Mapping nested x-form-urlencoded data to DTO in Asp.NET Core

问题

Implementing a webhook in Asp.Net Core which is POSTed to with application/x-form-urlencoded data - it's receiving data in a format that is designed to be easily processable in PHP w/ the $_POST variable (nested associative array) - the form fields look like

foo
bar[barf]
baz[bat][bark]
baz[bat][bant]

Is there a nice (elegant and little code required) way to wire up the Asp.NET Core model binding to handle the nested structure here? i.e. when the webhook gets POSTed to, we parse a C# POCO -

something like

class RootDto {
    public string Foo {get; set;}

    public Bar Bar {get; set;}
    public Baz Baz {get; set;}

    public class Bar {
        public string Barf {get; set;}
    }

    public class Baz {
        public Bat Bat {get; set;}

        public class Bat {
            public string Bark {get; set;}
            public string Bant {get; set;}
        }
    }
}

The POST body looks something like the following:

foo=somevalue&bar%5Bbarf%5D=anothervalue&baz%5Bbat%5D%5Bbark%5D=123.0&baz%5Bbat%5D%5Bbant%5D=5000

i.e.

foo=somevalue&bar[barf]=anothervalue&baz[bat][bark]=123.0&baz[bat][bant]=5000

Also, what's the low-friction way to set up a type-converter for one of these fields (e.g. assume the field "Foo" comes in as a string but we want to parse it into a struct)?

Note that I don't have control of the shape or encoding of the data coming in from the webhook (e.g. I can't request they just send me JSON).

回答1:

Request body

Content-Type: application/x-www-form-urlencoded

foo=somevalue&bar%5Bbarf%5D=anothervalue&baz%5Bbat%5D%5Bbark%5D=123.0&baz%5Bbat%5D%5Bbant%5D=5000

It just works.... I have plain .net core project and controller looks like

  public IActionResult Post([FromForm] RootDto request)
        {
            return Ok(request);
        }

Btw your root class seems to be wrong I've changed to make it work

public class RootDto {
    public string Foo {get; set;}

    public BarClass Bar {get; set;}
    public BazClass Baz {get; set;}

    public class BarClass {
        public string Barf {get; set;}
    }

    public class BazClass {
        public BatClass Bat {get; set;}

        public class BatClass {
            public string Bark {get; set;}
            public string Bant {get; set;}
        }
    }
}

来源：https://stackoverflow.com/questions/48875360/mapping-nested-x-form-urlencoded-data-to-dto-in-asp-net-core

标签

asp.net-core

dto