/// <summary>
/// 增量下载文件
/// </summary>
/// <param name="storageNode">GetStorageNode方法返回的存储节点</param>
/// <param name="fileName">文件名</param>
/// <param name="offset">从文件起始点的偏移量</param>
/// <param name="length">要读取的字节数</param>
/// <returns>文件内容</returns>
public static byte[] DownloadFile(StorageNode storageNode, string fileName, long offset, long length)
{
fileName = GetFileName(storageNode.GroupName, fileName);
using (var storageReqeust = DOWNLOAD_FILE.CreateRequest(storageNode.EndPoint, offset, length, storageNode.GroupName, fileName))
{
var storageResponse = new DOWNLOAD_FILE.Response(storageReqeust.GetStorageResponse());
return(storageResponse.Content);
}
}
/// <summary>
/// 异步下载
/// </summary>
/// <param name="storageNode"></param>
/// <param name="fileName"></param>
/// <returns></returns>
public static async Task <byte[]> DownloadFileAsync(StorageNode storageNode, string fileName)
{
fileName = GetFileName(storageNode.GroupName, fileName);
using (var storageReqeust = DOWNLOAD_FILE.CreateRequest(storageNode.EndPoint, 0L, 0L, storageNode.GroupName, fileName))
{
Task <byte[]> task = null; // storageReqeust.ReadBytesAsync();
await task;
return(task.Result);
}
}
/// <summary>
/// 下载文件
/// </summary>
/// <param name="storageNode">GetStorageNode方法返回的存储节点</param>
/// <param name="fileName">文件名</param>
/// <exception cref="System.Exception">读取网络资源异常</exception>
/// <returns>文件内容</returns>
public static byte[] DownloadFile(StorageNode storageNode, string fileName)
{
fileName = GetFileName(storageNode.GroupName, fileName);
using (var storageReqeust = DOWNLOAD_FILE.CreateRequest(storageNode.EndPoint, 0L, 0L, storageNode.GroupName, fileName))
{
// 同步下载
var storageResponse = new DOWNLOAD_FILE.Response(storageReqeust.GetStorageResponse());
if (storageResponse.Content == null)
{
throw new System.Exception(storageReqeust.Message);
}
return(storageResponse.Content);
}
}