This is a simple gem for Ruby that simplifies validating email addresses. It conforms with RFC2822.

Here comes a quick code sample. Currently no docs.

require 'rfc822'

# To test if whole string is an email... ugly way
#  (returns 0 on success, nil on failure):

"tom@example.com".dup.force_encoding("BINARY") =~ RFC822::EMAIL_REGEXP_WHOLE

# or nice one (returns true/false):

"tom@example.com".is_email?

# To test if string contains an email... ugly way
#   (returns 0 on success, nil on failure):

"demo john@example.comFooBar".dup.force_encoding("BINARY") =~ RFC822::EMAIL_REGEXP_PART

# or nice one (returns true/false):

"demo john@example.comFooBar".contains_email?

# To scan for emails within a string... ugly way
#   (returns an array):

"something a@example.com xyz".dup.force_encoding("BINARY").scan(RFC822::EMAIL_REGEXP_PART)

# or nice one (also returns an array):

"something a@example.com xyz".scan_for_emails

If you omit ‘.dup.force_encoding(“BINARY”)` part, you can run into exceptions if someone passes non-ASCII email (see github.com/mspanc/rfc822/issues/3).

Code was tested with ruby-1.8.7-p334 [ i386 ] and ruby-1.9.2-p180 [ i386 ] under RVM.

The gems are hosted at Rubygems.org. Make sure you’re using the latest version of rubygems:

$ gem update --system

Then you can install the gem as follows:

$ gem install rfc822

Add to your Gemfile:

gem "rfc822"

and then type:

bundle install

The source code is available at github.com/saepia/rfc822. You can either clone the git repository or download a tarball or zip file. Once you have the source, you can unpack it and use from wherever you downloaded.

• Fixed bug that caused to change encoding of string passed to the methods (thanks to Artur Trzop)

• Fixed regression introduced in 0.1.3 that caused EMAIL_REGEXP_WHOLE to stop working properly.

• security

  Updated regular expressions to use A and z instead of ^ and $ operators.

• Updated license

• Fixed description in the gem description

• Added compatibility with Ruby 1.9

• Added String#is_email?, String#contains_email? and String#scan_for_emails methods

• Initial release

MIT