RTD Demo will not connect to Lightstreamer Server

[lxnay]

It looks like a network issue (firewall?).
Please have a look using wireshark and see what's going on at the NIC level.

[krohnjw]

It looks like a network issue (firewall?).
Please have a look using wireshark and see what's going on at the NIC level.

Sorry it took so long to reply - I got caught up doing other things. Firewall is disabled to rule out potential issues there. Wireshark doesn't show a single outgoing packet headed to the server. I've specified the URL as both a FQDN and IP (in case name resolution was failing for some reason) and still don't see any packets heading for the destination as expected.

[lxnay]

Just a question and a request, if possible.
Question: what do you mean with "I've changed this and added some login credentials to the LightstreamerClient.Start method so that it should successfully connect to our Lightstreamer server". What login credentials? Are you talking about HTTP AUTH? Can I have a code snippet that shows how you did that? Are you running behind a proxy? Please note anyway that all this is outside the scope of our, very simple demo.
Request: Could I have a diff between the demo code and your changes, or alternatively, could you attach your code here?

Thanks

[krohnjw]

Just a question and a request, if possible.
Question: what do you mean with "I've changed this and added some login credentials to the LightstreamerClient.Start method so that it should successfully connect to our Lightstreamer server". What login credentials? Are you talking about HTTP AUTH? Can I have a code snippet that shows how you did that? Are you running behind a proxy? Please note anyway that all this is outside the scope of our, very simplified demo.
Request: Could I have a diff between the demo code and your changes, or alternatively, could you attach your code here?

Thanks

Changed in rtdserver.cs

     private const string pushServerHost = "http://ourhostname.here";
        // port, if different from 80
        private const string pushServerPort = "80";

Changed in LightstraemerClient.CS:Start(string pushServerUrl)

            // Added login credentials
            connInfo.User = "myUsername";
            connInfo.Password = "myPassword";

I've added some output to RtdServer.cs:ServerStart(IRTDUpdateEvent CallbackObject) to verify the url it is using to instantiate the connection as well as when it passes - we never reach "Exited Connection".

            flowForm.AppendExcelLog("Connecting to " + pushServerUrl);
            new ThreadStart(delegate() { lsClient.Start(pushServerUrl); }).Invoke();
            flowForm.AppendExcelLog("Exited Connection");

We are not running behind any sort of proxy. All I am trying to do is get the RTD demo to connect to our lightstreamer server as it says it should be able to right in the README.

Obviously you could test the application against your Lightstreamer server
installed somewhere, but in this case, you have to recompile the source code
after having changed "pushServerHost" and "pushServerPort" variables in
RtdServer.cs.

This is where the issue comes in to play. I don't see a single packet headed towards our server at all in wireshark, despite it seemingly being as simple as changing the host/port configuration and recompiling. The GUI launches fine and it says it's connecting to the appropriate host/port but I see no traffic in wireshark backing this up.

If you'd like to supply an email I can email the 2 changed files if you would like to see the full source. The only changes are detailed above though.

[lxnay]

Thanks,
I'll have a look at the issue in the next 24/48 hours (hopefully even before).
In the meantime, you could send us the source (please strip off sensible information from it) at support@lightstreamer.com

Regards,

[krohnjw]

Thanks,
I'll have a look at the issue in the next 24/48 hours (hopefully even before).
In the meantime, you could send us the source (please strip off sensible information from it) at support@lightstreamer.com

Regards,

Sent as requested.

[lxnay]

Thanks for your patience,
I just reviewed your changes and didn't see anything that could cause the freeze on the connection attempt (the socket in use is a blocking socket, hence the freeze if the server cannot be reached, until timeout, which is set at ~30 seconds by default).
I have two suspects by the way:
1. The server cannot be reached, might be some firewall? Can you reach the server from the browser (just connect to the same URL)
2. More probable: you are not using your re-compiled .dll. You probably installed the demo and your Visual Studio is not overriding registry settings created by the demo installation. This is easy to fix, just open the registry editor (regedit) and look for the following keys:

- HKEY_CLASSES_ROOT\CLSID\{2368E0E6-1ED6-3C39-8FAE-45B4A9FB53F3}\InprocServer32\CodeBase
- HKEY_CLASSES_ROOT\CLSID\{2368E0E6-1ED6-3C39-8FAE-45B4A9FB53F3}\InprocServer32\1.0.0.0\CodeBase

[or just search through the whole registry for RTDLibraryExcelDemo.dll]

Make sure to overwrite the .dll at the path contained in the keys above or provide a valid path to your .dll by changing those default values.