Gman
A ruby gem to check if the owner of a given email address or website is working for THE MAN (a.k.a verifies government domains). It will also provide you with metadata about the domain, such as the country, state, city, or agency, where applicable. It does this by leveraging the power of Naughty or Nice, the Public Suffix List, and the associated Ruby Gem.
You could theoretically use regex, but either you’ll get a bunch of false positives, or your regex will be insanely complicated. gov.uk, may be valid, for example, but gov.fr is not (it’s gouv.fr, for what it’s worth). The solution? Use Public Suffix to verify that it’s a valid public domain, then maintain a crowd-sourced sub-list of known global government and military domains. It should cover all US and international, government and military domains for both email and website verification.
See a domains that’s missing or one that shouldn’t be there? We’d love you to contribute.
Installation
Gman is a Ruby gem, so you’ll need a little Ruby-fu to get it working. Simply
gem install gman
Or add this to your Gemfile before doing a bundle install:
gem 'gman'
Usage
In general
Verify email addresses
Gman.valid? "[email protected]" #=> true
Gman.valid? "[email protected]" #=> false
Verify domain
Gman.valid? "http://foo.bar.gov" #=> true
Gman.valid? "foo.bar.gov" #=> true
Gman.valid? "foo.gov" #=> true
Gman.valid? "foo.biz" #=> false
Determine the type of domain
domain = Gman.new "whitehouse.gov"
domain.type #=> :federal
domain.federal? #=> true
domain.state? #=> false
domain.city? #=> false
domain.county? #=> false
Get information about the domain’s geographic location (.gov and .us only)
domain = Gman.new "illinois.gov"
domain.state #=> "IL"
domain.city #=> "springfield"
Get information about a .gov domain’s owner
domain = Gman.new "whitehouse.gov"
domain.agency #=> "Executive Office of the President"
Get the ISO Country Code information represented by a government domain
domain = Gman.new "whitehouse.gov" #=> #<Gman domain="whitehouse.gov" valid=true>
domain.country.name #=> "United States"
domain.country.alpha2 #=> "US"
domain.country.alpha3 #=> "USA"
domain.country.currency #=> "USD"
domain.country.calling_code #=> "+1"
Check if a country is on the US Sanctions list
Gman.new("foo.gov.kp").sanctioned? #=> true
Command line
Getting information about a given domain
$ gman whitehouse.gov
Domain : whitehouse.gov
Valid government domain
Type : federal
Country : United States
State : DC
City : Washington
Agency : Executive Office of the President
The command line tool will accept any domain-like string (email, url, etc.)
$ gman [email protected]
Domain : illinois.gov
Valid government domain
Type : state
Country : United States
State : IL
City : Springfield
Filter
Filters newline-separated email addresses from stdin. Example usage:
$ gman_filter < path/to/list/of/addresses.txt
Contributing
Contributions welcome! Please see the contribution guidelines for code contributions or for details on how to add, update, or delete government domains.
Credits
Heavily inspired by swot. Thanks @leereilly!