protected async Task Dispatch(HttpContext context, MethodInfo method, params object[] list)
{
Context = context;
_nestedParams = await context.SetupNestedParams();
if (RouteVars != null)
{
if (_nestedParams.ExtraParams == null)
{
_nestedParams.ExtraParams = new NestedDictionary();
}
foreach (var pair in RouteVars)
{
_nestedParams.ExtraParams.Set(pair.Key, pair.Value);
}
}
await BeforeDispatch.Invoke(this);
var ca = new ControllerArgs();
await BeforeAction.Invoke(this, ca);
if (ca.Cancel)
{
return;
}
var mParams = method.GetParameters();
// If no parameters are passed, try to infer them.
if (list.Length == 0 && mParams.Length > 0)
{
var newList = new object[mParams.Length];
var i = 0;
foreach (var mParam in mParams)
{
if (Params.ContainsKey(mParam.Name))
{
newList[i] = Params.Get(mParam.ParameterType, mParam.Name);
}
else
{
newList[i] = Type.Missing;
}
i++;
}
list = newList;
}
else if (list.Length < mParams.Length)
{
var newList = new object[mParams.Length];
for (var i = 0; i < mParams.Length; i++)
{
newList[i] = i > list.Length - 1 ? Type.Missing : list[i];
}
list = newList;
}
var response = await Utils.ExtractRefTask(method.Invoke(this, list));
if (response is HttpResponse hr)
{
Response.ContentType = hr.ContentType;
}
if (string.IsNullOrWhiteSpace(Response.ContentType))
{
Response.ContentType = "text/html; charset=utf-8";
}
await AfterAction.Invoke(this);
if (SessionAvailable)
{
await Session.CommitAsync();
}
object finalResponse;
if (response is HttpResponse http)
{
foreach (var pair in http.Headers)
{
Response.Headers[pair.Key] = pair.Value;
}
Response.StatusCode = http.StatusCode;
finalResponse = http.Body;
}
else
{
finalResponse = response;
}
switch (finalResponse)
{
case Stream stream:
if (!stream.CanRead)
{
throw new ArgumentException("Can't read HttpResponse stream");
}
if (stream.CanSeek)
{
stream.Seek(0, SeekOrigin.Begin);
}
await stream.CopyToAsync(Response.Body, 51200); // Copy in 50KB chunks
stream.Dispose();
break;
case string str:
await Response.WriteAsync(str);
break;
case byte[] bytea:
Response.Body = new MemoryStream(bytea);
break;
case null:
// Do nothing
break;
default:
if (IsJsonController)
{
var str = JsonSerializer.Serialize(finalResponse, JsonSettings);
await Response.WriteAsync(str);
}
else
{
await CleanUp();
throw new Exception(
$"Unknown response type from controller: {response.GetType().FullName} (in {GetType().FullName})");
}
break;
}
await CleanUp();
}