Autobahn part 1: installing on Opensuse

As every web developer should do, I'm exploring the new wonderful capabilities of modern browsers.
On of the most powerful is websocket technology:
WebSocket is a web technology providing for bi-directional, full-duplex communications channels over a single TCP connection.
Nice, isn't it?
By the way I am learning Python and first examples are very boring, so I decided to try something really interesting: Autobahn.
From official site: Autobahn provides Open-Source client and server implementations of WebSocket and WAMP.
I thought this could be a good start point to improve knowledge of Python and websockets at the same time.
So I pointed to http://autobahn.ws/python/getstarted and followed the instructions, but on my OpenSuse 12.1 I couldn't get Autobahn installed.
In this first post you can find how to get it running.
The two suggested methods (from package and from source) have the same problem, so I'll use the package method, because there are less instructions to write and, you know, I'm lazy.
You should  use the following command:

easy_install autobahn

but this produces errors about missing headers during compilation.
With a little help from Google I found how to get rid of these errors.
You have to install Python's development package (and GCC, if is not already installed):

zypper in python-devel
zypper in gcc

Now you can go on to the first example, which is perfectly working.
If you copy and paste the code into your editor you just have to modify line 29 in myclient.html removing the whitespace in </script> tag.
I'm reading the tutorials and I'll be back with something useful soon (hope so).

Commenti

Posta un commento

Post popolari in questo blog

Jolie on Azure Functions

Immagine
Hi all. Some weeks ago Azure Functions' team released (as a preview) custom handlers . From the official doc: Custom handlers are best suited for situations where you want to: Implement a function app in a language that's not officially supported . Implement a function app in a language version or runtime not supported by default. Provide more granular control over the function app execution environment. I think this is a really powerful feature and you can actually find a lot of articles showing how to leverage it to write functions in Go, PHP, etc Now I'm going to add yet another programming language to the list: Jolie . Again, from the documentation: To implement a custom handler, you need the following aspects to your application: A host.json file at the root of your app A function.json file for each function (inside a folder that matches the function name) A command, script, or executable, which runs a web server In addition, you have to supply a
Continua a leggere

Gateway Consorzio Triveneto per WP e-commerce

Recentemente ho dovuto integrare il gateway di pagamento del Consorzio Triveneto  nel plugin WP e-commerce , uno dei più noti plugin di commercio elettronico per Wordpress. All'inizio pensavo di utilizzare l'ottima classe PgConsTriv  di Davide Gullo, poi ho realizzato un'integrazione veramente minimale partendo dagli esempi forniti dal Consorzio e dalla documentazione di WP e-commerce. E' puro spaghetti-code ma forse a qualcuno può tornare utile :) Di seguito il codice del nuovo gateway da salvare nel folder /wp-content/plugins/wp-e-commerce/wpsc-merchants/ del vostro server. Tutte le funzioni andrebbero raccolte in un unico file (compresi i callback di ritorno dal gateway), per intenderci $responseURL dovrebbe essere qualcosa del genere: get_option('siteurl')."/?constriv=ok"; e quindi tutte le azioni verrebbero gestite dalla funzione  gateway_constriv_gateway,  purtroppo ho avuto qualche problema nella gestione degli indirizzi da parte del ga
Continua a leggere

Jolie micro services on Kubernetes

Jolie is a (micro) service-oriented language. Jolie's capabilities work well with Docker and you can find an example in the official documentation here . So d eploying a Jolie service in a Docker container is quite easy. Now it's time to go onboard with Kubernetes ;-) This is only a little demo on how to set up a Kubernetes environment on your PC (thanks to minikube) and build up a scalable clusterized version of Jolie's "Hello world" example. You can find Jolie examples on this GitHub project . What we are going to do now is to transform "01_getting_started" sample (which simply twices a number) into a powerful Kubernetes scalable app (doing exactly the same thing, but in a cool way). If you object that this is very unreasonable, I have to remind you that it is perfectly aligned with today's software industry standards. :-P To be honest I'm not going to explain what Kubernetes is and how it does what it does, so please go read a
Continua a leggere