avoid nil errors

Gemfile

@@ -8,4 +8,4 @@ gem "sqlite3-ruby",   :require => 'sqlite3'
 gem "activerecord",   :git => "git://github.com/rails/rails", :require => "active_record"
 gem "activeresource", :git => "git://github.com/rails/rails", :require => "active_resource"
 gem "activesupport",  :git => "git://github.com/rails/rails", :require => "active_support"
-gem "paperclip",      :git => "git://github.com/thoughtbot/paperclip", :branch => "rails3"
+gem "paperclip"

lib/activeresource/base.rb

@@ -74,8 +74,9 @@ def has_encoded_attachment(name)
         changed = (changed.nil? || changed) ? true : false
         if file_url
           url = URI.parse(file_url.to_s)
+          send "#{name}_content_type=", MIME::Types.type_for(File.basename(url.path)).first.content_type
           send "#{name}=",              StringIO.new(connection.get_attachment(url.path,
-                                          'Accept' => send("#{name}_content_type")).body), changed
+                                          'Accept' => send("#{name}_content_type"))), changed
           send "#{name}_file_name=",    File.basename(url.path)
           send "#{name}_content_type=", MIME::Types.type_for(File.basename(url.path)).first.content_type
         else

lib/activeresource/connection.rb

@@ -1,8 +1,7 @@
 module EncodedAttachment
   module ActiveResourceConnectionMethods
     def get_attachment(path, headers = {})
-      request_headers = build_request_headers(headers, :get, self.site.merge(path))
-      with_auth { request(:get, path, request_headers) }
+      with_auth { request(:get, path, build_request_headers(headers, :get, self.site.merge(path))).body }
     end
   end
 end