Ruby Image Requests

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# include MD5 gem, should be part of standard ruby install
require 'digest/md5'

# get the email from URL-parameters or what have you and make lowercase
email_address = params[:email].downcase

# create the md5 hash
hash = Digest::MD5.hexdigest(email_address)

# compile URL which can be used in <img src="RIGHT_HERE"...
image_src = "https://www.gravatar.com/avatar/#{hash}"

Ruby Gem

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