--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/util/src/network/access/qnetworkaccessfilebackend.cpp Wed Mar 31 11:06:36 2010 +0300
@@ -0,0 +1,275 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtNetwork module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qnetworkaccessfilebackend_p.h"
+#include "qfileinfo.h"
+#include "qurlinfo.h"
+#include "qdir.h"
+#include "private/qnoncontiguousbytedevice_p.h"
+
+#include <QtCore/QCoreApplication>
+
+QT_BEGIN_NAMESPACE
+
+QNetworkAccessBackend *
+QNetworkAccessFileBackendFactory::create(QNetworkAccessManager::Operation op,
+ const QNetworkRequest &request) const
+{
+ // is it an operation we know of?
+ switch (op) {
+ case QNetworkAccessManager::GetOperation:
+ case QNetworkAccessManager::PutOperation:
+ break;
+
+ default:
+ // no, we can't handle this operation
+ return 0;
+ }
+
+ QUrl url = request.url();
+ if (url.scheme() == QLatin1String("qrc") || !url.toLocalFile().isEmpty())
+ return new QNetworkAccessFileBackend;
+ else if (!url.isEmpty() && url.authority().isEmpty()) {
+ // check if QFile could, in theory, open this URL
+ QFileInfo fi(url.toString(QUrl::RemoveAuthority | QUrl::RemoveFragment | QUrl::RemoveQuery));
+ if (fi.exists() || (op == QNetworkAccessManager::PutOperation && fi.dir().exists()))
+ return new QNetworkAccessFileBackend;
+ }
+
+ return 0;
+}
+
+QNetworkAccessFileBackend::QNetworkAccessFileBackend()
+ : uploadByteDevice(0), totalBytes(0), hasUploadFinished(false)
+{
+}
+
+QNetworkAccessFileBackend::~QNetworkAccessFileBackend()
+{
+}
+
+void QNetworkAccessFileBackend::open()
+{
+ QUrl url = this->url();
+
+ if (url.host() == QLatin1String("localhost"))
+ url.setHost(QString());
+#if !defined(Q_OS_WIN)
+ // do not allow UNC paths on Unix
+ if (!url.host().isEmpty()) {
+ // we handle only local files
+ error(QNetworkReply::ProtocolInvalidOperationError,
+ QCoreApplication::translate("QNetworkAccessFileBackend", "Request for opening non-local file %1").arg(url.toString()));
+ finished();
+ return;
+ }
+#endif // !defined(Q_OS_WIN)
+ if (url.path().isEmpty())
+ url.setPath(QLatin1String("/"));
+ setUrl(url);
+
+ QString fileName = url.toLocalFile();
+ if (fileName.isEmpty()) {
+ if (url.scheme() == QLatin1String("qrc"))
+ fileName = QLatin1Char(':') + url.path();
+ else
+ fileName = url.toString(QUrl::RemoveAuthority | QUrl::RemoveFragment | QUrl::RemoveQuery);
+ }
+ file.setFileName(fileName);
+
+ if (operation() == QNetworkAccessManager::GetOperation) {
+ if (!loadFileInfo())
+ return;
+ }
+
+ QIODevice::OpenMode mode;
+ switch (operation()) {
+ case QNetworkAccessManager::GetOperation:
+ mode = QIODevice::ReadOnly;
+ break;
+ case QNetworkAccessManager::PutOperation:
+ mode = QIODevice::WriteOnly | QIODevice::Truncate;
+ uploadByteDevice = createUploadByteDevice();
+ QObject::connect(uploadByteDevice, SIGNAL(readyRead()), this, SLOT(uploadReadyReadSlot()));
+ QMetaObject::invokeMethod(this, "uploadReadyReadSlot", Qt::QueuedConnection);
+ break;
+ default:
+ Q_ASSERT_X(false, "QNetworkAccessFileBackend::open",
+ "Got a request operation I cannot handle!!");
+ return;
+ }
+
+ mode |= QIODevice::Unbuffered;
+ bool opened = file.open(mode);
+
+ // could we open the file?
+ if (!opened) {
+ QString msg = QCoreApplication::translate("QNetworkAccessFileBackend", "Error opening %1: %2")
+ .arg(this->url().toString(), file.errorString());
+
+ // why couldn't we open the file?
+ // if we're opening for reading, either it doesn't exist, or it's access denied
+ // if we're opening for writing, not existing means it's access denied too
+ if (file.exists() || operation() == QNetworkAccessManager::PutOperation)
+ error(QNetworkReply::ContentAccessDenied, msg);
+ else
+ error(QNetworkReply::ContentNotFoundError, msg);
+ finished();
+ }
+}
+
+void QNetworkAccessFileBackend::uploadReadyReadSlot()
+{
+ if (hasUploadFinished)
+ return;
+
+ forever {
+ qint64 haveRead;
+ const char *readPointer = uploadByteDevice->readPointer(-1, haveRead);
+ if (haveRead == -1) {
+ // EOF
+ hasUploadFinished = true;
+ file.flush();
+ file.close();
+ finished();
+ break;
+ } else if (haveRead == 0 || readPointer == 0) {
+ // nothing to read right now, we will be called again later
+ break;
+ } else {
+ qint64 haveWritten;
+ haveWritten = file.write(readPointer, haveRead);
+
+ if (haveWritten < 0) {
+ // write error!
+ QString msg = QCoreApplication::translate("QNetworkAccessFileBackend", "Write error writing to %1: %2")
+ .arg(url().toString(), file.errorString());
+ error(QNetworkReply::ProtocolFailure, msg);
+
+ finished();
+ return;
+ } else {
+ uploadByteDevice->advanceReadPointer(haveWritten);
+ }
+
+
+ file.flush();
+ }
+ }
+}
+
+void QNetworkAccessFileBackend::closeDownstreamChannel()
+{
+ if (operation() == QNetworkAccessManager::GetOperation) {
+ file.close();
+ }
+}
+
+bool QNetworkAccessFileBackend::waitForDownstreamReadyRead(int)
+{
+ Q_ASSERT(operation() == QNetworkAccessManager::GetOperation);
+ return readMoreFromFile();
+}
+
+void QNetworkAccessFileBackend::downstreamReadyWrite()
+{
+ Q_ASSERT_X(operation() == QNetworkAccessManager::GetOperation, "QNetworkAccessFileBackend",
+ "We're being told to download data but operation isn't GET!");
+
+ readMoreFromFile();
+}
+
+bool QNetworkAccessFileBackend::loadFileInfo()
+{
+ QFileInfo fi(file);
+ setHeader(QNetworkRequest::LastModifiedHeader, fi.lastModified());
+ setHeader(QNetworkRequest::ContentLengthHeader, fi.size());
+
+ // signal we're open
+ metaDataChanged();
+
+ if (fi.isDir()) {
+ error(QNetworkReply::ContentOperationNotPermittedError,
+ QCoreApplication::translate("QNetworkAccessFileBackend", "Cannot open %1: Path is a directory").arg(url().toString()));
+ finished();
+ return false;
+ }
+
+ return true;
+}
+
+bool QNetworkAccessFileBackend::readMoreFromFile()
+{
+ qint64 wantToRead;
+ while ((wantToRead = nextDownstreamBlockSize()) > 0) {
+ // ### FIXME!!
+ // Obtain a pointer from the ringbuffer!
+ // Avoid extra copy
+ QByteArray data;
+ data.reserve(wantToRead);
+ qint64 actuallyRead = file.read(data.data(), wantToRead);
+ if (actuallyRead <= 0) {
+ // EOF or error
+ if (file.error() != QFile::NoError) {
+ QString msg = QCoreApplication::translate("QNetworkAccessFileBackend", "Read error reading from %1: %2")
+ .arg(url().toString(), file.errorString());
+ error(QNetworkReply::ProtocolFailure, msg);
+
+ finished();
+ return false;
+ }
+
+ finished();
+ return true;
+ }
+
+ data.resize(actuallyRead);
+ totalBytes += actuallyRead;
+
+ QByteDataBuffer list;
+ list.append(data);
+ data.clear(); // important because of implicit sharing!
+ writeDownstreamData(list);
+ }
+ return true;
+}
+
+QT_END_NAMESPACE