Automatically upload data on server from selected directory path

developerNancy

I have developed linux app to upload data on server from selected folder on button click and saving that data in sent folder Now I want to upload data automatically when there is any files in folder.

If any one knows how to upload data automatically if user select an directory only one time then please let me know?

koahnig

@developerNancy

You can find out if there are files in a folder with QDir::entryInfoList with filter QDir::Files

developerNancy

@koahnig I have done with uploading on button click but Now I want to upload automatically when new file added in that folder.

J.Hilk

@developerNancy Than you'll have to save a reference of the QDir::entryInfoList in a member variable and periotically call QDir::entryInfoList to compare with your member variable List.

If the latest call contains a file not in your m-Varibale, update your list and upload the new file.

koahnig

@developerNancy

There is also the QFileSystemWatcher which tells you when there is a change.

developerNancy

@koahnig I have done with that My main query is to upload automatically

developerNancy

@J.Hilk After getting new file How to send it to server automatically?

koahnig

@developerNancy said in Automatically upload data on server from selected directory path:

@J.Hilk After getting new file How to send it to server automatically?

@koahnig said in Automatically upload data on server from selected directory path:

@developerNancy

There is also the QFileSystemWatcher which tells you when there is a change.

Follow the link given in the post above.

J.Hilk

@developerNancy

I didn't knwo QFileSystemWatcher was a thing so I'll use that.

//*.h
#include <QFileSystemWatcher>
...

private slots:
   void uploadViaQNetworkManager(QString filePath){//Your upload code;}

   void watcherSlot(QString s);

private:
    QFileSystemWatcher watcher; 
    QList<QString> m_refList;

//*.cpp
watcher.addPath(PathToUploadFolder);
QDir dir; 
dir.setPath(PathToUploadFolder);
if(!dir.entryList(QDir::Files).isEmpty())
        for(auto &str :dir.entryList(QDir::Files | QDir::NoDotAndDotDot)){
            m_refList.append( str);

connect(&watcher, &QFileSystemWatcher::directoryChanged, this, &myClass::watcherSlot);

void myClass::watcherSlot(QString s){
   QString newfile;
   QDir dir; 
   dir.setPath(s);
   if(!dir.entryList(QDir::Files).isEmpty())
       for(int i = 0; i < m_refList.size(); i++){
           bool newEntry = true;;
           for(newfile : dir.entryList(QDir::Files | QDir::NoDotAndDotDot)){
               if(m_refList.at(i) == newfile)
                  newEntry = false;
            if(newEntry){
               uploadViaQNetworkManager(s+"\n"+newfile);
               m_refList.append(newfile);
             }
        }
}

Disclaimer this is pseudo code and untested. But the prinziple should be valid

Edit: changed the filter from dirs to files.

jsulm

@developerNancy said in Automatically upload data on server from selected directory path:

After getting new file How to send it to server automatically?

Didn't you say in your first post that you already implemented uploading to the server?

developerNancy

@jsulm Yes I have done with Uploading Multiple files to server Now I want to implement background sync. like if any file copy in selected folder than it automatically uploaded to server. For this watcher or threading which is the best solution.....

jsulm

@developerNancy That I understand. What I don't understand: if you're able to upload multiple files why can't you upload one? So, what exactly is the problem?

developerNancy

@jsulm I want to sync data in background it automatically uploaded when new file is added in directory no need to click again upload button.

jsulm

@developerNancy That I understand. You already was pointed to QFileSystemWatcher, @J-Hilk even provided code. So, what is not working?

developerNancy

@jsulm which is the best approach for background sync I am Implementing thread ...

developerNancy

@J.Hilk Can you please explain How I get the Path and watcher active after button click.

J.Hilk

@developerNancy you don't share any code sample with us, so it's hard to give definite working answers. You'll have to take what we write and integrate into your project.

That said I gave you a rough example how to setup and use the watcher.

@J.Hilk said in Automatically upload data on server from selected directory path:

@developerNancy

//*.h
QFileSystemWatcher watcher;

//*.cpp
watcher.addPath(PathToUploadFolder);
QDir dir; 
dir.setPath(PathToUploadFolder);
if(!dir.entryList(QDir::Files).isEmpty())
        for(auto &str :dir.entryList(QDir::Files | QDir::NoDotAndDotDot)){
            m_refList.append( str);

connect(&watcher, &QFileSystemWatcher::directoryChanged, this, &myClass::watcherSlot);

@developerNancy said in Automatically upload data on server from selected directory path:

How I get the Path

I don't know! How do you specify the folder for the multi file upload to the server? Just copy that path to a Qstring and give it to your QFileSystemWatcher-Instance