Is there any function call or simple way to delete first N bytes from a text file in golang? Assuming that the file is contentiously appended by various go-routines, simultaneously I want to delete first N bytes of file.
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- duanqi6274 2017-06-22 21:15关注
You need to do
f.Seek
to jump over first bytes and than do regular reading, see example:package main import ( "fmt" "io" "io/ioutil" "os" ) func main() { f, err := os.Open(os.Args[1]) // open file from argument if err != nil { fmt.Println(err) return } var skipBytes int64 = 5 // how many bytes to skip _, err = f.Seek(skipBytes, io.SeekStart) // skipping first bytes if err != nil { fmt.Println(err) return } buffer := make([]byte, 1024) // allocating buffer to read for { n, err := f.Read(buffer) // reading fmt.Print(string(buffer[:n])) // writing to console if err != nil { fmt.Printf("Err: %v ", err) return } } }
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