Swashbuckle.aspnetcore: swagger route conflict with default http route in Asp.Net Core 2.0

[czihong]

I use "dotnet core new reactredux" to create my Asp.Net SPA application, everything go well before I introduce Swashbuckle to my project.

A after I installed Swashbuckle into my project (followed the Get-Start document), and I tried to access: http:127.0.0.1:5000/swagger/ , the browser don't show the API document. then I try to found out what is wrong here, because I use to successfully run Swashbuckle in my other Asp.Net Core project. and this is what I found:

the reason of swagger don't show up, is this code in Configure method of Startup.cs

          app.UseMvc(routes =>
            {
                routes.MapSpaFallbackRoute(
                    name: "spa-fallback",
                    defaults: new { controller = "Home", action = "Index" });
            });

if I comment out this code, and just use "app.UseMvc", it works.

    app.UseMvc();

the project is here: https://github.com/czihong/DotNetCoreFans/blob/master/Startup.cs

[dylanmckendry]

It looks like you solved the issue from your current Startup.cs file. Though for other users, you can fix it by adding the UseSwaggerUI above the UseMvc routing. I believe the MapSpaFallbackRoute is a catch all routing so it loads up the single page app when /swagger is used.

In version 1 of Swashbuckle I got around this issue by entering /swagger/index.htm but in version 2 you need to use the /swagger URL without the index.html.

app.UseSwagger();
app.UseSwaggerUI(c =>
{
    c.SwaggerEndpoint("/swagger/v1/swagger.json", "API V1");
});

app.UseMvc(routes =>
{
    routes.MapRoute(
        name: "default",
        template: "{controller=Home}/{action=Index}/{id?}");

    routes.MapSpaFallbackRoute(
        name: "spa-fallback",
        defaults: new { controller = "Home", action = "Index" });
});

[dmcweeney]

This got me too - moving the UseMvc route configuration after the UseSwaggerUI fixed it.