using mono to host a asp.net owin webpage on the pi results in bad host

Question

While i was trying to port a owin asp.net website to the pi, (raspberry pi model b) I ended up with a website displaying the error page :

Bad Request (Invalid host)

On the pi i am running raspbian wheezy. I installed mono (version 3.2.8). For a simple console aplication mono works.

for the Owin website i made a console project in visual studio 2015.
To this console aplication i added the nuget packages :

Microsoft.Owin

Microsoft.Owin.Diagnostics

Microsoft.Owin.Host.HttpListner

Microsoft.Owin.Hosting

After that i added a Owin startup class. Within this class i added a few lines of code to display the current os":

public void Configuration(IAppBuilder app)
{
    app.UseWelcomePage(new Microsoft.Owin.Diagnostics.WelcomePageOptions()
    {
        Path = new PathString("/welcome")
    });

    app.Run(context =>
    {
        context.Response.ContentType = "text/plain";

        string output = string.Format(
            "I'm running on {0} nFrom assembly {1}",
            Environment.OSVersion,
            System.Reflection.Assembly.GetEntryAssembly().FullName
            );

        return context.Response.WriteAsync(output);

    });
}

Now i only needed to specify the base url of the project within the program class, id did this in the main function

    string baseUrl = "http://localhost:5000";
    using (WebApp.Start<Startup>(baseUrl))
    {
        Console.WriteLine("Press Enter to quit.");
        Console.ReadKey();

    }

With this code my project gives on startup a console view with the text

Press Enter to quit.

When i browse to

http://localhost:5000

The webpage gives the folowing output:

I'm running on Microsoft Windows NT 6.2.9200.0 nFrom assembly ConsoleApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null

however when I copy all my dll's and exe to my pi and execute the command

Mono ConsoleApplication1.exe

the pi gives the line Press Enter to quit. but when i browse to the ip of the pi with the port number 500, in my case

http://192.168.7.137:5000/

The webpage displayes Bad Request (Invalid host)

Answer 1

The problem was in the direction rtf_leg pointed me the localhost is not available when accecsing the website from the pi.

i only had to change the base url to the exact url of the pi. in my case http://192.168.7.137:5000.

this way the pi knew what to do when the url was accesed and the rusult shown was :

I'm running on Unix 3.18.7.0 nFrom assembly ConsoleApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null

:D

Answer 2

Try to replace:

http://localhost:5000 

to

http://*:5000