Hi,

I will show u 2 situations, and the difference between those two is only a switch concerning 2 lignes

code 1 :

Qt Code: 
  1. Window::Window()    
  2. {    
  3.     AppVars::urlRSSlist << "http://rss.lemonde.fr/c/205/f/3050/index.rss";  
  4.  
  5.  
  6.     for(int i=0;i<AppVars::urlRSSlist.size();i++){  
  7.         qDebug() << "enter for loop for i = "+QString::number(i);  
  8.         netManList<< new QNetworkAccessManager(this);  
  9.         listRequest<<QNetworkRequest(QUrl(AppVars::urlRSSlist[i]));  
  10.         listReply<<netManList[i]->get(listRequest[i]);  
  11.     }  
  12.     QObject::connect (listReply[0], SIGNAL(readyRead()), this, SLOT(downloadedRSSalaune())) ;  
  13.  
  14. }    
  15.  
  16. void Window::downloadedRSSalaune(){  
  17.  
  18.     qDebug() << listReply[0]->errorString();  
  19.  
  20.     if(listReply[0]->error() != QNetworkReply::NoError)  
  21.         return;  
  22. //HERE
  23.     QByteArray data =QByteArray(listReply[0]->readAll());  
  24.     qDebug() <<listReply[0]->readAll(); 
  25.  
  26.     int statusCode = listReply[0]->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();  
  27.     qDebug() << QVariant(statusCode).toString();  
  28. }
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code 2 :

Qt Code: 
  1. Window::Window()    
  2. {    
  3.     AppVars::urlRSSlist << "http://rss.lemonde.fr/c/205/f/3050/index.rss";  
  4.  
  5.  
  6.     for(int i=0;i<AppVars::urlRSSlist.size();i++){  
  7.         qDebug() << "enter for loop for i = "+QString::number(i);  
  8.         netManList<< new QNetworkAccessManager(this);  
  9.         listRequest<<QNetworkRequest(QUrl(AppVars::urlRSSlist[i]));  
  10.         listReply<<netManList[i]->get(listRequest[i]);  
  11.     }  
  12.     QObject::connect (listReply[0], SIGNAL(readyRead()), this, SLOT(downloadedRSSalaune())) ;  
  13.  
  14. }    
  15.  
  16. void Window::downloadedRSSalaune(){  
  17.  
  18.     qDebug() << listReply[0]->errorString();  
  19.  
  20.     if(listReply[0]->error() != QNetworkReply::NoError)  
  21.         return;  
  22. //AND HERE
  23.        qDebug() <<listReply[0]->readAll();
  24.  QByteArray data =QByteArray(listReply[0]->readAll());  
  25.  
  26.  
  27.     int statusCode = listReply[0]->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();  
  28.     qDebug() << QVariant(statusCode).toString();  
  29. }
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as you can see, only qDebug() and QByteArray calling order differ between those code, and I've got 2 different results :

result 1 :
Qt Code: 
  1. "enter for loop for i = 0"  
  2. "Unknown error"  
  3. ""  
  4. "200"
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result 2 :
Qt Code: 
  1. "enter for loop for i = 0"  
  2. "Unknown error"  
  3. "<?xml [................................. lot of lines...............]"  
  4. "200"
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What's going on here ?

N.B. :
Qt Code: 
  1. QList<QNetworkAccessManager*> netManList;  
  2. QList<QNetworkRequest> listRequest;  
  3. QList<QNetworkReply*> listReply;
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