gistfile1.go

rels := make(map[string]string)

link := header.Get("Link")
if len(link) == 0 {
  return rels
}

for _, l := range strings.Split(link, ",") {
  l = strings.TrimSpace(l)
  segments := strings.Split(l, ";")

  if len(segments) < 2 {
    continue
  }

  if !strings.HasPrefix(segments[0], "<") || !strings.HasSuffix(segments[0], ">") {
    continue
  }

  url, err := url.Parse(segments[0][1 : len(segments[0])-1])
  if err != nil {
    continue
  }

  for _, segment := range segments[1:] {
    switch strings.TrimSpace(segment) {
    case `rel="next"`:
      rels["next"] = link
    case `rel="prev"`:
      rels["prev"] = link
    case `rel="first"`:
      rels["first"] = link
    case `rel="last"`:
      rels["last"] = link
    }
  }
}