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Utils.cs
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using System;
using System.IO;
using System.IO.Compression;
using System.Net;
using System.Threading;
using System.Threading.Tasks;
namespace Tensorflow
{
public static class Utils
{
public static async Task DownloadAsync<TDataSet>(this IModelLoader<TDataSet> modelLoader, string url, string saveTo)
where TDataSet : IDataSet
{
var dir = Path.GetDirectoryName(saveTo);
var fileName = Path.GetFileName(saveTo);
await modelLoader.DownloadAsync(url, dir, fileName);
}
public static async Task DownloadAsync<TDataSet>(this IModelLoader<TDataSet> modelLoader, string url, string dirSaveTo, string fileName, bool showProgressInConsole = false)
where TDataSet : IDataSet
{
if (!Path.IsPathRooted(dirSaveTo))
dirSaveTo = Path.Combine(AppContext.BaseDirectory, dirSaveTo);
var fileSaveTo = Path.Combine(dirSaveTo, fileName);
if (showProgressInConsole)
{
Binding.tf_output_redirect.WriteLine($"Downloading {fileName}");
}
if (File.Exists(fileSaveTo))
{
if (showProgressInConsole)
{
Binding.tf_output_redirect.WriteLine($"The file {fileName} already exists");
}
return;
}
Directory.CreateDirectory(dirSaveTo);
using (var wc = new WebClient())
{
await wc.DownloadFileTaskAsync(url, fileSaveTo).ConfigureAwait(false);
}
}
public static async Task UnzipAsync<TDataSet>(this IModelLoader<TDataSet> modelLoader, string zipFile, string saveTo, bool showProgressInConsole = false)
where TDataSet : IDataSet
{
if (!Path.IsPathRooted(saveTo))
saveTo = Path.Combine(AppContext.BaseDirectory, saveTo);
Directory.CreateDirectory(saveTo);
if (!Path.IsPathRooted(zipFile))
zipFile = Path.Combine(AppContext.BaseDirectory, zipFile);
var destFileName = Path.GetFileNameWithoutExtension(zipFile);
var destFilePath = Path.Combine(saveTo, destFileName);
if (showProgressInConsole)
Binding.tf_output_redirect.WriteLine($"Unzippinng {Path.GetFileName(zipFile)}");
if (File.Exists(destFilePath))
{
if (showProgressInConsole)
Binding.tf_output_redirect.WriteLine($"The file {destFileName} already exists");
}
using (GZipStream unzipStream = new GZipStream(File.OpenRead(zipFile), CompressionMode.Decompress))
{
using (var destStream = File.Create(destFilePath))
{
await unzipStream.CopyToAsync(destStream).ConfigureAwait(false);
await destStream.FlushAsync().ConfigureAwait(false);
destStream.Close();
}
unzipStream.Close();
}
}
public static async Task ShowProgressInConsole(this Task task, bool enable)
{
if (!enable)
{
await task;
return;
}
var cts = new CancellationTokenSource();
var showProgressTask = ShowProgressInConsole(cts);
try
{
await task;
}
finally
{
cts.Cancel();
}
await showProgressTask;
Binding.tf_output_redirect.WriteLine("Done.");
}
private static async Task ShowProgressInConsole(CancellationTokenSource cts)
{
var cols = 0;
await Task.Delay(100);
while (!cts.IsCancellationRequested)
{
await Task.Delay(100);
Binding.tf_output_redirect.Write(".");
cols++;
if (cols % 50 == 0)
{
Binding.tf_output_redirect.WriteLine();
}
}
if (cols > 0)
Binding.tf_output_redirect.WriteLine();
}
}
}