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using System;
using System.Diagnostics;
using System.Security;
using System.Security.Permissions;
namespace DotNetOpenId.Loggers {
class TraceLogger : ILog {
TraceSwitch traceSwitch = new TraceSwitch("OpenID", "OpenID Trace Switch");
/// <summary>
/// Returns a new logger that uses the <see cref="System.Diagnostics.Trace"/> class
/// if sufficient CAS permissions are granted to use it, otherwise returns false.
/// </summary>
internal static ILog Initialize() {
return isSufficientPermissionGranted ? new TraceLogger() : null;
}
static bool isSufficientPermissionGranted {
get {
PermissionSet permissions = new PermissionSet(PermissionState.None);
permissions.AddPermission(new KeyContainerPermission(PermissionState.Unrestricted));
permissions.AddPermission(new ReflectionPermission(ReflectionPermissionFlag.MemberAccess));
permissions.AddPermission(new RegistryPermission(PermissionState.Unrestricted));
permissions.AddPermission(new SecurityPermission(SecurityPermissionFlag.ControlEvidence | SecurityPermissionFlag.UnmanagedCode | SecurityPermissionFlag.ControlThread));
var file = new FileIOPermission(PermissionState.None);
file.AllFiles = FileIOPermissionAccess.PathDiscovery | FileIOPermissionAccess.Read;
permissions.AddPermission(file);
try {
permissions.Demand();
return true;
} catch (SecurityException) {
return false;
}
}
}
#region ILog Members
public void Debug(object message) {
Trace.TraceInformation(message.ToString());
}
public void Debug(object message, Exception exception) {
Trace.TraceInformation(message + ": " + exception.ToString());
}
public void DebugFormat(string format, params object[] args) {
Trace.TraceInformation(format, args);
}
public void DebugFormat(string format, object arg0) {
Trace.TraceInformation(format, arg0);
}
public void DebugFormat(string format, object arg0, object arg1) {
Trace.TraceInformation(format, arg0, arg1);
}
public void DebugFormat(string format, object arg0, object arg1, object arg2) {
Trace.TraceInformation(format, arg0, arg1, arg2);
}
public void DebugFormat(IFormatProvider provider, string format, params object[] args) {
Trace.TraceInformation(format, args);
}
public void Info(object message) {
Trace.TraceInformation(message.ToString());
}
public void Info(object message, Exception exception) {
Trace.TraceInformation(message + ": " + exception.ToString());
}
public void InfoFormat(string format, params object[] args) {
Trace.TraceInformation(format, args);
}
public void InfoFormat(string format, object arg0) {
Trace.TraceInformation(format, arg0);
}
public void InfoFormat(string format, object arg0, object arg1) {
Trace.TraceInformation(format, arg0, arg1);
}
public void InfoFormat(string format, object arg0, object arg1, object arg2) {
Trace.TraceInformation(format, arg0, arg1, arg2);
}
public void InfoFormat(IFormatProvider provider, string format, params object[] args) {
Trace.TraceInformation(format, args);
}
public void Warn(object message) {
Trace.TraceWarning(message.ToString());
}
public void Warn(object message, Exception exception) {
Trace.TraceWarning(message + ": " + exception.ToString());
}
public void WarnFormat(string format, params object[] args) {
Trace.TraceWarning(format, args);
}
public void WarnFormat(string format, object arg0) {
Trace.TraceWarning(format, arg0);
}
public void WarnFormat(string format, object arg0, object arg1) {
Trace.TraceWarning(format, arg0, arg1);
}
public void WarnFormat(string format, object arg0, object arg1, object arg2) {
Trace.TraceWarning(format, arg0, arg1, arg2);
}
public void WarnFormat(IFormatProvider provider, string format, params object[] args) {
Trace.TraceWarning(format, args);
}
public void Error(object message) {
Trace.TraceError(message.ToString());
}
public void Error(object message, Exception exception) {
Trace.TraceError(message + ": " + exception.ToString());
}
public void ErrorFormat(string format, params object[] args) {
Trace.TraceError(format, args);
}
public void ErrorFormat(string format, object arg0) {
Trace.TraceError(format, arg0);
}
public void ErrorFormat(string format, object arg0, object arg1) {
Trace.TraceError(format, arg0, arg1);
}
public void ErrorFormat(string format, object arg0, object arg1, object arg2) {
Trace.TraceError(format, arg0, arg1, arg2);
}
public void ErrorFormat(IFormatProvider provider, string format, params object[] args) {
Trace.TraceError(format, args);
}
public void Fatal(object message) {
Trace.TraceError(message.ToString());
}
public void Fatal(object message, Exception exception) {
Trace.TraceError(message + ": " + exception.ToString());
}
public void FatalFormat(string format, params object[] args) {
Trace.TraceError(format, args);
}
public void FatalFormat(string format, object arg0) {
Trace.TraceError(format, arg0);
}
public void FatalFormat(string format, object arg0, object arg1) {
Trace.TraceError(format, arg0, arg1);
}
public void FatalFormat(string format, object arg0, object arg1, object arg2) {
Trace.TraceError(format, arg0, arg1, arg2);
}
public void FatalFormat(IFormatProvider provider, string format, params object[] args) {
Trace.TraceError(format, args);
}
public bool IsDebugEnabled {
get { return traceSwitch.TraceVerbose; }
}
public bool IsInfoEnabled {
get { return traceSwitch.TraceInfo; }
}
public bool IsWarnEnabled {
get { return traceSwitch.TraceWarning; }
}
public bool IsErrorEnabled {
get { return traceSwitch.TraceError; }
}
public bool IsFatalEnabled {
get { return traceSwitch.TraceError; }
}
#endregion
}
}
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