Swagger UI not generating in azure .net core but it is working in local

Question

Swagger UI is not creating in a .net core application when deployed in azure but it is working perfectly in local

I have added this in

ConfigureServices(IServiceCollection services) methode in startup.cs

services.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1", new Info
{
Version = "v1",
Title = "API",
Description = "API"
});
});

and

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

env.ConfigureNLog("nlog.config");
loggerFactory.AddNLog();

app.UseSignalR(routes =>
{
  routes.MapHub<DashboardHub>("/hubs/dashboard");
});

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

app.UseSpa(spa =>
{
    spa.Options.SourcePath = "ClientApp";

    if (env.IsDevelopment())
    {
         spa.UseReactDevelopmentServer(npmScript: "start");
    }
});

in Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)

No error is getting and no json file is generated in the path {baseurl}/swagger/v1/swagger.json — Akhil
@SWilko Tried with c.RoutePrefix = string.Empty , but same issue not getting the UI page.Does this due to any configuration in azure? — Akhil

Eduardo Albarado Eduardo Albarado · Accepted Answer · 2020-03-16T14:08:07

Make sure the code isn't in IF conditional (env.IsDevelopment()). This the reason why only work on localhost. This avoids working in production time.

Take out the swagger initialization like the example.

            if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();

            // NOT HERE

        }

        // Enable middleware to serve generated Swagger as a JSON endpoint.  
        app.UseSwagger();

        // Enable middleware to serve swagger-ui (HTML, JS, CSS, etc.),  
        // specifying the Swagger JSON endpoint.  
        app.UseSwaggerUI(c =>
        {
            c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1");
            c.RoutePrefix = string.Empty;
        });

Swagger UI not generating in azure .net core but it is working in local

2 Answers