Learn the crucial difference between HTTP 401 Unauthorized and 403 Forbidden status codes. Discover when to use each response for proper authentication and authorization in web applications.
Learn how to properly POST JSON data to Spring REST applications using cURL. Fix 415 Unsupported Media Type errors with correct Content-Type headers and JSON formatting. Complete guide with examples.
Learn the main causes of network failures with 502 and 400 errors, problem diagnosis, and solution methods. Complete guide for system administrators and developers.
Learn the appropriate HTTP response code when POST requests attempt to create resources that already exist. Discover why 409 Conflict is the recommended status code and explore alternative approaches for your REST API design.
Learn the best HTTP status codes for successful PUT and DELETE operations in REST APIs. Discover when to use 204 No Content, 200 OK, or 202 Accepted based on RFC standards and API design requirements.
Learn the correct HTTP status codes for successful PUT and DELETE operations in REST APIs. Discover when to use 200 OK vs 204 No Content with practical examples and best practices.