ASP.NET Core 2.2 Web API Angular. Hosting provider says 500 - Internal server error

Question

I am trying to publish ASP.NET Core 2.2 Web API and Angular 8 project with a hosting provider SmarterASP.NET that supports ASP.NET Core. However, I am getting the following error:

500 - Internal server error. There is a problem with the resource you are looking for, and it cannot be displayed.

However, the project works perfectly if I start it locally.

I searched through the Internet and various forums and see this question, another one question and this github post.

This is my Main method:

public class Program
{
    public static void Main(string[] args)
    {
        var host = CreateWebHostBuilder(args).Build();
        WebHost.CreateDefaultBuilder(args)
            .UseSetting(WebHostDefaults.DetailedErrorsKey, "true");

        host.Run();
    }
}

This is my Configure() of StartUp class:

public void Configure(IApplicationBuilder app, IHostingEnvironment env, 
    IServiceProvider provider)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseHsts();
    }       
    app.Use(async (context, next) =>
    {
        await next();
        if (context.Response.StatusCode == 404 && 
            !Path.HasExtension(context.Request.Path.Value))
        {
            context.Request.Path = "/index.html";
            await next();
        }
    });     
    app.ConfigureCustomExceptionMiddleware();
    app.UseCors("ApiCorsPolicy");
    app.UseDefaultFiles();
    app.UseStaticFiles();
    app.UseStaticFiles(new StaticFileOptions()
    {
        FileProvider = new PhysicalFileProvider(
            Path.Combine(Directory.GetCurrentDirectory(), @"StaticFiles")),
            RequestPath = new PathString("/StaticFiles")
    });
    app.UseHttpsRedirection();
    app.UseAuthentication();
    app.UseMvc();
    app.UseDeveloperExceptionPage();
}

And this is my web.config file:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <location path="." inheritInChildApplications="false">
    <system.webServer>
      <httpErrors errorMode="Detailed" />
      <aspNetCore processPath="dotnet">
      <environmentVariables>
           <environmentVariable name="ASPNETCORE_DETAILEDERRORS" value="true" />
           </environmentVariables>
      </aspNetCore>
      <handlers>
        <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" 
            resourceType="Unspecified" />
      </handlers>
      <aspNetCore processPath="dotnet" arguments=".\fooappl.dll" stdoutLogEnabled="true" 
          stdoutLogFile=".\logs\stdout" hostingModel="InProcess" />
    </system.webServer>
  </location>
  <system.web>
    <customErrors mode="Off"/>
  </system.web>
</configuration>
<!--ProjectGuid: 25e0e882-c3ff-4f8d-98cc-f26a692fa019-->

I've created folders logs\stdout, however, logs file were not created.

I am little bit stuck. Could you say what am I doing wrong?

Update it to 'app.UseDeveloperExceptionPage();' even when in prod or check logs to get some more detailed info on whats goes wrong. You no longer need a web.config file. Try removing that and see what effect it has. — CountZero, May 21 '20 at 08:29
@CountZero thank you for your comment! However, I already have `app.UseDeveloperExceptionPage();` at the bottom of `Configure()` method. Do you want to move it after `app.UseHsts();` code? — Learner, May 21 '20 at 08:46
Maybe move it to the top, often ordering is important when configuring middleware. Try removing the web config altogether - not usually required on .net core apps. Can you check logs on your hosting provider to see if there are more detailed exception detauils. — CountZero, May 21 '20 at 09:03
@CountZero **Maybe move it to the top** - ok, I did it, however the error is still the same. **Try removing the web config altogether** ok, I did it and error now says `403 - Forbidden: Access is denied. You do not have permission to view this directory or page using the credentials that you supplied.` **Can you check logs on your hosting provider to see if there are more detailed exception detauils**- there are no errors in `logs\stdout` folder. — Learner, May 21 '20 at 09:26
There are some good instruction to read here. https://www.smarterasp.net/support/kb/a1775/asp_net-core-hosting.aspx You don't need a web.config unless you want IIS acting as a proxy - I'd avoid it unless you need the featured. — CountZero, May 21 '20 at 09:35
Remove the 'app.UseAuthentication();' and the last error should go away. — CountZero, May 21 '20 at 09:37
@CountZero **Remove the 'app.UseAuthentication();' ** thanks for advice, however the error is still the same `403 - Forbidden: Access is denied. You do not have permission to view this directory or page using the credentials that you supplied.` — Learner, May 21 '20 at 10:01
Could be lots of things. When I end up in this situation I reduce the app down to the most simple one possible then add functionality until I find the thing causing the issues. Try deploying a hello world app and see if that works. Then add your features until it breaks. Can you deploy and run this example? https://learn.microsoft.com/en-us/visualstudio/ide/quickstart-aspnet-core?view=vs-2019 — CountZero, May 21 '20 at 10:24
@CountZero thank you man, I will try to do it. I am just wondering how errors could be shown as it will help to know the origin or the error — Learner, May 21 '20 at 10:45
We've made some progress - you know you're getting a 403 - the question is - is it your application sending that out or some setting on your hosting provider. — CountZero, May 21 '20 at 11:27
Remove both of these from ConfigureServices too if present AddAuthentication AddAuthorization — CountZero, May 21 '20 at 11:28
Also check in the control panel of your hosting provider and see if there are any auth settings in there that might be causing it. — CountZero, May 21 '20 at 11:29
@CountZero thank you for your kindness. You are very cool! Thanks! As there is no answer, I just upvoted your answers. **Remove both of these from ConfigureServices too if present AddAuthentication AddAuthorization** I will try to do it — Learner, May 21 '20 at 12:10
@CountZero ooops, now I have `HTTP Error 403.14 - Forbidden`. Maybe you have some thoughts? Thanks! — Learner, May 21 '20 at 13:01

score 3 · Answer 1 · answered May 21 '20 at 09:08

3

I got similar type of problem and i fixed this by providing complete path of dotnet exe in config file. update process path according to your server path:

<aspNetCore processPath="C:\Program Files\dotnet\dotnet.exe" arguments=".\fooappl.dll" stdoutLogEnabled="true" 
      stdoutLogFile=".\logs\stdout" hostingModel="InProcess" />

Try once!

answered May 21 '20 at 09:08

Always_a_learner

1,254
1
8
16

Thank you for your answer. However, it is not my web server, it is [smarterasp hosting](https://www.smarterasp.net/), so I do not know the exact `processPath`. Maybe you have other suggestions? – Learner May 21 '20 at 09:19
1

you should raise a support ticket with service provider then. – Always_a_learner May 21 '20 at 09:21
Yeah, you were right. I've raised the ticket and support helped me! Thanks! – Learner May 22 '20 at 18:46
I upvoted to your answer and wrote errors that should be eliminated. Thanks! – Learner May 23 '20 at 10:01

Learner · Accepted Answer · 2020-05-23T18:50:03.330

I've managed to deploy my application! Maybe it will help to others.

So my mistakes were:

Not correct web.config. Thanks to guys from SmarterAsp.Net! This is the correct web.config which shows detailed error:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <location path="." inheritInChildApplications="false">
    <system.webServer>
        <handlers>
            <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" 
                resourceType="Unspecified" />
        </handlers>
        <aspNetCore processPath="dotnet" arguments=".\yourAppl.dll" 
            stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" 
            hostingModel="InProcess" >
            <environmentVariables>
                <environmentVariable name="ASPNETCORE_ENVIRONMENT" 
                    value="Development" />
            </environmentVariables>     
         </aspNetCore>
      </system.webServer>
   </location>
</configuration>
<!--ProjectGuid: 25e0e882-c3ff-4f8d-98cc-f26a692fa019-->

After web.config was fixed, then detailed errors are shown. And error was FileNotFoundException. The reason was that Directory.GetCurrentDirectory() works incorrectly.

So I've changed code to:

private IHostingEnvironment _env;

public Startup(IConfiguration configuration, IHostingEnvironment env)
{
    Configuration = configuration;
    _env = env;
}

public void Configure(IApplicationBuilder app, IHostingEnvironment env, IServiceProvider provider)
{   
    // The other code is omitted for the brevity
    app.UseStaticFiles(new StaticFileOptions()
    {                
        FileProvider = new PhysicalFileProvider(Path.Combine(_env.ContentRootPath, @"StaticFiles")),
        RequestPath = new PathString(Path.Combine(_env.ContentRootPath, "/StaticFiles"))
    });
}

I've added folder wwwroot inside of my ASP.NET Core 2.2 application and put Angular prod bundle into it

If somebody would need a guide how to deploy from Visual Studio

score 1 · Answer 3 · answered May 22 '20 at 18:19

1

Try removing hostingModel="InProcess" from your web.config file.

answered May 22 '20 at 18:19

Mert Karakaya

11
2

ASP.NET Core 2.2 Web API Angular. Hosting provider says 500 - Internal server error

3 Answers3