private void LoadConfiguration(string configFilePath)
{
XPathNavigator navigator = GetNavigator(configFilePath);
string overallTimeoutString = navigator.SelectSingleNode(OverallTimeoutValueXPath).Value;
if (string.IsNullOrEmpty(overallTimeoutString) || (!int.TryParse(overallTimeoutString, out _overallTimeoutSeconds)))
{
LogUtils.WriteTrace(DateTime.UtcNow, "OverallTimeout value is not defined or is not a valid integer value. OverallTimeout = " +
(string.IsNullOrEmpty(overallTimeoutString) ? "null" : overallTimeoutString));
throw new InvalidOperationException(
"OverallTimeout value is not defined or is not a valid integer value. OverallTimeout = " +
(string.IsNullOrEmpty(overallTimeoutString) ? "null" : overallTimeoutString));
}
if (_overallTimeoutSeconds < 0)
{
LogUtils.WriteTrace(DateTime.UtcNow, "OverallTimeout value cannot be less than 0. OverallTimeout = " +
overallTimeoutString);
throw new InvalidOperationException(
"OverallTimeout value cannot be less than 0. OverallTimeout = " +
overallTimeoutString);
}
// Loop through all patches
XPathNodeIterator nodeIterator = navigator.Select(PatchXPath);
while (nodeIterator.MoveNext())
{
Patch patch = new Patch();
// Read name
if (nodeIterator.Current.SelectSingleNode("@name") == null)
{
LogUtils.WriteTrace(DateTime.UtcNow, "name attribute needed for Patch element");
throw new InvalidOperationException("name attribute needed for Patch element");
}
patch.Name = nodeIterator.Current.SelectSingleNode("@name").Value.Trim();
if (string.IsNullOrEmpty(patch.Name))
{
LogUtils.WriteTrace(DateTime.UtcNow, "name attribute can't be empty for Patch element");
throw new InvalidOperationException("name attribute can't be empty for Patch element");
}
if (_patchMap.ContainsKey(patch.Name))
{
LogUtils.WriteTrace(DateTime.UtcNow, string.Format(CultureInfo.InvariantCulture, "Patch '{0}' is defined in multiple places.", patch.Name));
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "Patch '{0}' is defined in multiple places.", patch.Name));
}
// Read OS versions the patch applies to and check whether it is applicable to current OS version
if (nodeIterator.Current.SelectSingleNode("@appliesToOsVersion") != null)
{
string osVersionAppliesTo = string.Empty;
try
{
bool invalidVersionFormat = false;
osVersionAppliesTo = nodeIterator.Current.SelectSingleNode("@appliesToOsVersion").Value.Trim();
Version currentOsVersion = Environment.OSVersion.Version;
char[] versionDelimiter = new char[] { '.' };
string[] versionComponents = osVersionAppliesTo.Split(versionDelimiter);
string[] currentOsVersionComponents = currentOsVersion.ToString().Split(versionDelimiter);
// OS version the patch applies to should have four components: major.minor.build.revision
if (versionComponents.Length != 4)
{
invalidVersionFormat = true;
}
else
{
// Each version component should be an integer or a wildcard character '*'
foreach (string t in versionComponents)
{
int versionComponent;
if (t.Equals("*", StringComparison.OrdinalIgnoreCase) || int.TryParse(t, out versionComponent))
{
continue;
}
invalidVersionFormat = true;
break;
}
}
if (invalidVersionFormat)
{
LogUtils.WriteTrace(DateTime.UtcNow, string.Format(
@"PathUtil: Invalid version format for OS version patch {0} applies to : {1}; the patch will be installed",
patch.Name,
osVersionAppliesTo));
}
else
{
bool skipPatch = false;
for (int i = 0; i < Math.Min(versionComponents.Length, currentOsVersionComponents.Length); i++)
{
if (!versionComponents[i].Equals("*", StringComparison.OrdinalIgnoreCase) &&
!versionComponents[i].Equals(currentOsVersionComponents[i], StringComparison.OrdinalIgnoreCase))
{
skipPatch = true;
}
}
// If the patch is not applicable to current OS version, skip it
if (skipPatch)
{
LogUtils.WriteTrace(DateTime.UtcNow, string.Format(
@"PatchUtil: Patch {0} will be skipped since it is only applicable to OS version {1} while current OS version is {2}",
patch.Name,
osVersionAppliesTo,
currentOsVersion));
continue;
}
}
}
catch (Exception e)
{
LogUtils.WriteTrace(DateTime.UtcNow, string.Format(
@"PathUtil: Exception occurred when checking whether patch {0} (applicable to OS version {1}) is applicable to current OS version, skip version checking and continue installing : {2}",
patch.Name,
osVersionAppliesTo,
e));
}
}
// Read command line.
if (nodeIterator.Current.SelectSingleNode(CommandLineXPath) == null)
{
LogUtils.WriteTrace(DateTime.UtcNow, string.Format(CultureInfo.InvariantCulture, "Command value attribute needed for Patch '{0}'.", patch.Name));
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "Command value attribute needed for Patch '{0}'.", patch.Name));
}
patch.CommandLine = nodeIterator.Current.SelectSingleNode(CommandLineXPath).Value.Trim();
if (string.IsNullOrEmpty(patch.CommandLine))
{
LogUtils.WriteTrace(DateTime.UtcNow, string.Format(CultureInfo.InvariantCulture, "Command value can't be empty for Patch '{0}'.", patch.Name));
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "Command value can't be empty for Patch '{0}'.", patch.Name));
}
// Read log path (optional element).
patch.LogFolderPath = null;
if (nodeIterator.Current.SelectSingleNode(LogFolderPathXPath) != null)
{
string logFolderPath = nodeIterator.Current.SelectSingleNode(LogFolderPathXPath).Value.Trim();
if (!string.IsNullOrEmpty(logFolderPath))
{
patch.LogFolderPath = logFolderPath;
}
}
// Read registry settings
List <PatchRegistry> registrySettings = new List <PatchRegistry>();
XPathNodeIterator iterator = nodeIterator.Current.Select(PatchRegistryXPath);
while (iterator.MoveNext())
{
string keyName = ReadPatchRegistryAttribute(iterator, patch.Name, RegistryKeyNameAttribute, true);
string valueName = ReadPatchRegistryAttribute(iterator, patch.Name, RegistryValueNameAttribute, true);
string expectedValue = ReadPatchRegistryAttribute(iterator, patch.Name, RegistryExpectedValueAttribute, false);
PatchRegistry registrySetting = new PatchRegistry
{
RegistryKeyName = keyName,
RegistryValueName = valueName,
ExpectedValue = expectedValue,
};
registrySettings.Add(registrySetting);
}
// We need at least one registry setting to confirm the patch is installed.
if (!registrySettings.Any())
{
LogUtils.WriteTrace(DateTime.UtcNow, string.Format(CultureInfo.InvariantCulture, "There is no registry setting found for Patch '{0}'", patch.Name));
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "There is no registry setting found for Patch '{0}'", patch.Name));
}
patch.RegistrySettings = registrySettings;
_patchMap.Add(patch.Name, patch);
}
}
/// <summary>
/// Get uninstalled patches list
/// </summary>
/// <param name="patchConfiguration"></param>
/// <returns></returns>
private static IList <PatchConfiguration.Patch> GetUninstalledPatches(PatchConfiguration patchConfiguration)
{
List <PatchConfiguration.Patch> uninstalledPatches = new List <PatchConfiguration.Patch>();
foreach (PatchConfiguration.Patch patch in patchConfiguration.PatchMap.Values)
{
LogUtils.WriteTrace(DateTime.UtcNow,
string.Format("PatchUtil: check registry setting for patch '{0}'", patch.Name));
if (patch.RegistrySettings == null)
{
continue;
}
foreach (PatchConfiguration.PatchRegistry reg in patch.RegistrySettings)
{
LogUtils.WriteTrace(DateTime.UtcNow, string.Format(@"PatchUtil: read registry value '{0}\{1}' for patch '{2}'",
reg.RegistryKeyName, reg.RegistryValueName, patch.Name));
object value = Registry.GetValue(reg.RegistryKeyName, reg.RegistryValueName, null);
if (value == null)
{
LogUtils.WriteTrace(DateTime.UtcNow,
string.Format(
@"PatchUtil: registry value '{0}\{1}' does not exist or has null value. Need to install patch '{2}'",
reg.RegistryKeyName, reg.RegistryValueName, patch.Name));
// PatchConfiguration doesn't allow the same patch be defined multiple times. No need to check it here again.
uninstalledPatches.Add(patch);
// Go to next patch
break;
}
// Compare registry value. We only support REG_DWORD and REG_SZ for now
Type valueType = value.GetType();
if (valueType == typeof(string))
{
string stringValue = value as string;
LogUtils.WriteTrace(DateTime.UtcNow,
string.Format(
@"PatchUtil: registry value '{0}\{1}' has string value: '{2}'",
reg.RegistryKeyName, reg.RegistryValueName, stringValue));
// If reg.ExpectedValue is null, we only validate there is a reg value there.
if (reg.ExpectedValue == null)
{
LogUtils.WriteTrace(DateTime.UtcNow, @"PatchUtil: skip validation because the ExpectedValue is null");
}
else if (!string.Equals(stringValue, reg.ExpectedValue, StringComparison.OrdinalIgnoreCase))
{
LogUtils.WriteTrace(DateTime.UtcNow, string.Format(
@"PatchUtil: registry value '{0}\{1}' does not match the expected value: '{2}'. Need to install patch '{3}'",
reg.RegistryKeyName,
reg.RegistryValueName,
reg.ExpectedValue,
patch.Name));
// Add to the list
uninstalledPatches.Add(patch);
// Go to next patch
break;
}
}
else if (valueType == typeof(int))
{
int intValue = (int)value;
LogUtils.WriteTrace(DateTime.UtcNow, string.Format(@"PatchUtil: registry value '{0}\{1}' has integer value: '{2}'",
reg.RegistryKeyName, reg.RegistryValueName, intValue));
int expectedValue;
if (reg.ExpectedValue == null)
{
LogUtils.WriteTrace(DateTime.UtcNow, @"PatchUtil: skip validation because the ExpectedValue is null");
}
else if ((!int.TryParse(reg.ExpectedValue, out expectedValue)) || (expectedValue != intValue))
{
LogUtils.WriteTrace(DateTime.UtcNow, string.Format(
@"PatchUtil: registry value '{0}\{1}' does not match the expected value: '{2}'. Need to install patch '{3}'",
reg.RegistryKeyName,
reg.RegistryValueName,
reg.ExpectedValue,
patch.Name));
// Add to the list
uninstalledPatches.Add(patch);
// Go to next patch
break;
}
}
else
{
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "PatchUtil: Registry value type '{0}' is not supported.", valueType));
}
}
}
return(uninstalledPatches);
}