common HTTP status codes

Status codes are three-digit numbers that web servers use to communicate the outcome of an HTTP (Hypertext Transfer Protocol) request made by a client (typically a web browser or application).

They provide a standardized way to indicate whether a request was successful, encountered an issue, or requires further action.

1. 2xx (Successful):

- These status codes indicate that the request was received, understood, and successfully processed.

- 200 OK: The request was successful, and the server is providing the requested content (e.g., a web page).

2. 3xx (Redirection):

- These status codes indicate that further action is needed to complete the request, often involving redirection to a different URL.

- 301 Moved Permanently: The requested resource has been permanently moved to a new location, and the client should update its bookmarks or links.

- 302 Found (or 307 Temporary Redirect): The requested resource is temporarily located at a different URL, and the client should use that URL for the current request.

3. 4xx (Client Error):

- These status codes indicate that there was an issue with the client's request, such as a malformed request or authentication problems.

- 400 Bad Request: The server didn't understand the request due to invalid syntax or missing parameters.

- 401 Unauthorized: Authentication is required, and the client's credentials are either missing or invalid.

- 403 Forbidden: The client is authenticated but doesn't have permission to access the requested resource.

- 404 Not Found: The requested resource could not be found on the server.

4. 5xx (Server Error):

- These status codes indicate that the server encountered an error or was unable to fulfill a valid request.

- 500 Internal Server Error: A generic error message indicating that something went wrong on the server, often due to a misconfiguration or a bug.

- 502 Bad Gateway: The server, while acting as a gateway or proxy, received an invalid response from the upstream server it accessed.

- 503 Service Unavailable: The server is temporarily unable to handle the request, typically due to maintenance or overloading.

Nishanth Pro tip-

HTTP status codes are like standardized messages from a web server to a client, informing it about the result of its request. They help users and developers understand what happened during the interaction with a website or web application. The first digit of the status code categorizes it, making it easy to identify whether the request was successful, needs redirection, or encountered an error.