public async Task <Response> HandleAsync(Request request, HttpContext context)
{
// required services
ICommandProvider commands = context.RequestServices.GetRequiredService <ICommandProvider>();
IUnauthorizedHandler unauthorized = context.RequestServices.GetRequiredService <IUnauthorizedHandler>();
Response response = new Response();
CommandContext ctx = null;
try
{
_logger.LogDebug($"Started to process a request '{request.Input}'.");
// command name entered by the user
string name = request.GetCommandName();
_logger.LogDebug($"Searching a command by the name '{name}'.");
// find the command by using the ICommandProvider service
ICommand cmd;
try
{
cmd = commands.Find(name, context);
}
catch (Exception e)
{
_logger.LogDebug($"An error occurred while searching a command by using the input '{request.Input}'.", e);
response.Messages.Add(ResponseMessage.Error(e.Message));
return(response);
}
_logger.LogDebug($"Found a command '{cmd.GetType().FullName}' that matches the name '{name}'.");
CommandInfo info = cmd.GetType().GetCommandInfo();
ctx = new CommandContext(context, request, response, info, cmd);
if (await IsAuthorizedAsync(ctx))
{
try
{
await ExecuteCommandAsync(ctx);
}
catch (UnauthorizedException)
{
// ...nope, command says unauthorized
await unauthorized.OnUnauthorizedAsync(ctx);
}
}
else
{
await unauthorized.OnUnauthorizedAsync(ctx);
}
}
catch (CommandParsingException e)
{
_logger.LogDebug($"An error occurred while parsing the input '{request.Input}'.", e);
ctx?.WriteError(e);
}
catch (Exception e)
{
_logger.LogError(e, $"An error occurred while processing the request with the input '{request.Input}'.");
if (ctx != null)
{
if (_options.DisplayExceptions)
{
ctx.WriteError(e, true);
}
else
{
ctx.WriteError("An error occurred, please check your application logs for more details.");
}
}
}
return(response);
}
public ElementProxy Find(string selector)
{
return(commandProvider.Find(selector));
}
