@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent me) throws Exception {
if (!(me.getMessage() instanceof HttpRequest)) {
ctx.sendUpstream(me);
return;
}
HttpRequest request = (HttpRequest) me.getMessage();
Object response;
// Look up resource
String path = request.getUri();
String host = request.getHeader("host");
log.debug("Received request for path:" + path);
boolean showHtml = false;
if (path.endsWith("?html")) {
showHtml = true;
path = path.replace("?html", "");
}
for (String service : resources.keySet()) {
log.debug("Available Service: " + service);
}
Model model = resources.get(path);
if (model != null) {
if (request.getMethod() == HttpMethod.GET) {
if (showHtml) {
String html = HtmlCreator.createModelPage(model, new URI(path), host);
response = ChannelBuffers.wrappedBuffer(html.getBytes(Charset.forName("UTF-8")));
log.debug("Returned html page for resource: " + path);
} else {
response = new SelfDescription(model, new URI(request.getUri()));
log.debug("Resource found: " + path);
}
} else {
response =
new DefaultHttpResponse(
request.getProtocolVersion(), HttpResponseStatus.METHOD_NOT_ALLOWED);
log.debug("Method not allowed: " + request.getMethod());
}
} else {
response =
HttpResponseFactory.createHttpResponse(
request.getProtocolVersion(), HttpResponseStatus.NOT_FOUND);
log.debug("Resource not found: " + path);
}
// Send response
ChannelFuture future = Channels.write(ctx.getChannel(), response);
future.addListener(ChannelFutureListener.CLOSE);
}
@Override
public void writeRequested(ChannelHandlerContext ctx, MessageEvent e) {
PaxosMessage msg;
ChannelBuffer sendBuf;
byte[] data;
msg = (PaxosMessage) e.getMessage(); // The original message.
// Serialize the message.
data = msg.serialize();
sendBuf = ChannelBuffers.buffer(data.length);
sendBuf.writeBytes(data); // Write the actual msg.
// Send the message upstream.
Channels.write(ctx, e.getFuture(), sendBuf);
}
private void writeReset(final InetSocketAddress remoteEndpoint, final int messageID) {
try {
CoapMessage resetMessage = CoapMessage.createEmptyReset(messageID);
ChannelFuture future = Channels.future(ctx.getChannel());
Channels.write(this.getChannelHandlerContext(), future, resetMessage, remoteEndpoint);
future.addListener(
new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
log.info("RST for message ID {} succesfully sent to {}.", messageID, remoteEndpoint);
}
});
} catch (IllegalArgumentException e) {
log.error("This should never happen.", e);
}
}
private void writeEmptyAcknowledgement(
final InetSocketAddress remoteAddress, final int messageID) {
try {
CoapMessage emptyAcknowledgement = CoapMessage.createEmptyAcknowledgement(messageID);
ChannelFuture future = Channels.future(ctx.getChannel());
Channels.write(ctx, future, emptyAcknowledgement, remoteAddress);
future.addListener(
new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
log.info(
"Empty ACK for message ID {} succesfully sent to {}.", messageID, remoteAddress);
}
});
} catch (IllegalArgumentException e) {
log.error("This should never happen.", e);
}
}
@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
if (!(e.getMessage() instanceof HttpRequest)) {
super.messageReceived(ctx, e);
}
HttpRequest request = (HttpRequest) e.getMessage();
URI uri = entityManager.normalizeURI(getEntityManager().getURIBase() + request.getUri());
String path = uri.getPath();
System.out.println("# received request: " + uri);
/*
* TODO:
* - if GET "$base/entities/create", return entity creation form
* - if GET "$base/entities/" || GET "$base/.well-known/servers" return entity list
* - if POST "$base/entities/", call createEntity($postdata)
*
* - if GET "$base/sources/", return sources list
* - if GET "$base/sources/edit" return sources edit form
* - if POST "$base/sources/", call setSources($postdata)
*/
if (uri.equals(entityManager.normalizeURI(pathPrefix + "/list-entities"))) {
if (request.getMethod() == HttpMethod.GET) {
StringBuffer sb = new StringBuffer();
sb.append("<html><head><title>SLSE List</title></head><body><h1>SLSE List</h1><ol>");
for (ServiceLevelSemanticEntity slse : this.slseCache.getAll()) {
sb.append("<li>");
sb.append(slse.getURI() + "<pre>" + slse.getDescribes() + "</pre>");
sb.append("</li>");
}
sb.append("</ol></body></html>");
Channels.write(ctx.getChannel(), Answer.create(sb.toString()));
}
} else if (uri.equals(entityManager.normalizeURI(pathPrefix + "/create-entity"))) {
if (request.getMethod() == HttpMethod.GET) {
// copy into
// HttpResponse response = new DefaultHttpResponse(request.getProtocolVersion(),
// HttpResponseStatus.OK);
// response.setContent(ChannelBuffers.wrappedBuffer(htmlContent));
Channels.write(ctx.getChannel(), Answer.create(new String(htmlContent)));
// Channels.write(ctx.getChannel(),
// Answer.create(new File("data/slse/ui/create_entity_form.html")));
} else if (request.getMethod() == HttpMethod.POST) {
QueryStringDecoder qsd =
new QueryStringDecoder(
"http://blub.blah/?" + request.getContent().toString(Charset.defaultCharset()));
String elementsQuery = "";
String name = "";
boolean dependsOnSensorValues = false;
boolean multiNodeQuery = false;
for (Map.Entry<String, List<String>> entry : qsd.getParameters().entrySet()) {
String key = entry.getKey();
for (String value : entry.getValue()) {
if (entry.getKey().equals("elementsQuery")) {
elementsQuery = value;
} else if (entry.getKey().equals("name")) {
name = value;
} else if (key.equals("dependsOnSensorValues") && value.equals("yes")) {
dependsOnSensorValues = true;
} else if (key.equals("multiNodeQuery") && value.equals("yes")) {
multiNodeQuery = true;
}
}
}
System.out.println(
"# adding rule: name="
+ name
+ " dependsOnSensorValues="
+ dependsOnSensorValues
+ " multiNodeQuery="
+ multiNodeQuery);
slseBuilder.addRule(name, elementsQuery, dependsOnSensorValues, multiNodeQuery);
Channels.write(
ctx.getChannel(),
Answer.create(
"<html><head><meta http-equiv=\"REFRESH\" content=\"0;url=/\"></head></html>"));
}
} else {
uri = entityManager.toThing(uri);
Model r = ModelFactory.createDefaultModel();
if (waitForPolling) {
// System.out.println("# waiting for esecache: " + uri);
synchronized (eseCache) {
while (!eseCache.isPollComplete()) {
try {
eseCache.wait(1000);
} catch (InterruptedException ex) {
ex
.printStackTrace(); // To change body of catch statement use File | Settings |
// File Templates.
}
}
}
}
// System.out.println("# waiting for slseCache: " + uri);
synchronized (slseCache) {
if (slseCache.get(uri.toString()) == null) {
System.out.println(
"! SLSE not found in cache: " + uri.toString() + " returning empty model");
} else {
r.add(slseCache.get(uri.toString()).getModel());
}
}
ChannelFuture future = Channels.write(ctx.getChannel(), r);
if (!HttpHeaders.isKeepAlive(request)) {
future.addListener(ChannelFutureListener.CLOSE);
}
// System.out.println("# done: " + uri);
}
}
