Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / ManagedLibraries / Remoting / Channels / CORE / BaseTransportHeaders.cs / 1305376 / BaseTransportHeaders.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //========================================================================== // File: BaseTransportHeaders.cs // // Summary: Base class for special-cased transport headers implementations. // //========================================================================= using System; using System.Collections; using System.Globalization; using System.Net; namespace System.Runtime.Remoting.Channels { [Serializable] internal class BaseTransportHeaders : ITransportHeaders { // IMPORTANT: If a new wellknown header is added, MapHeaderNameToIndex, // GetValueFromHeaderIndex, and SetValueFromHeaderIndex methods must // be updated (as well as WellknownHeaderCount)!!! internal const int WellknownHeaderCount = 4; private Object _connectionId; // 0) CommonTransportKeys.ConnectionId private Object _ipAddress; // 1) CommonTransportKeys.IPAddress private String _requestUri; // 2) CommonTransportKeys.RequestUri private String _contentType; // 3) "Content-Type" // transport headers structure is for non well-known headers private ITransportHeaders _otherHeaders; public BaseTransportHeaders() { _otherHeaders = null; } public String RequestUri { get { return _requestUri; } set { _requestUri = value; } } // RequestUri public String ContentType { get { return _contentType; } set { _contentType = value; } } // ContentType public Object ConnectionId { set { _connectionId = value; } } public IPAddress IPAddress { set { _ipAddress = value; } } // // ITransportHeaders implementation // public Object this[Object key] { get { String strKey = key as String; if (strKey != null) { int index = MapHeaderNameToIndex(strKey); if (index != -1) return GetValueFromHeaderIndex(index); } if (_otherHeaders != null) return _otherHeaders[key]; return null; } // get set { bool bSet = false; String strKey = key as String; if (strKey != null) { int index = MapHeaderNameToIndex(strKey); if (index != -1) { SetValueFromHeaderIndex(index, value); bSet = true; } } if (!bSet) { if (_otherHeaders == null) _otherHeaders = new TransportHeaders(); _otherHeaders[key] = value; } } // set } // Object this[Object key] public IEnumerator GetEnumerator() { return new BaseTransportHeadersEnumerator(this); } // GetEnumerator internal IEnumerator GetOtherHeadersEnumerator() { if (_otherHeaders == null) return null; return _otherHeaders.GetEnumerator(); } // GetOtherHeadersEnumerator internal int MapHeaderNameToIndex(String headerName) { // 0) CommonTransportKeys.ConnectionId // 1) CommonTransportKeys.IPAddress // 2) CommonTransportKeys.RequestUri // 3) "Content-Type" if (String.Compare(headerName, CommonTransportKeys.ConnectionId, StringComparison.OrdinalIgnoreCase) == 0) return 0; else if (String.Compare(headerName, CommonTransportKeys.IPAddress, StringComparison.OrdinalIgnoreCase) == 0) return 1; else if (String.Compare(headerName, CommonTransportKeys.RequestUri, StringComparison.OrdinalIgnoreCase) == 0) return 2; else if (String.Compare(headerName, "Content-Type", StringComparison.OrdinalIgnoreCase) == 0) return 3; return -1; } // MapHeaderNameToIndex internal String MapHeaderIndexToName(int index) { // 0) CommonTransportKeys.ConnectionId // 1) CommonTransportKeys.IPAddress // 2) CommonTransportKeys.RequestUri // 3) "Content-Type" switch (index) { case 0: return CommonTransportKeys.ConnectionId; case 1: return CommonTransportKeys.IPAddress; case 2: return CommonTransportKeys.RequestUri; case 3: return "Content-Type"; default: return null; } } // MapHeaderNameToIndex internal Object GetValueFromHeaderIndex(int index) { // NOTE: If this method returns the null, then that indicates the header has no // value (i.e. isn't in the "dictionary"). For the purposes of iteration, this // means that the header should be skipped. // 0) CommonTransportKeys.ConnectionId // 1) CommonTransportKeys.IPAddress // 2) CommonTransportKeys.RequestUri // 3) "Content-Type" switch (index) { case 0: return _connectionId; case 1: return _ipAddress; case 2: return _requestUri; case 3: return _contentType; default: return null; } } // MapHeaderIndexToValue internal void SetValueFromHeaderIndex(int index, Object value) { // NOTE: If this method returns the null, then that indicates the header has no // value (i.e. isn't in the "dictionary"). For the purposes of iteration, this // means that the header should be skipped. // 0) CommonTransportKeys.ConnectionId // 1) CommonTransportKeys.IPAddress // 2) CommonTransportKeys.RequestUri // 3) "Content-Type" switch (index) { case 0: _connectionId = value; break; case 1: _ipAddress = value; break; case 2: _requestUri = (String)value; break; case 3: _contentType = (String)value; break; default: { InternalRemotingServices.RemotingAssert(false, "someone forgot to update this method"); break; } } // switch (index) } // MapHeaderIndexToValue } // class BaseTransportHeaders internal class BaseTransportHeadersEnumerator : IEnumerator { private BaseTransportHeaders _headers; private bool _bStarted; private int _currentIndex; private IEnumerator _otherHeadersEnumerator; public BaseTransportHeadersEnumerator(BaseTransportHeaders headers) { _headers = headers; Reset(); } // BaseTransportHeadersEnumerator public bool MoveNext() { if (_currentIndex != -1) { if (_bStarted) _currentIndex++; else _bStarted = true; while (_currentIndex != -1) { if (_currentIndex >= BaseTransportHeaders.WellknownHeaderCount) { _otherHeadersEnumerator = _headers.GetOtherHeadersEnumerator(); _currentIndex = -1; } else { if (_headers.GetValueFromHeaderIndex(_currentIndex) != null) return true; _currentIndex++; } } } if (_otherHeadersEnumerator != null) { if (!_otherHeadersEnumerator.MoveNext()) { _otherHeadersEnumerator = null; return false; } else return true; } return false; } // MoveNext public void Reset() { _bStarted = false; _currentIndex = 0; _otherHeadersEnumerator = null; } // Reset public Object Current { get { if (!_bStarted) return null; if (_currentIndex != -1) { return new DictionaryEntry( _headers.MapHeaderIndexToName(_currentIndex), _headers.GetValueFromHeaderIndex(_currentIndex)); } if (_otherHeadersEnumerator != null) { return _otherHeadersEnumerator.Current; } return null; } } // Current } // class BaseTransportHeadersEnumerator } // namespace System.Runtime.Remoting.Channels // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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