|
public ReadAsync ( char buffer, int index, int count ) : Task |
||
| buffer | char | |
| index | int | |
| count | int | |
| return | Task |
|
private async Task logFromStream(Stream stream, CancellationToken token, string category, Func<bool> isComplete)
{
char[] buffer = new char[128];
using (var sr = new StreamReader(stream))
{
while (true)
{
token.ThrowIfCancellationRequested();
var outBytesRead = await sr.ReadAsync(buffer, 0, buffer.Length);
if (outBytesRead == 0)
{
if (isComplete())
break;
else
await Task.Delay(100);
}
else
{
var outText = new string(buffer, 0, outBytesRead);
if (!string.IsNullOrEmpty(outText))
this.newLogEntry(outText, category, true, true);
}
}
}
}
public override async Task ReadAsync(StreamReader reader)
{
var buffer = new char[valorFixo.Length];
var read = await reader.ReadAsync(buffer, 0, buffer.Length);
if (read != buffer.Length || new string(buffer) != valorFixo)
throw new LeituraException($"O valor fixo '{valorFixo}' não foi encontrado.");
}
private async Task<DataBlock> ReadBlockAsync(StreamReader reader, DataBlock target)
{
var readBytes = await reader.ReadAsync(target.Data, 0, BufferSize);
if (readBytes != BufferSize)
{
target.ResizeData(readBytes);
}
return target;
}
public static async Task<IHttpPost> Create(StreamReader reader, int postContentLength)
{
char[] rawEncoded = new char[postContentLength];
int readBytes = await reader.ReadAsync(rawEncoded, 0, rawEncoded.Length);
byte[] raw = Encoding.UTF8.GetBytes(rawEncoded, 0, readBytes);
return new HttpPost(raw, readBytes);
}
public static async void CreateListener(Action<string> action, TcpClient tcpClient)
{
var networkStream = tcpClient.GetStream();
var r = new StreamReader(networkStream);
var buffer = new char[1];
while (true)
{
if (r.EndOfStream)
{
Task.Delay(500);
continue;
}
await r.ReadAsync(buffer, 0, buffer.Length);
action(new string(buffer));
}
}
/// <summary>
/// Utility method that fills a StringBuilder
/// </summary>
/// <param name="data">Stream containing document data.</param>
/// <returns>Content of the stream as a string.</returns>
public static async Task<string> ReadStreamAsync(Stream data, int blockSize=4096)
{
var buffer = new char[blockSize];
var builder = new StringBuilder();
using (var reader = new StreamReader(data))
{
while (!reader.EndOfStream)
{
// StreamReader.ReadAsync() returns number of *chars* read, not number of bytes, in
// spite of what the API docs say. I read the code (MW 2015.11.06)
var charsRead = await reader.ReadAsync(buffer, 0, blockSize).ConfigureAwait(false);
builder.Append(buffer, 0, charsRead);
}
}
return builder.ToString();
}
/// <summary>
/// Asynchronous method to analyze the data stream.
/// </summary>
/// <param name="data">Data stream to analyze.</param>
/// <param name="blockSize">Max number of characters to read at a time.</param>
/// <returns>Result of the analysis.</returns>
public async Task<IAnalyzerResult> AnalyzeAsync(Stream data, int blockSize = 1024)
{
var result = new CharacterAnalyzerResult();
var buffer = new char[blockSize];
using (var reader = new StreamReader(data))
{
var lastCharType = CharacterType.Invalid;
while (!reader.EndOfStream)
{
var count = await reader.ReadAsync(buffer, 0, blockSize).ConfigureAwait(false);
lastCharType = AnalyzeBuffer(buffer, count, result, lastCharType);
}
}
return result;
}
public static async Task <int> ReadToMemoryAsync(this StreamReader stream, Memory <char> memory)
{
var buffer = BufferArrayPool <char> .Rent(memory.Length);
var totalRead = 0;
try
{
totalRead = await stream.ReadAsync(buffer, 0, memory.Length);
buffer.AsSpan().Slice(0, totalRead).CopyTo(memory.Span);
}
finally
{
Array.Clear(buffer, 0, totalRead);
BufferArrayPool <char> .Return(buffer);
}
return(totalRead);
}
private static async Task <string> InternalReadAllTextAsync(string path, Encoding encoding, CancellationToken cancellationToken)
{
Debug.Assert(!string.IsNullOrEmpty(path));
Debug.Assert(encoding != null);
char[] buffer = null;
StringBuilder sb = null;
StreamReader sr = AsyncStreamReader(path, encoding);
try
{
cancellationToken.ThrowIfCancellationRequested();
sb = StringBuilderCache.Acquire();
buffer = ArrayPool <char> .Shared.Rent(sr.CurrentEncoding.GetMaxCharCount(DefaultBufferSize));
for (;;)
{
int read = await sr.ReadAsync(buffer, 0, buffer.Length).ConfigureAwait(false);
if (read == 0)
{
return(sb.ToString());
}
sb.Append(buffer, 0, read);
cancellationToken.ThrowIfCancellationRequested();
}
}
finally
{
sr.Dispose();
if (buffer != null)
{
ArrayPool <char> .Shared.Return(buffer);
}
if (sb != null)
{
StringBuilderCache.Release(sb);
}
}
}
private static async Task<bool> WaitForPrompt(StreamReader reader, string prompt)
{
var buffer = new char[1024];
int read;
var readString = string.Empty;
while ((read = await reader.ReadAsync(buffer, 0, buffer.Length)) > 0)
{
readString += new string(buffer, 0, read);
if (readString.TrimEnd().EndsWith(prompt))
{
Console.Write(readString);
return true;
}
}
Console.Write(readString);
return false;
}
public static async Task HandleClientAccessPolicy(TcpClient client, string policyResponse)
{
using (var clientStream = client.GetStream())
{
string request = string.Empty;
var reader = new StreamReader(clientStream);
var charArray = new char[2048];
var length = await reader.ReadAsync(charArray, 0, 2048);
request = new String(charArray, 0, length);
if (request == PolicyRequest)
{
var writer = new StreamWriter(clientStream, Encoding.UTF8);
writer.AutoFlush = true;
await writer.WriteAsync(policyResponse);
}
}
client.Close();
}
static async Task ReadStreamToEnd(StreamReader stream, IObserver<string> observable) {
try {
var readBuffer = new char[1];
var lineBuffer = new StringBuilder();
while ((await stream.ReadAsync(readBuffer, 0, 1).ConfigureAwait(false)) > 0) {
var c = readBuffer[0];
lineBuffer.Append(c);
// This does not account for unterminated lines.... like 'verifying download...'
// We would be able to do this by sending the data also byte by byte to the receivers, but for little gain.
if (c != '\r' && c != '\n')
continue;
observable.OnNext(lineBuffer.ToString());
lineBuffer.Clear();
}
if (lineBuffer.Length > 0)
observable.OnNext(lineBuffer.ToString());
} finally {
observable.OnCompleted();
}
}
/// <summary>
/// Lee el archivo en pedazos de 4096 bytes, y llena el diccionario indicando
/// que letras existen en el archivo y cuantas veces aparece cada una de ellas.
/// </summary>
/// <returns>
/// Retorna una tarea ya que es un proceso que puede ejecutarse en otro
/// hilo para no bloquear la UI.
/// </returns>
public async Task<DocumentoProcesado> Procesar()
{
var palabras = new SortedDictionary<string, int>();
var letras = new SortedDictionary<char, int>();
var signos = new SortedDictionary<char, int>();
var simbolos = new SortedDictionary<char, int>();
int palabrasCantidad = 0;
int letrasCantidad = 0;
int signosCantidad = 0;
int simbolosCantidad = 0;
int bytesLeidos = 0;
// Se asume que todos los archivos tendrán encoding de UTF8
// a menos que el sistema pueda detectarlo por el order de bytes.
using (var reader = new StreamReader(rutaArchivo, Encoding.UTF8, detectEncodingFromByteOrderMarks: true, bufferSize: bufferSize))
{
var letrasPalabra = new List<char>();
var buffer = new char[bufferSize];
var count = 0;
do
{
// se lee un fragmento de 4096 bytes del archivo
count = await reader.ReadAsync(buffer, 0, bufferSize);
// Se analiza cada una de esas 4096 letras leÃdas
// y si no se encuentran en el diccionario aún se
// agregan con valor de uno,
// pero si la letra ya existe en el diccionario,
// solo se incrementa en uno su valor.
for (int i = 0; i < count; i++)
{
var caracter = buffer[i];
if (char.IsLetter(caracter))
{
letrasCantidad++;
var c = char.ToLowerInvariant(caracter);
letrasPalabra.Add(c);
if (letras.ContainsKey(c))
{
letras[c]++;
}
else
{
letras.Add(c, 1);
}
}
else if (letrasPalabra.Count > 0)
{
if (letrasPalabra.Count <= 5)
{
palabrasCantidad++;
var palabra = new string(letrasPalabra.ToArray()).ToLowerInvariant();
if (palabras.ContainsKey(palabra))
{
palabras[palabra]++;
}
else
{
palabras.Add(palabra, 1);
}
}
letrasPalabra.Clear();
}
if (char.IsPunctuation(caracter))
{
signosCantidad++;
if (signos.ContainsKey(caracter))
{
signos[caracter]++;
}
else
{
signos.Add(caracter, 1);
}
}
if (char.IsSymbol(caracter))
{
simbolosCantidad++;
if (simbolos.ContainsKey(caracter))
{
simbolos[caracter]++;
}
else
{
simbolos.Add(caracter, 1);
}
}
}
// se lleva la cuenta de la cantidad de bytes que se van leyendo hasta el momento.
bytesLeidos += count;
// Se notifica el avance con la nueva cantidad de bytes para que la UI pueda
// conocer el avance y actualizar un progressbar o algo por el estilo.
NotificarAvance(bytesLeidos);
} while (count != 0);
NotificarAvance(pesoArchivo);
}
return new DocumentoProcesado
{
Letras = letras,
Palabras = palabras,
Signos = signos,
Simbolos = simbolos//,
//CantidadLetras = letrasCantidad,
//CantidadPalabras = palabrasCantidad,
//CantidadSignos = signosCantidad,
//CantidadSimbolos = simbolosCantidad
};
}
/*
*METHOD : clientThread
*
*DESCRIPTION : Method to listen to a spesific users pipe
* Is creates the connection, listens for a command
* then acts acordingly based on that command
*
*PARAMETERS : object sender: Opject relaying information on where the even call came from
* EventArgs e: Object that contains data about the event
*
*RETURNS : void
*
*/
private async void clientThread(object clientPipeName)
{
string serverName = "";
string pipeName = (string)clientPipeName;
NamedPipeClientStream client;
NamedPipeServerStream server;
StreamReader input;
StreamWriter output;
DAL dal = new DAL();
string userName = "";
//set up pipe security
PipeSecurity ps = new PipeSecurity();
System.Security.Principal.SecurityIdentifier sid = new System.Security.Principal.SecurityIdentifier(System.Security.Principal.WellKnownSidType.WorldSid, null);
PipeAccessRule par = new PipeAccessRule(sid, PipeAccessRights.ReadWrite, System.Security.AccessControl.AccessControlType.Allow);
ps.AddAccessRule(par);
Logger.Log("Client thread started");
//wait for user to connect
server = new NamedPipeServerStream(clientPipeName + "service", PipeDirection.InOut, 1, PipeTransmissionMode.Byte, PipeOptions.Asynchronous, 5000, 5000, ps);
server.WaitForConnection();
input = new StreamReader(server);
Logger.Log("Client connected to pipe: " + clientPipeName);
//get the name of the computer to connect back to
serverName = input.ReadLine();
//connect back
try
{
client = new NamedPipeClientStream(serverName, clientPipeName + "User");
client.Connect(30);
output = new StreamWriter(client);
Logger.Log("User thread connected to pipe: " + clientPipeName);
//start loop to watch the pipe
while (!Done)
{
//async read from pipe
char[] temp = new char[5000];
await input.ReadAsync(temp, 0, 5000);
//move data from pipe to a string (padded with somthing, not sure what)
string userCommand = new string(temp);
//all commands end in a period. if there is no period then the user left
if (!userCommand.Contains("."))
{
Logger.Log("Pipe: " + clientPipeName + "userLeft");
//close connection
output.Dispose();
input.Dispose();
//remove from repo
clients.DeleteClient((string)clientPipeName);
break;
}
//if the command is valid
//remove the period and all padded data
userCommand = userCommand.Remove(userCommand.IndexOf('.'));
Logger.Log("Pipe: " + clientPipeName + " Got Command: " + userCommand);
//select the command entered
if (userCommand == "NewUser")
{
Logger.Log("Pipe: " + clientPipeName + "in newUser command code");
//read in user name
userName = input.ReadLine();
//add to database
output.WriteLine("OK");
output.Flush();
//if user not in database add
dal.OpenConnection();
bool isUserTaken = dal.IsNameInDatabase(userName);
dal.CloseConnection();
if (isUserTaken == false)
{
dal.OpenConnection();
dal.StoreUserName(userName);
dal.InitializeUserInLeaderboard(userName, 1);
dal.CloseConnection();
}
}
else if (userCommand == "GetQuestion")
{
Logger.Log("Pipe: " + clientPipeName + "in GetQuestion command code.");
string[] splitbuffer = new string[5];
//read in question number
string buffer = input.ReadLine();
int questionNumber = Int32.Parse(buffer);
Logger.Log("Pipe: " + clientPipeName + "in GetQuestion command code. Getting Question: " + questionNumber);
// get question and answers from database
dal.OpenConnection();
string questionFromDatabase = dal.GetQuestionAndAnswers(questionNumber);
dal.CloseConnection();
//get question data
//put it in questionFromDatabase
splitbuffer = questionFromDatabase.Split('|');
output.WriteLine(splitbuffer[0]);//question
output.Flush();
output.WriteLine(splitbuffer[1]);//answer1
output.Flush();
output.WriteLine(splitbuffer[2]);//answer2
output.Flush();
output.WriteLine(splitbuffer[3]);//answer3
output.Flush();
output.WriteLine(splitbuffer[4]);//answer4
output.Flush();
output.WriteLine(splitbuffer[5]);//correct answer
output.Flush();
}
else if (userCommand == "QuestionAnswered")
{
Logger.Log("Pipe: " + clientPipeName + "in QuestionAnswered command code");
//read in question number
string questionNumber = input.ReadLine();
int intQuestionNumber = Convert.ToInt32(questionNumber);
//read in users answer
string answer = input.ReadLine();
//read in user score
string score = input.ReadLine();
int intScore = Convert.ToInt32(score);
//send to database
dal.OpenConnection();
dal.StoreUserAnswer(userName, 1, intQuestionNumber, answer, intScore);
dal.CloseConnection();
output.WriteLine("OK");
output.Flush();
}
else if (userCommand == "GameDone")
{
Logger.Log("Pipe: " + clientPipeName + "in GameDone command code");
//read in users score for the game
string gameScore = input.ReadLine();
int intGameScore = Convert.ToInt32(gameScore);
//save to database
dal.OpenConnection();
dal.AlterLeaderboard(1, userName, intGameScore);
dal.CloseConnection();
//get leaderboard from database
dal.OpenConnection();
string leaderboard = dal.Leaderboard(1); //get leaderboard from database
dal.CloseConnection();
//send leaderboard to user
output.WriteLine(leaderboard);
output.Flush();
}
else if (userCommand == "GetLeaderboard")
{
Logger.Log("Pipe: " + clientPipeName + "in GetLeaderboard command code");
dal.OpenConnection();
string leaderboard = dal.Leaderboard(1); //get leaderboard from database
dal.CloseConnection();
//send leaderboard to user
output.WriteLine(leaderboard);
output.Flush();
}
else if (userCommand == "GetCurrentStatus")
{
Logger.Log("Pipe: " + clientPipeName + "in GetCurrentStatus command code");
dal.OpenConnection();
string currentStatus = dal.GetCurrentStatus(1); //get currentStatus from database
dal.CloseConnection();
//send currentStatus to user
output.WriteLine(currentStatus);
output.Flush();
}
else if (userCommand == "SaveQuestion")
{
Logger.Log("Pipe: " + clientPipeName + "in SaveQuestion command code");
int questionNumber = Int32.Parse(input.ReadLine());
string question = input.ReadLine();
string answer1 = input.ReadLine();
string answer2 = input.ReadLine();
string answer3 = input.ReadLine();
string answer4 = input.ReadLine();
int correctAnswer = Int32.Parse(input.ReadLine());
//send question to database
dal.OpenConnection();
dal.UpdateQuestionAndAnswer(questionNumber, question, answer1, answer2, answer3, answer4, correctAnswer);
dal.CloseConnection();
output.WriteLine("ok");
output.Flush();
}
else if (userCommand == "GetExcel")
{
Logger.Log("Pipe: " + clientPipeName + "in GetExcel command code");
//send all of the questions
for (int counter = 0; counter < 10; counter++)
{
dal.OpenConnection();
String question = dal.GetQuestion(counter + 1);
dal.CloseConnection();
output.WriteLine(question);
output.Flush();
}
//send the average time to answer correctly
for (int counter = 0; counter < 10; counter++)
{
dal.OpenConnection();
float currentAverageTime = dal.GetAverageTimeToAnswerCorrectly(counter + 1);
dal.CloseConnection();
output.WriteLine(currentAverageTime);
output.Flush();
}
//send the percent of users who answered correctly
for (int counter = 0; counter < 10; counter++)
{
dal.OpenConnection();
float currentQuestionPercent = dal.GetPercentOfUsersWhoAnsweredCorrectly(counter + 1);
dal.CloseConnection();
output.WriteLine(currentQuestionPercent);
output.Flush();
}
}
else if (userCommand == "Quit")
{
Logger.Log("Pipe: " + clientPipeName + "Closing");
//close connection
output.Dispose();
input.Dispose();
//remove from repo
clients.DeleteClient((string)clientPipeName);
//change user to inactive
dal.OpenConnection();
dal.SetUserToInactive(userName);
dal.CloseConnection();
break;
}
else
{
Logger.Log("Pipe: " + clientPipeName + "Command not recognized");
}
}
//when the loop is done then the user is no longer active
dal.OpenConnection();
dal.SetUserToInactive(userName);
dal.CloseConnection();
}
catch(Exception ex)
{
Logger.Log("Pipe: " + clientPipeName + " unknown error: " + ex.Message);
clients.DeleteClient((string)clientPipeName);
dal.OpenConnection();
dal.SetUserToInactive(userName);
dal.CloseConnection();
}
}
/// <summary>
/// Handle an incoming SMTP connection, from connection to completion.
/// </summary>
/// <param name="parameters">SmtpProxyConnectionArguments object containing all parameters for this connection.</param>
private async void ProcessConnection(object parameters)
{
// Cast the passed-in parameters back to their original objects.
SmtpProxyConnectionArguments arguments = (SmtpProxyConnectionArguments)parameters;
// The overall number of bytes transmitted on this connection.
ulong bytesTransmitted = 0;
TcpClient client = null;
Stream clientStream = null;
StreamReader clientStreamReader = null;
StreamWriter clientStreamWriter = null;
string ip = "";
try
{
client = arguments.TcpClient;
clientStream = client.GetStream();
// Placeholder variables to be populated throughout the client session.
NetworkCredential credential = arguments.RemoteServerCredential;
string fromAddress = "";
string identity = "";
List<string> toList = new List<string>();
bool sending = false, inPlainAuth = false, inLoginAuth = false;
// A byte array to streamline bit shuffling.
char[] buffer = new char[Constants.SMALLBUFFERSIZE];
// Capture the client's IP information.
PropertyInfo pi = clientStream.GetType().GetProperty("Socket", BindingFlags.NonPublic | BindingFlags.Instance);
ip = ((Socket)pi.GetValue(clientStream, null)).RemoteEndPoint.ToString();
if (ip.IndexOf(":") > -1)
ip = ip.Substring(0, ip.IndexOf(":"));
// If the IP address range filter contains the localhost entry 0.0.0.0, check if the client IP is a local address and update it to 0.0.0.0 if so.
if (arguments.AcceptedIPs.IndexOf("0.0.0.0") > -1)
{
if (ip == "127.0.0.1")
ip = "0.0.0.0";
else
{
IPHostEntry hostEntry = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress hostIP in hostEntry.AddressList)
{
if (hostIP.ToString() == ip)
{
ip = "0.0.0.0";
break;
}
}
}
}
clientStreamReader = new StreamReader(clientStream);
clientStreamWriter = new StreamWriter(clientStream);
clientStreamWriter.AutoFlush = true;
// Validate that the IP address is within an accepted range.
if (!ProxyFunctions.ValidateIP(arguments.AcceptedIPs, ip))
{
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "Connection rejected from {" + ip + "} due to its IP address.", Proxy.LogLevel.Warning, LogLevel);
await Functions.SendStreamStringAsync(clientStreamWriter, "500 IP address [" + ip + "] rejected.\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 500 IP address [" + ip + "] rejected.", Proxy.LogLevel.Raw, LogLevel);
if (clientStream != null)
clientStream.Dispose();
if (client != null)
client.Close();
return;
}
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "New connection established from {" + ip + "}.", Proxy.LogLevel.Information, LogLevel);
// Send our welcome message.
await Functions.SendStreamStringAsync(clientStreamWriter, "220 " + WelcomeMessage + "\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "220 " + WelcomeMessage, Proxy.LogLevel.Raw, LogLevel);
// Instantiate an SmtpClient for sending messages to the remote server.
using (OpaqueMail.Net.SmtpClient smtpClient = new OpaqueMail.Net.SmtpClient(arguments.RemoteServerHostName, arguments.RemoteServerPort))
{
smtpClient.EnableSsl = arguments.RemoteServerEnableSsl;
smtpClient.Credentials = arguments.RemoteServerCredential;
if (arguments.SmimeValidCertificates != null)
smtpClient.SmimeValidCertificates = arguments.SmimeValidCertificates;
// Loop through each received command.
string command = "";
bool stillReceiving = true;
while (Started && stillReceiving)
{
int bytesRead = await clientStreamReader.ReadAsync(buffer, 0, Constants.SMALLBUFFERSIZE);
if (bytesRead > 0)
{
bytesTransmitted += (ulong)bytesRead;
command += new string(buffer, 0, bytesRead);
if (command.EndsWith("\r\n"))
{
// Handle continuations of current "DATA" commands.
if (sending)
{
// Handle the finalization of a "DATA" command.
if (command.EndsWith("\r\n.\r\n"))
{
sending = false;
string messageFrom = "", messageSubject = "", messageSize = "";
try
{
string messageText = command.Substring(0, command.Length - 5);
// Export the message to a local directory.
if (!string.IsNullOrEmpty(arguments.ExportDirectory))
{
string messageId = Functions.ReturnBetween(messageText.ToLower(), "message-id: <", ">");
if (string.IsNullOrEmpty(messageId))
messageId = Guid.NewGuid().ToString();
string userName = "";
if (smtpClient.Credentials != null)
userName = ((NetworkCredential)smtpClient.Credentials).UserName;
string fileName = ProxyFunctions.GetExportFileName(arguments.ExportDirectory, messageId, arguments.InstanceId, userName);
File.WriteAllText(fileName, messageText);
}
ReadOnlyMailMessage message = new ReadOnlyMailMessage(messageText, ReadOnlyMailMessageProcessingFlags.IncludeRawHeaders | ReadOnlyMailMessageProcessingFlags.IncludeRawBody);
if (!string.IsNullOrEmpty(arguments.FixedFrom))
{
message.From = Functions.FromMailAddressString(arguments.FixedFrom)[0];
if (message.RawHeaders.Contains("From: "))
message.RawHeaders = Functions.ReplaceBetween(message.RawHeaders, "From: ", "\r\n", Functions.ToMailAddressString(message.From));
else
message.RawHeaders = message.RawHeaders.Replace("\r\nSubject: ", "\r\nFrom: " + Functions.ToMailAddressString(message.From) + "\r\nSubject: ");
}
if (!string.IsNullOrEmpty(arguments.FixedTo))
{
MailAddressCollection addresses = Functions.FromMailAddressString(arguments.FixedTo);
foreach (MailAddress address in addresses)
{
bool addressFound = false;
foreach (MailAddress existingAddress in message.To)
{
if (existingAddress.Address.ToUpper() == address.Address.ToUpper())
addressFound = true;
}
if (!addressFound)
message.To.Add(address);
}
if (message.RawHeaders.Contains("To: "))
message.RawHeaders = Functions.ReplaceBetween(message.RawHeaders, "To: ", "\r\n", Functions.ToMailAddressString(message.To));
else
message.RawHeaders = message.RawHeaders.Replace("\r\nSubject: ", "\r\nTo: " + Functions.ToMailAddressString(message.To) + "\r\nSubject: ");
}
if (!string.IsNullOrEmpty(arguments.FixedCC))
{
MailAddressCollection addresses = Functions.FromMailAddressString(arguments.FixedCC);
foreach (MailAddress address in addresses)
{
bool addressFound = false;
foreach (MailAddress existingAddress in message.CC)
{
if (existingAddress.Address.ToUpper() == address.Address.ToUpper())
addressFound = true;
}
if (!addressFound)
message.CC.Add(address);
}
if (message.RawHeaders.Contains("CC: "))
message.RawHeaders = Functions.ReplaceBetween(message.RawHeaders, "CC: ", "\r\n", Functions.ToMailAddressString(message.To));
else
message.RawHeaders = message.RawHeaders.Replace("\r\nSubject: ", "\r\nTo: " + Functions.ToMailAddressString(message.To) + "\r\nSubject: ");
}
if (!string.IsNullOrEmpty(arguments.FixedBcc))
{
MailAddressCollection addresses = Functions.FromMailAddressString(arguments.FixedBcc);
foreach (MailAddress address in addresses)
{
bool addressFound = false;
foreach (MailAddress existingAddress in message.Bcc)
{
if (existingAddress.Address.ToUpper() == address.Address.ToUpper())
addressFound = true;
}
if (!addressFound)
message.Bcc.Add(address);
}
}
// Insert the fixed signature if one exists.
if (!string.IsNullOrEmpty(arguments.FixedSignature))
{
int endBodyPos = message.Body.IndexOf("</BODY>", StringComparison.OrdinalIgnoreCase);
if (endBodyPos > -1)
message.Body = message.Body.Substring(0, endBodyPos) + arguments.FixedSignature + message.Body.Substring(endBodyPos);
else
message.Body += arguments.FixedSignature;
}
// If the received message is already signed or encrypted and we don't want to remove previous S/MIME operations, forward it as-is.
string contentType = message.ContentType;
if ((contentType.StartsWith("application/pkcs7-mime") || contentType.StartsWith("application/x-pkcs7-mime") || contentType.StartsWith("application/x-pkcs7-signature")) && !arguments.SmimeRemovePreviousOperations)
{
message.SmimeSigned = message.SmimeEncryptedEnvelope = message.SmimeTripleWrapped = false;
await smtpClient.SendAsync(message);
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: " + message, Proxy.LogLevel.Raw, LogLevel);
}
else
{
messageFrom = message.From.Address;
messageSubject = message.Subject;
messageSize = message.Size.ToString("N0");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "Forwarding message from {" + message.From.Address + "} with subject {" + message.Subject + "} and size of {" + message.Size.ToString("N0") + "}.", Proxy.LogLevel.Verbose, LogLevel);
foreach (string toListAddress in toList)
{
if (!message.AllRecipients.Contains(toListAddress))
{
message.AllRecipients.Add(toListAddress);
message.Bcc.Add(toListAddress);
}
}
// Attempt to sign and encrypt the envelopes of all messages, but still send if unable to.
message.SmimeSettingsMode = SmimeSettingsMode.BestEffort;
// Apply S/MIME settings.
message.SmimeSigned = arguments.SmimeSigned;
message.SmimeEncryptedEnvelope = arguments.SmimeEncryptedEnvelope;
message.SmimeTripleWrapped = arguments.SmimeTripleWrapped;
// Look up the S/MIME signing certificate for the current sender. If it doesn't exist, create one.
message.SmimeSigningCertificate = CertHelper.GetCertificateBySubjectName(StoreLocation.LocalMachine, message.From.Address);
if (message.SmimeSigningCertificate == null)
message.SmimeSigningCertificate = CertHelper.CreateSelfSignedCertificate("E=" + message.From.Address, message.From.Address, StoreLocation.LocalMachine, true, 4096, 10);
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "C: " + message.RawHeaders + "\r\n\r\n" + message.RawBody, Proxy.LogLevel.Raw, LogLevel);
// Send the message.
await smtpClient.SendAsync(message.AsMailMessage());
// Check the signing certificate's expiration to determine if we should send a reminder.
if (arguments.SendCertificateReminders && message.SmimeSigningCertificate != null)
{
string expirationDateString = message.SmimeSigningCertificate.GetExpirationDateString();
TimeSpan expirationTime = DateTime.Parse(expirationDateString) - DateTime.Now;
if (expirationTime.TotalDays < 30)
{
bool sendReminder = true;
if (CertificateReminders.ContainsKey(message.SmimeSigningCertificate))
{
TimeSpan timeSinceLastReminder = DateTime.Now - CertificateReminders[message.SmimeSigningCertificate];
if (timeSinceLastReminder.TotalHours < 24)
sendReminder = false;
}
// Send the reminder message.
if (sendReminder)
{
OpaqueMail.Net.MailMessage reminderMessage = new OpaqueMail.Net.MailMessage(message.From, message.From);
reminderMessage.Subject = "OpaqueMail: S/MIME Certificate Expires " + expirationDateString;
reminderMessage.Body = "Your OpaqueMail S/MIME Certificate will expire in " + ((int)expirationTime.TotalDays) + " days on " + expirationDateString + ".\r\n\r\n" +
"Certificate Subject Name: " + message.SmimeSigningCertificate.Subject + "\r\n" +
"Certificate Serial Number: " + message.SmimeSigningCertificate.SerialNumber + "\r\n" +
"Certificate Issuer: " + message.SmimeSigningCertificate.Issuer + "\r\n\r\n" +
"Please renew or enroll a new certificate to continue protecting your e-mail privacy.\r\n\r\n" +
"This is an automated message sent from the OpaqueMail Proxy on " + Functions.GetLocalFQDN() + ". " +
"For more information, visit http://opaquemail.org/.";
reminderMessage.SmimeEncryptedEnvelope = message.SmimeEncryptedEnvelope;
reminderMessage.SmimeEncryptionOptionFlags = message.SmimeEncryptionOptionFlags;
reminderMessage.SmimeSettingsMode = message.SmimeSettingsMode;
reminderMessage.SmimeSigned = message.SmimeSigned;
reminderMessage.SmimeSigningCertificate = message.SmimeSigningCertificate;
reminderMessage.SmimeSigningOptionFlags = message.SmimeSigningOptionFlags;
reminderMessage.SmimeTripleWrapped = message.SmimeTripleWrapped;
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "Certificate with Serial Number {" + message.SmimeSigningCertificate.SerialNumber + "} expiring. Sending reminder to {" + message.From.Address + "}.", Proxy.LogLevel.Information, LogLevel);
await smtpClient.SendAsync(reminderMessage);
CertificateReminders[message.SmimeSigningCertificate] = DateTime.Now;
}
}
}
}
await Functions.SendStreamStringAsync(clientStreamWriter, "250 Forwarded\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 250 Forwarded", Proxy.LogLevel.Raw, LogLevel);
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "Message from {" + message.From.Address + "} with subject {" + message.Subject + "} and size of {" + message.Size.ToString("N0") + "} successfully forwarded.", Proxy.LogLevel.Verbose, LogLevel);
}
catch (Exception ex)
{
// Report if an exception was encountering sending the message.
Functions.SendStreamString(clientStreamWriter, "500 Error occurred when forwarding\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 500 Error occurred when forwarding", Proxy.LogLevel.Raw, LogLevel);
if (arguments.DebugMode || System.Diagnostics.Debugger.IsAttached)
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "Error when forwarding message from {" + messageFrom + "} with subject {" + messageSubject + "} and size of {" + messageSize + "}. Exception: " + ex.ToString(), Proxy.LogLevel.Error, LogLevel);
else
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "Error when forwarding message from {" + messageFrom + "} with subject {" + messageSubject + "} and size of {" + messageSize + "}. Exception: " + ex.Message, Proxy.LogLevel.Error, LogLevel);
}
command = "";
}
}
else
{
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "C: " + new string(buffer, 0, bytesRead), Proxy.LogLevel.Raw, LogLevel);
// Handle continuations of current "AUTH PLAIN" commands.
if (inPlainAuth)
{
inPlainAuth = false;
// Split up an AUTH PLAIN handshake into its components.
string authString = Encoding.UTF8.GetString(Convert.FromBase64String(command));
string[] authStringParts = authString.Split(new char[] { '\0' }, 3);
if (authStringParts.Length > 2 && arguments.RemoteServerCredential == null)
smtpClient.Credentials = new NetworkCredential(authStringParts[1], authStringParts[2]);
await Functions.SendStreamStringAsync(clientStreamWriter, "235 OK\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 235 OK", Proxy.LogLevel.Raw, LogLevel);
command = "";
}
// Handle continuations of current "AUTH LOGIN" commands.
else if (inLoginAuth)
{
if (smtpClient.Credentials == null)
{
// Handle the username being received for the first time.
smtpClient.Credentials = new NetworkCredential();
((NetworkCredential)smtpClient.Credentials).UserName = Functions.FromBase64(command.Substring(0, command.Length - 2));
await Functions.SendStreamStringAsync(clientStreamWriter, "334 UGFzc3dvcmQ6\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 334 UGFzc3dvcmQ6", Proxy.LogLevel.Raw, LogLevel);
}
else
{
// Handle the password.
inLoginAuth = false;
((NetworkCredential)smtpClient.Credentials).Password = Functions.FromBase64(command.Substring(0, command.Length - 2));
await Functions.SendStreamStringAsync(clientStreamWriter, "235 OK\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 235 OK", Proxy.LogLevel.Raw, LogLevel);
}
command = "";
}
else
{
// Otherwise, look at the verb of the incoming command.
string[] commandParts = command.Substring(0, command.Length - 2).Replace("\r", "").Split(new char[] { ' ' }, 2);
if (LogLevel == Proxy.LogLevel.Verbose)
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "Command {" + commandParts[0] + "} received.", Proxy.LogLevel.Verbose, LogLevel);
switch (commandParts[0].ToUpper())
{
case "AUTH":
// Support authentication.
if (commandParts.Length > 1)
{
commandParts = command.Substring(0, command.Length - 2).Replace("\r", "").Split(new char[] { ' ' });
switch (commandParts[1].ToUpper())
{
case "PLAIN":
// Prepare to handle a continuation command.
inPlainAuth = true;
await Functions.SendStreamStringAsync(clientStreamWriter, "334 Proceed\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 334 Proceed", Proxy.LogLevel.Raw, LogLevel);
break;
case "LOGIN":
inLoginAuth = true;
if (commandParts.Length > 2)
{
// Parse the username and request a password.
smtpClient.Credentials = new NetworkCredential();
((NetworkCredential)smtpClient.Credentials).UserName = Functions.FromBase64(commandParts[2]);
await Functions.SendStreamStringAsync(clientStreamWriter, "334 UGFzc3dvcmQ6\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 334 UGFzc3dvcmQ6", Proxy.LogLevel.Raw, LogLevel);
}
else
{
// Request a username only.
await Functions.SendStreamStringAsync(clientStreamWriter, "334 VXNlcm5hbWU6\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 334 VXNlcm5hbWU6", Proxy.LogLevel.Raw, LogLevel);
}
break;
default:
// Split up an AUTH PLAIN handshake into its components.
string authString = Encoding.UTF8.GetString(Convert.FromBase64String(commandParts[1].Substring(6)));
string[] authStringParts = authString.Split(new char[] { '\0' }, 3);
if (authStringParts.Length > 2 && arguments.RemoteServerCredential == null)
smtpClient.Credentials = new NetworkCredential(authStringParts[1], authStringParts[2]);
await Functions.SendStreamStringAsync(clientStreamWriter, "235 OK\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 235 OK", Proxy.LogLevel.Raw, LogLevel);
break;
}
}
else
{
await Functions.SendStreamStringAsync(clientStreamWriter, "500 Unknown verb\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 500 Unknown verb", Proxy.LogLevel.Raw, LogLevel);
}
break;
case "DATA":
// Prepare to handle continuation data.
sending = true;
command = command.Substring(6);
await Functions.SendStreamStringAsync(clientStreamWriter, "354 Send message content; end with <CRLF>.<CRLF>\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 354 Send message content; end with <CRLF>.<CRLF>", Proxy.LogLevel.Raw, LogLevel);
break;
case "EHLO":
// Proceed with the login and send a list of supported commands.
if (commandParts.Length > 1)
identity = commandParts[1] + " ";
if (arguments.LocalEnableSsl)
{
await Functions.SendStreamStringAsync(clientStreamWriter, "250-Hello " + identity + "[" + ip + "], please proceed\r\n250-AUTH LOGIN PLAIN\r\n250-RSET\r\n250 STARTTLS\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 250-Hello " + identity + "[" + ip + "], please proceed\r\n250-AUTH LOGIN PLAIN\r\n250-RSET\r\n250 STARTTLS", Proxy.LogLevel.Raw, LogLevel);
}
else
{
await Functions.SendStreamStringAsync(clientStreamWriter, "250-Hello " + identity + "[" + ip + "], please proceed\r\n250-AUTH LOGIN PLAIN\r\n250 RSET\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 250-Hello " + identity + "[" + ip + "], please proceed\r\n250-AUTH LOGIN PLAIN\r\n250 RSET", Proxy.LogLevel.Raw, LogLevel);
}
break;
case "HELO":
// Proceed with the login.
if (commandParts.Length > 1)
identity = commandParts[1];
await Functions.SendStreamStringAsync(clientStreamWriter, "250 Hello " + identity + " [" + ip + "], please proceed\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: Hello " + identity + " [" + ip + "], please proceed", Proxy.LogLevel.Raw, LogLevel);
break;
case "MAIL":
case "SAML":
case "SEND":
case "SOML":
// Accept the from address.
if (commandParts.Length > 1 && commandParts[1].Length > 5)
fromAddress = commandParts[1].Substring(5);
await Functions.SendStreamStringAsync(clientStreamWriter, "250 OK\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 250 OK", Proxy.LogLevel.Raw, LogLevel);
break;
case "NOOP":
// Prolong the current session.
await Functions.SendStreamStringAsync(clientStreamWriter, "250 Still here\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 250 Still here", Proxy.LogLevel.Raw, LogLevel);
break;
case "PASS":
// Support authentication.
if (commandParts.Length > 1 && arguments.RemoteServerCredential == null)
((NetworkCredential)smtpClient.Credentials).Password = commandParts[1];
await Functions.SendStreamStringAsync(clientStreamWriter, "235 OK\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 235 OK", Proxy.LogLevel.Raw, LogLevel);
break;
case "QUIT":
// Wait one second then force the current connection closed.
await Functions.SendStreamStringAsync(clientStreamWriter, "221 Bye\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 221 Bye", Proxy.LogLevel.Raw, LogLevel);
Thread.Sleep(1000);
if (clientStream != null)
clientStream.Dispose();
if (client != null)
client.Close();
break;
case "RCPT":
// Acknolwedge recipients.
if (commandParts.Length > 1 && commandParts[1].Length > 6)
toList.Add(commandParts[1].Substring(5, commandParts[1].Length - 6));
await Functions.SendStreamStringAsync(clientStreamWriter, "250 OK\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 250 OK", Proxy.LogLevel.Raw, LogLevel);
break;
case "RSET":
// Reset the current message arguments.
fromAddress = "";
toList.Clear();
await Functions.SendStreamStringAsync(clientStreamWriter, "250 OK\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 250 OK", Proxy.LogLevel.Raw, LogLevel);
break;
case "STARTTLS":
// If supported, upgrade the session's security through a TLS handshake.
if (arguments.LocalEnableSsl)
{
await Functions.SendStreamStringAsync(clientStreamWriter, "220 Go ahead\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 220 Go ahead", Proxy.LogLevel.Raw, LogLevel);
if (!(clientStream is SslStream))
{
clientStream = new SslStream(clientStream);
((SslStream)clientStream).AuthenticateAsServer(arguments.Certificate);
clientStreamReader = new StreamReader(clientStream);
clientStreamWriter = new StreamWriter(clientStream);
clientStreamWriter.AutoFlush = true;
}
}
else
{
await Functions.SendStreamStringAsync(clientStreamWriter, "500 Unknown verb\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 500 Unknown verb", Proxy.LogLevel.Raw, LogLevel);
}
break;
case "USER":
// Support authentication.
if (commandParts.Length > 1 && arguments.RemoteServerCredential == null)
((NetworkCredential)smtpClient.Credentials).UserName = commandParts[1];
await Functions.SendStreamStringAsync(clientStreamWriter, "235 OK\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 235 OK", Proxy.LogLevel.Raw, LogLevel);
break;
case "VRFY":
// Notify that we can't verify addresses.
await Functions.SendStreamStringAsync(clientStreamWriter, "252 I'm just a proxy\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 252 I'm just a proxy", Proxy.LogLevel.Raw, LogLevel);
break;
default:
await Functions.SendStreamStringAsync(clientStreamWriter, "500 Unknown verb\r\n");
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "S: 500 Unknown verb", Proxy.LogLevel.Raw, LogLevel);
break;
}
command = "";
}
}
}
}
else
stillReceiving = false;
}
}
}
catch (ObjectDisposedException)
{
// Ignore either stream being closed.
}
catch (SocketException ex)
{
if (arguments.DebugMode || System.Diagnostics.Debugger.IsAttached)
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "Exception communicating with {" + arguments.RemoteServerHostName + "} on port {" + arguments.RemoteServerPort + "}: " + ex.ToString(), Proxy.LogLevel.Error, LogLevel);
else
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "Exception communicating with {" + arguments.RemoteServerHostName + "} on port {" + arguments.RemoteServerPort + "}: " + ex.Message, Proxy.LogLevel.Error, LogLevel);
}
catch (Exception ex)
{
if (arguments.DebugMode || System.Diagnostics.Debugger.IsAttached)
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "Exception: " + ex.ToString(), Proxy.LogLevel.Error, LogLevel);
else
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "Exception: " + ex.Message, Proxy.LogLevel.Error, LogLevel);
}
finally
{
ProxyFunctions.Log(LogWriter, SessionId, arguments.ConnectionId, "Connection from {" + ip + "} closed after transmitting {" + bytesTransmitted.ToString("N0") + "} bytes.", Proxy.LogLevel.Information, LogLevel);
// Clean up after any unexpectedly closed connections.
if (clientStreamWriter != null)
clientStreamWriter.Dispose();
if (clientStreamReader != null)
clientStreamReader.Dispose();
if (clientStream != null)
clientStream.Dispose();
if (client != null)
client.Close();
}
}
public async Task<bool> readPackageAsync(StorageFile file)
{
this.deckDescriptionFound = false;
this.deck.filename = file.Name;
bool result = false;
//Locate Archive based on this.packagePath
var folder = ApplicationData.Current.TemporaryFolder;
//Open Archive
Stream stream = await file.OpenStreamForReadAsync();
using (ZipArchive archive = new ZipArchive(stream, ZipArchiveMode.Read))
{
foreach (ZipArchiveEntry en in archive.Entries)
{ //Iterate through Entries
if (en.FullName.Contains("deckdescription.xml"))
{
char[] output = new char[en.Length];
this.deckDescriptionFound = true;
//Open deckdescription.xml and save it into deckXml
using (StreamReader sr = new StreamReader(en.Open()))
{
await sr.ReadAsync(output, 0, (int)en.Length);
//There was some weirdness here, which I'm documenting for the sake of my Memento-esque memory.
//We were hitting all kinds of weird XMLExceptions at the end of certain files (XMLExceptions around the Null character 0x00).
//The UTF-8 files effected always involved some characters that required two bytes. We'd hit this exception after the closing tag ("</deck>")
//When I inspected these files in a Hex editor, there were never any null characters at the end of the file, which was weird.
//My hypothesis was that when we built the output char array using en.Length, that length was returning the length in Bytes, which
//was not the same as the number of characters (since some required 2 bytes). The result was that the output array was longer
//than the string that it was representing, and those extra slots were NULL (excess length was a function of the number of characters
//requiring 2 bytes). Thus, I am trimming the null chars off the end.
//tl;dr: ZipArchiveEntry.Length doesn't actually return the number of characters in the file. This seems obvious in retrospect.
this.deckXml = new String(output).TrimEnd('\0');
}
}
if (en.FullName.EndsWith(".jpg") || en.FullName.EndsWith(".jpeg") || en.FullName.EndsWith(".png"))
{
//Copy Images to LocalStorage - Tmp Folder
using (Stream picdata = en.Open())
{
StorageFile outfile = await folder.CreateFileAsync(en.Name, CreationCollisionOption.ReplaceExisting);
using (Stream outputfilestream = await outfile.OpenStreamForWriteAsync())
{
await picdata.CopyToAsync(outputfilestream);
await outputfilestream.FlushAsync(); //flush makes sure all the bits are written
}
}
}
}
}
//kick off processXml, return result of that.
if (this.deckDescriptionFound)
{
try
{
result = processXml();
}
catch (XmlException e)
{
result = false;
}
}
else
{
result = false;
}
return result;
}
private async Task<Document> LoadFileAsync(ILoader loader, string path, CancellationToken cancellationToken)
{
try
{
using (var file = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, true))
using (var reader = new StreamReader(file))
{
var count = 0;
var buffer = new char[4096];
while ((count = await reader.ReadAsync(buffer, 0, buffer.Length).ConfigureAwait(false)) > 0)
{
// Check for cancellation
cancellationToken.ThrowIfCancellationRequested();
// Add the data to the document
if (!loader.AddData(buffer, count))
{
throw new IOException("The data could not be added to the loader.");
}
}
return loader.ConvertToDocument();
}
}
catch
{
loader.Release();
throw;
}
}
private static async Task<char> ReadChar(StreamReader sr, char[] buf)
{
await sr.ReadAsync(buf, 0, 1);
return buf[0];
}
/// <summary>
/// Loads a file using background document loader, background task (outside UI thread)
/// </summary>
/// <param name="loader">ILoader instance created with CreateLoader() method</param>
/// <param name="path"></param>
/// <param name="cancellationToken"></param>
/// <param name="encoding"></param>
/// <param name="detectBOM"></param>
/// <returns></returns>
private async Task<Document> LoadDocument(ILoader loader, string path, CancellationToken cancellationToken, Encoding encoding = null, bool detectBOM = true) {
var buffer = new char[LoadingBufferSize];
var count = 0;
try {
using (var file = new FileStream(path, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite, bufferSize: LoadingBufferSize, useAsync: true)) {
if (encoding != null) Encoding = encoding;
else if (Encoding == null) Encoding = Encoding.UTF8;
using (var reader = new StreamReader(file, Encoding, detectBOM, LoadingBufferSize)) {
while ((count = await reader.ReadAsync(buffer, 0, buffer.Length).ConfigureAwait(false)) > 0) {
cancellationToken.ThrowIfCancellationRequested();
if (!loader.AddData(buffer, count)) throw new IOException("The data could not be added to the loader.");
}
return loader.ConvertToDocument();
}
}
} catch {
loader.Release();
throw;
}
}
private async void monitorStream(StreamReader streamReader, StandardStreamType type) {
try {
char[] buffer = new char[1024];
using (streamReader)
while (!streamReader.EndOfStream) {
int read = await streamReader.ReadAsync(buffer, 0, 1024);
if (read > 0)
OnStandardDataReceived(streamReader, new StandardDataReceivedEventArgs(type, new string(buffer, 0, read)));
}
}
catch (ObjectDisposedException) { } // in case the stream gets closed elsewhere
catch (NullReferenceException) { }
StandardInputEnabled = false;
Debug.WriteLine("end standard " + type + " stream monitor");
}
/// <summary>
/// Sends the specified message to an SMTP server for delivery without making modifications to the body.
/// Necessary because the standard SmtpClient.Send() may slightly alter messages, invalidating signatures.
/// </summary>
/// <param name="message">An OpaqueMail.MailMessage that contains the message to send.</param>
private async Task SmimeSendRawAsync(MailMessage message)
{
// Connect to the SMTP server.
TcpClient SmtpTcpClient = new TcpClient();
SmtpTcpClient.Connect(Host, Port);
Stream SmtpStream = SmtpTcpClient.GetStream();
// Use stream readers and writers to simplify I/O.
StreamReader reader = new StreamReader(SmtpStream);
StreamWriter writer = new StreamWriter(SmtpStream);
writer.AutoFlush = true;
// Read the welcome message.
string response = await reader.ReadLineAsync();
// Send EHLO and find out server capabilities.
await writer.WriteLineAsync("EHLO " + Host);
char[] charBuffer = new char[Constants.SMALLBUFFERSIZE];
int bytesRead = await reader.ReadAsync(charBuffer, 0, Constants.SMALLBUFFERSIZE);
response = new string(charBuffer, 0, bytesRead);
if (!response.StartsWith("2"))
throw new SmtpException("Unable to connect to remote server '" + Host + "'. Sent 'EHLO' and received '" + response + "'.");
// Stand up a TLS/SSL stream.
if (EnableSsl)
{
await writer.WriteLineAsync("STARTTLS");
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Unable to start TLS/SSL protection with '" + Host + "'. Received '" + response + "'.");
SmtpStream = new SslStream(SmtpStream);
((SslStream)SmtpStream).AuthenticateAsClient(Host);
reader = new StreamReader(SmtpStream);
writer = new StreamWriter(SmtpStream);
writer.AutoFlush = true;
}
// Authenticate using the AUTH LOGIN command.
if (Credentials != null)
{
NetworkCredential cred = (NetworkCredential)Credentials;
await writer.WriteLineAsync("AUTH LOGIN");
response = await reader.ReadLineAsync();
if (!response.StartsWith("3"))
throw new SmtpException("Unable to authenticate with server '" + Host + "'. Received '" + response + "'.");
await writer.WriteLineAsync(Functions.ToBase64String(cred.UserName));
response = await reader.ReadLineAsync();
await writer.WriteLineAsync(Functions.ToBase64String(cred.Password));
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Unable to authenticate with server '" + Host + "'. Received '" + response + "'.");
}
// Build our raw headers block.
StringBuilder rawHeaders = new StringBuilder(Constants.SMALLSBSIZE);
// Specify who the message is from.
rawHeaders.Append(Functions.SpanHeaderLines("From: " + Functions.EncodeMailHeader(Functions.ToMailAddressString(message.From))) + "\r\n");
await writer.WriteLineAsync("MAIL FROM:<" + message.From.Address + ">");
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Exception communicating with server '" + Host + "'. Sent 'MAIL FROM' and received '" + response + "'.");
// Identify all recipients of the message.
if (message.To.Count > 0)
rawHeaders.Append(Functions.SpanHeaderLines("To: " + Functions.EncodeMailHeader(Functions.ToMailAddressString(message.To))) + "\r\n");
foreach (MailAddress address in message.To)
{
await writer.WriteLineAsync("RCPT TO:<" + address.Address + ">");
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Exception communicating with server '" + Host + "'. Sent 'RCPT TO' and received '" + response + "'.");
}
if (message.CC.Count > 0)
rawHeaders.Append(Functions.SpanHeaderLines("CC: " + Functions.EncodeMailHeader(Functions.ToMailAddressString(message.CC))) + "\r\n");
foreach (MailAddress address in message.CC)
{
await writer.WriteLineAsync("RCPT TO:<" + address.Address + ">");
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Exception communicating with server '" + Host + "'. Sent 'RCPT TO' and received '" + response + "'.");
}
foreach (MailAddress address in message.Bcc)
{
await writer.WriteLineAsync("RCPT TO:<" + address.Address + ">");
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Exception communicating with server '" + Host + "'. Sent 'RCPT TO' and received '" + response + "'.");
}
// Send the raw message.
await writer.WriteLineAsync("DATA");
response = await reader.ReadLineAsync();
if (!response.StartsWith("3"))
throw new SmtpException("Exception communicating with server '" + Host + "'. Sent 'DATA' and received '" + response + "'.");
// If a read-only mail message is passed in with its raw headers and body, save a few steps by sending that directly.
if (message is ReadOnlyMailMessage)
await writer.WriteAsync(((ReadOnlyMailMessage)message).RawHeaders + "\r\n" + ((ReadOnlyMailMessage)message).RawBody + "\r\n.\r\n");
else
{
rawHeaders.Append(Functions.SpanHeaderLines("Subject: " + Functions.EncodeMailHeader(message.Subject)) + "\r\n");
foreach (string rawHeader in message.Headers)
{
switch (rawHeader.ToUpper())
{
case "BCC":
case "CC":
case "FROM":
case "SUBJECT":
case "TO":
break;
default:
rawHeaders.Append(Functions.SpanHeaderLines(rawHeader + ": " + message.Headers[rawHeader]) + "\r\n");
break;
}
}
await writer.WriteAsync(rawHeaders.ToString() + "\r\n" + message.Body + "\r\n.\r\n");
}
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Exception communicating with server '" + Host + "'. Sent message and received '" + response + "'.");
// Clean up this connection.
await writer.WriteLineAsync("QUIT");
writer.Dispose();
reader.Dispose();
SmtpStream.Dispose();
SmtpTcpClient.Close();
}
public static async Task <int> ReadAsync(this StreamReader reader, char[] buffer)
{
return(await reader.ReadAsync(buffer, 0, buffer.Length));
}
/// <summary>
/// Sends the specified message to an SMTP server for delivery without making modifications to the body.
/// Necessary because the standard SmtpClient.Send() may slightly alter messages, invalidating signatures.
/// </summary>
/// <param name="message">An OpaqueMail.MailMessage that contains the message to send.</param>
private async Task SmimeSendRawAsync(MailMessage message)
{
// Connect to the SMTP server.
TcpClient SmtpTcpClient = new TcpClient();
SmtpTcpClient.Connect(Host, Port);
Stream SmtpStream = SmtpTcpClient.GetStream();
// Use stream readers and writers to simplify I/O.
StreamReader reader = new StreamReader(SmtpStream);
StreamWriter writer = new StreamWriter(SmtpStream);
writer.AutoFlush = true;
// Read the welcome message.
string response = await reader.ReadLineAsync();
// Send EHLO and find out server capabilities.
await writer.WriteLineAsync("EHLO " + Host);
char[] charBuffer = new char[Constants.SMALLBUFFERSIZE];
int bytesRead = await reader.ReadAsync(charBuffer, 0, Constants.SMALLBUFFERSIZE);
response = new string(charBuffer, 0, bytesRead);
if (!response.StartsWith("2"))
throw new SmtpException("Unable to connect to remote server '" + Host + "'. Sent 'EHLO' and received '" + response + "'.");
// Stand up a TLS/SSL stream.
if (EnableSsl)
{
await writer.WriteLineAsync("STARTTLS");
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Unable to start TLS/SSL protection with '" + Host + "'. Received '" + response + "'.");
SmtpStream = new SslStream(SmtpStream);
((SslStream)SmtpStream).AuthenticateAsClient(Host);
reader = new StreamReader(SmtpStream);
writer = new StreamWriter(SmtpStream);
writer.AutoFlush = true;
await writer.WriteLineAsync("EHLO " + Host);
bytesRead = await reader.ReadAsync(charBuffer, 0, Constants.SMALLBUFFERSIZE);
response = new string(charBuffer, 0, bytesRead);
}
// Authenticate using the AUTH LOGIN command.
if (Credentials != null)
{
NetworkCredential cred = (NetworkCredential)Credentials;
await writer.WriteLineAsync("AUTH LOGIN");
response = await reader.ReadLineAsync();
if (!response.StartsWith("3"))
throw new SmtpException("Unable to authenticate with server '" + Host + "'. Received '" + response + "'.");
await writer.WriteLineAsync(Functions.ToBase64String(cred.UserName));
response = await reader.ReadLineAsync();
await writer.WriteLineAsync(Functions.ToBase64String(cred.Password));
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Unable to authenticate with server '" + Host + "'. Received '" + response + "'.");
}
// Build our raw headers block.
StringBuilder rawHeaders = new StringBuilder(Constants.SMALLSBSIZE);
// Specify who the message is from.
rawHeaders.Append(Functions.SpanHeaderLines("From: " + Functions.EncodeMailHeader(Functions.ToMailAddressString(message.From))) + "\r\n");
await writer.WriteLineAsync("MAIL FROM:<" + message.From.Address + ">");
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Exception communicating with server '" + Host + "'. Sent 'MAIL FROM' and received '" + response + "'.");
// Identify all recipients of the message.
if (message.To.Count > 0)
rawHeaders.Append(Functions.SpanHeaderLines("To: " + Functions.EncodeMailHeader(message.To.ToString())) + "\r\n");
foreach (MailAddress address in message.To)
{
await writer.WriteLineAsync("RCPT TO:<" + address.Address + ">");
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Exception communicating with server '" + Host + "'. Sent 'RCPT TO' and received '" + response + "'.");
}
if (message.CC.Count > 0)
rawHeaders.Append(Functions.SpanHeaderLines("CC: " + Functions.EncodeMailHeader(message.CC.ToString())) + "\r\n");
foreach (MailAddress address in message.CC)
{
await writer.WriteLineAsync("RCPT TO:<" + address.Address + ">");
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Exception communicating with server '" + Host + "'. Sent 'RCPT TO' and received '" + response + "'.");
}
foreach (MailAddress address in message.Bcc)
{
await writer.WriteLineAsync("RCPT TO:<" + address.Address + ">");
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Exception communicating with server '" + Host + "'. Sent 'RCPT TO' and received '" + response + "'.");
}
// Ensure a content type is set.
if (string.IsNullOrEmpty(message.ContentType))
{
if (Functions.AppearsHTML(message.Body))
message.ContentType = "text/html";
else
message.ContentType = "text/plain";
}
message.Headers["Content-Type"] = message.ContentType + (!string.IsNullOrEmpty(message.CharSet) ? "; charset=\"" + message.CharSet + "\"" : "");
// If the body hasn't been processed, handle encoding of extended characters.
if (string.IsNullOrEmpty(message.RawBody))
{
bool extendedCharacterFound = false;
foreach (char headerCharacter in message.Body.ToCharArray())
{
if (headerCharacter > 127)
{
extendedCharacterFound = true;
break;
}
}
if (extendedCharacterFound)
{
message.Headers["Content-Transfer-Encoding"] = "base64";
message.Body = Functions.ToBase64String(message.Body);
}
message.RawBody = message.Body;
}
// Send the raw message.
await writer.WriteLineAsync("DATA");
response = await reader.ReadLineAsync();
if (!response.StartsWith("3"))
throw new SmtpException("Exception communicating with server '" + Host + "'. Sent 'DATA' and received '" + response + "'.");
rawHeaders.Append(Functions.SpanHeaderLines("Subject: " + Functions.EncodeMailHeader(message.Subject)) + "\r\n");
foreach (string rawHeader in message.Headers)
{
switch (rawHeader.ToUpper())
{
case "BCC":
case "CC":
case "FROM":
case "SUBJECT":
case "TO":
break;
default:
rawHeaders.Append(Functions.SpanHeaderLines(rawHeader + ": " + message.Headers[rawHeader]) + "\r\n");
break;
}
}
await writer.WriteAsync(rawHeaders.ToString() + "\r\n" + message.RawBody + "\r\n.\r\n");
response = await reader.ReadLineAsync();
if (!response.StartsWith("2"))
throw new SmtpException("Exception communicating with server '" + Host + "'. Sent message and received '" + response + "'.");
// Clean up this connection.
await writer.WriteLineAsync("QUIT");
writer.Dispose();
reader.Dispose();
SmtpStream.Dispose();
SmtpTcpClient.Close();
}
public async Task<TryResult<string>> TryReadTextFileAsync(string path, CancellationToken cancellationToken)
{
var contentStringBuilder = new StringBuilder();
var operationSucceeded = await TryReadFileCommonAsync(path, async stream =>
{
using (var reader = new StreamReader(stream))
{
var buffer = new char[BufferSize];
while (reader.Peek() > 0)
{
if (cancellationToken.IsCancellationRequested)
return false;
var charsRead = await reader.ReadAsync(buffer, 0, BufferSize);
contentStringBuilder.Append(buffer, 0, charsRead);
}
return true;
};
}).ConfigureAwait(false);
return TryResult.Create(operationSucceeded, operationSucceeded ? contentStringBuilder.ToString() : string.Empty);
}
/// <summary>
/// Returns string representation of message sent over stream.
/// </summary>
/// <param name="streamReader">StreamReader to receive message from.</param>
/// <param name="buffer">A character array to streamline bit shuffling.</param>
/// <returns>Any text read from the stream connection.</returns>
public async static Task<string> ReadStreamStringAsync(StreamReader streamReader, char[] buffer)
{
int bytesRead = await streamReader.ReadAsync(buffer, 0, buffer.Length);
return new string(buffer, 0, bytesRead);
}
public async Task CopyFilesAsync(StreamReader source, StreamWriter destination)
{
_logger.Info("[NextPvr] Start CopyFiles Async");
char[] buffer = new char[0x1000];
int numRead;
while ((numRead = await source.ReadAsync(buffer, 0, buffer.Length)) != 0)
{
await destination.WriteAsync(buffer, 0, numRead);
}
}
/// <summary>
/// Returns string representation of message sent over stream.
/// </summary>
/// <param name="streamReader">StreamReader to receive message from.</param>
/// <param name="buffer">A character array to streamline bit shuffling.</param>
/// <param name="maximumBytes">Maximum number of bytes to receive.</param>
/// <returns>Any text read from the stream connection.</returns>
public async static Task<string> ReadStreamStringAsync(StreamReader streamReader, char[] buffer, int maximumBytes)
{
int bytesRead = await streamReader.ReadAsync(buffer, 0, maximumBytes);
return new string(buffer, 0, bytesRead);
}
public async Task<Dictionary<string, UInt16>> readFileAsync()
{
FileStream inFS = null;
try
{
inFS = new FileStream(inFileName, FileMode.Open, FileAccess.Read);
using (StreamReader txtReader = new StreamReader(inFS))
{
inBuffer = new char[txtReader.BaseStream.Length];
await txtReader.ReadAsync(inBuffer, 0, (int)inBuffer.Length);
}
foreach (char c in inBuffer)
{
/*if (Char.IsControl(c) || Char.IsHighSurrogate(c) || Char.IsLowSurrogate(c) ||
Char.IsSeparator(c) || Char.IsSurrogate(c))
{
//do nothig here
}
else
{
if (lettersDic.ContainsKey(c.ToString()))
lettersDic[c.ToString()]++;
else
lettersDic[c.ToString()] = 1;
}*/
switch (c)
{
case '\n':
case '\t':
case '\f':
case '\r':
case '\v':
case ' ':
break;
default:
if (lettersDic.ContainsKey(c.ToString()))
lettersDic[c.ToString()]++;
else
lettersDic[c.ToString()] = 1;
break;
}
}
}
finally
{
if (inFS != null)
inFS.Dispose();
}
string outputString = "";
foreach (string s in lettersDic.Keys)
{
outputString += "Key: " + s + "\tTimes: " + lettersDic[s] + "\n";
}
//using(new FileStream(inFileName, FileMode.Open, FileAccess.Read),
// new FileStream(outFilename, FileMode.Create, FileAccess.Write)
return lettersDic;
}
/// <summary>
/// Save an embedded resource file to the file system.
/// </summary>
/// <param name="resourceFileName">Identifier of the embedded resource.</param>
/// <param name="resourcePath">Full path to the embedded resource.</param>
/// <param name="filePath">File system location to save the file.</param>
private async void SaveResourceFile(string resourceFileName, string resourcePath, string filePath)
{
if (!File.Exists(filePath + "\\" + resourceFileName))
{
using (StreamReader resourceReader = new StreamReader(Assembly.GetAssembly(GetType()).GetManifestResourceStream(resourcePath + "." + resourceFileName)))
{
using (StreamWriter fileWriter = new StreamWriter(filePath + "\\" + resourceFileName))
{
char[] buffer = new char[Constants.SMALLBUFFERSIZE];
int bytesRead;
while ((bytesRead = await resourceReader.ReadAsync(buffer, 0, buffer.Length)) > 0)
await fileWriter.WriteAsync(buffer, 0, bytesRead);
}
}
}
}