Updated on 2024-05-09 GMT+08:00

Status Codes

The following table lists HTTP response status codes.

Table 1 HTTP response status codes

Status Code

Message

Description

100

Continue

Continue sending requests.

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

101

Switching Protocols

The protocol is switched. The target protocol must be more advanced than the original one.

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

201

Created

The request for creating resources has been fulfilled.

202

Accepted

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

203

Non-Authoritative Information

The request was successful but the response has been modified by a transforming proxy.

204

No Content

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

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

205

Reset Content

The server has fulfilled the request and requires the client to reset the content.

206

Partial Content

The server has fulfilled a range GET request.

300

Multiple Choices

There are multiple options for the requested resource. The response contains a list of resource characteristics and addresses from which the user or user agent (such as a browser) can choose the most appropriate one.

301

Moved Permanently

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

302

Found

The requested resource resides temporarily under a different URI.

303

See Other

The server is redirecting the client to a different address.

The client should use a GET or POST method to obtain the resource.

304

Not Modified

The requested resource has not been modified. When the server returns this status code, no resource is returned.

305

Use Proxy

The requested resource is available only through a proxy.

306

Unused

This HTTP status code is no longer used.

400

Bad Request

Invalid request.

The client should not repeat this request without modification.

401

Unauthorized

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

402

Payment Required

This status code is reserved for future use.

403

Forbidden

The request has been rejected.

The server received and understood the request but refused to fulfill it, because the request is set to deny access. The client should not repeat this request without modification.

404

Not Found

The requested resource could not be found.

The client should not repeat this request without modification.

405

Method Not Allowed

The method specified in the request is not allowed for the requested resource.

The client should not repeat this request without modification.

406

Not Acceptable

The server cannot implement the request based on the content characteristics of the request.

407

Proxy Authentication Required

This status code is similar to 401, but the client must be authenticated using a 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 repeat 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 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 fails to process the request which does not contain the Content-Length header field.

412

Precondition Failed

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

413

Request Entity Too Large

The request is larger than that the server can process. The server may close the connection to prevent the client from continuously sending the request. If the server cannot process the request temporarily, 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 cannot process the media format 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

Unprocessable Entity

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

429

Too Many Requests

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

Internal Server Error

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

501

Not Implemented

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

502

Bad Gateway

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

503

Service Unavailable

The requested service is invalid.

The client should not repeat this request without modification.

504

Server Timeout

The request cannot be fulfilled within a given amount of time. The response will reach the client only if the request carries a timeout parameter.

505

HTTP Version Not Supported

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