HTTP Response Codes
HTTP defines forty standard status codes that can be used to convey the results of a client’s request. The status codes are divided into the five categories presented below.
CATEGORY
DESCRIPTION
1xx: Informational
Indicates that the client's request is being processed.
2xx: Success
Indicates that the client’s request was accepted successfully.
3xx: Redirection
Indicates that the client must take some additional action in order to complete their request.
4xx: Client Error
Indicates an error for which the client is responsible.
5xx: Server Error
Indicates an error for which the server is responsible.
Below are examples of the most common HTTP codes you will encounter in the logs:
HTTP Code
Description
200
OK: the standard response for successful HTTP requests.
301
Used for URL redirection
400
Bad Request
401
Unauthorized—authentication has failed
403
Forbidden—request refused by Reblaze or origin server
404
Destination not found
405
Method not allowed
408
Request timeout
413
Payload too large
414
Request-URI too long
444
No Response (nginx)
499
Client Closed Request (nginx)
500
Internal Server Error
503
Service Unavailable—Server is unable to handle the request
505
HTTP version not supported
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