Add handling for message reply via email
If the reply_email_domain configuration is set the messages plugin will use unique Reply-To addresses for every email. They contain enough information to reconstruct the message context and a hash to avoid user forgery and spam. A mail transfer agent must be configured to call the new rake task foodsoft:parse_reply_email for incoming mails. The rake task requires the receipt of the mail in the RECIPIENT variable and the raw message via standard input. An example invocation would look like: rake foodsoft:parse_reply_email RECIPIENT=f.1.1.HASH < test.eml
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@ -15,7 +15,9 @@ PATH
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remote: plugins/messages
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specs:
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foodsoft_messages (0.0.1)
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base32
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deface (~> 1.0.0)
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mail
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rails
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PATH
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@ -71,6 +73,7 @@ GEM
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addressable (2.4.0)
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arel (6.0.3)
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attribute_normalizer (1.2.0)
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base32 (0.3.2)
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better_errors (2.1.1)
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coderay (>= 1.0.0)
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erubis (>= 2.6.6)
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@ -534,3 +537,6 @@ DEPENDENCIES
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uglifier (>= 1.0.3)
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web-console (~> 2.0)
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whenever
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BUNDLED WITH
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1.10.6
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@ -116,6 +116,9 @@ default: &defaults
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# email address to be used as sender
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email_sender: foodsoft@foodcoop.test
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# domain to be used for reply emails
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#reply_email_domain: reply.foodcoop.test
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# If your foodcoop uses a mailing list instead of internal messaging system
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#mailing_list: list@example.org
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#mailing_list_subscribe: list-subscribe@example.org
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@ -0,0 +1,7 @@
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# This migration comes from foodsoft_messages_engine (originally 20160226000000)
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class AddEmailToMessage < ActiveRecord::Migration
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def change
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add_column :messages, :salt, :string
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add_column :messages, :received_email, :binary, :limit => 1.megabyte
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end
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end
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@ -188,6 +188,8 @@ ActiveRecord::Schema.define(version: 20160217194036) do
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t.datetime "created_at"
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t.integer "reply_to", limit: 4
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t.integer "group_id", limit: 4
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t.string "salt"
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t.binary "received_email"
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end
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create_table "order_articles", force: :cascade do |t|
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@ -80,6 +80,10 @@ class FoodsoftConfig
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setup_database
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end
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def select_multifoodcoop(foodcoop)
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select_foodcoop foodcoop if config[:multi_coop_install]
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end
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# Return configuration value for the currently selected foodcoop.
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#
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# First tries to read configuration from the database (cached),
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@ -134,16 +138,21 @@ class FoodsoftConfig
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keys.map(&:to_s).uniq
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end
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# @return [Array<String>] Valid names of foodcoops.
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def foodcoops
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if config[:multi_coop_install]
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APP_CONFIG.keys.reject { |coop| coop =~ /^(default|development|test|production)$/ }
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else
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config[:default_scope]
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end
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end
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# Loop through each foodcoop and executes the given block after setup config and database
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def each_coop
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if config[:multi_coop_install]
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APP_CONFIG.keys.reject { |coop| coop =~ /^(default|development|test|production)$/ }.each do |coop|
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select_foodcoop coop
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foodcoops.each do |coop|
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select_multifoodcoop coop
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yield coop
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end
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else
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yield config[:default_scope]
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end
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end
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# @return [Boolean] Whether this key may be set in the database
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@ -14,5 +14,9 @@ gem 'foodsoft_messages', path: 'lib/foodsoft_messages'
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This plugin introduces the foodcoop config option `use_messages`, which can be
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set to `false` to disable messages. May be useful in multicoop deployments.
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To allow members to respond to messages via email, see the config option
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`reply_email_domain` and the rake task `foodsoft:parse_reply_email`. We need to
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add some documentation on setting it up, though.
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This plugin is part of the foodsoft package and uses the GPL-3 license (see
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foodsoft's LICENSE for the full license text).
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@ -4,9 +4,17 @@ class MessagesMailer < Mailer
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set_foodcoop_scope
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@message = message
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reply_email_domain = FoodsoftConfig[:reply_email_domain]
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if reply_email_domain
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hash = message.mail_hash_for_user recipient
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reply_to = "Foodsoft <#{FoodsoftConfig.scope}.#{message.id}.#{recipient.id}.#{hash}@#{reply_email_domain}>"
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else
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reply_to = "#{show_user(message.sender)} <#{message.sender.email}>"
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end
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mail subject: "[#{FoodsoftConfig[:name]}] " + message.subject,
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to: recipient.email,
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from: "#{show_user(message.sender)} via Foodsoft <#{FoodsoftConfig[:email_sender]}>",
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reply_to: "#{show_user(message.sender)} <#{message.sender.email}>"
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reply_to: reply_to
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end
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end
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@ -1,3 +1,5 @@
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require "base32"
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class Message < ActiveRecord::Base
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belongs_to :sender, :class_name => "User", :foreign_key => "sender_id"
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belongs_to :group, :class_name => "Group", :foreign_key => "group_id"
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@ -23,6 +25,7 @@ class Message < ActiveRecord::Base
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validates_length_of :subject, :in => 1..255
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validates_inclusion_of :email_state, :in => EMAIL_STATE.values
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before_create :create_salt
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before_validation :clean_up_recipient_ids, :on => :create
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def self.deliver(message_id)
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@ -61,6 +64,16 @@ class Message < ActiveRecord::Base
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add_recipients([user])
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end
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def mail_hash_for_user(user)
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digest = Digest::SHA1.new
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digest.update self.id.to_s
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digest.update ":"
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digest.update salt
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digest.update ":"
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digest.update user.id.to_s
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Base32.encode digest.digest
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end
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# Returns true if this message is a system message, i.e. was sent automatically by Foodsoft itself.
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def system_message?
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self.sender_id.nil?
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@ -94,6 +107,10 @@ class Message < ActiveRecord::Base
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def is_readable_for?(user)
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!private || sender == user || recipients_ids.include?(user.id)
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end
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private
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def create_salt
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self.salt = [Array.new(6){rand(256).chr}.join].pack("m").chomp
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end
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end
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@ -0,0 +1,6 @@
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class AddEmailToMessage < ActiveRecord::Migration
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def change
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add_column :messages, :salt, :string
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add_column :messages, :received_email, :binary, :limit => 1.megabyte
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end
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end
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@ -17,7 +17,9 @@ Gem::Specification.new do |s|
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s.test_files = Dir["test/**/*"]
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s.add_dependency "rails"
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s.add_dependency "base32"
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s.add_dependency "deface", "~> 1.0.0"
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s.add_dependency "mail"
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s.add_development_dependency "sqlite3"
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end
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@ -0,0 +1,60 @@
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require "mail"
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namespace :foodsoft do
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desc "Parse incoming email on stdin (options: RECIPIENT=f.1.2.a1b2c3d3e5)"
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task :parse_reply_email => :environment do
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m = /(?<foodcoop>[^@]*)\.(?<message_id>\d+)\.(?<user_id>\d+)\.(?<hash>\w+)(@(?<hostname>.*))?/.match(ENV['RECIPIENT'])
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raise "RECIPIENT is missing or has an invalid format" if m.nil?
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raise "Foodcoop '#{m[:foodcoop]}' could not be found" unless FoodsoftConfig.foodcoops.include? m[:foodcoop]
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FoodsoftConfig.select_multifoodcoop m[:foodcoop]
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original_message = Message.find_by_id(m[:message_id])
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user = User.find_by_id(m[:user_id])
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raise "Message could not be found" if original_message.nil?
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raise "User could not be found" if user.nil?
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hash = original_message.mail_hash_for_user user
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raise "Hash does not match expectations" unless hash.casecmp(m[:hash]) == 0
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received_email = STDIN.read
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mail = Mail.new received_email
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mail_part = nil
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if mail.multipart?
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for part in mail.parts
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mail_part = part if MIME::Type.simplified(part.content_type) == "text/plain"
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end
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else
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mail_part = mail
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end
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body = mail_part.body.decoded
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unless mail_part.content_type_parameters.nil?
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body = body.force_encoding mail_part.content_type_parameters[:charset]
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end
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message = user.send_messages.new body: body,
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group: original_message.group,
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private: original_message.private,
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received_email: received_email,
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subject: mail.subject
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if original_message.reply_to
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message.reply_to_message = original_message.reply_to_message
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else
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message.reply_to_message = original_message
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end
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message.add_recipients original_message.recipients
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message.add_recipients [original_message.sender]
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message.save!
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Resque.enqueue(MessageNotifier, FoodsoftConfig.scope, "message_deliver", message.id)
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rake_say "Handled reply email from #{user.display}."
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end
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end
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# Helper
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def rake_say(message)
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puts message unless Rake.application.options.silent
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end
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