//------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // //------------------------------------------------------------------------------ namespace System.Web.Management { using System.Configuration.Provider; using System.Collections; using System.Collections.Specialized; using System.Configuration; using System.Globalization; using System.Data; using System.Data.SqlClient; using System.Security.Permissions; using System.Security.Principal; using System.Text; using System.Threading; using System.Web.DataAccess; using System.Web.Util; //////////// // Events //////////// [PermissionSet(SecurityAction.InheritanceDemand, Unrestricted = true)] public class SqlWebEventProvider : BufferedWebEventProvider, IInternalWebEventProvider { const int SQL_MAX_NTEXT_SIZE = 1073741823; const int NO_LIMIT = -1; const string SP_LOG_EVENT = "dbo.aspnet_WebEvent_LogEvent"; string _sqlConnectionString; int _maxEventDetailsLength = NO_LIMIT; int _commandTimeout = -1; int _SchemaVersionCheck; int _connectionCount = 0; DateTime _retryDate = DateTime.MinValue; // Won't try sending unless DateTime.UtcNow is > _retryDate protected internal SqlWebEventProvider() { } public override void Initialize(string name, NameValueCollection config) { Debug.Trace("SqlWebEventProvider", "Initializing: name=" + name); _SchemaVersionCheck = 0; string temp = null; ProviderUtil.GetAndRemoveStringAttribute(config, "connectionStringName", name, ref temp); ProviderUtil.GetAndRemoveStringAttribute(config, "connectionString", name, ref _sqlConnectionString); if (!String.IsNullOrEmpty(temp)) { if (!String.IsNullOrEmpty(_sqlConnectionString)) { throw new ConfigurationErrorsException(SR.GetString(SR.Only_one_connection_string_allowed)); } _sqlConnectionString = SqlConnectionHelper.GetConnectionString(temp, true, true); if (_sqlConnectionString == null || _sqlConnectionString.Length < 1) { throw new ConfigurationErrorsException(SR.GetString(SR.Connection_string_not_found, temp)); } } else { // If a connection string is specified explicitly, verify that its not using integrated security SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder(_sqlConnectionString); if (builder.IntegratedSecurity) { throw new ConfigurationErrorsException(SR.GetString(SR.Cannot_use_integrated_security)); } } if (String.IsNullOrEmpty(_sqlConnectionString)) { throw new ConfigurationErrorsException(SR.GetString(SR.Must_specify_connection_string_or_name, temp)); } ProviderUtil.GetAndRemovePositiveOrInfiniteAttribute(config, "maxEventDetailsLength", name, ref _maxEventDetailsLength); if (_maxEventDetailsLength == ProviderUtil.Infinite) { _maxEventDetailsLength = NO_LIMIT; } else if (_maxEventDetailsLength > SQL_MAX_NTEXT_SIZE) { throw new ConfigurationErrorsException(SR.GetString(SR.Invalid_max_event_details_length, name, _maxEventDetailsLength.ToString(CultureInfo.CurrentCulture))); } ProviderUtil.GetAndRemovePositiveAttribute(config, "commandTimeout", name, ref _commandTimeout); base.Initialize(name, config); } private void CheckSchemaVersion(SqlConnection connection) { string[] features = { "Health Monitoring" }; string version = "1"; SecUtility.CheckSchemaVersion( this, connection, features, version, ref _SchemaVersionCheck ); } public override void ProcessEventFlush(WebEventBufferFlushInfo flushInfo) { Debug.Trace("SqlWebEventProvider", "EventBufferFlush called: " + "NotificationType=" + flushInfo.NotificationType + ", NotificationSequence=" + flushInfo.NotificationSequence + ", Events.Count=" + flushInfo.Events.Count); WriteToSQL(flushInfo.Events, flushInfo.EventsDiscardedSinceLastNotification, flushInfo.LastNotificationUtc); } void PrepareParams(SqlCommand sqlCommand) { sqlCommand.Parameters.Add(new SqlParameter("@EventId", SqlDbType.Char, 32)); sqlCommand.Parameters.Add(new SqlParameter("@EventTimeUtc", SqlDbType.DateTime)); sqlCommand.Parameters.Add(new SqlParameter("@EventTime", SqlDbType.DateTime)); sqlCommand.Parameters.Add(new SqlParameter("@EventType", SqlDbType.NVarChar, 256)); sqlCommand.Parameters.Add(new SqlParameter("@EventSequence", SqlDbType.Decimal)); sqlCommand.Parameters.Add(new SqlParameter("@EventOccurrence", SqlDbType.Decimal)); sqlCommand.Parameters.Add(new SqlParameter("@EventCode", SqlDbType.Int)); sqlCommand.Parameters.Add(new SqlParameter("@EventDetailCode", SqlDbType.Int)); sqlCommand.Parameters.Add(new SqlParameter("@Message", SqlDbType.NVarChar, 1024)); sqlCommand.Parameters.Add(new SqlParameter("@ApplicationPath", SqlDbType.NVarChar, 256)); sqlCommand.Parameters.Add(new SqlParameter("@ApplicationVirtualPath", SqlDbType.NVarChar, 256)); sqlCommand.Parameters.Add(new SqlParameter("@MachineName", SqlDbType.NVarChar, 256)); sqlCommand.Parameters.Add(new SqlParameter("@RequestUrl", SqlDbType.NVarChar, 1024)); sqlCommand.Parameters.Add(new SqlParameter("@ExceptionType", SqlDbType.NVarChar, 256)); sqlCommand.Parameters.Add(new SqlParameter("@Details", SqlDbType.NText)); } void FillParams(SqlCommand sqlCommand, WebBaseEvent eventRaised) { Exception exception = null; WebRequestInformation reqInfo = null; string details = null; WebApplicationInformation appInfo = WebBaseEvent.ApplicationInformation; int n = 0; sqlCommand.Parameters[n++].Value = eventRaised.EventID.ToString("N", CultureInfo.InstalledUICulture); // @EventId sqlCommand.Parameters[n++].Value = eventRaised.EventTimeUtc; // @EventTimeUtc sqlCommand.Parameters[n++].Value = eventRaised.EventTime; // @EventTime sqlCommand.Parameters[n++].Value = eventRaised.GetType().ToString(); // @EventType sqlCommand.Parameters[n++].Value = eventRaised.EventSequence; // @EventSequence sqlCommand.Parameters[n++].Value = eventRaised.EventOccurrence; // @EventOccurrence sqlCommand.Parameters[n++].Value = eventRaised.EventCode; // @EventCode sqlCommand.Parameters[n++].Value = eventRaised.EventDetailCode; // @EventDetailCode sqlCommand.Parameters[n++].Value = eventRaised.Message; // @Message sqlCommand.Parameters[n++].Value = appInfo.ApplicationPath; // @ApplicationPath sqlCommand.Parameters[n++].Value = appInfo.ApplicationVirtualPath; // @ApplicationVirtualPath sqlCommand.Parameters[n++].Value = appInfo.MachineName; // @MachineName // // @RequestUrl if (eventRaised is WebRequestEvent) { reqInfo = ((WebRequestEvent)eventRaised).RequestInformation; } else if (eventRaised is WebRequestErrorEvent) { reqInfo = ((WebRequestErrorEvent)eventRaised).RequestInformation; } else if (eventRaised is WebErrorEvent) { reqInfo = ((WebErrorEvent)eventRaised).RequestInformation; } else if (eventRaised is WebAuditEvent) { reqInfo = ((WebAuditEvent)eventRaised).RequestInformation; } sqlCommand.Parameters[n++].Value = (reqInfo != null) ? reqInfo.RequestUrl : Convert.DBNull; // @ExceptionType if (eventRaised is WebBaseErrorEvent) { exception = ((WebBaseErrorEvent)eventRaised).ErrorException; } sqlCommand.Parameters[n++].Value = (exception != null) ? exception.GetType().ToString() : Convert.DBNull; // @Details details = eventRaised.ToString(); if (_maxEventDetailsLength != NO_LIMIT && details.Length > _maxEventDetailsLength) { details = details.Substring(0, _maxEventDetailsLength); } sqlCommand.Parameters[n++].Value = details; } [PermissionSet(SecurityAction.InheritanceDemand, Unrestricted = true)] [SqlClientPermission(SecurityAction.Assert, Unrestricted = true)] [PermissionSet(SecurityAction.Assert, Unrestricted = true)] void WriteToSQL(WebBaseEventCollection events, int eventsDiscardedByBuffer, DateTime lastNotificationUtc) { // We don't want to send any more events until we've waited until the _retryDate (which defaults to minValue) if (_retryDate > DateTime.UtcNow) { return; } try { SqlConnectionHolder sqlConnHolder = SqlConnectionHelper.GetConnection(_sqlConnectionString, true); SqlCommand sqlCommand = new SqlCommand(SP_LOG_EVENT); CheckSchemaVersion(sqlConnHolder.Connection); sqlCommand.CommandType = CommandType.StoredProcedure; sqlCommand.Connection = sqlConnHolder.Connection; if (_commandTimeout > -1) { sqlCommand.CommandTimeout = _commandTimeout; } PrepareParams(sqlCommand); try { sqlConnHolder.Open(null, true); Interlocked.Increment(ref _connectionCount); if (eventsDiscardedByBuffer != 0) { WebBaseEvent infoEvent = new WebBaseEvent( SR.GetString(SR.Sql_webevent_provider_events_dropped, eventsDiscardedByBuffer.ToString(CultureInfo.InstalledUICulture), lastNotificationUtc.ToString("r", CultureInfo.InstalledUICulture)), null, WebEventCodes.WebEventProviderInformation, WebEventCodes.SqlProviderEventsDropped); FillParams(sqlCommand, infoEvent); sqlCommand.ExecuteNonQuery(); } foreach (WebBaseEvent eventRaised in events) { FillParams(sqlCommand, eventRaised); sqlCommand.ExecuteNonQuery(); } } #if DBG catch (Exception e) { Debug.Trace("SqlWebEventProvider", "ExecuteNonQuery failed: " + e); throw; } #endif finally { sqlConnHolder.Close(); Interlocked.Decrement(ref _connectionCount); } #if (!DBG) try { #endif EventProcessingComplete(events); #if (!DBG) } catch { // Ignore all errors. } #endif } catch { // For any failure, we will wait at least 30 seconds or _commandTimeout before trying again double timeout = 30; if (_commandTimeout > -1) { timeout = (double)_commandTimeout; } _retryDate = DateTime.UtcNow.AddSeconds(timeout); throw; } } public override void ProcessEvent(WebBaseEvent eventRaised) { if (UseBuffering) { base.ProcessEvent(eventRaised); } else { Debug.Trace("SqlWebEventProvider", "Writing event to SQL: event=" + eventRaised.GetType().Name); WriteToSQL(new WebBaseEventCollection(eventRaised), 0, new DateTime(0)); } } protected virtual void EventProcessingComplete(WebBaseEventCollection raisedEvents) { } public override void Shutdown() { try { Flush(); } finally { base.Shutdown(); } // VSWhidbey 531556: Need to wait until all connections are gone before returning here // Sleep for 2x the command timeout in 1 sec intervals then give up, default timeout is 30 sec if (_connectionCount > 0) { int sleepAttempts = _commandTimeout*2; if (sleepAttempts <= 0) { sleepAttempts = 60; } // Check every second while (_connectionCount > 0 && sleepAttempts > 0) { --sleepAttempts; Thread.Sleep(1000); } } } } }