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 a Qt module requires linking against the module library, either directly or through other dependencies. Several build tools have dedicated support for this, including CMake and qmake.
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.
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
These articles contain information about Qt Network setup and about applications with networking capabilities.
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.
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 6.4.1 may contain third-party modules under the following permissive licenses:
The Public Suffix List, version d17a65633b0286833727ef21e897a22564695ef5, fetched on 2022-05-23
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.
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