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Run Dart in Apache web server

Posted by Seth Ladd

Today, Sam McCall announced mod_dart: the ability to run Dart apps embedded in Apache! Just like PHP, Perl, Python, and many other scripting languages, you can now use Dart to power your server-side web apps from inside the Apache web server.

From Sam's post:

I embedded the Dart VM in an Apache module, which allows it to host web applications written in Dart.
Install mod_dart, and drop this hello.dart file in your web server directory:

  main() {
    response.headers.set('Content-Type', 'text/html');
    response.outputStream.writeString('<h1>Hello, dart!</h1>');

What happens?
Every time someone visits /hello.dart, main() is called within a new isolate.
The dart:apache library provides access to the HttpRequest and HttpResponse objects, which are like in dart:io (except the input/output streams are synchronous).
You can add entries in httpd.conf to snapshot your scripts on startup, which makes them load much faster (until you edit them).

How to install?
It's a bit tricky at the moment, and involves building Dart from source (I hope to have binaries soon).
See the readme for details. (Describes mac/linux, I have no idea about windows...)
Note: I wouldn't put this on a public host for now, there are probably bugs!

Let me know if it's interesting, buggy, or broken!

Join the mailing list discussion and give it a shot!

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Posted by Seth Ladd

(This is an "oldie but a goodie" post originally written by Bob Nystrom. It is being posted here as the explanations still ring true.)

Bob writes:

"static", "final", and "const" mean entirely distinct things in Dart:

"static" means a member is available on the class itself instead of on instances of the class. That's all it means, and it isn't used for anything else. static modifies *members*.

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"const" has a meaning that's a bit more complex and subtle in Dart. const modifies *values*. You can use it when creating collections, like const [1, 2, 3], and when constructing objects (instead of new) like const Point(2, 3). Here, const means that the object's entire deep state can be determ…