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//------------------------------------------------------------------------------
// <copyright file="CapabilitiesState.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.Configuration {
using System.Collections;
using System.Collections.Specialized;
using System.Diagnostics;
using System.Globalization;
using System.Reflection;
using System.Security;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using System.Web.Caching;
using System.Web.Compilation;
using System.Web.Hosting;
using System.Security.Permissions;
//
// Encapsulates the evaluation state used in computing capabilities
//
internal class CapabilitiesState {
internal HttpRequest _request;
internal IDictionary _values;
internal ArrayList _matchlist;
internal ArrayList _regexlist;
internal bool _exit;
internal bool _evaluateOnlyUserAgent;
internal CapabilitiesState(HttpRequest request, IDictionary values) {
_request = request;
_values = values;
_matchlist = new ArrayList();
_regexlist = new ArrayList();
}
internal bool EvaluateOnlyUserAgent {
get {
return _evaluateOnlyUserAgent;
}
set {
_evaluateOnlyUserAgent = value;
}
}
internal virtual void ClearMatch() {
if (_matchlist == null) {
_regexlist = new ArrayList();
_matchlist = new ArrayList();
}
else {
_regexlist.Clear();
_matchlist.Clear();
}
}
internal virtual void AddMatch(DelayedRegex regex, Match match) {
_regexlist.Add(regex);
_matchlist.Add(match);
}
internal virtual void PopMatch() {
_regexlist.RemoveAt(_regexlist.Count - 1);
_matchlist.RemoveAt(_matchlist.Count - 1);
}
internal virtual String ResolveReference(String refname) {
if (_matchlist == null)
return String.Empty;
int i = _matchlist.Count;
while (i > 0) {
i--;
int groupnum = ((DelayedRegex)_regexlist[i]).GroupNumberFromName(refname);
if (groupnum >= 0) {
Group group = ((Match)_matchlist[i]).Groups[groupnum];
if (group.Success) {
return group.ToString();
}
}
}
return String.Empty;
}
[AspNetHostingPermission(SecurityAction.Assert, Level=AspNetHostingPermissionLevel.Low)]
string ResolveServerVariableWithAssert(string varname) {
string result = _request.ServerVariables[varname];
if (result == null)
return string.Empty;
return result;
}
internal virtual String ResolveServerVariable(String varname) {
if (varname.Length == 0 || varname == "HTTP_USER_AGENT")
return HttpCapabilitiesDefaultProvider.GetUserAgent(_request);
if (EvaluateOnlyUserAgent)
return string.Empty;
return ResolveServerVariableWithAssert(varname);
}
internal virtual String ResolveVariable(String varname) {
String result;
result = (String)_values[varname];
if (result == null)
return String.Empty;
return result;
}
internal virtual void SetVariable(String varname, String value) {
_values[varname] = value;
}
internal virtual bool Exit {
get {
return _exit;
}
set {
_exit = value;
}
}
}
}
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