Method and status code of HTTP protocol

One: Format request for HTTP request information and response information: ( 1 Request Line (2) Request header information (3) Request principal information (can not) (4) The protocol request method used to request the path of a request method with a blank line between the header information and the principal information is 3 parts: GET POST put DELETE TRACE, protocol for options: currently HTTP/1.1  0.9,1. 0 is largely unused.

Second: The meaning of the Status code representation

The server cannot complete a clearly valid request.

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Status code	definition	Description
1XX	Information	Received request, continue processing
2XX	Success	Operation successfully received, understood and accepted
3XX	Redirect	In order to complete the request, further steps must be taken
4XX	Client error	Request syntax is either wrong or not fully satisfied.
5XX	Server-side error

200– server successfully returned to Web page

301/2-Permanent/Temporary redirection

304 Not modified– unmodified

Maintaining the original request data in 307 redirects

Failed status code:

404– The requested page does not exist

503– Server is temporarily unavailable

500– Server Internal Error

Method and status code of HTTP protocol