/*
* 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 java.io.IOException;
import java.io.InputStream;
import javax.servlet.http.HttpServletRequest;
import org.apache.mina.core.buffer.IoBuffer;
import org.apache.vysper.charset.CharsetUtil;
import org.apache.vysper.xml.sax.NonBlockingXMLReader;
import org.apache.vysper.xml.sax.impl.DefaultNonBlockingXMLReader;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* Decodes bytes into BOSH requests
* <p>
* Uses nbxml for XML processing.
* For every HTTP request there is a BoshDecoder instance
* to ensure that parsing errors (e.g. malformed XML) do not affect other requests.
*
* @author The Apache MINA Project (dev@mina.apache.org)
*/
public class BoshDecoder {
private final NonBlockingXMLReader reader;
private final HttpServletRequest request;
/**
* Creates a new decoder to parse an HTTP request
* @param boshHandler
* @param req
*/
public BoshDecoder(BoshHandler boshHandler, HttpServletRequest req) {
request = req;
reader = new DefaultNonBlockingXMLReader();
ContentHandler contentHandler = new BoshSaxContentHandler(boshHandler, req);
reader.setContentHandler(contentHandler);
}
/**
* Decodes the bytes from the {@link InputStream} provided by the current {@link HttpServletRequest} of
* the request context into a BOSH requests.
* @throws IOException
* @throws SAXException
*/
public void decode() throws IOException, SAXException {
IoBuffer ioBuf = IoBuffer.allocate(1024);
ioBuf.setAutoExpand(true);
byte[] buf = new byte[1024];
InputStream in = request.getInputStream();
for (;;) {
int i = in.read(buf);
if (i == -1) {
break;
}
ioBuf.put(buf, 0, i);
}
ioBuf.flip();
reader.parse(ioBuf, CharsetUtil.UTF8_DECODER);
}
}