How to remove binary content from the strings?

Question

I was trying to read ID3 tags from mp3 files using golang.
I get the results. But they also contain some binary content as my database viewer suggests.

Any way to remove that content in golang?

Answer 1

This is a current issue in id3-go: PR 8 fixes it for id3v1

But that isn't enough for id3v2, as show in this commit, which does have to trim those null characters. See the use of cutset := string(rune(0)), and of TrimRight(s string, cutset string), as in for instance strings.TrimRight(fd.Title(), cutset):

fd, err := id3.Open(path)
if err != nil {
    item.Title = f.Name()
} else {
    defer fd.Close()
    cutset := string(rune(0))
    title := strings.TrimRight(fd.Title(), cutset)
    author := strings.TrimRight(fd.Artist(), cutset)
    if len(title) > 0 {
        item.Title = title
    } else {
        item.Title = author
        if len(author) > 0 {
            item.Title += " - "
        }
        item.Title += strings.TrimRight(f.Name(), cutset)
    }
    item.Subtitle = author
    tcon := fd.Frame("TCON")
    if tcon != nil {
        item.Categories = append(item.Categories, Text{Value: strings.TrimRight(tcon.String(), cutset)})
    }
    item.PubDate = strings.TrimRight(formatYear(fd.Year()), cutset)