internal static object[] BindParameter(IDictionary<string, object> environment, IIMOwinOptions options, ValueProvider valueProvider, ParameterInfoSlim[] arguments)
{
var methodParameters = new object[arguments.Length];
for (var i = 0; i < arguments.Length; i++)
{
var item = arguments[i];
var _values = valueProvider.GetValue(item.Name);
var value = _values as string;
var values = _values as List<string>;
var isEmpty = _values == null;
if (isEmpty && !item.ParameterTypeIsArray)
{
if (item.IsOptional)
{
methodParameters[i] = item.DefaultValue;
continue;
}
if (!item.ParameterTypeIsString && (item.ParameterTypeIsClass || item.ParameterTypeIsNullable))
{
methodParameters[i] = null;
continue;
}
environment.EmitBadRequest();
return null;
}
if (!item.ParameterTypeIsArray)
{
var conv = TypeBinder.GetConverter(item.ParameterType);
if (conv == null) throw new InvalidOperationException("critical:register code is broken");
object pValue;
if (value != null && conv(value, out pValue))
{
methodParameters[i] = pValue;
continue;
}
if (item.IsOptional)
{
methodParameters[i] = item.DefaultValue;
continue;
}
if (!item.ParameterTypeIsString && (item.ParameterTypeIsClass || item.ParameterTypeIsNullable))
{
methodParameters[i] = null;
continue;
}
environment.EmitBadRequest();
return null;
}
var arrayConv = TypeBinder.GetArrayConverter(item.ParameterType);
if (arrayConv == null) throw new InvalidOperationException("critical:register code is broken");
methodParameters[i] = arrayConv(values ?? ((value != null) ? new[] { value } : (IList<string>)new string[0]));
}
return methodParameters;
}
public async Task ProcessRequest(IDictionary<string, object> environment)
{
MemoryStream bufferedRequestStream = null;
var originalRequestStream = environment.AsRequestBody();
if (!originalRequestStream.CanSeek)
{
bufferedRequestStream = new MemoryStream();
if (this._options.StreamWriteOption == StreamWriteOption.BufferAndAsynchronousWrite)
// keep context
await originalRequestStream.CopyToAsync(bufferedRequestStream);
else
originalRequestStream.CopyTo(bufferedRequestStream);
bufferedRequestStream.Position = 0;
environment[OwinConstants.RequestBody] = bufferedRequestStream;
}
try
{
AcceptVerbs verb;
var handler = SelectHandler(environment.AsRequestPath(), environment, out verb);
if (handler == null) return;
// parameter binding
var valueProvider = new ValueProvider(environment, verb);
var methodParameters = ParameterBinder.BindParameter(environment, _options, valueProvider, handler.Arguments);
if (methodParameters == null) return;
var contentFormatter = _options.ContentFormatter;
try
{
var context = new OperationContext(environment, handler.ClassName, handler.MethodName)
{
Parameters = methodParameters,
ParameterNames = handler.ParameterNames,
Attributes = handler.AttributeLookup,
ContentFormatter = contentFormatter,
};
// invoker
await handler.Execute(_options, context).ConfigureAwait(false);
}
catch (Exception ex)
{
if (IsRethrowOrEmitException(_options, environment, ex)) throw;
}
}
finally
{
if (bufferedRequestStream != null)
bufferedRequestStream.Dispose();
environment[OwinConstants.RequestBody] = originalRequestStream;
}
}
