mirror of
https://github.com/vanitasvitae/Smack.git
synced 2024-11-01 01:35:59 +01:00
114 lines
3.5 KiB
Markdown
114 lines
3.5 KiB
Markdown
HTTP over XMPP transport
|
|
========================
|
|
|
|
[Back](index.md)
|
|
|
|
Allows the transport of 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 with 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, where entityID is a Jid
|
|
DiscoverInfo discoInfo = discoManager.discoverInfo(entityID);
|
|
// Check if room is HOXT is supported
|
|
boolean isSupported = 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 the limitation of XMPP message
|
|
size).
|
|
|
|
**Usage**
|
|
|
|
First you need to register a _**StanzaListener**_ 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 _**StanzaListener**_.
|
|
|
|
For the HTTP server you:
|
|
|
|
* You handle the _**HttpOverXmppReq**_ requests in your _**StanzaListener**_.
|
|
* And create and send _**HttpOverXmppResp**_ responses.
|
|
|
|
**Examples**
|
|
|
|
In this example we are an HTTP client, so we send a request (POST) and handle the
|
|
response:
|
|
|
|
```
|
|
// create a request body
|
|
String urlEncodedMessage = "I_love_you";
|
|
|
|
// prepare headers
|
|
List<Header> headers = new ArrayList<>();
|
|
headers.add(new Header("Host", "juliet.capulet.com"));
|
|
headers.add(new Header("Content-Type", "application/x-www-form-urlencoded"));
|
|
headers.add(new Header("Content-Length", Integer.toString(urlEncodedMessage.length())));
|
|
|
|
// 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);
|
|
|
|
// create request
|
|
HttpOverXmppReq req = HttpOverXmppReq.buider()
|
|
.setMethod(HttpMethod.POST)
|
|
.setResource("/mailbox")
|
|
.setHeaders(headers)
|
|
.setVersion("1.1")
|
|
.setData(data)
|
|
.build();
|
|
|
|
// add to, where jid is the Jid of the individual the packet is sent to
|
|
req.setTo(jid);
|
|
|
|
// send it
|
|
connection.sendIqWithResponseCallback(req, new StanzaListener() {
|
|
public void processStanza(Stanza iq) {
|
|
HttpOverXmppResp resp = (HttpOverXmppResp) iq;
|
|
// check HTTP response code
|
|
if (resp.getStatusCode() == 200) {
|
|
// get content of the response
|
|
NamedElement child = resp.getData().getChild();
|
|
// check which type of content of the response arrived
|
|
if (child instanceof AbstractHttpOverXmpp.Xml) {
|
|
// print the message and anxiously read if from the console ;)
|
|
System.out.println(((AbstractHttpOverXmpp.Xml) child).getText());
|
|
} else {
|
|
// process other AbstractHttpOverXmpp data child subtypes
|
|
}
|
|
}
|
|
}
|
|
});
|
|
```
|