retrofit 1.3.4

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retrofit.dart is an dio client generator using source_gen and inspired by Chopper and Retrofit.

Retrofit For Dart #

retrofit retrofit_generator Dart CI CircleCI Build Status

retrofit.dart is a type conversion dio client generator using source_gen and inspired by Chopper and Retrofit.

Usage #

Generator #

Add the generator to your dev dependencies

  retrofit: any
  logger: any  #for logging purpose

  retrofit_generator: any
  build_runner: any

Define and Generate your API #

import 'package:json_annotation/json_annotation.dart';
import 'package:retrofit/retrofit.dart';
import 'package:dio/dio.dart';

part 'example.g.dart';

@RestApi(baseUrl: "")
abstract class RestClient {
  factory RestClient(Dio dio, {String baseUrl}) = _RestClient;

  Future<List<Task>> getTasks();

class Task {
  String id;
  String name;
  String avatar;
  String createdAt;

  Task({,, this.avatar, this.createdAt});

  factory Task.fromJson(Map<String, dynamic> json) => _$TaskFromJson(json);
  Map<String, dynamic> toJson() => _$TaskToJson(this);

then run the generator

# dart
pub run build_runner build

# flutter	
flutter pub run build_runner build

Use it #

import 'package:logger/logger.dart';
import 'package:retrofit_example/example.dart';
import 'package:dio/dio.dart';

final logger = Logger();
void main(List<String> args) {
  final dio = Dio();   // Provide a dio instance
  dio.options.headers["Demo-Header"] = "demo header";   // config your dio headers globally
  final client = RestClient(dio);
  client.getTasks().then((it) => logger.i(it));

More #

Type Conversion #

Before you use the type conversion, please make sure that a factory Task.fromJson(Map<String, dynamic> json) must be provided for each model class. json_serializable is the recommanded to be used as the serialization tool.

  Future<List<Task>> getTasks();

class Task {
  String name;
  factory Task.fromJson(Map<String, dynamic> json) => _$TaskFromJson(json);

HTTP Methods #

The HTTP methods in the below sample are supported.

  Future<Task> getTask(@Path("id") String id);

  Future<String> queries(@Queries() Map<String, dynamic> queries);

  Future<String> namedExample(
      @Query("apikey") String apiKey,
      @Query("scope") String scope, 
      @Query("type") String type,
      @Query("from") int from

  Future<Task> updateTaskPart(
      @Path() String id, @Body() Map<String, dynamic> map);

  Future<Task> updateTask(@Path() String id, @Body() Task task);

  Future<void> deleteTask(@Path() String id);

  Future<Task> createTask(@Body() Task task);

  Future<void> createNewTaskFromFile(@Part() File file);

  Future<String> postUrlEncodedFormData(@Field() String hello);

Get orignal HTTP reponse #

  Future<HttpResponse<Task>> getTask(@Path("id") String id)

  Future<HttpResponse<List<Task>>>> getTasks()

HTTP Header #

  • Add a HTTP header from the parameter of the method

      Future<Task> getTasks(@Header("Content-Type") String contentType );
  • Add staitc HTTP headers

      @Headers(<String, dynamic>{
          "Content-Type" : "application/json",
          "Custom-Header" : "Your header"
      Future<Task> getTasks();

Error Handling #

catchError(Object) should be used for capturing the exception and failed response. You can get the detailed response info from DioError.response.

 }).catchError((Object obj) {
    // non-200 error goes here.
    switch (obj.runtimeType) {
      case DioError:
        // Here's the sample to get the failed response error code and message
        final res = (obj as DioError).response;
        logger.e("Got error : ${res.statusCode} -> ${res.statusMessage}");


Multiple endpoints support #

If you want to use multiple endpoints to your RestClient, you should pass your base url when you initiate RestClient. Any value defined in RestApi will be ignored.

@RestApi(baseUrl: "this url will be ignored if baseUrl is passed")
abstract class RestClient {
  factory RestClient(Dio dio, {String baseUrl}) = _RestClient;

final client = RestClient(dio, baseUrl: "your base url");

If you want to use the base url from dio.option.baseUrl, which has lowest priority, please don't pass any parameter to RestApi annotation and RestClient's structure method.

pub points


retrofit.dart is an dio client generator using source_gen and inspired by Chopper and Retrofit.

Repository (GitHub)
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API reference




dio, meta


Packages that depend on retrofit