HTTP Request Headers, Body, and Response Codes in API Testing

This article provides a comprehensive overview of HTTP request headers, body, and response codes in API testing. It covers the purpose and common types of request headers such as Accept, Content-Type, User-Agent, Authorization, and Cookie, along with practical examples. The request body section explains different data formats including JSON, form-urlencoded, and multipart/form-data, with code examples for both JSON and form submissions. The response codes section details the classification of HTTP status codes (1xx, 2xx, 3xx, 4xx, 5xx) and their meanings, providing examples of successful responses (200 OK, 201 Created) and error responses (400 Bad Request, 401 Unauthorized, 404 Not Found, 500 Internal Server Error). The article also covers response code parsing in API testing scenarios, including validation of successful responses, error handling, and redirect processing. The summary emphasizes that understanding these core concepts is essential for effective API automation testing to ensure interface correctness and stability.