global

def doi_fetch_and_convert(doi, fuzzy: false, verbose: false, site: "https://dx.doi.org")
  doipath = doi.sub(/^([0-9.]+)_/) {"#$1/"} # convert initial _ back to /
  # warn "** SUB #{doi} #{doipath}" if doi != doipath
  begin
    cite = JSON.parse(URI("#{site}/#{doipath}").open(ACCEPT_CITE_JSON).read)
    puts cite.to_yaml if verbose
    doi_citeproc_to_lit(cite, fuzzy)
  rescue OpenURI::HTTPError => e
    begin
      site = "https://dl.acm.org"
      percent_escaped = doipath.gsub("/", "%2F")
      path = "#{site}/action/exportCiteProcCitation?targetFile=custom-bibtex&format=bibTex&dois=#{percent_escaped}"
      op = URI(path).open       # first get a cookie, ignore result
      # warn [:META, op.meta].inspect
      cook = op.meta['set-cookie'].split('; ', 2)[0]
      cite = JSON.parse(URI(path).open("Cookie" => cook).read)
      cite = cite["items"].first[doipath]
      puts cite.to_yaml if verbose
      doi_citeproc_to_lit(cite, fuzzy)
    rescue
      raise e
    end
  end
end