The Donatello Web Server

This is Donatello, a dynamic web service written in Jolie.

You can use Donatello as is, to host dynamic content in the Donatello Templating language or simply as a host for static pages.

Donatello uses plain HTTP for serving content. To add encryption (HTTPS), we recommend combining it with a reverse proxy (for example, we like linuxserver/letsencrypt).

Quickstart guide (Linux)

For this part, we assume that you have Jolie installed on you machine.

To run Donatello, you will have to declare where the content of your web server is stored. This can be done in two ways:

• Pass the content directory as an argument. For example, if your content is in /var/www, then you should run the command jolie launcher.ol /var/www.
• Pass the content directory by using the environment variable DONATELLO_WWW. In this case, you just need to invoke jolie launcher.ol.

Examples

Basic tags

Assigning variables

...
${ x = 123}
${ y = x + 123}
...

This will not print anything to the page, but the variables will be available to print and/or manipulate.

Printing variables

...
${ x = 123} // This is not for printing, but just to assign a variable for us to print.
{{ x }}
...

Import data/services

Import JSON

${ use json data/user as user }

<h1>Welcome, {{ user.name }}</h1>

From the syntax, it is assumed that there is a json file at the location; data/, naming user.json.

Import Service

${ use service time }
...
${getCurrentDateTime@Time()(time)}

<p>The time is: {{ time }}</p>
...

In this case, the service is a built-in Jolie service, but it could be any Jolie service.

Include files/templates

Basic inclusion without params

${ include layout/header.html }

${ include menu.ol }

Include service as content with params

menu.ol

${param name:string}
<h1>Welcome, {{ name }}</h1>

user.ol

${ use json data/user as user }
...
${ include menu.ol name=user.name }
...

Control flow

If/else statements

${ use json data/user as user }
...
${ if user.age > 10 }

  <h1>Welcome, {{ user.name }}</h1>

${ else }

  <h1>Bye, {{ user.name }}</h1>

${ endif }
...

Foreach statements

${use json data/users as data}

...
<h1>List of all users...</h1>

${ for user in data.users }

  <p>Hi, {{ user.name }} your age is {{ user.age }}</p>

${ endfor }
...