private static void GetObjectCallback(IAsyncResult ar)
{
try
{
var result = client.EndGetObject(ar);
using (var stream = result.Content)
{
var buffer = new byte[1024 * 1024];
var bytesRead = 0;
while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) > 0)
{
// 处理读出的数据
}
}
Console.WriteLine(ar.AsyncState as string);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
_event.Set();
}
}
private static void GetObjectCallback(IAsyncResult ar)
{
try
{
var result = client.EndGetObject(ar);
using (var requestStream = result.Content)
{
using (var fs = File.Open(dirToDownload + "/sample2.data", FileMode.OpenOrCreate))
{
int length = 4 * 1024;
var buf = new byte[length];
do
{
length = requestStream.Read(buf, 0, length);
fs.Write(buf, 0, length);
} while (length != 0);
}
}
Console.WriteLine(ar.AsyncState as string);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
_event.Set();
}
}
private static void GetObjectCallback(IAsyncResult ar)
{
try
{
var result = ossClient.EndGetObject(ar);
byte[] buffer = new byte[4096];
var reponseBody = result.Content;
using (reponseBody)
{
while (reponseBody.Read(buffer, 0, 4096) != 0)
{
;
}
}
Console.WriteLine("ETag: " + result.Metadata.ETag);
Console.WriteLine("AsyncState:" + ar.AsyncState as string);
}
catch (Exception ex)
{
OssException ae = ex as OssException;
Console.WriteLine("Failed with error code: {0}; Error info: {1}. \nRequestID:{2}\tHostID:{3}",
ae.ErrorCode, ae.Message, ae.RequestId, ae.HostId);
}
finally
{
_evnet.Set();
}
}
public async Task <Stream> GetFileStreamAsync(string path, CancellationToken cancellationToken = default)
{
if (String.IsNullOrEmpty(path))
{
throw new ArgumentNullException(nameof(path));
}
var response = await Task.Factory.FromAsync(
(request, callback, state) => _client.BeginGetObject(request, callback, state),
result => _client.EndGetObject(result),
new GetObjectRequest(_bucket, NormalizePath(path)),
null
).AnyContext();
return(response.Content);
}
private static void GetObjectCallback(IAsyncResult ar)
{
Hashtable state = (Hashtable)ar.AsyncState;
Action <string> getCallback = (Action <string>)state["callback"];
try
{
OssClient ossClient = (OssClient)state["client"];
string ossfilename = (string)state["ossfilename"];
string localfilename = (string)state["localfilename"];
var result = ossClient.EndGetObject(ar);
var metadata = result.Metadata;
var requestStream = result.Content;
var fs = new FileStream(localfilename, FileMode.OpenOrCreate);
int bufLength = 4 * 1024;
var buf = new byte[bufLength];
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
md5.Initialize();
int offset = 0;
int contentLength = (int)metadata.ContentLength;
while (offset < contentLength)
{
int readSize = bufLength;
if (offset + readSize > contentLength)
{
readSize = contentLength - offset;
}
readSize = requestStream.Read(buf, 0, readSize);
fs.Write(buf, 0, readSize);
if (offset + readSize < contentLength) // 不是最后一块
{
md5.TransformBlock(buf, 0, Convert.ToInt32(readSize), buf, 0);
}
else // 最后一块
{
md5.TransformFinalBlock(buf, 0, Convert.ToInt32(readSize));
}
offset += readSize;
}
fs.Close();
byte[] md5Hash = md5.Hash;
md5.Clear();
string ext = System.IO.Path.GetExtension(ossfilename);
string buffermd5 = Utils.File.FormatMD5(md5Hash) + ext;
if (buffermd5 == ossfilename)
{
_dispatcher.Enqueue(() => {
if (getCallback != null)
{
getCallback(localfilename);
}
});
}
else
{
System.IO.File.Delete(localfilename);
_dispatcher.Enqueue(() => {
if (getCallback != null)
{
getCallback("CheckMD5Failed");
}
});
}
Console.WriteLine(ar.AsyncState as string);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
_dispatcher.Enqueue(() => {
if (getCallback != null)
{
if (ex is ServiceException)
{
string errorCode = ((ServiceException)ex).ErrorCode;
getCallback(errorCode);
if (errorCode == "InvalidAccessKeyId")
{
FetchSTSToken();
}
}
else
{
getCallback(ex.Message);
}
}
});
}
finally
{
// _event.Set();
}
}