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first implementation of image only download

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Blue 2019-09-17 18:16:09 +03:00
parent 59f539c460
commit 94a3766aaf
10 changed files with 359 additions and 22 deletions
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core/networkaccess.cpp Normal file
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/*
* Squawk messenger.
* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "networkaccess.h"
Core::NetworkAccess::NetworkAccess(QObject* parent):
QObject(parent),
running(false),
manager(),
files("files"),
downloads()
{
}
Core::NetworkAccess::~NetworkAccess()
{
}
void Core::NetworkAccess::fileLocalPathRequest(const QString& messageId, const QString& url)
{
std::map<QString, Download*>::iterator itr = downloads.find(url);
if (itr != downloads.end()) {
Download* dwn = itr->second;
std::set<QString>::const_iterator mItr = dwn->messages.find(messageId);
if (mItr == dwn->messages.end()) {
dwn->messages.insert(messageId);
}
emit downloadFileProgress(messageId, dwn->progress);
} else {
try {
QString path = files.getRecord(url);
QFileInfo info(path);
if (info.exists() && info.isFile()) {
emit fileLocalPathResponse(messageId, path);
} else {
files.removeRecord(url);
emit fileLocalPathResponse(messageId, "");
}
} catch (Archive::NotFound e) {
emit fileLocalPathResponse(messageId, "");
} catch (Archive::Unknown e) {
qDebug() << "Error requesting file path:" << e.what();
emit fileLocalPathResponse(messageId, "");
}
}
}
void Core::NetworkAccess::downladFileRequest(const QString& messageId, const QString& url)
{
std::map<QString, Download*>::iterator itr = downloads.find(url);
if (itr != downloads.end()) {
Download* dwn = itr->second;
std::set<QString>::const_iterator mItr = dwn->messages.find(messageId);
if (mItr == dwn->messages.end()) {
dwn->messages.insert(messageId);
}
emit downloadFileProgress(messageId, dwn->progress);
} else {
try {
QString path = files.getRecord(url);
QFileInfo info(path);
if (info.exists() && info.isFile()) {
emit fileLocalPathResponse(messageId, path);
} else {
files.removeRecord(url);
startDownload(messageId, url);
}
} catch (Archive::NotFound e) {
startDownload(messageId, url);
} catch (Archive::Unknown e) {
qDebug() << "Error requesting file path:" << e.what();
startDownload(messageId, url);
}
}
}
void Core::NetworkAccess::start()
{
if (!running) {
files.open();
running = true;
}
}
void Core::NetworkAccess::stop()
{
if (running) {
files.close();
running = false;
}
}
void Core::NetworkAccess::onDownloadProgress(qint64 bytesReceived, qint64 bytesTotal)
{
QNetworkReply* rpl = static_cast<QNetworkReply*>(sender());
QString url = rpl->url().toString();
std::map<QString, Download*>::const_iterator itr = downloads.find(url);
if (itr == downloads.end()) {
qDebug() << "an error downloading" << url << ": the request had some progress but seems like noone is waiting for it, skipping";
} else {
Download* dwn = itr->second;
for (std::set<QString>::const_iterator mItr = dwn->messages.begin(), end = dwn->messages.end(); mItr != end; ++mItr) {
emit downloadFileProgress(*mItr, bytesReceived/bytesTotal);
}
}
}
void Core::NetworkAccess::onRequestError(QNetworkReply::NetworkError code)
{
QNetworkReply* rpl = static_cast<QNetworkReply*>(sender());
QString url = rpl->url().toString();
std::map<QString, Download*>::const_iterator itr = downloads.find(url);
if (itr == downloads.end()) {
qDebug() << "an error downloading" << url << ": the request is reporting an error but seems like noone is waiting for it, skipping";
} else {
itr->second->success = false;
}
}
void Core::NetworkAccess::onRequestFinished()
{
QString path("");
QNetworkReply* rpl = static_cast<QNetworkReply*>(sender());
QString url = rpl->url().toString();
std::map<QString, Download*>::const_iterator itr = downloads.find(url);
if (itr == downloads.end()) {
qDebug() << "an error downloading" << url << ": the request is done but seems like noone is waiting for it, skipping";
} else {
Download* dwn = itr->second;
if (dwn->success) {
qDebug() << "download success for" << url;
QStringList hops = url.split("/");
QString fileName = hops.back();
QStringList parts = fileName.split(".");
path = QStandardPaths::writableLocation(QStandardPaths::DownloadLocation);
QString suffix("");
QString realName = parts.front();
for (QStringList::const_iterator sItr = (parts.begin()++), sEnd = parts.end(); sItr != sEnd; ++sItr) {
suffix += "." + (*sItr);
}
QString postfix("");
QFileInfo proposedName(path + realName + postfix + suffix);
int counter = 0;
while (proposedName.exists()) {
suffix = QString("(") + std::to_string(++counter).c_str() + ")";
proposedName = QFileInfo(path + realName + postfix + suffix);
}
path = proposedName.absoluteFilePath();
QFile file(path);
if (file.open(QIODevice::WriteOnly)) {
file.write(dwn->reply->readAll());
file.close();
files.addRecord(url, path);
qDebug() << "file" << path << "was successfully downloaded";
} else {
qDebug() << "couldn't save file" << path;
path = "";
}
}
for (std::set<QString>::const_iterator mItr = dwn->messages.begin(), end = dwn->messages.end(); mItr != end; ++mItr) {
emit fileLocalPathResponse(*mItr, path);
}
dwn->reply->deleteLater();
delete dwn;
downloads.erase(itr);
}
}
void Core::NetworkAccess::startDownload(const QString& messageId, const QString& url)
{
Download* dwn = new Download({{messageId}, 0, 0, true});
QNetworkRequest req(url);
dwn->reply = manager.get(req);
connect(dwn->reply, SIGNAL(downloadProgress(qint64, qint64)), SLOT(onDownloadProgress(qint64, qint64)));
connect(dwn->reply, SIGNAL(error(QNetworkReply::NetworkError)), SLOT(onRequestError(QNetworkReply::NetworkError)));
connect(dwn->reply, SIGNAL(finished()), SLOT(onRequestFinished()));
downloads.insert(std::make_pair(url, dwn));
emit downloadFileProgress(messageId, 0);
}