Fix #1848

httplib.h

@@ -2526,12 +2526,8 @@ inline std::string base64_encode(const std::string &in) {
 }
 
 inline bool is_file(const std::string &path) {
-#ifdef _WIN32
-  return _access_s(path.c_str(), 0) == 0;
-#else
   struct stat st;
   return stat(path.c_str(), &st) >= 0 && S_ISREG(st.st_mode);
-#endif
 }
 
 inline bool is_dir(const std::string &path) {