# Important! Web Server response including newline
printf "%s\r\n" "Content-Type: text/html; charset=utf-8" ""
# Important! Web Server response including newline
printf "%s\r\n" "Content-Type: text/html; charset=utf-8" ""
<button type=submit name=action value=update>Update</button>
<button type=submit name=action value=cancel>Cancel</button>
</form></main>
<button type=submit name=action value=update>Update</button>
<button type=submit name=action value=cancel>Cancel</button>
</form></main>