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Editor to share with you about the HTTP protocol problems, I believe that most people do not know much, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

1. What are the main features of the HTTP protocol class?

Simple and fast: refers to each resource character UII, which is fixed, uniform resource character,

Flexibility: the header has data types, and different data types can be transmitted through an http protocol.

No connection: the connection is broken at once.

Stateless: the client and the server are two identities, and the identity of the two connectors cannot be distinguished.

2. What are the components of the message?

Request message:

The request line contains: http method, page address, http protocol, version

Request header: key&value value to tell the server what I want

Blank line

Request body

Response message:

Status line, response header, blank line, response body

3. What are the methods in the HTTP protocol class?

GET--- acquires resources

POST--- transport resources

PUT--- update resources

DELETE--- Delete Resources

HEAD--- gets the first part of the message

4. The difference between post and get

5. What are the HTTP status codes?

1xx: prompt message-indicates that the request has been received. Continue processing.

2xx: successful-indicates that the request has been successfully received

3xx: redirect-- further operations must be taken to complete the request

4xx: client error-request has syntax error or request cannot be implemented

5xx: server error-the server failed to fulfill a legitimate request

200 OK: client request succeeded

206PARTIAL CONTENT: the client sends a GET request with a range header, and the server completes it. Range means scope.

301 moved permanently: the requested page has been transferred to the new url (permanent redirect)

FOUND: the requested page has been temporarily transferred to the new URL (temporary redirect)

NO MODIFIED: the client makes a conditional request for the buffered document, and the server tells the client that the previously buffered document can continue to be used (cached)

6. What is persistent link

Version 1.1 supports persistent links, but not 1.0

7. What is pipelining

Pipelining must be through persistent connections and must be supported by http version 1.1 or above

Only get and head requests can be pipelined, and POST is limited

The pipeline mechanism should not be activated when creating a connection for the first time, because the server does not necessarily support the http1.1 version protocol

These are all the contents of this article entitled "what are the questions about HTTP protocol classes?" Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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