Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I am using Mutt, and I have a message in my inbox with around ~1000 attachments, about 50% of which are .jpg files. I want to save all of those to a specified directory, leaving the other attachments alone.

Is it possible to do this easily with a few keystrokes or commands? Shift+T appears to allow for pattern-based tagging for messages, but not attachments.

share|improve this question

1 Answer 1

up vote 3 down vote accepted

You can tag (t) messages with attachments then send messages through a pipe (;|) program to extract attachments. I suggest you to set the following config in your .muttrc

set pipe_split = yes # sends tagged messages 1by1 otherwise they're concatenated with $pipe_sep
unset pipe_decode    # don't strip headers and eval mimes when piping

I wrote a really raw (WIP never finished but works...) ruby script to extract attachments. You can inspire yourself with it...

#!/usr/bin/env ruby
#
# scriptname : ~/bin/mutt_utils.rb
#
# Messages tagged
# To work with tagged message you have to :set pipe_split
# Otherwise only first message tagged will be processed.
#
require 'optparse'
require 'fileutils'
require 'mail'
#
# monkeypatch Mail::Message class to fix Invalid byte sequence with ruby 1.9
# https://github.com/mikel/mail/issues/340
# https://github.com/mreinsch/mail/commit/c7818a95f9f9fddc675f75452ea5000c46c30d94
#
if RUBY_VERSION >= "1.9.1"
  class Mail::Message
    def raw_source=(value)
      value.force_encoding("binary") if RUBY_VERSION >= "1.9.1"
      @raw_source = value.to_crlf
    end
  end
end

options = {}
OptionParser.new do |opts|
  opts.banner = "Usage: #{File.basename $0} [OPTIONS]"
  opts.on("-o", "--output PATH", "save in PATH folder") do |path|
    options[:output] = path
  end
  opts.on("-O", "--overwrite", "overwrite existing files") do |owr|
    options[:overwrite] = owr
  end
  opts.on("-n", "--name-regexp PATTERN", "save only attachment's name matching PATTERN") do |pat|
    options[:name_pattern] = pat
  end
  opts.on("-c", "--content-regexp PATTERN", "save only attachment's content_type matching PATTERN") do |pat|
    options[:content_pattern] = pat
  end
  opts.on("-v", "--verbose", "verbose") do |v|
    options[:verbose] = v
  end
  opts.on("-h", "--help", "usage") do
    puts opts
    exit
  end
end.parse!
puts "Options passed : #{options}" if options[:verbose]

if options[:output]
  unless File.directory?(options[:output])
    $stderr.puts "'#{options[:output]}' is not a valid folder !"
    exit
  end
end

def sanitize(value)
  value.gsub(/\s/, '_').gsub(/:/, '-').gsub(/\//, '-').gsub(/\\/, '-')
end

def check_criteria(criteria, pattern)
  return true if pattern.nil?
  criteria =~ /#{pattern}/i
end

data = ARGF.readlines.join
mail = Mail.read_from_string data #.force_encoding("UTF-8")
ts = mail.date.strftime("%Y-%m-%dT%H%M")
puts "Processing mail '#{mail.subject}' " if options[:verbose]
subject = mail.subject.nil? ? 'no subject' : mail.subject.downcase

mail.attachments.each do |att|
  puts "Attachment : filename=#{att.filename} content_type=#{att.content_type}" if options[:verbose]
  valid_name = check_criteria(att.filename, options[:name_pattern])
  valid_content = check_criteria(att.content_type, options[:content_pattern])
  unless valid_name
    puts "Filename doesn't match #{options[:name_pattern]}" if options[:verbose]
  end
  unless valid_content
    puts "Content doesn't match #{options[:content_pattern]}" if options[:verbose]
  end
  next unless ( valid_name && valid_content )
  fn = sanitize "#{ts}_#{subject}_#{att.filename}"
  fn = File.join(options[:output], fn) if options[:output]
  puts "Saving attachment to #{fn}." if options[:verbose]
  if (!options[:overwrite] && File.exist?(fn))
    $stderr.puts "'#{fn}' already exists ! Skipping." if options[:verbose]
    next
  end
  begin
    File.open(fn, 'wb') {|f| f.write att.body.decoded }
  rescue Exception => e
    $stderr.puts "Error while saving #{fn} ! Cause: #{e.message}"
  end
end

Don't forget to chmod +x ~/bin/mutt_utils.rb.

Usage sample: tag some messages with attachments, hit ; then |.

Enter at prompt ~/bin/mutt_utils.rb -o ~/Desktop/.

You should now find your attachments on your desktop.

share|improve this answer
    
for extracting only jpeg, use the -c or -n switch option. –  undx Jan 6 '13 at 14:14

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.