CODEWITHSUNDEEP
ruby-on-railsrubyrubygems
Apane101
Apane101

Reputation: 1123

Need to collect only emails using Ruby code

I've received a list of emails that I'd like to run an email campaign on, however, in the list there are some URL's... and it complicates things.

Here's the standard formatting of the email address, for example:

[email protected]

I'd like to paste the list in terminal and run a command to ONLY capture all of the email addresses and save them to a file and remove any URLS.

Please advise! It is much appreciated :)

Upvotes: 1

Views: 61

Answers (1)

earlonrails
earlonrails

Reputation: 5182

If you are just looking to catch most emails this regex might work. I got this regex from here How to validate an email address using a regular expression? They talk about the much more complicated RFC822 email regex

 #!/usr/bin/env ruby

input = $stdin.readlines # ctrl + D after paste
input.each do |f|
  puts f if f[/^[a-zA-Z0-9_.+\-]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-.]+$/]
end

# test input
# [email protected]
# www.cnn.com
# [email protected]
# [email protected]
# http://www.google.com

To write emails to a file:

 #!/usr/bin/env ruby

file = File.open("emails.txt", "w")
input = $stdin.readlines # ctrl + D after paste
input.each do |f|
  file.write(f) if f[/^[a-zA-Z0-9_.+\-]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-.]+$/]
end
file.close

Just to be clear, this is a ruby script which should be ran like this. Save the script as a file, ie email_parser.rb. 

chmod +x email_parser.rb
./email_parser.rb # this will wait for stdin, here you paste the list in to the terminal

When the terminal is hanging waiting, paste the list of emails in, then press ctrl + D to tell the program that this is the EOF. The program will then run through the list of emails/urls and parse. The output of this will be a file if using the updated script. The file will be in the same folder you ran the script and be called emails.txt

Upvotes: 1

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