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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Formatting;
using System.Threading;
using System.Threading.Tasks;
using System.Web.Http.Controllers;
using System.Web.Http.Metadata;
using System.Web.Http.Validation;
namespace System.Web.Http.ModelBinding
{
/// <summary>
/// Parameter binding that will read from the body and invoke the formatters.
/// </summary>
public class FormatterParameterBinding : HttpParameterBinding
{
private IEnumerable<MediaTypeFormatter> _formatters;
public FormatterParameterBinding(HttpParameterDescriptor descriptor, IEnumerable<MediaTypeFormatter> formatters, IBodyModelValidator bodyModelValidator)
: base(descriptor)
{
Formatters = formatters;
BodyModelValidator = bodyModelValidator;
}
public override bool WillReadBody
{
get { return true; }
}
public IEnumerable<MediaTypeFormatter> Formatters
{
get { return _formatters; }
set
{
if (value == null)
{
throw Error.ArgumentNull("formatters");
}
_formatters = value;
}
}
public IBodyModelValidator BodyModelValidator
{
get;
set;
}
protected virtual Task<object> ReadContentAsync(HttpRequestMessage request, Type type, IEnumerable<MediaTypeFormatter> formatters, IFormatterLogger formatterLogger)
{
return request.Content.ReadAsAsync(type, formatters, formatterLogger);
}
public override Task ExecuteBindingAsync(ModelMetadataProvider metadataProvider, HttpActionContext actionContext, CancellationToken cancellationToken)
{
HttpParameterDescriptor paramFromBody = this.Descriptor;
Type type = paramFromBody.ParameterType;
HttpRequestMessage request = actionContext.ControllerContext.Request;
IFormatterLogger formatterLogger = new ModelStateFormatterLogger(actionContext.ModelState, paramFromBody.ParameterName);
Task<object> task = ReadContentAsync(request, type, _formatters, formatterLogger);
return task.Then(
(model) =>
{
// Put the parameter result into the action context.
string name = paramFromBody.ParameterName;
actionContext.ActionArguments.Add(name, model);
// validate the object graph.
// null indicates we want no body parameter validation
if (BodyModelValidator != null)
{
BodyModelValidator.Validate(model, type, metadataProvider, actionContext, paramFromBody.ParameterName);
}
});
}
}
}
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