EventlogProvider.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Management / EventlogProvider.cs / 1 / EventlogProvider.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.Management { 
    using System.Configuration; 
    using System.Configuration.Provider;
    using System.Collections.Specialized; 
    using System.Security.Principal;
    using System.Web.Util;
    using System.Globalization;
    using System.Collections; 
    using System.Web.UI;
    using System.Security.Permissions; 
 
    ////////////
    // Events 
    ////////////

    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    public sealed class EventLogWebEventProvider : WebEventProvider, IInternalWebEventProvider { 

        const int    EventLogParameterMaxLength = 32 * 1024 - 2; 
        const string _truncateWarning = "..."; 
        int          _maxTruncatedParamLen;
 
        internal EventLogWebEventProvider() { }

        public override void Initialize(string name, NameValueCollection config)
        { 
            Debug.Trace("WebEventLogEventProvider", "Initializing: name=" + name);
 
            _maxTruncatedParamLen = EventLogParameterMaxLength - _truncateWarning.Length; 

            base.Initialize(name, config); 

            ProviderUtil.CheckUnrecognizedAttributes(config, name);
        }
 
        void AddBasicDataFields(ArrayList dataFields, WebBaseEvent eventRaised) {
            WebApplicationInformation       appInfo = WebBaseEvent.ApplicationInformation; 
 
            // Data contained in WebBaseEvent
            dataFields.Add(eventRaised.EventCode.ToString(CultureInfo.InstalledUICulture)); 
            dataFields.Add(eventRaised.Message);
            dataFields.Add(eventRaised.EventTime.ToString());
            dataFields.Add(eventRaised.EventTimeUtc.ToString());
            dataFields.Add(eventRaised.EventID.ToString("N", CultureInfo.InstalledUICulture)); 
            dataFields.Add(eventRaised.EventSequence.ToString(CultureInfo.InstalledUICulture));
            dataFields.Add(eventRaised.EventOccurrence.ToString(CultureInfo.InstalledUICulture)); 
            dataFields.Add(eventRaised.EventDetailCode.ToString(CultureInfo.InstalledUICulture)); 

            dataFields.Add(appInfo.ApplicationDomain); 
            dataFields.Add(appInfo.TrustLevel);
            dataFields.Add(appInfo.ApplicationVirtualPath);
            dataFields.Add(appInfo.ApplicationPath);
            dataFields.Add(appInfo.MachineName); 

            if (eventRaised.IsSystemEvent) { 
                dataFields.Add(null);   // custom event details 
            }
            else { 
                WebEventFormatter   formatter = new WebEventFormatter();
                eventRaised.FormatCustomEventDetails(formatter);
                dataFields.Add(formatter.ToString());
            } 
        }
 
        void AddWebProcessInformationDataFields(ArrayList dataFields, WebProcessInformation     processEventInfo) { 
            dataFields.Add(processEventInfo.ProcessID.ToString(CultureInfo.InstalledUICulture));
            dataFields.Add(processEventInfo.ProcessName); 
            dataFields.Add(processEventInfo.AccountName);
        }

        void AddWebRequestInformationDataFields(ArrayList dataFields, WebRequestInformation reqInfo) { 
            string      user;
            string      authType; 
            bool        authed; 
            IPrincipal  iprincipal = reqInfo.Principal;
 
            if (iprincipal == null) {
                user = null;
                authed = false;
                authType = null; 
            }
            else { 
                IIdentity    id = iprincipal.Identity; 

                user = id.Name; 
                authed = id.IsAuthenticated;
                authType = id.AuthenticationType;
            }
 
            dataFields.Add(reqInfo.RequestUrl);
            dataFields.Add(reqInfo.RequestPath); 
            dataFields.Add(reqInfo.UserHostAddress); 
            dataFields.Add(user);
            dataFields.Add(authed.ToString()); 
            dataFields.Add(authType);
            dataFields.Add(reqInfo.ThreadAccountName);
        }
 
        void AddWebProcessStatisticsDataFields(ArrayList dataFields, WebProcessStatistics procStats) {
            dataFields.Add(procStats.ProcessStartTime.ToString(CultureInfo.InstalledUICulture)); 
            dataFields.Add(procStats.ThreadCount.ToString(CultureInfo.InstalledUICulture)); 
            dataFields.Add(procStats.WorkingSet.ToString(CultureInfo.InstalledUICulture));
            dataFields.Add(procStats.PeakWorkingSet.ToString(CultureInfo.InstalledUICulture)); 
            dataFields.Add(procStats.ManagedHeapSize.ToString(CultureInfo.InstalledUICulture));
            dataFields.Add(procStats.AppDomainCount.ToString(CultureInfo.InstalledUICulture));
            dataFields.Add(procStats.RequestsExecuting.ToString(CultureInfo.InstalledUICulture));
            dataFields.Add(procStats.RequestsQueued.ToString(CultureInfo.InstalledUICulture)); 
            dataFields.Add(procStats.RequestsRejected.ToString(CultureInfo.InstalledUICulture));
        } 
 
        void AddExceptionDataFields(ArrayList dataFields, Exception exception) {
            if (exception == null) { 
                dataFields.Add(null);
                dataFields.Add(null);
            }
            else { 
                dataFields.Add(exception.GetType().Name);
                dataFields.Add(exception.Message); 
            } 
        }
 
        void AddWebThreadInformationDataFields(ArrayList dataFields, WebThreadInformation threadInfo) {
            dataFields.Add(threadInfo.ThreadID.ToString(CultureInfo.InstalledUICulture));
            dataFields.Add(threadInfo.ThreadAccountName);
            dataFields.Add(threadInfo.IsImpersonating.ToString(CultureInfo.InstalledUICulture)); 
            dataFields.Add(threadInfo.StackTrace);
        } 
 
        void AddViewStateExceptionDataFields(ArrayList dataFields, ViewStateException vse) {
            dataFields.Add(SR.GetString(vse.ShortMessage)); 
            dataFields.Add(vse.RemoteAddress);
            dataFields.Add(vse.RemotePort);
            dataFields.Add(vse.UserAgent);
            dataFields.Add(vse.PersistedState); 
            dataFields.Add(vse.Referer);
            dataFields.Add(vse.Path); 
        } 

        public override void ProcessEvent(WebBaseEvent eventRaised) 
        {
            Debug.Trace("EventLogWebEventProvider", "ProcessEvent: event=" + eventRaised.GetType().Name);

            int             hr; 
            ArrayList       dataFields = new ArrayList(35);
            WebEventType    eventType = WebBaseEvent.WebEventTypeFromWebEvent(eventRaised); 
 
            // !!! IMPORTANT note:
            // The order of fields added to dataFields MUST match that of the fields defined in the events 
            // in msg.mc

            AddBasicDataFields(dataFields, eventRaised);
 
            if (eventRaised is WebManagementEvent) {
                AddWebProcessInformationDataFields(dataFields, ((WebManagementEvent)eventRaised).ProcessInformation); 
            } 

            if (eventRaised is WebHeartbeatEvent) { 
                AddWebProcessStatisticsDataFields(dataFields, ((WebHeartbeatEvent)eventRaised).ProcessStatistics);
            }

            if (eventRaised is WebRequestEvent) { 
                AddWebRequestInformationDataFields(dataFields, ((WebRequestEvent)eventRaised).RequestInformation);
            } 
 
            if (eventRaised is WebBaseErrorEvent) {
                AddExceptionDataFields(dataFields, ((WebBaseErrorEvent)eventRaised).ErrorException); 
            }

            if (eventRaised is WebAuditEvent) {
                AddWebRequestInformationDataFields(dataFields, ((WebAuditEvent)eventRaised).RequestInformation); 
            }
 
            if (eventRaised is WebRequestErrorEvent) { 
                AddWebRequestInformationDataFields(dataFields, ((WebRequestErrorEvent)eventRaised).RequestInformation);
                AddWebThreadInformationDataFields(dataFields, ((WebRequestErrorEvent)eventRaised).ThreadInformation); 
            }

            if (eventRaised is WebErrorEvent) {
                AddWebRequestInformationDataFields(dataFields, ((WebErrorEvent)eventRaised).RequestInformation); 
                AddWebThreadInformationDataFields(dataFields, ((WebErrorEvent)eventRaised).ThreadInformation);
            } 
 
            if (eventRaised is WebAuthenticationSuccessAuditEvent) {
                dataFields.Add(((WebAuthenticationSuccessAuditEvent)eventRaised).NameToAuthenticate); 
            }

            if (eventRaised is WebAuthenticationFailureAuditEvent) {
                dataFields.Add(((WebAuthenticationFailureAuditEvent)eventRaised).NameToAuthenticate); 
            }
 
            if (eventRaised is WebViewStateFailureAuditEvent) { 
                AddViewStateExceptionDataFields(dataFields, ((WebViewStateFailureAuditEvent)eventRaised).ViewStateException );
            } 

            for (int i = 0; i < dataFields.Count; i++) {
                object field = dataFields[i];
 
                if (field == null) {
                    continue; 
                } 

                int len = ((string)field).Length; 

                if (len > EventLogParameterMaxLength) {
                    // Truncate it and append a warning message to the end
                    dataFields[i] = ((string)field).Substring(0, _maxTruncatedParamLen) + _truncateWarning; 
                }
            } 
 
#if !FEATURE_PAL // FEATURE_PAL does not enable IIS-based hosting features
            hr = UnsafeNativeMethods.RaiseEventlogEvent((int)eventType, (string[])dataFields.ToArray(typeof(string)), dataFields.Count); 
            if (hr != 0) {
                throw new HttpException(SR.GetString(SR.Event_log_provider_error, "0x" + hr.ToString("X8", CultureInfo.InstalledUICulture)));
            }
#endif // !FEATURE_PAL 
        }
 
        public override void Flush() { 
        }
 
        public override void Shutdown() {
        }
    }
 
}

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