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// Licensed under the MIT License.
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Xml;
using Microsoft.PowerShell.Commands;
using Dbg = System.Management.Automation.Diagnostics;
namespace System.Management.Automation.Remoting
{
/// <summary>
/// </summary>
public sealed class PSSessionConfigurationData
{
/// <summary>
/// </summary>
#pragma warning disable CA2211 // Non-constant fields should not be visible
public static bool IsServerManager;
#pragma warning restore CA2211 // Non-constant fields should not be visible
#region Public Properties
/// <summary>
/// </summary>
public List<string> ModulesToImport
{
get
{
return _modulesToImport;
}
}
internal List<object> ModulesToImportInternal
{
get
{
return _modulesToImportInternal;
}
}
/// <summary>
/// </summary>
public string PrivateData
{
get
{
return _privateData;
}
internal set
{
_privateData = value;
}
}
#endregion Public Properties
#region Internal Methods
private PSSessionConfigurationData()
{
}
internal static string Unescape(string s)
{
StringBuilder sb = new StringBuilder(s);
sb.Replace("<", "<");
sb.Replace(">", ">");
sb.Replace(""", "\"");
sb.Replace("'", "'");
sb.Replace("&", "&");
return sb.ToString();
}
internal static PSSessionConfigurationData Create(string configurationData)
{
PSSessionConfigurationData configuration = new PSSessionConfigurationData();
if (string.IsNullOrEmpty(configurationData))
{
return configuration;
}
configurationData = Unescape(configurationData);
XmlReaderSettings readerSettings = new XmlReaderSettings
{
CheckCharacters = false,
IgnoreComments = true,
IgnoreProcessingInstructions = true,
MaxCharactersInDocument = 10000,
XmlResolver = null,
ConformanceLevel = ConformanceLevel.Fragment
};
using (XmlReader reader = XmlReader.Create(new StringReader(configurationData), readerSettings))
{
// read the header <SessionConfigurationData>
if (reader.ReadToFollowing(SessionConfigToken))
{
bool isParamFound = reader.ReadToDescendant(ParamToken);
while (isParamFound)
{
if (!reader.MoveToAttribute(NameToken))
{
throw PSTraceSource.NewArgumentException(configurationData,
RemotingErrorIdStrings.NoAttributesFoundForParamElement,
NameToken, ValueToken, ParamToken);
}
string optionName = reader.Value;
if (string.Equals(optionName, PrivateDataToken, StringComparison.OrdinalIgnoreCase))
{
// this is a PrivateData element which we
// need to process
if (reader.ReadToFollowing(PrivateDataToken))
{
string privateData = reader.ReadOuterXml();
AssertValueNotAssigned(PrivateDataToken, configuration._privateData);
configuration._privateData = privateData;
}
}
else
{
if (!reader.MoveToAttribute(ValueToken))
{
throw PSTraceSource.NewArgumentException(configurationData,
RemotingErrorIdStrings.NoAttributesFoundForParamElement,
NameToken, ValueToken, ParamToken);
}
string optionValue = reader.Value;
configuration.Update(optionName, optionValue);
}
// move to next Param token.
isParamFound = reader.ReadToFollowing(ParamToken);
}
}
}
configuration.CreateCollectionIfNecessary();
return configuration;
}
#endregion Internal Methods
#region Private Members
private List<string> _modulesToImport;
private List<object> _modulesToImportInternal;
private string _privateData;
/// <summary>
/// Checks if the originalValue is empty. If not throws an exception.
/// </summary>
/// <param name="optionName"></param>
/// <param name="originalValue"></param>
/// <exception cref="ArgumentException">
/// 1. "optionName" is already defined
/// </exception>
private static void AssertValueNotAssigned(string optionName, object originalValue)
{
if (originalValue != null)
{
throw PSTraceSource.NewArgumentException(optionName,
RemotingErrorIdStrings.DuplicateInitializationParameterFound, optionName, SessionConfigToken);
}
}
/// <summary>
/// Using optionName and optionValue updates the current object.
/// </summary>
/// <param name="optionName"></param>
/// <param name="optionValue"></param>
/// <exception cref="ArgumentException">
/// 1. "optionName" is not valid in "InitializationParameters" section.
/// 2. "startupscript" must specify a PowerShell script file that ends with extension ".ps1".
/// </exception>
private void Update(string optionName, string optionValue)
{
switch (optionName.ToLowerInvariant())
{
case ModulesToImportToken:
{
AssertValueNotAssigned(ModulesToImportToken, _modulesToImport);
_modulesToImport = new List<string>();
_modulesToImportInternal = new List<object>();
object[] modulesToImport = optionValue.Split(',', StringSplitOptions.RemoveEmptyEntries);
foreach (var module in modulesToImport)
{
var s = module as string;
if (s != null)
{
_modulesToImport.Add(s.Trim());
ModuleSpecification moduleSpec = null;
if (ModuleSpecification.TryParse(s, out moduleSpec))
{
_modulesToImportInternal.Add(moduleSpec);
}
else
{
_modulesToImportInternal.Add(s.Trim());
}
}
}
}
break;
default:
{
Dbg.Assert(false, "Unknown option specified");
}
break;
}
}
private void CreateCollectionIfNecessary()
{
_modulesToImport ??= new List<string>();
_modulesToImportInternal ??= new List<object>();
}
private const string SessionConfigToken = "SessionConfigurationData";
internal const string ModulesToImportToken = "modulestoimport";
internal const string PrivateDataToken = "PrivateData";
internal const string InProcActivityToken = "InProcActivity";
private const string ParamToken = "Param";
private const string NameToken = "Name";
private const string ValueToken = "Value";
#endregion Private Members
}
}
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