FTP, Console, Gzip compression sample code
using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics; // Trace
using System.IO; // FTP
using System.Net; // FTP
using System.IO.Compression; // GZip compression
namespace FTP
{
class Program
{
static void Main(string[] args)
{
FtpWebRequest ftpWebRequest = null;
FtpWebResponse ftpWebResponse = null;
Stream responseStream = null;
try
{
ftpWebRequest = (FtpWebRequest)WebRequest.Create(@"ftp://ftp.microsoft.com/developr/readme.txt");
ftpWebRequest.Method = WebRequestMethods.Ftp.DownloadFile;
// Assumes the FTP site uses anonymous logon.
ftpWebRequest.Credentials = new NetworkCredential("anonymous", "janeDoe@contoso.com");
ftpWebResponse = (FtpWebResponse)ftpWebRequest.GetResponse();
responseStream = ftpWebResponse.GetResponseStream();
System.Diagnostics.Trace.WriteLine("File Download Complete, status: " + ftpWebResponse.StatusDescription);
WriteStreamToFile(responseStream, @"c:\ISV\ftpFile");
} // try
catch (Exception Ex)
{
Console.WriteLine(Ex.ToString()); // Log error somewhere
throw Ex; // rethrow the exception up the stack
} // catch
finally
{
// make sure to close system resources - file handles in this case
if (ftpWebResponse != null)
ftpWebResponse.Close();
if (responseStream != null)
responseStream.Close();
} // finally
} // Main()
public static void WriteStreamToFile(Stream stream, string fileName)
{
FileStream fileStream = null;
FileStream fileStreamCompressed = null;
MemoryStream memoryStream = null;
GZipStream compressedzipStream = null; // Use the memory stream for the compressed data.
int ibytes = 0;
Byte[] read = new Byte[4096]; //tcp packet size
Byte[] buffer = null;
string filenameCompressed = fileName + @".Gzip";
string filenameUnCompressed = fileName + @".txt";
String stringFormat = "";
try
{
if (stream.CanRead)
{
fileStream = new FileStream(filenameUnCompressed, FileMode.Create, FileAccess.Write);
ibytes = stream.Read(read, 0, 4096);
while (ibytes > 0)
{
fileStream.Write(read, 0, ibytes);
ibytes = stream.Read(read, 0, 4096);
}
fileStream.Flush();
fileStream.Close();
fileStream = null; // we will reopen for read so let's note it is closed.
Trace.WriteLine(filenameUnCompressed + " Written");
// Open uncompressed file read only
fileStream = new FileStream(filenameUnCompressed, FileMode.Open, FileAccess.Read, FileShare.Read);
buffer = new byte[fileStream.Length];
// The test file is small, so let's just read the entire thing
int count = fileStream.Read(buffer, 0, buffer.Length);
// Create a memory Stream to hold compressed bytes
memoryStream = new MemoryStream();
// Use the newly created memory stream for the compressed data.
compressedzipStream = new GZipStream(memoryStream, CompressionMode.Compress, true);
compressedzipStream.Write(buffer, 0, buffer.Length);
// Close the stream.
stringFormat = String.Format("Original file: {0}, size: {1} bytes\nCompressed file: {2}, size: {3} bytes"
, filenameUnCompressed, buffer.Length, filenameCompressed, memoryStream.Length);
//
// New in 2.0 enhanced Console functionality
//
Trace.WriteLine("New in 2.0 - enhanced Console functionality");
Console.BackgroundColor = ConsoleColor.Yellow;
Console.ForegroundColor = ConsoleColor.Blue;
Console.Title = "Compress FTP file";
Console.WriteLine(stringFormat);
Console.ResetColor();
//
// Read compressed memory stream and write it a compressed file
//
fileStreamCompressed = new FileStream(filenameCompressed, FileMode.Create, FileAccess.Write);
Byte[] bytes = new Byte[memoryStream.Length];
count = memoryStream.Read(bytes, 0, bytes.Length);
fileStreamCompressed.Write(bytes, 0, bytes.Length);
fileStreamCompressed.Flush();
fileStreamCompressed.Close(); // finaly would close but let's close it here to look at in explorer
Trace.WriteLine(filenameCompressed + " Written");
Console.WriteLine("Verify files " + fileName + ".* were written");
Console.BackgroundColor = ConsoleColor.DarkBlue;
Console.WriteLine("The Console can also prompt for input! Enter some Text and press enter");
Console.ResetColor();
string consoleInput = Console.ReadLine();
Console.BackgroundColor = ConsoleColor.DarkBlue;
Console.WriteLine("You entered: " + consoleInput);
Console.BackgroundColor = ConsoleColor.DarkRed;
Console.WriteLine("\nHAL agrees\n");
Console.ResetColor();
Console.WriteLine("Press Enter to Continue");
Console.ReadLine();
}
} // try
catch (Exception Ex)
{
Console.WriteLine(Ex.ToString()); // Log error somewhere
throw Ex; // rethrow the exception up the stack
} // catch
finally
{
// make sure to close system resources - file handles in this case
if (fileStream != null)
fileStream.Close();
if (compressedzipStream != null)
compressedzipStream.Close();
if (memoryStream != null)
memoryStream.Close();
if (fileStreamCompressed != null)
fileStreamCompressed.Close();
} // finally
} // WriteStreamToFile()
} // class Program
} // namespace FTP