http_middleware 0.0.2

A middleware library for Dart http library.

http_middleware

A middleware library for Dart http library.

Getting Started

http_middleware is a module that lets you build middleware for Dart's http package.

Installing

Include this library in your package.

http_middleware: any

Importing

import 'package:http_middleware/http_middleware.dart';

###Using http_middleware Create an object of HttpWithMiddleware by using the build factory constructor.

The build constructor takes in a list of middlewares that are built for http_middleware. One very nice middleware you can use is the http_logger package. We will use that here for demonstration.

(You can also build your own middleware for http_middleware. Check out Build your own middleware)

HttpWithMiddleware http = HttpWithMiddleware.build(middlewares: [
    Logger(),
]);

That is it! Now go ahead and use this http object as you would normally do.

//Simple POST request
var response = await http.post('https://jsonplaceholder.typicode.com/posts/',
    body: {"testing", "1234"});

//Simple GET request
var response = await http.get('https://jsonplaceholder.typicode.com/posts/');

HttpWithMiddleware supports all the functions that http provides.

http.get(...);
http.post(...);
http.put(...);
http.delete(...);
http.head(...);
http.patch(...);
http.read(...);
http.readBytes(...);

Using a Client

If you want to use a http.Client in order to keep the connection alive with the server, use HttpClientWithMiddleware.

HttpClientWithMiddleware httpClient = HttpClientWithMiddleware.build(middlewares: [
     Logger(),
]);

var response = await httpClient.post('https://jsonplaceholder.typicode.com/posts/',
    body: {"testing", "1234"});

var response = await httpClient.get('https://jsonplaceholder.typicode.com/posts/');

//Don't forget to close the client once done.
httpClient.close();

Building your own middleware

Building your own middleware with http_middleware is very easy, whether you want to create a package for http_middleware or you want to build a middleware solely for your own project.

Once you have the necessary imports, all you have to do is extend the MiddlewareContract class which will give you access to all the functions in http module. You can then @override all the required functions you need to add middleware to.

Example (A simple logger that logs data in a POST request):

class CustomMiddleWare extends MiddlewareContract {
   @override
   Function(http.Response) interceptPost({RequestData data}) {
       print("POST Url: ${data.url}");
       return (response) {
           print("POST Status: ${response.body}");
       };
   }
}