Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Returns true if the message
has keep-alive connection semantics.
bool keep_alive() const;
This function always returns false
if need_eof would return false.
The return value is undefined unless is_header_done would return true.