mirror of
https://github.com/vanitasvitae/Smack.git
synced 2024-12-29 05:57:58 +01:00
137 lines
4 KiB
Markdown
137 lines
4 KiB
Markdown
HTTP over XMPP transport
|
|
========================
|
|
|
|
Allows to transport HTTP communication over XMPP peer-to-peer networks.
|
|
|
|
* Discover HOXT support
|
|
* IQ exchange
|
|
|
|
|
|
Discover HOXT support
|
|
---------------------
|
|
|
|
**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");
|
|
```
|
|
IQ exchange
|
|
-----------
|
|
|
|
**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:
|
|
|
|
* You create and send _**HttpOverXmppReq**_ request.
|
|
* Then you handle the _**HttpOverXmppResp**_ response in your _**PacketListener**_.
|
|
For the HTTP server you:
|
|
|
|
* You handle the _**HttpOverXmppReq**_ requests in your _**PacketListener**_.
|
|
* And create and send _**HttpOverXmppResp**_ responses.
|
|
|
|
**Examples**
|
|
|
|
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
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
```
|