how to unzip the file in qt using gzip

[iswaryasenthilkumar]

am having zip file in server while i downloading i have to unzip the file using qt..still i dont get proper solution for this
qt experts can any one give me suggestion for this
Tahnks in advance

[jefftee]

Use QProcess to run gunzip.

[anda_skoa]

Or use KArchive http://inqlude.org/libraries/karchive.html

Cheers,
_

[iswaryasenthilkumar]

can you give some examples plss.

Use QProcess to run gunzip.

i have to unzip the files using gzip..

Or use KArchive http://inqlude.org/libraries/karchive.html

Cheers,
_

[jefftee]

can you give some examples plss.

Not until you have read the docs for QProcess and attempted to implement.

[iswaryasenthilkumar]

i read and implemented in my code bt i dont get any result from my code

Not until you have read the docs for QProcess and attempted to implement.

[jefftee]

Did the QProcess start/run?
Did you connect the started(), finished(), and error() signals? Did any of the signals fire?
What was the exit code and exit status for your QProcess?

Answer these questions and post some code using [code][/code] tags please.

[iswaryasenthilkumar]

this was my code

#include "widget.h"
#include "ui_widget.h"
#include<QtGui>
 
Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
 
    QString program = "/home/digital_images/Desktop/zipfile.zip.gz";//path to zip file
    QStringList arguments;
    myProcess = new QProcess(this);
    connect (myProcess, SIGNAL(readyReadStandardOutput()), this, SLOT(printOut()));
    connect (myProcess, SIGNAL(readyReadStandardError()), this, SLOT(printError()));
    myProcess->start(program, arguments);
    myProcess->waitForFinished();
    ui->setupUi(this);
}
 
Widget::~Widget()
{
    delete ui;
}
void Widget::printOut()
{
    QByteArray byteArray = myProcess->readAllStandardOutput();
   QStringList strLines = QString(byteArray).split("\n");
 
   foreach (QString line, strLines)
   {
       qDebug()<<line<<"Outputline";
   }
 
}
void Widget::printError()
{
    QByteArray byteArray = myProcess->readAllStandardError();
   QStringList strLines = QString(byteArray).split("\n");
 
   foreach (QString line, strLines)
   {
       qDebug()<<"Errorline"<<line;
   }
}

#include "widget.h"
#include "ui_widget.h"
#include<QtGui>

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{

    QString program = "/home/digital_images/Desktop/zipfile.zip.gz";//path to zip file
    QStringList arguments;
    myProcess = new QProcess(this);
    connect (myProcess, SIGNAL(readyReadStandardOutput()), this, SLOT(printOut()));
    connect (myProcess, SIGNAL(readyReadStandardError()), this, SLOT(printError()));
    myProcess->start(program, arguments);
    myProcess->waitForFinished();
    ui->setupUi(this);
}

Widget::~Widget()
{
    delete ui;
}
void Widget::printOut()
{
    QByteArray byteArray = myProcess->readAllStandardOutput();
   QStringList strLines = QString(byteArray).split("\n");

   foreach (QString line, strLines)
   {
       qDebug()<<line<<"Outputline";
   }

}
void Widget::printError()
{
    QByteArray byteArray = myProcess->readAllStandardError();
   QStringList strLines = QString(byteArray).split("\n");

   foreach (QString line, strLines)
   {
       qDebug()<<"Errorline"<<line;
   }
}

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what am doing wrong please guide me

Did the QProcess start/run?
Did you connect the started(), finished(), and error() signals? Did any of the signals fire?
What was the exit code and exit status for your QProcess?

Answer these questions and post some code using [code][/code] tags please.

[jefftee]

First, you are setting the program to the zip file. Aren't you attempting to run program gunzip instead? The file name of your zip file should be one of the arguments you pass to the gunzip program.

What is the return code from waitForFinished? If you are not going to use the started, finished, and error signals, then you should also waitForStarted() after you start the QProcess and check its return code as well.

Edit: The waitFor* methods will block until they either timeout or the condition is satisfied, so if you are doing this from your GUI thread, your GUI will freeze, which is why I recommend you use the started, finished, and error signals instead.