How to specify the host

[luebken]

Mono / Nancy seems to require set the hostname. But if I hardcoded it:

            var port = 8080;
            var nancyHost = new NancyHost(new Uri("http://nancy-luebken.gigantic.io:" + port));
            nancyHost.Start();

I can't bind it:

2015-06-11 09:41:18.894 +0000 UTC    - docker  - Status: Image is up to date for registry.giantswarm.io/luebken/nancy:latest
2015-06-11 09:41:20.579 +0000 UTC    - docker  - Unhandled Exception:
2015-06-11 09:41:20.58 +0000 UTC     - docker  - at System.Net.EndPointListener..ctor (System.Net.IPAddress addr, Int32 port, Boolean secure) [0x00000] in <filename unknown>:0
2015-06-11 09:41:20.58 +0000 UTC     - docker  - at System.Net.Sockets.Socket.Bind (System.Net.EndPoint local_end) [0x00000] in <filename unknown>:0
2015-06-11 09:41:20.58 +0000 UTC     - docker  - System.Net.Sockets.SocketException: The requested address is not valid in this context
2015-06-11 09:41:20.58 +0000 UTC     - docker  - at System.Net.EndPointManager.GetEPListener (System.String host, Int32 port, System.Net.HttpListener listener, Boolean secure) [0x00000] in <filename unknown>:0
2015-06-11 09:41:20.581 +0000 UTC    - docker  - at System.Net.EndPointManager.AddListener (System.Net.HttpListener listener) [0x00000] in <filename unknown>:0
2015-06-11 09:41:20.581 +0000 UTC    - docker  - at System.Net.EndPointManager.AddPrefixInternal (System.String p, System.Net.HttpListener listener) [0x00000] in <filename unknown>:0
2015-06-11 09:41:20.582 +0000 UTC    - docker  - at System.Net.Sockets.Socket.Bind (System.Net.EndPoint local_end) [0x00000] in <filename unknown>:0
2015-06-11 09:41:20.582 +0000 UTC    - docker  - [ERROR] FATAL UNHANDLED EXCEPTION: System.Net.Sockets.SocketException: The requested address is not valid in this context
2015-06-11 09:41:20.582 +0000 UTC    - docker  - at System.Net.EndPointListener..ctor (System.Net.IPAddress addr, Int32 port, Boolean secure) [0x00000] in <filename unknown>:0
2015-06-11 09:41:20.583 +0000 UTC    - docker  - at System.Net.EndPointManager.AddPrefixInternal (System.String p, System.Net.HttpListener listener) [0x00000] in <filename unknown>:0
2015-06-11 09:41:20.583 +0000 UTC    - docker  - at System.Net.EndPointManager.GetEPListener (System.String host, Int32 port, System.Net.HttpListener listener, Boolean secure) [0x00000] in <filename unknown>:0
2015-06-11 09:41:20.584 +0000 UTC    - docker  - at System.Net.EndPointManager.AddListener (System.Net.HttpListener listener) [0x00000] in <filename unknown>:0

swarm.json see:
https://github.com/luebken/nancy-demo-hosting-docker/blob/swarmify/swarm.json

[zeisss]

If thats the adress to bind to, you can use "0.0.0.0:" + port

[zeisss]

btw, he cannot bind to that adress because the DNS lookup for that hostnames gives the IP of our loadbalancer and no local network interface has that IP.

[luebken]

I can not use "0.0.0.0" since http://nancyfx.org/ is looking at the Host header and cant match it. See for example the workaround for curl & boot2docker where I need to explicity pass the host header:
$ curl -H "Host: 0.0.0.0:8080" $(boot2docker ip):8080
https://github.com/BenHall/nancy-demo-hosting-docker/blob/master/README.md

[zeisss]

I guess you need to configure the host value of the bootstrapper slightly. Maybe https://github.com/NancyFx/Nancy/wiki/Self-Hosting-Nancy helps? I can't find any API documentation :(

[luebken]

Could be. I tried to set fool around with HostConfiguration but my none existing C# knowledge doesn't help. ;-)

This:

namespace Nancy.Demo.Hosting.Docker
{
    using System;
    using System.Diagnostics;

    using Nancy.Hosting.Self;

    class Program
    {
        static void Main()
        {
            var port = 8080;
            var config = new  Nancy.Hosting.Self.HostConfiguration
            {
                UrlReservations = new UrlReservations() { CreateAutomatically = true }
            };

            var nancyHost = new NancyHost(config, new Uri("http://0.0.0.0:" + port));
            nancyHost.Start();

            Console.WriteLine("Nancy now listening on http://0.0.0.0:" + port);

            var line = Console.ReadLine();
            while(line != "quit") {
              line = Console.ReadLine();
            }
        }
    }
}

throws the error

`Program.cs(13,50): error CS0234: The type or namespace name `HostConfiguration' does not exist in the namespace `Nancy.Hosting.Self'. Are you missing an assembly reference?`

which I don't get since it seems in the right namespace: https://github.com/NancyFx/Nancy/blob/master/src/Nancy.Hosting.Self/HostConfiguration.cs

Maybe the included DLL is old.

[zeisss]

leave the package. You are already using it. You are not doing it for the NancyHost and that worked.

[luebken]

That didnt help

            var config = new HostConfiguration();

Program.cs(13,30): error CS0246: The type or namespace name `HostConfiguration' could not be found. Are you missing an assembly reference?

[mmetesreau]

I had the same issue this afternoon... After some try, I managed to run my nancy webapp without error by using the Katana - HttpListener instead of NancyHost :

 using (WebApp.Start<Startup>(string.Format("http://*:{0}", port)))
 {
  QuitEvent.WaitOne();
}

[luebken]

@MikAdoo Do you have that running with this or some other repo? I can't get it to run.

[mmetesreau]

i have submitted a pull request

[luebken]

Thanks for the PR. Works great locally. Unfortunately I can't start it on our hosting. Since I can't bind the address "http://*:{0}" which throws a System.Net.Sockets.SocketException: The requested address is not valid in this context.

015-06-23 14:24:37.26 +0000 UTC     - docker  - System.Net.Sockets.SocketException: The requested address is not valid in this context
2015-06-23 14:24:37.26 +0000 UTC     - docker  - Unhandled Exception:
2015-06-23 14:24:37.26 +0000 UTC     - docker  - at System.Net.EndPointListener..ctor (System.Net.IPAddress addr, Int32 port, Boolean secure) [0x00000] in <filename unknown>:0
2015-06-23 14:24:37.26 +0000 UTC     - docker  - at System.Net.Sockets.Socket.Bind (System.Net.EndPoint local_end) [0x00000] in <filename unknown>:0
2015-06-23 14:24:37.261 +0000 UTC    - docker  - at System.Net.EndPointManager.AddPrefixInternal (System.String p, System.Net.HttpListener listener) [0x00000] in <filename unknown>:0
2015-06-23 14:24:37.261 +0000 UTC    - docker  - at System.Net.EndPointManager.AddListener (System.Net.HttpListener listener) [0x00000] in <filename unknown>:0
2015-06-23 14:24:37.261 +0000 UTC    - docker  - at System.Net.EndPointManager.GetEPListener (System.String host, Int32 port, System.Net.HttpListener listener, Boolean secure) [0x00000] in <filename unknown>:0
2015-06-23 14:24:37.261 +0000 UTC    - docker  - at System.Net.EndPointManager.AddPrefixInternal (System.String p, System.Net.HttpListener listener) [0x00000] in <filename unknown>:0
2015-06-23 14:24:37.261 +0000 UTC    - docker  - at System.Net.EndPointListener..ctor (System.Net.IPAddress addr, Int32 port, Boolean secure) [0x00000] in <filename unknown>:0
2015-06-23 14:24:37.261 +0000 UTC    - docker  - at System.Net.EndPointManager.GetEPListener (System.String host, Int32 port, System.Net.HttpListener listener, Boolean secure) [0x00000] in <filename unknown>:0
2015-06-23 14:24:37.261 +0000 UTC    - docker  - at System.Net.Sockets.Socket.Bind (System.Net.EndPoint local_end) [0x00000] in <filename unknown>:0
2015-06-23 14:24:37.261 +0000 UTC    - docker  - at System.Net.EndPointManager.AddListener (System.Net.HttpListener listener) [0x00000] in <filename unknown>:0
2015-06-23 14:24:37.261 +0000 UTC    - docker  - [ERROR] FATAL UNHANDLED EXCEPTION: System.Net.Sockets.SocketException: The requested address is not valid in this context

I'm used to bind to all IP addresses via 0.0.0.0. But if I specify that via

            using (WebApp.Start<Startup>(string.Format("http://0.0.0.0:{0}", port)))

I get the error Bad Request (Invalid host) in the browser. No more logs unfortunately.

[mmetesreau]

Arf.... Before my pull request, I also encountered the bind issue. This morning I tested my update on a digital ocean linux vm and everything worked fine. I made another test right now on my computer on windows, boot2docker and custom hostname in my etc/host and the container still works fine. Could you tell me more about your own environment? Did you try with "http://+:{0}" instead of "http://*:{0}"?

[luebken]

"http://+:{0}"worked awesome: http://nancy-luebken.gigantic.io/

@MikAdoo Thanks a lot!

[mmetesreau]

Cool! You are welcome.