ASP.NET Core Web API runs locally but not on Azure app service

Question

I have been following this link exactly (https://learn.microsoft.com/en-us/aspnet/core/tutorials/first-web-api?view=aspnetcore-2.2&tabs=visual-studio) to create my web api.

**Locally, it is working fine. Tested the links and it returned JSON data

However, once I deploy my web api up to azure app service, all my api links have been returning me error 404. Is there anything that I might have missed out for routing?

In my controller I have added this to my head.

[Route("api/xxx")]
[ApiController]

In each function, I have added this

[HttpPut("xxx/{Id}")]

As for my program/startup it is totally the same as the tutorial

1. Program class

   public class Program
   {
      public static void Main(string[] args)
      {
           CreateWebHostBuilder(args).Build().Run();
       }
   
       public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
           WebHost.CreateDefaultBuilder(args)
               .UseStartup<Startup>();
   }
   

2. Startup.cs

       public void Configure(IApplicationBuilder app, IHostingEnvironment env)
   {
       if (env.IsDevelopment())
       {
           app.UseDeveloperExceptionPage();
       }
       else
       {
           // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
           app.UseHsts();
       }
   
       app.UseHttpsRedirection();
       app.UseMvc();
   }
   

   Let me know if you need anymore information. Really appreciate any help thanks!

Answer 1

Setting the web.config as below:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<system.webServer>
<handlers>
  <remove name="aspNetCore"/>
  <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified"/>
</handlers>
  <aspNetCore processPath="dotnet" arguments=".\Somerandomname.WebApi.dll" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" />
</system.webServer>

For more details, you could refer to this article. And here is Publish an ASP.NET Core Web API to an Azure App Services Web App you could follow.