/// <summary>
/// Initializes a new instance of the <see cref="file_client"/> class.
///
/// file_client metoden opretter en peer-to-peer forbindelse
/// Sender en forspørgsel for en bestemt fil om denne findes på serveren
/// Modtager filen hvis denne findes eller en besked om at den ikke findes (jvf. protokol beskrivelse)
/// Lukker alle streams og den modtagede fil
/// Udskriver en fejl-meddelelse hvis ikke antal argumenter er rigtige
/// </summary>
/// <param name='args'>
/// Filnavn med evtuelle sti.
/// </param>
private file_client(String[] args, Transport transportStream)
{
try
{
Console.WriteLine ("Retrieving file");
string fileToReceive = (args.Length > 0) ? args[0] : "billede.jpg";
transportStream.sendText(fileToReceive);
//Read confirmation that file exists
if (transportStream.readText() == "File found")
{
receiveFile (fileToReceive, transportStream);
}
else
{
Console.WriteLine ("404 - File not found");
}
}
catch (Exception ex)
{
Console.WriteLine ("Generel exception occured");
Console.WriteLine(ex.Message);
}
finally
{
}
}
/// <summary>
/// Initializes a new instance of the <see cref="file_server"/> class.
/// </summary>
private file_server(Transport transport)
{
try
{
Console.WriteLine("Server started - Listening for client");
//Get filename
string fileToSend = transport.readText();
Console.WriteLine("Client trying to retrieve file: " + fileToSend);
long fileSize = LIB.check_File_Exists (fileToSend);
if (fileSize != 0)
{
transport.sendText("File found");
sendFile (fileToSend, fileSize, transport);
}
else
{
transport.sendText("File not found");
Console.WriteLine ("404 - File not found");
}
}
catch (Exception ex)
{
Console.WriteLine (ex.Message);
}
finally
{
Console.WriteLine ("Exit");
}
}
/// <summary>
/// Receives the file.
/// </summary>
/// <param name='fileName'>
/// File name.
/// </param>
/// <param name='transport'>
/// Transportlaget
/// </param>
private void receiveFile(String fileName, Transport transportStream)
{
long fileSize = long.Parse(transportStream.readText());
Console.WriteLine ("Size of file: " + fileSize);
byte[] RecData = new byte[BUFSIZE];
int RecBytes;
int totalrecbytes = 0;
FileStream Fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Write);
while (fileSize > totalrecbytes)
{
RecBytes = transportStream.receive (ref RecData);
Fs.Write (RecData, 0, RecBytes);
totalrecbytes += RecBytes;
Console.Write ("\rReceived " + totalrecbytes + " bytes from server");
}
Console.WriteLine ("\nFile transfer complete - Closing connection");
Fs.Close();
}