/// <summary>
/// 创建<see cref="Downloader"/>
/// </summary>
/// <param name="url">下载地址</param>
/// <param name="mirrors">镜像地址</param>
/// <param name="savePath">保存路径</param>
/// <param name="threadCount">下载线程数</param>
/// <param name="cacheLength">缓存大小，缓存可减少硬盘写入压力，不使用缓存可设置为<see cref="Downloader.EmptyCacheLength"/></param>
public Downloader(string url, IEnumerable <string> mirrors, string savePath, int threadCount, int cacheLength)
{
if (string.IsNullOrEmpty(url))
{
throw new ArgumentException("url can not be null or empty.");
}
if (string.IsNullOrEmpty(savePath))
{
throw new ArgumentException("savePath can not be null or empty.");
}
if (threadCount <= 0)
{
throw new ArgumentException("threadCount must bigger than 0.");
}
this._workID = EmptyWorkID;
this._segmentCalculator = new MinSizeSegmentCalculator(SegmentMinSize);
// 初始化_localFileCache
var mainSource = new FileSource(url);
List <FileSource> mirrorSources = null;
if (mirrors != null)
{
mirrorSources = new List <FileSource>();
foreach (var mirror in mirrors)
{
mirrorSources.Add(new FileSource(mirror));
}
}// if
this._config = new LocalFileConfig
{
MainSource = mainSource,
Mirrors = mirrorSources,
};
this._maxThreadCount = threadCount;
this._savePath = savePath;
this._configPath = DownloadHelper.GetConfigPathFromFilePath(savePath);
this._tmpPath = DownloadHelper.GetTmpPathFromFilePath(savePath);
this._cacheLength = cacheLength;
this._status = DownloaderStatuses.Idle;
}
/// <summary>
/// 创建<see cref="Downloader"/>
/// </summary>
/// <param name="configPath">本地文件</param>
/// <param name="threadCount">下载线程数</param>
/// <param name="cacheLength">缓存大小，缓存可减少硬盘写入压力，不使用缓存可设置为<see cref="Downloader.EmptyCacheLength"/></param>
public Downloader(string configPath, int threadCount, int cacheLength)
{
if (string.IsNullOrEmpty(configPath))
{
throw new ArgumentException("configPath can not be null or empty.");
}
var localFileConfig = LocalFileConfig.Load(configPath);
if (localFileConfig.MainSource == null)
{
throw new Exception("LocalFileConfig.MainSource can not be null.");
}
if (localFileConfig.RemoteInfo == null)
{
throw new Exception("LocalFileConfig.RemoteInfo can not be null.");
}
if (localFileConfig.RemoteInfo.Size < 0)
{
throw new Exception("LocalFileConfig.RemoteInfo.Size must bigger than 0.");
}
if (!localFileConfig.HasSegment)
{
throw new Exception("LocalFileConfig.Segments can not be empty.");
}
this._workID = EmptyWorkID;
this._segmentCalculator = new MinSizeSegmentCalculator(SegmentMinSize);
this._config = localFileConfig;
this._maxThreadCount = threadCount;
this._configPath = configPath;
this._savePath = DownloadHelper.GetFilePathFromConfigPath(configPath);
this._tmpPath = DownloadHelper.GetTmpPathFromFilePath(this._savePath);
this._cacheLength = cacheLength;
this._status = DownloaderStatuses.Idle;
}
