went through entire function and found below issues

[iamitprakash]

          went through entire function and found below issues

1. This function returns a function with three return values. But your handleMiddlewareResponse only returns two values.
2. use below code to parsing cookies from the header.

header := http.Header{}
for k, v := range req.Headers {
	header.Set(k, v)
}
reqCookies := header["Cookie"]

3. You are ignoring the error here. If LoadEnvConfig() fails, it might return empty/default config which could result in missing cookieName.

Originally posted by @iamitprakash in #157 (comment)