One of requests: HTTP request Status Code

1. There are several main methods of request:

Verb	Description
HEAD	Gets only the header information of a resource, metadata. For example, just want to know the size of a file, the modification date of a resource, etc.
GET	Get resources, one or more
POST	Create a resource
PATCH	Updates a partial property of a resource. Update resources on the server (client provides changed properties)
PUT	Replace the resource, and the client needs to provide all the properties of the new resource. If the new content is empty, set to Content-Length 0 to differentiate the error message
DELETE	Delete a resource

Where get POST is more commonly used for focus needs to be mastered.

2. Status Code

HTTP status Code classification

category	Category Description
1**	Information, the server receives the request and requires the requestor to continue the operation
2**	Successful, the operation is successfully received and processed
3**	Redirect, requires further action to complete the request
4**	Client error, request contains syntax error or cannot complete request
5**	Server error, the server has an error while processing the request

For more details, refer to the following links:

Http://www.runoob.com/http/http-status-codes.html

One of requests: HTTP request Status Code