Adds the HttpError exception - Fixes #792

lib/common/errors.rb

@@ -0,0 +1,27 @@
+
+# HTTP Error
+class HttpError < StandardError
+  attr_reader :response
+
+  # @param [ Typhoeus::Response ] res
+  def initialize(response)
+    @response = response
+  end
+
+  def failure_details
+    msg = response.effective_url
+    msg += response.code == 0 ? " (#{response.return_message})" : " (status: #{response.code})"
+    msg
+  end
+
+  def message
+    "HTTP Error: #{failure_details}"
+  end
+end
+
+# Used in the Updater
+class DownloadError < HttpError
+  def message
+    "Unable to get #{failure_details}"
+  end
+end