RFC3986定義の厳密なURIの正規表現 (file) [a-z][-+.0-9a-z]*:(//(([-.0-9_a-z~]|%[0-9a-f][0-9a-f]|[!$&-,:;=])*@)?(\[(([0-9a-f]{1,4}:){6}([0-9a-f]{1,4}:[0-9a-f]{1,4}|(\d|[1-9]\d|1\d{2}|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d{2}|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d{2}|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d{2}|2[0-4]\d|25[0-5]))|::([0-9a-f]{1,4}:){5}([0-9a-f]{1,4}:[0-9a-f]{1,4}|(\d|[1-9]\d|1\d{2}|2[0-4]\d|25[0-5])\.(\d|[1-9]\