AJAX - The Complete Reference

PART IV

Appendix B: HTTP 1.1 Reference 601

4XX Codes

Status Code Reason String Description

413 Request Entity Too

Large

Indicates that the server is refusing to return data because

the object might be too large or the server might be too

loaded to handle the request. The server also might provide

information indicating when to try again, if possible, but

just as well might terminate any open connections.

414 Request-URI Too Large Indicates that the Uniform Resource Identifier (URI),

generally a URL, in the request field is too long for

the server to handle. This is unlikely to occur as many

browsers probably will not allow such excessive requests

to be transmitted.

415 Unsupported Media

Type

Indicates the server will not perform the request because

the media type specified in the message is not supported.

This code might be returned when a server receives a file

that it is not configured to accept using the PUT method.

5XX Codes

Status Code Reason String Description

500 Internal Server Error A serious error message indicating that the server

encountered an internal error that keeps it from fulfilling

the request.

501 Not Implemented Indicates that the server does not support or might be

understood but not implemented. This is used when an

unsupported method is requested.

502 Bad Gateway Indicates that the server acting as a proxy encountered

an error from some other gateway and is passing the

message along.

503 Service Unavailable Indicates the server currently is overloaded or is

undergoing maintenance. Headers can be sent to indicate

when the server will be available.

504 Gateway Time-out Indicates that the server, when acting as a gateway or

proxy, encountered too long a delay from an upstream

proxy and decided to time out.

505 HTTP Version Not

Supported

Indicates that the server does not support the HTTP

version specified in the request.

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