Wasm (#36)

* compile with wasm

* pack into qrc

* disable colorized msg for browser and cmd.exe

* run lua in wasm

* run the game

* font & pixmap anim

* special init page for web

* doc for compile wasm

CMakeLists.txt

@@ -2,8 +2,10 @@ cmake_minimum_required(VERSION 3.16)
 
 project(FreeKill VERSION 0.0.1)
 
+if (NOT ${CMAKE_SYSTEM_NAME} MATCHES "Emscripten")
 include_directories(fkparse/src)
 add_subdirectory(fkparse)
+endif ()
 
 find_package(Qt6 REQUIRED COMPONENTS
   Gui
@@ -31,15 +33,38 @@ include_directories(src/network)
 include_directories(src/server)
 include_directories(src/ui)
 
+if (${CMAKE_SYSTEM_NAME} MATCHES "Emscripten")
+# Fix include problem
+include_directories("/usr/include/openssl-1.1/")
+endif()
+
 file(GLOB SWIG_FILES "${PROJECT_SOURCE_DIR}/src/swig/*.i")
+if (${CMAKE_SYSTEM_NAME} MATCHES "Emscripten")
+  set(SWIG_SOURCE ${PROJECT_SOURCE_DIR}/src/swig/freekill-wasm.i)
+else ()
+  set(SWIG_SOURCE ${PROJECT_SOURCE_DIR}/src/swig/freekill.i)
+endif ()
+
 add_custom_command(
   OUTPUT ${PROJECT_SOURCE_DIR}/src/swig/freekill-wrap.cxx
   DEPENDS ${SWIG_FILES}
   COMMENT "Generating freekill-wrap.cxx"
   COMMAND swig -c++ -lua -Wall -o
     ${PROJECT_SOURCE_DIR}/src/swig/freekill-wrap.cxx
-    ${PROJECT_SOURCE_DIR}/src/swig/freekill.i
+    ${SWIG_SOURCE}
 )
 
 qt_add_executable(FreeKill)
+
+if (${CMAKE_SYSTEM_NAME} MATCHES "Emscripten")
+file(GLOB_RECURSE FK_RESOURCE_FILES
+  RELATIVE ${PROJECT_SOURCE_DIR}
+  *.lua *.qml *.js *.png *.jpg *.mp3
+)
+list(APPEND FK_RESOURCE_FILES "fonts/FZLBGBK.ttf")
+qt_add_resources(FreeKill "qrc"
+  PREFIX "/"
+  FILES ${FK_RESOURCE_FILES}
+)
+endif()
 add_subdirectory(src)

doc/dev/compile.md

@@ -91,3 +91,30 @@ ___
 ## 编译安卓版
 
 用Qt安装器装好Android库，然后配置一下android-sdk就能编译了。
+
+___
+
+## WASM下编译
+
+WASM大概就是能在浏览器中跑C++。编译用Qt Creator即可。
+
+### 1. 条件与局限性
+
+如果程序运行在网页上的话，那么理应只有客户端，然后提供网页的服务器上自然也运行着一个后端服务器。所以说在编译时应该舍弃掉服务端相关的代码。因此依赖库就不再需要sqlite3。
+
+总之是编译个纯客户端的FK。
+
+### 2. 编译OpenSSL
+
+进入OpenSSL的src目录，然后
+
+    $ ./config -no-asm -no-engine -no-dso
+    $ emmake make -j8 build_generated libssl.a libcrypto.a
+
+编译Lua的话直接emmake make就行了，总之库已经传到仓库了。
+
+### 3. 部署资源文件
+
+由于CMake中`file(GLOB_RECURSE)`所带来的缺陷，每当资源文件变动时，需要手动更新。
+
+把构建目录中的.rcc目录删掉然后重新执行CMake->make即可。每次编译资源文件总要消耗相当多的时间。

qml/Pages/RoomElement/PixmapAnimation.qml

@@ -1,5 +1,4 @@
 import QtQuick
-import Qt.labs.folderlistmodel
 import "../skin-bank.js" as SkinBank
 
 Item {
@@ -18,12 +17,8 @@ Item {
   width: childrenRect.width
   height: childrenRect.height
 
-  FolderListModel {
+  property string folder: SkinBank.PIXANIM_DIR + source
-    id: fileModel
+  property int fileModel
-    folder: SkinBank.PIXANIM_DIR + source
-    nameFilters: ["*.png"]
-    showDirs: false
-  }
 
   Repeater {
     id: frames
@@ -35,7 +30,7 @@ Item {
       onStatusChanged: {
         if (status == Image.Ready) {
           loadedFrameCount++;
-          if (loadedFrameCount == fileModel.count)
+          if (loadedFrameCount == fileModel)
             root.loaded();
         }
       }
@@ -52,8 +47,8 @@ Item {
     interval: 50
     repeat: true
     onTriggered: {
-      if (currentFrame >= fileModel.count) {
+      if (currentFrame >= fileModel) {
-        frames.itemAt(fileModel.count - 1).visible = false;
+        frames.itemAt(fileModel - 1).visible = false;
         if (loop) {
           currentFrame = 0;
         } else {
@@ -73,7 +68,7 @@ Item {
 
   function start()
   {
-    if (loadedFrameCount == fileModel.count) {
+    if (loadedFrameCount == fileModel) {
       timer.start();
     } else {
       root.loaded.connect(function(){
@@ -86,4 +81,8 @@ Item {
   {
     timer.stop();
   }
+
+  Component.onCompleted: {
+    fileModel = Backend.ls(folder).length;
+  }
 }

qml/Pages/RoomLogic.js

@@ -170,7 +170,14 @@ function moveCards(moves) {
 }
 
 function setEmotion(id, emotion) {
-  let path = (SkinBank.PIXANIM_DIR + emotion).replace("file://", "");
+  let path;
+  if (OS === "Win") {
+    // Windows: file:/C:/xxx/xxxx
+    path = (SkinBank.PIXANIM_DIR + emotion).replace("file:/", "");
+  } else {
+    path = (SkinBank.PIXANIM_DIR + emotion).replace("file://", "");
+  }
+
   if (!Backend.exists(path)) {
     return;
   }

qml/Pages/WebInit.qml

@@ -0,0 +1,61 @@
+import QtQuick
+import QtQuick.Controls
+
+Item {
+  id: root
+  scale: 2
+
+  // Change this to your server's IP or domain name
+  property string server_addr: "127.0.0.1:9530"
+
+  Frame {
+    id: join_server
+    anchors.centerIn: parent
+    background: Rectangle {
+      color: "#88888888"
+      radius: 2
+    }
+    
+    Column {
+      spacing: 8
+      TextField {
+        id: screenNameEdit
+        text: "player"
+        onTextChanged: {
+          passwordEdit.text = "";
+          let data = config.savedPassword[server_addr.editText];
+          if (data) {
+            if (text === data.username) {
+              passwordEdit.text = data.shorten_password;
+            }
+          }
+        }
+      }
+      TextField {
+        id: passwordEdit
+        text: ""
+        echoMode: TextInput.Password
+        passwordCharacter: "*"
+      }
+      Button {
+        text: "Login"
+        enabled: passwordEdit.text !== ""
+        onClicked: {
+          config.serverAddr = server_addr;
+          config.screenName = screenNameEdit.text;
+          config.password = passwordEdit.text;
+          mainWindow.busy = true;
+          Backend.joinServer(server_addr);
+        }
+      }
+    }
+  }
+
+  Component.onCompleted: {
+    config.loadConf();
+
+    let data = config.savedPassword[config.lastLoginServer];
+    screenNameEdit.text = data.username;
+    passwordEdit.text = data.shorten_password;
+  }
+}

qml/main.qml

@@ -37,11 +37,12 @@ Item {
   StackView {
     id: mainStack
     visible: !mainWindow.busy
-    initialItem: init
+    initialItem: OS !== "Web" ? init : webinit
     anchors.fill: parent
   }
 
   Component { id: init; Init {} }
+  Component { id: webinit; WebInit {} }
   Component { id: lobby; Lobby {} }
   Component { id: generalsOverview; GeneralsOverview {} }
   Component { id: cardsOverview; CardsOverview {} }
@@ -152,7 +153,7 @@ Item {
   }
 
   Component.onCompleted: {
-    if (!Android) {
+    if (OS !== "Android" && OS !== "Web") {
       width = config.winWidth;
       height = config.winHeight;
     }

src/CMakeLists.txt

@@ -28,6 +28,7 @@ set(freekill_HEADERS
   "ui/qmlbackend.h"
 )
 
+set(FKP_LIB fkparse)
 if (WIN32)
   set(LUA_LIB ${PROJECT_SOURCE_DIR}/lib/win/lua54.dll)
   set(SQLITE3_LIB ${PROJECT_SOURCE_DIR}/lib/win/sqlite3.dll)
@@ -40,6 +41,19 @@ elseif (ANDROID)
     QT_ANDROID_PACKAGE_SOURCE_DIR ${PROJECT_SOURCE_DIR}/android
     QT_ANDROID_EXTRA_LIBS "${LUA_LIB};${SQLITE3_LIB};${CRYPTO_LIB}"
   )
+elseif (${CMAKE_SYSTEM_NAME} MATCHES "Emscripten")
+  # WASM
+  list(REMOVE_ITEM freekill_SRCS
+    "network/server_socket.cpp"
+    #"network/client_socket.cpp"
+    #"network/router.cpp"
+    "server/server.cpp"
+    "server/serverplayer.cpp"
+    "server/room.cpp"
+  )
+  set(FKP_LIB "")
+  set(LUA_LIB ${PROJECT_SOURCE_DIR}/lib/wasm/liblua.a)
+  set(CRYPTO_LIB ${PROJECT_SOURCE_DIR}/lib/wasm/libcrypto.a)
 else ()
   set(LUA_LIB lua5.4)
   set(SQLITE3_LIB sqlite3)
@@ -57,7 +71,7 @@ target_link_libraries(FreeKill PRIVATE
   ${SQLITE3_LIB}
   ${CRYPTO_LIB}
   ${READLINE_LIB}
-  fkparse
+  ${FKP_LIB}
   Qt6::Qml
   Qt6::Gui
   Qt6::Widgets

src/core/util.cpp

@@ -61,6 +61,7 @@ void Dumpstack(lua_State *L)
   }
 }
 
+#ifndef Q_OS_WASM
 sqlite3 *OpenDatabase(const QString &filename)
 {
   sqlite3 *ret;
@@ -151,6 +152,7 @@ RSA *InitServerRSA() {
   fclose(keyFile);
   return rsa;
 }
+#endif
 
 static void writeFileMD5(QFile &dest, const QString &fname) {
   QFile f(fname);

src/core/util.h

@@ -6,6 +6,7 @@
 lua_State *CreateLuaState();
 bool DoLuaScript(lua_State *L, const char *script);
 
+#ifndef Q_OS_WASM
 sqlite3 *OpenDatabase(const QString &filename = "./server/users.db");
 QJsonObject SelectFromDatabase(sqlite3 *db, const QString &sql);
 // For Lua
@@ -14,6 +15,7 @@ void ExecSQL(sqlite3 *db, const QString &sql);
 void CloseDatabase(sqlite3 *db);
 
 RSA *InitServerRSA();
+#endif
 
 QString calcFileMD5();
 

src/main.cpp

@@ -1,5 +1,7 @@
 #include "qmlbackend.h"
+#ifndef Q_OS_WASM
 #include "server.h"
+#endif
 
 #if defined(Q_OS_LINUX) && !defined(Q_OS_ANDROID)
 #include "shell.h"
@@ -11,8 +13,9 @@
 
 #include <QSplashScreen>
 #include <QScreen>
+#include <QFileDialog>
 
-#ifdef Q_OS_ANDROID
+#if defined(Q_OS_ANDROID) || defined(Q_OS_WASM)
 static bool copyPath(const QString &srcFilePath, const QString &tgtFilePath)
 {
   QFileInfo srcFileInfo(srcFilePath);
@@ -48,19 +51,19 @@ void fkMsgHandler(QtMsgType type, const QMessageLogContext &context, const QStri
   auto threadName = QThread::currentThread()->objectName().toLatin1().constData();
   switch (type) {
   case QtDebugMsg:
-    fprintf(stderr, "[%s/\e[1;30mDEBUG\e[0m] %s\n", threadName, localMsg.constData());
+    fprintf(stderr, "[%s/DEBUG] %s\n", threadName, localMsg.constData());
     break;
   case QtInfoMsg:
-    fprintf(stderr, "[%s/\e[1;32mINFO\e[0m] %s\n", threadName, localMsg.constData());
+    fprintf(stderr, "[%s/INFO] %s\n", threadName, localMsg.constData());
     break;
   case QtWarningMsg:
-    fprintf(stderr, "[%s/\e[1;33mWARNING\e[0m] %s\n", threadName, localMsg.constData());
+    fprintf(stderr, "[%s/WARNING] %s\n", threadName, localMsg.constData());
     break;
   case QtCriticalMsg:
-    fprintf(stderr, "[%s/\e[1;31mCRITICAL\e[0m] %s\n", threadName, localMsg.constData());
+    fprintf(stderr, "[%s/CRITICAL] %s\n", threadName, localMsg.constData());
     break;
   case QtFatalMsg:
-    fprintf(stderr, "[%s/\e[1;31mFATAL\e[0m] %s\n", threadName, localMsg.constData());
+    fprintf(stderr, "[%s/FATAL] %s\n", threadName, localMsg.constData());
     break;
   }
 }
@@ -73,6 +76,7 @@ int main(int argc, char *argv[])
   QCoreApplication::setApplicationName("FreeKill");
   QCoreApplication::setApplicationVersion("Alpha 0.0.1");
 
+#ifndef Q_OS_WASM
   QCommandLineParser parser;
   parser.setApplicationDescription("FreeKill server");
   parser.addHelpOption();
@@ -105,6 +109,9 @@ int main(int argc, char *argv[])
     }
     return app->exec();
   }
+#else
+  copyPath(":/", QDir::currentPath());
+#endif
 
   app = new QApplication(argc, argv);
 
@@ -132,19 +139,32 @@ int main(int argc, char *argv[])
   backend.setEngine(engine);
   
   engine->rootContext()->setContextProperty("Backend", &backend);
-  engine->rootContext()->setContextProperty("AppPath", QUrl::fromLocalFile(QDir::currentPath()));
+
 #ifdef QT_DEBUG
   bool debugging = true;
 #else
   bool debugging = false;
 #endif
   engine->rootContext()->setContextProperty("Debugging", debugging);
-#ifdef Q_OS_ANDROID
+
-  engine->rootContext()->setContextProperty("Android", true);
+
+  QString system;
+#if defined(Q_OS_ANDROID)
+  system = "Android";
+#elif defined(Q_OS_WASM)
+  system = "Web";
+#elif defined(Q_OS_WIN32)
+  system = "Win";
+#elif defined(Q_OS_LINUX)
+  system = "Linux";
 #else
-  engine->rootContext()->setContextProperty("Android", false);
+  system = "Other";
 #endif
+  engine->rootContext()->setContextProperty("OS", system);
+
+  engine->rootContext()->setContextProperty("AppPath", QUrl::fromLocalFile(QDir::currentPath()));
   engine->load("qml/main.qml");
+
   if (engine->rootObjects().isEmpty())
     return -1;
 

src/network/router.cpp

@@ -1,8 +1,10 @@
 #include "router.h"
 #include "client.h"
 #include "client_socket.h"
+#ifndef Q_OS_WASM
 #include "server.h"
 #include "serverplayer.h"
+#endif
 #include "util.h"
 
 Router::Router(QObject *parent, ClientSocket *socket, RouterType type)
@@ -13,7 +15,9 @@ Router::Router(QObject *parent, ClientSocket *socket, RouterType type)
   setSocket(socket);
   expectedReplyId = -1;
   replyTimeout = 0;
+#ifndef Q_OS_WASM
   extraReplyReadySemaphore = nullptr;
+#endif
 }
 
 Router::~Router()
@@ -44,14 +48,17 @@ void Router::setSocket(ClientSocket *socket)
   }
 }
 
+#ifndef Q_OS_WASM
 void Router::setReplyReadySemaphore(QSemaphore *semaphore)
 {
   extraReplyReadySemaphore = semaphore;
 }
+#endif
 
 void Router::request(int type, const QString& command,
            const QString& jsonData, int timeout)
 {
+#ifndef Q_OS_WASM
   // In case a request is called without a following waitForReply call
   if (replyReadySemaphore.available() > 0)
     replyReadySemaphore.acquire(replyReadySemaphore.available());
@@ -74,6 +81,7 @@ void Router::request(int type, const QString& command,
   body << timeout;
 
   emit messageReady(QJsonDocument(body).toJson(QJsonDocument::Compact));
+#endif
 }
 
 void Router::reply(int type, const QString& command, const QString& jsonData)
@@ -106,6 +114,7 @@ int Router::getTimeout() const
 // cancel last request from the sender
 void Router::cancelRequest()
 {
+#ifndef Q_OS_WASM
   replyMutex.lock();
   expectedReplyId = -1;
   replyTimeout = 0;
@@ -114,22 +123,28 @@ void Router::cancelRequest()
 
   if (replyReadySemaphore.available() > 0)
     replyReadySemaphore.acquire(replyReadySemaphore.available());
+#endif
 }
 
 QString Router::waitForReply()
 {
+#ifndef Q_OS_WASM
   replyReadySemaphore.acquire();
   return m_reply;
+#endif
 }
 
 QString Router::waitForReply(int timeout)
 {
+#ifndef Q_OS_WASM
   replyReadySemaphore.tryAcquire(1, timeout * 1000);
   return m_reply;
+#endif
 }
 
 void Router::abortRequest()
 {
+#ifndef Q_OS_WASM
   replyMutex.lock();
   if (expectedReplyId != -1) {
     replyReadySemaphore.release();
@@ -139,10 +154,12 @@ void Router::abortRequest()
     extraReplyReadySemaphore = nullptr;
   }
   replyMutex.unlock();
+#endif
 }
 
 void Router::handlePacket(const QByteArray& rawPacket)
 {
+#ifndef Q_OS_WASM
   static QMap<QString, void (*)(ServerPlayer *, const QString &)> lobby_actions;
   if (lobby_actions.size() <= 0) {
     lobby_actions["UpdateAvatar"] = [](ServerPlayer *sender, const QString &jsonData){
@@ -260,5 +277,28 @@ void Router::handlePacket(const QByteArray& rawPacket)
     locker.unlock();
     emit replyReady();
   }
+#else
+  QJsonDocument packet = QJsonDocument::fromJson(rawPacket);
+  if (packet.isNull() || !packet.isArray())
+    return;
+
+  int requestId = packet[0].toInt();
+  int type = packet[1].toInt();
+  QString command = packet[2].toString();
+  QString jsonData = packet[3].toString();
+
+  if (type & TYPE_NOTIFICATION) {
+    if (type & DEST_CLIENT) {
+      ClientInstance->callLua(command, jsonData);
+    }
+  } else if (type & TYPE_REQUEST) {
+    this->requestId = requestId;
+    this->requestTimeout = packet[4].toInt();
+
+    if (type & DEST_CLIENT) {
+      qobject_cast<Client *>(parent())->callLua(command, jsonData);
+    }
+  }
+#endif
 }
 

src/network/router.h

@@ -29,7 +29,9 @@ public:
   ClientSocket *getSocket() const;
   void setSocket(ClientSocket *socket);
 
+#ifndef Q_OS_WASM
   void setReplyReadySemaphore(QSemaphore *semaphore);
+#endif
 
   void request(int type, const QString &command,
               const QString &jsonData, int timeout);
@@ -66,8 +68,10 @@ private:
   int expectedReplyId;
   int replyTimeout;
   QString m_reply;    // should be json string
+#ifndef Q_OS_WASM
   QSemaphore replyReadySemaphore;
   QSemaphore *extraReplyReadySemaphore;
+#endif
 
   // Two Lua global table for callbacks and interactions
   // stored in the lua_State of the sender

src/swig/freekill-wasm.i

@@ -0,0 +1,15 @@
+%module fk
+
+%{
+#include "client.h"
+#include "serverplayer.h"
+#include "clientplayer.h"
+#include "room.h"
+#include "qmlbackend.h"
+#include "util.h"
+%}
+
+%include "naturalvar.i"
+%include "qt.i"
+%include "player.i"
+%include "client.i"

src/swig/player.i

@@ -34,22 +34,3 @@ public:
 };
 
 extern ClientPlayer *Self;
-
-%nodefaultctor ServerPlayer;
-%nodefaultdtor ServerPlayer;
-class ServerPlayer : public Player {
-public:
-  Server *getServer() const;
-  Room *getRoom() const;
-  void setRoom(Room *room);
-
-  void speak(const QString &message);
-
-  void doRequest(const QString &command,
-           const QString &json_data, int timeout);
-  QString waitForReply();
-  QString waitForReply(int timeout);
-  void doNotify(const QString &command, const QString &json_data);
-
-  void prepareForRequest(const QString &command, const QString &data);
-};

src/swig/server.i

@@ -93,3 +93,21 @@ void Room::roomStart() {
   
 %}
 
+%nodefaultctor ServerPlayer;
+%nodefaultdtor ServerPlayer;
+class ServerPlayer : public Player {
+public:
+  Server *getServer() const;
+  Room *getRoom() const;
+  void setRoom(Room *room);
+
+  void speak(const QString &message);
+
+  void doRequest(const QString &command,
+           const QString &json_data, int timeout);
+  QString waitForReply();
+  QString waitForReply(int timeout);
+  void doNotify(const QString &command, const QString &json_data);
+
+  void prepareForRequest(const QString &command, const QString &data);
+};

src/ui/qmlbackend.cpp

@@ -1,5 +1,7 @@
 #include "qmlbackend.h"
+#ifndef Q_OS_WASM
 #include "server.h"
+#endif
 #include "client.h"
 #include "util.h"
 
@@ -11,14 +13,18 @@ QmlBackend::QmlBackend(QObject* parent)
   Backend = this;
   engine = nullptr;
   rsa = RSA_new();
+#ifndef Q_OS_WASM
   parser = fkp_new_parser();
+#endif
 }
 
 QmlBackend::~QmlBackend()
 {
   Backend = nullptr;
   RSA_free(rsa);
+#ifndef Q_OS_WASM
   fkp_close(parser);
+#endif
 }
 
 QQmlApplicationEngine *QmlBackend::getEngine() const
@@ -33,6 +39,7 @@ void QmlBackend::setEngine(QQmlApplicationEngine *engine)
 
 void QmlBackend::startServer(ushort port)
 {
+#ifndef Q_OS_WASM
   if (!ServerInstance) {
     Server *server = new Server(this);
 
@@ -41,6 +48,7 @@ void QmlBackend::startServer(ushort port)
       emit notifyUI("ErrorMsg", tr("Cannot start server!"));
     }
   }
+#endif
 }
 
 void QmlBackend::joinServer(QString address)
@@ -81,7 +89,7 @@ void QmlBackend::cd(const QString &path) {
 }
 
 QStringList QmlBackend::ls(const QString &dir) {
-  return QDir(dir).entryList(QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot);
+  return QDir(QUrl(dir).path()).entryList(QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot);
 }
 
 QString QmlBackend::pwd() {
@@ -169,12 +177,14 @@ QString QmlBackend::callLuaFunction(const QString &func_name,
 }
 
 QString QmlBackend::pubEncrypt(const QString &key, const QString &data) {
-  BIO *keyio = BIO_new_mem_buf(key.toLatin1().data(), -1);
+  auto key_bytes = key.toLatin1();
+  BIO *keyio = BIO_new_mem_buf(key_bytes.constData(), -1);
   PEM_read_bio_RSAPublicKey(keyio, &rsa, NULL, NULL);
   BIO_free_all(keyio);
 
+  auto data_bytes = data.toUtf8();
   unsigned char buf[RSA_size(rsa)];
-  RSA_public_encrypt(data.length(), (const unsigned char *)data.toUtf8().data(),
+  RSA_public_encrypt(data.length(), (const unsigned char *)data_bytes.constData(),
     buf, rsa, RSA_PKCS1_PADDING);
   return QByteArray::fromRawData((const char *)buf, RSA_size(rsa)).toBase64();
 }
@@ -209,6 +219,7 @@ void QmlBackend::saveConf(const QString &conf) {
 }
 
 void QmlBackend::parseFkp(const QString &fileName) {
+#ifndef Q_OS_WASM
   if (!QFile::exists(fileName)) {
 //    errorEdit->setText(tr("File does not exist!"));
     return;
@@ -245,8 +256,10 @@ void QmlBackend::parseFkp(const QString &fileName) {
   }
 */
   QDir::setCurrent(cwd);
+#endif
 }
 
+#ifndef Q_OS_WASM
 static void copyFkpHash2QHash(QHash<QString, QString> &dst, fkp_hash *from) {
   dst.clear();
   for (size_t i = 0; i < from->capacity; i++) {
@@ -261,6 +274,7 @@ void QmlBackend::readHashFromParser() {
   copyFkpHash2QHash(skills, parser->skills);
   copyFkpHash2QHash(marks, parser->marks);
 }
+#endif
 
 QString QmlBackend::calcFileMD5() {
   return ::calcFileMD5();

src/ui/qmlbackend.h

@@ -1,7 +1,9 @@
 #ifndef _QMLBACKEND_H
 #define _QMLBACKEND_H
 
+#ifndef Q_OS_WASM
 #include "fkparse.h"
+#endif
 #include <qtmetamacros.h>
 
 class QmlBackend : public QObject {
@@ -48,7 +50,9 @@ signals:
 private:
   QQmlApplicationEngine *engine;
   RSA *rsa;
+#ifndef Q_OS_WASM
   fkp_parser *parser;
+#endif
   QHash<QString, QString> generals;
   QHash<QString, QString> skills;
   QHash<QString, QString> marks;