http response status code

received but processing

• 100
  

  The server received the request, the client needs to continue sending request. The server will return a final response.

• 101
  

  The server has understood the request but it shows that the request should be processed by another protocol.

• 102
  

  It means the request had been received and continue to process it.

• 200
  

  Request successfully and the response is returned.

• 201
  

  Request has been realized but there is a new URI need to be create so please wait.

• 202
  

  Request success but the request is not being processed now. It means that the request can be refused or accepted.

• 204
  

  Request success.

  The Response contains new meta info but no message body.

Redirect

• 300
  

  Redirect

• 301
  

  Permanently redirect

• 302
  

  Temporarily redirect

Error of the client.

• 400
  

  Request parameters error or wrong syntax.

• 401
  

  Authentication needed.

• 403
  

  Forbbiden

• 404
  

  Not found

Error of The server

• 500
  

  Inner server error

• 501
  

  Server can’t identify request

• 502
  

  Invalid response

• 503
  

  Server can’t process the request now because of maintaining, overloading and so on.