protected override async Task ftClientServiceLoopAsync(SslEgg egg)
{
FtClient client = new FtClient(egg.SslStream);
// shortcut lambda
Func <Response, Task <bool> > lSendResponseAsync = async(response) =>
{
return(await CpServersideBase.SendResponseAsync(client.SerializerAsync, response.Success, response.Message));
};
// the command string read from client
var tup = await client.DeserializerAsync.DeserializeAsync("");
bool stillConnected = tup.Item1;
string commandString = tup.Item2;
if (!stillConnected)
{
goto exit;
}
// an array of strings parsed from the sent command string by splitting by colon :
// hard-coded max 10 substrings. Change if needed.
string[] commandSplit = CpParseUtilities.SplitMessage(commandString, m_stringDelimiter, 10);
switch (commandSplit[0].ToLower())
{
case "file_up":
{
Tuple <bool, Response> res = await callChecked_FileUpAsync(client, commandSplit);
if (res.Item1) // client still connected
{
await lSendResponseAsync(res.Item2);
}
break;
}
case "file_down":
{
Tuple <bool, Response> res = await callChecked_FileDownAsync(client, commandSplit);
if (res.Item1) // client still connected
{
await lSendResponseAsync(res.Item2);
}
break;
}
default:
break;
}
exit:
client.Close();
}
protected override async Task <Tuple <bool, Response> > callChecked_FileUpAsync(FtClient ftClient, string[] commandSplit)
{
string errMessage = "";
if (!CpParseUtilities.CheckArgCount(commandSplit, 2, 2, ref errMessage))
{
return(new Tuple <bool, Response>(true, new Response(false, errMessage)));
}
// get filename
string filename = commandSplit[1];
// create a file
using (Stream fileOut = FtFileManager.OpenForWrite(filename, out errMessage))
{
if (fileOut == null)
{
return(new Tuple <bool, Response>(true, new Response(false, errMessage)));
}
// send ok (ready to receive file)
bool stillConnected = await SendResponseAsync(ftClient.SerializerAsync, true, "");
if (!stillConnected)
{
return(new Tuple <bool, Response>(false, null));
}
// receive file
var fileReceiveResult = await FtFileManager.FileReceiveAsync(ftClient.Client, fileOut);
if (!fileReceiveResult.Item1)
{
return(new Tuple <bool, Response>(fileReceiveResult.Item1, null));
}
// send ok (file was received ok)
return(new Tuple <bool, Response>(true, fileReceiveResult.Item2));
}
}
protected override async Task <Tuple <bool, Response> > callChecked_FileDownAsync(FtClient ftClient, string[] commandSplit)
{
string errMessage = "";
if (!CpParseUtilities.CheckArgCount(commandSplit, 2, 2, ref errMessage))
{
return(new Tuple <bool, Response>(true, new Response(false, errMessage)));
}
// get filename
string filename = commandSplit[1];
// open the file
using (Stream fileIn = FtFileManager.OpenForRead(filename, out errMessage))
{
if (fileIn == null)
{
return(new Tuple <bool, Response>(true, new Response(false, errMessage)));
}
// send ok (ready to send file)
bool stillConnected = await SendResponseAsync(ftClient.SerializerAsync, true, "");
if (!stillConnected)
{
return(new Tuple <bool, Response>(false, null));
}
// send file
stillConnected = await FtFileManager.FileSendAsync(ftClient.Client, fileIn);
if (!stillConnected)
{
return(new Tuple <bool, Response>(false, null));
}
}
return(new Tuple <bool, Response>(true, new Response(true, "")));
}
protected virtual async Task <Tuple <bool, Response> > callChecked_FileDownAsync(FtClient ftClient, string[] commandSplit)
{
return(new Tuple <bool, Response>(true, new Response(false, "File transfer not supported by this server.")));
}