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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
*
* Copyright (C) 2013 by Dominik Riebeling
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <QtNetwork>
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include "httpget.h"
#include "Logger.h"
QString HttpGet::m_globalUserAgent; //< globally set user agent for requests
QDir HttpGet::m_globalCache; //< global cach path value for new objects
QNetworkProxy HttpGet::m_globalProxy;
HttpGet::HttpGet(QObject *parent)
: QObject(parent),
m_mgr(this),
m_reply(nullptr),
m_cache(nullptr),
m_cachedir(m_globalCache),
m_outputFile(nullptr),
m_proxy(QNetworkProxy::NoProxy)
{
setCache(true);
connect(&m_mgr, &QNetworkAccessManager::finished, this,
static_cast<void (HttpGet::*)(QNetworkReply*)>(&HttpGet::requestFinished));
m_lastServerTimestamp = QDateTime();
}
/** @brief set cache path
* @param d new directory to use as cache path
*/
void HttpGet::setCache(const QDir& d)
{
if(m_cache && m_cachedir == d.absolutePath())
return;
m_cachedir.setPath(d.absolutePath());
setCache(true);
}
/** @brief enable / disable cache useage
* @param c set cache usage
*/
void HttpGet::setCache(bool c)
{
// don't change cache if it's already (un)set.
if(c && m_cache) return;
if(!c && !m_cache) return;
// don't delete the old cache directly, it might still be in use. Just
// instruct it to delete itself later.
if(m_cache) m_cache->deleteLater();
m_cache = nullptr;
QString path = m_cachedir.absolutePath();
if(!c || m_cachedir.absolutePath().isEmpty()) {
LOG_INFO() << "disabling download cache";
}
else {
// append the cache path to make it unique in case the path points to
// the system temporary path. In that case using it directly might
// cause problems. Extra path also used in configure dialog.
path += "/rbutil-cache";
LOG_INFO() << "setting cache folder to" << path;
m_cache = new QNetworkDiskCache(this);
m_cache->setCacheDirectory(path);
}
m_mgr.setCache(m_cache);
}
/** @brief read all downloaded data into a buffer
* @return data
*/
QByteArray HttpGet::readAll()
{
return m_data;
}
/** @brief Set and enable Proxy to use.
* @param proxy Proxy URL.
*/
void HttpGet::setProxy(const QUrl &proxy)
{
LOG_INFO() << "Proxy set to" << proxy;
m_proxy.setType(QNetworkProxy::HttpProxy);
m_proxy.setHostName(proxy.host());
m_proxy.setPort(proxy.port());
m_proxy.setUser(proxy.userName());
m_proxy.setPassword(proxy.password());
m_mgr.setProxy(m_proxy);
}
/** @brief Enable or disable use of previously set proxy.
* @param enable Enable proxy.
*/
void HttpGet::setProxy(bool enable)
{
if(enable) m_mgr.setProxy(m_proxy);
else m_mgr.setProxy(QNetworkProxy::NoProxy);
}
/** @brief Set output file.
*
* Set filename for storing the downloaded file to. If no file is set the
* downloaded file will not be stored to disk but kept in memory. The result
* can then be retrieved using readAll().
*
* @param file Output file.
*/
void HttpGet::setFile(QFile *file)
{
m_outputFile = file;
}
void HttpGet::abort()
{
if(m_reply) m_reply->abort();
}
void HttpGet::requestFinished(QNetworkReply* reply)
{
m_lastStatusCode
= reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
LOG_INFO() << "Request finished, status code:" << m_lastStatusCode;
m_lastServerTimestamp
= reply->header(QNetworkRequest::LastModifiedHeader).toDateTime().toLocalTime();
LOG_INFO() << "Data from cache:"
<< reply->attribute(QNetworkRequest::SourceIsFromCacheAttribute).toBool();
m_lastRequestCached =
reply->attribute(QNetworkRequest::SourceIsFromCacheAttribute).toBool();
if(reply->attribute(QNetworkRequest::RedirectionTargetAttribute).isValid()) {
// handle relative URLs using QUrl::resolved()
QUrl org = reply->request().url();
QUrl url = QUrl(org).resolved(
reply->attribute(QNetworkRequest::RedirectionTargetAttribute).toUrl());
// reconstruct query
#if QT_VERSION < 0x050000
QList<QPair<QByteArray, QByteArray> > qitms = org.encodedQueryItems();
for(int i = 0; i < qitms.size(); ++i)
url.addEncodedQueryItem(qitms.at(i).first, qitms.at(i).second);
#else
url.setQuery(org.query());
#endif
LOG_INFO() << "Redirected to" << url;
startRequest(url);
return;
}
else if(m_lastStatusCode == 200 ||
(reply->url().scheme() == "file" && reply->error() == 0)) {
// callers might not be aware if the request is file:// so fake 200.
m_lastStatusCode = 200;
m_data = reply->readAll();
if(m_outputFile && m_outputFile->open(QIODevice::WriteOnly)) {
m_outputFile->write(m_data);
m_outputFile->close();
}
emit done(false);
}
else {
m_data.clear();
emit done(true);
}
reply->deleteLater();
m_reply = nullptr;
}
void HttpGet::downloadProgress(qint64 received, qint64 total)
{
emit dataReadProgress((int)received, (int)total);
}
void HttpGet::startRequest(QUrl url)
{
LOG_INFO() << "Request started";
QNetworkRequest req(url);
if(!m_globalUserAgent.isEmpty())
req.setRawHeader("User-Agent", m_globalUserAgent.toLatin1());
m_reply = m_mgr.get(req);
#if QT_VERSION < 0x050f00
connect(m_reply,
static_cast<void (QNetworkReply::*)(QNetworkReply::NetworkError)>(&QNetworkReply::error),
this, &HttpGet::networkError);
#else
connect(m_reply, &QNetworkReply::errorOccurred, this, &HttpGet::networkError);
#endif
connect(m_reply, &QNetworkReply::downloadProgress, this, &HttpGet::downloadProgress);
}
void HttpGet::networkError(QNetworkReply::NetworkError error)
{
LOG_ERROR() << "NetworkError occured:" << error << m_reply->errorString();
m_lastErrorString = m_reply->errorString();
}
/** @brief Retrieve the file pointed to by url.
*
* Note: This also handles file:// URLs. Be aware that QUrl requires file://
* URLs to be absolute, i.e. file://filename.txt doesn't work. Use
* QDir::absoluteFilePath() to convert to an absolute path first.
*
* @param url URL to download.
*/
void HttpGet::getFile(const QUrl &url)
{
LOG_INFO() << "Get URI" << url.toString();
m_data.clear();
startRequest(url);
}
/** @brief Retrieve string representation for most recent error.
* @return Error string.
*/
QString HttpGet::errorString(void)
{
return m_lastErrorString;
}
/** @brief Return last HTTP response code.
* @return Response code.
*/
int HttpGet::httpResponse(void)
{
return m_lastStatusCode;
}
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