What are the common methods of http?

Commonly used http methods are: 1. Get method to obtain resources; 2. Post method to transmit entities; 3. Put method to transmit files; 4. Head method to obtain the header of the message; 5. Delete files. DELETE method and so on.

[Recommended course: http tutorial]

HTTP common methods:

(1) GET method: Obtain resources

The GET method is used to request the resource specified by the URL. The specified resource is parsed by the server and the response content is returned.

Example: Return the page resource of index.html

GET /index.html HTTP/1.1
Host: www.php.cn

(2) POST method: transfer entity theme

The POST method is used The body of the transmission entity

Example: Return the processing result of submit.cgi received data

POST /submit.cgi HTTP/1.1
Host:www.php.cn
Content-Length:1560

(3)PUT method: Transfer file

PUT method Used to transfer files. Like the file upload of the FTP protocol, the content of the file is required to be included in the request message body and then saved to the location specified by the request URL. Not commonly used.

Example: Response returns status code 204 No Content (for example: the html already exists on the server)

PUT /example.html HTTP/1.1
Host:www.php.cn
Content-Type: text/html
Content-Length: 1560

(4) HEAD method: Get the message header

The HEAD method is the same as the GET method, except that it does not return the main part of the message. Used to confirm the validity of the URL and the date and time of resource update, etc.

Example: Return the response header related to index.html

HEAD /index.html HTTP/1.1
Host:www.php.cn

(5) DELETE method: delete files

DELETE method is used to delete files, Is the opposite method of PUT. The DELETE method deletes the specified resource according to the request URL. Not commonly used either.

Example: Response returns status code 204 No Content (for example: the html has been deleted from the server)

DELETE /example.html HTTP/1.1
Host:www.php.cn

(6) OPTIONS method: Ask for supported methods

The OPTIONS method is used to query the methods supported by the resource specified in the request URL.

OPTIONS * HTTP/1.1
Host:www.php.cn

Response

HTTP/1.1 200 OK 
Allow:GET,POST,HEAD,OPTIONS

Summary: The above are the commonly used methods in http, I hope it will be helpful to everyone

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