System.Net.AutoWebProxyScriptEngine.EnsureEngineAvailable C# (CSharp) Method

        private AutoWebProxyState EnsureEngineAvailable(ref int syncStatus)
        {
            GlobalLog.Enter("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable");
            AutoWebProxyScriptWrapper newScriptInstance;

            if (state == AutoWebProxyState.Uninitialized || engineScriptLocation == null)
            {

                // Either Auto-Detect wasn't enabled or something failed with it.  Try the manual script location.
                if (automaticConfigurationScript != null)
                {
                    GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable() using automaticConfigurationScript:" + ValidationHelper.ToString(automaticConfigurationScript) + " engineScriptLocation:" + ValidationHelper.ToString(engineScriptLocation));
                    state = AutoWebProxyState.DiscoverySuccess;
                    if (automaticConfigurationScript.Equals(engineScriptLocation))
                    {
                        state = AutoWebProxyState.CompilationSuccess;
                        GlobalLog.Leave("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable", ValidationHelper.ToString(state));
                        return state;
                    }
                    state = DownloadAndCompile(automaticConfigurationScript, out newScriptInstance, ref syncStatus);
                    if (state == AutoWebProxyState.CompilationSuccess)
                    {
                        UpdateScriptInstance(newScriptInstance);
                        engineScriptLocation = automaticConfigurationScript;
                        GlobalLog.Leave("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable", ValidationHelper.ToString(state));
                        return state;
                    }
                }
            }
            else
            {
                // We always want to call DownloadAndCompile to check the expiration.
                GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable() state:" + state + " engineScriptLocation:" + ValidationHelper.ToString(engineScriptLocation));
                state = AutoWebProxyState.DiscoverySuccess;
                state = DownloadAndCompile(engineScriptLocation, out newScriptInstance, ref syncStatus);
                if (state == AutoWebProxyState.CompilationSuccess)
                {
                    UpdateScriptInstance(newScriptInstance);
                    GlobalLog.Leave("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable", ValidationHelper.ToString(state));
                    return state;
                }

                // There's still an opportunity to fail over to the automaticConfigurationScript.
                if (!engineScriptLocation.Equals(automaticConfigurationScript))
                {
                    GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable() Update failed.  Falling back to automaticConfigurationScript:" + ValidationHelper.ToString(automaticConfigurationScript));
                    state = AutoWebProxyState.DiscoverySuccess;
                    state = DownloadAndCompile(automaticConfigurationScript, out newScriptInstance, ref syncStatus);
                    if (state == AutoWebProxyState.CompilationSuccess)
                    {
                        UpdateScriptInstance(newScriptInstance);
                        engineScriptLocation = automaticConfigurationScript;
                        GlobalLog.Leave("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable", ValidationHelper.ToString(state));
                        return state;
                    }
                }
            }

            // Everything failed.  Set this instance to mostly-dead.  It will wake up again if there's a reg/connectoid change.
            GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable() All failed.");
            state = AutoWebProxyState.DiscoveryFailure;
            UpdateScriptInstance(null);
            engineScriptLocation = null;

            GlobalLog.Leave("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable", ValidationHelper.ToString(state));
            return state;
        }