How to fix "Unable to load shared library 'httpapi.dll' or one of its dependencies"

Question

I'm a new in linux. But I need to run asp net core app at this os. I build and compile app successfuly in windows 10, but when I move this to linux and try to run get following exception

Application startup exception: System.TypeInitializationException: The type initializer for 'Microsoft.AspNetCore.Server.HttpSys.HttpApi' threw an exception. ---> System.DllNotFoundException: Unable to load shared library 'httpapi.dll' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: libhttpapi.dll: cannot open shared object file: No such file or directory
   at Microsoft.AspNetCore.Server.HttpSys.HttpApi.HttpInitialize(HTTPAPI_VERSION version, UInt32 flags, Void* pReserved)   at Microsoft.AspNetCore.Server.HttpSys.HttpApi.InitHttpApi(UInt16 majorVersion, UInt16 minorVersion)
   at Microsoft.AspNetCore.Server.HttpSys.HttpApi..cctor()
   --- End of inner exception stack trace ---
   at Microsoft.AspNetCore.Server.HttpSys.HttpSysListener..ctor(HttpSysOptions options, ILoggerFactory loggerFactory)
   at Microsoft.AspNetCore.Server.HttpSys.MessagePump..ctor(IOptions`1 options, ILoggerFactory loggerFactory, IAuthenticationSchemeProvider authentication)
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitSingleton(SingletonCallSite singletonCallSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureServer()
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()

And I really need to use httpSys driver. That is in my code

 public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .UseHttpSys();

score 1 · Accepted Answer · answered Jan 17 '19 at 12:03

1

You can't run Http.sys on Linux, its a windows only hosting option.See the documentation.

Http.sys is tightly coupled to windows (and IIS, which is the Microsoft Webserver).

For Linux you have to use Kestrel.

answered Jan 17 '19 at 12:03

Tseng

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Thanks! It's really my bad Dear friend, could you recommend me a way to launch my app on https://localhost/ (:433 port). Kestrel writes : Unable to start Kestrel. System.IO.IOException: Failed to bind to address https://localhost:443. ---> System.AggregateException: One or more errors occurred – Ilya Jan 17 '19 at 12:27
Run it as root. Linux requires root privileges for ports lower than 1024. Or use a higher port and do port mapping on that one – Tseng Jan 17 '19 at 12:30
Yup, it works. But only with single port (:443) I get exception {System.IO.IOException: Failed to bind to address localhost:443 Why it fails with default port? – Ilya Jan 17 '19 at 12:58
Something else running on that port? You can only bind one application on that port. Typically you run ASP.NET Core applications on a high port, >=5000 and use nginx (or nginx + docker for both app and nginx) as reverse proxy to your application. But thats a separate question on it own – Tseng Jan 17 '19 at 13:12
There is a web site that binded to this port. It should send requests to my asp app – Ilya Jan 17 '19 at 13:29

How to fix "Unable to load shared library 'httpapi.dll' or one of its dependencies"

1 Answers1