Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Net / System / Net / Mail / SmtpClient.cs / 1 / SmtpClient.cs
namespace System.Net.Mail
{
using System;
using System.IO;
using System.Net;
using System.Collections;
using System.ComponentModel;
using System.Configuration;
using System.Net.Configuration;
using System.Threading;
using System.Security;
using System.Security.Permissions;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
using System.Net.NetworkInformation;
using System.Runtime.Versioning;
public delegate void SendCompletedEventHandler(object sender, AsyncCompletedEventArgs e);
public enum SmtpDeliveryMethod {
Network,
SpecifiedPickupDirectory,
#if !FEATURE_PAL
PickupDirectoryFromIis
#endif
}
public class SmtpClient {
string host;
int port;
bool inCall;
bool cancelled;
bool timedOut;
SmtpDeliveryMethod deliveryMethod = SmtpDeliveryMethod.Network;
string pickupDirectoryLocation = null;
SmtpTransport transport;
MailMessage message; //required to prevent premature finalization
MailWriter writer;
MailAddressCollection recipients;
SendOrPostCallback onSendCompletedDelegate;
Timer timer;
static MailSettingsSectionGroupInternal mailConfiguration;
ContextAwareResult operationCompletedResult = null;
AsyncOperation asyncOp = null;
static AsyncCallback _ContextSafeCompleteCallback = new AsyncCallback(ContextSafeCompleteCallback);
static int defaultPort = 25;
internal string localHostName;
public event SendCompletedEventHandler SendCompleted;
public SmtpClient(){
if(Logging.On)Logging.Enter(Logging.Web, "SmtpClient", ".ctor", "");
try {
Initialize();
} finally {
if(Logging.On)Logging.Exit(Logging.Web, "SmtpClient", ".ctor", this);
}
}
public SmtpClient(string host){
if(Logging.On)Logging.Enter(Logging.Web, "SmtpClient", ".ctor", "host="+host);
try {
this.host = host;
Initialize();
} finally {
if(Logging.On)Logging.Exit(Logging.Web, "SmtpClient", ".ctor", this);
}
}
//?? should port throw or just default on 0?
public SmtpClient(string host, int port) {
if(Logging.On)Logging.Enter(Logging.Web, "SmtpClient", ".ctor", "host="+host+", port="+port);
try {
if (port < 0){
throw new ArgumentOutOfRangeException("port");
}
this.host = host;
this.port = port;
Initialize();
} finally {
if(Logging.On)Logging.Exit(Logging.Web, "SmtpClient", ".ctor", this);
}
}
void Initialize(){
if (port == defaultPort || port == 0) {
new SmtpPermission(SmtpAccess.Connect).Demand();
}
else{
new SmtpPermission(SmtpAccess.ConnectToUnrestrictedPort).Demand();
}
transport = new SmtpTransport(this);
if(Logging.On)Logging.Associate(Logging.Web, this, transport);
onSendCompletedDelegate = new SendOrPostCallback (SendCompletedWaitCallback);
if (MailConfiguration.Smtp != null)
{
if (MailConfiguration.Smtp.Network != null)
{
if (host == null || host.Length == 0){
host = MailConfiguration.Smtp.Network.Host;
}
if (port == 0) {
port = MailConfiguration.Smtp.Network.Port;
}
transport.Credentials = MailConfiguration.Smtp.Network.Credential;
}
deliveryMethod = MailConfiguration.Smtp.DeliveryMethod;
if (MailConfiguration.Smtp.SpecifiedPickupDirectory != null)
pickupDirectoryLocation = MailConfiguration.Smtp.SpecifiedPickupDirectory.PickupDirectoryLocation;
}
if (host != null && host.Length != 0) {
host = host.Trim();
}
if (port == 0) {
port = defaultPort;
}
localHostName = IPGlobalProperties.InternalGetIPGlobalProperties().HostName;
}
public string Host {
get {
return host;
}
set {
if (InCall) {
throw new InvalidOperationException(SR.GetString(SR.SmtpInvalidOperationDuringSend));
}
if (value == null)
{
throw new ArgumentNullException("value");
}
if (value == String.Empty)
{
throw new ArgumentException(SR.GetString(SR.net_emptystringset), "value");
}
host = value.Trim();
}
}
public int Port {
get {
return port;
}
set {
if (InCall) {
throw new InvalidOperationException(SR.GetString(SR.SmtpInvalidOperationDuringSend));
}
if (value <= 0){
throw new ArgumentOutOfRangeException("value");
}
if (value != defaultPort) {
new SmtpPermission(SmtpAccess.ConnectToUnrestrictedPort).Demand();
}
port = value;
}
}
public bool UseDefaultCredentials {
get {
return (transport.Credentials is SystemNetworkCredential) ? true : false;
}
set {
if (InCall) {
throw new InvalidOperationException(SR.GetString(SR.SmtpInvalidOperationDuringSend));
}
transport.Credentials = value ? CredentialCache.DefaultNetworkCredentials : null;
}
}
public ICredentialsByHost Credentials{
get{
return transport.Credentials;
}
set{
if (InCall) {
throw new InvalidOperationException(SR.GetString(SR.SmtpInvalidOperationDuringSend));
}
transport.Credentials = value;
}
}
public int Timeout {
get {
return transport.Timeout;
}
set {
if (InCall) {
throw new InvalidOperationException(SR.GetString(SR.SmtpInvalidOperationDuringSend));
}
if (value < 0)
{
throw new ArgumentOutOfRangeException("value");
}
transport.Timeout = value;
}
}
public ServicePoint ServicePoint{
get{
CheckHostAndPort();
return ServicePointManager.FindServicePoint(host,port);
}
}
public SmtpDeliveryMethod DeliveryMethod {
get {
return deliveryMethod;
}
set {
deliveryMethod = value;
}
}
public string PickupDirectoryLocation {
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
get {
return pickupDirectoryLocation;
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
set {
pickupDirectoryLocation = value;
}
}
///
/// Set to true if we need SSL
///
public bool EnableSsl {
get {
return transport.EnableSsl;
}
set {
transport.EnableSsl = value;
}
}
///
/// Certificates used by the client for establishing an SSL connection with the server.
///
public X509CertificateCollection ClientCertificates {
get {
return transport.ClientCertificates;
}
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
internal MailWriter GetFileMailWriter(string pickupDirectory)
{
if(Logging.On) Logging.PrintInfo(Logging.Web, "SmtpClient.Send() pickupDirectory=" + pickupDirectory);
if (!Path.IsPathRooted(pickupDirectory))
throw new SmtpException(SR.GetString(SR.SmtpNeedAbsolutePickupDirectory));
string filename;
string pathAndFilename;
while (true) {
filename = Guid.NewGuid().ToString() + ".eml";
pathAndFilename = Path.Combine(pickupDirectory, filename);
if (!File.Exists(pathAndFilename))
break;
}
FileStream fileStream = new FileStream(pathAndFilename, FileMode.CreateNew);
return new MailWriter(fileStream);
}
protected void OnSendCompleted(AsyncCompletedEventArgs e)
{
if (SendCompleted != null){
SendCompleted (this,e);
}
}
void SendCompletedWaitCallback (object operationState){
OnSendCompleted((AsyncCompletedEventArgs)operationState);
}
public void Send(string from, string recipients, string subject, string body) {
//validation happends in MailMessage constructor
MailMessage mailMessage = new MailMessage(from, recipients, subject, body);
Send(mailMessage);
}
[ResourceExposure(ResourceScope.None)]
[ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
public void Send(MailMessage message) {
if(Logging.On) Logging.Enter(Logging.Web, this, "Send", message);
try {
if(Logging.On) Logging.PrintInfo(Logging.Web, this, "Send", "DeliveryMethod=" + DeliveryMethod.ToString());
if(Logging.On) Logging.Associate(Logging.Web, this, message);
SmtpFailedRecipientException recipientException = null;
if (InCall) {
throw new InvalidOperationException(SR.GetString(SR.net_inasync));
}
if (message == null) {
throw new ArgumentNullException("message");
}
if (DeliveryMethod == SmtpDeliveryMethod.Network)
CheckHostAndPort();
MailAddressCollection recipients = new MailAddressCollection();
if (message.From == null) {
throw new InvalidOperationException(SR.GetString(SR.SmtpFromRequired));
}
if (message.To != null) {
foreach(MailAddress address in message.To) {
recipients.Add(address);
}
}
if (message.Bcc != null) {
foreach(MailAddress address in message.Bcc) {
recipients.Add(address);
}
}
if (message.CC != null) {
foreach(MailAddress address in message.CC) {
recipients.Add(address);
}
}
if (recipients.Count == 0) {
throw new InvalidOperationException(SR.GetString(SR.SmtpRecipientRequired));
}
transport.IdentityRequired = false; // everything completes on the same thread.
try {
InCall = true;
timedOut = false;
timer = new Timer(new TimerCallback(this.TimeOutCallback), null, Timeout, Timeout);
MailWriter writer;
switch (DeliveryMethod) {
case SmtpDeliveryMethod.SpecifiedPickupDirectory:
if (EnableSsl)
throw new SmtpException(SR.GetString(SR.SmtpPickupDirectoryDoesnotSupportSsl));
writer = GetFileMailWriter(PickupDirectoryLocation);
break;
#if !FEATURE_PAL
case SmtpDeliveryMethod.PickupDirectoryFromIis:
if (EnableSsl)
throw new SmtpException(SR.GetString(SR.SmtpPickupDirectoryDoesnotSupportSsl));
writer = GetFileMailWriter(IisPickupDirectory.GetPickupDirectory());
break;
#endif // !FEATURE_PAL
case SmtpDeliveryMethod.Network:
default:
GetConnection();
writer = transport.SendMail(message.Sender != null ? message.Sender : message.From, recipients, message.BuildDeliveryStatusNotificationString(), out recipientException);
break;
}
this.message = message;
message.Send(writer, DeliveryMethod != SmtpDeliveryMethod.Network);
writer.Close();
transport.ReleaseConnection();
//throw if we couldn't send to any of the recipients
if (DeliveryMethod == SmtpDeliveryMethod.Network)
if (recipientException != null)
throw recipientException;
}
catch (Exception e) {
if(Logging.On)Logging.Exception(Logging.Web, this, "Send", e);
if (e is SmtpFailedRecipientException && !((SmtpFailedRecipientException)e).fatal){
throw;
}
Abort();
if (timedOut) {
throw new SmtpException(SR.GetString(SR.net_timeout));
}
if (e is SecurityException ||
e is AuthenticationException ||
e is SmtpException)
{
throw;
}
throw new SmtpException(SR.GetString(SR.SmtpSendMailFailure),e);
}
finally {
InCall = false;
if(timer != null){
timer.Dispose();
}
}
} finally {
if(Logging.On)Logging.Exit(Logging.Web, this, "Send", null);
}
}
[HostProtection(ExternalThreading=true)]
public void SendAsync(string from, string recipients,string subject, string body, object userToken) {
SendAsync(new MailMessage(from,recipients,subject,body),userToken);
}
[HostProtection(ExternalThreading=true)]
[ResourceExposure(ResourceScope.None)]
[ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
public void SendAsync(MailMessage message, object userToken) {
if(Logging.On) Logging.Enter(Logging.Web, this, "SendAsync", "DeliveryMethod=" + DeliveryMethod.ToString());
GlobalLog.Enter("SmtpClient#" + ValidationHelper.HashString(this) + "::SendAsync Transport#"+ValidationHelper.HashString(transport));
try {
if (InCall) {
throw new InvalidOperationException(SR.GetString(SR.net_inasync));
}
if (message == null) {
throw new ArgumentNullException("message");
}
if (DeliveryMethod == SmtpDeliveryMethod.Network)
CheckHostAndPort();
recipients = new MailAddressCollection();
if (message.From == null) {
throw new InvalidOperationException(SR.GetString(SR.SmtpFromRequired));
}
if (message.To != null) {
foreach(MailAddress address in message.To) {
recipients.Add(address);
}
}
if (message.Bcc != null) {
foreach(MailAddress address in message.Bcc) {
recipients.Add(address);
}
}
if (message.CC != null) {
foreach(MailAddress address in message.CC) {
recipients.Add(address);
}
}
if (recipients.Count == 0) {
throw new InvalidOperationException(SR.GetString(SR.SmtpRecipientRequired));
}
try {
InCall = true;
cancelled = false;
this.message = message;
#if !FEATURE_PAL
CredentialCache cache;
// Skip token capturing if no credentials are used or they don't include a default one.
// Also do capture the token if ICredential is not of CredentialCache type so we don't know what the exact credential response will be.
transport.IdentityRequired = Credentials != null && ComNetOS.IsWinNt && (Credentials is SystemNetworkCredential || (cache = Credentials as CredentialCache) == null || cache.IsDefaultInCache);
#endif // !FEATURE_PAL
asyncOp = AsyncOperationManager.CreateOperation(userToken);
switch (DeliveryMethod) {
case SmtpDeliveryMethod.SpecifiedPickupDirectory:
{
if (EnableSsl)
throw new SmtpException(SR.GetString(SR.SmtpPickupDirectoryDoesnotSupportSsl));
writer = GetFileMailWriter(PickupDirectoryLocation);
message.Send(writer, DeliveryMethod != SmtpDeliveryMethod.Network);
if (writer != null)
writer.Close();
transport.ReleaseConnection();
AsyncCompletedEventArgs eventArgs = new AsyncCompletedEventArgs(null, false, asyncOp.UserSuppliedState);
InCall = false;
asyncOp.PostOperationCompleted(onSendCompletedDelegate, eventArgs);
break;
}
#if !FEATURE_PAL
case SmtpDeliveryMethod.PickupDirectoryFromIis:
{
if (EnableSsl)
throw new SmtpException(SR.GetString(SR.SmtpPickupDirectoryDoesnotSupportSsl));
writer = GetFileMailWriter(IisPickupDirectory.GetPickupDirectory());
message.Send(writer, DeliveryMethod != SmtpDeliveryMethod.Network);
if (writer != null)
writer.Close();
transport.ReleaseConnection();
AsyncCompletedEventArgs eventArgs = new AsyncCompletedEventArgs(null, false, asyncOp.UserSuppliedState);
InCall = false;
asyncOp.PostOperationCompleted(onSendCompletedDelegate, eventArgs);
break;
}
#endif // !FEATURE_PAL
case SmtpDeliveryMethod.Network:
default:
operationCompletedResult = new ContextAwareResult(transport.IdentityRequired, true, null, this, _ContextSafeCompleteCallback);
lock (operationCompletedResult.StartPostingAsyncOp())
{
GlobalLog.Print("SmtpClient#" + ValidationHelper.HashString(this) + "::SendAsync calling BeginConnect. Transport#"+ValidationHelper.HashString(transport));
transport.BeginGetConnection(host, port, operationCompletedResult, ConnectCallback, operationCompletedResult);
operationCompletedResult.FinishPostingAsyncOp();
}
break;
}
}
catch (Exception e) {
InCall = false;
if(Logging.On)Logging.Exception(Logging.Web, this, "Send", e);
if (e is SmtpFailedRecipientException && !((SmtpFailedRecipientException)e).fatal){
throw;
}
Abort();
if (timedOut) {
throw new SmtpException(SR.GetString(SR.net_timeout));
}
if (e is SecurityException ||
e is AuthenticationException ||
e is SmtpException)
{
throw;
}
throw new SmtpException(SR.GetString(SR.SmtpSendMailFailure),e);
}
} finally {
if(Logging.On)Logging.Exit(Logging.Web, this, "SendAsync", null);
GlobalLog.Leave("SmtpClient#" + ValidationHelper.HashString(this) + "::SendAsync");
}
}
public void SendAsyncCancel() {
if(Logging.On)Logging.Enter(Logging.Web, this, "SendAsyncCancel", null);
GlobalLog.Enter("SmtpClient#" + ValidationHelper.HashString(this) + "::SendAsyncCancel");
try {
if (!InCall || cancelled) {
return;
}
cancelled = true;
Abort();
} finally {
if(Logging.On)Logging.Exit(Logging.Web, this, "SendAsyncCancel", null);
GlobalLog.Leave("SmtpClient#" + ValidationHelper.HashString(this) + "::SendAsyncCancel");
}
}
//*********************************
// private methods
//********************************
internal bool InCall {
get {
return inCall;
}
set {
inCall = value;
}
}
internal static MailSettingsSectionGroupInternal MailConfiguration {
get{
if (mailConfiguration == null) {
mailConfiguration = MailSettingsSectionGroupInternal.GetSection();
}
return mailConfiguration;
}
}
void CheckHostAndPort(){
if (host == null || host.Length == 0){
throw new InvalidOperationException(SR.GetString(SR.UnspecifiedHost));
}
if (port == 0) {
throw new InvalidOperationException(SR.GetString(SR.InvalidPort));
}
}
void TimeOutCallback(object state) {
if (!timedOut) {
timedOut = true;
Abort();
}
}
void Complete(Exception exception, IAsyncResult result) {
ContextAwareResult operationCompletedResult = (ContextAwareResult) result.AsyncState;
GlobalLog.Enter("SmtpClient#" + ValidationHelper.HashString(this) + "::Complete");
try {
if (cancelled) {
//any exceptions were probably caused by cancellation, clear it.
exception = null;
Abort();
}
// A failed recipient exception is benign
else if (exception != null && (!(exception is SmtpFailedRecipientException) || ((SmtpFailedRecipientException)exception).fatal))
{
GlobalLog.Print("SmtpClient#" + ValidationHelper.HashString(this) + "::Complete Exception: "+exception.ToString());
Abort();
if (!(exception is SmtpException)){
exception = new SmtpException(SR.GetString(SR.SmtpSendMailFailure),exception);
}
}
else{
if (writer != null){
writer.Close();
}
transport.ReleaseConnection();
}
}
finally {
operationCompletedResult.InvokeCallback(exception);
}
GlobalLog.Leave("SmtpClient#" + ValidationHelper.HashString(this) + "::Complete");
}
static void ContextSafeCompleteCallback(IAsyncResult ar)
{
ContextAwareResult result = (ContextAwareResult) ar;
SmtpClient client = (SmtpClient)ar.AsyncState;
Exception exception = result.Result as Exception;
AsyncOperation asyncOp = client.asyncOp;
AsyncCompletedEventArgs eventArgs = new AsyncCompletedEventArgs(exception, client.cancelled, asyncOp.UserSuppliedState);
client.InCall = false;
asyncOp.PostOperationCompleted(client.onSendCompletedDelegate, eventArgs);
}
/*
void DisconnectCallback(IAsyncResult result) {
SmtpClient client = (SmtpClient)result.AsyncState;
try {
client.transport.EndDisconnect(result);
}
catch (Exception e) {
Complete(e);
return;
}
Complete(null);
}
*/
void SendMessageCallback(IAsyncResult result) {
GlobalLog.Enter("SmtpClient#" + ValidationHelper.HashString(this) + "::SendMessageCallback");
try {
message.EndSend(result);
Complete(null, result);
}
catch (Exception e) {
Complete(e, result);
}
GlobalLog.Leave("SmtpClient#" + ValidationHelper.HashString(this) + "::SendMessageCallback");
}
void SendMailCallback(IAsyncResult result) {
GlobalLog.Enter("SmtpClient#" + ValidationHelper.HashString(this) + "::SendMailCallback");
try {
writer = transport.EndSendMail(result);
}
catch (Exception e)
{
// Note the difference between the singular and plural FailedRecipient exceptions.
// Only fail immediately if we couldn't send to any recipients.
if (!(e is SmtpFailedRecipientException) || ((SmtpFailedRecipientException)e).fatal)
{
Complete(e, result);
GlobalLog.Leave("SmtpClient#" + ValidationHelper.HashString(this) + "::SendMailCallback");
return;
}
}
catch
{
// Note the difference between the singular and plural FailedRecipient exceptions.
// Only fail immediately if we couldn't send to any recipients.
Complete(new Exception(SR.GetString(SR.net_nonClsCompliantException)), result);
GlobalLog.Leave("SmtpClient#" + ValidationHelper.HashString(this) + "::SendMailCallback");
return;
}
try {
if (cancelled) {
Complete(null, result);
}
else{
message.BeginSend(writer, DeliveryMethod != SmtpDeliveryMethod.Network, new AsyncCallback(SendMessageCallback), result.AsyncState);
}
}
catch (Exception e) {
Complete(e, result);
}
GlobalLog.Leave("SmtpClient#" + ValidationHelper.HashString(this) + "::SendMailCallback");
}
void ConnectCallback(IAsyncResult result) {
GlobalLog.Enter("SmtpClient#" + ValidationHelper.HashString(this) + "::ConnectCallback");
try {
transport.EndGetConnection(result);
if (cancelled) {
Complete(null,result);
}
else{
transport.BeginSendMail(message.Sender != null ? message.Sender : message.From, recipients, message.BuildDeliveryStatusNotificationString(), new AsyncCallback(SendMailCallback), result.AsyncState);
}
}
catch (Exception e) {
Complete(e, result);
}
GlobalLog.Leave("SmtpClient#" + ValidationHelper.HashString(this) + "::ConnectCallback");
}
void GetConnection() {
if (!transport.IsConnected) {
transport.GetConnection(host, port);
}
}
void Abort() {
try{
transport.Abort();
}
catch{
}
}
}
}
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