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# Redmine - project management software
# Copyright (C) 2006-2011 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.
require "digest/md5"
class Attachment < ActiveRecord::Base
belongs_to :container, :polymorphic => true
belongs_to :author, :class_name => "User", :foreign_key => "author_id"
validates_presence_of :container, :filename, :author
validates_length_of :filename, :maximum => 255
validates_length_of :disk_filename, :maximum => 255
validate :validate_max_file_size
acts_as_event :title => :filename,
:url => Proc.new {|o| {:controller => 'attachments', :action => 'download', :id => o.id, :filename => o.filename}}
acts_as_activity_provider :type => 'files',
:permission => :view_files,
:author_key => :author_id,
:find_options => {:select => "#{Attachment.table_name}.*",
:joins => "LEFT JOIN #{Version.table_name} ON #{Attachment.table_name}.container_type='Version' AND #{Version.table_name}.id = #{Attachment.table_name}.container_id " +
"LEFT JOIN #{Project.table_name} ON #{Version.table_name}.project_id = #{Project.table_name}.id OR ( #{Attachment.table_name}.container_type='Project' AND #{Attachment.table_name}.container_id = #{Project.table_name}.id )"}
acts_as_activity_provider :type => 'documents',
:permission => :view_documents,
:author_key => :author_id,
:find_options => {:select => "#{Attachment.table_name}.*",
:joins => "LEFT JOIN #{Document.table_name} ON #{Attachment.table_name}.container_type='Document' AND #{Document.table_name}.id = #{Attachment.table_name}.container_id " +
"LEFT JOIN #{Project.table_name} ON #{Document.table_name}.project_id = #{Project.table_name}.id"}
cattr_accessor :storage_path
@@storage_path = Redmine::Configuration['attachments_storage_path'] || "#{Rails.root}/files"
before_save :files_to_final_location
def validate_max_file_size
if self.filesize > Setting.attachment_max_size.to_i.kilobytes
errors.add(:base, :too_long, :count => Setting.attachment_max_size.to_i.kilobytes)
end
end
def file=(incoming_file)
unless incoming_file.nil?
@temp_file = incoming_file
if @temp_file.size > 0
self.filename = sanitize_filename(@temp_file.original_filename)
self.disk_filename = Attachment.disk_filename(filename)
self.content_type = @temp_file.content_type.to_s.chomp
if content_type.blank?
self.content_type = Redmine::MimeType.of(filename)
end
self.filesize = @temp_file.size
end
end
end
def file
nil
end
# Copies the temporary file to its final location
# and computes its MD5 hash
def files_to_final_location
if @temp_file && (@temp_file.size > 0)
logger.info("Saving attachment '#{self.diskfile}' (#{@temp_file.size} bytes)")
md5 = Digest::MD5.new
File.open(diskfile, "wb") do |f|
buffer = ""
while (buffer = @temp_file.read(8192))
f.write(buffer)
md5.update(buffer)
end
end
self.digest = md5.hexdigest
end
@temp_file = nil
# Don't save the content type if it's longer than the authorized length
if self.content_type && self.content_type.length > 255
self.content_type = nil
end
end
# Deletes file on the disk
def after_destroy
File.delete(diskfile) if !filename.blank? && File.exist?(diskfile)
end
# Returns file's location on disk
def diskfile
"#{@@storage_path}/#{self.disk_filename}"
end
def increment_download
increment!(:downloads)
end
def project
container.project
end
def visible?(user=User.current)
container.attachments_visible?(user)
end
def deletable?(user=User.current)
container.attachments_deletable?(user)
end
def image?
self.filename =~ /\.(jpe?g|gif|png)$/i
end
def is_text?
Redmine::MimeType.is_type?('text', filename)
end
def is_diff?
self.filename =~ /\.(patch|diff)$/i
end
# Returns true if the file is readable
def readable?
File.readable?(diskfile)
end
# Bulk attaches a set of files to an object
#
# Returns a Hash of the results:
# :files => array of the attached files
# :unsaved => array of the files that could not be attached
def self.attach_files(obj, attachments)
attached = []
if attachments && attachments.is_a?(Hash)
attachments.each_value do |attachment|
file = attachment['file']
next unless file && file.size > 0
a = Attachment.create(:container => obj,
:file => file,
:description => attachment['description'].to_s.strip,
:author => User.current)
obj.attachments << a
if a.new_record?
obj.unsaved_attachments ||= []
obj.unsaved_attachments << a
else
attached << a
end
end
end
{:files => attached, :unsaved => obj.unsaved_attachments}
end
private
def sanitize_filename(value)
# get only the filename, not the whole path
just_filename = value.gsub(/^.*(\\|\/)/, '')
# NOTE: File.basename doesn't work right with Windows paths on Unix
# INCORRECT: just_filename = File.basename(value.gsub('\\\\', '/'))
# Finally, replace all non alphanumeric, hyphens or periods with underscore
@filename = just_filename.gsub(/[^\w\.\-]/,'_')
end
# Returns an ASCII or hashed filename
def self.disk_filename(filename)
timestamp = DateTime.now.strftime("%y%m%d%H%M%S")
ascii = ''
if filename =~ %r{^[a-zA-Z0-9_\.\-]*$}
ascii = filename
else
ascii = Digest::MD5.hexdigest(filename)
# keep the extension if any
ascii << $1 if filename =~ %r{(\.[a-zA-Z0-9]+)$}
end
while File.exist?(File.join(@@storage_path, "#{timestamp}_#{ascii}"))
timestamp.succ!
end
"#{timestamp}_#{ascii}"
end
end
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