[Cgicc-help] Why is not "\r\n\r\n" but "\n\n" for end of http header?

[易剑]

Why is not "\r\n\r\n" but "\n\n" for end of http header?

void 

cgicc::HTTPContentHeader::render(std::ostream& out) const

{

  out << "Content-Type: " << getData() << std::endl;

  

  std::vector<HTTPCookie>::const_iterator iter; 

  for(iter = getCookies().begin(); iter != getCookies().end(); ++iter)

    out << *iter << std::endl; // "\r\n"

  

  out << std::endl; // "\r\n"

}