downloadfile.cpp
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#include "downloadfile.h"
#include <QDebug>
#include <QDir>
#include "GlobalSetting.h"
#include <QMutexLocker>
QMutex downloadMutex;
IDownloadFile *IDownloadFile::m_downloadFile = NULL;
IDownloadFile::IDownloadFile()
{
httpRequestAborted = false;
reply = NULL;
file = NULL;
downloadNum = 0;
downloadFlag = false;
connect(this, SIGNAL(startDownloadFile()), this, SLOT(startDownload()));
}
IDownloadFile *IDownloadFile::Instance()
{
if (!m_downloadFile)
m_downloadFile = new IDownloadFile();
return m_downloadFile;
}
void IDownloadFile::addDownloadFile(QUrl url,QString filename,int fid)
{
downloadNum++;
if(downloadNum >= 20)
{
downloadNum = 19;
return;
}
downFileMsg[downloadNum].url = url;
downFileMsg[downloadNum].filename = filename;
downFileMsg[downloadNum].fid = fid;
}
void IDownloadFile::startDownload()
{
if(downloadNum > 0)
{
downloadFile(downFileMsg[downloadNum].url,downFileMsg[downloadNum].filename,downFileMsg[downloadNum].fid);
downloadNum--;
}
else
{
emit downloadFileEnd();
}
}
/**********************************************
* 作者姓名：袁爱玲
* 函数介绍：
* 定义的参数含义说明
* 输入参数：
* 输出参数：void
* 返回值 ：void
**********************************************/
void IDownloadFile::downloadFile(QUrl url,QString filename,int fid)
{
QMutexLocker locker(&downloadMutex);
if(downfileMap.contains(fid))
{
return;
}
downfileMap.insert(fid, filename);
httpRequestAborted = false;
reply = NULL;
file = NULL;
this->url = url;
this->fid = fid;
this->filename = filename;
QDir my_dir;
QFileInfo my_info(filename);
if(!my_dir.exists(my_info.absoluteDir().path()))
{
my_dir.mkpath(my_info.absoluteDir().path());
}
file = new QFile(filename);
if(!file->open(QIODevice::WriteOnly))
{
qDebug()<<"Unable to save the file"<< filename << file->errorString();
delete file;
file = 0;
return;
}
reply = qnam.get(QNetworkRequest(url));
connect(reply, SIGNAL(finished()),
this, SLOT(httpFinished()));
connect(reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(errorReturn(QNetworkReply::NetworkError)));
connect(reply, SIGNAL(readyRead()),
this, SLOT(httpReadyRead()));
}
void IDownloadFile::errorReturn(QNetworkReply::NetworkError error)
{
qDebug()<<"errorReturn"<<error;
emit writeok(0);
}
/**********************************************
* 作者姓名：袁爱玲
* 函数介绍：
* 定义的参数含义说明
* 输入参数：
* 输出参数：void
* 返回值 ：void
**********************************************/
void IDownloadFile::cancelDownload()
{
httpRequestAborted = true;
if(reply != NULL)
{
reply->canReadLine();
reply->abort();
reply->deleteLater();
}
if(file != NULL)
{
delete file;
file = NULL;
}
}
/**********************************************
* 作者姓名：袁爱玲
* 函数介绍：
* 定义的参数含义说明
* 输入参数：
* 输出参数：void
* 返回值 ：void
**********************************************/
void IDownloadFile::httpFinished()
{
//D
if (httpRequestAborted) {
if (file) {
file->close();
file->remove();
delete file;
file = 0;
}
if(reply != NULL)
{
reply->deleteLater();
reply = NULL;
}
return;
}
file->flush();
file->close();
QVariant redirectionTarget = reply->attribute(QNetworkRequest::RedirectionTargetAttribute);
if (reply->error())
{
file->remove();
emit downloadError(fid);
qDebug()<<"PC客户端下载部分："<<reply->errorString() << file->fileName();
}
else if (!redirectionTarget.isNull())
{
url= url.resolved(redirectionTarget.toUrl());
if(reply != NULL)
{
reply->deleteLater();
reply = NULL;
}
// file->open(QIODevice::WriteOnly);
// file->resize(0);
//startRequest(url);
return;
}
else
{
downfileMap.remove(fid);
emit writeok(fid);
}
if(reply != NULL)
{
reply->deleteLater();
reply = NULL;
}
delete file;
file = NULL;
// this->deleteLater();
startDownloadFile();
}
/**********************************************
* 作者姓名：袁爱玲
* 函数介绍：
* 定义的参数含义说明
* 输入参数：
* 输出参数：void
* 返回值 ：void
**********************************************/
void IDownloadFile::httpReadyRead()
{
if (file)
file->write(reply->readAll());
}