I want to create an application that acts as a vnc client which is connected to multiple servers at once. First and foremost, how do I access the VNC protocol in vb.net (make a client/server, output the display etc)? Second, how can a single client connect to multiple servers?
Thanks for the help! I take it there are no VncServer or VncClient components in the .net framework?
A .net vnc client library can be downloaded here. There are instructions in the documentation for creating c# and vb.net applications.
I don't know any component in the .net framework which can do this for you. My suggestions:
Implement one of the VNC protocols yourself in .net
Encapsulate a vnc client application.
Each time you start a client, it connects to a server, so in order to connect to 2 servers, start 2 clients.
Related
I tried to build a server for integrating the webrtc native APIs in an native app, but I am not sure about how the server should be configured, like the ICE/STUN/TURN, signaling, media server etc..
So far as I know is the open source project: https://github.com/priologic/easyrtc
Can anybody give some recommendations?
Thanks
In a WebRTC infrastructure, there are several things involved. The client part is written in JavaScript and runs on the browser.
But as you said it is a server side part. First there is a ICE/STUN/TURN server that it's used for a client to discover its public IP address if it is located behind a NAT. Depending on your requirements could not be necessary to build/deploy your own server, but use an already public (and free) existing one - here's a list. You can also deploy an open source one like Stuntman.
Then it comes the signaling part, used by two clients to negotiate and start a webrtc session. There is no standard here and you have a few options.
You can use an XMPP server with a Jingle extension. You can deploy an existing XMPP server, like OpenFire or Tigase
You can also use SIP, a protocol much more encountered for VoIP. You can use JAIN-SIP or SIP Servlets.
Or you can develop your own signaling protocol using something like websockets.
The server side options that I was giving you were Java based ones, but you can find similar for other infrastructures too.
STUN/TURN is required. Use public ones (not absolutely stable) or get a Ubuntu machine ans install from the source: https://code.google.com/p/rfc5766-turn-server/
Signaling is trivial. You just forward messages between peers. Just build a simple chat server.
Media server is whole different story and require sophisticated client-server configuration.
I have an application in C++ that needs to transmit data securely via web services to our web server.
VPN was the first choice, but out network administrator informs us that we will not support the IPSEC protocols available on Windows Mobile.
Currently we have tried implementing a SSL connection, but found we don't have the libraries for that.
Alternatively, we have been trying PocketPutty to create a SSH tunnel, but that only has a GUI interface, and we're not sure how to get that to work via programming code.
Thank you
OpenSSL supports Windows CE.
SSL 2.0 has been supported since at least CE 5.0.
SecureBlackBox is also supported.
I'm trying to make my store app communication with desktop app through websockets.
I know we can make metro app as a client and do WinRT way of communicating over.
For the desktop server part, i'm planning to write a dll that will contain server code and receive metro texts being sent over.
Can someone please tell if this is possible and how to write server code in a dll and if so should we be using winhttp for wbesockets in server side ?
Windows Store (WInRT) apps are executing in a sandbox which isolates them from network communication with other applications on the local machine (localhost). That being said, this protection can be disabled using CheckNetIsolation.exe. Visual Studio automatically does the same for debugging purposes, allowing you to call e.g. a web service on your local machine during development.
As for the desktop side; to communicate with web sockets client, you can make advantage of WinHTTP. There's a working example on MSDN.
Keep in mind, though, that any application communicating with localhost will not be certified for Windows Store and will require several additional steps to install it:
The Windows Store application package will need to be sideloaded since it won't be published in Windows Store.
Any desktop component it communicates with will need to be installed separately the same way as any other desktop application.
Using CheckNetIsolation.exe loopback exemption will need to be added for the Windows Store app.
If you can avoid it, I definitely suggest you don't try communicating directly with a desktop application from you Windows Store app.
WCF gives me a whole bunch of capabilities to connect two applications that are running on the same machine.
But which is the best one for my use case?
I want to develop a local application (server) which provides functionality to connect to a webserver. I want to connect from various Office application and WPF-applications to the local "server" (MVC) to send messages, files etc. to the webserver.
Is System.IO.Pipes.PipeStream the right way?
I think you need not to dial with stream directly.
If your Office apps support this, the NamedPipe binding, mentioned by Aron, will be probably the best choice.
You can also use port sharing to allow both your services to re-use single port.
I have the following scenario:
We develop a silverlight 4 app for our customers, that will be used as an out-of-browser app. The app is working offline, i.e. app and database are on the users local machine. The app is using WCF-RIA-services to connect to the local database. The database will be an SQL Server Express, SQL Server CE or MySQL. We are using MVVMLight and MEF.
An external webserver is only used for updating the app from time to time or adding new modules to the app. To achieve this we do something similar as shown in Jeremy Likness blog (http://www.wintellect.com/CS/blogs/jlikness/archive/2010/05/25/silverlight-out-of-browser-dynamic-modules-in-offline-mode.aspx )
The reasons why we are doing such a scenario are complex. But to keep a long story short it is mainly for compatibility reasons for a later online version and we don't want to use WPF. So we need to get this working with Silverlight and WCF-RIA services.
Ok, that's the scenario and here's the question:
Do we need a local webserver in this scenario? The app is programmatically installed as out-of-browser, the database is local and connected via WCF-RIA.
If yes, which webserver would be sufficient? It should be installed and configured via an initial setup that is executed by the customer. The customer should not have to do anything with configuring the webserver.
Any other ideas or comments on this scenario? Any other possible solutions for this?
Thanks for your help
Dirk
silverlight wasn't meant to be used this way I think. So it would be like when you are developing app in visual studio and use Cassini to see result - everything runs locally - but you still need a web server. Maybe more info here - http://www.infoq.com/news/2010/06/WPF-vs-Silverlight
I´m not able to provide with a full answer to your problem, as we are currently facing the same problem. (WPF not being cross-platform, Very specific hardware on some clients)
But I may share some of our thoughts on our type of Thick-Silverlight-Client:
To keep deployment etc. simple we use a self-hosting process (installed as background process)
We may not use RIA as the background process has to run using Mono VM (but for MS-only solution see Can WCF RIA Services be self hosted? )
Architectural thoughts on standalone "Clients":
Depending on your requirements implementing a server for each client communicating with the "main"-server by messages (NServiceBus) may be overkill. But if you want to use a client database if offline and silverlight for ui you should consider using an event-driven-architecture.
There is a slideshow on combining "Event-Driven-Architecture" & "CQRS" with Silverlight. But i would not use it as a blueprint more like an inspiration.
http://www.slideshare.net/dennisdoomen/cqrs-and-event-sourcing-an-alternative-architecture-for-ddd