在Web API上调用post方法时获取404

Question

I have an API controller which have standard GET,POST and Delete actions.

[Route("api/[controller]")]
[ApiController]
public class UsersController : ControllerBase
{
    //Get
    [HttpPost]
    public async Task Post([FromBody] TestUser testUser, string tempPassword, role = "Guest")
    {

    }
}

Now I am adding a new action using:

[HttpPost]
[Route("api/[controller]/UpdateRole")]
public async Task Post(string email, List<string> roles)
{
}

When I am trying to call the API using postman ,

Type : POST Endpoint : http://localhost/api/users/UpdateRole

Request body:

{
    "email":"something@mail.com",
    "roles":["S1","s3"]
}

But I am getting a 404 as response back. On server I can see ,

the application completed without reading the entire request body.

Answer 1

It seems that your overall route is /api/Users/api/Users/UpdateRoute because of how RouteAttribute works.

[Route("a")]
public class MyController
{
    [Route("a/b")]
    public IActionResult MyAction()
    {
    }
}

The above will have a route of /a/a/b because the action route is appended to the controller route in this case.

Your options are:

• Change the controller route to [Route("[controller]/[action]")] and remove the action route, in which case the example above would become /MyController/MyAction
• Change the action route to simply [Route("b")] , in which case the full route would be a/b
• Use an absolute path for the action route [Route("/a/b")] , in which case the controller route would be ignored and the full route will simply be /a/b .

See here for more information about routing.

As for your issue with null values, ASP.NET Core is currently expecting email and roles as querystring parameters. Instead, you should create a model for your request body:

public class MyModel
{
    public string Email { get; set; }
    public List<string> Roles { get; set; }
}

And then change your action to accept it:

[HttpPost]
[Route("api/[controller]/UpdateRole")]
public async Task Post([FromBody]MyModel model)
{

}