Initial commit

lib/peatio/cors/validations.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+# Provides CORS variables validation.
+module CORS::Validations
+  Error = Class.new(StandardError)
+
+  class << self
+    def validate_origins(origins)
+      if origins.include?('*') || origins.blank?
+        Rails.logger.info{ "WARNING: API_CORS_ORIGIN is set to '*'" }
+        return '*'
+      end
+      origins.split(',').each_with_object([]) do |origin, domains|
+        if origin.match?(/https?:\/\/([a-zA-Z0-9]+)(\.[a-zA-Z0-9]+)*(:^[0-9]*$+)?/)
+          domains << origin
+        else
+          raise CORS::Validations::Error, "Set right origin domain name instead of #{origin}"
+        end
+      end
+    end
+
+    def validate_max_age(max_age)
+      if max_age.present? && max_age.match?(/^[0-9]*$/)
+        max_age
+      else
+        Rails.logger.info{ 'WARNING: Incorect or missing API_CORS_MAX_AGE value. Using default value: 3600' }
+        '3600'
+      end
+    end
+  end
+end