パンくず
書籍 Regular Expressions Cookbook
Validating URLs
概要
URLのValidationについて
サンプル
subject = Array.new subject << "http://test.com" # => match subject << "https://test.cpm" # => match subject << "ftp://hoge" # => match subject << "file://hoge" # => match subject << "ntp://hoge" pattern = /\A(https?|ftp|file):\/\/.+/ subject.each_with_index {|each_subject,i|puts "#{i}:#{each_subject.scan(pattern)}"}
出力
0:[["http"]] 1:[["https"]] 2:[["ftp"]] 3:[["file"]] 4:[]
