From f301f399937f9ff62dc41a9cd8e1ea45b43baa6b Mon Sep 17 00:00:00 2001
From: Eric Wong <normalperson@yhbt.net>
Date: Thu, 12 Nov 2009 13:32:56 -0800
Subject: Split out Params and StatusMethods

StatusMethods will be reusable in subclasses like the
UprStatus ActiveRecord class.  Params parsing will be
common to both InputWrapper and also to the upcoming
Streaming class.
---
 lib/upr.rb                |  1 +
 lib/upr/input_wrapper.rb  | 11 ++++-------
 lib/upr/params.rb         | 23 +++++++++++++++++++++++
 lib/upr/status.rb         | 11 ++---------
 lib/upr/status_methods.rb | 12 ++++++++++++
 5 files changed, 42 insertions(+), 16 deletions(-)
 create mode 100644 lib/upr/params.rb
 create mode 100644 lib/upr/status_methods.rb

diff --git a/lib/upr.rb b/lib/upr.rb
index e1fc4c0..151e3a8 100644
--- a/lib/upr.rb
+++ b/lib/upr.rb
@@ -8,6 +8,7 @@ module Upr
   VERSION = '0.1.0'
 
   autoload :Monitor, 'upr/monitor'
+  autoload :Params, 'upr/params'
   autoload :InputWrapper, 'upr/input_wrapper'
 
   # Initializes a new instance of Upr::InputWrapper.  Usage in config.ru:
diff --git a/lib/upr/input_wrapper.rb b/lib/upr/input_wrapper.rb
index 2070d38..5268498 100644
--- a/lib/upr/input_wrapper.rb
+++ b/lib/upr/input_wrapper.rb
@@ -9,6 +9,8 @@ module Upr
                                   :input, :pos, :seen, :content_length,
                                   :upload_id, :mtime)
 
+    include Params
+
     def initialize(app, options = {})
       super(app,
             Array(options[:path_info] || nil),
@@ -38,12 +40,7 @@ module Upr
         length = env["CONTENT_LENGTH"] and length = length.to_i
         env["TRANSFER_ENCODING"] =~ %r{\Achunked\z}i and length = nil
         if length.nil? || length > 0
-          req = Rack::Request.new(env)
-
-          # can't blindly parse params here since we don't want to read
-          # the POST body if there is one, so only parse stuff in the
-          # query string...
-          if uid = req.GET["upload_id"]
+          if uid = extract_upload_id(env)
             return dup._call(env, uid, length)
           end
         end
@@ -52,7 +49,7 @@ module Upr
     end
 
     def _call(env, uid, length)
-      self.upload_id = env["upr.upload_id"] = uid
+      self.upload_id = uid
       self.mtime = self.pos = self.seen = 0
       self.input = env["rack.input"]
       env["rack.input"] = self
diff --git a/lib/upr/params.rb b/lib/upr/params.rb
new file mode 100644
index 0000000..3babdc0
--- /dev/null
+++ b/lib/upr/params.rb
@@ -0,0 +1,23 @@
+require 'rack'
+
+module Upr
+
+  module Params
+
+    # we'll add compatibility for existing upload progress modules
+    # we find here, but under no circumstances will we help
+    # proliferate new and subtly incompatible mechanisms.
+    # X-Progress-ID is used in both lighttpd and nginx (3rd party module)
+    # "upload_id" is used by mongrel_upload_progress
+    def extract_upload_id(env)
+      upid = env['HTTP_X_PROGRESS_ID'] and return upid
+
+      # can't blindly parse params here since we don't want to read
+      # the POST body if there is one, so only parse stuff in the
+      # query string...
+      params = Rack::Request.new(env).GET
+      env["upr.upload_id"] = params["X-Progress-ID"] || params["upload_id"]
+    end
+
+  end
+end
diff --git a/lib/upr/status.rb b/lib/upr/status.rb
index e3bb356..443933a 100644
--- a/lib/upr/status.rb
+++ b/lib/upr/status.rb
@@ -1,15 +1,8 @@
+require 'upr/status_methods'
 module Upr
 
   # this is what we store in the Moneta-backed monitor
   class Status < Struct.new(:seen, :length)
-
-    def error?
-      seen == -1
-    end
-
-    def done?
-      length && seen >= length
-    end
-
+    include StatusMethods
   end
 end
diff --git a/lib/upr/status_methods.rb b/lib/upr/status_methods.rb
new file mode 100644
index 0000000..e82a0f0
--- /dev/null
+++ b/lib/upr/status_methods.rb
@@ -0,0 +1,12 @@
+module Upr
+  # mixin module for both Upr::Status and UprStatus (AR example module)
+  module StatusMethods
+    def error?
+      seen < 0
+    end
+
+    def done?
+      length && seen >= length
+    end
+  end
+end
-- 
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