Redmine/app/models/mail_handler.rb

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# Redmine - project management software
# Copyright (C) 2006-2014 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 MissingInformation < StandardError; end
attr_reader :email, :user
def self.receive(email, options={})
@@handler_options = options.dup
@@handler_options[:issue] ||= {}
if @@handler_options[:allow_override].is_a?(String)
@@handler_options[:allow_override] = @@handler_options[:allow_override].split(',').collect(&:strip)
end
@@handler_options[:allow_override] ||= []
# Project needs to be overridable if not specified
@@handler_options[:allow_override] << 'project' unless @@handler_options[:issue].has_key?(:project)
# Status overridable by default
@@handler_options[:allow_override] << 'status' unless @@handler_options[:issue].has_key?(:status)
@@handler_options[:no_account_notice] = (@@handler_options[:no_account_notice].to_s == '1')
@@handler_options[:no_notification] = (@@handler_options[:no_notification].to_s == '1')
@@handler_options[:no_permission_check] = (@@handler_options[:no_permission_check].to_s == '1')
email.force_encoding('ASCII-8BIT') if email.respond_to?(:force_encoding)
super(email)
end
# Receives an email and rescues any exception
def self.safe_receive(*args)
receive(*args)
rescue => e
logger.error "An unexpected error occurred when receiving email: #{e.message}" if logger
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).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 default_group).each do |option|
options[option.to_sym] = env[option] if env[option]
end
options
end
def logger
Rails.logger
end
cattr_accessor :ignored_emails_headers
@@ignored_emails_headers = {
'X-Auto-Response-Suppress' => 'oof',
'Auto-Submitted' => /^auto-/
}
# Processes incoming emails
# Returns the created object (eg. an issue, a message) or false
def receive(email)
@email = email
sender_email = email.from.to_a.first.to_s.strip
# Ignore emails received from the application emission address to avoid hell cycles
if sender_email.downcase == Setting.mail_from.to_s.strip.downcase
if logger
logger.info "MailHandler: ignoring email from Redmine emission address [#{sender_email}]"
end
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) && value.match(ignored_value)) || value == ignored_value
if logger
logger.info "MailHandler: ignoring email with #{key}:#{value} header"
end
return false
end
end
end
@user = User.find_by_mail(sender_email) if sender_email.present?
if @user && !@user.active?
if logger
logger.info "MailHandler: ignoring email from non-active user [#{@user.login}]"
end
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
if logger
logger.info "MailHandler: [#{@user.login}] account created"
end
add_user_to_group(@@handler_options[:default_group])
unless @@handler_options[:no_account_notice]
Mailer.account_information(@user, @user.password).deliver
end
else
if logger
logger.error "MailHandler: could not create account for [#{sender_email}]"
end
return false
end
else
# Default behaviour, emails from unknown users are ignored
if logger
logger.info "MailHandler: ignoring email from unknown user [#{sender_email}]"
end
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{\[[^\]]*#(\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 e.message if logger
false
rescue MissingInformation => e
logger.error "MailHandler: missing information from #{user}: #{e.message}" if logger
false
rescue UnauthorizedAction => e
logger.error "MailHandler: unauthorized attempt from #{user}" if logger
false
end
def dispatch_to_default
receive_issue
end
# Creates a new issue
def receive_issue
project = target_project
# check permission
unless @@handler_options[:no_permission_check]
raise UnauthorizedAction unless user.allowed_to?(:add_issues, project)
end
issue = Issue.new(:author => user, :project => project)
issue.safe_attributes = issue_attributes_from_keywords(issue)
issue.safe_attributes = {'custom_field_values' => custom_field_values_from_keywords(issue)}
issue.subject = cleaned_up_subject
if issue.subject.blank?
issue.subject = '(no subject)'
end
issue.description = 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} created by #{user}" if logger
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)
return unless issue
# check permission
unless @@handler_options[:no_permission_check]
unless user.allowed_to?(:add_issue_notes, issue.project) ||
user.allowed_to?(:edit_issues, issue.project)
raise UnauthorizedAction
end
end
# ignore CLI-supplied defaults for new issues
@@handler_options[:issue].clear
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_attachments(issue)
issue.save!
if logger
logger.info "MailHandler: issue ##{issue.id} updated by #{user}"
end
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)
end
end
# Receives a reply to a forum message
def receive_message_reply(message_id)
message = Message.find_by_id(message_id)
if message
message = message.root
unless @@handler_options[:no_permission_check]
raise UnauthorizedAction 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
if logger
logger.info "MailHandler: ignoring reply from [#{sender_email}] to a locked topic"
end
end
end
end
def add_attachments(obj)
if email.attachments && email.attachments.any?
email.attachments.each do |attachment|
next unless accept_attachment?(attachment)
obj.attachments << Attachment.create(:container => obj,
:file => attachment.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|
regexp = %r{\A#{Regexp.escape(pattern).gsub("\\*", ".*")}\z}i
if attachment.filename.to_s =~ regexp
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 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?
User.active.where('LOWER(mail) IN (?)', addresses).each do |w|
obj.add_watcher(w)
end
end
end
end
def get_keyword(attr, options={})
@keywords ||= {}
if @keywords.has_key?(attr)
@keywords[attr]
else
@keywords[attr] = begin
if (options[:override] || @@handler_options[:allow_override].include?(attr.to_s)) &&
(v = extract_keyword!(plain_text_body, attr, options[:format]))
v
elsif !@@handler_options[:issue][attr].blank?
@@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.gsub!(regexp, '')
end
keyword
end
def target_project
# TODO: other ways to specify project:
# * parse the email To field
# * specific project (eg. Setting.mail_handler_target_project)
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.new('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)
assigned_to = (k = get_keyword(:assigned_to, :override => true)) && find_assignee_from_keyword(k, 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' => assigned_to.try(:id),
'fixed_version_id' => (k = get_keyword(:fixed_version, :override => true)) &&
issue.project.shared_versions.named(k).first.try(:id),
'start_date' => get_keyword(:start_date, :override => true, :format => '\d{4}-\d{2}-\d{2}'),
'due_date' => get_keyword(:due_date, :override => true, :format => '\d{4}-\d{2}-\d{2}'),
'estimated_hours' => get_keyword(:estimated_hours, :override => true),
'done_ratio' => get_keyword(:done_ratio, :override => true, :format => '(\d|10)?0')
}.delete_if {|k, v| v.blank? }
if issue.new_record? && attrs['tracker_id'].nil?
attrs['tracker_id'] = issue.project.trackers.first.try(:id)
end
attrs
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, :override => true)
h[v.custom_field.id.to_s] = v.custom_field.value_from_keyword(keyword, customized)
end
h
end
end
# Returns the text/plain part of the email
# If not found (eg. HTML-only email), returns the body with tags removed
def plain_text_body
return @plain_text_body unless @plain_text_body.nil?
parts = if (text_parts = email.all_parts.select {|p| p.mime_type == 'text/plain'}).present?
text_parts
elsif (html_parts = email.all_parts.select {|p| p.mime_type == 'text/html'}).present?
html_parts
else
[email]
end
parts.reject! do |part|
part.header[:content_disposition].try(:disposition_type) == 'attachment'
end
@plain_text_body = parts.map do |p|
body_charset = p.charset.respond_to?(:force_encoding) ?
Mail::RubyVer.pick_encoding(p.charset).to_s : p.charset
Redmine::CodesetUtil.to_utf8(p.body.decoded, body_charset)
end.join("\r\n")
# strip html tags and remove doctype directive
if parts.any? {|p| p.mime_type == 'text/html'}
@plain_text_body = strip_tags(@plain_text_body.strip)
@plain_text_body.sub! %r{^<!DOCTYPE .*$}, ''
end
@plain_text_body
end
def 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.full_sanitizer
@full_sanitizer ||= HTML::FullSanitizer.new
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
# Returns a User from an email address and a full name
def self.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(/@.*$/, '').split('.') : fullname.split
assign_string_attribute_with_limit(user, 'firstname', names.shift, 30)
assign_string_attribute_with_limit(user, 'lastname', names.join(' '), 30)
user.lastname = '-' if user.lastname.blank?
user.language = Setting.default_language
user.generate_password = true
user.mail_notification = 'only_my_events'
unless user.valid?
user.login = "user#{Redmine::Utils.random_hex(6)}" unless user.errors[:login].blank?
user.firstname = "-" unless user.errors[:firstname].blank?
(puts user.errors[:lastname];user.lastname = "-") unless user.errors[:lastname].blank?
end
user
end
# Creates a User for the +email+ sender
# Returns the user or nil if it could not be created
def create_user_from_email
from = email.header['from'].to_s
addr, name = from, nil
if m = from.match(/^"?(.+?)"?\s+<(.+@.+)>$/)
addr, name = m[2], m[1]
end
if addr.present?
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}" if logger
nil
end
else
logger.error "MailHandler: failed to create User: no FROM address found" if logger
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?).map {|s| Regexp.escape(s)}
unless delimiters.empty?
regex = Regexp.new("^[> ]*(#{ delimiters.join('|') })\s*[\r\n].*", Regexp::MULTILINE)
body = body.gsub(regex, '')
end
body.strip
end
def find_assignee_from_keyword(keyword, issue)
keyword = keyword.to_s.downcase
assignable = issue.assignable_users
assignee = nil
assignee ||= assignable.detect {|a|
a.mail.to_s.downcase == keyword ||
a.login.to_s.downcase == keyword
}
if assignee.nil? && keyword.match(/ /)
firstname, lastname = *(keyword.split) # "First Last Throwaway"
assignee ||= assignable.detect {|a|
a.is_a?(User) && a.firstname.to_s.downcase == firstname &&
a.lastname.to_s.downcase == lastname
}
end
if assignee.nil?
assignee ||= assignable.detect {|a| a.name.downcase == keyword}
end
assignee
end
end