Rufous

    
    
      

HTTP Status Messages



HTML Error Messages
When a browser requests a service from a web server, an error might occur,
and the server might return an error code like "404 Not Found".
It is common to name these errors HTML error messages.
But these messages are something called HTTP status messages.
In fact, the server always returns a message for every request.
The most common message is 200 OK.

Below is a list of HTTP status messages that might be returned:

1xx: Information

  
    Message:
    Description:
  
  
    100 Continue
     The server has received the request headers, and the client should proceed to send the request body
  
  
    101 Switching Protocols
    The requester has asked the server to switch protocols
  
  
    103 Early Hints
    Used with the Link header to allow the browser to start preloading 
    resources while the server prepares a response
  


2xx: Successful

  
    Message:
    Description:
  
  
    200 OK
    The request is OK (this is the standard response for successful HTTP requests)
  
  
    201 Created
    The request has been fulfilled, and a new resource is
      created 
    
  
  
    202 Accepted
    The request has been accepted for processing, but the processing
      has not been completed
    
  
  
    203 Non-Authoritative Information
    The request has been successfully processed, but is returning information that may be from another source
  
  
    204 No Content
    The request has been successfully processed, but is not returning any content
  
  
    205 Reset Content
    The request has been successfully processed, but is not returning any content, and requires that the requester reset the document view
  
  
    206 Partial Content
    The server is delivering only part of the resource due to a range header sent by the client
  


3xx: Redirection

  
    Message:
    Description:
  
  
    300 Multiple Choices
    A link list. The user can select a link and go to that
      location. Maximum five addresses  
  
  
    301 Moved Permanently
    The requested page has moved to a new URL 
    
  
  
    302 Found
    The requested page has moved temporarily to a new URL 
    
  
  
    303 See Other
    The requested page can be found under a different URL
  
  
    304 Not Modified
    Indicates the requested page has not been modified since last requested
  
  
    307 Temporary Redirect
    The requested page has moved temporarily to a new URL
  
  
    308 Permanent Redirect
    The requested page has moved permanently to a new URL
  





4xx: Client Error

  
    Message:
    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 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 URI is
      too long. Occurs when you convert a POST request to a GET request with
      a long query information 
    
  
  
    415 Unsupported Media Type
    The server will not accept the request, because the media
      type is not supported 
    
  
  
    416 Range Not Satisfiable
    The client has asked for a portion of the file, but the server cannot supply that portion
  
  
    417 Expectation Failed
    The server cannot meet the requirements of the Expect request-header field
  


5xx: Server Error

  
    Message:
    Description:
  
  
    500 Internal Server Error
    A generic error message, given when no more specific message is suitable
  
  
    501 Not Implemented
    The server either does not recognize the request method, or it lacks the ability to fulfill the request
  
  
    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 (overloaded or down)
    
  
  
    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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