#include #include #include #include #include #include using namespace std; struct Request{ string start_line; string method; string protocol; string path; string headers; map headers_map; string message; }; Request parse(const char * const & r); extern const char * const request; /************************************************ * class Router contains a map of all usable paths * associating each path to a function that returns * a response string. why associate a function and * not a string? * because with a function we can build up a * response string based on the request parameters * (not shown here) and use template files to construct * the response if we wanted to (also not done here in this example). * we could also have multiple maps or a map of maps, * associating not only the paths but also the method * of the request as well (GET, PUT, POST, DELETE, ETC) ************************************************/ class Router{ public: Router(){} void addPath(string path,functionf){ paths_map[path]=f; } map> paths_map; }; //routes functions string root(); string images(); string four_zero_four(); int main() { auto req = parse(request); cout<<"\n---start line---" <<"\nmethod: "<

Hello World

)"; } string images(){ return R"(HTTP/1.1 200 OK Content-Type: text/html; charset=utf-8 Content-Length: 42 Server: ChillPill_FreshServe/0.0.7 blank image

)"; } string four_zero_four(){ return R"(HTTP/1.1 404 Not Found Content-Type: text/html; charset=utf-8 Content-Length: 42 Server: ChillPill_FreshServe/0.0.7

Page not found 404

)"; } ///////////////////////////////////////////////// // This function parses a c string because // socket.h programs usually deal with c strings ////////////////////////////////////////////////// Request parse(const char * const & r){ const int length = strlen(r); int cursor = 0; function getline=[&](){ string line{}; while(cursor3) req.headers+=line; while(cursor>req.method>>req.path>>req.protocol; ss = stringstream(req.headers); string header, value; while(std::getline(ss, header, ':')){ ss>>value; int right = header.size()-1; while(header[right]==' '||header[right]==':') header = header.substr(0, right--); req.headers_map[header]=value; ss.ignore(100,'\n'); } return req; }(); } const char * const request = R"(GET / HTTP/1.1 User-Agent:Mozilla/4.0 )";

Http request and router - http server