The Qt Network module provides a set of APIs for programming applications that use TCP/IP. Operations such as requests, cookies, and sending data over HTTP are handled by various C++ classes.
Using the Module
Using a Qt module's C++ API requires linking against the module library, either directly or through other dependencies. Several build tools have dedicated support for this, including CMake and qmake.
Building with CMake
find_package() command to locate the needed module component in the
find_package(Qt6 REQUIRED COMPONENTS Network) target_link_libraries(mytarget PRIVATE Qt6::Network)
For more details, see the Build with CMake overview.
Building with qmake
To configure the module for building with qmake, add the module as a value of the
QT variable in the project's .pro file:
QT += network
Articles and Guides
These articles contain information about Qt Network setup and about applications with networking capabilities.
- Network Programming with Qt - Programming applications with networking capabilities
- Secure Sockets Layer (SSL) Classes - Classes for secure communication over network sockets
These are links to the API reference materials.
Changes to Qt Network lists important changes in the module API and functionality that were done for the Qt 6 series of Qt.
Licenses and Attributions
Qt Network is available under commercial licenses from The Qt Company. In addition, it is available under the GNU Lesser General Public License, version 3, or the GNU General Public License, version 2. See Qt Licensing for further details.
Furthermore, Qt Network in Qt 6.5.1 may contain third-party modules under the following permissive licenses:
The Public Suffix List, version a304485800b4b6b796fcccbb3be1585f189ee038, fetched on 2023-05-03
Mozilla Public License 2.0
libpsl - C library to handle the Public Suffix List, version 664f3dc85259ec65e30248a61fa1c45b7b0e4c3f
BSD 3-clause "New" or "Revised" License
Qt Network can make use of the OpenSSL Toolkit as a back end. The library is then linked against OpenSSL in a way that requires compliance with the OpenSSL License. To allow linking OpenSSL with Qt Network under the GPL, following exceptions to the GPL do apply:
In addition, as a special exception, the copyright holders listed above give permission to link the code of its release of Qt with the OpenSSL project's "OpenSSL" library (or modified versions of the "OpenSSL" library that use the same license as the original version), and distribute the linked executables. You must comply with the GNU General Public License version 2 in all respects for all of the code used other than the "OpenSSL" code. If you modify this file, you may extend this exception to your version of the file, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version of this file.
Also note shipping OpenSSL might cause Import and Export Restrictions to apply.
© 2023 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.