[plt-scheme] bytes->request or equivalent?

Is there a bytes->request function hiding somewhere that could be used
for testing? The only thing I can find to create a request requires a
connection. I'd like to do something like:

(define req
  (bytes->request #"GET /path/to/something HTTP/1.1\r\nHost:
www.foo.com\r\nCookie: abc=123; xyz=hello\r\n"))

and have it produce a request structure. (I'd be willing to pass in
more stuff if I had to.)

Todd