理解fmt||net/http in Go

• fmt

  Package fmt implements formatted I/O with functions analogous to C’s printf and scanf.

  The format ‘verbs’ are drived from C’s but are simpler.

• fmt.Println

  Println formats using the default formats for its operands and writes to standard output.

  Spaces are always added between operands and a newline is appended.

• net/http

  Package http provides HTTP client and server implementations.

  Get, Head, Post, and PostForm make HTTP (or HTTPs) requests:

  resp, err := http.Get("http://example.com")
  resp, err := http.Post("http://example.com/upload", "image/jpeg", &buf)
  resp, err := http.PostForm("http://example.com/form", url.Values{"key":{"Value"}, "id":{"123"}})
  

  The client must close the response body when finished with it:

  resp, err := http.Get("http://example.com/")
  if err != nil {
        
        
      // handle error
  }
  defer resp.Body.Close()
  body, err := ioutil.ReadAll
  

  《理解:=||nil||defer in Go》