Default swagger index page not loading by default in Azure

user_954093 0
Viewed 519

I am working in a web api (.net 5.0) having swagger is enabled. Its working fine when running locally.

But after deploying into azure, its not loading the default page swagger/index.html by default. Instead page cannot be found (404) error is shown. But when I go to the page manually entering the URL its loading correctly and listing all the API end points.

So I went to the app service page and added a new default document in configuration like this

enter image description here

But nothing changed. Still the 404 error when we dont specify the swagger url.

What could be wrong??

swagger asp.net-core-webapi azure
2 Answers

One of the things i missed in the past , check your Startup.cs file especially the Configure() method.

Check if your code looks something like this:

if (env.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "Lotus.API.Integration v1"));
}

Move the Swagger configuration lines outside the if statement and it should work

user_17494030

This solved the issue - no need to touch the default documents in configuration in app service.

I updated following code in dotnet 6 Program.cs for development and non-development environment separately.

app.UseSwagger();
if (app.Environment.IsDevelopment())
{
    app.UseSwaggerUI();
}
if (!app.Environment.IsDevelopment())
{
    app.UseSwaggerUI(options =>
    {
        options.SwaggerEndpoint("/swagger/v1/swagger.json", "v1");
        options.RoutePrefix = string.Empty;
    });
}
user_35958050
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