Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Net / System / Net / Mail / SmtpTransport.cs / 1305376 / SmtpTransport.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Net.Mail { using System; using System.Collections; using System.Globalization; using System.IO; using System.Net; using System.Net.Sockets; using System.Text; using System.Net.Security; using System.Security.Cryptography.X509Certificates; using System.Net.Mime; using System.Security.Principal; using System.Security.Permissions; using System.Threading; using System.Diagnostics; internal enum SupportedAuth{ None = 0, Login = 1, #if !FEATURE_PAL NTLM = 2, GSSAPI = 4, WDigest = 8 #endif }; internal class SmtpPooledStream:PooledStream{ internal bool previouslyUsed; internal bool dsnEnabled; //delivery status notification internal ICredentialsByHost creds; internal SmtpPooledStream(ConnectionPool connectionPool, TimeSpan lifetime, bool checkLifetime) : base (connectionPool,lifetime,checkLifetime) { } // maximum line length in SMTP response is 76 so this is a bit more conservative const int safeBufferLength = 80; // Cleans up an open connection to an SMTP server by sending the QUIT // response, reading the server's response, and disposing the base stream protected override void Dispose(bool disposing) { if (Logging.On) { Logging.Enter(Logging.Web, "SmtpPooledStream::Dispose #" + ValidationHelper.HashString(this)); } if (disposing) { if (this.NetworkStream.Connected) { this.Write(SmtpCommands.Quit, 0, SmtpCommands.Quit.Length); this.Flush(); // read the response - this is a formality since the connection is shut down // immediately by the server so this data can safely be ignored but buffer // must be read to ensure a FIN is sent instead of a RST byte[] buffer = new byte[safeBufferLength]; int result = this.Read(buffer, 0, safeBufferLength); } } base.Dispose(disposing); if (Logging.On) { Logging.Exit(Logging.Web, "SmtpPooledStream::Dispose #" + ValidationHelper.HashString(this)); } } } internal class SmtpTransport { internal const int DefaultPort = 25; ISmtpAuthenticationModule[] authenticationModules; SmtpConnection connection; SmtpClient client; ICredentialsByHost credentials; int timeout = 100000; // seconds ArrayList failedRecipientExceptions = new ArrayList(); bool m_IdentityRequired; bool enableSsl = false; X509CertificateCollection clientCertificates = null; ServicePoint lastUsedServicePoint; internal SmtpTransport(SmtpClient client) : this(client, SmtpAuthenticationManager.GetModules()) { } internal SmtpTransport(SmtpClient client, ISmtpAuthenticationModule[] authenticationModules) { this.client = client; if (authenticationModules == null) { throw new ArgumentNullException("authenticationModules"); } this.authenticationModules = authenticationModules; } internal ICredentialsByHost Credentials { get { return credentials; } set { credentials = value; } } internal bool IdentityRequired { get { return m_IdentityRequired; } set { m_IdentityRequired = value; } } internal bool IsConnected { get { return connection != null && connection.IsConnected; } } internal int Timeout { get { return timeout; } set { if (value < 0) { throw new ArgumentOutOfRangeException("value"); } timeout = value; } } internal bool EnableSsl { get { return enableSsl; } set { #if !FEATURE_PAL enableSsl = value; #else throw new NotImplementedException("ROTORTODO"); #endif } } internal X509CertificateCollection ClientCertificates { get { if (clientCertificates == null) { clientCertificates = new X509CertificateCollection(); } return clientCertificates; } } // check to see if we're using a different servicepoint than the last // servicepoint used to get a connectionpool // // preconditions: servicePoint must have valid host and port (checked in SmtpClient) // // postconditions: if servicePoint is different than the last servicePoint used by this object, // the connection pool for the previous servicepoint will be cleaned up and servicePoint will be // cached to identify if it has changed in future uses of this SmtpTransport object private void UpdateServicePoint(ServicePoint servicePoint) { if (lastUsedServicePoint == null) { lastUsedServicePoint = servicePoint; } else if (lastUsedServicePoint.Host != servicePoint.Host || lastUsedServicePoint.Port != servicePoint.Port) { ConnectionPoolManager.CleanupConnectionPool(servicePoint, ""); lastUsedServicePoint = servicePoint; } } internal void GetConnection(ServicePoint servicePoint) { try { Debug.Assert(servicePoint != null, "no ServicePoint provided by SmtpClient"); // check to see if we have a different connection than last time UpdateServicePoint(servicePoint); connection = new SmtpConnection(this, client, credentials, authenticationModules); connection.Timeout = timeout; if(Logging.On)Logging.Associate(Logging.Web, this, connection); if (EnableSsl) { connection.EnableSsl = true; connection.ClientCertificates = ClientCertificates; } connection.GetConnection(servicePoint); } finally { } } internal IAsyncResult BeginGetConnection(ServicePoint servicePoint, ContextAwareResult outerResult, AsyncCallback callback, object state) { GlobalLog.Enter("SmtpTransport#" + ValidationHelper.HashString(this) + "::BeginConnect"); IAsyncResult result = null; try{ UpdateServicePoint(servicePoint); connection = new SmtpConnection(this, client, credentials, authenticationModules); connection.Timeout = timeout; if(Logging.On)Logging.Associate(Logging.Web, this, connection); if (EnableSsl) { connection.EnableSsl = true; connection.ClientCertificates = ClientCertificates; } result = connection.BeginGetConnection(servicePoint, outerResult, callback, state); } catch(Exception innerException){ throw new SmtpException(SR.GetString(SR.MailHostNotFound), innerException); } GlobalLog.Leave("SmtpTransport#" + ValidationHelper.HashString(this) + "::BeginConnect [....] Completion"); return result; } internal void EndGetConnection(IAsyncResult result) { GlobalLog.Enter("SmtpTransport#" + ValidationHelper.HashString(this) + "::EndGetConnection"); try { connection.EndGetConnection(result); } finally { GlobalLog.Leave("SmtpTransport#" + ValidationHelper.HashString(this) + "::EndConnect"); } } internal IAsyncResult BeginSendMail(MailAddress sender, MailAddressCollection recipients, string deliveryNotify, AsyncCallback callback, object state) { if (sender == null) { throw new ArgumentNullException("sender"); } if (recipients == null) { throw new ArgumentNullException("recipients"); } GlobalLog.Assert(recipients.Count > 0, "SmtpTransport::BeginSendMail()|recepients.Count <= 0"); SendMailAsyncResult result = new SendMailAsyncResult(connection, sender.SmtpAddress, recipients, connection.DSNEnabled?deliveryNotify:null, callback, state); result.Send(); return result; } internal void ReleaseConnection() { if(connection != null){ connection.ReleaseConnection(); } } internal void Abort() { if(connection != null){ connection.Abort(); } } internal MailWriter EndSendMail(IAsyncResult result) { try { return SendMailAsyncResult.End(result); } finally { } } internal MailWriter SendMail(MailAddress sender, MailAddressCollection recipients, string deliveryNotify, out SmtpFailedRecipientException exception) { if (sender == null) { throw new ArgumentNullException("sender"); } if (recipients == null) { throw new ArgumentNullException("recipients"); } GlobalLog.Assert(recipients.Count > 0, "SmtpTransport::SendMail()|recepients.Count <= 0"); MailCommand.Send(connection, SmtpCommands.Mail, sender.SmtpAddress); failedRecipientExceptions.Clear(); exception = null; string response; foreach (MailAddress address in recipients) { if (!RecipientCommand.Send(connection, connection.DSNEnabled?address.SmtpAddress + deliveryNotify:address.SmtpAddress, out response)) { failedRecipientExceptions.Add(new SmtpFailedRecipientException(connection.Reader.StatusCode, address.SmtpAddress, response)); } } if (failedRecipientExceptions.Count > 0) { if (failedRecipientExceptions.Count == 1) { exception = (SmtpFailedRecipientException) failedRecipientExceptions[0]; } else { exception = new SmtpFailedRecipientsException(failedRecipientExceptions, failedRecipientExceptions.Count == recipients.Count); } if (failedRecipientExceptions.Count == recipients.Count){ exception.fatal = true; throw exception; } } DataCommand.Send(connection); return new MailWriter(connection.GetClosableStream()); } internal void CloseIdleConnections(ServicePoint servicePoint) { ConnectionPoolManager.CleanupConnectionPool(servicePoint, ""); } } class SendMailAsyncResult : LazyAsyncResult { SmtpConnection connection; string from; string deliveryNotify; static AsyncCallback sendMailFromCompleted = new AsyncCallback(SendMailFromCompleted); static AsyncCallback sendToCompleted = new AsyncCallback(SendToCompleted); static AsyncCallback sendToCollectionCompleted = new AsyncCallback(SendToCollectionCompleted); static AsyncCallback sendDataCompleted = new AsyncCallback(SendDataCompleted); ArrayList failedRecipientExceptions = new ArrayList(); Stream stream; string to; MailAddressCollection toCollection; int toIndex; internal SendMailAsyncResult(SmtpConnection connection, string from, MailAddressCollection toCollection, string deliveryNotify, AsyncCallback callback, object state) : base(null, state, callback) { this.toCollection = toCollection; this.connection = connection; this.from = from; this.deliveryNotify = deliveryNotify; } internal void Send(){ SendMailFrom(); } internal static MailWriter End(IAsyncResult result) { SendMailAsyncResult thisPtr = (SendMailAsyncResult)result; object sendMailResult = thisPtr.InternalWaitForCompletion(); if (sendMailResult is Exception) throw (Exception)sendMailResult; return new MailWriter(thisPtr.stream); } void SendMailFrom() { IAsyncResult result = MailCommand.BeginSend(connection, SmtpCommands.Mail, from, sendMailFromCompleted, this); if (!result.CompletedSynchronously) { return; } MailCommand.EndSend(result); SendTo(); } static void SendMailFromCompleted(IAsyncResult result) { if (!result.CompletedSynchronously) { SendMailAsyncResult thisPtr = (SendMailAsyncResult)result.AsyncState; try { MailCommand.EndSend(result); thisPtr.SendTo(); } catch (Exception e) { thisPtr.InvokeCallback(e); } } } void SendTo() { GlobalLog.Enter("SendMailAsyncResult#" + ValidationHelper.HashString(this) + "::SendTo"); if (to != null) { GlobalLog.Print("SendMailAsyncResult#" + ValidationHelper.HashString(this) + "::SendTo - to string"); IAsyncResult result = RecipientCommand.BeginSend(connection, (deliveryNotify!=null)?to + deliveryNotify:to, sendToCompleted, this); if (!result.CompletedSynchronously) { return; } string response; if (!RecipientCommand.EndSend(result, out response)) { throw new SmtpFailedRecipientException(connection.Reader.StatusCode, to, response); } SendData(); } else { GlobalLog.Print("SendMailAsyncResult#" + ValidationHelper.HashString(this) + "::SendTo - to collection"); if (SendToCollection()) { SendData(); } } GlobalLog.Leave("SendMailAsyncResult#" + ValidationHelper.HashString(this) + "::SendTo"); } static void SendToCompleted(IAsyncResult result) { if (!result.CompletedSynchronously) { SendMailAsyncResult thisPtr = (SendMailAsyncResult)result.AsyncState; try { string response; if (RecipientCommand.EndSend(result, out response)) { thisPtr.SendData(); } else { thisPtr.InvokeCallback(new SmtpFailedRecipientException(thisPtr.connection.Reader.StatusCode, thisPtr.to, response)); } } catch (Exception e) { thisPtr.InvokeCallback(e); } } } bool SendToCollection() { while (toIndex < toCollection.Count) { MultiAsyncResult result = (MultiAsyncResult)RecipientCommand.BeginSend(connection, toCollection[toIndex++].SmtpAddress + deliveryNotify, sendToCollectionCompleted, this); if (!result.CompletedSynchronously) { return false; } string response; if (!RecipientCommand.EndSend(result, out response)){ failedRecipientExceptions.Add(new SmtpFailedRecipientException(connection.Reader.StatusCode, toCollection[toIndex - 1].SmtpAddress, response)); } } return true; } static void SendToCollectionCompleted(IAsyncResult result) { if (!result.CompletedSynchronously) { SendMailAsyncResult thisPtr = (SendMailAsyncResult)result.AsyncState; try { string response; if (!RecipientCommand.EndSend(result, out response)) { thisPtr.failedRecipientExceptions.Add(new SmtpFailedRecipientException(thisPtr.connection.Reader.StatusCode, thisPtr.toCollection[thisPtr.toIndex - 1].SmtpAddress, response)); if (thisPtr.failedRecipientExceptions.Count == thisPtr.toCollection.Count) { SmtpFailedRecipientException exception = null; if (thisPtr.toCollection.Count == 1) { exception = (SmtpFailedRecipientException)thisPtr.failedRecipientExceptions[0]; } else { exception = new SmtpFailedRecipientsException(thisPtr.failedRecipientExceptions, true); } exception.fatal = true; thisPtr.InvokeCallback(exception); return; } } if (thisPtr.SendToCollection()) { thisPtr.SendData(); } } catch (Exception e) { thisPtr.InvokeCallback(e); } } } void SendData() { IAsyncResult result = DataCommand.BeginSend(connection, sendDataCompleted, this); if (!result.CompletedSynchronously) { return; } DataCommand.EndSend(result); stream = connection.GetClosableStream(); if (failedRecipientExceptions.Count > 1) { InvokeCallback(new SmtpFailedRecipientsException(failedRecipientExceptions, failedRecipientExceptions.Count == toCollection.Count)); } else if (failedRecipientExceptions.Count == 1) { InvokeCallback(failedRecipientExceptions[0]); } else { InvokeCallback(); } } static void SendDataCompleted(IAsyncResult result) { if (!result.CompletedSynchronously) { SendMailAsyncResult thisPtr = (SendMailAsyncResult)result.AsyncState; try { DataCommand.EndSend(result); thisPtr.stream = thisPtr.connection.GetClosableStream(); if (thisPtr.failedRecipientExceptions.Count > 1) { thisPtr.InvokeCallback(new SmtpFailedRecipientsException(thisPtr.failedRecipientExceptions, thisPtr.failedRecipientExceptions.Count == thisPtr.toCollection.Count)); } else if (thisPtr.failedRecipientExceptions.Count == 1) { thisPtr.InvokeCallback(thisPtr.failedRecipientExceptions[0]); } else { thisPtr.InvokeCallback(); } } catch (Exception e) { thisPtr.InvokeCallback(e); } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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