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block-002-get-early-negotiation.js
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block-002-get-early-negotiation.js
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/*
Handle a blockwise response of an acceptable size to a confirmable GET request
with a Block2 option:
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
------------------------------------------------------------------------------
Uri-Path: blocks
Uri-Path: get
Block2 : NUM: 0, M: false, SZX: 2 (64 bytes)
==============================================================================
2. Server sends the first block:
==============================================================================
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
------------------------------------------------------------------------------
Content-Format: text/plain;charset=utf-8
Block2 : NUM: 0, M: true, SZX: 2 (64 bytes)
------------------------------------------------------------------------------
Payload (64 bytes)
|-------------------------------------------------------------|
==============================================================================
3. Client receives the #2 block. Request emits the `acknowledged` event and
the `block received` event.
4. Client sends a request for the second block:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 0 0 | 0 0 0 0 | 0 0 0 0 0 0 0 1 | 0x0002
1 | CON | 0 bytes | GET | 2
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Uri-Path: blocks
Uri-Path: get
Block2 : NUM: 1, M: false, SZX: 2 (64 bytes)
==============================================================================
5. Servers responds with the second block:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 1 0 | 0 0 0 0 | 0 1 0 0 0 1 0 1 | 0x0002
1 | ACK | 0 bytes | 2.05 Content | 2
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Content-Format: text/plain;charset=utf-8
Block2 : NUM: 1, M: true, SZX: 2 (64 bytes)
------------------------------------------------------------------------------
Payload (64 bytes)
| BLOCK 2 |
==============================================================================
6. Client receives the #5 block. Request emits the `block received` event.
7. Client sends a request for the third block:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 0 0 | 0 0 0 0 | 0 0 0 0 0 0 0 1 | 0x0003
1 | CON | 0 bytes | GET | 3
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Uri-Path: blocks
Uri-Path: get
Block2 : NUM: 2, M: false, SZX: 2 (64 bytes)
==============================================================================
8. Server responds with the third, last block:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 1 0 | 0 0 0 0 | 0 1 0 0 0 1 0 1 | 0x0003
1 | ACK | 0 bytes | 2.05 Content | 3
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Content-Format: text/plain;charset=utf-8
Block2 : NUM: 2, M: false, SZX: 2 (64 bytes)
------------------------------------------------------------------------------
Payload (63 bytes)
|-------------------------------------------------------------|
==============================================================================
9. Client receives the #8 block. Request emits the `block received` event.
10. Client recognizes that the #8 block was the last one, and so the request
emits the `response` event with a new, combined response message.
*/
'use strict';
require('should');
var sinon = require('sinon');
var helpers = require('../helpers');
var Message = require(helpers.LIB_DIR).Message;
helpers.test(__filename, function(ctx)
{
var expectedRequest = {
type: Message.Type.CON,
code: Message.Code.GET,
uri: '/blocks/get',
block2: {num: 0, m: false, size: 64}
};
var expectedResWithBlock0 = {
type: Message.Type.ACK,
code: Message.Code.CONTENT,
id: 0x0001,
block2: {num: 0, m: true, size: 64},
contentFormat: 'text/plain;charset=utf-8',
payload: new Buffer(
'|-------------------------------------------------------------|\n'
)
};
var expectedReqForBlock1 = {
type: Message.Type.CON,
code: Message.Code.GET,
id: 0x0002,
uri: '/blocks/get',
block2: {num: 1, m: false, size: 64}
};
var expectedResWithBlock1 = {
type: Message.Type.ACK,
code: Message.Code.CONTENT,
id: expectedReqForBlock1.id,
block2: {num: 1, m: true, size: 64},
contentFormat: 'text/plain;charset=utf-8',
payload: new Buffer(
'| BLOCK 1 |\n'
)
};
var expectedReqForBlock2 = {
type: Message.Type.CON,
code: Message.Code.GET,
id: 0x0003,
uri: '/blocks/get',
block2: {num: 2, m: false, size: 64}
};
var expectedResWithBlock2 = {
type: Message.Type.ACK,
code: Message.Code.CONTENT,
id: expectedReqForBlock2.id,
block2: {num: 2, m: false, size: 64},
contentFormat: 'text/plain;charset=utf-8',
payload: new Buffer(
'|-------------------------------------------------------------|'
)
};
var expectedResponse = {
type: expectedResWithBlock2.type,
code: expectedResWithBlock2.code,
id: expectedResWithBlock2.id,
block2: expectedResWithBlock2.block2,
contentFormat: 'text/plain;charset=utf-8',
payload: new Buffer(
'|-------------------------------------------------------------|\n' +
'| BLOCK 1 |\n' +
'|-------------------------------------------------------------|'
)
};
ctx.socket.expectRequest(expectedRequest);
ctx.socket.scheduleResponse(50, expectedResWithBlock0);
ctx.socket.expectRequest(50, expectedReqForBlock1);
ctx.socket.scheduleResponse(100, expectedResWithBlock1);
ctx.socket.expectRequest(100, expectedReqForBlock2);
ctx.socket.scheduleResponse(150, expectedResWithBlock2);
var req = ctx.client.request(
Message.fromObject({
code: Message.Code.GET,
uri: '/blocks/get'
}),
{blockSize: 64}
);
var eventSpy = sinon.spy(req, 'emit');
ctx.clock.tick(3600000);
return function assert()
{
ctx.socket.assert();
sinon.assert.callCount(eventSpy, 5);
sinon.assert.calledWith(
eventSpy, 'acknowledged', sinon.match.instanceOf(Message)
);
sinon.assert.calledWith(
eventSpy, 'block received', sinon.match.instanceOf(Message)
);
sinon.assert.calledWith(
eventSpy, 'response', sinon.match.instanceOf(Message)
);
eventSpy.args[0][0].should.be.equal('acknowledged');
sinon.assert.coapMessage(
eventSpy.args[0][1], expectedResWithBlock0, "Invalid ACK."
);
eventSpy.args[1][0].should.be.equal('block received');
sinon.assert.coapMessage(
eventSpy.args[1][1],
expectedResWithBlock0,
"Invalid `block received` (#1)."
);
eventSpy.args[2][0].should.be.equal('block received');
sinon.assert.coapMessage(
eventSpy.args[2][1],
expectedResWithBlock1,
"Invalid `block received` (#2)."
);
eventSpy.args[3][0].should.be.equal('block received');
sinon.assert.coapMessage(
eventSpy.args[3][1],
expectedResWithBlock2,
"Invalid `block received` (#3)."
);
eventSpy.args[4][0].should.be.equal('response');
sinon.assert.coapMessage(
eventSpy.args[4][1], expectedResponse, "Invalid `response`."
);
var lastBlockReceived = eventSpy.args[3][1];
var response = eventSpy.args[4][1];
response.should.not.be.equal(lastBlockReceived);
};
});