CODEWITHSUNDEEP
azure-devopsswaggerswagger-ui
Kirsten
Kirsten

Reputation: 18188

Failed to load API definition Fetch Error, when deployed but fine on localhost

I am upgrading my api from netcore2.1 to 3.1

When I run on localhost the UI works fine.

When I deploy via Azure DevOps and go to the myapplication/myapi/swagger.html url I get

Failed to load API definition 
Fetch Error
Service Unavailable /myapi/swagger/v1/swagger/json

Yet I can see the json at 

myapplication/myapi/swagger/v1/swagger.json

I have the following 

   public static IApplicationBuilder UseSwaggerDocumentation(this IApplicationBuilder app)
    {
        app.UseSwagger(c =>

            c.RouteTemplate = "myapi/swagger/{documentName}/swagger.json"
        );

        app.UseSwaggerUI(c =>
        {

            c.SwaggerEndpoint("/myapi/swagger/v1/swagger.json", "Versioned API v1.0");

            c.RoutePrefix = "myapi/swagger";

        });

        return app;
    }

I am using 

Swashbuckle.AspNetCore (5.2.0)

Upvotes: 0

Views: 4664

Answers (1)

Kirsten
Kirsten

Reputation: 18188

I found the following worked. 

    public static IApplicationBuilder UseSwaggerDocumentation(this IApplicationBuilder app)
    {
        app.UseSwagger(c =>

            c.RouteTemplate = "myapi/{documentName}/swagger.json"
        );

        app.UseSwaggerUI(c =>
        {

            c.SwaggerEndpoint("./v1/swagger.json", "Versioned API v1.0");

            c.RoutePrefix = "myapi";

        });

        return app;
    }

The docs state

If using directories with IIS or a reverse proxy, set the Swagger endpoint to a relative path using the ./ prefix. For example, ./swagger/v1/swagger.json. Using /swagger/v1/swagger.json instructs the app to look for the JSON file at the true root of the URL (plus the route prefix, if used). For example, use http://localhost://swagger/v1/swagger.json instead of http://localhost:///swagger/v1/swagger.json.

However unfortunately my solution doesn't work with Autorest. Thus I asked another question

Upvotes: 1

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