Add BlobController, remove Refs#blob

app/controllers/blob_controller.rb

@@ -0,0 +1,62 @@
+# Controller for viewing a file's blame
+class BlobController < ApplicationController
+  # Thrown when given an invalid path
+  class InvalidPathError < StandardError; end
+
+  include RefExtractor
+  include Gitlab::Encode
+
+  layout "project"
+
+  before_filter :project
+
+  # Authorize
+  before_filter :add_project_abilities
+  before_filter :authorize_read_project!
+  before_filter :authorize_code_access!
+  before_filter :require_non_empty_project
+
+  before_filter :define_tree_vars
+
+  def show
+    if @tree.is_blob?
+      if @tree.text?
+        encoding = detect_encoding(@tree.data)
+        mime_type = encoding ? "text/plain; charset=#{encoding}" : "text/plain"
+      else
+        mime_type = @tree.mime_type
+      end
+
+      send_data(
+        @tree.data,
+        type: mime_type,
+        disposition: 'inline',
+        filename: @tree.name
+      )
+    else
+      not_found!
+    end
+  end
+
+  private
+
+  def define_tree_vars
+    @ref, @path = extract_ref(params[:id])
+
+    @id     = File.join(@ref, @path)
+    @repo   = @project.repo
+    @commit = CommitDecorator.decorate(@project.commit(@ref))
+
+    @tree = Tree.new(@commit.tree, @project, @ref, @path)
+    @tree = TreeDecorator.new(@tree)
+
+    raise InvalidPathError if @tree.invalid?
+
+    @hex_path = Digest::SHA1.hexdigest(@path)
+
+    @history_path = project_tree_path(@project, @id)
+    @logs_path    = logs_file_project_ref_path(@project, @ref, @path)
+  rescue NoMethodError, InvalidPathError
+    not_found!
+  end
+end