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#include "FileDownload.hpp"
#include <QCoreApplication>
#include <QUrl>
#include <QNetworkRequest>
#include <QtNetwork/QNetworkAccessManager>
#include <QtNetwork/QNetworkReply>
#include <QFileInfo>
#include <QDir>
#include <QIODevice>
#include "qt_helpers.hpp"
#include "Logger.hpp"
FileDownload::FileDownload() : QObject(nullptr)
{
redirect_count_ = 0;
url_valid_ = false;
}
FileDownload::~FileDownload()
{
}
#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
void FileDownload::errorOccurred(QNetworkReply::NetworkError code)
{
LOG_INFO(QString{"FileDownload [%1]: errorOccurred %2 -> %3"}.arg(user_agent_).arg(code).arg(reply_->errorString()));
Q_EMIT error (reply_->errorString ());
destfile_.cancelWriting ();
destfile_.commit ();
}
#else
void FileDownload::obsoleteError()
{
LOG_INFO(QString{"FileDownload [%1]: error -> %3"}.arg(user_agent_).arg(reply_->errorString()));
Q_EMIT error (reply_->errorString ());
destfile_.cancelWriting ();
destfile_.commit ();
}
#endif
void FileDownload::configure(QNetworkAccessManager *network_manager, const QString &source_url, const QString &destination_path, const QString &user_agent)
{
manager_ = network_manager;
source_url_ = source_url;
destination_filename_ = destination_path;
user_agent_ = user_agent;
}
void FileDownload::store()
{
if (destfile_.isOpen())
destfile_.write (reply_->read (reply_->bytesAvailable ()));
else
LOG_INFO(QString{ "FileDownload [%1]: file is not open."}.arg(user_agent_));
}
void FileDownload::replyComplete()
{
QFileInfo destination_file(destination_filename_);
QDir tmpdir_(destination_file.absoluteFilePath());
LOG_DEBUG(QString{ "FileDownload [%1]: replyComplete"}.arg(user_agent_));
if (!reply_)
{
Q_EMIT load_finished ();
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 ("https" == redirect_url.scheme () && !QSslSocket::supportsSsl ())
{
Q_EMIT download_error (tr ("Network Error - SSL/TLS support not installed, cannot fetch:\n\'%1\'")
.arg (redirect_url.toDisplayString ()));
url_valid_ = false; // reset
Q_EMIT load_finished ();
}
else if (++redirect_count_ < 10) // maintain sanity
{
// follow redirect
download (reply_->url ().resolved (redirect_url));
}
else
{
Q_EMIT download_error (tr ("Network Error - Too many redirects:\n\'%1\'")
.arg (redirect_url.toDisplayString ()));
url_valid_ = false; // reset
Q_EMIT load_finished ();
}
}
else if (reply_->error () != QNetworkReply::NoError)
{
destfile_.cancelWriting();
destfile_.commit();
url_valid_ = false; // reset
// report errors that are not due to abort
if (QNetworkReply::OperationCanceledError != reply_->error ())
{
Q_EMIT download_error (tr ("Network Error:\n%1")
.arg (reply_->errorString ()));
}
Q_EMIT load_finished ();
}
else
{
if (!url_valid_)
{
// now get the body content
url_valid_ = true;
download (reply_->url ().resolved (redirect_url));
}
else // the body has completed. Save it.
{
url_valid_ = false; // reset
// load the database asynchronously
// future_load_ = std::async (std::launch::async, &LotWUsers::impl::load_dictionary, this, csv_file_.fileName ());
LOG_INFO(QString{ "FileDownload [%1]: complete. File path is %2"}.arg(user_agent_).arg(destfile_.fileName()));
destfile_.commit();
emit complete(destination_filename_);
}
}
if (reply_ && reply_->isFinished ())
{
reply_->deleteLater ();
}
}
void FileDownload::downloadComplete(QNetworkReply *data)
{
// make a temp file in the same place as the file we're downloading. Needs to be on the same
// filesystem as where we eventually want to 'mv' it.
QUrl r = request_.url();
LOG_INFO(QString{"FileDownload [%1]: finished %2 of %3 -> %4 (%5)"}.arg(user_agent_).arg(data->operation()).arg(source_url_).arg(destination_filename_).arg(r.url()));
#ifdef DEBUG_FILEDOWNLOAD
LOG_INFO("Request Headers:");
Q_FOREACH (const QByteArray& hdr, request_.rawHeaderList()) {
LOG_INFO(QString{ "%1 -> %2"}.arg(QString(hdr)).arg(QString(request_.rawHeader(hdr))));
}
LOG_INFO("Response Headers:");
Q_FOREACH (const QByteArray& hdr, reply_->rawHeaderList()) {
LOG_INFO(QString{ "%1 -> %2"}.arg(QString(hdr)).arg(QString(reply_->rawHeader(hdr))));
}
#endif
data->deleteLater();
}
void FileDownload::start_download()
{
url_valid_ = false;
download(QUrl(source_url_));
}
void FileDownload::download(QUrl qurl)
{
request_.setUrl(qurl);
#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
if (QNetworkAccessManager::Accessible != manager_->networkAccessible ())
{
// try and recover network access for QNAM
manager_->setNetworkAccessible (QNetworkAccessManager::Accessible);
}
#endif
LOG_INFO(QString{"FileDownload [%1]: Starting download of %2 to %3"}.arg(user_agent_).arg(source_url_).arg(destination_filename_));
request_.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
request_.setRawHeader("Accept", "*/*");
request_.setRawHeader ("User-Agent", user_agent_.toLocal8Bit()); // Must have a UA for some sites, like country-files
if (!url_valid_)
{
reply_ = manager_->head(request_);
}
else
{
reply_ = manager_->get (request_);
}
QObject::connect(manager_, &QNetworkAccessManager::finished, this, &FileDownload::downloadComplete, Qt::UniqueConnection);
QObject::connect(reply_, &QNetworkReply::downloadProgress, this, &FileDownload::downloadProgress, Qt::UniqueConnection);
QObject::connect(reply_, &QNetworkReply::finished, this, &FileDownload::replyComplete, Qt::UniqueConnection);
#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
QObject::connect(reply_, &QNetworkReply::errorOccurred,this, &FileDownload::errorOccurred, Qt::UniqueConnection);
#else
QObject::connect(reply_, QOverload<QNetworkReply::NetworkError>::of(&QNetworkReply::error), this, &FileDownload::obsoleteError, Qt::UniqueConnection);
#endif
QObject::connect(reply_, &QNetworkReply::readyRead, this, &FileDownload::store, Qt::UniqueConnection);
QFileInfo destination_file(destination_filename_);
QString const tmpfile_base = destination_file.fileName();
QString const &tmpfile_path = destination_file.absolutePath();
QDir tmpdir{};
if (!tmpdir.mkpath(tmpfile_path))
{
LOG_INFO(QString{"FileDownload [%1]: Directory %2 does not exist"}.arg(user_agent_).arg(tmpfile_path).arg(
destfile_.errorString()));
}
if (url_valid_) {
destfile_.setFileName(destination_file.absoluteFilePath());
if (!destfile_.open(QSaveFile::WriteOnly | QIODevice::WriteOnly)) {
LOG_INFO(QString{"FileDownload [%1]: Unable to open %2: %3"}.arg(user_agent_).arg(destfile_.fileName()).arg(
destfile_.errorString()));
return;
}
}
}
void FileDownload::downloadProgress(qint64 received, qint64 total)
{
LOG_DEBUG(QString{"FileDownload: [%1] Progress %2 from %3, total %4, so far %5"}.arg(user_agent_).arg(destination_filename_).arg(source_url_).arg(total).arg(received));
Q_EMIT progress(QString{"%4 bytes downloaded"}.arg(received));
}
void FileDownload::abort ()
{
if (reply_ && reply_->isRunning ())
{
reply_->abort ();
}
}
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