Extract the contents of the INI file using read file mode

Content of the test.ini file

[aa]
a1=11
a2=22
[bb]
b1=33
b2=44

package main
import (
  "bufio"
  "fmt"
  "os"
  "strings"
)
func main() {
  fmt.Println(readFileIni("bb", "b2"))
}
func readFileIni(master, detail string) string {
  var result string = ""
  file, err := os.Open("test.ini")
  if err != nil {
  fmt.Println(err)
  }
  defer file.Close()
  var sectionName string
  reader := bufio.NewScanner(file)
  for reader.Scan() {
  linestr := reader.Text()
  strings.TrimSpace(linestr)
  if linestr == "" {
    continue
  }
  if linestr[0] == ';' {
    continue
  }
  if string(linestr[0]) == "[" && string(linestr[len(linestr)-1]) == "]" {
    sectionName = linestr[1 : len(linestr)-1]
  } else if sectionName == master {
    pair := strings.Split(linestr, "=")
    if len(pair) == 2 {
    key := strings.TrimSpace(pair[0])
    if key == detail {
      result = pair[1]
    }
    }
  }
  }
  return result
}

First, open the INI file, and then read the file line by line. Remove the space, comment and blank line of each line, and extract the data starting with [and ending with] to give sectionName. If you need to obtain the same name as sectionName, you can continue to obtain the sub-configuration. The subconfiguration divides keys and values according to =.