Rest api client

Abstraction for communicating with REST API in flutter projects. Incorporates exception handling and jwt with refresh token authorization. You can also find this package on pub as rest_api_client

Usage

  //This must be called once per application lifetime
  await RestApiClient.initFlutter();

  IRestApiClient restApiClient = RestApiClient(
    restApiClientOptions: RestApiClientOptions(
      //Defines your base API url eg. https://mybestrestapi.com
      baseUrl: 'https://mybestrestapi.com',

      //Toggle logging of your requests and responses
      //to the console while debugging
      logNetworkTraffic: true,

      //Sets the flag deciding if the instance of restApiClient should retry to
      //submit the request after the device reconnects to the network
      keepRetryingOnNetworkError: true,

      //Define refresh token endpoint for RestApiClient
      //instance to use the first time response status code is 401
      refreshTokenEndpoint: '/Authentication/RefreshToken',

      //Define the name of your api parameter name
      //on RefreshToken endpoint eg. 'refreshToken' or 'value' ...
      refreshTokenParameterName: 'refreshToken',

      //This method is called on successfull call to refreshTokenEndpoint
      //Provides a way to get a jwt from response, much like
      //resolveValidationErrorsMap callback
      resolveJwt: (response) => response['jwt'],

      //Much like resolveJwt, this method is used to resolve
      //refresh token from response
      resolveRefreshToken: (response) => response['refreshToken'],

      //If your api returns validation errors different from
      //default format that is response.data['validationErrors']
      //you can override it by providing this callback
      resolveValidationErrorsMap: (response) => response['errors']['validation'],
    ),
  );

  //init must be called, preferably right after the instantiation
  await restApiClient.init();
  //Use restApiClient from this point on

If you are using authentication in your app probably it would look something like this

  final response = await restApiClient.post(
    '/Authentication/Authenticate',
    data: {
      'username': 'john',
      'password': 'Flutter_is_awesome1!'
    },
  );

  final jwt = response.data['jwt'];
  final refreshToken = response.data['refreshToken'];

Let's asume that somehow we got jwt and refresh token, you probably pinged your api Authentication endpoint to get these two values.

  final jwt = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwiZmx1dHRlciI6IkZsdXR0ZXIgaXMgYXdlc29tZSIsImNoYWxsZW5nZSI6IllvdSBtYWRlIGl0LCB5b3UgY3JhY2tlZCB0aGUgY29kZS4gWW91J3JlIGF3ZXNvbWUgdG9vLiIsImlhdCI6MTUxNjIzOTAyMn0.5QJz8hhxYsHxShS4hWKdHzcFH_IsQQZAnWSEcHJkspE';
  final refreshToken = 'c91c03ea6c46a86cbc019be3d71d0a1a';

  //set the authorization
  restApiClient.addAuthorization(jwt: jwt, refreshToken: refreshToken);

  //Create authorized requests safely
  restApiClient.get('/Products');

Add parameters to your requests

  restApiClient.get(
    '/Products',
    queryParameters: {
      'name': 'darts'
    },
  );

Ignore server errors that might happen in the next request

  restApiClient.exceptionOptions.showInternalServerErrors = false;

  try {
    restApiClient.get(
      '/Products',
      queryParameters: {
        'name': 'darts'
      },
    );
  } catch (e) {
    print(e);
  }

Ignore all exceptions that might happen in the next request

  restApiClient.exceptionOptions.disable();

  //Possible errors are ignored for this request
  restApiClient.post(
    '/Products/Reviews/234',
    data: {
      'grade': 5,
      'comment': 'Throwing darts is not safe but upgrading to dart ^2.12.1 is. #nullsafety'
    },
  );

  //Possible errors are handled for this request
  restApiClient.put(
    '/Products/Reviews/234',
    data: {
      'grade': 5,
      'comment': 'On the other hand throwing dartz is fun',
    },
  );

  restApiClient.delete('/Products/Reviews/234');