the communicator is part of a site, it needs to edit the to and from fields, otherwise it just passes the message on, as is
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| 101 | // for now, use local_site_name_ as the flag.
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| 102 | if (local_site_name_!=null) { // no local site
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| 103 |
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| 104 | for (int i=0;i<requests.getLength(); i++) {
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| 105 | Element e = (Element)requests.item(i);
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| 106 | String to = e.getAttribute(GSXML.TO_ATT);
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| 107 | to = GSPath.removeFirstLink(to); // remove the server name, should check that it is present
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| 108 | e.setAttribute(GSXML.TO_ATT, to);
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| 109 | String from = e.getAttribute(GSXML.FROM_ATT);
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| 110 | from = GSPath.appendLink(from, local_site_name_);
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| 111 | e.setAttribute(GSXML.FROM_ATT, from);
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| 112 | }
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| 113 | }
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| 114 | // else do nothing to the requests, just pass it on
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| 115 |
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| 116 | // the soap impl needs a namespace for the top level element
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| 117 | Element message_to_send = message;
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| 118 | if (message.getNamespaceURI() == null) {
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| 119 | message_to_send = GSXML.duplicateWithNewNameNS(message.getOwnerDocument(), message, "gs3:"+message.getTagName(), "urn:foo", true);
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| 120 | //System.err.println("**"+new XMLConverter().getPrettyString(new_message));
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| 121 | }
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| 122 |
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| 123 | // do the soap query
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| 124 | Element result = null;
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| 125 | try {
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| 126 | SOAPBodyElement[] input = new SOAPBodyElement[1];
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| 127 | input[0] = new SOAPBodyElement(message_to_send);
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| 128 | Vector output = (Vector) call_.invoke( input );
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| 129 | SOAPBodyElement elem = (SOAPBodyElement) output.get(0);
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| 130 | result = elem.getAsDOM();
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| 131 | } catch (Exception e) {
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| 132 | e.printStackTrace();
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| 133 | return null;
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| 134 | }
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| 135 |
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| 136 | if (local_site_name_ != null) {// have to modify the from field
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| 137 |
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| 138 | NodeList responses = result.getElementsByTagName(GSXML.RESPONSE_ELEM);
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| 139 | for (int i=0;i<responses.getLength(); i++) {
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| 140 | Element e = (Element)responses.item(i);
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| 141 | String from = e.getAttribute(GSXML.FROM_ATT);
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| 142 | from = GSPath.prependLink(from, remote_site_name_);
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| 143 | e.setAttribute(GSXML.FROM_ATT, from);
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| 144 | }
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| 145 | } // else return as is
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| 146 |
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| 147 | return result;
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| 148 | }
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| 149 |
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| 150 | public static void main (String [] args) {
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| 151 | SOAPCommunicator comm = new SOAPCommunicator();
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| 152 | XMLConverter converter = new XMLConverter();
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| 153 | String message = "<site name=\"localsite\" address=\"http://kanuka.cs.waikato.ac.nz:7070/axis/services/localsite\" type=\"soap\"/>";
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| 154 | Element site_elem = converter.getDOM(message).getDocumentElement();
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| 155 | comm.configure(site_elem);
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| 156 | message = "<message><request type=\"describe\" to=\"\" lang=\"en\"/></message>";
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| 157 | Element request_elem = converter.getDOM(message).getDocumentElement();
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| 158 | Element response = comm.process(request_elem);
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| 159 |
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| 160 | System.err.println("response was "+converter.getPrettyString(response));
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| 161 | }
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[3222] | 162 | }
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| 163 |
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| 164 |
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| 165 |
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| 170 |
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