HTTP Status Codes 400 to 416 Explained Client Error Responses in Web Development

HTTP Status Codes 400 to 416 Explained

Discover the meanings of HTTP status codes 400 to 416, including Bad Request, Unauthorized, Not Found, and more. Learn how these client error responses impact web development and troubleshooting.

HTTP Status Codes 400 to 416 Explained

Understanding HTTP Status Codes: 400 to 416 (Client Errors)

• 400 - Bad Request: The request has malformed syntax or is invalid.
• 401 - Unauthorized: Authentication is required and has failed or not been provided.
• 402 - Payment Required: Reserved for future use, sometimes used for paid access APIs.
• 403 - Forbidden: The request is understood but denied by the server.
• 404 - Not Found: The requested resource is unavailable.
• 405 - Method Not Allowed: The used HTTP method is not allowed for the resource.
• 406 - Not Acceptable: The requested response format is not acceptable.
• 407 - Proxy Authentication Required: Authentication is required through a proxy.
• 408 - Request Timeout: The server timed out waiting for the request.
• 409 - Conflict: The request conflicts with the current server state.
• 410 - Gone: The resource has been removed permanently.
• 411 - Length Required: The request lacks the required content length.
• 412 - Precondition Failed: A precondition in the request failed.
• 413 - Request Entity Too Large: The request size exceeds the server limit.
• 414 - URI Too Long: The requested URL is too long.
• 415 - Unsupported Media Type: The media type is unsupported by the server.
• 416 - Requested Range Not Satisfiable: The requested range is not valid.

Frequently Asked Questions (FAQs)

Q1: What is the most common 4xx error?

A1: The most common 4xx error is 404 Not Found, which occurs when a requested resource cannot be found on the server.

Q2: How can I fix a 400 Bad Request error?

A2: A 400 Bad Request error can be fixed by checking the request URL, clearing browser cache, or ensuring the request syntax is correct.

Q3: Why do I get a 403 Forbidden error?

A3: A 403 Forbidden error occurs when you lack the necessary permissions to access a resource.

Q4: What should I do when I get a 408 Request Timeout?

A4: If you encounter a 408 Request Timeout, check your internet connection, retry the request, or increase the request timeout settings.

HTTP Status Codes 400 to 416 Explained