I add support for RubyGems.org API and update rack to 1.4.1

Gemfile

@@ -1,2 +1,2 @@
-source "http://gems.simplesideias.com.br"
+source "http://rubygems.org"
 gem "rack", ">= 1.0.0"

Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
-  remote: http://gems.simplesideias.com.br/
+  remote: http://rubygems.org/
   specs:
-    rack (1.2.2)
+    rack (1.4.1)
 
 PLATFORMS
   ruby

rubygems_proxy.rb

@@ -24,7 +24,12 @@ def run
     when "/"
       [200, {"Content-Type" => "text/html"}, [erb(:index)]]
     else
-      [200, {"Content-Type" => "application/octet-stream"}, [contents]]
+      if env["QUERY_STRING"].empty?
+        [200, {"Content-Type" => "application/octet-stream"}, [contents]]
+      else
+        # add for query
+        [200, {"Content-Type" => "application/octet-stream"}, [query]]
+      end
     end
   rescue Exception
     [200, {"Content-Type" => "text/html"}, [erb(404)]]
@@ -99,6 +104,23 @@ def contents
     open(filepath).read
   end
 
+  # add for query
+  def query
+    logger.info "Query from interwebz: #{api_url}"
+    open(api_url).read
+  rescue Exception => error
+    # Just try to load from file if something goes wrong.
+    # This includes HTTP timeout, or something.
+    # If it fails again, we won't have any files anyway!
+    logger.error "Error: #{error.class} => #{error.message}"
+    open(filepath).read
+  end
+
+  # the query url
+  def api_url
+    File.join("http://rubygems.org", env["PATH_INFO"] + '?' + env["QUERY_STRING"])
+  end
+
   def save(contents)
     FileUtils.mkdir_p File.dirname(filepath)
     File.open(filepath, "wb") {|handler| handler << contents}