List of Common HTTP Error Messages

404 Error

When a browser request for a page from server, an error might occur.
This is the list of HTML message returning.

1xx Informational

Code
Information
Description
100
Continue

101
Switching Protocols

102
Processing (WebDAV; RFC 2518)



2xx Success

Code
Information
Description
200
OK
Action completed successfully
201
Created
Success following a POST command
202
Accepted
The request has been accepted for processing, but the processing has not been completed.
203
Non-Authoritative Information (since HTTP/1.1)
Response to a GET command, indicates that the returned meta information is from a private overlaid web.
204
No Content
Server has received the request but there is no information to send back.
205
Reset Content

206
Partial Content
The requested file was partially sent.   Usually caused by stopping or refreshing a web page.

3xx Redirection


Code
Information
Description
300
Multiple Choices

301
Moved Permanently
Requested a directory instead of a specific file.   The web server added the filename index.html, index.htm, home.html, or home.htm to the URL.
302
Found

303
See Other (since HTTP/1.1)

304
Not Modified
The cached version of the requested file is the same as the file to be sent.
305
Use Proxy (since HTTP/1.1)

           

4xx Client Error

Code
Information
Description
400
Bad Request
The request cannot be fulfilled due to bad syntax
401
Unauthorized
The request was a legal request, but the server is refusing to respond to it. For use when authentication is possible but has failed or not yet been provided
402
Payment Required
Reserved for future use
403
Forbidden
The request was a legal request, but the server is refusing to respond to it
404
Not Found
The requested page could not be found but may be available again in the future
405
Method Not Allowed
A request was made of a page using a request method not supported by that page
406
Not Acceptable
The server can only generate a response that is not accepted by the client
407
Proxy Authentication Required
The client must first authenticate itself with the proxy
408
Request Timeout
The server timed out waiting for the request
409
Conflict
The request could not be completed because of a conflict in the request
410
Gone
The requested page is no longer available
411
Length Required
The "Content-Length" is not defined. The server will not accept the request without it
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 too large

5xx: Server Error

Code
Information
Description
500
Internal Server Error
A generic error message, given when an unexpected condition was encountered and no more specific message is suitable.
501
Not Implemented
The server either does not recognize the request method, or it lacks the ability to fulfil the request. Usually this implies future availability (e.g., a new feature of a web-service API).
502
Bad Gateway
The server was acting as a gateway or proxy and received an invalid response from the upstream server.
503
Service Unavailable
The server is currently unavailable (because it is overloaded or down for maintenance). Generally, this is a temporary state.
504
Gateway Timeout
The server was acting as a gateway or proxy and did not receive a timely response from the upstream server.
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



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