Status Codes

100

Continue

The client continues sending the request.

This temporary response is used to inform the client that some requests have been received and not rejected by the server.

101

Switching Protocols

Switch protocols. A protocol can only be switched to a more advanced one.

For example, the current HTTP protocol is switched to a later version.

201

Created

The request has been fulfilled and resulted in a new resource being created.

202

Accepted

The request has been accepted, but has not finished being processed yet.

203

Non-Authoritative Information

The server successfully processed the request, but is returning information that may be from another source.

204

NoContent

The request has been successfully implemented, but the HTTP response does not contain a response body.

This status code is returned in response to an HTTP OPTIONS request.

205

Reset Content

The server has fulfilled the request, but the requester is required to reset the content.

206

Partial Content

The server has successfully processed a part of the GET request.

300

Multiple Choices

The response contains a list of resource characteristics and addresses from which a user terminal (such as a browser) can choose the most appropriate one.

301

Moved Permanently

This and all future requests have been permanently moved to the given URI indicated in this response.

302

Found

The requested resource was temporarily moved.

303

See Other

The response to the request can be found under a different URI.

The response to the request should be retrieved using a GET or POST method.

304

Not Modified

The requested resource has not been modified. In such case, there is no need to retransmit the resource since the client still has a previously downloaded copy.

305

Use Proxy

The requested resource must be accessed through a proxy.

306

Unused

This HTTP status code is no longer used.

400

BadRequest

Invalid request.

The client should modify the request instead of re-initiating it.

401

Unauthorized

The authorization information provided by the client is incorrect or invalid.

402

Payment Required

Reserved request.

403

Forbidden

Request rejected.

The server has received the request and understood it, but refuses to respond to it. The client should not repeat the request without modifications.

404

NotFound

The requested resource cannot be found.

The client should modify the request instead of re-initiating it.

405

MethodNotAllowed

A request method is not supported for the requested resource.

The client should modify the request instead of re-initiating it.

406

Not Acceptable

The server could not fulfil the request according to the content characteristics of the request.

407

Proxy Authentication Required

This code is similar to 401, but indicates that the client must first authenticate itself with the proxy.

408

Request Time-out

The client does not produce a request within the time that the server was prepared to wait.

The client may re-initiate the request without modifications at any time later.

409

Conflict

The request cannot be processed due to a conflict.

The resource that the client attempts to create already exists, or the update request fails to be processed due to a conflict.

410

Gone

The requested resource cannot be found.

This status code indicates that the requested resource has been deleted permanently.

411

Length Required

The server refuses to process the request without a defined Content-Length.

412

Precondition Failed

The server does not meet one of the preconditions that the requester puts on the request.

413

Request Entity Too Large

The server refuses to process a request because the request is too large. The server may disable the connection to prevent the client from sending requests consecutively. If the server temporarily cannot process the request, the response will contain a Retry-After header field.

414

Request-URI Too Large

The request URI is too long for the server to process.

415

Unsupported Media Type

The server does not support the media type in the request.

416

Requested range not satisfiable

The requested range is invalid.

417

Expectation Failed

The server fails to meet the requirements of the Expect request header field.

422

UnprocessableEntity

The request is well-formed but is unable to respond due to semantic errors.

429

TooManyRequests

The client sends too many requests to the server within a given time, exceeding the client's access frequency limit or beyond the server's processing capability. In this case, the client should retry after the time period specified in the Retry-After response header.

500

InternalServerError

The server is able to receive the request but it cannot understand the request.

501

Not Implemented

The server does not support the requested function.

502

Bad Gateway

The server is acting as a gateway or proxy and receives an invalid request from a remote server.

503

ServiceUnavailable

The requested service is invalid.

The client should modify the request instead of re-initiating it.

504

ServerTimeout

The server could not return a timely response. This status code is returned to the client only when the Timeout parameter is specified in the request.

505

HTTP Version not supported

The server does not support the HTTP protocol version used in the request.