AJAX - The Complete Reference

PART IV

Appendix B: HTTP 1.1 Reference 599

2XX Codes

Status Code Reason String Description

205 Reset Content Indicates that the client should reset the page that sent

the request (potentially for more input). This could be

used on a form page that needs consistent refreshing

rather than reloading, as might be used in a chat system.

206 Partial Content Indicates a successful request for a piece of a larger

document or set of documents. This response typically is

encountered when media is sent out in a particular order,

or byte-served, as with streaming Acrobat files.

3XX Codes

Status Code Reason String Description

300 Multiple Choices Indicates that there are many possible representations for

the requested information, so the client should use the

preferred representation, which might be in the form of a

closer server or different data format.

301 Moved Permanently Requested resource has been assigned a new permanent

address, and any future references to this resource

should be made using one of the returned addresses.

302 Moved Temporarily Requested resource temporarily resides at a different

address. For future requests, the original address should

still be used.

303 See Other Indicates that the requested object can be found at a

different address and should be retrieved using a GET

method on that resource.

304 Not Modified Issued in response to a conditional GET; indicates to the

agent to use a local copy from cache or similar action as

the request object has not changed.

305 Use Proxy Indicates that the requested resource must be accessed

through the proxy given by the URL in the Location

header.

4XX Codes

Status Code Reason String Description

400 Bad Request Indicates that the request could not be understood by the

server due to malformed syntax.

401 Unauthorized Request requires user authentication. The authorization

has failed for some reason, so this code is returned.

402 Payment Required Obviously in support of e-commerce, this code is currently

not well-defined.

TABLE B-7 HTTP 1.1 Response Codes and Reason Strings (continued)