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observe-011-reregistration-success.js
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observe-011-reregistration-success.js
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/*
Handle a re-registration of an observer after Max-Age ends:
1. Client sends a request:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 0 0 | 0 0 0 0 | 0 0 0 0 0 0 0 1 | 0x0001
1 | CON | 0 bytes | GET | 1
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Observe : 0
Uri-Path: observer
Uri-Path: expire
==============================================================================
2. Server adds the #1 request as an observer and sends a piggy-backed response:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 1 0 | 0 0 0 0 | 0 1 0 0 0 1 0 1 | 0x0001
1 | ACK | 0 bytes | 2.05 Content | 1
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Observe : 1
Content-Format: text/plain;charset=utf-8
Max-Age : 5
------------------------------------------------------------------------------
Payload (1 byte)
1
==============================================================================
3. Client receives the #2 response. The #1 request emits the `acknowledged`
event and the `response` event.
4. After 2s, server sends the first notification:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 0 0 | 0 0 0 0 | 0 1 0 0 0 1 0 1 | 0x4321
1 | CON | 0 bytes | 2.05 Content | 17185
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Observe : 2
Content-Format: text/plain;charset=utf-8
Max-Age : 5
------------------------------------------------------------------------------
Payload (1 byte)
2
==============================================================================
5. Client receives the #4 notification and sends an acknowledgement:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 1 0 | 0 0 0 0 | 0 0 0 0 0 0 0 0 | 0x4321
1 | ACK | 0 bytes | Empty | 17185
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
==============================================================================
6. The #1 request emits the `response` event.
7. After Max-Age ends (5s), client emits the `exchange timeout` event and
the #1 request emits the `timeout` event.
8. Client resends the #1 request with an updated message ID and token
(a new exchange is created):
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 0 0 | 0 0 0 1 | 0 0 0 0 0 0 0 1 | 0x0002
1 | CON | 1 byte | GET | 2
------------------------------------------------------------------------------
Token | Remote Endpoint
01 | 127.0.0.1
------------------------------------------------------------------------------
Observe : 0
Uri-Path: observer
Uri-Path: expire
==============================================================================
9. Server replaces the #1 observer with the #8 one and sends a piggy-backed
response:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 1 0 | 0 0 0 1 | 0 1 0 0 0 1 0 1 | 0x0002
1 | ACK | 1 byte | 2.05 Content | 2
------------------------------------------------------------------------------
Token | Remote Endpoint
01 | 127.0.0.1
------------------------------------------------------------------------------
Observe : 2
Content-Format: text/plain;charset=utf-8
Max-Age : 5
------------------------------------------------------------------------------
Payload (1 byte)
2
==============================================================================
10. Client receives the #9 response. The #8 request emits the `acknowledged`
event and the `response` event.
11. After 2s, server sends another notification:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 0 0 | 0 0 0 1 | 0 1 0 0 0 1 0 1 | 0x4322
1 | CON | 1 byte | 2.05 Content | 17186
------------------------------------------------------------------------------
Token | Remote Endpoint
01 | 127.0.0.1
------------------------------------------------------------------------------
Observe : 3
Content-Format: text/plain;charset=utf-8
Max-Age : 5
------------------------------------------------------------------------------
Payload (1 byte)
3
==============================================================================
12. Client receives the #11 notification and sends an acknowledgement:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 1 0 | 0 0 0 0 | 0 0 0 0 0 0 0 0 | 0x4322
1 | ACK | 0 bytes | Empty | 17186
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
==============================================================================
13. Client cancels the #8 observer, which in turn emits the `cancelled` event.
*/
'use strict';
require('should');
var sinon = require('sinon');
var helpers = require('../helpers');
var Message = require(helpers.LIB_DIR).Message;
helpers.test(__filename, function(ctx)
{
/*jshint maxstatements:999*/
var expectedRequest1 = {
type: Message.Type.CON,
code: Message.Code.GET,
id: 0x0001,
token: new Buffer([]),
uri: '/observer/expire',
observe: 0
};
var expectedResponse1 = {
type: Message.Type.ACK,
code: Message.Code.CONTENT,
id: expectedRequest1.id,
token: expectedRequest1.token,
contentFormat: 'text/plain;charset=utf-8',
maxAge: 5,
observe: 1,
payload: new Buffer('1')
};
var expectedNotification1 = {
type: Message.Type.CON,
code: Message.Code.CONTENT,
id: 0x4321,
token: expectedRequest1.token,
contentFormat: 'text/plain;charset=utf-8',
maxAge: 5,
observe: 2,
payload: new Buffer('2')
};
var expectedNotificationAck1 = {
type: Message.Type.ACK,
code: Message.Type.EMPTY,
id: expectedNotification1.id
};
var expectedRequest2 = {
type: Message.Type.CON,
code: Message.Code.GET,
id: 0x0002,
token: new Buffer([0x01]),
uri: '/observer/expire',
observe: 0
};
var expectedResponse2 = {
type: Message.Type.ACK,
code: Message.Code.CONTENT,
id: expectedRequest2.id,
token: expectedRequest2.token,
contentFormat: 'text/plain;charset=utf-8',
maxAge: 5,
observe: 2,
payload: new Buffer('2')
};
var expectedNotification2 = {
type: Message.Type.CON,
code: Message.Code.CONTENT,
id: 0x4322,
token: expectedRequest2.token,
contentFormat: 'text/plain;charset=utf-8',
maxAge: 5,
observe: 3,
payload: new Buffer('3')
};
var expectedNotificationAck2 = {
type: Message.Type.ACK,
code: Message.Type.EMPTY,
id: expectedNotification2.id
};
ctx.socket.expectRequest(expectedRequest1);
ctx.socket.scheduleResponse(50, expectedResponse1);
ctx.socket.scheduleResponse(2050, expectedNotification1);
ctx.socket.expectRequest(2050, expectedNotificationAck1);
ctx.socket.expectRequest(7050, expectedRequest2);
ctx.socket.scheduleResponse(7100, expectedResponse2);
ctx.socket.scheduleResponse(9100, expectedNotification2);
ctx.socket.expectRequest(9100, expectedNotificationAck2);
var req = ctx.client.request(Message.fromObject(expectedRequest1));
setTimeout(function() { ctx.client.cancel(req); }, 10000);
var eventSpy = sinon.spy(req, 'emit');
ctx.clock.tick(3600000);
return function assert()
{
ctx.socket.assert();
sinon.assert.callCount(eventSpy, 8);
sinon.assert.calledWith(
eventSpy, 'acknowledged', sinon.match.instanceOf(Message)
);
sinon.assert.calledWith(
eventSpy, 'response', sinon.match.instanceOf(Message)
);
sinon.assert.calledWith(
eventSpy, 'cancelled'
);
eventSpy.args[0][0].should.be.equal('acknowledged');
sinon.assert.coapMessage(
eventSpy.args[0][1], expectedResponse1, "Invalid ACK #1."
);
eventSpy.args[1][0].should.be.equal('response');
sinon.assert.coapMessage(
eventSpy.args[1][1], expectedResponse1, "Invalid `response` #1."
);
eventSpy.args[2][0].should.be.equal('response');
sinon.assert.coapMessage(
eventSpy.args[2][1], expectedNotification1, "Invalid notification #1."
);
eventSpy.args[3][0].should.be.equal('timeout');
eventSpy.args[4][0].should.be.equal('acknowledged');
sinon.assert.coapMessage(
eventSpy.args[4][1], expectedResponse2, "Invalid ACK #2."
);
eventSpy.args[5][0].should.be.equal('response');
sinon.assert.coapMessage(
eventSpy.args[5][1], expectedResponse2, "Invalid `response` #2."
);
eventSpy.args[6][0].should.be.equal('response');
sinon.assert.coapMessage(
eventSpy.args[6][1], expectedNotification2, "Invalid notification #2."
);
eventSpy.args[7][0].should.be.equal('cancelled');
};
});