Status Codes

Table 1 describes status codes.

Table 1 Status codes

Status Code

Message

Description

100

Continue

The client should continue with its request.

This interim response is used to inform the client that part of the request has been received and has not yet been rejected by the server.

101

Switching Protocols

The protocol should be switched. The protocol can only be switched to a newer protocol.

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

200

Success

The request has been fulfilled. This indicates that the server has provided the requested web page.

201

Created

The request is successful and the server has created a new resource.

202

Accepted

The request has been accepted, but the processing has not been completed.

203

Non-Authoritative Information

Unauthorized information. The request is successful.

204

NoContent

The server has successfully processed the request, but does not return any content.

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

205

Reset Content

The server has successfully processed the request, but does not return any content.

206

Partial Content

The server has successfully processed the partial GET request.

300

Multiple Choices

There are multiple options for the location of the requested resource. 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

The requested resource has been assigned a new permanent URI, and the new URI is contained in the response.

302

Found

The requested resource resides temporarily under a different URI.

303

See Other

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

and should be retrieved using a GET or POST method.

304

Not Modified

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

305

Use Proxy

The requested resource is available only through a proxy.

306

Unused

The HTTP status code is no longer used.

400

BadRequest

Invalid request.

The client should not repeat the request without modifications.

401

Unauthorized

This status code is returned after the client provides the authentication information, indicating that the authentication information is incorrect or invalid.

402

Payment Required

This status code is reserved for future use.

403

Forbidden

The server has received the request and understood it, but the server is refusing to respond to it.

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

404

NotFound

The requested resource cannot be found.

The client should not repeat the request without modifications.

405

MethodNotAllowed

A request method is not supported for the requested resource.

The client should not repeat the request without modifications.

406

Not Acceptable

The server could not fulfill 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 server has timed out waiting for the request.

The client may repeat the request without modifications at any time later.

409

Conflict

The request could not be processed due to a conflict in the request.

This status code indicates that the resource that the client is attempting to create already exists, or that the request has failed to be processed because of the update of the conflict request.

410

Gone

The requested resource cannot be found.

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

411

Length Required

The server is refusing 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 is refusing to process a request because the request entity is too large for the server to process. The server may disable the connection to prevent the client from sending requests consecutively. If the server is only temporarily unable to 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 has failed to meet the requirements of the Expect request-header field.

422

UnprocessableEntity

The request was well-formed but was unable to be followed due to semantic errors.

429

TooManyRequests

The client sends excessive requests to the server within a given time (exceeding the limit on the access frequency of the client), or the server receives excessive requests within a given time (beyond its processing capability). In this case, the client should resend the request after the time specified in the Retry-After header of the response has elapsed.

500

InternalServerError

The server is able to receive the request but unable to understand it.

501

Not Implemented

The server does not support the requested function.

502

Bad Gateway

The server was acting as a gateway or proxy and received an invalid request from the remote server.

503

ServiceUnavailable

The requested service is invalid.

The client should not repeat the request without modifications.

504

ServerTimeout

The request cannot be fulfilled within a given time. 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.