/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.vysper.xmpp.extension.xep0124;
import javax.servlet.http.HttpServletRequest;
import org.apache.vysper.mina.codec.StanzaBuilderFactory;
import org.apache.vysper.xml.decoder.XMPPContentHandler;
import org.apache.vysper.xml.fragment.AbstractXMLElementBuilder;
import org.apache.vysper.xml.fragment.Renderer;
import org.apache.vysper.xml.fragment.XMLElement;
import org.apache.vysper.xmpp.stanza.Stanza;
import org.apache.vysper.xmpp.stanza.StanzaBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
/**
* SAX handler that constructs BOSH requests by parsing the XML from BOSH clients.
* <p>
* This class is similar to {@link XMPPContentHandler}
*
* @author The Apache MINA Project (dev@mina.apache.org)
*/
public class BoshSaxContentHandler implements ContentHandler {
private static final Logger LOGGER = LoggerFactory.getLogger(BoshSaxContentHandler.class);
private final BoshHandler boshHandler;
private final HttpServletRequest request;
private final StanzaBuilderFactory builderFactory;
private AbstractXMLElementBuilder<StanzaBuilder, Stanza> builder;
private int depth = 0;
private boolean isBodyPayloadDecoded = false;
public BoshSaxContentHandler(BoshHandler boshHandler, HttpServletRequest req) {
this.boshHandler = boshHandler;
request = req;
builderFactory = new StanzaBuilderFactory();
}
public void characters(char[] ch, int start, int length) throws SAXException {
// TODO handle start and length
if (builder != null) {
builder.addText(new String(ch));
}
}
public void endElement(String uri, String localName, String qName) throws SAXException {
depth--;
if (depth == 0 && !isBodyPayloadDecoded) {
// complete body, emit
emitStanza();
} else {
builder.endInnerElement();
}
}
private void emitStanza() {
isBodyPayloadDecoded = true;
XMLElement element = builder.build();
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("BOSH decoding request: {}", new Renderer(element).getComplete());
}
boshHandler.process(request, (Stanza) element);
builder = null;
}
public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
depth++;
if (builder == null) {
builder = builderFactory.createBuilder(localName, uri, extractPrefix(qName), null, null);
} else {
builder.startInnerElement(localName, uri);
}
for (int i = 0; i < atts.getLength(); i++) {
builder.addAttribute(atts.getURI(i), atts.getLocalName(i), atts.getValue(i));
}
}
private String extractPrefix(String qname) {
int index = qname.indexOf(':');
if (index > -1) {
return qname.substring(0, index);
} else {
return "";
}
}
public void setDocumentLocator(Locator locator) {
// ignore
}
public void startDocument() throws SAXException {
// ignore
}
public void endDocument() throws SAXException {
// ignore
}
public void startPrefixMapping(String prefix, String uri) throws SAXException {
// ignore
}
public void endPrefixMapping(String prefix) throws SAXException {
// ignore
}
public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
// ignore
}
public void processingInstruction(String target, String data) throws SAXException {
// ignore
}
public void skippedEntity(String name) throws SAXException {
// ignore
}
}