I want to pass a class as parameter to my Web API. Here is my code:
Web API:
[Route("api/[controller]")]
public class ValuesController : Controller
{
[HttpPost]
public string Post(ClusteringObject _cluesteringObject)
{
return _cluesteringObject.NumberOfCluster.ToString();
}
}
public class ClusteringObject
{
public string Data { get; set; }
public int NumberOfCluster { get; set; }
}
And my test console App code:
class Program
{
static void Main(string[] args)
{
HttpClient client = new HttpClient();
client.BaseAddress = new Uri("http://localhost:57961/");
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(
new MediaTypeWithQualityHeaderValue("application/json"));
var testData = new ClusteringObject()
{
Data = "asdf",
NumberOfCluster = 1
};
HttpResponseMessage response = client.PostAsJsonAsync("api/values", testData).Result;
string res = "";
using (HttpContent content = response.Content)
{
Task<string> result = content.ReadAsStringAsync();
res = result.Result;
}
}
}
public class ClusteringObject
{
public string Data { get; set; }
public int NumberOfCluster { get; set; }
}
My post action returns 0. It seems, I couldn't pass my object to Web API thats why it shows default values of each properties. How can I pass instance of ClusteringObject to my Web API ?
PostAsJsonAsync will send ClusteringObject as Body in the request, I suggest you try
FromBody like
public string Post([FromBody]ClusteringObject _cluesteringObject)
Related
For audit purposes I'm trying to get the current logged in user in my DbContext. However I'm having some issues with this. A few things to take into account:
In Blazor Server we have to use AddDbContextFactory
IHttpContextAccessor returns no result in deployed website (might be because IHttpContextAccessor is not thread safe?)
I created a custom DbContext that injects AuthenticationStateProvider.
public partial class CustomDbContext : DbContext
{
private AuthenticationStateProvider _authenticationStateProvider;
#region construction
public CustomDbContext ()
{
}
public CustomDbContext (AuthenticationStateProvider stateProvider)
{
_authenticationStateProvider = stateProvider;
}
[ActivatorUtilitiesConstructor]
public CustomDbContext (DbContextOptions<CustomDbContext> options, AuthenticationStateProvider stateProvider) : base(options)
{
_authenticationStateProvider = stateProvider;
}
public CustomDbContext(DbContextOptions<CustomDbContext> options) : base(options)
{
}
#endregion
...
In this DbContext, when overwriting the SaveChanges I get the User and their claims:
var state = await _authenticationStateProvider.GetAuthenticationStateAsync();
var userIdClaim = state.User.Claims.FirstOrDefault(c => c.Type == "userId")?.Value;
userId = userIdClaim != null && !string.IsNullOrEmpty(userIdClaim ) ? userIdClaim : string.Empty;
...
However when I call .CreateDbContext(); on the injected DbContextFactory, I get the following exception:
'Cannot resolve scoped service
'Microsoft.AspNetCore.Components.Authorization.AuthenticationStateProvider'
from root provider.'
I've found some topics about this, but the suggested solution there is to create a custom DbContextFactory that is scoped. But then you lose the reason why you are using the DbContextFactory, no?
Any ideas on how to solve this?
Thank you
The DBContextFactory is a singleton registered in the root application DI container, while the AuthenticationStateProvider is a scoped service that is registered in the Hub session DI container. You can't access a lower order service from a higher order service.
You need to rethink your design and provide the user information from whatever scoped service is making whatever call to need a DbConbtext.
Additional Information
I'm not sure what your data pipeline looks like so this example uses the Blazor template weather forecast.
First a View Service that components inject and use.
This injects the AuthenticationStateProvider. It gets the current user for each request and passes it to the data pipeline in a request object.
public class WeatherForecastViewService
{
private AuthenticationStateProvider _authenticationStateProvider; // scoped service
private WeatherForecastService _weatherForecastService; //Singleton Service
public WeatherForecastViewService(AuthenticationStateProvider authenticationStateProvider, WeatherForecastService weatherForecastService)
{
_authenticationStateProvider = authenticationStateProvider;
_weatherForecastService = weatherForecastService;
}
public async ValueTask SaveWeatherForecast(WeatherForecast record)
{
var user = await GetCurrentUser();
var request = new RecordRequest<WeatherForecast>(record, user );
await _weatherForecastService.SaveRecord(request);
}
private async ValueTask<ClaimsPrincipal> GetCurrentUser()
{
var state = await _authenticationStateProvider.GetAuthenticationStateAsync();
return state.User ?? new ClaimsPrincipal();
}
}
Here are the request and result objects:
public readonly struct RecordRequest<TRecord>
{
public TRecord Record { get; init; }
public ClaimsPrincipal Identity { get; init; }
public RecordRequest(TRecord record, ClaimsPrincipal identity)
{
this.Record = record;
this.Identity = identity;
}
}
public record RecordResult
{
public bool SuccessState { get; init; }
public string Message { get; init; }
private RecordResult(bool successState, string? message)
{
this.SuccessState = successState;
this.Message = message ?? string.Empty;
}
public static RecordResult Success(string? message = null)
=> new RecordResult(true, message);
public static RecordResult Failure(string message)
=> new RecordResult(false, message);
}
And here's the singleton data service
public class WeatherForecastDataService
{
// This is a singleton
private readonly IDbContextFactory<DbContext> _factory;
public WeatherForecastDataService(IDbContextFactory<DbContext> factory)
=> _factory = factory;
public async ValueTask<RecordResult> SaveRecord(RecordRequest<WeatherForecast> request)
{
if (!request.Identity.IsInRole("SomeRole"))
return RecordResult.Failure("User does not have authority");
// simulates some async DB activity
await Task.Delay(100);
// Get your DbContext from the injected Factory
// using var dbContext = this.factory.CreateDbContext();
// do your db stuff
return RecordResult.Success();
}
}
PS I haven'y actually run this code so there may be some typos!
IHttpContextAccessor returns no result in deployed website (might be because IHttpContextAccessor is not thread safe?)
Nothing to do with whether IHttpContextAccessor is not thread safe... It's simply because the HttpContext object is not available in Blazor Server App, as communication between the client side (browser) and server side is done through the SignalR protocol, not HTTP. But there is a way how to access the HttpContext object before the Blazor App is rendered, as the initial call to the app is always made through HTTP request; that is, when you enter a url into the address bar of your browser and hit the enter button. See here how to do that...
The following code snippet describes how to inject an AuthenticationStateProvider into the ApplicationDbContext object created by default when you select Individual Accounts in Blazor Server App.
Copy and test. It should work...
Data/ApplicationDbContext.cs
public class ApplicationDbContext : IdentityDbContext
{
public DbSet<Employee> Employees { get; set; }
private AuthenticationStateProvider _authenticationStateProvider;
public ApplicationDbContext(DbContextOptions<ApplicationDbContext>
options, AuthenticationStateProvider stateProvider)
: base(options)
{
_authenticationStateProvider = stateProvider;
}
public override async Task<int>
SaveChangesAsync(CancellationToken cancellationToken)
{
var stateProvider = await
_authenticationStateProvider.GetAuthenticationStateAsync();
if (stateProvider.User.Identity.IsAuthenticated)
{
Console.WriteLine("Authenticated User name: " +
stateProvider.User.Identity.Name);
}
// Delegate the saving action to the base class
return await base.SaveChangesAsync(cancellationToken);
}
}
Create an Employee Repository class service:
EmployeeRepository.cs
using <put here the namespace of your app>.Data;
using <put here the namespace of your app>.Models;
using Microsoft.EntityFrameworkCore;
public class EmployeeRepository
{
private readonly ApplicationDbContext ApplicationDbContext;
public EmployeeRepository(ApplicationDbContext
applicationDbContext)
{
ApplicationDbContext = applicationDbContext;
}
public async Task<Employee> CreateEmployee(Employee employee)
{
CancellationTokenSource cancellationTokenSource = new
CancellationTokenSource();
CancellationToken token = cancellationTokenSource.Token;
await ApplicationDbContext.Employees.AddAsync(employee);
await ApplicationDbContext.SaveChangesAsync(token);
return employee;
}
}
Index.razor
#inject EmployeeRepository EmployeeRepository
#using <Put here....>.Models
<button type="button" #onclick="SaveEmployee">Save Employee</button>
#if (emp != null)
{
<div>#emp.ID.ToString()</div>
<div>#emp.FirstName</div>
<div>#emp.LastName</div>
<div>#emp.City</div>
}
#code
{
private Employee emp;
private async Task SaveEmployee()
{
Employee employee = new Employee { FirstName = "Joana", LastName = "Brown", City = "London" };
emp = await EmployeeRepository.CreateEmployee(employee);
}
}
Create model class Employee:
Models/Employee.cs
public class Employee
{
public int ID { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string City { get; set; }
}
Note: To test this code, you'll have to create A Blazor Server App with Individual Accounts, create the database, including the Employees table
Last but not least: Startup
// Created by the default template
//services.AddDbContext<ApplicationDbContext>(options =>
// options.UseSqlServer(
// Configuration.GetConnectionString("DefaultConnection")));
services.AddDefaultIdentity<IdentityUser>(options =>
options.SignIn.RequireConfirmedAccount = true)
.AddEntityFrameworkStores<ApplicationDbContext>();
services.AddRazorPages();
services.AddServerSideBlazor();
services.AddDbContextFactory<ApplicationDbContext>(options =>
options.UseSqlServer(
Configuration.GetConnectionString("DefaultConnection")),
ServiceLifetime.Scoped);
// This is your code...
services.AddScoped<ApplicationDbContext>(p =>
p.GetRequiredService<IDbContextFactory<ApplicationDbContext>>
().CreateDbContext());
services.AddScoped<EmployeeRepository>();
services.AddScoped<AuthenticationStateProvider,
RevalidatingIdentityAuthenticationStateProvider<IdentityUser>>();
services.AddDatabaseDeveloperPageExceptionFilter();
services.AddSingleton<WeatherForecastService>();
UPDATE:
but does that no against the the recommendations of Microsoft? They ae suggesting to always use using
var context = DbFactory.CreateDbContext();
You mean:
using var context = DbFactory.CreateDbContext();
No, it is not against the recommendations of Microsoft. It's another way to instantiate the DbContext. I did it that way in order to stick to this code by you:
services.AddScoped<ApplicationDbContext>(p => p.GetRequiredService<IDbContextFactory<ApplicationDbContext>>().CreateDbContext());
Anyhow, these are the changes you should make in order to reflect "Microsoft's recommendations"
Change:
services.AddScoped<ApplicationDbContext>(p => p.GetRequiredService<IDbContextFactory<ApplicationDbContext>>().CreateDbContext());
To:
services.AddScoped<ApplicationDbContext>();
Change:
private readonly ApplicationDbContext ApplicationDbContext;
public EmployeeRepository(ApplicationDbContext
applicationDbContext)
{
ApplicationDbContext = applicationDbContext;
}
To:
private readonly IDbContextFactory<ApplicationDbContext>
DbFactory;
public EmployeeRepository(IDbContextFactory<ApplicationDbContext>
_DbFactory)
{
DbFactory = _DbFactory;
}
And change:
await ApplicationDbContext.Employees.AddAsync(employee);
await ApplicationDbContext.SaveChangesAsync(token);
To:
await context.Employees.AddAsync(employee);
await context.SaveChangesAsync(token);
Also add:
using var context = DbFactory.CreateDbContext();
at the beginning of the EmployeeRepository.CreateEmployee method
Run and test.
Hope this work...
New Version
Data/ApplicationDbContext.cs
public class ApplicationDbContext : IdentityDbContext
{
public DbSet<Employee> Employees { get; set; }
private AuthenticationStateProvider _authenticationStateProvider;
public ApplicationDbContext(DbContextOptions<ApplicationDbContext>
options, AuthenticationStateProvider stateProvider)
: base(options)
{
_authenticationStateProvider = stateProvider;
}
public override async Task<int>
SaveChangesAsync(CancellationToken cancellationToken)
{
var stateProvider = await
_authenticationStateProvider.GetAuthenticationStateAsync();
if (stateProvider.User.Identity.IsAuthenticated)
{
Console.WriteLine("Authenticated User name: " +
stateProvider.User.Identity.Name);
}
// Delegate the saving action to the base class
return await base.SaveChangesAsync(cancellationToken);
}
}
Create an Employee Repository class service:
EmployeeRepository.cs
using <put here the namespace of your app>.Data;
using <put here the namespace of your app>.Models;
using Microsoft.EntityFrameworkCore;
public class EmployeeRepository
{
private readonly IDbContextFactory<ApplicationDbContext> DbFactory;
public EmployeeRepository(IDbContextFactory<ApplicationDbContext> _DbFactory)
{
DbFactory = _DbFactory;
}
public async Task<Employee> CreateEmployee(Employee
employee)
{
using var context = DbFactory.CreateDbContext();
// CancellationTokenSource provides the token and have authority to cancel the token
CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
CancellationToken token = cancellationTokenSource.Token;
await context.Employees.AddAsync(employee);
await context.SaveChangesAsync(token);
return employee;
}
}
Index.razor
#inject EmployeeRepository EmployeeRepository
#using <Put here....>.Models
<button type="button" #onclick="SaveEmployee">Save Employee</button>
#if (emp != null)
{
<div>#emp.ID.ToString()</div>
<div>#emp.FirstName</div>
<div>#emp.LastName</div>
<div>#emp.City</div>
}
#code
{
private Employee emp;
private async Task SaveEmployee()
{
Employee employee = new Employee { FirstName = "Joana", LastName = "Brown", City = "London" };
emp = await EmployeeRepository.CreateEmployee(employee);
}
}
Create model class Employee:
Models/Employee.cs
public class Employee
{
public int ID { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string City { get; set; }
}
Note: To test this code, you'll have to create A Blazor Server App with Individual Accounts, create the database, including the Employees table
Last but not least: Startup
public void ConfigureServices(IServiceCollection services)
{
services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
.AddEntityFrameworkStores<ApplicationDbContext>();
services.AddRazorPages();
services.AddServerSideBlazor();
services.AddDbContextFactory<ApplicationDbContext>(options =>
options.UseSqlServer(
Configuration.GetConnectionString("DefaultConnection")),
ServiceLifetime.Scoped);
services.AddScoped<ApplicationDbContext>();
services.AddScoped<EmployeeRepository>();
services.AddScoped<AuthenticationStateProvider, RevalidatingIdentityAuthenticationStateProvider<IdentityUser>>();
services.AddDatabaseDeveloperPageExceptionFilter();
services.AddSingleton<WeatherForecastService>();
}
iam trying to call particular intent when someone selects any intent eg:if user selects cmtools intent then the user can ask questions related to cmtools only. Other than cmtools if user asks question then the bot should rply Sorry not a good match.Please help me with the code to call intents from switch case or any other idea is appreciated.
Thanks in advance!
using System;
using System.Net.Http;
using System.Threading.Tasks;
using System.Collections.Generic;
using Microsoft.Bot.Builder.Dialogs;
using Microsoft.Bot.Builder.Luis;
using Microsoft.Bot.Builder.Luis.Models;
using Newtonsoft.Json;
using System.Text;
namespace Microsoft.Bot.Sample.LuisBot
{
[LuisModel("id","key")]
[Serializable]
public class BasicLuisDialog : LuisDialog<object>
{
// QnA Maker global settings
// assumes all KBs are created with same Azure service
static string qnamaker_endpointKey = "endpointkey";
static string qnamaker_endpointDomain = "chatbot";
// QnA Maker Knowledge base
static string AIS_KB= "id1";
static string Speed_KB = "id2";
static string CMTools_KB = "id3";
// QnA Maker Finance Knowledge base
// Instantiate the knowledge bases
public QnAMakerService AIS_KBQnAService = new QnAMakerService("https://" + qnamaker_endpointDomain + ".azurewebsites.net", AIS_KB, qnamaker_endpointKey);
public QnAMakerService Speed_KBQnAService = new QnAMakerService("https://" + qnamaker_endpointDomain + ".azurewebsites.net", Speed_KB, qnamaker_endpointKey);
public QnAMakerService CMTools_KBQnAService = new QnAMakerService("https://" + qnamaker_endpointDomain + ".azurewebsites.net", CMTools_KB, qnamaker_endpointKey);
public const string AIS_KBIntent = "AIS_KB";
public const string Speed_KBIntent = "Speed_KB"; // new intent
public const string CMTools_KBIntent = "CMTools_KB"; // new intent
public class Metadata
{
public string name { get; set; }
public string value { get; set; }
}
public class Answer
{
public IList<string> questions { get; set; }
public string answer { get; set; }
public double score { get; set; }
public int id { get; set; }
public string source { get; set; }
public IList<object> keywords { get; set; }
public IList<Metadata> metadata { get; set; }
}
public class QnAAnswer
{
public IList<Answer> answers { get; set; }
}
[Serializable]
public class QnAMakerService
{
private string qnaServiceHostName;
private string knowledgeBaseId;
private string endpointKey;
public QnAMakerService(string hostName, string kbId, string endpointkey)
{
qnaServiceHostName = hostName;
knowledgeBaseId = kbId;
endpointKey = endpointkey;
}
async Task<string> Post(string uri, string body)
{
using (var client = new HttpClient())
using (var request = new HttpRequestMessage())
{
request.Method = HttpMethod.Post;
request.RequestUri = new Uri(uri);
request.Content = new StringContent(body, Encoding.UTF8, "application/json");
request.Headers.Add("Authorization", "EndpointKey " + endpointKey);
var response = await client.SendAsync(request);
return await response.Content.ReadAsStringAsync();
}
}
public async Task<string> GetAnswer(string question)
{
string uri = qnaServiceHostName + "/qnamaker/knowledgebases/" + knowledgeBaseId + "/generateAnswer";
string questionJSON = #"{'question': '" + question + "'}";
var response = await Post(uri, questionJSON);
var answers = JsonConvert.DeserializeObject<QnAAnswer>(response);
if (answers.answers.Count > 0)
{
return answers.answers[0].answer;
}
else
{
return "No good match found.";
}
}
}
public enum Selection
{
CMTools, AIS, Speed
}
[LuisIntent("AppSelection")]
private async Task AppSelection(IDialogContext context, LuisResult result)
{
var options = new Selection[] { Selection.CMTools, Selection.AIS, Selection.Speed };
var descriptions = new string[] { "CMTools", "AIS", "Speed" };
PromptDialog.Choice<Selection>(context, ResumeAfterOrderSelectionClarification,options, "Please choose your application?", descriptions: descriptions );
}
private async Task ResumeAfterOrderSelectionClarification(IDialogContext context, IAwaitable<Selection> result,LuisResult result1)
{
var selection = await result;
await context.PostAsync($"Thanks for choosing {selection}. how can I help you ?");
switch(selection){
case CMTools:
await context.PostAsync($"CMTools");
//code needed to call CMTools_KB intent
break;
case AIS:
await context.PostAsync($"AIS_KB");
//code needed to call AIS_KB intent
break;
case Speed:
await context.PostAsync($"Speed_KB");
// Ask the HR knowledge base
//code needed to call Speed_KB intent
break;
default:
await context.PostAsync($"testing.........");
}
}
[LuisIntent("")]
[LuisIntent("None")]
public async Task NoneIntent(IDialogContext context, LuisResult result)
{
HttpClient client = new HttpClient();
await this.ShowLuisResult(context, result);
}
[LuisIntent("AIS_KB")]
public async Task AIS_KBIntent(IDialogContext context, LuisResult result)
{
// Ask the HR knowledge base
var qnaMakerAnswer = await AIS_KBQnAService.GetAnswer(result.Query);
await context.PostAsync($"{qnaMakerAnswer}");
context.Wait(MessageReceived);
}
[LuisIntent("Speed_KB")]
public async Task Speed_KBIntent(IDialogContext context, LuisResult result)
{
// Ask the HR knowledge base
var qnaMakerAnswer = await Speed_KBQnAService.GetAnswer(result.Query);
await context.PostAsync($"{qnaMakerAnswer}");
context.Wait(MessageReceived);
}
[LuisIntent("CMTools_KB")]
public async Task CMTools_KBIntent(IDialogContext context, LuisResult result)
{
// Ask the HR knowledge base
var qnaMakerAnswer = await CMTools_KBQnAService.GetAnswer(result.Query);
await context.PostAsync($"{qnaMakerAnswer}");
context.Wait(MessageReceived);
}
private async Task ShowLuisResult(IDialogContext context, LuisResult result)
{
await context.PostAsync($"Sorry , I am not able to help you with this questions,Please connect our L2 Support Group");
var qnaMakerAnswer = await CMTools_KBQnAService.GetAnswer(result.Query);
await context.PostAsync($"{qnaMakerAnswer}");
await context.PostAsync($"it is finished ");
context.Wait(MessageReceived);
}
}
}
i've been strugling with this "thing" for the pass 2 weeks now
public class Post
{
public int userId { get; set; }
public int id { get; set; }
public string title { get; set; }
public string body { get; set; }
}
public partial class MainPage : ContentPage
{
private const string url = "https://jsonplaceholder.typicode.com/posts";
private HttpClient _Client = new HttpClient();
private ObservableCollection<Post> _post;
public MainPage()
{
InitializeComponent();
}
protected override async void OnAppearing()
{
try
{
var content = await _Client.GetStringAsync(url);
var post = JsonConvert.DeserializeObject<List<Post>>(content);
_post = new ObservableCollection<Post>(post);
Post_List.ItemsSource = _post;
await DisplayAlert("content", content, "ok");
base.OnAppearing();
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
}
}
with this code everithing is returned in xamarin forms / windows
but in android it doesnt return anything, and the only error is
System.Net.Http.HttpRequestException: An error occurred while sending the request
Please send some help!
Thanks
It's seems there is an issue with the server certificate. Fortunately, an app can accept any certificate using a custom validator.
An application can set the ServerCertificateValidationCallback
property to a method to use for custom validation by the client of the
server certificate.
Certificate validator implemementation:
System.Net.ServicePointManager.ServerCertificateValidationCallback += delegate { return true; };
For more information read here.
I've currently built a simple Signalr Hub which I'm pushing messages to from a Unity5 project. Given that SignalR2 client doesn't work with Unity5 I'm using websocketsharp in order to intercept the websocket frames. The messages are being pushed to the Hub successfully, but when I attempt to call a method on the client, I do not get the payload string, only the message identifier {"I": 0}
Looking through the SignalR documentation, it looks like this gets sent last, but I have no idea how I can get a hold it it. I'm sure its something simple, but for the life of me I can't figure it out.
UPDATE
Upon request, I've added the code for the project below...
SignalRClient.cs
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using Newtonsoft.Json;
using WebSocketSharp;
namespace Assets.Scripts
{
class SignalRClient
{
private WebSocket _ws;
private string _connectionToken;
private Dictionary<string, UnTypedActionContainer> _actionMap;
private readonly string _socketUrl = "http://localhost/";
private readonly string _socket = "ws://localhost/";
public SignalRClient()
{
_actionMap = new Dictionary<string, UnTypedActionContainer>();
var webRequest = (HttpWebRequest)WebRequest.Create(_socketUrl + "/signalr/negotiate?connectionData=%5B%7B%22name%22%3A%22myHub%22%7D%5D&clientProtocol=1.3");
var response = (HttpWebResponse)webRequest.GetResponse();
using (var sr = new StreamReader(response.GetResponseStream()))
{
var payload = sr.ReadToEnd();
UnityEngine.Debug.Log(payload);
_connectionToken = Uri.EscapeDataString(JsonConvert.DeserializeObject<NegotiateResponse>(payload).ConnectionToken);
//UnityEngine.Debug.Log(_connectionToken);
}
}
public void Open()
{
_ws = _ws == null
? new WebSocket(_socket + "signalr/connect?transport=webSockets&connectionToken=" + _connectionToken)
: new WebSocket(_socket + "signalr/reconnect?transport=webSockets&connectionToken=" + _connectionToken);
AttachAndConnect();
}
public void Close()
{
_ws.Close();
}
public void SendMessage(string name, string message)
{
//{"H":"chathub","M":"Send","A":["tester","hello"],"I":0}
var payload = new RollerBallWrapper()
{
H = "myhub",
M = "Send",
A = new[] { name, message },
I = 12
};
var wsPacket = JsonConvert.SerializeObject(payload);
_ws.Send(wsPacket);
}
private void AttachAndConnect()
{
_ws.OnClose += _ws_OnClose;
_ws.OnError += _ws_OnError;
_ws.OnMessage += _ws_OnMessage;
_ws.OnOpen += _ws_OnOpen;
_ws.Connect();
}
void _ws_OnOpen(object sender, EventArgs e)
{
UnityEngine.Debug.Log("Opened Connection");
}
//
// This seems to be retriving the last frame containing the Identifier
void _ws_OnMessage(object sender, MessageEventArgs e)
{
//UnityEngine.Debug.Log(e.Data); // Returns {"I":"0"} ????
}
void _ws_OnError(object sender, WebSocketSharp.ErrorEventArgs e)
{
UnityEngine.Debug.Log(e.Message);
}
void _ws_OnClose(object sender, CloseEventArgs e)
{
UnityEngine.Debug.Log(e.Reason + " Code: " + e.Code + " WasClean: " + e.WasClean);
}
public void On<T>(string method, Action<T> callback) where T : class
{
_actionMap.Add(method, new UnTypedActionContainer
{
Action = new Action<object>(x =>
{
callback(x as T);
}),
ActionType = typeof(T)
});
}
}
internal class UnTypedActionContainer
{
public Action<object> Action { get; set; }
public Type ActionType { get; set; }
}
class MessageWrapper
{
public string C { get; set; }
public RollerBallWrapper[] M { get; set; }
}
class RollerBallWrapper
{
public string H { get; set; }
public string M { get; set; }
public string[] A { get; set; }
public int I { get; set; }
}
}
MyHub.cs
using System;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNet.SignalR;
public class MyHub : Hub
{
public void Send(string name, string message)
{
var myConn = Context.ConnectionId;
Clients.All.broadcastMessage("John", "Hello");
}
}
The problem is the websocket connection. I had the following:
new WebSocket(_socket + "signalr/connect?transport=webSockets&connectionToken=" + _connectionToken)
Which was missing 2 critical querystring parameters: connectionData and tid in addition to the connectionToken and transport. I wrongly assumed that these weren't needed.
I hope this helps anyone who didn't read the documentation like me :)
I think I am losing my mind. :)
I've been struggling with this for two days now. The code looks right. But for some reason when I try to access the [ImportMany] field, it is null, or at least not returning any values.
It get the 3 parts in the catalog, but they don't get applied to the Lazy[] import I am defining.
Here's my code:
using System;
using System.Linq;
using System.ComponentModel.Composition;
using System.ComponentModel.Composition.Hosting;
namespace MefTest
{
// Extension interface and metadata
public interface IUIExtension
{
void DoSomething();
}
public interface IUIExtensionDetails
{
string Name { get; }
string Uri { get; }
}
[MetadataAttribute]
[AttributeUsage(AttributeTargets.Class, AllowMultiple=false)]
public class UIExtensionAttribute : ExportAttribute
{
public UIExtensionAttribute() : base(typeof(IUIExtensionDetails)) { }
public string Name { get; set; }
public string Uri { get; set; }
}
// Extensions
[UIExtension(Name="Test 01", Uri="http://www.yourmomma.com/")]
public class Test1Extension : IUIExtension
{
public void DoSomething() { }
}
[UIExtension(Name = "Test 02", Uri = "http://www.yourdaddy.com/")]
public class Test2Extension : IUIExtension
{
public void DoSomething() { }
}
[UIExtension(Name = "Test 03", Uri = "http://www.youruncle.com/")]
public class Test3Extension : IUIExtension
{
public void DoSomething() { }
}
// Main program
public class Program
{
static void Main(string[] args)
{
Program p = new Program();
p.Run();
}
[ImportMany]
public Lazy<IUIExtension, IUIExtensionDetails>[] Senders { get; set; }
public void Run()
{
Compose();
}
public void Compose()
{
var catalog = new AssemblyCatalog(
System.Reflection.Assembly.GetExecutingAssembly());
var container = new CompositionContainer(catalog);
container.ComposeParts(this);
// This is always 3
Console.WriteLine(
(from g in container.Catalog.Parts select g).Count());
// This is always 0
Console.WriteLine(Senders.Length);
Console.ReadKey();
}
}
}
Your error is here:
public UIExtensionAttribute() : base(typeof(IUIExtensionDetails))
You should pass the contract type there, not the metadata type:
public UIExtensionAttribute() : base(typeof(IUIExtension))
(Also, in order to make sure that your custom export class has the right properties as expected by the import with metadata, I would make it implement the IUIExtensionDetails interface. But that is not mandatory.)
Your metadata attribute is defining the exports as typeof(IUIExtensionDetails) which is your metadata contract, not your actual extension. Change the custom attribute constructor to:
public UIExtensionAttribute() : base(typeof(IUIExtension)) { }