code: func ConvertRTF(r io.Reader) (string, map[string]string, error) {
  	f, err := NewLocalFile(r, "/tmp", "sajari-convert-")
  	if err != nil {
  		return "", nil, fmt.Errorf("error creating local file: %v", err)
  	}
  	defer f.Done()
  
  	var output string
  	tmpOutput, err := exec.Command("unrtf", "--nopict", "--text", f.Name()).Output()
  	if err != nil {
  		return "", nil, fmt.Errorf("unrtf error: %v", err)
  	}
  
  	// Step through content looking for meta data and stripping out comments
  	meta := make(map[string]string)
  	for _, line := range strings.Split(string(tmpOutput), "\n") {
  		if parts := strings.SplitN(line, ":", 2); len(parts) > 1 {
  			meta[strings.TrimSpace(parts[0])] = strings.TrimSpace(parts[1])
  		}
  		if len(line) > 4 && line[:4] != "### " {
  			output += line + "\n"
  		}
  	}
  
  	// Identify meta data
  	if tmp, ok := meta["AUTHOR"]; ok {
  		meta["Author"] = tmp
  	}
  	if tmp, ok := meta["### creation date"]; ok {
  		if t, err := time.Parse("02 January 2006 15:04", tmp); err == nil {
  			meta["CreatedDate"] = fmt.Sprintf("%d", t.Unix())
  		}
  	}
  	if tmp, ok := meta["### revision date"]; ok {
  		if t, err := time.Parse("02 January 2006 15:04", tmp); err == nil {
  			meta["ModifiedDate"] = fmt.Sprintf("%d", t.Unix())
  		}
  	}
  
  	return output, meta, nil
  }
docs: // ConvertRTF converts RTF files to text.