Http status codes Flashcards
100
Continue
The server has received the request headers and the client should proceed to send the request body.
200
OK
The request was successfully processed.
201
Created
The request was successful, and a new resource was created.
202
Accepted.
Indicates that a request has been accepted for processing, but processing has not been completed or may not have started.
204
No Content.
The request was successful; no content is returned.
205
Reset Content.
Indicates that the request has been successfully processed and the client should reset the document view.
206
Partial Content.
The response body contains the requested ranges of data as specified in the Range header of the request.
300
Multiple Choices.
Indicates that the request has more than one possible response The server should include content in the response that contains a list of resource metadata and URIs from which the user or user agent can choose.
301
Moved Permanently.
The requested resource has been permanently moved to a new URL.
302
Found.
The resource has temporarily moved to another URL.
304
Not Modified.
This response code is sent when the request is a conditional GET or HEAD request with an If-None-Match or an If-Modified-Since header and the condition evaluates to ‘false’. It confirms that the resource cached by the client is still valid and that the server would have sent a 200 OK response with the resource if the condition evaluated to ‘true’.
307
Temporary Redirect.
The method and the body of the original request are reused to perform the redirected request. In the cases where you want the request method to be changed to GET.
308
Permanent Redirect.
The request method and the body will not be modified by the client in the redirected request
400
Bad request.
The server could not process the request due to client-side error.
401
Unauthorized.
Authentication is required but has failed or not been provided.
403
Forbidden.
The server understands the request but refuses to authorize it.
404
Not Found.
The server cannot find the requested resource.
405
Method Not Allowed.
The HTTP method used is not allowed for the resource.
406
Not Acceptable.
The server cannot provide a response matching the client’s accept headers.
408
Request Timeout.
409
Conflict.
413
Content Too Large.
410
Gone.
415
Unsupported Media Type.
418
I’m a teapot.
422
Unprocessable Content.
425
Too Early.
426
Upgrade Required
429
Too Many Requests.
500
Internal Server Error
The server encountered an unexpected error.
501
Not Implemented
502
Bad Gateway
The server received an invalid response from an upstream server.
503
Service Unavailable
:)
504
Gateway Timeout
The server did not receive a timely response from an upstream server.
Which 30x statuses preserves original method and body?
307, 308
Which 30x statuses no (or never) guarantees on method preservation?
300, 301, 302
Which of these statuses (300, 301, 302, 304, 307, 308) impacts for Search engines update their indexes?
301, 308
301 and 308: Critical for SEO when permanently moving content. They signal search engines to update the index to the new URL and transfer ranking power.
302 and 307: Treated as temporary; search engines keep the old URL in their index, so use them only for non-permanent changes.
300: Avoid for SEO; it’s ambiguous and may confuse search engines.
304: No impact on ranking; purely for performance optimization.
