Status Code

100

Continue

The client should continue sending the request.

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

101

Switching Protocols

The requester has asked the server to switch protocols and the server has agreed to do so. The protocol should be switched only when it is advantageous to do so.

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

201

Created

The request has been fulfilled, resulting in the creation of a new resource.

202

Accepted

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

203

Non-Authoritative Information

The request has been fulfilled.

204

NoContent

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

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

205

Reset Content

The server successfully processed the request, but is not returning any content.

206

Partial Content

The server has fulfilled the partial GET request for the resource.

300

Multiple Choices

There are multiple options for the resource from which the client may choose. For example, this code could be used to present a list of resource characteristics and addresses from which the client, such as a browser, may choose.

301

Moved Permanently

This and all future requests should be permanently directed 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 another URI

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

The request could not be understood by the server due to malformed syntax.

The client should not repeat the request without modifications.

401

Unauthorized

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

402

Payment Required

Reserved for future use.

403

Forbidden

The request is rejected.

The client should not repeat the request without modifications.

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 cannot fulfill the request based on 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 any modification at any time.

409

Conflict

The request could not be completed due to a conflict with the current state of the resource.

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

410

Gone

The requested resource is no longer available.

The requested resource has been deleted permanently.

411

Length Required

The server refused to process the request because the request does not specify the length of its content.

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 larger than the server is willing or able to process. The server may close the connection to prevent the client from continuing the request. If the server temporarily cannot process the request, the response will contain a Retry-After header field.

414

Request-URI Too Large

The server is refusing to service the request because the request URI is longer than the server is willing to interpret.

415

Unsupported Media Type

The server is refusing to service the request because the entity of the request is in a format not supported by the requested resource for the requested method.

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 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 repeat requests after the time specified in the Retry-After header of the response expires.

500

InternalServerError

The server encountered an unexpected condition which prevented it from fulfilling the request.

501

Not Implemented

The server does not support the functionality required to fulfill the request.

502

Bad Gateway

The server acting as a gateway or proxy receives an invalid response from a remote server.

503

ServiceUnavailable

The requested service is unavailable.

The client should not repeat the request without modifications.

504

ServerTimeout

The request cannot be fulfilled within a given amount of 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.