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- # frozen_string_literal: true
-
- # Redmine - project management software
- # Copyright (C) 2006-2023 Jean-Philippe Lang
- #
- # This program is free software; you can redistribute it and/or
- # modify it under the terms of the GNU General Public License
- # as published by the Free Software Foundation; either version 2
- # of the License, or (at your option) any later version.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License
- # along with this program; if not, write to the Free Software
- # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
-
- class MailHandler < ActionMailer::Base
- include ActionView::Helpers::SanitizeHelper
- include Redmine::I18n
-
- class UnauthorizedAction < StandardError; end
- class NotAllowedInProject < UnauthorizedAction; end
- class InsufficientPermissions < UnauthorizedAction; end
- class LockedTopic < UnauthorizedAction; end
- class MissingInformation < StandardError; end
- class MissingContainer < StandardError; end
-
- attr_reader :email, :user, :handler_options
-
- def self.receive(raw_mail, options={})
- options = options.deep_dup
-
- options[:issue] ||= {}
-
- options[:allow_override] ||= []
- if options[:allow_override].is_a?(String)
- options[:allow_override] = options[:allow_override].split(',')
- end
- options[:allow_override].map! {|s| s.strip.downcase.gsub(/\s+/, '_')}
- # Project needs to be overridable if not specified
- options[:allow_override] << 'project' unless options[:issue].has_key?(:project)
-
- options[:no_account_notice] = (options[:no_account_notice].to_s == '1')
- options[:no_notification] = (options[:no_notification].to_s == '1')
- options[:no_permission_check] = (options[:no_permission_check].to_s == '1')
-
- ActiveSupport::Notifications.instrument("receive.action_mailer") do |payload|
- mail = Mail.new(raw_mail.b)
- set_payload_for_mail(payload, mail)
- new.receive(mail, options)
- end
- end
-
- # Receives an email and rescues any exception
- def self.safe_receive(*args)
- receive(*args)
- rescue => e
- Rails.logger.error "MailHandler: an unexpected error occurred when receiving email: #{e.message}"
- return false
- end
-
- # Extracts MailHandler options from environment variables
- # Use when receiving emails with rake tasks
- def self.extract_options_from_env(env)
- options = {:issue => {}}
- %w(project status tracker category priority assigned_to fixed_version).each do |option|
- options[:issue][option.to_sym] = env[option] if env[option]
- end
- %w(allow_override unknown_user no_permission_check no_account_notice no_notification default_group project_from_subaddress).each do |option|
- options[option.to_sym] = env[option] if env[option]
- end
- if env['private']
- options[:issue][:is_private] = '1'
- end
- options
- end
-
- def logger
- Rails.logger
- end
-
- cattr_accessor :ignored_emails_headers
- self.ignored_emails_headers = {
- 'Auto-Submitted' => /\Aauto-(replied|generated)/,
- 'X-Autoreply' => 'yes'
- }
-
- # Processes incoming emails
- # Returns the created object (eg. an issue, a message) or false
- def receive(email, options={})
- @email = email
- @handler_options = options
- sender_email = email.from.to_a.first.to_s.strip
- # Ignore emails received from the application emission address to avoid hell cycles
- emission_address = Setting.mail_from.to_s.gsub(/(?:.*<|>.*|\(.*\))/, '').strip
- if sender_email.casecmp(emission_address) == 0
- logger&.info "MailHandler: ignoring email from Redmine emission address [#{sender_email}]"
- return false
- end
- # Ignore auto generated emails
- self.class.ignored_emails_headers.each do |key, ignored_value|
- value = email.header[key]
- if value
- value = value.to_s.downcase
- if (ignored_value.is_a?(Regexp) && ignored_value.match?(value)) || value == ignored_value
- logger&.info "MailHandler: ignoring email with #{key}:#{value} header"
- return false
- end
- end
- end
- @user = User.find_by_mail(sender_email) if sender_email.present?
- if @user && !@user.active?
- logger&.info "MailHandler: ignoring email from non-active user [#{@user.login}]"
- return false
- end
- if @user.nil?
- # Email was submitted by an unknown user
- case handler_options[:unknown_user]
- when 'accept'
- @user = User.anonymous
- when 'create'
- @user = create_user_from_email
- if @user
- logger&.info "MailHandler: [#{@user.login}] account created"
- add_user_to_group(handler_options[:default_group])
- unless handler_options[:no_account_notice]
- ::Mailer.deliver_account_information(@user, @user.password)
- end
- else
- logger&.error "MailHandler: could not create account for [#{sender_email}]"
- return false
- end
- else
- # Default behaviour, emails from unknown users are ignored
- logger&.info "MailHandler: ignoring email from unknown user [#{sender_email}]"
- return false
- end
- end
- User.current = @user
- dispatch
- end
-
- private
-
- MESSAGE_ID_RE = %r{^<?redmine\.([a-z0-9_]+)\-(\d+)\.\d+(\.[a-f0-9]+)?@}
- ISSUE_REPLY_SUBJECT_RE = %r{\[(?:[^\]]*\s+)?#(\d+)\]}
- MESSAGE_REPLY_SUBJECT_RE = %r{\[[^\]]*msg(\d+)\]}
-
- def dispatch
- headers = [email.in_reply_to, email.references].flatten.compact
- subject = email.subject.to_s
- if headers.detect {|h| h.to_s =~ MESSAGE_ID_RE}
- klass, object_id = $1, $2.to_i
- method_name = "receive_#{klass}_reply"
- if self.class.private_instance_methods.collect(&:to_s).include?(method_name)
- send method_name, object_id
- else
- # ignoring it
- end
- elsif m = subject.match(ISSUE_REPLY_SUBJECT_RE)
- receive_issue_reply(m[1].to_i)
- elsif m = subject.match(MESSAGE_REPLY_SUBJECT_RE)
- receive_message_reply(m[1].to_i)
- else
- dispatch_to_default
- end
- rescue ActiveRecord::RecordInvalid => e
- # TODO: send a email to the user
- logger&.error "MailHandler: #{e.message}"
- false
- rescue MissingInformation => e
- logger&.error "MailHandler: missing information from #{user}: #{e.message}"
- false
- rescue MissingContainer => e
- logger&.error "MailHandler: reply to nonexistant object from #{user}: #{e.message}"
- false
- rescue UnauthorizedAction => e
- logger&.error "MailHandler: unauthorized attempt from #{user}: #{e.message}"
- false
- end
-
- def dispatch_to_default
- receive_issue
- end
-
- # Creates a new issue
- def receive_issue
- project = target_project
-
- # Never receive emails to projects where adding issues is not possible
- raise NotAllowedInProject, "not possible to add issues to project [#{project.name}]" unless project.allows_to?(:add_issues)
-
- # check permission
- unless handler_options[:no_permission_check]
- raise InsufficientPermissions, "not allowed to add issues to project [#{project.name}]" unless user.allowed_to?(:add_issues, project)
- end
-
- issue = Issue.new(:author => user, :project => project)
- attributes = issue_attributes_from_keywords(issue)
- if handler_options[:no_permission_check]
- issue.tracker_id = attributes['tracker_id']
- if project
- issue.tracker_id ||= project.trackers.first.try(:id)
- end
- end
- issue.safe_attributes = attributes
- issue.safe_attributes = {'custom_field_values' => custom_field_values_from_keywords(issue)}
- issue.subject = cleaned_up_subject
- if issue.subject.blank?
- issue.subject = "(#{ll(Setting.default_language, :text_no_subject)})"
- end
- issue.description = cleaned_up_text_body
- issue.start_date ||= User.current.today if Setting.default_issue_start_date_to_creation_date?
- if handler_options[:issue][:is_private] == '1'
- issue.is_private = true
- end
-
- # add To and Cc as watchers before saving so the watchers can reply to Redmine
- add_watchers(issue)
- issue.save!
- add_attachments(issue)
- logger&.info "MailHandler: issue ##{issue.id} created by #{user}"
- issue
- end
-
- # Adds a note to an existing issue
- def receive_issue_reply(issue_id, from_journal=nil)
- issue = Issue.find_by(:id => issue_id)
- if issue.nil?
- raise MissingContainer, "reply to nonexistant issue [##{issue_id}]"
- end
-
- # Never receive emails to projects where adding issue notes is not possible
- project = issue.project
- raise NotAllowedInProject, "not possible to add notes to project [#{project.name}]" unless project.allows_to?(:add_issue_notes)
-
- # check permission
- unless handler_options[:no_permission_check]
- unless issue.notes_addable?
- raise InsufficientPermissions, "not allowed to add notes on issues to project [#{issue.project.name}]"
- end
- end
-
- # ignore CLI-supplied defaults for new issues
- handler_options[:issue] = {}
-
- journal = issue.init_journal(user)
- if from_journal && from_journal.private_notes?
- # If the received email was a reply to a private note, make the added note private
- issue.private_notes = true
- end
- issue.safe_attributes = issue_attributes_from_keywords(issue)
- issue.safe_attributes = {'custom_field_values' => custom_field_values_from_keywords(issue)}
- journal.notes = cleaned_up_text_body
-
- # add To and Cc as watchers before saving so the watchers can reply to Redmine
- add_watchers(issue)
- issue.save!
- add_attachments(issue)
- logger&.info "MailHandler: issue ##{issue.id} updated by #{user}"
- journal
- end
-
- # Reply will be added to the issue
- def receive_journal_reply(journal_id)
- journal = Journal.find_by(:id => journal_id)
-
- if journal && journal.journalized_type == 'Issue'
- receive_issue_reply(journal.journalized_id, journal)
- elsif m = email.subject.to_s.match(ISSUE_REPLY_SUBJECT_RE)
- logger&.info "MailHandler: reply to a nonexistant journal, calling receive_issue_reply with issue from subject"
- receive_issue_reply(m[1].to_i)
- else
- raise MissingContainer, "reply to nonexistant journal [#{journal_id}]"
- end
- end
-
- # Receives a reply to a forum message
- def receive_message_reply(message_id)
- message = Message.find_by(:id => message_id)&.root
- if message.nil?
- raise MissingContainer, "reply to nonexistant message [#{message_id}]"
- end
-
- # Never receive emails to projects where adding messages is not possible
- project = message.project
- raise NotAllowedInProject, "not possible to add messages to project [#{project.name}]" unless project.allows_to?(:add_messages)
-
- unless handler_options[:no_permission_check]
- raise InsufficientPermissions, "not allowed to add messages to project [#{message.project.name}]" unless user.allowed_to?(:add_messages, message.project)
- end
-
- if !message.locked?
- reply = Message.new(:subject => cleaned_up_subject.gsub(%r{^.*msg\d+\]}, '').strip,
- :content => cleaned_up_text_body)
- reply.author = user
- reply.board = message.board
- message.children << reply
- add_attachments(reply)
- reply
- else
- raise LockedTopic, "ignoring reply to a locked message [#{message.id} #{message.subject}]"
- end
- end
-
- # Receives a reply to a news entry
- def receive_news_reply(news_id)
- news = News.find_by_id(news_id)
- if news.nil?
- raise MissingContainer, "reply to nonexistant news [#{news_id}]"
- end
-
- # Never receive emails to projects where adding news comments is not possible
- project = news.project
- raise NotAllowedInProject, "not possible to add news comments to project [#{project.name}]" unless project.allows_to?(:comment_news)
-
- unless handler_options[:no_permission_check]
- unless news.commentable?(user)
- raise InsufficientPermissions, "not allowed to comment on news item [#{news.id} #{news.title}]"
- end
- end
-
- comment = news.comments.new
- comment.author = user
- comment.comments = cleaned_up_text_body
- comment.save!
- comment
- end
-
- # Receives a reply to a comment to a news entry
- def receive_comment_reply(comment_id)
- comment = Comment.find_by_id(comment_id)
-
- if comment && comment.commented_type == 'News'
- receive_news_reply(comment.commented.id)
- else
- raise MissingContainer, "reply to nonexistant comment [#{comment_id}]"
- end
- end
-
- def add_attachments(obj)
- if email.attachments && email.attachments.any?
- email.attachments.each do |attachment|
- next unless accept_attachment?(attachment)
- next unless attachment.body.decoded.size > 0
-
- obj.attachments << Attachment.create(:container => obj,
- :file => attachment.body.decoded,
- :filename => attachment.filename,
- :author => user,
- :content_type => attachment.mime_type)
- end
- end
- end
-
- # Returns false if the +attachment+ of the incoming email should be ignored
- def accept_attachment?(attachment)
- @excluded ||= Setting.mail_handler_excluded_filenames.to_s.split(',').map(&:strip).reject(&:blank?)
- @excluded.each do |pattern|
- if Setting.mail_handler_enable_regex_excluded_filenames?
- regexp = %r{\A#{pattern}\z}i
- else
- regexp = %r{\A#{Regexp.escape(pattern).gsub("\\*", ".*")}\z}i
- end
- if regexp.match?(attachment.filename.to_s)
- logger.info "MailHandler: ignoring attachment #{attachment.filename} matching #{pattern}"
- return false
- end
- end
- true
- end
-
- # Adds To and Cc as watchers of the given object if the sender has the
- # appropriate permission
- def add_watchers(obj)
- if handler_options[:no_permission_check] || user.allowed_to?("add_#{obj.class.name.underscore}_watchers".to_sym, obj.project)
- addresses = [email.to, email.cc].flatten.compact.uniq.collect {|a| a.strip.downcase}
- unless addresses.empty?
- users = User.active.having_mail(addresses).to_a
- users -= obj.watcher_users
- users.each do |u|
- obj.add_watcher(u)
- end
- end
- end
- end
-
- def get_keyword(attr, options={})
- @keywords ||= {}
- if @keywords.has_key?(attr)
- @keywords[attr]
- else
- @keywords[attr] = begin
- override =
- if options.key?(:override)
- options[:override]
- else
- (handler_options[:allow_override] & [attr.to_s.downcase.gsub(/\s+/, '_'), 'all']).present?
- end
- if override && (v = extract_keyword!(cleaned_up_text_body, attr, options[:format]))
- v
- elsif handler_options[:issue][attr].present?
- handler_options[:issue][attr]
- end
- end
- end
- end
-
- # Destructively extracts the value for +attr+ in +text+
- # Returns nil if no matching keyword found
- def extract_keyword!(text, attr, format=nil)
- keys = [attr.to_s.humanize]
- if attr.is_a?(Symbol)
- if user && user.language.present?
- keys << l("field_#{attr}", :default => '', :locale => user.language)
- end
- if Setting.default_language.present?
- keys << l("field_#{attr}", :default => '', :locale => Setting.default_language)
- end
- end
- keys.reject! {|k| k.blank?}
- keys.collect! {|k| Regexp.escape(k)}
- format ||= '.+'
- keyword = nil
- regexp = /^(#{keys.join('|')})[ \t]*:[ \t]*(#{format})\s*$/i
- if m = text.match(regexp)
- keyword = m[2].strip
- text.sub!(regexp, '')
- end
- keyword
- end
-
- def get_project_from_receiver_addresses
- local, domain = handler_options[:project_from_subaddress].to_s.split("@")
- return nil unless local && domain
-
- local = Regexp.escape(local)
-
- [:to, :cc, :bcc].each do |field|
- header = @email[field]
- next if header.blank? || header.field.blank? || !header.field.respond_to?(:addrs)
-
- header.field.addrs.each do |addr|
- if addr.domain.to_s.casecmp(domain)==0 && addr.local.to_s =~ /\A#{local}\+([^+]+)\z/
- if project = Project.find_by_identifier($1)
- return project
- end
- end
- end
- end
- nil
- end
-
- def target_project
- # TODO: other ways to specify project:
- # * parse the email To field
- # * specific project (eg. Setting.mail_handler_target_project)
- target = get_project_from_receiver_addresses
- target ||= Project.find_by_identifier(get_keyword(:project))
- if target.nil?
- # Invalid project keyword, use the project specified as the default one
- default_project = handler_options[:issue][:project]
- if default_project.present?
- target = Project.find_by_identifier(default_project)
- end
- end
- raise MissingInformation, 'Unable to determine target project' if target.nil?
-
- target
- end
-
- # Returns a Hash of issue attributes extracted from keywords in the email body
- def issue_attributes_from_keywords(issue)
- attrs = {
- 'tracker_id' => (k = get_keyword(:tracker)) && issue.project.trackers.named(k).first.try(:id),
- 'status_id' => (k = get_keyword(:status)) && IssueStatus.named(k).first.try(:id),
- 'priority_id' => (k = get_keyword(:priority)) && IssuePriority.named(k).first.try(:id),
- 'category_id' => (k = get_keyword(:category)) && issue.project.issue_categories.named(k).first.try(:id),
- 'assigned_to_id' => (k = get_keyword(:assigned_to)) && find_assignee_from_keyword(k, issue).try(:id),
- 'fixed_version_id' => (k = get_keyword(:fixed_version)) && issue.project.shared_versions.named(k).first.try(:id),
- 'start_date' => get_keyword(:start_date, :format => '\d{4}-\d{2}-\d{2}'),
- 'due_date' => get_keyword(:due_date, :format => '\d{4}-\d{2}-\d{2}'),
- 'estimated_hours' => get_keyword(:estimated_hours),
- 'done_ratio' => get_keyword(:done_ratio, :format => '(\d|10)?0'),
- 'is_private' => get_keyword_bool(:is_private),
- 'parent_issue_id' => get_keyword(:parent_issue)
- }.delete_if {|k, v| v.blank?}
-
- attrs
- end
-
- def get_keyword_bool(attr)
- true_values = ["1"]
- false_values = ["0"]
- locales = [Setting.default_language]
- if user
- locales << user.language
- end
- locales.select(&:present?).each do |locale|
- true_values << l("general_text_yes", :default => '', :locale => locale)
- true_values << l("general_text_Yes", :default => '', :locale => locale)
- false_values << l("general_text_no", :default => '', :locale => locale)
- false_values << l("general_text_No", :default => '', :locale => locale)
- end
- values = (true_values + false_values).select(&:present?)
- format = Regexp.union values
- if value = get_keyword(attr, :format => format)
- if true_values.include?(value)
- return true
- elsif false_values.include?(value)
- return false
- end
- end
- nil
- end
-
- # Returns a Hash of issue custom field values extracted from keywords in the email body
- def custom_field_values_from_keywords(customized)
- customized.custom_field_values.inject({}) do |h, v|
- if keyword = get_keyword(v.custom_field.name)
- h[v.custom_field.id.to_s] = v.custom_field.value_from_keyword(keyword, customized)
- end
- h
- end
- end
-
- # Returns the text content of the email.
- # If the value of Setting.mail_handler_preferred_body_part is 'html',
- # it returns text converted from the text/html part of the email.
- # Otherwise, it returns text/plain part.
- def plain_text_body
- return @plain_text_body unless @plain_text_body.nil?
-
- parse_order =
- if Setting.mail_handler_preferred_body_part == 'html'
- ['text/html', 'text/plain']
- else
- ['text/plain', 'text/html']
- end
- parse_order.each do |mime_type|
- @plain_text_body ||= email_parts_to_text(email.all_parts.select {|p| p.mime_type == mime_type}).presence
- return @plain_text_body unless @plain_text_body.nil?
- end
-
- # If there is still no body found, and there are no mime-parts defined,
- # we use the whole raw mail body
- @plain_text_body ||= email_parts_to_text([email]).presence if email.all_parts.empty?
-
- # As a fallback we return an empty plain text body (e.g. if we have only
- # empty text parts but a non-text attachment)
- @plain_text_body ||= ""
- end
-
- def email_parts_to_text(parts)
- parts.reject! do |part|
- part.attachment?
- end
- parts.map do |p|
- body_charset = Mail::Utilities.pick_encoding(p.charset).to_s
- body = Redmine::CodesetUtil.to_utf8(p.body.decoded, body_charset)
- # convert html parts to text
- p.mime_type == 'text/html' ? self.class.html_body_to_text(body) : self.class.plain_text_body_to_text(body)
- end.join("\r\n")
- end
-
- def cleaned_up_text_body
- @cleaned_up_text_body ||= cleanup_body(plain_text_body)
- end
-
- def cleaned_up_subject
- subject = email.subject.to_s
- subject.strip[0, 255]
- end
-
- def self.assign_string_attribute_with_limit(object, attribute, value, limit=nil)
- limit ||= object.class.columns_hash[attribute.to_s].limit || 255
- value = value.to_s.slice(0, limit)
- object.send("#{attribute}=", value)
- end
- private_class_method :assign_string_attribute_with_limit
-
- # Singleton class method is public
- class << self
- # Converts a HTML email body to text
- def html_body_to_text(html)
- Redmine::WikiFormatting.html_parser.to_text(html)
- end
-
- # Converts a plain/text email body to text
- def plain_text_body_to_text(text)
- # Removes leading spaces that would cause the line to be rendered as
- # preformatted text with textile
- text.gsub(/^ +(?![*#])/, '')
- end
-
- # Returns a User from an email address and a full name
- def new_user_from_attributes(email_address, fullname=nil)
- user = User.new
-
- # Truncating the email address would result in an invalid format
- user.mail = email_address
- assign_string_attribute_with_limit(user, 'login', email_address, User::LOGIN_LENGTH_LIMIT)
-
- names = fullname.blank? ? email_address.gsub(/@.*$/, '').split('.') : fullname.split
- assign_string_attribute_with_limit(user, 'firstname', names.shift, 30)
- assign_string_attribute_with_limit(user, 'lastname', names.join(' '), 30)
- user.lastname = '-' if user.lastname.blank?
- user.language = Setting.default_language
- user.generate_password = true
- user.mail_notification = 'only_my_events'
-
- unless user.valid?
- user.login = "user#{Redmine::Utils.random_hex(6)}" unless user.errors[:login].blank?
- user.firstname = "-" unless user.errors[:firstname].blank?
- user.lastname = "-" unless user.errors[:lastname].blank?
- end
- user
- end
- end
-
- # Creates a User for the +email+ sender
- # Returns the user or nil if it could not be created
- def create_user_from_email
- if from_addr = email.header['from'].try(:addrs).to_a.first
- addr = from_addr.address
- name = from_addr.display_name || from_addr.comments.to_a.first
- user = self.class.new_user_from_attributes(addr, name)
- if handler_options[:no_notification]
- user.mail_notification = 'none'
- end
- if user.save
- user
- else
- logger&.error "MailHandler: failed to create User: #{user.errors.full_messages}"
- nil
- end
- else
- logger&.error "MailHandler: failed to create User: no FROM address found"
- nil
- end
- end
-
- # Adds the newly created user to default group
- def add_user_to_group(default_group)
- if default_group.present?
- default_group.split(',').each do |group_name|
- if group = Group.named(group_name).first
- group.users << @user
- elsif logger
- logger.warn "MailHandler: could not add user to [#{group_name}], group not found"
- end
- end
- end
- end
-
- # Removes the email body of text after the truncation configurations.
- def cleanup_body(body)
- delimiters = Setting.mail_handler_body_delimiters.to_s.split(/[\r\n]+/).reject(&:blank?)
-
- if Setting.mail_handler_enable_regex_delimiters?
- begin
- delimiters = delimiters.map {|s| Regexp.new(s)}
- rescue RegexpError => e
- logger&.error "MailHandler: invalid regexp delimiter found in mail_handler_body_delimiters setting (#{e.message})"
- end
- else
- # In a "normal" delimiter, allow a single space from the originally
- # defined delimiter to match:
- # * any space-like character, or
- # * line-breaks and optional quoting with arbitrary spacing around it
- # in the mail in order to allow line breaks of delimiters.
- delimiters = delimiters.map do |delimiter|
- delimiter = Regexp.escape(delimiter).encode!(Encoding::UTF_8)
- delimiter = delimiter.gsub(/(\\ )+/, '\p{Space}*(\p{Space}|[\r\n](\p{Space}|>)*)')
- Regexp.new(delimiter)
- end
- end
-
- unless delimiters.empty?
- regex = Regexp.new("^(\\p{Space}|>)*(#{ Regexp.union(delimiters) })\\p{Space}*[\\r\\n].*", Regexp::MULTILINE)
- if Setting.text_formatting == "common_mark" && Redmine::Configuration['common_mark_enable_hardbreaks'] == false
- body = Redmine::WikiFormatting::CommonMark::AppendSpacesToLines.call(body)
- end
- body = body.gsub(regex, '')
- end
- body.strip
- end
-
- def find_assignee_from_keyword(keyword, issue)
- Principal.detect_by_keyword(issue.assignable_users, keyword)
- end
- end
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