CODEWITHSUNDEEP
c#asp.netasp.net-coreasp.net-core-2.0asp.net-core-2.1
AppleCiderYummy
AppleCiderYummy

Reputation: 389

Get the Domain or Host name and Port in Configure of Startup.cs

I'm in need of help in getting the host/domain name and port of my application.

So far, here's my sample code in my Configure method inside the Startup.cs:

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    var url = ""; // something that will get the current host/domain and port of the running applicaiton.

    RecurringJob.AddOrUpdate<ISomething>(i=>i.SomethingToExecute(url), Cron.Daily);
}

Because I need to pass the url string to my SomethingToExecute method

public class Something : ISomething 
{
    public void SomethingToExecute(string url){
        ... 
        Debug.WriteLine(url)
    }
}

Upvotes: 7

Views: 9979

Answers (5)

Anderson Paiva
Anderson Paiva

Reputation: 978

This alternative option may be useful, set the hostname in your appsettings.{Environment}.json and get the value through IConfiguration:

private readonly IConfiguration _configuration;
public Startup(IConfiguration configuration){
    _configuration = configuration;
}
public void ConfigureServices(IServiceCollection services)
{
    var host = _configuration.GetSection("Host").Get<string>();
}

Upvotes: 0

LyuboBG
LyuboBG

Reputation: 171

For the host name - you can get easily it inside your controller by using Dns.GetHostName(). There is also another way is to get it from the HttpRequestContext like Startup.cs => ConfigureServices => services.AddHttpContextAccessor();

Controler => ctor => use IHttpContextAccessor and then in the controller methods

HttpContextAccessor.HttpContext.Request.Host.Host HttpContextAccessor.HttpContext.Request.Host.Port

However, HttpRequetsContext info is not very trustful.

Probably the best way to get host and port is discussed here already: Determine port Kestrel binded to

Upvotes: 0

mark333...333...333
mark333...333...333

Reputation: 1360

It seems impossible but alternatively, if you want to invoke the HTTP Request or a Web API using C# Code, you can use HttpClient()

What you can do is combine what @TanvirArjel said and use HttpClient() to invoke the HTTP Request.

  1. Store your host name in appsettings.json

  2. In your SomethingToExecute() use something like this.

    private readonly IConfiguration configuration;
public ISomething(IConfiguration configuration){
    this.configuration = configuration;
}

public void SomethingToExecute(){
    var httpClient = new HttpClient();

    var yourHostNameAndPort = configuration["NameFromYourAppSEttingsJsonFile"];

    httpClient.Get("" + yourHostNameAndPort + "...);
}

I hope it helps somebody else too.

Upvotes: 1

Masoud Keshavarz
Masoud Keshavarz

Reputation: 2234

As TanvirArjel already mentioned it seems impossible. But in your case you can dynamically get host name in your code body.

(Tested in .Net Core 2.1)

Startup.cs

public void ConfigureServices(IServiceCollection services)
{
    services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
    services.AddSingleton<something>();
}

something.cs

public class something
{
    public string url;

    public string SomethingToExecute()
    {
        return url;
    }

}

Controller

[ApiController]
public class HomeController : ControllerBase
{

    private something _sth;

    public HomeController(something sth)
    {
        _sth = sth;
    }

    [HttpGet("foo")]
    public string foo()
    {

        _sth.url = Request.Scheme + "://" + Request.Host;
        return _sth.SomethingToExecute();

    }

}

Upvotes: 0

TanvirArjel
TanvirArjel

Reputation: 32069

According to this Github Issue and response from the ASP.NET Core team:

It's not possible. You need to read this information directly from config. The server does not read the endpoint configuration until it's ready to start the application (after Startup). Even then, that information would be inaccurate much of the time due to reverse proxy setups like IIS, Nginx, docker, etc..

Upvotes: 7

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