I have a piece of code as show belowe, wich run well with C++Builder-6.
Now I have moved tha program to C++Builder-XE and the call to "RiconfiguraNodo << nomeNodo ...." give me the ambguity error report belowe.
I tried several way to rewrite the call to the ole proceudre "RiconfiguraNodo", but I didn't find a working solution.
How can I rewrite this snippet of code in way suitable for C++BuilderXE
Error reported:
[BCC32 Error] UnitMain.cpp(262): E2015 Ambiguity between 'operator
System::AutoCmd::<<(const System::Currency) at c:\program files
(x86)\embarcadero\rad studio\8.0\include\windows\rtl\sysvari.h:3561'
and 'operator System::AutoCmd::<<(const System::TDateTime)
at c:\program files (x86)\embarcadero\rad
studio\8.0\include\windows\rtl\sysvari.h:3562'
Full parser context
UnitMain.cpp(245): parsing: void _fastcall TFormMain::RiconfiguraNodo(System::UnicodeString,System::UnicodeString,System::UnicodeString,System::UnicodeString)
Sample code:
Procedure RiconfiguraNodo( L"RiconfiguraNodo" );
if (VarServerPmvManager.IsEmpty() || VarServerPmvManager.IsNull())
{
VarServerPmvManager = VarServerPmvManager.CreateObject(ProgId_ServerPmvmanager);
}
try
{
VarServerPmvManager.Exec( RiconfiguraNodo << nomeNodo << ipAddress << tipoPmv << cmdType );
}
catch (Exception & ex)
{
Mylog(Fun + Sysutils::Format("ERROR=[%s] ", ARRAYOFCONST((ex.Message))));
}
I found the solution.
The procedure exec simply require Variant instead of plain string
Variant vNomeNodo, vIpAddress, vTipoPmv, vCmdType;
vNomeNodo = nomeNodo;
vIpAddress = ipAddress;
vTipoPmv = tipoPmv;
vCmdType = cmdType;
VarServerPmvManager.Exec( RiconfiguraNodo << vNomeNodo << vIpAddress << vTipoPmv << vCmdType );
Related
I am on a Windows Server which is in the same network as the Server with the computer name service.
I got this simple code which tries to list the content
QFileInfoList fiList = QDir("\\service\\Documents").entryInfoList(QDir::Files);
qDebug() << "sizeof filist: " << fiList.size();
for (const QFileInfo& fi : fiList)
{
qDebug() << fi.absoluteFilePath();
}
The output is the following:
sizeof filist: 0
I make sure that the folder is shared on the network by checking the properties and also using the windows explorer. I can access the folder via Windows Explorer.
Is the functionality I am trying to achieve not possible with QDir?
It turns out there are 2 backslashes more needed because \ needs to be escaped.
So the right code would be:
QFileInfoList fiList = QDir("\\\\service\\Documents").entryInfoList(QDir::Files);
qDebug() << "sizeof filist: " << fiList.size();
for (const QFileInfo& fi : fiList)
{
qDebug() << fi.absoluteFilePath();
}
I have a problem copying files with scp. I use Qt and copy my files with scp using QProcess. And when something bad happens I always get exitCode=1. It always returns 1. I tried copying files with a terminal. The first time I got the error "Permission denied" and the exit code was 1. Then I unplugged my Ethernet cable and got the error "Network is unreachable". And the return code was still 1. It confuses me very much cause in my application I have to distinct these types of errors.
Any help is appreciated. Thank you so much!
See this code as a working example:
bool Utility::untarScript(QString filename, QString& statusMessages)
{
// Untar tar-bzip2 file, only extract script to temp-folder
QProcess tar;
QStringList arguments;
arguments << "-xvjf";
arguments << filename;
arguments << "-C";
arguments << QDir::tempPath();
arguments << "--strip-components=1";
arguments << "--wildcards";
arguments << "*/folder.*";
// tar -xjf $file -C $tmpDir --strip-components=1 --wildcards
tar.start("tar", arguments);
// Wait for tar to finish
if (tar.waitForFinished(10000) == true)
{
if (tar.exitCode() == 0)
{
statusMessages.append(tar.readAllStandardError());
return true;
}
}
statusMessages.append(tar.readAllStandardError());
statusMessages.append(tar.readAllStandardOutput());
statusMessages.append(QString("Exitcode = %1\n").arg(tar.exitCode()));
return false;
}
It gathers all available process output for you to analyse. Especially look at readAllStandardError().
I have following chunk of Qt code:
if(this->ueCommunicationsSocket()->bind(QHostAddress(data[0].toString()),
static_cast<quint16>(data[1].toInt())),
QAbstractSocket::ShareAddress)
{
qDebug() << Q_FUNC_INFO
<< "TCP socket bind succesfull";
}
else
{
qDebug() << Q_FUNC_INFO
<< QString::number(this->ueCommunicationsSocket()->error())
<< this->ueCommunicationsSocket()->errorString(); // here i get semantic issue
} // if
and I am getting semantic issue warning code will never be executed. I am aware this is some dumb mistake and I am ready to get downvote(s), however, I cannot find mistake! Here is also a screenshot:
if(this->ueCommunicationsSocket()->bind(QHostAddress(data[0].toString()),
static_cast<quint16>(data[1].toInt())),
QAbstractSocket::ShareAddress)
is
if ( /*something */, QAbstractSocket::ShareAddress)
since AbstractSocket::SharedAddress is 0x1, this condition with a comma operator ! is always true, i.e. the else branch will never be executed.
I'm developing a client app whose purpose is to download some files from a web server, temporarily store them in the Temp folder, check for file integrity, then send them to a FTP server in a Embedded Linux device.
Recently I got problems when doing the process in a preliminary development stage when I was trying to do the download from my local machine (see related question here). Now I'm able to download and upload without errors and with verification (I'm using QCryptographicHash + file size to check for any nonconformities) from my machine, but the same doesn't happen when I try downloading from the HTTP server.
There is a total of 8 files being downloaded: three .tar.gz, one simple text, two programs and two binaries. I'm able to successfully download all compressed files, the text file and one of the binaries, but the others, namely the two programs and one of the binaries (a Linux Kernel image) are always being incorrectly downloaded.
I check this by noticing not only that the hash returns error for them, but also for their sizes: their sizes are always wrong (and always the same erroneous value for any download attempt). And the files in the server are all correct.
My first suspicion was that I need to configure the HTTP download in a way that differs from the common FTP download from the local machine, but I'm unaware on how would that be. Moreover if this extra configuration was needed, then why some of the files always return correctly?
Here is the relevant code as for now:
void MainWindow::processNextDownload()
{
QUrl ulrTemp(updateData.at(transferStep).downloadUrl.arg(ui->leID->text())); //"//" +
if (updateData.at(transferStep).downloadUrl.contains("http"))
ulrTemp.setScheme("http");
else
ulrTemp.setScheme("file");
// ulrTemp.setUserName();
// ulrTemp.setPassword();
// ulrTemp.setPort();
qDebug() << "Downloading" << transferStep << "from" << ulrTemp;
#if 1
poReply = downloadNetworkManager->get(QNetworkRequest(ulrTemp));
#else
QNetworkRequest request;
request.setUrl(ulrTemp);
request.setRawHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.17 (KHTML, like Gecko) Chrome/24.0.1312.60 Safari/537.17");
poReply = downloadNetworkManager->get(request);
#endif
connect(poReply,SIGNAL(downloadProgress(qint64,qint64)),this,SLOT(slotDownloadProgress(qint64,qint64)));
ui->statusBar->showMessage(tr("Downloading: %1").arg(updateData.at(transferStep).itemName));
}
void MainWindow::slotFileDownloaded(QNetworkReply* reply)
{
if (reply && (reply->error() != QNetworkReply::NoError))
{
ui->statusBar->clearMessage();
if (!isSingleFile)
{
const QString strTemp = tr("An error occurred while downloading \"%1\": %2 (error message: %3)")
.arg(updateData.at(transferStep).downloadName).arg(reply->error()).arg(reply->errorString());
QMessageBox::critical(this,tr("Error in download"),strTemp);
}
else
{
//irrelevant...
}
finished(false);
return;
}
qDebug() << "To write: " << reply->bytesAvailable();
QByteArray downloadedData = reply->readAll();
reply->deleteLater();
poReply->deleteLater();
//![]
static const QString tempFilePath = QDir::tempPath();
if (!isSingleFile)
{
QFile file(tempFilePath + "/" + updateData.at(transferStep).downloadName);
if (!file.open(QFile::WriteOnly | QFile::Truncate))
{
qDebug() << "Failure opening temp file to write: " << file.fileName();
QMessageBox::critical(this,
tr("Error"),
tr("An error occured while trying to open a temporary file to write the downloaded data (file: %1).").arg(file.fileName()));
transferStep = downloadStepCount;
slotFileUploaded(NULL);
return;
}
qint32 bytesWritten = file.write(downloadedData);
file.flush();
if (downloadedData.size() != bytesWritten)
qDebug() << "Write failed, wrote" << bytesWritten << "out of" << downloadedData.size() << "bytes.";
else
qDebug() << "Wrote " << bytesWritten << "bytes.";
file.close();
//![]
if (++transferStep >= downloadStepCount)
{
qDebug() << "Start hash check";
slotStartHashCheck();
return;
}
processNextDownload();
}
else
{
//irrelevant...
}
}
And this is why I get (the last number value after the "=" in the hash code is the file size):
So what am I missing?
I have a problem with coding. I'm using drag and drom inside my application but some text files I can not open, after some searching I find that the path is with wrong coding. The real file is 'Some_file - 01.txt' but when I try print this path (after drop) to the stdout I will get 'Some_file – 01.txt'. What I miss:
void MainWindow::dropEvent(QDropEvent *event) {
QList<QUrl> urls = event->mimeData()->urls();
...
cout << paths[1].toLocalFile() << endl; /* Some_file – 01.txt */
cout << paths[1].toEncoded() << endl; /* Some_file%20%E2%80%93%2001.txt */
}
I also try QString::fromLatin1 or fromUtf8 but without success.
I'm using QT 4.7.0 and Windows 7.
Edit:
This is my main setup:
QTextCodec::setCodecForCStrings(QTextCodec::codecForName("UTF-8"));
QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8"));
QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
And unfortunately even this is not working for me:
QString fileName = QFileDialog::getOpenFileName(this, tr("Load EEPROM from HEX file"), "", tr("HEX file (*.hex)"));
ifstream hexFile(fileName.toStdString().c_str());
I'm not able to open files where the char '-' is part of file name.
EDIT2:
If I change the file name manualy from 'file.txt' to 'file-.txt' everything is working well. But when I (the same file) copy and paste this file to the same folder, windows will generate new name with postfix: 'file - copy.txt' and this file I can NOT open. So the Windows is using different character for '-' vz. '–'.
What I can do ?
Solution:
void openFile(string fileName) {
ifstream fileio(fileName.c_str());
}
QString qtFileName = QFileDialog::getOpenFileName(...)
openFile(qtFileName.toLocal8Bit().constData());
std::cout is encoded with some local encoding. What you need is to convert the QString returned by the toLocalFile() into a local 8 bit encoding.
For example:
QUrl url = ...;
QString filePath = url.toLocalFile();
QByteArray filePath8 = filePath.toLocal8Bit();
std::cout << filePath8.constData();
But really, the whole exercise is not necessary, since to access the files you should be using QFile, which takes a QString directly, and console output can be done using QTextStream. To wit:
#include <cstdio>
#include <QTextStream>
#include <QFile>
QTextStream out(stdout);
void test() {
out << filePath;
QFile file(filePath);
if (file.open(QIODevice::ReadOnly)) {
...
}
}