rest_dart 0.1.1

rest_dart #

A library for automating much of the minutia of creating a rest interface. This mostly means automatically sending the correct error messages when a request is invalid, and some automatic header handling, such as:

  • Automatic 204 messages when your resource returns no data but is still succesful
  • Automatic 404 messages when a requested resource does not exist.
  • Automatic 405 errors when a method is not valid for a resource.
  • Automatic 406 errors when requested content type is not available (currently handled globally), or is not a valid content type.
  • Automatic handling of the OPTIONS method, and automatic Allow header generation.


  • The error handling outputs the errors as JSON. This needs to be more flexible, and overridable.
  • Per-resource content type support.
  • Add support for variable URL prefixes. Currently assumes running right under the host name/ip.
  • Change rest event handlers to be generic functions instead of classes.
  • Sets VERY generous Access-Control-Allow-Origin and Access-Control-Allow-Methods to allow cross-domain testing (this will be chagned to be mroe secure in the future).


// Import the package
import 'package:rest_dart/rest_dart.dart';

// Create the server object.
RestServer rest = new RestServer();

// If you don't add a content type, the server will throw an error on the first request.
rest.AddDefaultContentType(new ContentType("application", "json", charset: "utf-8"));

// Create a REST resource, along with the regex for recognizing its path.
RestResource resource = new RestResource(r'^/?$');

// Create a method handler
Future DeleteHandler(ContentType type, String path, Map<String, String> args) {
  return new Future.sync(() {
    return "test";

// Add the method handler to the resource 
resource.SetMethodHandler("DELETE", DeleteHandler);

// Add the resource to the server,

// Start the server. This handles creating the HTTP server as well.

// Begin requesting from the server!


So, if something goes wrong and you need to send an error message back to the user, just throw a RestException!

RestException(this.Code, this.Message, [this.InnerException = null]);

This will cause the server to send back the HTTP code you specify, and be presented with your message. Make sure to throw it through a future, so that it can be caught by the higher-up logic:

Future DeleteHandler(ContentType type, String path, Map<String, String> args) {
  return new Future.sync(() {
    throw new RestException(500,"I don't like you");

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  rest_dart: ^0.1.1

2. Install it

You can install packages from the command line:

with pub:

$ pub get

Alternatively, your editor might support pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:rest_dart/rest_dart.dart';
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The package version is not analyzed, because it does not support Dart 2. Until this is resolved, the package will receive a health and maintenance score of 0.

Analysis issues and suggestions

Support Dart 2 in pubspec.yaml.

The SDK constraint in pubspec.yaml doesn't allow the Dart 2.0.0 release. For information about upgrading it to be Dart 2 compatible, please see


Package Constraint Resolved Available
Direct dependencies
Dart SDK 1.3.6