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.NET Core (2.1) web API controller accepting all that follows within the request url as parameter

What I have is a .NET Core 2.1 web API controller (in the following the TestController) that should generate redirects to other urls when receiving GET requests.

Example:

The controller is called like: http://localhost/api/v1/Test/somedir/somesubdir/filename.extension

and it should return a redirect to https://example-domain.com/somedir/somesubdir/filename.extension

My example controller for this question looks like:

[Authorize]
[Route("api/v1/[controller]")]
public class TestController : ControllerBase
{
[HttpGet("{path}")]
public async Task<IActionResult> Get(string path)
{
//path e.g. is somedir/somesubdir/filename.extension
string prefix = "https://example-domain.com/api/v1/Other/";
//string path2 = HttpContext.Request.Path.Value.Replace("/api/v1/Test/", "/api/v1/Other/").Replace("%2F", "/");
return Redirect(prefix + path);
}
}


I don't get the routing to work. If I call the method with Swagger it get's called (with the slashes replaced by %2F) but at least it gets called.
If I call the controller via postman .NET Core just returns 404 Not Found.

I do not necessarily need the HttpGet("{path}"). I know that I could get the path like I assigned the path2 variable.

Any hints how I could get the routing right?

{*path}

3 Answers
3

You don't need to take "api/v1/Test" into account as your code comments suggest, it is already filtered out by the [Route] attribute on the Controller level.

"api/v1/Test"

For the rest of the path that follows you can use {*path}:

{*path}

[HttpGet("{*path}")]
public async Task<IActionResult> Get(string path)
{
const string prefix = "https://example-domain.com/api/v1/Other/";
return Redirect(prefix + path);
}


@john, his solution is wonderful: [HttpGet("{*path}")], just tested. but I want to keep my answer for feature use as an option:

[HttpGet("{*path}")]

don't use controller, and do it in global configure:

public class Startup
{
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
app.Map("api/v1/Test", x =>
{
x.Run(async context =>
{
//path e.g. is somedir/somesubdir/filename.extension
string prefix = "https://example-domain.com/api/v1/Other/";
string path = context.Request.Path.Value.Replace("/api/v1/Test/", "/api/v1/Other/").Replace("%2F", "/");
context.Response.Redirect(prefix + path);
});
});
}
}


I think you need to receive those 3 params separated as you have in your URL, so.. that method should be something like this...

[Route("{dir}/{subdir}/filename")]
public async Task<IActionResult> Get(string dir, string subdir, string filename)
{
string path = dir + "/" + subdir + "/" + filename;
//path e.g. is somedir/somesubdir/filename.extension
string prefix = "https://example-domain.com/api/v1/Other/";
//string path2 = HttpContext.Request.Path.Value.Replace("/api/v1/Test/", "/api/v1/Other/").Replace("%2F", "/");
return Redirect(prefix + path);
}


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