所以,我一直在研究这个域名正则表达式.到目前为止,它似乎通过SLD和TLD(使用可选的ccTLD)获取域名,但是TLD列表存在重复.这可以进一步重构吗？
params[:domain_name].downcase.strip.match(/^[a-z0-9\-]{2,63}
\.((a[cdefgilmnoqrstuwxz]|aero|arpa)|(b[abdefghijmnorstvwyz]|biz)|
(c[acdfghiklmnorsuvxyz]|cat|com|coop)|d[ejkmoz]|(e[ceghrstu]|edu)|f[ijkmor]|
(g[abdefghilmnpqrstuwy]|gov)|h[kmnrtu]|(i[delmnoqrst]|info|int)|
(j[emop]|jobs)|k[eghimnprwyz]|l[abcikrstuvy]|
(m[acdghklmnopqrstuvwxyz]|me|mil|mobi|museum)|(n[acefgilopruz]|name|net)|(om|org)|
(p[aefghklmnrstwy]|pro)|qa|r[eouw]|s[abcdeghijklmnortvyz]|
(t[cdfghjklmnoprtvwz]|travel)|u[agkmsyz]|v[aceginu]|w[fs]|y[etu]|z[amw])
(\.((a[cdefgilmnoqrstuwxz]|aero|arpa)|(b[abdefghijmnorstvwyz]|biz)|
(c[acdfghiklmnorsuvxyz]|cat|com|coop)|d[ejkmoz]|(e[ceghrstu]|edu)|f[ijkmor]|
(g[abdefghilmnpqrstuwy]|gov)|h[kmnrtu]|(i[delmnoqrst]|info|int)|
(j[emop]|jobs)|k[eghimnprwyz]|l[abcikrstuvy]|
m[acdghklmnopqrstuvwxyz]|mil|mobi|museum)|
(n[acefgilopruz]|name|net)|(om|org)|
(p[aefghklmnrstwy]|pro)|qa|r[eouw]|s[abcdeghijklmnortvyz]|
(t[cdfghjklmnoprtvwz]|travel)|u[agkmsyz]|v[aceginu]|w[fs]|y[etu]|z[amw]))?$/)