Status Codes

100

Continue

The client should proceed with 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

The protocol should be switched. The protocol can only be switched to a later version.

For example, switch the current HTTP protocol to the latest version.

200

OK

The request has been fulfilled.

201

Created

The request for creating a resource has been fulfilled.

202

Accepted

The request has been accepted but is still being processed.

203

Non-Authoritative Information

Non-authoritative information. The request is successful.

204

NoContent

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, but the client is required to reset the content.

206

Partial Content

The server has processed a part of the 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 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.

It should be retrieved using a GET or POST method.

304

Not Modified

The requested resource has not been modified. When the server returns this status code, it does not return any resources.

305

Use Proxy

The requested resource must be accessed through a proxy.

306

Unused

The HTTP status code is no longer used.

400

BadRequest

The request is invalid.

Modify the request and then try again.

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 request is reserved.

403

Forbidden

The request has been rejected.

The server has received and understood the request; yet it refused to respond, because the request is set to deny access. Do not retry the request before modification.

404

NotFound

The requested resource cannot be found.

Modify the request and then try again.

405

MethodNotAllowed

The request contains one or more methods not supported for the resource.

Modify the request and then try again.

406

Not Acceptable

The server cannot implement 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 request timed out.

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

409

Conflict

The request cannot be processed due to a conflict.

This status code indicates that the resource that the client attempts to create already exits, or the requested update failed due to a conflict.

410

Gone

The requested resource is no longer available.

The 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 requirements that the requester puts on the request.

413

Request Entity Too Large

The request is larger than that a server can process. The server may disconnect 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 media format in the request is not supported.

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 process 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 but unable to understand the request.

501

Not Implemented

The server does not support the requested function, and therefore cannot implement the request.

502

Bad Gateway

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

503

ServiceUnavailable

The requested service is invalid.

Modify the request and then try again.

504

ServerTimeout

The server cannot 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.