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#include <Network/Downloader.h>
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#include <memory>
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#include <QNetworkRequest>
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#include <QNetworkReply>
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#include <QNetworkAccessManager>
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#include <QAuthenticator>
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#include <QVariant>
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#include <QHash>
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#include <QPair>
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#include <QCoreApplication>
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#include <QReadWriteLock>
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class Downloader::p_Downloader
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{
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using login_pair=QPair<QString,QString>;
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QNetworkAccessManager manager;
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QHash<QString,login_pair> auth;
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QReadWriteLock pending_requests_lock;
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QHash<QUuid,QNetworkReply*> pending_requests;
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QNetworkRequest buildRequest(const QString& url, const QString &user="", const QString &passwd="")
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{
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QNetworkRequest request;
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request.setUrl(QUrl(url));
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request.setRawHeader("User-Agent", "SciQLop 1.0");
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if(user!="" and passwd!="")
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{
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//might grow quickly since we can have tons of URLs for the same host
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auth[url]=login_pair(user,passwd);
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QString login = "Basic "+user+":"+passwd;
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request.setRawHeader("Authorization",login.toLocal8Bit());
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}
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return request;
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}
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public:
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explicit p_Downloader()
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{
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auto login_bambda = [this](QNetworkReply * reply, QAuthenticator * authenticator)
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{
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if(auth.contains(reply->url().toString()))
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{
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auto login = auth[reply->url().toString()];
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authenticator->setUser(login.first);
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authenticator->setPassword(login.second);
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}
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};
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QObject::connect(&manager, &QNetworkAccessManager::authenticationRequired, login_bambda);
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}
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Response get(const QString& url, const QString &user="", const QString &passwd="")
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{
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QNetworkRequest request = buildRequest(url, user, passwd);
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QNetworkReply *reply = manager.get(request);
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while (!reply->isFinished())
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QCoreApplication::processEvents();
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QVariant status_code = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
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Response resp = Response(reply->readAll(), status_code.toInt());
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delete reply;
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if(user!="" and passwd!="")
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auth.remove(url);
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return resp;
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}
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QUuid getAsync(const QString &url, std::function<void (QUuid ,Response)> callback, const QString &user, const QString &passwd)
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{
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auto uuid = QUuid::createUuid();
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QNetworkRequest request = buildRequest(url, user, passwd);
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QNetworkReply *reply = manager.get(request);
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auto callback_wrapper = [url, uuid, callback, this](){
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QNetworkReply* reply;
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{
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QWriteLocker locker(&pending_requests_lock);
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reply = pending_requests.take(uuid);
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}
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QVariant status_code = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
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Response resp = Response(reply->readAll(), status_code.toInt());
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auth.remove(url);
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delete reply;
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callback(uuid, resp);
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};
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QObject::connect(reply, &QNetworkReply::finished, callback_wrapper);
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{
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QWriteLocker locker(&pending_requests_lock);
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pending_requests[uuid] = reply;
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}
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return uuid;
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}
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bool downloadFinished(QUuid uuid)
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{
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QReadLocker locker(&pending_requests_lock);
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if(pending_requests.contains(uuid))
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{
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auto req = pending_requests[uuid];
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return req->isFinished();
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}
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return true;
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}
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};
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Response Downloader::get(const QString &url, const QString &user, const QString &passwd)
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{
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return Downloader::instance().impl->get(url, user, passwd);
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}
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QUuid Downloader::getAsync(const QString &url, std::function<void (QUuid ,Response)> callback, const QString &user, const QString &passwd)
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{
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return Downloader::instance().impl->getAsync(url, callback, user, passwd);
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}
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bool Downloader::downloadFinished(QUuid uuid)
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{
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return Downloader::instance().impl->downloadFinished(uuid);
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}
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Downloader::Downloader()
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:impl(spimpl::make_unique_impl<p_Downloader>())
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{
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}
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