Returns a 404 error when trying to view/download an attachment that can't be read from disk.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2692 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/attachments_controller.rb

@@ -17,7 +17,7 @@
 
 class AttachmentsController < ApplicationController
   before_filter :find_project
-  before_filter :read_authorize, :except => :destroy
+  before_filter :file_readable, :read_authorize, :except => :destroy
   before_filter :delete_authorize, :only => :destroy
   
   verify :method => :post, :only => :destroy
@@ -64,6 +64,11 @@ private
     render_404
   end
   
+  # Checks that the file exists and is readable
+  def file_readable
+    @attachment.readable? ? true : render_404
+  end
+  
   def read_authorize
     @attachment.visible? ? true : deny_access
   end

app/models/attachment.rb

@@ -126,6 +126,11 @@ class Attachment < ActiveRecord::Base
     self.filename =~ /\.(patch|diff)$/i
   end
   
+  # Returns true if the file is readable
+  def readable?
+    File.readable?(diskfile)
+  end
+  
 private
   def sanitize_filename(value)
     # get only the filename, not the whole path

test/functional/attachments_controller_test.rb

@@ -23,8 +23,8 @@ class AttachmentsController; def rescue_action(e) raise e end; end
 
 
 class AttachmentsControllerTest < Test::Unit::TestCase
-  fixtures :users, :projects, :roles, :members, :enabled_modules, :issues, :attachments,
-           :versions, :wiki_pages, :wikis
+  fixtures :users, :projects, :roles, :members, :enabled_modules, :issues, :trackers, :attachments,
+           :versions, :wiki_pages, :wikis, :documents
   
   def setup
     @controller = AttachmentsController.new
@@ -84,6 +84,11 @@ class AttachmentsControllerTest < Test::Unit::TestCase
     assert_equal 'application/x-ruby', @response.content_type
   end
   
+  def test_download_missing_file
+    get :download, :id => 2
+    assert_response 404
+  end
+  
   def test_anonymous_on_private_private
     get :download, :id => 7
     assert_redirected_to '/login?back_url=http%3A%2F%2Ftest.host%2Fattachments%2Fdownload%2F7'