launch/installwizard_patch.cpp

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#include <math.h>
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#include <QNetworkRequest>
#include <QNetworkReply>
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#include <QtZlib/zlib.h>
#include "installwizard_patch.h"
#include "ui_installwizard_patch.h"
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#include "installwizard.h"
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struct TarHeader
{
char name[100];
char mode[8];
char uid[8];
char gid[8];
char size[12];
char mtime[12];
char chksum[8];
char typeflag;
char linkname[100];
char magic[6];
char version[2];
char uname[32];
char gname[32];
char devmajor[8];
char devminor[8];
char prefix[155];
};
InstallWizard_Patch::InstallWizard_Patch(QWidget *parent) :
QWizardPage(parent),
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ui(new Ui::InstallWizard_Patch),
patchFile(NULL),
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unzippedPatchFile(NULL),
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networkReply(NULL),
isCancelled(false),
isDownloadFinished(false),
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isPatchInstalled(false),
usePatchFileBuffer(true)
{
ui->setupUi(this);
}
InstallWizard_Patch::~InstallWizard_Patch()
{
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delete patchFile;
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delete unzippedPatchFile;
delete ui;
}
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void InstallWizard_Patch::initializePage()
{
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isCancelled = isDownloadFinished = isPatchInstalled = false;
patchFileBuffer.clear();
usePatchFileBuffer = true;
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patchFile = new QTemporaryFile;
patchFile->open();
networkReply = nam.get(QNetworkRequest(QUrl("http://localhost:8080/linuxq3apoint-1.32b-3.x86.run")));
connect(networkReply, SIGNAL(readyRead()), this, SLOT(downloadRead()));
connect(networkReply, SIGNAL(downloadProgress(qint64,qint64)), this, SLOT(downloadProgress(qint64,qint64)));
connect(networkReply, SIGNAL(finished()), this, SLOT(downloadFinished()));
}
void InstallWizard_Patch::cleanupPage()
{
cancel();
}
bool InstallWizard_Patch::isComplete() const
{
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return isDownloadFinished && isPatchInstalled;
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}
void InstallWizard_Patch::cancel()
{
if (isCancelled)
return;
delete patchFile;
patchFile = NULL;
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delete unzippedPatchFile;
unzippedPatchFile = NULL;
if (!isDownloadFinished)
networkReply->abort();
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isCancelled = true;
}
void InstallWizard_Patch::downloadRead()
{
// Skip the first n bytes, giving a valid tar.gz file.
if (usePatchFileBuffer)
{
const qint64 bytesToSkip = 8251;
patchFileBuffer.append(networkReply->readAll());
if (patchFileBuffer.length() > bytesToSkip + 1)
{
patchFile->write(&patchFileBuffer.data()[bytesToSkip], patchFileBuffer.length() - bytesToSkip);
usePatchFileBuffer = false;
patchFileBuffer.clear();
}
}
else
{
patchFile->write(networkReply->readAll());
}
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}
void InstallWizard_Patch::downloadProgress(qint64 bytesRead, qint64 bytesTotal)
{
ui->lblStatus->setText(QString("Downloading %1MB / %2MB").arg(bytesRead / 1024.0 / 1024.0, 0, 'f', 2).arg(bytesTotal / 1024.0 / 1024.0, 0, 'f', 2));
ui->pbProgress->setMaximum((int)bytesTotal);
ui->pbProgress->setValue((int)bytesRead);
}
void InstallWizard_Patch::downloadFinished()
{
Q_ASSERT(networkReply);
if (!isCancelled && networkReply->error())
{
ui->lblStatus->setText(networkReply->errorString());
}
networkReply->deleteLater();
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if (isCancelled)
return;
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isDownloadFinished = true;
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// Extract gzip compressed archive.
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ui->lblStatus->setText("Installing...");
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z_stream zstream;
zstream.zalloc = Z_NULL;
zstream.zfree = Z_NULL;
zstream.opaque = Z_NULL;
zstream.avail_in = 0;
zstream.next_in = Z_NULL;
int result = inflateInit2(&zstream, 32 | MAX_WBITS);
if (result != Z_OK)
{
ui->lblStatus->setText("zlib inflateInit2 failed");
cancel();
return;
}
patchFile->seek(0);
unzippedPatchFile = new QTemporaryFile;
unzippedPatchFile->open();
const int bufferSize = 32 * 1024;
static char inputBuffer[bufferSize];
static char outputBuffer[bufferSize];
do
{
qint64 bytesRead = patchFile->read(inputBuffer, bufferSize);
if (bytesRead == 0)
break;
zstream.avail_in = bytesRead;
zstream.next_in = (z_Bytef *)inputBuffer;
do
{
zstream.avail_out = bufferSize;
zstream.next_out = (z_Bytef *)outputBuffer;
result = inflate(&zstream, Z_NO_FLUSH);
if (result != Z_OK && result != Z_STREAM_END)
{
ui->lblStatus->setText(QString("zlib error %1").arg(result));
inflateEnd(&zstream);
cancel();
return;
}
unzippedPatchFile->write(outputBuffer, bufferSize - zstream.avail_out);
}
while (zstream.avail_out == 0);
}
while (result != Z_STREAM_END);
inflateEnd(&zstream);
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// Extract all the baseq3 pk3 files in the TAR file.
unzippedPatchFile->seek(0);
int nPaksExtracted = 0;
for (;;)
{
// Read TAR file header (padded to 512 bytes).
TarHeader header;
unzippedPatchFile->read((char *)&header, sizeof(header));
unzippedPatchFile->seek(unzippedPatchFile->pos() + 512 - sizeof(header));
// Convert size from octal string.
qint64 size = 0;
int exponent = 0;
for (int i = sizeof(header.size) - 1; i >= 0; i--)
{
int digit = (int)(header.size[i] - '0');
if (digit < 0 || digit > 7)
continue;
size += qint64(digit * pow(8.0f, exponent));
exponent++;
}
// Extract a pk3 file.
const char *pakPrefix = "baseq3/pak";
if (strncmp(header.name, pakPrefix, strlen(pakPrefix)) == 0)
{
QString filename(field("quake3Path").toString());
filename.append('/');
filename.append(header.name);
QFile file(filename);
if (!file.open(QIODevice::WriteOnly))
{
ui->lblStatus->setText(QString("Error opening '%1' for writing").arg(filename));
cancel();
return;
}
qint64 totalBytesRead = 0;
for (;;)
{
qint64 bytesToRead = bufferSize;
if (totalBytesRead + bytesToRead > size)
{
bytesToRead = size - totalBytesRead;
}
const qint64 bytesRead = unzippedPatchFile->read(outputBuffer, bytesToRead);
if (bytesRead == 0)
break;
file.write(outputBuffer, bytesRead);
totalBytesRead += bytesRead;
}
nPaksExtracted++;
}
else
{
unzippedPatchFile->seek(unzippedPatchFile->pos() + size);
}
// TAR file size is padded to 512 byte blocks.
unzippedPatchFile->seek(unzippedPatchFile->pos() + ((size % 512) == 0 ? 0 : 512 - (size % 512)));
if (nPaksExtracted == 8)
break;
}
isPatchInstalled = true;
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emit completeChanged();
wizard()->next();
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}