Upload file to server via https

xbasista

Hello,

i'm new in QT and i do not know how to send file to server. I have url like:
"https://www.example.com/?import=data=&DATA&",
where &DATA& is that file.

i need something like:

request("https://www.example.com/?import=data=&DATA&");

respond = respond();
qDebug << respond;

Is is possible?

JonB

@xbasista
From that URL I don't think it takes a file to upload. Rather I suspect you have to supply the data/content of the file where shown on the URL?

You can use QNetworkReply *QNetworkAccessManager::get(const QNetworkRequest &request) to make the URL request you show.

xbasista

This post is deleted!

JonB

@xbasista
From that URL I don't think it takes a file to upload. Rather I suspect you have to supply the data/content of the file where shown on the URL?

You can use QNetworkReply *QNetworkAccessManager::get(const QNetworkRequest &request) to make the URL request you show.

artwaw

@xbasista
https://doc.qt.io/qt-5/qnetworkaccessmanager.html

https://doc.qt.io/qt-5/qnetworkrequest.html

https://doc.qt.io/qt-5/qnetworkreply.html

SGaist

Hi and welcome to devnet,

Beside the good points of my fellow, depending on your OS ensure that you have OpenSSL available as well.

xbasista

Thanks,

@JonB you were right. I made simple http request as you wrote. It is working perfectly but when I put that application on another pc I get empty response (response = ""). It looks like application do not comunication to server. I tried add exception to windows firewall, turn off ativirus but it still not working.

Does anyone know where the problem might be?

jsulm

@xbasista said in Upload file to server via https:

Does anyone know where the problem might be?

You should add error handling to your code to see what happens.
https://doc.qt.io/qt-5/qnetworkreply.html#errorOccurred

JonB

@xbasista
As Per @jsulm, you should always add error handling to your code. Since you are trying to access an https, at a guess you do not have the necessary Qt OpenSSL requirements on one machine.

jsulm

@JonB @xbasista https://doc.qt.io/qt-5/qnetworkaccessmanager.html#sslErrors

xbasista

@jsulm
I added to my code and i found out that on another pc is not openssl support [ QSslSocket::supportsSsl() ].
I read that https://stackoverflow.com/questions/20351155/how-can-i-enable-ssl-in-qt-windows-application and i think i need libeay32.dll and ssleay32.dll libs. The problem is i do not know where can i found that files? They shloud be in openSSL folder/bin but i don't have that folder.

Output on build pc:

SslSupport:  true
SslLibraryBuildVersion:  "OpenSSL 1.1.1g  21 Apr 2020"
SslLibraryRuntimeVersion:  "OpenSSL 1.1.1k  25 Mar 2021"

Output on another pc:

SslSupport:  
SslLibraryBuildVersion:  "OpenSSL 1.1.1g  21 Apr 2020"
SslLibraryRuntimeVersion:

xbasista

I found out that:

"
For ssl 1.0.x (qt<5.12.4) you are likely missing libeay32.dll and ssleay32.dll.

For ssl 1.1.x (qt>=5.12.4) binary compatibility broke (qt 5.12.4 released), so you might need libssl-1_1.dll and libcrypto-1_1.dll, and its dependencies capi.dll and dasync.dll.
"

So i import libssl-1_1-x64.dll and libcrypto-1_1-x64.dll from my openssl and everything working.

Thanks