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Added download retries in case of connection timeout

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This commit is contained in:
Martin Tůma 2018-04-28 19:07:52 +02:00
parent 9c125a0583
commit 247eef5261
2 changed files with 24 additions and 12 deletions
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30
src/map/downloader.cpp
View File

@ -1,7 +1,6 @@
#include <QFile>
#include <QFileInfo>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QBasicTimer>
#include "config.h"
#include "downloader.h"
@ -26,6 +25,7 @@
#define ATTR_LEVEL (QNetworkRequest::Attribute)(QNetworkRequest::User + 2)
#define MAX_REDIRECT_LEVEL 5
#define RETRIES 3
Authorization::Authorization(const QString &username, const QString &password)
@ -89,10 +89,12 @@ bool Downloader::doDownload(const Download &dl,
if (!url.isValid() || !(url.scheme() == "http" || url.scheme() == "https")) {
qWarning("%s: Invalid URL\n", qPrintable(url.toString()));
if (redirect)
_errorDownloads.insert(redirect->origin(), RETRIES);
return false;
}
if (_errorDownloads.contains(url))
if (_errorDownloads.value(url) >= RETRIES)
return false;
if (_currentDownloads.contains(url) && !redirect)
return false;
@ -141,18 +143,27 @@ bool Downloader::saveToDisk(const QString &filename, QIODevice *data)
return true;
}
void Downloader::insertError(const QUrl &url, QNetworkReply::NetworkError error)
{
if (error == QNetworkReply::OperationCanceledError)
_errorDownloads.insert(url, _errorDownloads.value(url) + 1);
else
_errorDownloads.insert(url, RETRIES);
}
void Downloader::downloadFinished(QNetworkReply *reply)
{
QUrl url = reply->request().url();
QNetworkReply::NetworkError error = reply->error();
if (reply->error()) {
if (error) {
QUrl origin = reply->request().attribute(ATTR_ORIGIN).toUrl();
if (origin.isEmpty()) {
_errorDownloads.insert(url);
insertError(url, error);
qWarning("Error downloading file: %s: %s\n",
url.toEncoded().constData(), qPrintable(reply->errorString()));
} else {
_errorDownloads.insert(origin);
insertError(origin, error);
qWarning("Error downloading file: %s -> %s: %s\n",
origin.toEncoded().constData(), url.toEncoded().constData(),
qPrintable(reply->errorString()));
@ -167,7 +178,7 @@ void Downloader::downloadFinished(QNetworkReply *reply)
int level = reply->request().attribute(ATTR_LEVEL).toInt();
if (level >= MAX_REDIRECT_LEVEL) {
_errorDownloads.insert(origin);
_errorDownloads.insert(origin, RETRIES);
qWarning("Error downloading file: %s: "
"redirect level limit reached (redirect loop?)\n",
origin.toEncoded().constData());
@ -182,13 +193,12 @@ void Downloader::downloadFinished(QNetworkReply *reply)
Redirect redirect(origin.isEmpty() ? url : origin, level + 1);
Download dl(redirectUrl, filename);
if (!doDownload(dl, reply->request().rawHeader("Authorization"),
&redirect))
_errorDownloads.insert(origin.isEmpty() ? url : origin);
doDownload(dl, reply->request().rawHeader("Authorization"),
&redirect);
}
} else {
if (!saveToDisk(filename, reply))
_errorDownloads.insert(url);
_errorDownloads.insert(url, RETRIES);
}
}

6
src/map/downloader.h
View File

@ -2,11 +2,12 @@
#define DOWNLOADER_H
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QUrl>
#include <QList>
#include <QSet>
#include <QHash>
class QNetworkReply;
class Download
{
@ -59,12 +60,13 @@ private:
class Redirect;
class ReplyTimeout;
void insertError(const QUrl &url, QNetworkReply::NetworkError error);
bool doDownload(const Download &dl, const QByteArray &authorization,
const Redirect *redirect = 0);
bool saveToDisk(const QString &filename, QIODevice *data);
QSet<QUrl> _currentDownloads;
QSet<QUrl> _errorDownloads;
QHash<QUrl, int> _errorDownloads;
static int _timeout;
static QNetworkAccessManager *_manager;