In my asp.net core web api project, when I try to an entity/model using post method, its failing.
[HttpPost]
public IActionResult AddDeviceController([FromBody] DeviceController controller)
{
if (controller == null) return GetActionResult(HttpStatusCode.BadRequest, "DeviceController cannot be null");
return GetActionResult(service.AddDeviceController(null, null, null), HttpMethod.Post);
}
Here DeviceController model exists in a seperate assembly.
If I copy this model code to the web api service, it works perfectly! However, it fails to load when I refer it from the Models project. In this case, I receive System.IO.FileNotFoundExceptionexception with an error message Cannot load assembly C:\\3_SourceCode\mywebPI\bin\Debug\netcoreapp2.0\MywebApi.Models.dll
Please help me to get over this.
Check for the dll in the dependencies and in bin.
Related
I have an MVC 5 project which uses Windows authentication.
In order of adding pdf export support, I try to set up Rotativa lib.
The first try was Controller method
public ActionResult PrintViewToPdf()
{
return new ActionAsPdf("myAction");
}
which results as error 401.2 page in pdf file.
As i undestand (please let me know if there is another solution!!!), there is the only workaround:
public ActionResult PrintViewToPdf()
{
return new ViewAsPdf("myView");
}
In this case, I get a pdf file, but it contents a web page withount javascript scripts completed!
So, the question: is any another solution instead of replace ActionAsPdf to ViewAsPdf? If no, is it a solution to make ViewAsPdf include javascript execution results?
I'm new to asp.net Core 2.0.
When you Create a new ASP.net Core 2.0 MVC Project (Web Application (Model-View-Controller)), you get a HomeController with Index(), About() and Contact() methods as in MVC 5.
However you also get this:
public IActionResult Error()
{
return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
}
I can't find any documentation in Google or in any books as to what this is for and what the purpose of the single line of code is.
Can somebody please explain it? Is it some kind of best practice - should we be using this?
Thanks.
If time permit, I'll try to update my answer. But for now, the brief explanation is that every public method in your controller is callable as an http endpoint. For instance, the index method in your HomeController renders your index.cshtml view, the About renders the about.cshtml view and so on. In particular the public IActionResult Error() method is called if you redirect the user to the action when an error occurred. Consequently, it returns an Error View containing the information about the error, such as the RequestId and other values bonded with the ErrorViewModel.
I hope this help for now.
We are moving from an on premise-like application to a multi tenant cloud application.
for my web application we made a very simple interface based on IPlugin, to create a plugin architecture. (customers can have/install different plugins)
public interface IWebPlugin : IPlugin
{
string ContentBaseUrl { set; get; }
}
We have some plugins that would normally be loaded in on startup. Now i'm migrating the code to load at the beginning of a request (the Register function is called on request start), and scope everything inside this request.
It's not ideal but it would bring the least impact on the plugin system for now.
I could scope the Container by making an AppHost child container which would stick to the request:
Container IHasContainer.Container
{
get
{
if (HasStarted)
return ChildContainer;
return base.Container;
}
}
public Container ChildContainer
{
get { return HttpContext.Current.Items.GetOrAdd<Container>("ChildContainer", c => Container.CreateChildContainer()); }
}
problem case
Now im trying to make plugins work that actually add API services.
appHost.Routes.Add<GetTranslations>("/Localizations/translations", ApplyTo.Get);
But this service is unreachable (and not visible in metadata). How do i make it reachable?
I see you execute the following in ServiceController AfterInit. Re-executing this still wouldnt make it work.
//Copied from servicestack repo
public void AfterInit()
{
//Register any routes configured on Metadata.Routes
foreach (var restPath in appHost.RestPaths)
{
RegisterRestPath(restPath);
//Auto add Route Attributes so they're available in T.ToUrl() extension methods
restPath.RequestType
.AddAttributes(new RouteAttribute(restPath.Path, restPath.AllowedVerbs)
{
Priority = restPath.Priority,
Summary = restPath.Summary,
Notes = restPath.Notes,
});
}
//Sync the RestPaths collections
appHost.RestPaths.Clear();
appHost.RestPaths.AddRange(RestPathMap.Values.SelectMany(x => x));
appHost.Metadata.AfterInit();
}
solution directions
Is there a way i could override the route finding? like extending RestHandler.FindMatchingRestPath(httpMethod, pathInfo, out contentType);
Or could i restart the path compilation/caching? (would be enough for now that the service would be reachable tenant wide )
All configuration in ServiceStack should be contained within AppHost.Configure() and remain immutable thereafter. It's not ThreadSafe to modify ServiceStack's Static Configuration at runtime like trying to modify registered routes or Service Metadata which needs to be registered once at StartUp in AppHost.Configure().
It looks as though you'll need to re-architect your solution so all Routes are registered on Startup. If it helps Plugins can implement IPreInitPlugin and IPostInitPlugin interfaces to execute custom logic before and after Plugins are registered. They can also register a appHost.AfterInitCallbacks to register custom logic after ServiceStack's AppHost has been initialized.
Not sure if it's applicable but at runtime you can "hi-jack Requests" in ServiceStack by registering a RawHttpHandler or a PreRequestFilter, e.g:
appHost.RawHttpHandlers.Add(httpReq =>
MyShouldHandleThisRoute(httpReq.PathInfo)
? new CustomActionHandler((req, res) => {
//Handle Route
});
: null);
Simple answer seems to be, no. The framework wasn't build to be a run-time plugable system.
You will have to make this architecture yourself on top of ServiceStack.
Routing solution
To make it route to these run-time loaded services/routes it is needed to make your own implementation.
The ServiceStack.HttpHandlerFactory checks if a route exist (one that is registered on init). so here is where you will have to start extending. The method GetHandlerForPathInfo checks if it can find the (service)route and otherwise return a NotFoundHandler or StaticFileHandler.
My solution consists of the following code:
string contentType;
var restPath = RestHandler.FindMatchingRestPath(httpMethod, pathInfo, out contentType);
//Added part
if (restPath == null)
restPath = AppHost.Instance.FindPluginServiceForRoute(httpMethod, pathInfo);
//End added part
if (restPath != null)
return new RestHandler { RestPath = restPath, RequestName = restPath.RequestType.GetOperationName(), ResponseContentType = contentType };
technically speaking IAppHost.IServiceRoutes should be the one doing the routing. Probably in the future this will be extensible.
Resolving services
The second problem is resolving the services. After the route has been found and the right Message/Dto Type has been resolved. The IAppHost.ServiceController will attempt to find the right service and make it execute the message.
This class also has init functions which are called on startup to reflect all the services in servicestack. I didn't found a work around yet, but ill by working on it to make it possible in ServiceStack coming weeks.
Current version on nuget its not possible to make it work. I added some extensibility in servicestack to make it +- possible.
Ioc Solution out of the box
For ioc ServiceStack.Funq gives us a solution. Funq allows making child containers where you can register your ioc on. On resolve a child container will, if it can't resolve the interface, ask its parent to resolve it.
Container.CreateChildContainer()
I am trying to work out how to use the Hooks and just can't seem to get the syntax correct.
I have built a site using PirahnaCMS that has a blog component and am extending it to call some social plugins and auto post to FB, Twitter etc.
I just can't seem to get the syntax correct though. My app is MVC and I have looked at this section
1.2 ASP.NET MVC
If you're using ASP.NET MVC hooks should be attached in you Global.asax.cs in the Application_Start method, or any other place where you keep you startup code. You attach you hooks with the followin syntax:
protected void Application_Start() {
Piranha.WebPages.Hooks.Menu.RenderItemLink = (ui, str, title, url) => {
str.Append(String.Format("<span>{1}</span>", url, title)) ;
} ;
}
The Hook I believe I want to use is Piranha.WebPages.Hooks.Manager.PostEditModelAfterSave but for the life of me I can't seem to work it out.
All of the hooks are just static delegates that you can attach methods to. In the above example an anonymous method has been assigned to the hook with the syntax:
delegate += (parameters) => { method body }
You could also assign a previously declared method.
delegate += MyMethod
Example skeletons for attaching hooks should be available in the Docs at the official site. If not you can find the hooks in the file:
~/WebPages/Hooks.cs
And all delegates in:
~/Delegates.cs
I hope these URL:s are correct as I'm typing from memory :)
Regards
I wish to create a service which will be hosted on Server A (eg URL: http://servera:807). But my main application needs to be hosted on Server B (eg URL: http://serverb:801).
I am curious if this is possible or not? The reason my service and main application need to be on different servers are for reasons beyond my control. The current system uses WCF with the same setup and I'd like to move away from this.
In the examples the Service and Client all seem to be hosted in the same location / in the same solution
Below is a potential set up for solutions/projects. It's simplistic and incomplete but I think helps illustrate one possible set up. You would also need to consider how you want to handle Session information and Authentication since the MVC and ServiceStack handle this separately. See CustomAuthenticationMVC
ServerA.sln (ASP.NET Web Application)
ServiceModel project - holds requests objects and dtos (this can be shared between ServerA and ServerB solutions)
ServiceInterface project - has the Service implementations
Global.asx - has Application_Start method to configure ServiceStack
ServerB.sln (MV4 application)
ServiceModel project (shared)
Views
Models
Controllers
Example of classes in ServiceModel Project:
[Route("/Foos")]
public class Foos : IReturn<FoosResponse>
{}
public class FoosResponse
{
public FoosResponse()
{
this.ResponseStatus = new ResponseStatus();
}
public ResponseStatus ResponseStatus {get; set;}
}
Examples of classes in ServiceInterface project
public class FoosService : Service
{
public FoosResponse Get(Foos request)
{
return new FoosReponse();
}
}
Example how to call ServiceStack API within MVC4 application
public class FoosController
{
public ActionResult Index()
{
var client = new JsonServiceClient("http://servera:807");
var response = client.Get(new Foos());
return View(response);
}
}