re = /https:\/\/(dev-|stag-|)(assets|images)\.server\.io\/v[\d]\/file\/(.*?)\/(?!(download$))/m
str = 'https://assets.server.io/v3/file/blt123e25b85f95497/download.jpg
https://images.server.io/v3/file/blt123e25b85f95497/download
https://images.server.io/v3/file/blt123e25b85f95497/random.jpg'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html