/// <summary>
/// 从服务器获取文件的hash值
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
#region private String getFileHashFromServer(String fileName)
private String getFileHashFromServer(String fileName)
{
String hash = String.Empty;
if (String.IsNullOrEmpty(fileName))
{
Logger.error(typeof(UpdateController), "file name is empty when try to get hash from server.");
return(hash);
}
hash = update.getHashFromServer(fileName);
return(hash);
}
/// <summary>
/// 开始更新任务
/// </summary>
#region public void startUpdate()
public void startUpdate()
{
//检查版本是否更新
for (int i = 0; i < 10; i++)//如果不成功，重复查询十次
{
//重复十次查询，没有结果，结束本次更新
if (i >= 10)
{
Logger.warn(typeof(UpdateController), "check app version for 10 times, can not get anything.");
return;
}
//记录返回的查询结果
String path, name;
bool isUpdate = update.checkVersion(out path, out name);
//查询结果判断
if (!isUpdate)
{
Logger.warn(typeof(UpdateController), "the app has not been update in server.");
return;
}
if (String.IsNullOrEmpty(path) || String.IsNullOrEmpty(name))
{
Logger.warn(typeof(UpdateController), "update client has find updated version in server, but some error occured unknown.");
continue;
}
serverName = name;
serverPath = path;
break;
}
//进行十次下载文件操作，十次以后文件下载如果不成功，则结束本次更新
for (var i = 0; i < 10; i++)
{
//查询次数大于十次，结束更新
if (i > 9)
{
Logger.warn(typeof(UpdateController), "download file over 10 times, but still failed,please check if network is avaliable."); return;
}
//获取本地文件大小
long size = update.checkFileExist(serverName);
//开始下载
bool isDownload = update.downloadFile(serverPath, serverName, size);
//判断是否下载成功
if (!isDownload)
{
Logger.warn(typeof(UpdateController), "down load file error. try again.");
continue;//下载不成功继续下载
}
//下载成功校验sha256值是否正确
String localHash = CommonUtils.getFileSHA256(serverName);
String serverHash = update.getHashFromServer(serverName);
if (String.IsNullOrEmpty(localHash) || String.IsNullOrEmpty(serverHash) || !localHash.Equals(serverHash))
{
Logger.warn(typeof(UpdateController), "download file has been destroyed.delete it and try download again");
CommonUtils.deleteFile(serverName);
continue;
}
Logger.info(typeof(UpdateController), "download file success.");
break;
}
//备份本地数据，十次备份不成功，退出更新
for (var i = 0; i < 10; i++)
{
if (i > 9)//备份次数大于10,结束备份
{
Logger.warn(typeof(UpdateController), "back up local app info error.");
return;
}
String appPath;//记录主程序的运行路径
//开始备份数据
bool isBack = update.backLocalAppInfo(out appPath);
if (!isBack)//备份失败
{
Logger.warn(typeof(UpdateController), "back up local app info error.try again");
continue;
}
//备份成功
Logger.info(typeof(UpdateController), "back up local app info success.");
installPath = appPath;
break;
}
//安装更新包
update.installApp(installPath, serverName);
}