Fixes attachment_fu uploading problems on windows, see http://epirsch…

….blogspot.com/2008/01/fixing-attachmentfu-on-windows-like.html

engine_config/initializers/attachment_fu_patch.rb

@@ -0,0 +1,54 @@
+require 'tempfile'
+class Tempfile
+  # Returns the size of the temporary file.  As a side effect, the IO
+  # buffer is flushed before determining the size.
+  def size
+    if @tmpfile
+      @tmpfile.fsync
+      @tmpfile.flush
+      @tmpfile.stat.size
+    else
+      0
+    end
+  end
+end
+
+require 'technoweenie/attachment_fu/backends/s3_backend'
+module Technoweenie
+  module AttachmentFu
+    module Backends
+      module S3Backend
+        protected
+        def save_to_storage
+          if save_attachment?
+            S3Object.store(
+              full_filename,
+              (temp_path ? File.open(temp_path, "rb") : temp_data),
+              bucket_name,
+              :content_type => content_type,
+              :access => attachment_options[:s3_access]
+            )
+          end
+
+          @old_filename = nil
+          true
+        end
+      end
+    end
+  end
+end
+
+module Technoweenie
+  module AttachmentFu
+    # Gets the data from the latest temp file.  This will read the file into memory.
+    def temp_data
+      if save_attachment?
+        f = File.new( temp_path )
+        f.binmode
+        return f.read
+      else
+        return nil
+      end
+    end
+  end
+end