Book Image

Learn Qt 5

By : Nicholas Sherriff
Book Image

Learn Qt 5

By: Nicholas Sherriff

Overview of this book

Qt is a mature and powerful framework for delivering sophisticated applications across a multitude of platforms. It has a rich history in the Linux world, is widely used in embedded devices, and has made great strides in the Mobile arena over the past few years. However, in the Microsoft Windows and Apple Mac OS X worlds, the dominance of C#/.NET and Objective-C/Cocoa means that Qt is often overlooked. This book demonstrates the power and flexibility of the Qt framework for desktop application development and shows how you can write your application once and deploy it to multiple operating systems. Build a complete real-world line of business (LOB) solution from scratch, with distinct C++ library, QML user interface, and QtTest-driven unit-test projects. This is a suite of essential techniques that cover the core requirements for most LOB applications and will empower you to progress from a blank page to shipped application.
Table of Contents (11 chapters)

Web Requests

If you haven't worked with the HTTP protocol before, it boils down to a conversation between a client and a server consisting of requests and responses. For example, we can make a request to in our favorite web browser, and we will receive a response containing various news items and articles. In the get() method of our NetworkAccessManager wrapper, we reference a QNetworkRequest (our request to a server) and a QNetworkReply (the server's response back to us). While we won’t directly hide QNetworkRequest and QNetworkReply behind their own independent interfaces, we will take the concept of a web request and corresponding response and create an interface and implementation for that interaction. Still in cm-lib/source/networking, create an interface header file i-web-request.h:

#include <QUrl...