Scieneer Common Lisp 1.3.9 online documentation

http:request-body object[Generic Function]

Reader for the HTTP request body. If the request has a body, for example a POST request, then the body is read. The body is a octect byte vector. If the request has no body then return nil. If the content type is text then the body may be converted into a simple-string by the function http:request-body-string.