http: add weak_ptr to Request in Response

include/opendht/http.h

@@ -202,12 +202,15 @@ private:
     std::shared_ptr<dht::Logger> logger_;
 };
 
+class Request;
+
 struct Response
 {
     unsigned int status_code {0};
     std::map<std::string, std::string> headers;
     std::string body;
     bool aborted {false};
+    std::weak_ptr<Request> request;
 };
 
 class OPENDHT_PUBLIC Request : public std::enable_shared_from_this<Request>

src/http.cpp

@@ -694,6 +694,8 @@ Request::notify_state_change(State state) {
 void
 Request::init_parser()
 {
+    response_.request = shared_from_this();
+
     if (!parser_)
         parser_ = std::make_unique<http_parser>();
     http_parser_init(parser_.get(), HTTP_RESPONSE);