Do not try to rewind the body of a GET request, which doesn't have one

Author: shamess

ruby/lib/umbra.rb

@@ -59,6 +59,8 @@ def reset!
     private
 
     def request_body(env)
+      return nil unless env.key?("rack.input")
+
       io = env.fetch("rack.input")
       io.rewind
       body = io.read

ruby/spec/integration_spec.rb

@@ -39,7 +39,7 @@ def publish(channel, message)
     expect(redis.messages.count).to eq(1)
   end
 
-  fit "publishes the expected protobuf message" do
+  it "publishes the expected protobuf message" do
     post "/", "request-body"
 
     sleep(0.1)