Fixed error when GET request and string value inside

Author: matwii

server_http.hpp

@@ -357,7 +357,15 @@ namespace SimpleWeb {
                     if(!ec) {
                         if(timeout_content>0)
                             timer->cancel();
-                        auto http_version=stof(request->http_version);
+                        float http_version;
+                        try {
+                            http_version=stof(request->http_version);
+                        }
+                        catch(const std::exception &e){
+                            if(exception_handler)
+                                exception_handler(e);
+                            return;
+                        }
 
                         auto range=request->header.equal_range("Connection");
                         for(auto it=range.first;it!=range.second;it++) {