EventlogProvider.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Management / EventlogProvider.cs / 1305376 / 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; 
    using System.Text; 

    //////////// 
    // Events
    ////////////

    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(HttpUtility.UrlDecode(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));
        } 
 
        private const int MAX_CHARS_IN_EXCEPTION_MSG = 8000;
        void AddExceptionDataFields(ArrayList dataFields, Exception exception) { 
            if (exception == null) {
                dataFields.Add(null);
                dataFields.Add(null);
            } 
            else {
                dataFields.Add(exception.GetType().Name); 
 
                // Get the message and stack with all InnerExceptions
                StringBuilder sb = new StringBuilder(1024); 
                for(int totalLength = 0; totalLength 0) {
                        // Append stack if there is space
                        string stackTrace = exception.StackTrace; 
                        if (!String.IsNullOrEmpty(stackTrace)) {
                            if (stackTrace.Length > remainingSpace) { 
                                stackTrace = stackTrace.Substring(0, remainingSpace); 
                            }
                            sb.Append("\n"); 
                            sb.Append(stackTrace);
                            totalLength += stackTrace.Length + 1;
                        }
                        sb.Append("\n\n"); 
                        totalLength += 2;
                    } 
 
                    // deal with next InnerException in next iteration
                    exception = exception.InnerException; 
                }

                dataFields.Add(sb.ToString());
             } 
        }
 
        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() { 
        }
 
        // Dev10 720406: ReportEvent treats %N as an insertion string, so we can't include this in the message.
        // Instead, we will replace such occurrences with [%]N.
        private static string ReplaceInsertionStringPlaceholders(string s) {
            if (String.IsNullOrEmpty(s)) { 
                return s;
            } 
            int len = s.Length; 
            int maxIndex = len - 1;
            int matches = 0; 
            for (int i = 0; i < maxIndex; i++) {
                if (s[i] == '%' && Char.IsDigit(s[i+1])) {
                    matches++;
                } 
            }
            if (matches == 0) { 
                return s; 
            }
            char[] newChars = new char[len + (2 * matches)]; 
            int idx = 0;
            for (int i = 0; i < maxIndex; i++) {
                if (s[i] == '%' && Char.IsDigit(s[i+1])) {
                    newChars[idx++] = '['; 
                    newChars[idx++] = '%';
                    newChars[idx++] = ']'; 
                } 
                else {
                    newChars[idx++] = s[i]; 
                }
            }
            newChars[newChars.Length-1] = s[maxIndex];
            return new String(newChars); 
        }
    } 
 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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EventlogProvider.cs source code in C# .NET

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