31Jul
By: On: July 31, 2017 In: Latest News Comments: 0

In this blog post we are going to list the error codes and messages that might occur when a web browser makes a request to a web server.

1xx Informational

100 Continue

The request headers have been received by the server. The client should now proceed to send the request body.

101 Switching Protocols

The server is switching to as requested using an Upgrade request header by the client.

103 Checkpoint

Used in the resumable requests proposal aborted PUT or POST requests.

2xx Successful

200 OK

The request has succeeded.

201 Created

The request has been fulfilled and has resulted in one or more new resources being created.

202 Accepted

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

203 Non-Authoritative Information

The server successfully processed the request but is returning information that may be from another source.

204 No Content

The server has successfully fulfilled the request but is not returning any content.

205 Reset Content

The request has been successfully processed but it is not returning any content. Requires the requester to reset the document view.

206 Partial Content

The server is only producing part of the resource due to a range header sent by the client.

3xx Redirection

300 Multiple Choices

The request has more than one possible response. The user should choose one of them.

301 Moved Permanently

The requested page has moved to a new URL.

302 Found

The requested URL has temporarily moved to a new URL.

303 See Other

The requested page can be found under a different URL.

304 Not Modified

The page that has been requested had not been modified since it was last requested.

307 Temporary Redirect

The page has moved to a temporary URL.

308 Resume Incomplete

Used in resumable request proposal to resume an aborted POST or PUT request.

4xx Client Error

400 Bad Request

The server could not understand the request due to invalid syntax.

401 Unauthorised

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

403 Forbidden

The server understood the request but refuses to authorise it.

404 Not Found

The page requested could not be found.

405 Method Not Allowed

The request method is known by the sever but has been disabled and cannot be used.

406 Not Acceptable

The server can only generate a response that is not accepted by the client.

407 Proxy Authentication Required

The request has not been applied because it lacks valid authentication.

408 Request Timeout

The server has timed out waiting for a response.

409 Conflict

A request conflict with current state of server.

410 Gone

The requested page is no longer available.

411 Length Required

The server refuses to accept the request without a defined content-length header.

412 Precondition 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 to large.

414 Request-URI Too long

The URI requested by the client is longer than the server is willing to interpret.

415 Unsupported Media Type

The request has not been accepted by the server as the media type is not supported.

416 Requested Range Not Satisfiable

The client has asked for a portion of the file but the server cannot supply the portion.

417 Exception Failed

The expectation given in the requests Except header could not be met.

5xx Server Error

500 Internal Server Error

Generic error message given when something unexpected happens on the web server and the server can’t offer more specific information.

501 Not Implemented

The request method is not supported by the server and cannot be handled.

502 Bad Gateway

The server, while acting as a gateway or proxy, received an invalid response from the upstream sever.

503 Service Unavailable

The server is currently unavailable.

504 Gateway Timeout

The server did not receive a timely response from an upstream server it accessed to deal with your http request.

505 HTTP Version Not Supported

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

511 Network Authentication Required

The client needs to authenticate to gain network access.