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block-016-post-blockwise-response-timeout.js
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block-016-post-blockwise-response-timeout.js
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/*
Handle a timeout of a blockwise response to a confirmable,
blockwise POST 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 1 0 | 0x0001
1 | CON | 0 bytes | POST | 1
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Uri-Path : blocks
Uri-Path : post
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 1 0 | 0x0002
1 | CON | 0 bytes | POST | 2
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Uri-Path : blocks
Uri-Path : post
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 Block1:
==============================================================================
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 | 2.01 Created | 2
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Block1: NUM: 0, M: true, SZX: 3 (128 bytes)
==============================================================================
4. Client receives the #3 confirmation. Request emits the`acknowledged` event
and the `block sent` event.
5. Client sends a request with the second Block1:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 0 0 | 0 0 0 0 | 0 0 0 0 0 0 1 0 | 0x0003
1 | CON | 0 bytes | POST | 3
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Uri-Path : blocks
Uri-Path : post
Content-Format: text/plain;charset=utf-8
Block1 : NUM: 1, M: true, SZX: 3 (128 bytes)
------------------------------------------------------------------------------
Payload (128 bytes)
|-------------------------------------------------------------|
| BLOCK 2 |
==============================================================================
6. Servers confirms the second Block1:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 1 0 | 0 0 0 0 | 0 1 0 0 0 1 0 0 | 0x0003
1 | ACK | 0 bytes | 2.01 Created | 3
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Block1: NUM: 1, M: true, SZX: 3 (128 bytes)
==============================================================================
7. Client receives the #6 confirmation. Request emits the`block sent` event.
8. Client sends a request with the third, last Block1:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 0 0 | 0 0 0 0 | 0 0 0 0 0 0 1 0 | 0x0004
1 | CON | 0 bytes | POST | 4
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Uri-Path : blocks
Uri-Path : post
Content-Format: text/plain;charset=utf-8
Block1 : NUM: 2, M: false, SZX: 3 (128 bytes)
------------------------------------------------------------------------------
Payload (63 bytes)
|-------------------------------------------------------------|
==============================================================================
9. Server confirms the last Block1 and starts a new Block2 exchange:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 1 0 | 0 0 0 0 | 0 1 0 0 0 1 0 0 | 0x0004
1 | ACK | 0 bytes | 2.01 Created | 4
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Content-Format: text/plain;charset=utf-8
Block1 : NUM: 2, M: false, SZX: 3 (128 bytes)
Block2 : NUM: 0, M: true, SZX: 3 (128 bytes)
------------------------------------------------------------------------------
Payload (128 bytes)
|-------------------------------------------------------------|
| block 1 |
==============================================================================
10. Client receives the #9 confirmation. Request emits the`block sent` event.
11. Client recognizes that the #9 response contains a Block2 option, and so
the request emits the `block received` event and the client waits for the next
block from the server.
12. Server sends the second Block2:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 0 0 | 0 0 0 0 | 0 1 0 0 0 1 0 0 | 0x4713
1 | CON | 0 bytes | 2.01 Created | 18195
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Content-Format: text/plain;charset=utf-8
Block2 : NUM: 1, M: true, SZX: 3 (128 bytes)
------------------------------------------------------------------------------
Payload (128 bytes)
|-------------------------------------------------------------|
| block 2 |
==============================================================================
13. Client receives the #12 Block2. Request emits the `block received` event
and the client sends the acknowledgement:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 1 0 | 0 0 0 0 | 0 0 0 0 0 0 0 0 | 0x4713
1 | ACK | 0 bytes | Empty | 18195
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
==============================================================================
14. Servers sends the third, last Block2:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 0 0 | 0 0 0 0 | 0 1 0 0 0 1 0 0 | 0x4714
1 | CON | 0 bytes | 2.01 Created | 18196
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
------------------------------------------------------------------------------
Content-Format: text/plain;charset=utf-8
Block2 : NUM: 2, M: false, SZX: 3 (128 bytes)
------------------------------------------------------------------------------
Payload (63 bytes)
|-------------------------------------------------------------|
==============================================================================
15. Client receives the #14 Block2. Request emits the `block received` event
and the client sends the acknowledgement:
==============================================================================
Version | Type | Token Length | Code | Message ID
0 1 | 1 0 | 0 0 0 0 | 0 0 0 0 0 0 0 0 | 0x4714
1 | ACK | 0 bytes | Empty | 18196
------------------------------------------------------------------------------
Remote Endpoint: 127.0.0.1
==============================================================================
16. Client recognizes that the #14 Block2 is the last one, and so the request
emits the `response` 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:99*/
var requestPayload =
'|-------------------------------------------------------------|\n' +
'| BLOCK 1 |\n' +
'|-------------------------------------------------------------|\n' +
'| BLOCK 2 |\n' +
'|-------------------------------------------------------------|';
var responsePayload = new Buffer(requestPayload.toLowerCase());
var request = {
type: Message.Type.CON,
code: Message.Code.POST,
uri: '/blocks/put',
contentFormat: 'text/plain;charset=utf-8',
payload: new Buffer(requestPayload)
};
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.CREATED,
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)
};
var resToBlock1 = {
type: Message.Type.ACK,
code: Message.Code.CREATED,
id: reqWithBlock1.id,
block1: {num: 1, m: true, szx: 3}
};
var reqWithBlock2 = {
type: request.type,
code: request.code,
id: 0x0004,
uri: request.uri,
block1: {num: 2, m: false, szx: 3},
contentFormat: request.contentFormat,
payload: request.payload.slice(2 * 128, 3 * 128)
};
var resToBlock2 = {
type: Message.Type.ACK,
code: Message.Code.CREATED,
id: reqWithBlock2.id,
contentFormat: request.contentFormat,
block1: {num: 2, m: false, szx: 3},
block2: {num: 0, m: true, szx: 3},
payload: responsePayload.slice(0 * 128, 1 * 128)
};
var serverBlock1 = {
type: Message.Type.CON,
code: Message.Code.CREATED,
id: 0x4713,
contentFormat: request.contentFormat,
block2: {num: 1, m: true, szx: 3},
payload: responsePayload.slice(1 * 128, 2 * 128)
};
var clientBlock1 = {
type: Message.Type.ACK,
code: Message.Code.EMPTY,
id: serverBlock1.id
};
ctx.socket.expectRequest(reqWithBlock0);
ctx.socket.scheduleResponse(50, resToBlock0);
ctx.socket.expectRequest(50, reqWithBlock1);
ctx.socket.scheduleResponse(100, resToBlock1);
ctx.socket.expectRequest(100, reqWithBlock2);
ctx.socket.scheduleResponse(150, resToBlock2);
ctx.socket.scheduleResponse(10150, serverBlock1);
ctx.socket.expectRequest(10150, clientBlock1);
var exchangeTimeout = 20000;
var req = ctx.client.request(Message.fromObject(request), {
blockSize: 128,
exchangeTimeout: exchangeTimeout
});
var eventSpy = sinon.spy(req, 'emit');
var expectedTimeoutTime = ctx.startTime + 10150 + exchangeTimeout;
var expectedTimeoutRequest = req;
var actualTimeoutTime = -1;
var actualTimeoutRequest = null;
ctx.client.on('exchange timeout', function(request)
{
actualTimeoutTime = Date.now();
actualTimeoutRequest = request;
});
ctx.clock.tick(3600000);
return function assert()
{
ctx.socket.assert();
sinon.assert.callCount(eventSpy, 7);
sinon.assert.calledWith(
eventSpy, 'acknowledged', sinon.match.instanceOf(Message)
);
sinon.assert.calledWith(
eventSpy, 'block sent', 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], 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('block sent');
sinon.assert.coapMessage(
eventSpy.args[2][1], resToBlock1, "Invalid `block sent` (#2)."
);
eventSpy.args[3][0].should.be.equal('block sent');
sinon.assert.coapMessage(
eventSpy.args[3][1], resToBlock2, "Invalid `block sent` (#3)."
);
eventSpy.args[4][0].should.be.equal('block received');
sinon.assert.coapMessage(
eventSpy.args[4][1], resToBlock2, "Invalid `block received` (#1)."
);
eventSpy.args[5][0].should.be.equal('block received');
sinon.assert.coapMessage(
eventSpy.args[5][1], serverBlock1, "Invalid `block received` (#2)."
);
eventSpy.args[6][0].should.be.equal('timeout');
actualTimeoutTime.should.be.equal(expectedTimeoutTime);
actualTimeoutRequest.should.be.equal(expectedTimeoutRequest);
};
});