Installation and testing of COAP protocol under Linux environment

Recently in contact with the COAP protocol, an Internet of things protocol dedicated to restricted devices, downloaded its source code and wanted to install it under Linux. And because of the many programming languages, try Python and nodejs for the moment.

Python source Download

In the readme.md file, the installation method has been introduced very well, but in the implementation of the sudo pip install dist/coapthon-2.0.0.tar.gz-r requirements.txt when prompted missing Python.h header file, so it is known that the development package is not an Ann, so the installation Python2.7-dev

By default, the relevant executables and Coap Python libraries are in the/usr/local directory, such as coapserver.py,coapclient.py under Bin

Python Simple test

Execute the coapserver.py directly at the terminal:

Perform coapclient.py on another terminal:

At this point, the server has the following output:

Obviously, the service has received the customer's request, all have the relevant output. Since it is only a test and is not familiar with the relevant APIs, only visual results can be obtained.

If you use a browser as the client, that is, enter the domain name, click the Get command, under incoming, there is output, as shown:

JS Source Download

After downloading, the folder name is Node-coap and the command is executed:

sudo npm install Node-coap--save

Can see a lot of things output, with NPM ls (to be executed in the NPM install directory) command to verify the installed

JS Simple test

1, enter the Node-coap/examples directory, modify the Server.js

Const COAP    = require (' Coap ')     , server  = Coap.createserver () server.on (' Request ', function (req, res) {  Res.end (' Hello ' + req.url.split ('/') [1] + ' \ n ')}) Server.listen (function () {  console.log (' Server Started ')})

Modify Client.js

Const COAP  = require (' Coap ')     , req   = coap.request (' Coap://localhost/cshi ') req.on (' response ', function ( RES) {  res.pipe (process.stdout)}) Req.end ()

2. Implementation

Service side: Nodejs Server.js & (running in the background)

Client: Nodejs client.js

Firefox browser test (need to install copper plug-in, Firefox official, if not bring your own)

That is, after the client sends a request to the server, the server loopback Hello Cshi

We can also use the command-line tool to perform client simulations. Download NODE-CLI

sudo npm install node-cli-g (be sure to add-g)

As a result, relevant files, such as executables, are generated in/usr/local bin and Lib/node_modules Coap

Execution: Coap get Coap://localhost/cshi

The above two are all installed, NPM LS displays as follows:

Reference links

NPM Install usage: http://blog.csdn.net/haidaochen/article/details/8546796

Node-coap Tutorial: http://blog.csdn.net/xukai871105/article/details/39213061

Installation and testing of COAP protocol under Linux environment