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block-012-get-invalid-size.js
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block-012-get-invalid-size.js
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/*
Handle a blockwise response with an invalid block size (bigger than the one
specified in the request) to a confirmable GET request:
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
Uri-Path: invalid-size
==============================================================================
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: 3 (128 bytes)
------------------------------------------------------------------------------
Payload (128 bytes)
|-------------------------------------------------------------|
| BLOCK 1 |
==============================================================================
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 (128 bytes):
==============================================================================
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
Uri-Path: invalid-size
Block2 : NUM: 1, M: false, SZX: 3 (128 bytes)
==============================================================================
5. Servers responds with the second block, but the block size is greater
than the one specified in the request:
==============================================================================
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: false, SZX: 4 (256 bytes)
------------------------------------------------------------------------------
Payload (191 bytes)
|-------------------------------------------------------------|
| BLOCK 3 |
|-------------------------------------------------------------|
==============================================================================
6. Client receives the #5 block, but recognizes that its SZX is greater than
the one the client expected and ignores it.
7. After `exchangeTimeout` ms have passed, the client emits
the `exchange timeout` event and the request emits the `timeout` 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)
{
var request = {
type: Message.Type.CON,
code: Message.Code.GET,
uri: '/blocks/get/out-of-order'
};
var resWithBlock0 = {
type: Message.Type.ACK,
code: Message.Code.CONTENT,
id: 0x0001,
block2: {num: 0, m: true, size: 128},
contentFormat: 'text/plain;charset=utf-8',
payload: new Buffer(
'|-------------------------------------------------------------|\n' +
'| BLOCK 1 |\n'
)
};
var reqForBlock1 = {
type: Message.Type.CON,
code: Message.Code.GET,
id: 0x0002,
uri: '/blocks/get/out-of-order',
block2: {num: 1, m: false, size: 128}
};
var resWithBlock1 = {
type: Message.Type.ACK,
code: Message.Code.CONTENT,
id: reqForBlock1.id,
block2: {num: 1, m: false, size: 256},
contentFormat: 'text/plain;charset=utf-8',
payload: new Buffer(
'|-------------------------------------------------------------|\n' +
'| BLOCK 3 |\n' +
'|-------------------------------------------------------------|'
)
};
ctx.socket.expectRequest(request);
ctx.socket.scheduleResponse(50, resWithBlock0);
ctx.socket.expectRequest(50, reqForBlock1);
ctx.socket.scheduleResponse(100, resWithBlock1);
var req = ctx.client.request(Message.fromObject(request));
var eventSpy = sinon.spy(req, 'emit');
ctx.clock.tick(3600000);
return function assert()
{
ctx.socket.assert();
sinon.assert.callCount(eventSpy, 3);
sinon.assert.calledWith(
eventSpy, 'acknowledged', sinon.match.instanceOf(Message)
);
sinon.assert.calledWith(
eventSpy, 'block received', sinon.match.instanceOf(Message)
);
sinon.assert.calledWith(eventSpy, 'timeout');
eventSpy.args[0][0].should.be.equal('acknowledged');
sinon.assert.coapMessage(
eventSpy.args[0][1], resWithBlock0, "Invalid ACK."
);
eventSpy.args[1][0].should.be.equal('block received');
sinon.assert.coapMessage(
eventSpy.args[1][1],
resWithBlock0,
"Invalid `block received` (#1)."
);
eventSpy.args[2][0].should.be.equal('timeout');
};
});