public async Task DownloadFile(string remotePath, string localPath = null, FileHandler handler = null)
{
try
{
var pathKey = localPath ?? remotePath;
using (var s3Client = AWSS3Client)
{
if (handler != null)
{
_fileHandlers[pathKey] = handler;
}
var request = new GetObjectRequest
{
BucketName = ZibaobaoBucket,
Key = ConvertToRemotePath(remotePath)
};
try
{
using (var response = await s3Client.GetObjectAsync(request))
{
response.WriteObjectProgressEvent += Request_WriteObjectProgressEvent;
string content = null;
using (var stream = response.ResponseStream)
{
if (!string.IsNullOrEmpty(localPath))
{
ZibaobaoLibContext.Instance.PersistentStorage.SaveContent(localPath, stream);
}
else
{
using (var reader = new StreamReader(stream))
{
content = reader.ReadToEnd();
}
}
}
if (_fileHandlers.ContainsKey(pathKey))
{
_fileHandlers[pathKey].OnFileAvailable(pathKey, content);
_fileHandlers.Remove(pathKey);
}
else
{
OnFileAvailable?.Invoke(this, new StringEventArgs(pathKey));
}
}
}
catch (AmazonS3Exception s3Exception)
{
X1LogHelper.Exception(s3Exception);
}
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("=====ERROR ========");
}
}
void File_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
System.Diagnostics.Debug.WriteLine("[Property changed] " + e.PropertyName + " -> " + sender?.GetType().GetProperty(e.PropertyName)?.GetValue(sender, null));
// Update UI text-fields
var downloadFile = ((IDownloadFile)sender);
if (downloadFile == null)
{
return;
}
// Update UI text-fields
switch (e.PropertyName)
{
case nameof(IDownloadFile.Status):
X1LogHelper.Log($"{downloadFile.Url} [status]: {downloadFile.Status}");
break;
case nameof(IDownloadFile.TotalBytesExpected):
X1LogHelper.Verbose($"{downloadFile.Url} [Total length]: {downloadFile.TotalBytesExpected}");
break;
case nameof(IDownloadFile.TotalBytesWritten):
X1LogHelper.Verbose($"{downloadFile.Url} [downloaded]: {downloadFile.TotalBytesWritten}");
break;
}
// Update UI if download-status changed.
if (e.PropertyName == "Status")
{
switch (((IDownloadFile)sender).Status)
{
case DownloadFileStatus.COMPLETED:
{
X1LogHelper.Log($"{downloadFile.Url} [downloaded as ]: [{downloadFile.DestinationPathName}]");
var path = downloadFile.DestinationPathName;
if (path.StartsWith(BaobaoModel.LocalPathPrefix))
{
path = path.Substring(BaobaoModel.LocalPathPrefix.Length);
}
OnFileAvailable?.Invoke(this, new StringEventArgs(path));
}
break;
}
}
}
