HTTP for programming :HTTP Client

 

HTTP Version

• HTTP/0.9
• HTTP/1.0
• HTTP/1.1
• HTTP/2.0
• HTTP/3.0

Type of HTTP Request/Response

• Client request
• Server response

HTTP/1.1 request /response messages

• Request Syntax
• request line 
• Request methods OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT, PATCH
• Safe methods
• Idempotent methods
• Cacheable methods
• Request header fields
• Response Syntax
• Response status codes
• Response header fields

HTTP message headers are represented 

    Key: Value,

example HTTP message header:

{ 

  "content-length": "123",

  "content-type": "text/plain",

  "connection": "keep-alive",

  "host": "simple.com",

  "accept": "*/*" 

} 

Node HTTP standard module

1. built-in Fetch API
2. Axios
3. Got
4. superagent
5. node-fetch
6. Fetch API