Write simple web client for website

nikich340 · wrote on 24 Dec 2018, 02:29

I want to try to write simple web client for one website. My client should be able to pass authorization (send data for two text fields), push simple buttons and click checkboxes on current page. I need not view page, go back/next or download something (so I do not want to create browser, only simple client, where I can hardcode urls). To be more common, I must understand how to parse page elements and create requents with actions I described above (also, if it requires authorization, should it somehow save session?).

I just started learn network modules in Qt, so I am quite confused with QWebEngine, QWebKit, QNetwork modules - what of them is most suitable for me? Any literature and examples are welcome. Thanks in advance.

dheerendra · wrote on 24 Dec 2018, 04:45

Since you are starting to learn, your idea is to check how web requests work in Qt, just start using the QNetworkAccessManager. Look at the some examples in Qt installation example directory or google. It will give you idea about you can start accessing the web server.

SGaist · 24 Dec 2018, 19:37

Hi and welcome to devnet,

What is exactly the goal of your application ? Provide a webpage to discuss with the backend ? Do a full custom GUI ?

fouad2130 · S SGaist 24 Dec 2018, 14:45

This post is deleted!

nikich340 · S SGaist 24 Dec 2018, 14:45

@SGaist
TO make something like GUI wrapper for website. It is very inconvenient from usual browser. Also I want to learn a bit net programming in Qt.

VRonin · 27 Dec 2018, 13:33

Something like https://doc.qt.io/qt-5/qtwebengine-webenginewidgets-simplebrowser-example.html ?

so I am quite confused with QWebEngine, QWebKit, QNetwork modules - what of them is most suitable for me?

QtWebKit uses the same engine as apple's safari browser. the module has been discontinued since Qt 5.6
QtWebEngine uses the same engine as google chrome and is used to interact with webpages html and the likes.
QtNetwork is much more low level and is used to manage network communication. You can use QNetworkAccessManager to interact with http but if you need to run html/css/javascript on webpages, you are in the wrong place

nikich340 · V VRonin 27 Dec 2018, 12:50

@VRonin
I see. Thank you, I found some examples, hope I will success one day.
If I am not mistaken, I should use QHttpPart structure to set up sent data and send it.

nikich340 · V VRonin 27 Dec 2018, 12:50

@VRonin Now I am able to download page and read its headers. I see that page has html content-type ([Content-Type]: text/html; charset=utf-8), with some elements of which I should interact. Is it real with QNetwork tools?
I can parse requested pages myself, all what I need is to send data in some html elements on current page.

SGaist · 28 Dec 2018, 12:24

Do you want to show these pages to the user ?

nikich340 · S SGaist 27 Dec 2018, 20:48

@SGaist no, I will create gui elements based on parsed pages.
Well, if I want to interact with html, I have to use QWebEngine anyway..