protected static async Task BigFileAppendUploadDownLoad()
{
var temp = Enumerable.Repeat((byte)99, 1024 * 1024 * 100);
var testBytes = temp.ToArray();
StorageNode storageNode = await FastDFSClient.GetStorageNodeAsync("group1", "default");
var filename = await FastDFSClient.UploadAppenderFileAsync(storageNode, testBytes.Take(1024 * 1024 * 2).ToArray(), "txt", "default");
for (int i = 0; i < 49; i++)
{
FDFSFileInfo fileInfo = await FastDFSClient.GetFileInfoAsync(storageNode, filename, "default");
var appendBytes = testBytes.Skip((int)fileInfo.FileSize).Take(1024 * 1024 * 2).ToArray();
await FastDFSClient.AppendFileAsync("group1", filename, appendBytes, "default");
}
using (var fileStream = File.OpenWrite("c:\\fastdfs_test.txt"))
{
for (int i = 0; i < 50; i++)
{
var buffer = await FastDFSClient.DownloadFileAsync(storageNode, filename, "default",
1024 * 1024 * 2 *i,
1024 * 1024 * 2);
fileStream.Write(buffer, 0, buffer.Length);
}
}
await FastDFSClient.RemoveFileAsync("group1", filename, "default");
temp = null;
testBytes = null;
}
/// <summary>
/// 获取对象二进制数组
/// </summary>
/// <param name="groupName">组名称</param>
/// <param name="objectName">对象名称</param>
/// <returns>对象的二进制数组</returns>
public async Task <byte[]> GetObjectByteAsync(string objectName, string groupName = "")
{
RestoreFileName(objectName, out string fileName, out groupName);
var storageNode = await GetStorageNodeAsync(groupName);
return(await FastDFSClient.DownloadFileAsync(storageNode, fileName));
}
public async Task <IActionResult> GetFileAsync([FromRoute] string filename)
{
filename = HttpUtility.UrlDecode(filename);
//StorageNode storageNode = await FastDFSClient.GetStorageNodeAsync(NodeGroup);
StorageNode storageNode = await FastDFSClient.GetStorageNodeAsync();
byte[] fileContent = await FastDFSClient.DownloadFileAsync(storageNode, filename);
return(File(fileContent, "application/octet-stream"));
}
protected static async Task BigFileUploadDownLoad()
{
var temp = Enumerable.Repeat((byte)99, 1024 * 1024 * 100);
var testBytes = temp.ToArray();
StorageNode storageNode = await FastDFSClient.GetStorageNodeAsync("group1", "default");
var filename = await FastDFSClient.UploadFileAsync(storageNode, testBytes, "txt", "default");
using (var fileStream = File.OpenWrite("c:\\fastdfs_test.txt"))
{
await FastDFSClient.DownloadFileAsync(storageNode, filename, new StreamDownloadCallback(fileStream), "default");
}
await FastDFSClient.RemoveFileAsync("group1", filename, "default");
temp = null;
testBytes = null;
}
private static async Task DownLoadFile()
{
var testBytes = Encoding.UTF8.GetBytes("12345678911118888888888888888881111111111");
StorageNode storageNode = await FastDFSClient.GetStorageNodeAsync("group1", "default");
var filename = await FastDFSClient.UploadFileAsync(storageNode, testBytes, "txt", "default");
var bytes = await FastDFSClient.DownloadFileAsync(storageNode, filename, "default");
if (bytes == null)
{
Console.WriteLine($"DownLoadFile Fail : Bytes null ");
}
if (Encoding.UTF8.GetString(bytes) == Encoding.UTF8.GetString(testBytes))
{
Console.WriteLine($"DownLoadFile Success");
}
else
{
throw new ApplicationException("DownLoadFile Fail : Bytes Diff");
}
}
/// <summary>
/// 获取对象流
/// </summary>
/// <param name="groupName">组名称</param>
/// <param name="objectName">对象名称</param>
/// <returns>对象流</returns>
public async Task <Stream> GetObjectStreamAsync(string objectName, string groupName = "")
{
RestoreFileName(objectName, out string fileName, out groupName);
var storageNode = await GetStorageNodeAsync(groupName);
FDFSFileInfo fileInfo = await FastDFSClient.GetFileInfoAsync(storageNode, fileName);
Stream stream = new MemoryStream();
int limit = 1024 * 100;//每次获取100KB的数据
//如果文件大小大于100KB 分次写入
if (fileInfo.FileSize >= limit)
{
long offset = 0;
long len = limit;
while (len > 0)
{
byte[] buffer = await FastDFSClient.DownloadFileAsync(storageNode, fileName, offset, len);
stream.Write(buffer, 0, int.Parse(len.ToString()));
stream.Flush();
offset += len;
len = (fileInfo.FileSize - offset) >= limit ? limit : (fileInfo.FileSize - offset);
}
}
else
{
//如果文件大小小小于100KB 直接写入文件
byte[] buffer = await FastDFSClient.DownloadFileAsync(storageNode, fileName);
stream.Write(buffer, 0, buffer.Length);
stream.Flush();
}
stream.Seek(0, SeekOrigin.Begin);
return(stream);
}