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/*
* Juick
* Copyright (C) 2008-2011, Ugnich Anton
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.juick.server;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import rocks.xmpp.addr.Jid;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.nio.charset.StandardCharsets;
import java.time.Instant;
import java.util.UUID;
/**
*
* @author Ugnich Anton
*/
public abstract class Stream {
public boolean isLoggedIn() {
return loggedIn;
}
public void setLoggedIn(boolean loggedIn) {
this.loggedIn = loggedIn;
}
Jid from;
public Jid to;
private InputStream is;
private OutputStream os;
private XmlPullParserFactory factory;
protected XmlPullParser parser;
private OutputStreamWriter writer;
StreamHandler streamHandler;
private boolean loggedIn;
private Instant created;
private Instant updated;
String streamId;
private boolean secured;
public Stream(final Jid from, final Jid to, final InputStream is, final OutputStream os) throws XmlPullParserException {
this.from = from;
this.to = to;
this.is = is;
this.os = os;
factory = XmlPullParserFactory.newInstance();
created = updated = Instant.now();
streamId = UUID.randomUUID().toString();
}
void restartStream() throws XmlPullParserException {
parser = factory.newPullParser();
parser.setInput(new InputStreamReader(is, StandardCharsets.UTF_8));
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true);
writer = new OutputStreamWriter(os, StandardCharsets.UTF_8);
}
public void connect() {
try {
restartStream();
handshake();
parse();
} catch (XmlPullParserException e) {
StreamError invalidXmlError = new StreamError("invalid-xml");
send(invalidXmlError.toString());
connectionFailed(new Exception(invalidXmlError.getCondition()));
} catch (IOException e) {
connectionFailed(e);
}
}
public void setHandler(final StreamHandler streamHandler) {
this.streamHandler = streamHandler;
}
public abstract void handshake() throws XmlPullParserException, IOException;
public void logoff() {
setLoggedIn(false);
try {
writer.flush();
writer.close();
//TODO close parser
} catch (final Exception e) {
connectionFailed(e);
}
}
public void send(final String str) {
try {
updated = Instant.now();
writer.write(str);
writer.flush();
} catch (final Exception e) {
connectionFailed(e);
}
}
private void parse() throws IOException, XmlPullParserException {
while (parser.next() != XmlPullParser.END_DOCUMENT) {
if (parser.getEventType() == XmlPullParser.IGNORABLE_WHITESPACE) {
setUpdated();
}
if (parser.getEventType() != XmlPullParser.START_TAG) {
continue;
}
setUpdated();
final String tag = parser.getName();
switch (tag) {
case "message":
case "presence":
case "iq":
streamHandler.stanzaReceived(XmlUtils.parseToString(parser, false));
break;
case "error":
StreamError error = StreamError.parse(parser);
connectionFailed(new Exception(error.getCondition()));
return;
default:
XmlUtils.skip(parser);
break;
}
}
}
/**
* This method is used to be called on a parser or a connection error.
* It tries to close the XML-Reader and XML-Writer one last time.
*/
private void connectionFailed(final Exception ex) {
if (isLoggedIn()) {
try {
writer.close();
//TODO close parser
} catch (Exception e) {
}
}
streamHandler.fail(ex);
}
public Instant getCreated() {
return created;
}
public Instant getUpdated() {
return updated;
}
public String getStreamId() {
return streamId;
}
public boolean isSecured() {
return secured;
}
public void setSecured(boolean secured) {
this.secured = secured;
}
public void setUpdated() {
this.updated = Instant.now();
}
}
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