从第一个CRLF到末尾读取[]个字节

Question

in golang, having a []byte (resulting from ioutil.ReadAll), i should need to read from the first newline CRLF until the end of the block.

could you point me some examples?

Answer 1

This is can be done easily using the bytes.Index function, which returns the index of a given sub-slice of bytes in another byte slice:

func afterCRLF(data []byte) []byte {
    crlf := []byte("
")
    index := bytes.Index(data, crlf)
    if index == -1 {
        return nil
    }
    return data[index+len(crlf):]
}

Note: the above function does not include the first CRLF in the returned byte slice. Remove +len(crlf) if you need those two characters included.

Example: https://play.golang.org/p/WdylrkPwU_