相当于 Request.RequestURI 的 ASP.NET Core MVC 是什么？

Question

I found a blog post that shows how to "shim" familiar things like HttpResponseMessage back into ASP.NET Core MVC, but I want to know what's the new native way to do the same thing as the following code in a REST Post method in a Controller:

// POST audit/values
[HttpPost]
public System.Net.Http.HttpResponseMessage Post([FromBody]string value)
{
    var NewEntity = _repository.InsertFromString(value);

    var msg = new System.Net.Http.HttpResponseMessage(System.Net.HttpStatusCode.Created);
    msg.Headers.Location = new Uri(Request.RequestUri + NewEntity.ID.ToString());
    return msg;

}

In an ASP.NET Core MVC project, I can't seem to get Request.RequestUri.

I tried inspecting Request, and I was able to make a function like this:

private string UriStr(HttpRequest Request)
{
    return Request.Scheme + "://" + Request.Host + Request.Path; // Request.Path has leading /
}

So I could write UriStr(Request) instead. But I'm not sure that's right. I feel like I'm hacking my way around, and not using this correctly.

A related question for earlier non-Core ASP.NET MVC versions asks how to get the base url of the site.

Answer 1

Personally, I use :

new Uri(request.GetDisplayUrl())

• GetDisplayUrl fully un-escaped form (except for the QueryString)
• GetEncodedUrl - fully escaped form suitable for use in HTTP headers

These are extension method from the following namespace : Microsoft.AspNetCore.Http.Extensions

Answer 2

A cleaner way would be to use a UriBuilder :

private static Uri GetUri(HttpRequest request)
{
    var builder = new UriBuilder();
    builder.Scheme = request.Scheme;
    builder.Host = request.Host.Value;
    builder.Path = request.Path;
    builder.Query = request.QueryString.ToUriComponent();
    return builder.Uri;
}

(not tested, the code might require a few adjustments)

Answer 3

Here's a working code. This is based off @Thomas Levesque answer which didn't work well when the request is from a custom port.

public static class HttpRequestExtensions
{
    public static Uri ToUri(this HttpRequest request)
    {
        var hostComponents = request.Host.ToUriComponent().Split(':');

        var builder = new UriBuilder
        {
            Scheme = request.Scheme,
            Host = hostComponents[0],
            Path = request.Path,
            Query = request.QueryString.ToUriComponent()
        };

        if (hostComponents.Length == 2)
        {
            builder.Port = Convert.ToInt32(hostComponents[1]);
        }

        return builder.Uri;
    }
}