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r3660:f08b2a394d73
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1 1 # redMine - project management software
2 2 # Copyright (C) 2006-2007 Jean-Philippe Lang
3 3 #
4 4 # This program is free software; you can redistribute it and/or
5 5 # modify it under the terms of the GNU General Public License
6 6 # as published by the Free Software Foundation; either version 2
7 7 # of the License, or (at your option) any later version.
8 8 #
9 9 # This program is distributed in the hope that it will be useful,
10 10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 12 # GNU General Public License for more details.
13 13 #
14 14 # You should have received a copy of the GNU General Public License
15 15 # along with this program; if not, write to the Free Software
16 16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 17
18 18 require "digest/md5"
19 19
20 20 class Attachment < ActiveRecord::Base
21 21 belongs_to :container, :polymorphic => true
22 22 belongs_to :author, :class_name => "User", :foreign_key => "author_id"
23 23
24 24 validates_presence_of :container, :filename, :author
25 25 validates_length_of :filename, :maximum => 255
26 26 validates_length_of :disk_filename, :maximum => 255
27 27
28 28 acts_as_event :title => :filename,
29 29 :url => Proc.new {|o| {:controller => 'attachments', :action => 'download', :id => o.id, :filename => o.filename}}
30 30
31 31 acts_as_activity_provider :type => 'files',
32 32 :permission => :view_files,
33 33 :author_key => :author_id,
34 34 :find_options => {:select => "#{Attachment.table_name}.*",
35 35 :joins => "LEFT JOIN #{Version.table_name} ON #{Attachment.table_name}.container_type='Version' AND #{Version.table_name}.id = #{Attachment.table_name}.container_id " +
36 36 "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 )"}
37 37
38 38 acts_as_activity_provider :type => 'documents',
39 39 :permission => :view_documents,
40 40 :author_key => :author_id,
41 41 :find_options => {:select => "#{Attachment.table_name}.*",
42 42 :joins => "LEFT JOIN #{Document.table_name} ON #{Attachment.table_name}.container_type='Document' AND #{Document.table_name}.id = #{Attachment.table_name}.container_id " +
43 43 "LEFT JOIN #{Project.table_name} ON #{Document.table_name}.project_id = #{Project.table_name}.id"}
44 44
45 45 cattr_accessor :storage_path
46 46 @@storage_path = "#{RAILS_ROOT}/files"
47 47
48 48 def validate
49 49 if self.filesize > Setting.attachment_max_size.to_i.kilobytes
50 50 errors.add(:base, :too_long, :count => Setting.attachment_max_size.to_i.kilobytes)
51 51 end
52 52 end
53 53
54 54 def file=(incoming_file)
55 55 unless incoming_file.nil?
56 56 @temp_file = incoming_file
57 57 if @temp_file.size > 0
58 58 self.filename = sanitize_filename(@temp_file.original_filename)
59 59 self.disk_filename = Attachment.disk_filename(filename)
60 60 self.content_type = @temp_file.content_type.to_s.chomp
61 61 if content_type.blank?
62 62 self.content_type = Redmine::MimeType.of(filename)
63 63 end
64 64 self.filesize = @temp_file.size
65 65 end
66 66 end
67 67 end
68 68
69 69 def file
70 70 nil
71 71 end
72 72
73 73 # Copies the temporary file to its final location
74 74 # and computes its MD5 hash
75 75 def before_save
76 76 if @temp_file && (@temp_file.size > 0)
77 77 logger.debug("saving '#{self.diskfile}'")
78 78 md5 = Digest::MD5.new
79 79 File.open(diskfile, "wb") do |f|
80 80 buffer = ""
81 81 while (buffer = @temp_file.read(8192))
82 82 f.write(buffer)
83 83 md5.update(buffer)
84 84 end
85 85 end
86 86 self.digest = md5.hexdigest
87 87 end
88 88 # Don't save the content type if it's longer than the authorized length
89 89 if self.content_type && self.content_type.length > 255
90 90 self.content_type = nil
91 91 end
92 92 end
93 93
94 94 # Deletes file on the disk
95 95 def after_destroy
96 96 File.delete(diskfile) if !filename.blank? && File.exist?(diskfile)
97 97 end
98 98
99 99 # Returns file's location on disk
100 100 def diskfile
101 101 "#{@@storage_path}/#{self.disk_filename}"
102 102 end
103 103
104 104 def increment_download
105 105 increment!(:downloads)
106 106 end
107 107
108 108 def project
109 109 container.project
110 110 end
111 111
112 112 def visible?(user=User.current)
113 113 container.attachments_visible?(user)
114 114 end
115 115
116 116 def deletable?(user=User.current)
117 117 container.attachments_deletable?(user)
118 118 end
119 119
120 120 def image?
121 121 self.filename =~ /\.(jpe?g|gif|png)$/i
122 122 end
123 123
124 124 def is_text?
125 125 Redmine::MimeType.is_type?('text', filename)
126 126 end
127 127
128 128 def is_diff?
129 129 self.filename =~ /\.(patch|diff)$/i
130 130 end
131 131
132 132 # Returns true if the file is readable
133 133 def readable?
134 134 File.readable?(diskfile)
135 135 end
136 136
137 137 # Bulk attaches a set of files to an object
138 138 #
139 139 # Returns a Hash of the results:
140 140 # :files => array of the attached files
141 141 # :unsaved => array of the files that could not be attached
142 142 def self.attach_files(obj, attachments)
143 143 attached = []
144 unsaved = []
145 144 if attachments && attachments.is_a?(Hash)
146 145 attachments.each_value do |attachment|
147 146 file = attachment['file']
148 147 next unless file && file.size > 0
149 148 a = Attachment.create(:container => obj,
150 149 :file => file,
151 150 :description => attachment['description'].to_s.strip,
152 151 :author => User.current)
153 152
154 153 if a.new_record?
155 154 obj.unsaved_attachments ||= []
156 155 obj.unsaved_attachments << a
157 156 else
158 157 attached << a
159 158 end
160 159 end
161 160 end
162 161 {:files => attached, :unsaved => obj.unsaved_attachments}
163 162 end
164 163
165 164 private
166 165 def sanitize_filename(value)
167 166 # get only the filename, not the whole path
168 167 just_filename = value.gsub(/^.*(\\|\/)/, '')
169 168 # NOTE: File.basename doesn't work right with Windows paths on Unix
170 169 # INCORRECT: just_filename = File.basename(value.gsub('\\\\', '/'))
171 170
172 171 # Finally, replace all non alphanumeric, hyphens or periods with underscore
173 172 @filename = just_filename.gsub(/[^\w\.\-]/,'_')
174 173 end
175 174
176 175 # Returns an ASCII or hashed filename
177 176 def self.disk_filename(filename)
178 177 timestamp = DateTime.now.strftime("%y%m%d%H%M%S")
179 178 ascii = ''
180 179 if filename =~ %r{^[a-zA-Z0-9_\.\-]*$}
181 180 ascii = filename
182 181 else
183 182 ascii = Digest::MD5.hexdigest(filename)
184 183 # keep the extension if any
185 184 ascii << $1 if filename =~ %r{(\.[a-zA-Z0-9]+)$}
186 185 end
187 186 while File.exist?(File.join(@@storage_path, "#{timestamp}_#{ascii}"))
188 187 timestamp.succ!
189 188 end
190 189 "#{timestamp}_#{ascii}"
191 190 end
192 191 end
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