Requiring all parameters or return 404 - asp.net-mvc

Question

I am trying to require the user to input all parameters into the URL like this:
http://127.0.0.1:5000/api/movies/1?foo=a&bar=c
The browser displays;
1 a c
I would like to ensure that all parameters are included in the URL, and the other combinations of parameters would result in 404. How do I modify the code to do this?
using System.Linq;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.ApplicationModels;
using Microsoft.AspNetCore.Mvc.ActionConstraints;
using MoviesAPI.Services;
namespace MoviesAPI.Controllers
{
public interface IActionConstraint : IActionConstraintMetadata
{
/// <summary>
/// The constraint order.
/// </summary>
/// <remarks>
/// Constraints are grouped into stages by the value of <see cref="Order"/>. See remarks on
/// <see cref="IActionConstraint"/>.
/// </remarks>
/// <summary>
/// Determines whether an action is a valid candidate for selection.
/// </summary>
/// <param name="context">The <see cref="ActionConstraintContext"/>.</param>
/// <returns>True if the action is valid for selection, otherwise false.</returns>
bool Accept(ActionConstraintContext context);
}
public class RequiredFromQueryActionConstraint : IActionConstraint
{
private readonly string _parameter;
public RequiredFromQueryActionConstraint(string parameter)
{
_parameter = parameter;
}
public bool Accept(ActionConstraintContext context)
{
if (!context.RouteContext.HttpContext.Request.Query.ContainsKey(_parameter))
{
return false;
}
return true;
}
}
public class RequiredFromQueryAttribute : FromQueryAttribute, IParameterModelConvention
{
public void Apply(ParameterModel parameter)
{
if (parameter.Action.Selectors != null && parameter.Action.Selectors.Any())
{
parameter.Action.Selectors.Last().ActionConstraints.Add(new RequiredFromQueryActionConstraint(parameter.BindingInfo?.BinderModelName ?? parameter.ParameterName));
}
}
}
[Route("api/[controller]")]
public class MoviesController : Controller
{
private MoviesDbContext _context;
public MoviesController(MoviesDbContext context)
{
_context = context;
}
public IActionResult GetMovies()
{
return Ok(_context.Movies);
}
[HttpGet("{id}")]
public string Get(int id, [RequiredFromQuery]string foo, [RequiredFromQuery]string bar)
{
return id + " " + foo + " " + bar;
}
}
}

Answer 1

IActionConstraint Interface is included in Microsoft.AspNetCore.Mvc.ActionConstraints.
Remove your interface code and add the Order property for the RequiredFromQueryActionConstraint
public class RequiredFromQueryActionConstraint : IActionConstraint
{
private readonly string _parameter;
public RequiredFromQueryActionConstraint(string parameter)
{
_parameter = parameter;
}
public int Order => 999;
public bool Accept(ActionConstraintContext context)
{
if (!context.RouteContext.HttpContext.Request.Query.ContainsKey(_parameter))
{
return false;
}
return true;
}
}
public class RequiredFromQueryAttribute : FromQueryAttribute, IParameterModelConvention
{
public void Apply(ParameterModel parameter)
{
if (parameter.Action.Selectors != null && parameter.Action.Selectors.Any())
{
parameter.Action.Selectors.Last().ActionConstraints.Add(new RequiredFromQueryActionConstraint(parameter.BindingInfo?.BinderModelName ?? parameter.ParameterName));
}
}
}
Refer to https://www.strathweb.com/2016/09/required-query-string-parameters-in-asp-net-core-mvc/