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# Redmine - project management software
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# Copyright (C) 2006-2012 Jean-Philippe Lang
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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require "digest/md5"
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class Attachment < ActiveRecord::Base
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belongs_to :container, :polymorphic => true
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belongs_to :author, :class_name => "User", :foreign_key => "author_id"
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validates_presence_of :filename, :author
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validates_length_of :filename, :maximum => 255
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validates_length_of :disk_filename, :maximum => 255
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validate :validate_max_file_size
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acts_as_event :title => :filename,
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:url => Proc.new {|o| {:controller => 'attachments', :action => 'download', :id => o.id, :filename => o.filename}}
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acts_as_activity_provider :type => 'files',
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:permission => :view_files,
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:author_key => :author_id,
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:find_options => {:select => "#{Attachment.table_name}.*",
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:joins => "LEFT JOIN #{Version.table_name} ON #{Attachment.table_name}.container_type='Version' AND #{Version.table_name}.id = #{Attachment.table_name}.container_id " +
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"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 )"}
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acts_as_activity_provider :type => 'documents',
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:permission => :view_documents,
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:author_key => :author_id,
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:find_options => {:select => "#{Attachment.table_name}.*",
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:joins => "LEFT JOIN #{Document.table_name} ON #{Attachment.table_name}.container_type='Document' AND #{Document.table_name}.id = #{Attachment.table_name}.container_id " +
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"LEFT JOIN #{Project.table_name} ON #{Document.table_name}.project_id = #{Project.table_name}.id"}
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cattr_accessor :storage_path
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@@storage_path = Redmine::Configuration['attachments_storage_path'] || "#{Rails.root}/files"
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before_save :files_to_final_location
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after_destroy :delete_from_disk
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def container_with_blank_type_check
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if container_type.blank?
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nil
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else
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container_without_blank_type_check
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end
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end
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alias_method_chain :container, :blank_type_check unless method_defined?(:container_without_blank_type_check)
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# Returns an unsaved copy of the attachment
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def copy(attributes=nil)
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copy = self.class.new
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copy.attributes = self.attributes.dup.except("id", "downloads")
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copy.attributes = attributes if attributes
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copy
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end
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def validate_max_file_size
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if @temp_file && self.filesize > Setting.attachment_max_size.to_i.kilobytes
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errors.add(:base, l(:error_attachment_too_big, :max_size => Setting.attachment_max_size.to_i.kilobytes))
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end
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end
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def file=(incoming_file)
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unless incoming_file.nil?
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@temp_file = incoming_file
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if @temp_file.size > 0
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if @temp_file.respond_to?(:original_filename)
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self.filename = @temp_file.original_filename
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end
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if @temp_file.respond_to?(:content_type)
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self.content_type = @temp_file.content_type.to_s.chomp
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end
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if content_type.blank? && filename.present?
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self.content_type = Redmine::MimeType.of(filename)
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end
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self.filesize = @temp_file.size
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end
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end
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end
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def file
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nil
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end
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def filename=(arg)
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write_attribute :filename, sanitize_filename(arg.to_s)
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if new_record? && disk_filename.blank?
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self.disk_filename = Attachment.disk_filename(filename)
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end
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filename
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end
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# Copies the temporary file to its final location
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# and computes its MD5 hash
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def files_to_final_location
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if @temp_file && (@temp_file.size > 0)
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logger.info("Saving attachment '#{self.diskfile}' (#{@temp_file.size} bytes)")
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md5 = Digest::MD5.new
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File.open(diskfile, "wb") do |f|
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buffer = ""
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while (buffer = @temp_file.read(8192))
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f.write(buffer)
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md5.update(buffer)
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end
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end
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self.digest = md5.hexdigest
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end
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@temp_file = nil
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# Don't save the content type if it's longer than the authorized length
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if self.content_type && self.content_type.length > 255
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self.content_type = nil
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end
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end
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# Deletes the file from the file system if it's not referenced by other attachments
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def delete_from_disk
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if Attachment.first(:conditions => ["disk_filename = ? AND id <> ?", disk_filename, id]).nil?
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delete_from_disk!
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end
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end
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# Returns file's location on disk
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def diskfile
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"#{@@storage_path}/#{self.disk_filename}"
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end
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def increment_download
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increment!(:downloads)
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end
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def project
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container.try(:project)
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end
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def visible?(user=User.current)
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container && container.attachments_visible?(user)
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end
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def deletable?(user=User.current)
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container && container.attachments_deletable?(user)
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end
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def image?
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self.filename =~ /\.(bmp|gif|jpg|jpe|jpeg|png)$/i
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end
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def is_text?
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Redmine::MimeType.is_type?('text', filename)
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end
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def is_diff?
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self.filename =~ /\.(patch|diff)$/i
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end
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# Returns true if the file is readable
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def readable?
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File.readable?(diskfile)
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end
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# Returns the attachment token
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def token
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"#{id}.#{digest}"
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end
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# Finds an attachment that matches the given token and that has no container
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def self.find_by_token(token)
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if token.to_s =~ /^(\d+)\.([0-9a-f]+)$/
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attachment_id, attachment_digest = $1, $2
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attachment = Attachment.first(:conditions => {:id => attachment_id, :digest => attachment_digest})
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if attachment && attachment.container.nil?
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attachment
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end
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end
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end
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# Bulk attaches a set of files to an object
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#
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# Returns a Hash of the results:
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# :files => array of the attached files
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# :unsaved => array of the files that could not be attached
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def self.attach_files(obj, attachments)
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result = obj.save_attachments(attachments, User.current)
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obj.attach_saved_attachments
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result
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end
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def self.latest_attach(attachments, filename)
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attachments.sort_by(&:created_on).reverse.detect {
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|att| att.filename.downcase == filename.downcase
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}
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end
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def self.prune(age=1.day)
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attachments = Attachment.all(:conditions => ["created_on < ? AND (container_type IS NULL OR container_type = '')", Time.now - age])
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attachments.each(&:destroy)
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end
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private
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# Physically deletes the file from the file system
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def delete_from_disk!
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if disk_filename.present? && File.exist?(diskfile)
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File.delete(diskfile)
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end
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end
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def sanitize_filename(value)
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# get only the filename, not the whole path
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just_filename = value.gsub(/^.*(\\|\/)/, '')
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# Finally, replace invalid characters with underscore
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@filename = just_filename.gsub(/[\/\?\%\*\:\|\"\'<>]+/, '_')
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end
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# Returns an ASCII or hashed filename
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def self.disk_filename(filename)
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timestamp = DateTime.now.strftime("%y%m%d%H%M%S")
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ascii = ''
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if filename =~ %r{^[a-zA-Z0-9_\.\-]*$}
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ascii = filename
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else
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ascii = Digest::MD5.hexdigest(filename)
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# keep the extension if any
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ascii << $1 if filename =~ %r{(\.[a-zA-Z0-9]+)$}
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end
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while File.exist?(File.join(@@storage_path, "#{timestamp}_#{ascii}"))
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timestamp.succ!
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end
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"#{timestamp}_#{ascii}"
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end
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end
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