HTTP Response Codes
HTTP status codes are codes returned by a [[server]] in response to a client's request. The codes are part of the HTTP response and indicate the status of the request. The codes are mainly divided into 5 categories:
- 1xx (Informational) - indicate a provisional response and are less common in daily use.
- 2xx (Successful) - indicate the client's request was successfully received, understood and accepted.
- 3xx (Redirection) - signify that further action needs to be taken by the client to complete the request.
- 4xx (Client Error) - represent errors made by the client.
- 5xx (Server Error) - indicate problems on the server's end.
Some of the most common HTTP status codes seen are:
| HTTP Status Code | Description |
|---|---|
| 200 OK | Page has been fetched, action accepted and delivered to the client |
| 301 Permanent Redirect | Page requests has moved to a new URL which is permanent |
| 302 Temporary Redirect | Requested URL redirected to another website which is temporary |
| 304 Not Modified | Request not changed so client can resume the same cache in the future |
| 400 Bad Request | Server not able to understand anything |
| 401 Unauthorized | Requires user authentication |
| 403 Forbidden | Request understood, but refuses to fulfill it |
| 404 Not Found | Request a URL and the server has not found anything |
| 500 Internal Server Error | Requesting a URL is not fulfilled as the server encounters an unexpected condition |
| 501 Not Implemented | Server not able to recognize the request method and not able to support any resource |