HTTP Status Codes

    When browser requests a service from web server, it will return some status code. I have listed all HTTP Status codes as below,

• 1xx -  Informational

100 - Continue - The server has received the request headers, and the client should proceed to send the request body

101 - Switching Protocols -  The Server switches protocol.

• 2xx - Successful 

 200 - OK      -  This is a successful HTTP request

201 - Created  -  Request is completed, new resource is created.

202 - Accepted -  The request is accepted for processing, but the processing is not complete.

203 - Non-Authoritative Information -  The information in the entity header is from a local or third party copy, not from the original server.

204 - No Content  -  A status code and a header are given in the response, but there is no entity-body in the reply.

205 - Reset Content - Browser will clear the form data.

206 - Partial Content - The server is delivering only part of the resource due to a range header sent by the client

•  3xx - Redirection

300 - Multiple Choices - A link list. The user can select a link and go to that location. Maximum five addresses  .

301 - Moved Permanently - Requested page permanently moved to new URL.

302 - Found - Requested page temporarily moved to new URL.

303 - See other - Requested page can be found some other URL.

304 - Not Modified - Requested has not modified.

305 - Use Proxy - The requested URL must be accessed through the proxy mentioned in the Location header.

306 - Unused - This code was used in a previous version. It is no longer used, but the code is reserved. 

307 - Temporary Redirection - The requested page has moved temporarily to a new URL

• 4xx - Client error

400 - Bad Request - The Request can not be fulfilled because of some bad syntax.

401 - Unauthorized - The request has not been applied because it lacks valid authentication credentials for the target resource.

402 - Payment Required - Now you can not use this code.

403 - Forbidden - The request is a legal request, but the server is refusing to respond to it due to some factor.

404 - Page Not Found - Requested page is not found.

405 - Method Not Allowed - Method specified in the request is not allowed

406 - Not Acceptable - Generated server response not accepts the client.

407 - Proxy Authentication Required - The client must first authenticate itself with the proxy 

408 - Request Timeout - The Server time out waiting for the request

409 - Conflict - The request could not be completed because of a conflict.

410 - Gone - The requested page is no longer available.

411 - Length Required - The server refuses to accept the request without a defined Content-Length.

412 - Pre condition failed - The precondition given in the request evaluated to false by the server 

413 - Request Entity too large - The server will not accept the request, because the request entity is  too large.

414 -  Request URI too long - The server will not accept the request, because the url is too long. Occurs when you convert a "post" request to a "get" request with a long query information .

415 -  Unsupported Media Type - If media type is not supported, it won't accept the request.

416 - Request range not satisfiable - The client has asked for a portion of the file, but the server cannot supply that portion

417 - Exception failed - The server cannot meet the requirements of the Expect request-header field

• 5xx - Server Error

500 - Internal Server Error - The request was not completed.  The server met an unexpected condition.

501 - Not Implemented - The server does not support the functionality required to fulfill the request. 

 502 - Bad Gateway - The server, while acting as a gateway or proxy, received an invalid response  from an inbound server it accessed while attempting to fulfill the request. 

503 - Service Unavailable - The server is currently unavailable

504 - Gateway Timeout - The server, while acting as a gateway or proxy, did not receive a timely response from an upstream server it needed to access in order to complete the request.

505 - HTTP Version not supported - The server does not support the HTTP protocol version used in the request.

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