P2Dev.ApiClient

The ApiClient package provides a streamlined, easy-to-use HTTP client for interacting with RESTful APIs following the P2.Dev API Style Specification. It simplifies the process of making API calls, handling authentication via JSON Web Tokens (JWT), refreshing tokens, and pre-/post-processing of HTTP requests and responses.

Features

• Automatic JWT Authentication: Automatically adds JWTs to requests when provided.
• Token Refreshing: Seamlessly refreshes tokens when necessary.
• Error Handling: Provides custom exceptions for various HTTP status codes, facilitating better error management.

Usage

Setting Up

Token Provider: AWS Cognito User Pools

Setting Up with AWS Cognito The P2Dev.ApiClient package includes a default token provider for AWS Cognito. To utilize this feature, you will need to configure the CognitoTokenProvider with the appropriate details from your AWS Cognito setup.

Required Information

To set up the CognitoTokenProvider, you will need the following information:

• ClientId: The client ID of your app client in the Cognito user pool.
• RedirectUri: The URI where the OAuth response can be sent and received by your app.
• PoolName: The name of your Cognito user pool.
• Region: The AWS region where your Cognito user pool is located.
• PoolId: The ID of your Cognito user pool.

Configuration Example

Here is a basic example of how to configure and use the CognitoTokenProvider within your application:

using P2Dev.ApiClient.Cognito; 
// Configure the Cognito Token Provider 
	CognitoTokenProvider tokenProvider = new CognitoTokenProvider { 
	ClientId = "YOUR_CLIENT_ID", 
	RedirectUri = "YOUR_REDIRECT_URI", 
	PoolName = "YOUR_POOL_NAME", 
	Region = "YOUR_COGNITO_REGION", 
	PoolId = "YOUR_POOL_ID" 
}; 

// Initialize the ApiClient with the token provider
ApiClientBase apiClient = new ApiClientBase { 
	TokenProvider = tokenProvider, 
	BaseURL = "YOUR_API_BASE_URL" 
}; 
// Now you can use the apiClient instance to make authenticated requests

Token Provider: Implement Your Own

First, implement the ITokenProvider interface to handle token acquisition and refreshing in your application:

public class MyTokenProvider : ITokenProvider {
// Implementation details here 
}

Initialize the ApiClientBase with your ITokenProvider and base URL:

var apiClient = new ApiClientBase {
    TokenProvider = new MyTokenProvider(),
    BaseURL = "https://api.example.com/" 
};

Making Requests

Use the SendAsync<T> method to make API calls. Specify the HTTP method, endpoint, and optionally, a request body and whether to retry on authentication failure:

var result = await apiClient.SendAsync<MyResponseType>(HttpMethod.Get, apiClient.GenURL("/my-endpoint"));`

Handling Tokens and Refreshing

The ApiClient handles adding the JWT to requests and refreshing tokens as needed. Implement the GetTokens and RefreshTokens methods in your ITokenProvider to integrate with your token service.