Fix string create crash when file does not exist

src/server/wsserver.cpp

@@ -8,6 +8,9 @@ sv::WSServer::WSServer(uint16_t port)
 {
     ws_thread_ = std::make_unique<std::thread>([this, port]() {
         crow::SimpleApp app;
+        {
+            std::lock_guard<std::mutex> lock(mtx_);
+
             app_ptr_ = (void*)&app;
 
             CROW_WEBSOCKET_ROUTE(app, "/ws")
@@ -45,7 +48,6 @@ sv::WSServer::WSServer(uint16_t port)
 
                     WSConnId conn_id = static_cast<uint32_t>(reinterpret_cast<uintptr_t>(conn.userdata()));
                     events_.emplace_back(WSE_MESSAGE, conn_id, data);
-
                 });
 
             // CROW_ROUTE(app, "/")
@@ -55,19 +57,20 @@ sv::WSServer::WSServer(uint16_t port)
             //     auto page = crow::mustache::load("ws.html");
             //     return page.render(x);
             // });
+        }
 
         app.port(port).run();
 
-        // push exit event
         std::lock_guard<std::mutex> lock(mtx_);
+
+        // push exit event
         events_.emplace_back(WSE_EXIT);
 
         app_ptr_ = nullptr;
-
     });
 }
 
-bool sv::WSServer::PollEvent(WSEvent &out_event)
+bool sv::WSServer::PollEvent(WSEvent& out_event)
 {
     std::lock_guard<std::mutex> lock(mtx_);
 
@@ -86,12 +89,11 @@ void sv::WSServer::Send(WSConnId conn_id, std::string data)
     auto it = id2conn_.find(conn_id);
     if (it == id2conn_.end())
     {
-        std::cerr << "attempted to send message to unknown conn ID " << conn_id <<std::endl;
+        std::cerr << "attempted to send message to unknown conn ID " << conn_id << std::endl;
         return;
     }
 
     (*it->second).send_binary(std::move(data));
-
 }
 
 void sv::WSServer::Exit()
@@ -103,6 +105,7 @@ void sv::WSServer::Exit()
 
 sv::WSServer::~WSServer()
 {
+    Exit();
     if (ws_thread_ && ws_thread_->joinable())
         ws_thread_->join();
 }

src/utils/files_server.cpp

@@ -1,10 +1,15 @@
 #include "files.hpp"
 
 #include <fstream>
+#include <format>
 
 std::string fs::ReadFileAsString(const std::string& path)
 {
     std::ifstream t(path, std::ios::binary);
+
+    if (!t)
+        throw std::runtime_error(std::format("File not found: {}", path));
+
     t.seekg(0, std::ios::end);
     size_t size = t.tellg();
     std::string buffer(size, ' ');