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block-019-put-timeout.js
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block-019-put-timeout.js
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/*
Handle a timeout of a blockwise PUT request:
1. User sends a request with the `blockSize` option set to `128`:
==============================================================================
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 | PUT | 1
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Uri-Path : blocks
Uri-Path : put
Content-Format: text/plain;charset=utf-8
------------------------------------------------------------------------------
Payload (128 bytes)
|-------------------------------------------------------------|
| BLOCK 1 |
|-------------------------------------------------------------|
| BLOCK 2 |
|-------------------------------------------------------------|
==============================================================================
2. Client recognizes that the payload of the #1 request is bigger than
the specified block size, so it constructs and sends the first Block1 request
instead:
==============================================================================
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 | PUT | 2
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Uri-Path : blocks
Uri-Path : put
Content-Format: text/plain;charset=utf-8
Block1 : NUM: 0, M: true, SZX: 3 (128 bytes)
------------------------------------------------------------------------------
Payload (128 bytes)
|-------------------------------------------------------------|
| BLOCK 1 |
==============================================================================
3. Server confirms 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 0 | 0x0002
1 | ACK | 0 bytes | 2.04 Changed | 2
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Block1: NUM: 0, M: true, SZX: 3 (128 bytes)
==============================================================================
4. Client receives the #3 confirmation. The #1 request emits the `acknowledged`
event and the `block sent` event.
5. Client sends a request with 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 | 0x0003
1 | CON | 0 bytes | PUT | 3
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Uri-Path : blocks
Uri-Path : put
Content-Format: text/plain;charset=utf-8
Block1 : NUM: 1, M: true, SZX: 3 (128 bytes)
------------------------------------------------------------------------------
Payload (128 bytes)
|-------------------------------------------------------------|
| BLOCK 2 |
==============================================================================
6. The #5 request is lost along the way...
7. Client retransmits the #5 request (1)...
8. The #5 request is lost along the way...
9. Client retransmits the #5 request (2)...
10. The #5 request is lost along the way...
11. Client retransmits the #5 request (3)...
12. The #5 request is lost along the way...
13. Client retransmits the #5 request (4)...
14. The #5 request is lost along the way...
15. Client emits the `transaction timeout` event and the #1 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.PUT,
uri: '/blocks/put',
contentFormat: 'text/plain;charset=utf-8',
payload: new Buffer(
'|-------------------------------------------------------------|\n' +
'| BLOCK 1 |\n' +
'|-------------------------------------------------------------|\n' +
'| BLOCK 2 |\n' +
'|-------------------------------------------------------------|'
)
};
var reqWithBlock0 = {
type: request.type,
code: request.code,
id: 0x0002,
uri: request.uri,
block1: {num: 0, m: true, szx: 3},
contentFormat: request.contentFormat,
payload: request.payload.slice(0 * 128, 1 * 128)
};
var resToBlock0 = {
type: Message.Type.ACK,
code: Message.Code.CHANGED,
id: reqWithBlock0.id,
block1: {num: 0, m: true, szx: 3}
};
var reqWithBlock1 = {
type: request.type,
code: request.code,
id: 0x0003,
uri: request.uri,
block1: {num: 1, m: true, szx: 3},
contentFormat: request.contentFormat,
payload: request.payload.slice(1 * 128, 2 * 128)
};
ctx.socket.expectRequest(reqWithBlock0);
ctx.socket.scheduleResponse(50, resToBlock0);
ctx.socket.expectRequest(50, reqWithBlock1);
ctx.socket.expectRequest(50 + 2000, reqWithBlock1);
ctx.socket.expectRequest(2050 + 4000, reqWithBlock1);
ctx.socket.expectRequest(6050 + 8000, reqWithBlock1);
ctx.socket.expectRequest(14050 + 16000, reqWithBlock1);
var req = ctx.client.request(Message.fromObject(request), {
blockSize: 128
});
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 sent', sinon.match.instanceOf(Message)
);
sinon.assert.calledWith(eventSpy, 'timeout');
eventSpy.args[0][0].should.be.equal('acknowledged');
sinon.assert.coapMessage(
eventSpy.args[0][1], resToBlock0, "Invalid ACK."
);
eventSpy.args[1][0].should.be.equal('block sent');
sinon.assert.coapMessage(
eventSpy.args[1][1], resToBlock0, "Invalid `block sent` (#1)."
);
eventSpy.args[2][0].should.be.equal('timeout');
};
});