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/*
Copyright 2013-2015 Mats Sjöberg
This file is part of the Pumpa programme.
Pumpa is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Pumpa is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
You should have received a copy of the GNU General Public License
along with Pumpa. If not, see <http://www.gnu.org/licenses/>.
*/
#include "filedownloader.h"
#include "pumpa_defines.h"
#include "pumpasettings.h"
#include "util.h"
#ifdef QT5
#include <QStandardPaths>
#else
#include <QDesktopServices>
#endif
#include <QCryptographicHash>
//------------------------------------------------------------------------------
FileDownloadManager* FileDownloadManager::s_instance = NULL;
//------------------------------------------------------------------------------
FileDownloadManager::FileDownloadManager(QObject* parent) : QObject(parent) {
m_nextRequestId = 0;
m_nam = new QNetworkAccessManager(this);
// connect(m_nam, SIGNAL(sslErrors(QNetworkReply*, QList<QSslError>)),
// this, SLOT(onSslErrors(QNetworkReply*, QList<QSslError>)));
m_oam = new KQOAuthManager(this);
connect(m_oam, SIGNAL(authorizedRequestReady(QByteArray, int)),
this, SLOT(onAuthorizedRequestReady(QByteArray, int)));
connect(m_oam, SIGNAL(sslErrors(QNetworkReply*, QList<QSslError>)),
this, SLOT(onSslErrors(QNetworkReply*, QList<QSslError>)));
}
//------------------------------------------------------------------------------
FileDownloadManager* FileDownloadManager::getManager(QObject* parent) {
if (s_instance == NULL && parent != 0)
s_instance = new FileDownloadManager(parent);
return s_instance;
}
//------------------------------------------------------------------------------
void FileDownloadManager::dumpStats() {
// QMap<QString, FileDownloader*> m_inProgress;
QMapIterator<QString, FileDownloader*> it(m_inProgress);
while (it.hasNext()) {
it.next();
qDebug() << "[FILEDOWNLOADMANAGER] in progress" << it.key();
}
// QMap<QString, QString> m_urlMap;
// QMap<int, requestData_t> m_requestMap;
QMapIterator<int, requestData_t> itt(m_requestMap);
while (itt.hasNext()) {
itt.next();
qDebug() << "[FILEDOWNLOADMANAGER] requests" << itt.key();
}
}
//------------------------------------------------------------------------------
bool FileDownloadManager::hasFile(QString url) {
return !fileName(url).isEmpty();
}
//------------------------------------------------------------------------------
QString FileDownloadManager::fileName(QString url) {
QString fn = urlToPath(url);
return QFile::exists(fn) ? fn : "";
}
//------------------------------------------------------------------------------
QPixmap FileDownloadManager::pixmap(QString url, QString brokenImage) {
QString fn = urlToPath(url);
QPixmap pix(fn);
// Sometimes files are given with the wrong file ending, or Qt is
// unable to guess the format so we try to force them into popular
// formats.
if (pix.isNull())
pix.load(fn, "JPEG");
if (pix.isNull())
pix.load(fn, "PNG");
if (pix.isNull())
pix.load(fn, "GIF");
if (pix.isNull() && !brokenImage.isEmpty())
pix.load(brokenImage);
return pix;
}
//------------------------------------------------------------------------------
QMovie* FileDownloadManager::movie(QString url) {
QString fn = urlToPath(url);
QMovie* mov = new QMovie(fn, QByteArray(), this);
mov->setCacheMode(QMovie::CacheAll);
return mov;
}
//------------------------------------------------------------------------------
bool FileDownloadManager::supportsAnimation(QString url) {
QString fn = urlToPath(url);
QImageReader r(fn);
return r.supportsAnimation();
}
//------------------------------------------------------------------------------
QString FileDownloadManager::urlToPath(QString url) {
if (m_urlMap.contains(url))
return m_urlMap[url];
static QCryptographicHash hash(QCryptographicHash::Md5);
static QStringList knownEndings;
if (knownEndings.isEmpty())
knownEndings << ".png" << ".jpeg" << ".jpg" << ".gif";
if (m_cacheDir.isEmpty()) {
m_cacheDir =
#ifdef QT5
QStandardPaths::writableLocation(QStandardPaths::CacheLocation);
#else
QDesktopServices::storageLocation(QDesktopServices::CacheLocation);
#endif
if (m_cacheDir.isEmpty())
m_cacheDir = slashify(QDir::homePath())+".cache/";
else
m_cacheDir = slashify(m_cacheDir);
m_cacheDir += "pumpa/";
}
QString path = m_cacheDir;
QDir d;
d.mkpath(path);
QString ending;
for (int i=0; i<knownEndings.count() && ending.isEmpty(); i++)
if (url.endsWith(knownEndings[i]))
ending = knownEndings[i];
if (ending.isEmpty())
ending = ".png";
hash.reset();
hash.addData(url.toUtf8());
QString hashStr = hash.result().toHex();
QString ret = path + hashStr + ending;
m_urlMap.insert(url, ret);
return ret;
}
//------------------------------------------------------------------------------
FileDownloader* FileDownloadManager::download(QString url) {
if (m_inProgress.contains(url))
return m_inProgress[url];
#ifdef DEBUG_NET
qDebug() << "[DOWNLOAD]" << url;
#endif
FileDownloader* fd = new FileDownloader(url, this);
m_inProgress.insert(url, fd);
connect(fd, SIGNAL(fileReady()), this, SLOT(onFileReady()));
connect(fd, SIGNAL(networkError(QString)), this, SLOT(onFileReady(QString)));
return fd;
}
//------------------------------------------------------------------------------
void FileDownloadManager::executeAuthorizedRequest(KQOAuthRequest* oar,
FileDownloader* fd) {
int id = m_nextRequestId++;
if (m_nextRequestId > 32000) { // bound to be smaller than any MAX_INT
m_nextRequestId = 0;
while (m_requestMap.contains(m_nextRequestId))
m_nextRequestId++;
}
m_requestMap.insert(id, qMakePair(oar, fd));
m_oam->executeAuthorizedRequest(oar, id);
}
//------------------------------------------------------------------------------
void FileDownloadManager::onSslErrors(QNetworkReply* nr, QList<QSslError>) {
(void) nr; // suppress unused warning
#ifdef DEBUG_NET
qDebug() << "FileDownloadManager SSL ERROR" << nr->url();
#endif
}
//------------------------------------------------------------------------------
void FileDownloadManager::onAuthorizedRequestReady(QByteArray response,
int id) {
QPair<KQOAuthRequest*, FileDownloader*> rp = m_requestMap.take(id);
KQOAuthRequest* oar = rp.first;
FileDownloader* fd = rp.second;
fd->requestReady(response, oar);
}
//------------------------------------------------------------------------------
void FileDownloadManager::onFileReady(QString) {
FileDownloader *fd = qobject_cast<FileDownloader*>(sender());
if (!fd)
return;
m_inProgress.remove(fd->url());
fd->deleteLater();
}
//------------------------------------------------------------------------------
FileDownloader::FileDownloader(QString url, FileDownloadManager* fdm) :
QObject(fdm),
m_url(url),
m_oar(NULL),
m_redirs(0),
m_fdm(fdm)
{
PumpaSettings* ps = PumpaSettings::getSettings();
if (ps && m_url.startsWith(ps->siteUrl())) {
m_oar = new KQOAuthRequest(this);
m_oar->initRequest(KQOAuthRequest::AuthorizedRequest, QUrl(m_url));
m_oar->setConsumerKey(ps->clientId());
m_oar->setConsumerSecretKey(ps->clientSecret());
m_oar->setToken(ps->token());
m_oar->setTokenSecret(ps->tokenSecret());
m_oar->setHttpMethod(KQOAuthRequest::GET);
m_oar->setTimeout(60000); // one minute time-out
m_fdm->executeAuthorizedRequest(m_oar, this);
} else {
QNetworkReply* nr = m_fdm->m_nam->get(QNetworkRequest(QUrl(m_url)));
connect(nr, SIGNAL(finished()), this, SLOT(replyFinished()));
}
}
//------------------------------------------------------------------------------
void FileDownloader::replyFinished() {
QNetworkReply *nr = qobject_cast<QNetworkReply *>(sender());
QString url = nr->url().toString();
int status = nr->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
if (nr->error()) {
emit networkError(tr("Network error: ")+nr->errorString());
nr->deleteLater();
return;
}
if (status >= 301 && status <= 399) {
if (m_redirs > 5) {
emit networkError(tr("Network error: too many redirections!"));
nr->deleteLater();
return;
}
QUrl newUrl = nr->attribute(QNetworkRequest::RedirectionTargetAttribute).toUrl();
m_redirs++;
QNetworkReply* nr2 = m_fdm->m_nam->get(QNetworkRequest(nr->url().resolved(newUrl)));
connect(nr2, SIGNAL(finished()), this, SLOT(replyFinished()));
nr->deleteLater();
return;
}
requestReady(nr->readAll(), NULL);
nr->deleteLater();
}
//------------------------------------------------------------------------------
void FileDownloader::requestReady(QByteArray response, KQOAuthRequest* oar) {
if (oar != NULL && m_fdm->m_oam->lastError()) {
emit networkError(QString(tr("Unable to download %1 (Error #%2)."))
.arg(m_url)
.arg(m_fdm->m_oam->lastError()));
return;
}
QString fn = m_fdm->urlToPath(m_url);
QFile* fp = new QFile(fn);
if (!fp->open(QIODevice::WriteOnly)) {
emit networkError(QString(tr("Could not open file %1 for writing: ")).
arg(fn) + fp->errorString());
delete fp;
return;
}
fp->write(response);
fp->close();
delete fp;
QPixmap pix = m_fdm->pixmap(m_url);
resizeImage(pix, fn);
emit fileReady();
}
//------------------------------------------------------------------------------
void FileDownloader::resizeImage(QPixmap pix, QString fn) {
if (pix.isNull())
return;
int w = pix.width();
int h = pix.height();
if (w <= IMAGE_MAX_WIDTH && h <= IMAGE_MAX_HEIGHT)
return;
QPixmap newPix;
if (w > h)
newPix = pix.scaledToWidth(IMAGE_MAX_WIDTH);
else
newPix = pix.scaledToHeight(IMAGE_MAX_HEIGHT);
newPix.save(fn);
}
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