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Copy pathSingleFileDownloader.cpp
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128 lines (113 loc) · 3.59 KB
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/**
* Tencent is pleased to support the open source community by making Tars available.
*
* Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.
*
* Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* https://opensource.org/licenses/BSD-3-Clause
*
* Unless required by applicable law or agreed to in writing, software distributed
* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
#include "SingleFileDownloader.h"
#include "servant/TarsLogger.h"
#include "util.h"
DownloadTaskFactory* DownloadTaskFactory::_instance = new DownloadTaskFactory();
int SingleFileDownloader::download(const PatchPrx &patchPrx, const string &remoteFile, const string &localFile, const DownloadEventPtr &pPtr, std::string & sResult)
{
vector<tars::FileInfo> vFiles;
int ret = 0;
for( int i = 0; i < 2; i ++)
{
try
{
ret = patchPrx->listFileInfo(remoteFile, vFiles);
break;
}
catch(TarsException& ex)
{
TLOGERROR("SingleFileDownloader::download " << (remoteFile + " TarsException " + ex.what())<< endl);
}
}
//1表示是文件
if(ret != 1)
{
sResult = remoteFile + " is not an file";
return -1;
}
if(vFiles.size() < 1)
{
sResult = remoteFile + " not exist";
return -2;
}
tars::FileInfo fileInfo = vFiles[0];
FILE *fp = fopen(localFile.c_str(), "wb");
if (!fp)
{
sResult = localFile + " can not write";
return -3;
}
//循环下载文件到本地
vector<char> buffer;
int pos = 0;
int downloadRet = 0;
bool fileEnded = false;
while (true)
{
buffer.clear();
//最多尝试两次
for( int i = 0; i < 2; i ++)
{
try
{
downloadRet = patchPrx->download(remoteFile, pos, buffer);
break;
}
catch(TarsException& ex)
{
TLOGERROR("SingleFileDownloader::download "<< (remoteFile + " TarsException " + ex.what()) << endl);
}
}
if (downloadRet < 0)
{
TLOGERROR("SingleFileDownloader::download " << "|downloadRet:" << downloadRet << "|remoteFile:" << remoteFile << endl);
sResult = remoteFile + " download from tarspatch error " + TC_Common::tostr(downloadRet);
ret = downloadRet - 100;
break;
}
else if (downloadRet == 0)
{
size_t r = fwrite((void*)&buffer[0], 1, buffer.size(), fp);
if (r == 0)
{
TLOGERROR("SingleFileDownloader::download fwrite file '" + localFile + "' error!" << endl);
sResult = "fwrite file '" + localFile + "' error!";
ret = -5;
break;
}
pos += r;
if(pPtr)
{
pPtr->onDownloading(fileInfo, pos);
}
}
else if (downloadRet == 1)
{
TLOGDEBUG("SingleFileDownloader::download load succ " << remoteFile << "|pos:"<<pos<<endl);
ret = 0;
fileEnded = true;
break;
}
}
if(!fileEnded)
{
ret = -6;
sResult = remoteFile + " not end";
}
fclose(fp);
return ret;
}