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coap-packet
Advanced tools
CoAP-Packet is an highly experimental generator and parser of CoAP packets.
What is CoAP?
Constrained Application Protocol (CoAP) is a software protocol intended to be used in very simple electronics devices that allows them to communicate interactively over the Internet. - Wikipedia
This library follows the draft-18 of the standard.
It does not provide any CoAP semantics, it just parses the protocol.
CoAP-packet is an OPEN Open Source Project, see the Contributing section to find out what this means.
This has been tested only on node v0.10.
$: npm install coap-packet --save
The following example opens an UDP client and UDP server and sends a CoAP message between them:
const dgram = require('dgram')
, coapPacket = require('coap-packet')
, parse = packet.parse
, generate = packet.generate
, payload = new Buffer('Hello World')
, message = generate({ payload: payload })
, port = 41234
, client = dgram.createSocket("udp4")
, server = dgram.createSocket("udp4")
server.bind(port, function() {
client.send(message, 0, message.length, 41234, "localhost", function(err, bytes) {
client.close()
})
})
server.on('message', function(data) {
console.log(parse(data).payload.toString())
server.close()
})
The parse
function takes a buffer and returns a JS object that
follows a particular format.
The generate
function takes a JS object that
follows a particular format and transform it into
a CoAP packet.
The JS representation of a CoAP packet is:
{
token: new Buffer(4)
, code: '0.01'
, messageId: 42
, payload: new Buffer(200)
, options: [{
name: 'If-Match'
, value: new Buffer(5)
}, {
name: 'Uri-Path'
, value: new Buffer('hello')
}]
}
Instead of numerical codes, it also supports humanized names, e.g.
GET
, POST
, PUT
, DELETE
.
Numerical codes can also be specified in HTTP format, like 500
or
'404'
.
CoAP-Packet is an OPEN Open Source Project. This means that:
Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.
See the CONTRIBUTING.md file for more details.
Coap-Packet is only possible due to the excellent work of the following contributors:
Matteo Collina | GitHub/mcollina | Twitter/@matteocollina |
---|
Copyright (c) 2013 CoAP-Packet contributors (listed above).
Coap-Packet is licensed under an MIT +no-false-attribs license. All rights not explicitly granted in the MIT license are reserved. See the included LICENSE file for more details.
FAQs
Generate and Parse CoAP packets
The npm package coap-packet receives a total of 3,621 weekly downloads. As such, coap-packet popularity was classified as popular.
We found that coap-packet demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
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