qt.network.ssl: No functional TLS backend was found ?
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@BVladimir said in qt.network.ssl: No functional TLS backend was found ?:
But is openssl really necessary for the simplest qml window?
no, but it seems you are loading resources from secured network address (
main_window.qml: Network error)@BVladimir said in qt.network.ssl: No functional TLS backend was found ?:
Does not work - version 1.1.1L- copied the content...\OpenSSL-Win64\lib to ...\x64\Debug where is my dll - nothing...
as i said make sure they are in the PATH env variable or next to your executable.
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I don't have an exe file, just a python script calling a function from a dll. The entire openssl lib is in the directory with the dll. In the dll itself, the only code from qt:
int argc = 1; const char* p1{ "C" }; const char** argv = &p1; QGuiApplication app(argc, (char**) argv);QCoreApplication::addLibraryPath("C:\Program Files\OpenSSL-Win64\lib");
QQmlApplicationEngine engine;
const QUrl url(QStringLiteral("C:\C++\for_quik_lua535\x64\Debug\main_window.qml"));
QObject::connect(&engine, &QQmlApplicationEngine::objectCreated, &app,
[url](QObject* obj, const QUrl& objUrl) { if (!obj && url == objUrl) QCoreApplication::exit(-1);},
Qt::QueuedConnection);
engine.load(url);
return PyLong_FromLong(app.exec()); -
Hi,
That's not the purpose of addLibraryPath. As @raven-worx already suggested the .dlls should be findable in the PATH environment variable.
How are you starting your script ?
How did you install Python ?
Can you explain what your script does ?
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addLibraryPath - just in case. env. path is set.
py script, starting from VS 2019, python 3.9 by standard installer:from importlib.machinery import ExtensionFileLoader
dll = ExtensionFileLoader('py2quik_module', r'C:\C++\for_quik_lua535\x64\Debug\for_quik_lua535.dll').load_module()if name == 'main':
py_obj = dll.py2dll_obj(None) -
@BVladimir said in qt.network.ssl: No functional TLS backend was found ?:
py2quik
Would you mind explaining what exactly you are trying to load ?
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Out of curiosity, why not use PySide or PyQt since you are already working with Python ?
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What kind of data do you intend to process ?
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I tried to build an exe file:
#include <QGuiApplication>
#include <QQmlApplicationEngine>int main(int argc, char* argv[]) {
int argc2 = 1;
const char* p1{ "C" };
const char** argv2 = &p1;QGuiApplication app(argc2, (char**)argv2); QQmlApplicationEngine engine; const QUrl url(QStringLiteral("qrc:tmpQML/tmpQML.qml")); QObject::connect(&engine, &QQmlApplicationEngine::objectCreated, &app, [url](QObject* obj, const QUrl& objUrl) { if (!obj && url == objUrl) QCoreApplication::exit(-1); }, Qt::QueuedConnection); engine.load(url); return app.exec();}
Same QML:
import QtQuick 2.12
import QtQuick.Controls 2.12ApplicationWindow {
title: "Qt Quick Controls Gallery" visible: true width: 640 height: 480}
When running from VS 2019, it works fine. And does not try to search any of:
QFactoryLoader::QFactoryLoader() checking directory path "C:/Qt/6.2.1/msvc2019_64/plugins/platforms/networkaccess" ...
or
QFactoryLoader::QFactoryLoader() checking directory path "C:/Qt/6.2.1/msvc2019_64/plugins/platforms/tls" ...
It's only with dll problem...
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What are going to use to process your data ?
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Well, I must say I fail to understand your architecture here.
What is so speed critical in your app that you need to have your UI in C++ while doing some processing in Python while the rest is done in C++ again.
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Why not load the data directly in Python using something like numpy ?
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If you do all the heavy lifting in Python you should benchmark the GUI as well.
