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#include "RemoteFile.hpp"
#include <utility>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QDir>
#include <QByteArray>
#include "moc_RemoteFile.cpp"
RemoteFile::RemoteFile (ListenerInterface * listener, QNetworkAccessManager * network_manager
, QString const& local_file_path, bool http_only, QObject * parent)
: QObject {parent}
, listener_ {listener}
, network_manager_ {network_manager}
, local_file_ {local_file_path}
, http_only_ {http_only}
, is_valid_ {false}
, redirect_count_ {0}
, file_ {local_file_path}
{
local_file_.setCaching (false);
}
void RemoteFile::local_file_path (QString const& name)
{
QFileInfo new_file {name};
new_file.setCaching (false);
if (new_file != local_file_)
{
if (local_file_.exists ())
{
QFile file {local_file_.absoluteFilePath ()};
if (!file.rename (new_file.absoluteFilePath ()))
{
if (listener_)
{
listener_->error (tr ("File System Error")
, tr ("Cannot rename file:\n\"%1\"\nto: \"%2\"\nError(%3): %4")
.arg (file.fileName ())
.arg (new_file.absoluteFilePath ())
.arg (file.error ())
.arg (file.errorString ()));
}
}
}
std::swap (local_file_, new_file);
}
}
bool RemoteFile::local () const
{
auto is_local = (reply_ && !reply_->isFinished ()) || local_file_.exists ();
if (listener_)
{
if (is_local)
{
auto size = local_file_.size ();
listener_->download_progress (size, size);
listener_->download_finished (true);
}
else
{
listener_->download_progress (-1, 0);
}
}
return is_local;
}
bool RemoteFile::sync (QUrl const& url, bool local, bool force)
{
if (local)
{
if (!reply_ || reply_->isFinished ()) // not active download
{
if (force || !local_file_.exists () || url != url_)
{
url_ = url;
redirect_count_ = 0;
Q_ASSERT (!is_valid_);
download (url_);
}
}
else
{
return false;
}
}
else
{
if (reply_ && reply_->isRunning ())
{
reply_->abort ();
}
if (local_file_.exists ())
{
auto path = local_file_.absoluteDir ();
if (path.remove (local_file_.fileName ()))
{
if (listener_)
{
listener_->download_progress (-1, 0);
}
}
else
{
if (listener_)
{
listener_->error (tr ("File System Error")
, tr ("Cannot delete file:\n\"%1\"")
.arg (local_file_.absoluteFilePath ()));
}
return false;
}
path.rmpath (".");
}
}
return true;
}
void RemoteFile::download (QUrl url)
{
#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
if (QNetworkAccessManager::Accessible != network_manager_->networkAccessible ()) {
// try and recover network access for QNAM
network_manager_->setNetworkAccessible (QNetworkAccessManager::Accessible);
}
#endif
if (url.isValid () && (!QSslSocket::supportsSsl () || http_only_))
{
url.setScheme ("http");
}
QNetworkRequest request {url};
request.setRawHeader ("User-Agent", "WSJT Sample Downloader");
request.setOriginatingObject (this);
// this blocks for a second or two the first time it is used on
// Windows - annoying
if (!is_valid_)
{
reply_ = network_manager_->head (request);
}
else
{
reply_ = network_manager_->get (request);
}
connect (reply_.data (), &QNetworkReply::finished, this, &RemoteFile::reply_finished);
connect (reply_.data (), &QNetworkReply::readyRead, this, &RemoteFile::store);
connect (reply_.data (), &QNetworkReply::downloadProgress
, [this] (qint64 bytes_received, qint64 total_bytes) {
if (listener_)
{
// report progress of wanted file
if (is_valid_)
{
listener_->download_progress (bytes_received, total_bytes);
}
}
});
}
void RemoteFile::abort ()
{
if (reply_ && reply_->isRunning ())
{
reply_->abort ();
}
}
void RemoteFile::reply_finished ()
{
if (!reply_) return; // we probably deleted it in an
// earlier call
QUrl redirect_url {reply_->attribute (QNetworkRequest::RedirectionTargetAttribute).toUrl ()};
if (reply_->error () == QNetworkReply::NoError && !redirect_url.isEmpty ())
{
if (!listener_ || listener_->redirect_request (redirect_url))
{
if (++redirect_count_ < 10) // maintain sanity
{
// follow redirect
download (reply_->url ().resolved (redirect_url));
}
else
{
if (listener_)
{
listener_->download_finished (false);
listener_->error (tr ("Network Error")
, tr ("Too many redirects: %1")
.arg (redirect_url.toDisplayString ()));
}
is_valid_ = false; // reset
}
}
else
{
if (listener_)
{
listener_->download_finished (false);
listener_->error (tr ("Network Error")
, tr ("Redirect not followed: %1")
.arg (redirect_url.toDisplayString ()));
}
is_valid_ = false; // reset
}
}
else if (reply_->error () != QNetworkReply::NoError)
{
file_.cancelWriting ();
file_.commit ();
if (listener_)
{
listener_->download_finished (false);
}
is_valid_ = false; // reset
// report errors that are not due to abort
if (listener_ && QNetworkReply::OperationCanceledError != reply_->error ())
{
listener_->error (tr ("Network Error"), reply_->errorString ());
}
}
else
{
auto path = QFileInfo {file_.fileName ()}.absoluteDir ();
if (is_valid_ && !file_.commit ())
{
if (listener_)
{
listener_->error (tr ("File System Error")
, tr ("Cannot commit changes to:\n\"%1\"")
.arg (file_.fileName ()));
}
path.rmpath ("."); // tidy empty directories
if (listener_)
{
listener_->download_finished (false);
}
is_valid_ = false; // reset
}
else
{
if (!is_valid_)
{
// now get the body content
is_valid_ = true;
download (reply_->url ().resolved (redirect_url));
}
else
{
if (listener_)
{
listener_->download_finished (true);
}
is_valid_ = false; // reset
}
}
}
if (reply_ && reply_->isFinished ())
{
reply_->deleteLater ();
}
}
void RemoteFile::store ()
{
if (is_valid_)
{
if (!file_.isOpen ())
{
// create temporary file in the final location
auto path = QFileInfo {file_.fileName ()}.absoluteDir ();
if (path.mkpath ("."))
{
if (!file_.open (QSaveFile::WriteOnly))
{
abort ();
if (listener_)
{
listener_->error (tr ("File System Error")
, tr ("Cannot open file:\n\"%1\"\nError(%2): %3")
.arg (path.path ())
.arg (file_.error ())
.arg (file_.errorString ()));
}
}
}
else
{
abort ();
if (listener_)
{
listener_->error (tr ("File System Error")
, tr ("Cannot make path:\n\"%1\"")
.arg (path.path ()));
}
}
}
if (file_.write (reply_->read (reply_->bytesAvailable ())) < 0)
{
abort ();
if (listener_)
{
listener_->error (tr ("File System Error")
, tr ("Cannot write to file:\n\"%1\"\nError(%2): %3")
.arg (file_.fileName ())
.arg (file_.error ())
.arg (file_.errorString ()));
}
}
}
}
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