golang 读取切分存储byte流文件
package main
import (
"fmt"
"os"
"time"
)
func check(e error) {
if e != nil {
panic(e)
}
}
func cat(f *os.File) []byte {
var payload []byte
for {
buf := make([]byte, 1024)
switch nr, err := f.Read(buf[:]); true {
case nr < 0:
fmt.Fprintf(os.Stderr, "cat: error reading: %s\n", err.Error())
os.Exit(1)
case nr == 0: // EOF
return payload
case nr > 0:
payload = append(payload, buf...)
}
}
}
func main() {
file, err := os.Open("test.flv")
if err != nil {
panic(err)
}
defer file.Close()
fmt.Println(file)
payload := cat(file)
fo, errs := os.Create(fmt.Sprintf("./%d.bmp", time.Now().UnixNano())) //time.Now().UnixNano()
check(errs)
_, errs = fo.Write(payload)
}