I develop SignalR (1.1.2) chat for our corporative site (ASP.NET) and I don't know how place it for almost all pages of site. I have the next questions:
Online/offline states of users change when users move on other page.
In my chat state setting performs on OnConnected/Ondisconnected callbacks in my Hub class and it call when users move on other page.
Should I initialize SignalR with $.connection.hub.start().done on ALL pages? May be are there workarounds?
What does cross-domain mean? I don't understand this definition.
What logic should I move in OnReconnected callback in my Hub class?
Thanks in advance.
Sounds like you are trying to use SignalR in the wrong way.
You are going to have to start the hub every time you change page unless your application is a single page application. E.g. All run via JavaScript on one page.
When you change page, you are effectively closing down the SignalR connection to the hub, then you will need to start it on the next page. This will raise the Disconnect event.
Each time you connect, your user will be given a new ConnectionID, so their online/offline status will change depending on how you are handling this.
The only work around would be to create a Single Page application.
Cross-Domain means that you are calling the SignalR methods on another URL from the client.
Within your OnReconnected callback you might want to just write some logic that notifys a user that they have been reconnected.
Related
I have a requirement wherein I need to perform certain action in my web application based on phone call receiving event that occurs in a third party application - Knowlarity SR calling app.
We are using Knowlarity Super Receptionist calling API to receive calls to a virtual number and then route those calls to call center Agents as per their availability. There is another web application we have built which call center agents uses to manage customers and orders. Agents login to this web application (web app in Azure) and places orders for customer who is calling over the phone from Knowlarity. Here the requirement is whenever Knowlarity routes the call to any agent and when the agent picks up the call, it should notify this action to web app (CRM) the web app should automatically redirect the same Agent to a specific page.
Please suggest a solution how I can listen to the call receiving event in Knowlarity and do some action(page redirection) on the web app side.
Thanks.
I tried writing an Api method in Web app which Konwlarity will call to send event notification with some information. Also tried implementing HttpHandler for this. Please suggest the correct approach for this. Remember that it is a Web app so multiple agents can login, they have their own session so how to handle this.
I'm using react-router's BrowserRouter and Route and Redux. I want to dispatch an action when a user leaves the site or logs out. I'm also using socket.io, but cannot rely on the disconnect because changes in pages within the site cause disconnects.
I looked at window.onbeforeunload and window.onunload, but they also don't work because they get called when I change pages in the site.
All help is appreciated :)
I'm not familiar with React/Redux, but I suspect that its because your client's socket connection is being created within the views that are being created and destroyed. That would mean that you have a persistence problem.
Since Redux is meant for state management, you should store your socket instance there. If your user signs out then you can manually disconnect and discard the instance or if your user leaves your page then it will naturally just disconnect.
I have an existing ASP.NET website with a login. The login procedure is not trivial, because of routing to different front ends on different servers based on which user logs in. There is also some communication/login going on to a classic ASP website.
Now I want to start to decouple the first step of the login procedure using a tiny Angular2 app. Basically this should just collect the user and password and leave the login validation etc. to the existing ASP.NET logic. So from my naive point of view, this is the same as filling out user and password on my existing ASP.NET page and clicking the submit button.
I know that I can make http requests using angular2 and have successfully done so calling SOAP based web services which are part of the login validation process.
I have the idea that I can somehow fake the http request which is executed when submitting the login form in the existing ASP.NET page. But as far as I understand it right now, even if I could make an http request to my login.aspx site the response I would get would sit in my Angular2 obervable as text whereas I would like to leave my Angular2 app and "simply use" that response.
I am not even sure what questions to ask ... but how do I do that?
What have I not considered?
Some options I have:
It would be possible to change parts of the existing ASP.NET page(s).
I think it would be OK to open a new browser tab in which the existing ASP.NET app would be displayed.
We need to use static method's to make Ajax calls.
I didn't really understand the whole picture, but I know that you can load an ASP.NET partial view from an Angular2, or even make an http call to an ASP.NET Controller to get your data.
So I don't really understand your problem there, since the question is not clear, but you could make an http call to an ASP.NET Controller that would manage calls to your different WebServices.
Some clarifications would be helpful for a more detailled answer.
I have a system which uses Jquery AJAX calls to an .ASMX web service for INTERNAL and STATELESS use.
For example, after pressing a button, a Jquery call is launched to insert a new user).
Now, the problem is, that the Jquery AJAX call is dynamically inserted by the user. The user can decide what code of Javascript to put, so he may call a AddUser() function in the web service, or do something else. Then, that piece of code is inserted dynamically and the button will add all the Javascript that the user wrote into the HTML content.
In the case the user decides to call the Jquery and specifically adds a code to call the AddUser() function in the WS, how can I do it securely? How can I assure that this AJAX request is coming from the same domain?
I understand that every HTTP Request header can be manipulated, so how can I assure that the AJAX call is coming from the same site?
I remind you, the purpose of that web service is for internal uses of the system - so I don't want that an external user will read the JS code and copy it an add users as much as he wants!
I don't want to use tokens or identification. It is a stateless request and I just want to add a user but to have control of who is making the call.
I will be happy to get any suggestion. Thank you in advance!
In my opinion you can't. You either add some kind of authentication (if you have one on the site you may use the same authentication) or render a token on the page which is sent with the AJAX request. Of course in both cases you add some form of state but in my opinion the requirement to originate the request from the same site is a requirement to track state.
For example I have a web application using jQuery as a framework on the client side. Now most of the pages are functional by means of using AJAX and communicate to the server by means of using Generic Handlers (.ashx).
Now I have a problem that I am asking this to see what is the best solution for handling these request when my user session expires.
For example, a user logged in, left his browser for 15 minutes and then he pressed a button that this will create a request to the handler, now from the server side when I try to read a session variable obviously it will be empty (session expired). What is the best way to redirect the user back to the login page.
We address this situation by a slightly different approach. Instead of trying to make all the jQuery calls deal with this kind of error condition, we have implemented a parallel timeout system on the client using javascript. A minute before the ASP.NET Session would time out, we pop up a dialog on the browser to warn the user "You have been inactive and are about to be logged out. Click here to remain logged in." We included a little countdown in the dialog also. If they click to stay logged in, we send another jQuery call to the server to reset the session timeout.
So, unless the user has javascript disabled (in which case, the app doesn't work anyway), there is not a possibility that we make a jQuery call after the ASP.NET session has timed out.