fix auto image sizes, make default helpers first feature

lib/middleman/features.rb

@@ -25,10 +25,10 @@ module Middleman
 end
 
 # livereload
-%w(asset_host 
+%w(default_helpers
+   asset_host 
    automatic_image_sizes
    cache_buster
-   default_helpers
    minify_css
    minify_javascript
    relative_assets

lib/middleman/features/automatic_image_sizes.rb

@@ -2,8 +2,8 @@ class Middleman::Features::AutomaticImageSizes
   def initialize(app, config)
     require "middleman/features/automatic_image_sizes/fastimage"
 
-    Middleman::Server.send :alias_method, :pre_automatic_image_tag, :image_tag
     Middleman::Server.helpers do
+      alias_method :pre_automatic_image_tag, :image_tag
       def image_tag(path, params={})
         if (!params[:width] || !params[:height]) && !path.include?("://")
           params[:alt] ||= ""
@@ -12,7 +12,7 @@ class Middleman::Features::AutomaticImageSizes
           begin
             real_path = File.join(settings.public, settings.images_dir, path)
             if File.exists? real_path
-              dimensions = Middleman::FastImage.size(real_path, :raise_on_failure => true)
+              dimensions = ::FastImage.size(real_path, :raise_on_failure => true)
               params[:width]  ||= dimensions[0]
               params[:height] ||= dimensions[1]
             end

lib/middleman/features/automatic_image_sizes/fastimage.rb

@@ -32,7 +32,6 @@
 require 'net/https'
 require 'open-uri'
 
-module Middleman
 class FastImage
   attr_reader :size, :type
 
@@ -137,16 +136,22 @@ module Middleman
     @property = options[:type_only] ? :type : :size
     @timeout = options[:timeout] || DefaultTimeout
     @uri = uri
-      @parsed_uri = URI.parse(uri.gsub(/\s/, "%20"))
+    begin
+      @parsed_uri = URI.parse(uri)
+    rescue URI::InvalidURIError
+      fetch_using_open_uri
+    else
       if @parsed_uri.scheme == "http" || @parsed_uri.scheme == "https"
         fetch_using_http
       else
         fetch_using_open_uri
       end
+    end
     raise SizeNotFound if options[:raise_on_failure] && @property == :size && !@size
-    rescue Timeout::Error, SocketError, Errno::ECONNREFUSED, Errno::EHOSTUNREACH, Errno::ECONNRESET, ImageFetchFailure
+  rescue Timeout::Error, SocketError, Errno::ECONNREFUSED, Errno::EHOSTUNREACH, Errno::ECONNRESET, 
+    ImageFetchFailure, Net::HTTPBadResponse, EOFError, Errno::ENOENT
     raise ImageFetchFailure if options[:raise_on_failure]
-    rescue Errno::ENOENT
+  rescue NoMethodError  # 1.8.7p248 can raise this due to a net/http bug
     raise ImageFetchFailure if options[:raise_on_failure]
   rescue UnknownImageType
     raise UnknownImageType if options[:raise_on_failure]
@@ -198,6 +203,7 @@ module Middleman
 
   def parse_size
     @type = parse_type unless @type
+    @strpos = 0
     send("parse_size_for_#{@type}")
   end
 
@@ -237,11 +243,11 @@ module Middleman
   end
 
   def parse_size_for_gif
-      get_chars(9)[4..8].unpack('SS')
+    get_chars(11)[6..10].unpack('SS')
   end
 
   def parse_size_for_png
-      get_chars(23)[14..22].unpack('NN')
+    get_chars(25)[16..24].unpack('NN')
   end
 
   def parse_size_for_jpeg
@@ -275,8 +281,7 @@ module Middleman
   end
 
   def parse_size_for_bmp
-      d = get_chars(27)[12..26]
-      d[0] == 40 ? d[4..-1].unpack('LL') : d[4..8].unpack('SS')
-    end
+    d = get_chars(29)[14..28]
+    d.unpack("C")[0] == 40 ? d[4..-1].unpack('LL') : d[4..8].unpack('SS')
   end
 end