Call /api/v1/Camera/0/ImageArray make ASCOMRemote freeze.

[elendil-software]

Hi,

When I try to call /api/v1/Camera/0/ImageArray the app freeze (Not Responding). I tried with the versions 1.0.1 and 1.1. I tried with my QSI Camera and with the simulator.

Here is the log :

20:27:02.572 0 0 0 WebRequestCallback Thread 4 - Request received. Is thread pool thread: True. Is background thread: True. 20:27:02.573 0 0 0 WebRequestCallback Thread 4 - Setting up new call back to wait for next request 20:27:02.573 0 0 0 WebRequestCallback Thread 4 - Processing received message. 20:27:02.595 0 0 10 RequestReceived GET URL: /api/v1/Camera/0/ImageArray, Thread: 4 20:27:02.595 0 0 10 RequestReceived Header Postman-Token = 784a5235-5ace-444f-8816-8a82ab6c2b68 20:27:02.595 0 0 10 RequestReceived Header Cache-Control = no-cache 20:27:02.595 0 0 10 RequestReceived Header Connection = keep-alive 20:27:02.595 0 0 10 RequestReceived Header Content-Type = application/x-www-form-urlencoded 20:27:02.595 0 0 10 RequestReceived Header Accept = application/json 20:27:02.595 0 0 10 RequestReceived Header Accept-Encoding = gzip, deflate 20:27:02.596 0 0 10 RequestReceived Header Host = 192.168.1.101:11111 20:27:02.596 0 0 10 RequestReceived Header User-Agent = PostmanRuntime/7.3.0 20:27:15.441 0 0 10 ImageArray ImageArray Rank: 2 20:27:15.441 0 0 10 ImageArray ImageArray Rank: 2, Length: 8328304 20:27:15.460 0 0 10 ImageArray Starting array serialisation 20:27:17.790 0 0 10 ImageArray Completed array serialisation, Length: 33339081 20:27:17.790 0 0 10 ImageArray OK - no exception. Thread: 4, Json: {"Type":2,"Rank":2,"Value":[[365,368,400,365,384,386,392,[...], 20:27:17.848 0 0 10 ImageArray Completed Encoding.GetBytes, array length: 33339081

Regards

Julien

[Peter-Simpson]

Hi Julien,

To cross check this I've just run Conform through a Remote Client camera driver to an instance of the Remote Server and it passed OK including returning ImageArray ImageArrayVariant so I'm wondering whether this is in some way related to the way the server is interacting with your network.

Please can you help me with some more information.

1. How you are sending commands to the Remote Server, e.g. a browser or the Camera remote client driver?
2. Do you have Debug logging enabled? If not please can you enable this in the Setup GUI.
3. Please can you post the entire session log rather than just an extract
4. Are you running the client and server on the same PC or on different PCs?
5. If different PCs how are they networked together?
6. Please can you post a screenshot (Alt/PrtScn) of the Camera Simulator configuration GUI.

Thanks, Peter

[elendil-software]

I think I have found why it didn't work. I was trying with Postman (https://www.getpostman.com/). And it looks like it limit the size of the returned data. I think we can close this issue. I tried again from TheSkyX and it works

[elendil-software]

The problem is there again, even with TheSkyX Here are logs and screenshot of configuration dialogs : logs.zip

[Peter-Simpson]

Hi Julien,

Thanks for the logs, you are clearly in one of the French locales but I can't tell exactly from the log files. In case this is a locale based issue I've created a test environment, based on the French(France) locale, to see if I can reproduce what you are seeing but ASCOM Remote runs fine in that environment.

I'm using Conform as the test client because it exercises every device method call and is well hardened to deal with misbehaving drivers. I suggest that we try and synchronise application versions and test methodology as a first step in getting to the bottom of this issue.

Here is what I suggest:

• Install the attached updated ASCOM Remote version, I've added some extra logging to try and determine what is happening.
• Install the attached latest Conform version.
• Start the Remote Server configured with the Camera Simulator driver
• Start Conform and check the box on the red warning dialogue to get to the main screen
• Configure Conform through the Options menu
  • Click on "Check Camera"
  • Click on "Select Driver" and select the remote camera driver from the Chooser menu
• Run a Conform test by clicking the "Check Conformance" button

Hopefully this will work with no errors.

If there are issues please can you post the Conform log, remote server and client logs.

Please can you also run the Platform Diagnostics application that you will find in Start / ASCOM Platform 6 and also post the log from this.

Regards, Peter

ASCOMRemote(1.1.6840.32205)setup.exe.zip

Conform(6.4.62.0)setup.exe.zip

[elendil-software]

Hi,

Yes, I'm from Switzerland.

Still an error. Logs 2018-09-24.zip

Regards

Julien

[Peter-Simpson]

Hi Julien,

Thanks for the logs, I'll go through them in detail to see if I can figure out what is going on and will set up a Swiss locale test environment. Its possible that this is happening because the drivers are now running in separate threads, this is a new feature that I recently added.

Please can you test whether the problem still exists when the drivers run on the main thread by unchecking the "Run drivers in separate threads" checkbox in the server configuration screen and retesting.

I couldn't see the Diagnostics log in your last ZIP file, I'd appreciate it if you can you also post this.

Many thanks, Peter

[Peter-Simpson]

Hi Julien,

One more thought, do you have the "Log Responses" checkbox checked on the main server screen? If so, please can you try a test with it unchecked, it may be that the list box is unhappy with the characters being logged from your Swiss locale.

Regards, Peter

[Peter-Simpson]

Hi Julien,

I've been able to reproduce the issue here now, it occurs only when "Log Responses" is enabled, I'll check this through tomorrow and let you have a fixed version. This was working OK but has clearly broken at some point, as you can tell, I don't usually log the JSON responses!

Regards, Peter

[elendil-software]

Hi,

Thanks.

I confirm, it works when Log Responses is disabled

Regards Julien

[Peter-Simpson]

Hi Julien,

That's good news! I've attached a new version that should now work with Log Responses enabled.

The cause of the issue was that the 1.8Mb ImageArray JSON response was more than the status text box could handle. I've now truncated displayed JSON responses to 500 characters and all seems to be well.

Please let me know how you get on.

Regards, Peter

ASCOMRemote(1.1.6842.25892)setup.exe.zip

[elendil-software]

Perfect ! Thanks

Julien

[Peter-Simpson]

Great good news Julien!

Regards, Peter