HttpRuntimeSection.cs source code in C# .NET

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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Configuration / HttpRuntimeSection.cs / 1477467 / HttpRuntimeSection.cs

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

namespace System.Web.Configuration { 
    using System; 
    using System.Xml;
    using System.Configuration; 
    using System.Collections.Specialized;
    using System.Collections;
    using System.Globalization;
    using System.IO; 
    using System.Text;
    using System.Web.Util; 
    using System.ComponentModel; 
    using System.Security.Permissions;
 
    public sealed class HttpRuntimeSection : ConfigurationSection {
#if !FEATURE_PAL // FEATURE_PAL-specific timeout values
        internal const int DefaultExecutionTimeout = 110;
#else // !FEATURE_PAL 
        // The timeout needs to be extended, since Coriolis/Rotor is much slower
        // especially platforms like Solaris wan't be able to process complicated 
        // requests if in debug mode. 
        // Remove or change this once the real timeout is known
#if DEBUG 
        internal const int DefaultExecutionTimeout = 110 * 10;
#else // DEBUG
        internal const int DefaultExecutionTimeout = 110 * 5;
#endif // DEBUG 

#endif // !FEATURE_PAL 
        internal const int DefaultMaxRequestLength = 4096 * 1024;  // 4MB 
        internal const int DefaultRequestLengthDiskThreshold = 80 * 1024; // 80KB
        internal const int DefaultMinFreeThreads = 8; 
        internal const int DefaultMinLocalRequestFreeThreads = 4;
        internal const int DefaultAppRequestQueueLimit = 100;
        internal const int DefaultShutdownTimeout = 90;
        internal const int DefaultDelayNotificationTimeout = 0; 
        internal const int DefaultWaitChangeNotification = 0;
        internal const int DefaultMaxWaitChangeNotification = 0; 
        internal const bool DefaultEnableKernelOutputCache = true; 
        internal const bool DefaultRequireRootedSaveAsPath = true;
        internal const bool DefaultSendCacheControlHeader = true; 
        internal const string DefaultEncoderType = "System.Web.Util.HttpEncoder";
        internal static readonly Version DefaultRequestValidationMode = VersionUtil.Framework40;
        internal const string DefaultRequestValidationModeString = "4.0";
        internal const string DefaultRequestValidationType = "System.Web.Util.RequestValidator"; 
        internal const string DefaultRequestPathInvalidCharacters = "<,>,*,%,&,:,\\,?";
        internal const int    DefaultMaxUrlLength = 260; 
        internal const int    DefaultMaxQueryStringLength = 2048; 
        internal const bool   DefaultRelaxedUrlToFileSystemMapping = false;
 
        private bool enableVersionHeaderCache = true;
        private bool enableVersionHeaderCached = false;
        private TimeSpan executionTimeoutCache;
        private bool executionTimeoutCached = false; 

        private bool sendCacheControlHeaderCached = false; 
        private bool sendCacheControlHeaderCache; 

        private static ConfigurationPropertyCollection _properties; 
        private static readonly ConfigurationProperty _propExecutionTimeout =
            new ConfigurationProperty("executionTimeout",
                                        typeof(TimeSpan),
                                        TimeSpan.FromSeconds((double)DefaultExecutionTimeout), 
                                        StdValidatorsAndConverters.TimeSpanSecondsConverter,
                                        StdValidatorsAndConverters.PositiveTimeSpanValidator, 
                                        ConfigurationPropertyOptions.None); 
        private static readonly ConfigurationProperty _propMaxRequestLength =
            new ConfigurationProperty("maxRequestLength", 
                                        typeof(int),
                                        4096,
                                        null,
                                        StdValidatorsAndConverters.NonZeroPositiveIntegerValidator, 
                                        ConfigurationPropertyOptions.None);
        private static readonly ConfigurationProperty _propRequestLengthDiskThreshold = 
            new ConfigurationProperty("requestLengthDiskThreshold", 
                                        typeof(int),
                                        80, 
                                        null,
                                        StdValidatorsAndConverters.NonZeroPositiveIntegerValidator,
                                        ConfigurationPropertyOptions.None);
        private static readonly ConfigurationProperty _propUseFullyQualifiedRedirectUrl = 
            new ConfigurationProperty("useFullyQualifiedRedirectUrl",
                                        typeof(bool), 
                                        false, 
                                        ConfigurationPropertyOptions.None);
        private static readonly ConfigurationProperty _propMinFreeThreads = 
            new ConfigurationProperty("minFreeThreads",
                                        typeof(int),
                                        8,
                                        null, 
                                        StdValidatorsAndConverters.PositiveIntegerValidator,
                                        ConfigurationPropertyOptions.None); 
        private static readonly ConfigurationProperty _propMinLocalRequestFreeThreads = 
            new ConfigurationProperty("minLocalRequestFreeThreads",
                                        typeof(int), 
                                        4,
                                        null,
                                        StdValidatorsAndConverters.PositiveIntegerValidator,
                                        ConfigurationPropertyOptions.None); 
        private static readonly ConfigurationProperty _propAppRequestQueueLimit =
            new ConfigurationProperty("appRequestQueueLimit", 
                                        typeof(int), 
                                        5000,
                                        null, 
                                        StdValidatorsAndConverters.NonZeroPositiveIntegerValidator,
                                        ConfigurationPropertyOptions.None);
        private static readonly ConfigurationProperty _propEnableKernelOutputCache =
            new ConfigurationProperty("enableKernelOutputCache", 
                                        typeof(bool),
                                        true, 
                                        ConfigurationPropertyOptions.None); 
        private static readonly ConfigurationProperty _propEnableVersionHeader =
            new ConfigurationProperty("enableVersionHeader", 
                                        typeof(bool),
                                        true,
                                        ConfigurationPropertyOptions.None);
        private static readonly ConfigurationProperty _propRequireRootedSaveAsPath = 
            new ConfigurationProperty("requireRootedSaveAsPath",
                                        typeof(bool), 
                                        true, 
                                        ConfigurationPropertyOptions.None);
        private static readonly ConfigurationProperty _propEnable = 
            new ConfigurationProperty("enable",
                                        typeof(bool),
                                        true,
                                        ConfigurationPropertyOptions.None); 
        private static readonly ConfigurationProperty _propShutdownTimeout =
            new ConfigurationProperty("shutdownTimeout", 
                                        typeof(TimeSpan), 
                                        TimeSpan.FromSeconds((double)DefaultShutdownTimeout),
                                        StdValidatorsAndConverters.TimeSpanSecondsConverter, 
                                        null,
                                        ConfigurationPropertyOptions.None);
        private static readonly ConfigurationProperty _propDelayNotificationTimeout =
            new ConfigurationProperty("delayNotificationTimeout", 
                                        typeof(TimeSpan),
                                        TimeSpan.FromSeconds((double)DefaultDelayNotificationTimeout), 
                                        StdValidatorsAndConverters.TimeSpanSecondsConverter, 
                                        null,
                                        ConfigurationPropertyOptions.None); 
        private static readonly ConfigurationProperty _propWaitChangeNotification =
            new ConfigurationProperty("waitChangeNotification",
                                        typeof(int),
                                        0, 
                                        null,
                                        StdValidatorsAndConverters.PositiveIntegerValidator, 
                                        ConfigurationPropertyOptions.None); 
        private static readonly ConfigurationProperty _propMaxWaitChangeNotification =
            new ConfigurationProperty("maxWaitChangeNotification", 
                                        typeof(int),
                                        0,
                                        null,
                                        StdValidatorsAndConverters.PositiveIntegerValidator, 
                                        ConfigurationPropertyOptions.None);
        private static readonly ConfigurationProperty _propEnableHeaderChecking = 
            new ConfigurationProperty("enableHeaderChecking", 
                                        typeof(bool),
                                        true, 
                                        ConfigurationPropertyOptions.None);
        private static readonly ConfigurationProperty _propSendCacheControlHeader =
            new ConfigurationProperty("sendCacheControlHeader",
                                        typeof(bool), 
                                        DefaultSendCacheControlHeader,
                                        ConfigurationPropertyOptions.None); 
        private static readonly ConfigurationProperty _propApartmentThreading = 
            new ConfigurationProperty("apartmentThreading",
                                        typeof(bool), 
                                        false,
                                        ConfigurationPropertyOptions.None);
        private static readonly ConfigurationProperty _propEncoderType =
            new ConfigurationProperty("encoderType", 
                                        typeof(string),
                                        DefaultEncoderType, 
                                        null, 
                                        StdValidatorsAndConverters.NonEmptyStringValidator,
                                        ConfigurationPropertyOptions.None); 
        private static readonly ConfigurationProperty _propRequestValidationMode =
            new ConfigurationProperty("requestValidationMode",
                                        typeof(Version),
                                        DefaultRequestValidationMode, 
                                        StdValidatorsAndConverters.VersionConverter,
                                        null, 
                                        ConfigurationPropertyOptions.None); 
        private static readonly ConfigurationProperty _propRequestValidationType =
            new ConfigurationProperty("requestValidationType", 
                                        typeof(string),
                                        DefaultRequestValidationType,
                                        null,
                                        StdValidatorsAndConverters.NonEmptyStringValidator, 
                                        ConfigurationPropertyOptions.None);
 
        private static readonly ConfigurationProperty _propRequestPathInvalidCharacters = 
            new ConfigurationProperty("requestPathInvalidCharacters",
                                      typeof(string), 
                                      DefaultRequestPathInvalidCharacters,
                                      StdValidatorsAndConverters.WhiteSpaceTrimStringConverter,
                                      null,
                                      ConfigurationPropertyOptions.None); 

        private static readonly ConfigurationProperty _propMaxUrlLength = 
            new ConfigurationProperty("maxUrlLength", 
                                        typeof(int),
                                        DefaultMaxUrlLength, 
                                        null,
                                        new IntegerValidator(0, 2097151), // Max from VS 330766
                                        ConfigurationPropertyOptions.None);
 
        private static readonly ConfigurationProperty _propMaxQueryStringLength =
            new ConfigurationProperty("maxQueryStringLength", 
                                        typeof(int), 
                                        DefaultMaxQueryStringLength,
                                        null, 
                                        new IntegerValidator(0, 2097151), // Max from VS 330766
                                        ConfigurationPropertyOptions.None);

        private static readonly ConfigurationProperty _propRelaxedUrlToFileSystemMapping = 
            new ConfigurationProperty("relaxedUrlToFileSystemMapping",
                                      typeof(bool), 
                                      DefaultRelaxedUrlToFileSystemMapping, 
                                      ConfigurationPropertyOptions.None);
 

        private int _MaxRequestLengthBytes;
        private int _RequestLengthDiskThresholdBytes;
        private static String s_versionHeader = null; 
        private Version _requestValidationMode;
 
        /*         
         
*/
 
        static HttpRuntimeSection() { 
            // Property initialization
            _properties = new ConfigurationPropertyCollection(); 
            _properties.Add(_propExecutionTimeout);
            _properties.Add(_propMaxRequestLength);
            _properties.Add(_propRequestLengthDiskThreshold);
            _properties.Add(_propUseFullyQualifiedRedirectUrl); 
            _properties.Add(_propMinFreeThreads);
            _properties.Add(_propMinLocalRequestFreeThreads); 
            _properties.Add(_propAppRequestQueueLimit); 
            _properties.Add(_propEnableKernelOutputCache);
            _properties.Add(_propEnableVersionHeader); 
            _properties.Add(_propRequireRootedSaveAsPath);
            _properties.Add(_propEnable);

            _properties.Add(_propShutdownTimeout); 
            _properties.Add(_propDelayNotificationTimeout);
            _properties.Add(_propWaitChangeNotification); 
            _properties.Add(_propMaxWaitChangeNotification); 

            _properties.Add(_propEnableHeaderChecking); 
            _properties.Add(_propSendCacheControlHeader);
            _properties.Add(_propApartmentThreading);

            _properties.Add(_propEncoderType); 
            _properties.Add(_propRequestValidationMode);
            _properties.Add(_propRequestValidationType); 
            _properties.Add(_propRequestPathInvalidCharacters); 
            _properties.Add(_propMaxUrlLength);
            _properties.Add(_propMaxQueryStringLength); 
            _properties.Add(_propRelaxedUrlToFileSystemMapping);
        }

        public HttpRuntimeSection() { 
            _MaxRequestLengthBytes = -1;
            _RequestLengthDiskThresholdBytes = -1; 
        } 

        protected override ConfigurationPropertyCollection Properties { 
            get {
                return _properties;
            }
        } 

        [ConfigurationProperty("executionTimeout", DefaultValue = "00:01:50")] 
        [TypeConverter(typeof(TimeSpanSecondsConverter))] 
        [TimeSpanValidator(MinValueString="00:00:00", MaxValueString=TimeSpanValidatorAttribute.TimeSpanMaxValue)]
        public TimeSpan ExecutionTimeout { 
            get {
                if (executionTimeoutCached == false) {
                    executionTimeoutCache = (TimeSpan)base[_propExecutionTimeout];
                    executionTimeoutCached = true; 
                }
                return executionTimeoutCache; 
            } 
            set {
                base[_propExecutionTimeout] = value; 
                executionTimeoutCache = value;
            }

 
        }
 
        [ConfigurationProperty("maxRequestLength", DefaultValue = 4096)] 
        [IntegerValidator(MinValue = 0)]
        public int MaxRequestLength { 
            get {
                return (int)base[_propMaxRequestLength];
            }
            set { 
                if (value < RequestLengthDiskThreshold) {
                    throw new ConfigurationErrorsException(SR.GetString( 
                        SR.Config_max_request_length_smaller_than_max_request_length_disk_threshold), 
                         ElementInformation.Properties[_propMaxRequestLength.Name].Source,
                         ElementInformation.Properties[_propMaxRequestLength.Name].LineNumber); 
                }
                base[_propMaxRequestLength] = value;
            } //
        } 

        [ConfigurationProperty("requestLengthDiskThreshold", DefaultValue = 80)] 
        [IntegerValidator(MinValue = 1)] 
        public int RequestLengthDiskThreshold {
            get { 
                return (int)base[_propRequestLengthDiskThreshold];
            }
            set {
                if (value > MaxRequestLength) { 
                    throw new ConfigurationErrorsException(SR.GetString(
                        SR.Config_max_request_length_disk_threshold_exceeds_max_request_length), 
                         ElementInformation.Properties[_propRequestLengthDiskThreshold.Name].Source, 
                         ElementInformation.Properties[_propRequestLengthDiskThreshold.Name].LineNumber);
                } 
                base[_propRequestLengthDiskThreshold] = value;
            }
        }
 
        [ConfigurationProperty("useFullyQualifiedRedirectUrl", DefaultValue = false)]
        public bool UseFullyQualifiedRedirectUrl { 
            get { 
                return (bool)base[_propUseFullyQualifiedRedirectUrl];
            } 
            set {
                base[_propUseFullyQualifiedRedirectUrl] = value;
            }
        } 

        [ConfigurationProperty("minFreeThreads", DefaultValue = 8)] 
        [IntegerValidator(MinValue = 0)] 
        public int MinFreeThreads {
            get { 
                return (int)base[_propMinFreeThreads];
            }
            set {
                base[_propMinFreeThreads] = value; 
            }
        } 
 
        [ConfigurationProperty("minLocalRequestFreeThreads", DefaultValue = 4)]
        [IntegerValidator(MinValue = 0)] 
        public int MinLocalRequestFreeThreads {
            get {
                return (int)base[_propMinLocalRequestFreeThreads];
            } 
            set {
                base[_propMinLocalRequestFreeThreads] = value; 
            } 
        }
 
        [ConfigurationProperty("appRequestQueueLimit", DefaultValue = 5000)]
        [IntegerValidator(MinValue = 1)]
        public int AppRequestQueueLimit {
            get { 
                return (int)base[_propAppRequestQueueLimit];
            } 
            set { 
                base[_propAppRequestQueueLimit] = value;
            } 
        }

        [ConfigurationProperty("enableKernelOutputCache", DefaultValue = true)]
        public bool EnableKernelOutputCache { 
            get {
                return (bool)base[_propEnableKernelOutputCache]; 
            } 
            set {
                base[_propEnableKernelOutputCache] = value; 
            }
        }

        [ConfigurationProperty("enableVersionHeader", DefaultValue = true)] 
        public bool EnableVersionHeader {
            get { 
                if (enableVersionHeaderCached == false) { 
                    enableVersionHeaderCache = (bool)base[_propEnableVersionHeader];
                    enableVersionHeaderCached = true; 
                }
                return enableVersionHeaderCache;
            }
            set { 
                base[_propEnableVersionHeader] = value;
                enableVersionHeaderCache = value; 
            } 
        }
 
        [ConfigurationProperty("apartmentThreading", DefaultValue = false)]
        public bool ApartmentThreading {
            get {
                return (bool)base[_propApartmentThreading]; 
            }
            set { 
                base[_propApartmentThreading] = value; 
            }
        } 

        [ConfigurationProperty("requireRootedSaveAsPath", DefaultValue = true)]
        public bool RequireRootedSaveAsPath {
            get { 
                return (bool)base[_propRequireRootedSaveAsPath];
            } 
            set { 
                base[_propRequireRootedSaveAsPath] = value;
            } 
        }

        [ConfigurationProperty("enable", DefaultValue = true)]
        public bool Enable { 
            get {
                return (bool)base[_propEnable]; 
            } 
            set {
                base[_propEnable] = value; 
            }
        }

        [ConfigurationProperty("sendCacheControlHeader", DefaultValue = DefaultSendCacheControlHeader)] 
        public bool SendCacheControlHeader {
            get { 
                if (sendCacheControlHeaderCached == false) { 
                    sendCacheControlHeaderCache = (bool)base[_propSendCacheControlHeader];
                    sendCacheControlHeaderCached = true; 
                }
                return sendCacheControlHeaderCache;
            }
            set { 
                base[_propSendCacheControlHeader] = value;
                sendCacheControlHeaderCache = value; 
            } 
        }
 
        [ConfigurationProperty("shutdownTimeout", DefaultValue = "00:01:30")]
        [TypeConverter(typeof(TimeSpanSecondsConverter))]
        public TimeSpan ShutdownTimeout {
            get { 
                return (TimeSpan)base[_propShutdownTimeout];
            } 
            set { 
                base[_propShutdownTimeout] = value;
            } 
        }

        [ConfigurationProperty("delayNotificationTimeout", DefaultValue = "00:00:00")]
        [TypeConverter(typeof(TimeSpanSecondsConverter))] 
        public TimeSpan DelayNotificationTimeout {
            get { 
                return (TimeSpan)base[_propDelayNotificationTimeout]; 
            }
            set { 
                base[_propDelayNotificationTimeout] = value;
            }
        }
 
        [ConfigurationProperty("waitChangeNotification", DefaultValue = 0)]
        [IntegerValidator(MinValue = 0)] 
        public int WaitChangeNotification { 
            get {
                return (int)base[_propWaitChangeNotification]; 
            }
            set {
                base[_propWaitChangeNotification] = value;
            } 
        }
 
        [ConfigurationProperty("maxWaitChangeNotification", DefaultValue = 0)] 
        [IntegerValidator(MinValue = 0)]
        public int MaxWaitChangeNotification { 
            get {
                return (int)base[_propMaxWaitChangeNotification];
            }
            set { 
                base[_propMaxWaitChangeNotification] = value;
            } 
        } 

        [ConfigurationProperty("enableHeaderChecking", DefaultValue = true)] 
        public bool EnableHeaderChecking {
            get {
                return (bool)base[_propEnableHeaderChecking];
            } 
            set {
                base[_propEnableHeaderChecking] = value; 
            } 
        }
 
        [ConfigurationProperty("encoderType", DefaultValue = DefaultEncoderType)]
        [StringValidator(MinLength = 1)]
        public string EncoderType {
            get { 
                return (string)base[_propEncoderType];
            } 
            set { 
                base[_propEncoderType] = value;
            } 
        }

        [ConfigurationProperty("requestValidationMode", DefaultValue = DefaultRequestValidationModeString)]
        [TypeConverter(typeof(VersionConverter))] 
        public Version RequestValidationMode {
            get { 
                if (_requestValidationMode == null) { 
                    _requestValidationMode = (Version)base[_propRequestValidationMode];
                } 
                return _requestValidationMode;
            }
            set {
                _requestValidationMode = value; 
                base[_propRequestValidationMode] = value;
            } 
        } 

        [ConfigurationProperty("requestValidationType", DefaultValue = DefaultRequestValidationType)] 
        [StringValidator(MinLength = 1)]
        public string RequestValidationType {
            get {
                return (string)base[_propRequestValidationType]; 
            }
            set { 
                base[_propRequestValidationType] = value; 
            }
        } 

        [ConfigurationProperty("requestPathInvalidCharacters", DefaultValue = DefaultRequestPathInvalidCharacters)]
        public string RequestPathInvalidCharacters {
            get { 
                return (string)base[_propRequestPathInvalidCharacters];
            } 
            set { 
                base[_propRequestPathInvalidCharacters] = value;
                _RequestPathInvalidCharactersArray = null; 
            }
        }

        private int _MaxUrlLength = 0; 
        [ConfigurationProperty("maxUrlLength", DefaultValue = DefaultMaxUrlLength)]
        [IntegerValidator(MinValue = 0)] 
        public int MaxUrlLength { 
            get {
                if (_MaxUrlLength == 0) 
                    _MaxUrlLength = (int)base[_propMaxUrlLength];
                return _MaxUrlLength;
            }
            set { 
                _MaxUrlLength = value;
                base[_propMaxUrlLength] = value; 
            } 
        }
 

        private int _MaxQueryStringLength = 0;
        [ConfigurationProperty("maxQueryStringLength", DefaultValue = DefaultMaxQueryStringLength)]
        [IntegerValidator(MinValue = 0)] 
        public int MaxQueryStringLength {
            get { 
                if (_MaxQueryStringLength == 0) 
                    _MaxQueryStringLength = (int)base[_propMaxQueryStringLength];
                return _MaxQueryStringLength; 
            }
            set {
                _MaxQueryStringLength = value;
                base[_propMaxQueryStringLength] = value; 
            }
        } 
 
        [ConfigurationProperty("relaxedUrlToFileSystemMapping", DefaultValue = DefaultRelaxedUrlToFileSystemMapping)]
        public bool RelaxedUrlToFileSystemMapping { 
            get {
                return (bool)base[_propRelaxedUrlToFileSystemMapping];
            }
            set { 
                base[_propRelaxedUrlToFileSystemMapping] = value;
            } 
        } 

 
        private int BytesFromKilobytes(int kilobytes) {
            long maxLength = kilobytes * 1024L;
            return ((maxLength < Int32.MaxValue) ? (int)maxLength : Int32.MaxValue);
        } 

        internal int MaxRequestLengthBytes { 
            get { 
                if (_MaxRequestLengthBytes < 0) {
                    _MaxRequestLengthBytes = BytesFromKilobytes(MaxRequestLength); 
                }
                return _MaxRequestLengthBytes;
            }
        } 

        internal int RequestLengthDiskThresholdBytes { 
            get { 
                if (_RequestLengthDiskThresholdBytes < 0) {
                    _RequestLengthDiskThresholdBytes = BytesFromKilobytes(RequestLengthDiskThreshold); 
                }
                return _RequestLengthDiskThresholdBytes;
            }
        } 

        internal String VersionHeader { 
            get { 
                if (!EnableVersionHeader) {
                    return null; 
                }

                if (s_versionHeader == null) {
                    String header = null; 
                    // construct once (race condition here doesn't matter)
                    try { 
                        String version = VersionInfo.SystemWebVersion; 
                        int i = version.LastIndexOf('.');
                        if (i > 0) { 
                            header = version.Substring(0, i);
                        }
                    }
                    catch { 
                    }
 
                    if (header == null) { 
                        header = String.Empty;
                    } 

                    s_versionHeader = header;
                }
 
                return s_versionHeader;
            } 
        } 

        ////////////////////////////////////////////////////////////////// 
        //////////////////////////////////////////////////////////////////
        //////////////////////////////////////////////////////////////////
        private  char [] _RequestPathInvalidCharactersArray = null;
        internal char [] RequestPathInvalidCharactersArray { 
            get {
                if (_RequestPathInvalidCharactersArray != null) 
                    return _RequestPathInvalidCharactersArray; 

                _RequestPathInvalidCharactersArray = DecodeAndThenSplitString(RequestPathInvalidCharacters); 
                if (_RequestPathInvalidCharactersArray == null) {
                    // Maybe comma was one of the invalid chars, which can cause DecodeAndThenSplitString to fail
                    // Split using the comma and then decode each part
                    _RequestPathInvalidCharactersArray = SplitStringAndThenDecode(RequestPathInvalidCharacters); 
                }
 
                if (_RequestPathInvalidCharactersArray == null) { // failed to construct invalid chars 
                    throw new ConfigurationErrorsException(SR.GetString(SR.Config_property_generic),
                                                           ElementInformation.Properties[_propRequestPathInvalidCharacters.Name].Source, 
                                                           ElementInformation.Properties[_propRequestPathInvalidCharacters.Name].LineNumber);
                }
                return _RequestPathInvalidCharactersArray;
            } 
        }
 
        ////////////////////////////////////////////////////////////////// 
        //////////////////////////////////////////////////////////////////
        private static char [] DecodeAndThenSplitString(string invalidCharString) { 
            if (string.IsNullOrEmpty(invalidCharString)) {
                return new char[0];
            }
 
            string [] stringsDecoded = HttpUtility.UrlDecode(invalidCharString, Encoding.UTF8).Split(',');
            char []   charsDecoded   = new char[stringsDecoded.Length]; 
 
            for(int iter=0; iter

                        

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