Problem:
Currently,~HttpHandler(),Close(),killTimer(), anderase() can propagate exceptions through destructors or cleanup code.
This violates safe C++ practices because throwing exceptions from destructors is undefined behavior if another exception is already active (stack unwinding). In addition, placement new or STL container operations (likestd::deque::push_back) can throw, which might escape through the destructor.

This is flagged by static analyzers and linters as a critical issue: destructors must not throw. Even if the code works most of the time, a single allocation failure or exception in a callback can terminate the program unexpectedly.

Potential call stack where exceptions can propagate:

~HttpHandler() └─ Close()     └─ closeFile()         └─ killTimer()             └─ runInLoop(lambda)                 └─ queueInLoop()                     └─ postEvent()                         └─ customEvents.push(ev)  <-- std::length_error or other exceptions

There are 3 potential fixes, (I am suggesting the first one):

1. ~HttpHandler() now wrapsClose() in atry/catch to silently swallow any exceptions.
2. Close() andkillTimer() are markednoexcept and all potentially throwing operations are wrapped intry/catch.

voidHttpHandler::killTimer(TimerID timerID)noexcept {runInLoop([timerID,this]()noexcept {try {auto iter = timers.find(timerID);if (iter != timers.end()) {htimer_del(iter->second->timer);                timers.erase(iter);            }        }catch (...) {// exceptions swallowed safely        }    });}

3. Replace placement new with move assignment, which isnoexcept if move constructor isnoexcept.
   Guarantees no exceptions propagate from erase.

size_type erase(const Key& key) {    for (auto it = this->begin(); it != this->end(); ++it) {        if (it->first == key) {            for (auto moveIt = it; moveIt + 1 != this->end(); ++moveIt) {                *moveIt = std::move(*(moveIt + 1));            }            Container::pop_back();            return 1;        }    }    return 0;}

This guarantees that destructors and cleanup routines cannot throw, satisfying the C++ Core Guidelines rule:C.64: Destructors should be noexcept
.