Allows to transport HTTP communication over XMPP peer-to-peer networks.
Description
Before using this extension you must ensure that your counterpart supports it also.
Usage
Once you have your ServiceDiscoveryManager you will be able to discover information associated with an XMPP entity. To discover the information of a given XMPP entity send discoverInfo(entityID) to your ServiceDiscoveryManager where entityID is the ID of the entity. The message discoverInfo(entityID) will answer an instance of DiscoverInfo that contains the discovered information.
Examples
In this example we can see how to check if the counterpart supports HOXT:
// Obtain the ServiceDiscoveryManager associated with my XMPPConnection ServiceDiscoveryManager discoManager = ServiceDiscoveryManager.getInstanceFor(connection); // Get the information of a given XMPP entity DiscoverInfo discoInfo = discoManager.discoverInfo("juliet@capulet.com"); // Check if room is HOXT is supported discoInfo.containsFeature("urn:xmpp:http");
Description
You can use IQ's to perform HTTP requests and responses. This is applicable to relatively short requests and responses (due to limitation of XMPP message size).
Usage
First you need to register a PacketListener to be able to handle intended IQs.
For the HTTP client you:
In this example we are HTTP client, so we send request (POST) and handle the response:
// register listener for IQ packets connection.addPacketListener(new IqPacketListener(), new PacketTypeFilter(IQ.class)); // create a request body String urlEncodedMessage = "I_love_you"; // create request HttpOverXmppReq.Req req = new HttpOverXmppReq.Req(HttpMethod.POST, "/mailbox"); req.setVersion("1.1"); // prepare headers Set<Header> set = new HashSet<Header>(); set.add(new Header("Host", "juliet.capulet.com")); set.add(new Header("Content-Type", "application/x-www-form-urlencoded")); set.add(new Header("Content-Length", Integer.toString(urlEncodedMessage.length()))); req.setHeaders(new HeadersExtension(set)); // provide body or request (not mandatory, - empty body is used for GET) AbstractHttpOverXmpp.Text child = new AbstractHttpOverXmpp.Text(urlEncodedMessage); AbstractHttpOverXmpp.Data data = new AbstractHttpOverXmpp.Data(child); req.setData(data); // create IQ packet HttpOverXmppReq packet = new HttpOverXmppReq(); packet.setReq(req); packet.setTo("juliet@capulet.com/balcony"); packet.setType(IQ.Type.SET); packet.setPacketID("42"); // send it connection.sendPacket(packet); // then in your PacketListener private class IqPacketListener implements PacketListener { @Override public void processPacket(Packet packet) { IQ iq = (IQ) packet; // verify from and packed ID if (iq.getFrom().equals("juliet@capulet.com/balcony") && (iq.getPacketID().equals("42"))) { // ensure it's not ERROR if (iq.getType().equals(IQ.Type.RESULT)) { // check if correct IQ implementation arrived if (iq instanceof HttpOverXmppResp) { HttpOverXmppResp resp = (HttpOverXmppResp) iq; // check HTTP response code if (resp.getResp().getStatusCode() == 200) { // get content of the response AbstractHttpOverXmpp.DataChild child = resp.getResp().getData().getChild(); // check which type of content of the response arrived if (child instanceof AbstractHttpOverXmpp.Xml) { // print the message and anxiously read if from console ;) System.out.println(((AbstractHttpOverXmpp.Xml) child).getText()); } else { // process other AbstractHttpOverXmpp.DataChild subtypes } } } } } } }