go 获取文件类型

package main
 
import (
	"flag"
	"log"
	"os"
 
	"github.com/rakyll/magicmime"
)
 
func main() {
	var (
		path string
	)
	flag.StringVar(&path, "file", "", "文件名")
	flag.Parse()
	if err := magicmime.Open(magicmime.MAGIC_MIME_TYPE | magicmime.MAGIC_SYMLINK | magicmime.MAGIC_ERROR); err != nil {
		log.Fatal(err)
	}
	defer magicmime.Close()
 
	buf := make([]byte, 64)
	f, err := os.Open(path)
	f.Read(buf)
	mimetype, err := magicmime.TypeByBuffer(buf)
	if err != nil {
		log.Fatalf("error occured during type lookup: %v", err)
	}
 
	log.Printf("mime-type: %v", mimetype)
}

先安装依赖sudo apt-get install libmagic-dev

编译后，运行：

perl脚本

# ./main -file ./test.pl
2022/08/03 11:36:41 mime-type: text/x-perl
可执行文件：

./main -file ./main
2022/08/03 11:36:24 mime-type: application/x-executable