Understanding HTTP Status Codes For Programmers

HTTP status codes

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Understanding HTTP status codes is crucial for developers who work with APIs, web services, or any client-server architecture. These three-digit codes represent the outcome of an HTTP request and are standardized across the web, allowing developers to understand the state and result of a particular request quickly.

Categorization of Status Codes

HTTP status codes are organized into five different classes:

• 1xx: Informational Responses
• 2xx: Successful Responses
• 3xx: Redirection Messages
• 4xx: Client Errors
• 5xx: Server Errors

1xx: Informational Responses

These codes are provisional responses and are rarely encountered.

100 Continue

This code is typically sent to indicate that the initial part of a request has been received and the client should proceed to send the remaining parts.

2xx: Successful Responses

200 OK

Meaning

The 200 OK status code is probably the best-known HTTP status code. It indicates…