HttpClient is a lightweight HTTP client library based on the Fetch API, offering a simple and flexible API for making HTTP requests. This library allows you to easily perform basic HTTP operations and customize requests and responses using interceptors.

Features

• Supports GET, POST, PUT, PATCH, DELETE request methods
• Reduce code redundancy by setting a base URL
• Customize requests and responses with interceptor support
• Provides type safety for catching errors at compile time

Installation

npm

npm install @hanse-kim/http-client

yarn

yarn add @hanse-kim/http-client

Usage

Creating an Instance

You can create a basic HttpClient instance as follows:

import { HttpClient } from 'your-http-client';

const client = new HttpClient({
  baseUrl: 'https://api.example.com',
  headers: {
    Authorization: 'Bearer your-token',
  },
});

GET Request

client
  .get<User[]>('/users')
  .then((response) => console.log(response.data))
  .catch((error) => console.error(error));

POST Request

client
  .post<User>('/users', { name: 'John Doe' })
  .then((response) => console.log(response.data))
  .catch((error) => console.error(error));

PUT Request

client
  .put<User>('/users/1', { name: 'Jane Doe' })
  .then((response) => console.log(response.data))
  .catch((error) => console.error(error));

DELETE Request

client
  .delete<void>('/users/1')
  .then(() => console.log('User deleted'))
  .catch((error) => console.error(error));

Using Interceptors

You can intercept and modify requests and responses:

const client = new HttpClient({
  interceptors: {
    requestInterceptor: (request) => {
      console.log('Request:', request);
      return request;
    },
    responseInterceptor: (response) => {
      console.log('Response:', response);
      return response;
    },
  },
});

Error Handling

If the response has an error status, an HttpClientError exception will be thrown.

client
  .get<User>('/invalid-url')
  .then((response) => console.log(response.data))
  .catch((error: HttpClientError<any>) => {
    console.error(`Error ${error.status}:`, error.body);
  });

API

HttpClient Class

• constructor(options?: HttpClientOptions): Creates a new HttpClient instance.
• get<T>(url: string, options?: RequestOptions): Performs a GET request.
• post<T>(url: string, body: RequestBody, options?: RequestOptions): Performs a POST request.
• put<T>(url: string, body: RequestBody, options?: RequestOptions): Performs a PUT request.
• patch<T>(url: string, body: RequestBody, options?: RequestOptions): Performs a PATCH request.
• delete<T>(url: string, options?: RequestOptions): Performs a DELETE request.

HttpClientOptions

• baseUrl: Sets the base URL for all requests.
• headers: Sets default headers for all requests.
• interceptors: Allows you to define request and response interceptors.

HttpClientRequest

• url: The URL to request.
• method: The HTTP method (GET, POST, PUT, PATCH, DELETE).
• body: The data to send with the request.
• query: Query parameters to append to the URL.

HttpClientResponse

• data: Contains the response data.
• status: The HTTP status code of the response.

License

MIT Licensed.