IdentityServer3

The validation middleware uses the standard Katana logging facilities.

By default Katana uses the TraceSource mechanism in .NET for logging. Add the following snippet to your config file to enable logging to a file:

<system.diagnostics>
  <trace autoflush="true" />

  <sources>
    <source name="Microsoft.Owin">
      <listeners>
        <add name="KatanaListener" />
      </listeners>
    </source>
  </sources>

  <sharedListeners>
    <add name="KatanaListener"
          type="System.Diagnostics.TextWriterTraceListener"
          initializeData="katana.trace.log"
          traceOutputOptions="ProcessId, DateTime" />
  </sharedListeners>

  <switches>
    <add name="Microsoft.Owin"
          value="Verbose" />
  </switches>
</system.diagnostics>