#!/usr/bin/env ruby
# send_png_mail.rb
#
# Usage:
# send_png_mail.rb [from=addr] [to=addr] [subject=text] file1.png [...]
#
# Sends PNG files by a multipart/mixed mail
require 'base64'
require 'securerandom'
user=`whoami`.strip
from=user
to=user
subject=nil
png_files=[]
ARGV.each do |arg|
case arg
when /\Afrom=(.+)\z/
from=Regexp.last_match(1)
when /\Ato=(.+)\z/
to=Regexp.last_match(1)
when /\Asubject=(.+)\z/
subject=Regexp.last_match(1)
else
png_files.push(arg)
end
end
abort("no png file given") if png_files.empty?
unless subject
subject = File.basename(png_files.first)
end
boundary="----=_Part_#{SecureRandom.hex(16)}"
altbound="----=_Part_#{SecureRandom.hex(16)}"
mail=[]
mail << "From: #{from}"
mail << "To: #{to}"
mail << "Subject: #{subject}"
mail << "MIME-Version: 1.0"
mail << "Content-Type: multipart/mixed; boundary=\"#{boundary}\""
mail << ""
mail << "--#{boundary}"
mail << "Content-Type: multipart/alternative; boundary=\"#{altbound}\""
mail << ""
mail << "--#{altbound}"
mail << "Content-Type: text/plain; charset=UTF-8"
mail << "Content-Transfer-Encoding: 7bit"
mail << ""
mail << "Please find attched files:"
png_files.each do |f|
mail << "* #{File.basename(f)}"
end
mail << ""
mail << "--#{altbound}"
mail << "Content-Type: text/html; charset=UTF-8"
mail << "Content-Transfer-Encoding: 7bit"
mail << ""
mail << "PNG sender"
mail << "Please find attched files:
"
png_files.size.times do |i|
mail << "![\"#{File.basename(png_files[i])}\"](\"cid:image#{i}\")
"
end
mail << ""
mail << ""
mail << "--#{altbound}--"
cidno=0
png_files.each do |file|
filename = File.basename(file)
encoded = Base64.encode64(File.binread(file))
mail << "--#{boundary}"
mail << "Content-Type: image/png; name=\"#{filename}\""
mail << "Content-Transfer-Encoding: base64"
mail << "Content-Disposition: inline; filename=\"#{filename}\""
mail << "Content-ID: "
mail << "X-Attachment-Id: image#{cidno}"
mail << ""
mail << encoded
mail << ""
cidno=cidno.succ
end
mail << "--#{boundary}--"
IO.popen("/usr/lib/sendmail -t", "w") do |sendmail|
sendmail.write(mail.join("\r\n"))
end