I have a C# app that calls my WCF on my server.
At some time I will want to move part of my uploading process from client to server to a different server.
So, this is what I was going to do.
My desktop application invokes a WCF hosted on my server using the full DNS name ~ www.mysite.com.
That [web method] will then return an IP address to the client.
The client will then upload images to a DIFFERENT server that is accessible only by an IP address.
The idea is that if my app is successful and I would need to 'load-balance' the image uploads I would then have a mechanism to specify different destination servers to my clients.
So, I started looking in StackOverFlow for a way to dynamically set the IP address/End-Point of my WCF. This was easy to do for web services but it seems to me a bit more difficult for WCF.
Needless to say I was about to go through the answers here but came across a comment saying that the WCF needs to be using DNS.
Is this true?
As this is the only server I got and it is using DNS (I have not got access to a secondary server yet) I cannot test this out.
Are both things possible?
When you write a web service client, you can change the server endpoint programmatically. It has nothing to do with using WCF or not in the server.
MyClient client = new MyService.MyClient();
client.Endpoint.Address = new EndpointAddress(new Uri("target URL"));
client.Open();
You could find more details on the EndPointAddress MSDN reference.
Hope I helped!
MyClient client = new MyService.MyClient();
client.Endpoint.Address = new EndpointAddress(new Uri("target URL"));
client.Open();
It works, we could also use
myService.MyClient client = new myService.MyClient ();
//enter code here, when the service is created as wcf application
Related
I am going to build application (Asp.net C#) to connect RabbitMQ server which is in another country.
So my question is how to connect that server.
I already installed RabbitMQ Client from NuGet Packages.
Is that needed to run RabbitMQ service in my local machine ?
Need to install RabbitMQ Server in my local machine?
From Client some of the parameters i got like
UserName, Password, HostName, Certificate with private key.
I am curious to know which are the basic steps to connect that server from my localhost application.
Can someone provide blog to refer ?
I already tried with different steps but not able to connect.
string vCertSubjectName = "CN=DevRepo, OU=IT, O=OLX, L=KTM, S=Surrey, C=UK";
ConnectionFactory factory = new ConnectionFactory();
factory.AuthMechanisms = new AuthMechanismFactory[] { new ExternalMechanismFactory() };
factory.HostName = "195.168.0.15";
factory.Port = 5673;
factory.Ssl.Certs = getCertificate(vCertSubjectName);
factory.Ssl.ServerName = System.Net.Dns.GetHostName();
factory.Ssl.Enabled = true;
factory.Ssl.Version = SslProtocols.Tls12;
IConnection connection = factory.CreateConnection();
Error coming like connection.start was never received, likely due to a network timeout."
There are very good simple examples of how to write code to send and receive messages to/from RabbitMQ on their site.
Get those examples; set up a RabbitMQ server on your local network; build the examples and verify they work. Once you know how to send/receive to/from a known instance, you can change the connection properties in your send program to point it to the RabbitMQ instance elsewhere.
I would also suggest you do a ping to the IP address of the foreign RabbitMQ server to get an idea of actual transit times. That should give you some idea if the network timeout is a valid issue.
PS. You will need a valid login and password for the RabbitMQ server before it will accept any messages from you. When you build the example programs above as long as you are on the same physical machine where RabbitMQ is running, you can use the default login and password of guest/guest. By default this will NOT work from another machine due to default security configuration of RabbitMQ.
I'm approaching to WCF Service, starting with the tutorial provided by Microsoft. I created a very simple WCF Service (CalculatorService) and I've some doubts about the EndpointAddress of this service.
When I create the WCF Host, I set the Endpoint like this:
Uri baseAddress = new Uri("http://localhost:8000/GettingStarted/");
// Step 2 Create a ServiceHost instance
ServiceHost selfHost = new ServiceHost(typeof(Service1), baseAddress);
// Step 3 Add a service endpoint.
selfHost.AddServiceEndpoint(typeof(IService1), new WSHttpBinding(), "CalculatorService");
Everything works if I debug the entire solution, but, if I launch the WCFHost executing its .exe file, launching also the application of the Client gives me the following exception:
System.ServiceModel.EndpointNotFoundException: No endpoint listening in http://localhost:8732/Design_Time_Address/WcfServiceLibrary/Service1/.
The fact is that if I try to open a browser and search the address http://localhost:8000/GettingStarted/, I get correctly the page of the Service. I suppose that the Service is hosted at one address and the Client tries to access to it via a different one.
Could anyone help me to solve this issue?
If you have, in the client code, hard coded this address http://localhost:8732, then change it there. But your client is probably (you didn't put that info unfortunately in your question) automatically generated. In that case client config is in App.config file(if we are talking about your solution), and in config file of the .exe file when you build your project. You should look into your [ClientApplicationName].exe.config file and update the endpoint address to port 8000.
How to register client on server to listen some change? I want to notify my client and send some data when something changed on my server. Also, I use NetTcpBinding. I tried many examples, but I can't get method from server to register in. I don't have any config file.
Thanks in advance.
There is example of registering client on server.
ChannelFactory<ITrending> factory = new ChannelFactory<ITrending>(
new NetTcpBinding(), new EndpointAddress(#"net.tcp://localhost:6000/ITrending"));
proxy = factory.CreateChannel();
You can use the CallBack functionality in WCF services , it can be used for sending the changes in any entity or object value. In this case, Client must act as a server and server as a Client to receive the updates based on the method in the Client which is receiving the changes.
More detailed explanation : http://www.dotnetcurry.com/wcf/721/push-data-wcf-callback-service
So I have two websites that I am using SignalR and I have the following in both my Global.asax files:
HubConfiguration hubConfig = new HubConfiguration();
hubConfig.EnableCrossDomain = true;
RouteTable.Routes.MapHubs(hubConfig);
I have a server side event side and I get the hub context to send a message to all listening clients:
var signalrContext = GlobalHost.ConnectionManager.GetHubContext<Notifications.OfferHub>();
signalrContext.Clients.All.receiveNotification("hello world");
The same event happens server side on both websites and I would like to broadcast this cross-domain to all listening clients. I am thinking this is not possible server side because I will not be able to get the HubContext for both websites change the hub.url server side.
Unless anyone has any other suggestions?
Well, it took me a minute to realize what do here. Thanks to David Fowler for his help and SignalR awesomeness! I ended up adding a ServiceReference in each website to a web service in the other website and calling a "Broadcast" WebMethod. The web service webmethod just gets the current SignalR context and broadcasts my message to all clients listening on the respective website.
I have a webservice hosted in my IIS... I need to find out the clientIP address when the client use my service directly
like http://MyIpAddress/MyApplication/MyWebServiceClass.asmx
and is it possible to read file from the client machine? If so how can I do it?
You should have a plain old HTTP Context at your disposal in ASMX:
HttpContext.Current.Request.UserHostAddress
Also re: "Is it possible to read a file from the client machine" - this all depends on your implementation. If you're making a web service for your intranet and you work in a small(ish) business environment, you probably can given the proper planning w/ your network guy (not advocating this as a good idea, just a possibility).
To further elaborate, if you are in your small office environment and you get a request from 192.168.1.55 and you know that every client machine in your network has a lastLoginData.txt file in the C drive, AND you have the appropriate configurations for UNC access to the client by the machine hosting the service, getting at "\\" + ip + "\c$\lastLoginData.txt" would be possible. You'd be creating a potentially horrible security issue for yourself, but it'd be possible.
In most normal cicumstances though, no, you will not have access to client disk from the Web Service - some sort of upload will likely have to occur first.
Try calling
Request.UserHostAddress
HttpRequest.UserHostAddress Property
With regards to accessing a file from the client, this would need be achieved by first uploading the file to the server.
Checkout the following on uploading files to a web service:
ASMX file upload
Create a simple file transfer Web service with .NET
String ip = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (string.IsNullOrEmpty(ip))
{
ip = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
}
else
{
ip=ip.Split(',')[0];
}
return ip;