Added compress and download util classes

Author: CESARDELATORRE

samples/csharp/common/Compress.cs

@@ -0,0 +1,86 @@
+using ICSharpCode.SharpZipLib.Core;
+using ICSharpCode.SharpZipLib.GZip;
+using ICSharpCode.SharpZipLib.Tar;
+using System;
+using System.IO;
+using System.IO.Compression;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Common
+{
+    public class Compress
+    {
+        public static void ExtractGZip(string gzipFileName, string targetDir)
+        {
+            // Use a 4K buffer. Any larger is a waste.    
+            byte[] dataBuffer = new byte[4096];
+
+            using (System.IO.Stream fs = new FileStream(gzipFileName, FileMode.Open, FileAccess.Read))
+            {
+                using (GZipInputStream gzipStream = new GZipInputStream(fs))
+                {
+                    // Change this to your needs
+                    string fnOut = Path.Combine(targetDir, Path.GetFileNameWithoutExtension(gzipFileName));
+
+                    using (FileStream fsOut = File.Create(fnOut))
+                    {
+                        StreamUtils.Copy(gzipStream, fsOut, dataBuffer);
+                    }
+                }
+            }
+        }
+
+        public static void UnZip(String gzArchiveName, String destFolder)
+        {
+            var flag = gzArchiveName.Split(Path.DirectorySeparatorChar).Last().Split('.').First() + ".bin";
+            if (File.Exists(Path.Combine(destFolder, flag))) return;
+
+            Console.WriteLine($"Extracting.");
+            var task = Task.Run(() =>
+            {
+                ZipFile.ExtractToDirectory(gzArchiveName, destFolder);
+            });
+
+            while (!task.IsCompleted)
+            {
+                Thread.Sleep(200);
+                Console.Write(".");
+            }
+
+            File.Create(Path.Combine(destFolder, flag));
+            Console.WriteLine("");
+            Console.WriteLine("Extracting is completed.");
+        }
+
+        public static void ExtractTGZ(String gzArchiveName, String destFolder)
+        {
+            var flag = gzArchiveName.Split(Path.DirectorySeparatorChar).Last().Split('.').First() + ".bin";
+            if (File.Exists(Path.Combine(destFolder, flag))) return;
+
+            Console.WriteLine($"Extracting.");
+            var task = Task.Run(() =>
+            {
+                using (var inStream = File.OpenRead(gzArchiveName))
+                {
+                    using (var gzipStream = new GZipInputStream(inStream))
+                    {
+                        using (TarArchive tarArchive = TarArchive.CreateInputTarArchive(gzipStream))
+                            tarArchive.ExtractContents(destFolder);
+                    }
+                }
+            });
+
+            while (!task.IsCompleted)
+            {
+                Thread.Sleep(200);
+                Console.Write(".");
+            }
+
+            File.Create(Path.Combine(destFolder, flag));
+            Console.WriteLine("");
+            Console.WriteLine("Extracting is completed.");
+        }
+    }
+}

samples/csharp/common/Web.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Common
+{
+    public class Web
+    {
+        public static bool Download(string url, string destDir, string destFileName)
+        {
+            if (destFileName == null)
+                destFileName = url.Split(Path.DirectorySeparatorChar).Last();
+
+            Directory.CreateDirectory(destDir);
+
+            string relativeFilePath = Path.Combine(destDir, destFileName);
+
+            if (File.Exists(relativeFilePath))
+            {
+                Console.WriteLine($"{relativeFilePath} already exists.");
+                return false;
+            }
+
+            var wc = new WebClient();
+            Console.WriteLine($"Downloading {relativeFilePath}");
+            var download = Task.Run(() => wc.DownloadFile(url, relativeFilePath));
+            while (!download.IsCompleted)
+            {
+                Thread.Sleep(1000);
+                Console.Write(".");
+            }
+            Console.WriteLine("");
+            Console.WriteLine($"Downloaded {relativeFilePath}");
+
+            return true;
+        }
+    }
+}