query_server_information returning "404"

Evan Hale · August 24, 2022

Calling ftrack_api.Session(auto_connect_event_hub=True, **auth) fails at the "query_server_information" action call. It returns a 404 "Resource Not Found" html response. Ftrack is up and running and I can access it fine via the browser. I tried removing the event hub arg which made no difference. I am sure my creds are correct and tested the same call on a different server which worked fine. Logs attached.

Server reported error in unexpected format. Raw error was: <!DOCTYPE html>
<html>
<head>
    <title>Server Error 404</title>
    <style type="text/css">
        body {
            background: #282e34;
            color: white;
            color: rgba(255, 255, 255, 0.9);
            font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif;   
            font-size: 1.2em;
            font-weight: normal;
            line-height: 1.6;
            text-align: center;
        }
        h1 {
            font-size: 2.4m;
            font-weight: normal;
            margin-bottom: 0;
            color: #935ba2;
        }
        a {
            color: #935ba2;
        }
        #container {
            max-width: 600px;
            margin: 50px auto;
        }
        .footer {
    <div class="footer">
        Please contact <a href="mailto:support@ftrack.com">support@ftrack.com</a> if the problem persists.
    </div>
</body>
</html>
Traceback (most recent call last):
  File "C:\Users\ehale\.virtualenvs\ftrack-scripts-s-mYXya3\lib\site-packages\ftrack_api\session.py", line 1626, in call
    result = self.decode(response.text)
  File "C:\Users\ehale\.virtualenvs\ftrack-scripts-s-mYXya3\lib\site-packages\ftrack_api\session.py", line 1773, in decode        
    return json.loads(string, object_hook=self._decode)
  File "C:\Python38\lib\json\__init__.py", line 370, in loads
    return cls(**kw).decode(s)
  File "C:\Python38\lib\json\decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Python38\lib\json\decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
          
          Traceback (most recent call last):
  File "C:\Users\ehale\.virtualenvs\ftrack-scripts-s-mYXya3\lib\site-packages\ftrack_api\session.py", line 1626, in call
    result = self.decode(response.text)
  File "C:\Users\ehale\.virtualenvs\ftrack-scripts-s-mYXya3\lib\site-packages\ftrack_api\session.py", line 1773, in decode
    return json.loads(string, object_hook=self._decode)
  File "C:\Python38\lib\json\__init__.py", line 370, in loads
    return cls(**kw).decode(s)
  File "C:\Python38\lib\json\decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Python38\lib\json\decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Python38\lib\runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Python38\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "c:\Users\ehale\.vscode\extensions\ms-python.python-2022.12.1\pythonFiles\lib\python\debugpy\adapter/../..\debugpy\launcher/../..\debugpy\__main__.py", line 39, in <module>
    cli.main()
  File "c:\Users\ehale\.vscode\extensions\ms-python.python-2022.12.1\pythonFiles\lib\python\debugpy\adapter/../..\debugpy\launcher/../..\debugpy/..\debugpy\server\cli.py", line 430, in main
    run()
  File "c:\Users\ehale\.vscode\extensions\ms-python.python-2022.12.1\pythonFiles\lib\python\debugpy\adapter/../..\debugpy\launcher/../..\debugpy/..\debugpy\server\cli.py", line 284, in run_file
    runpy.run_path(target, run_name="__main__")
  File "c:\Users\ehale\.vscode\extensions\ms-python.python-2022.12.1\pythonFiles\lib\python\debugpy\_vendored\pydevd\_pydevd_bundle\pydevd_runpy.py", line 321, in run_path
    return _run_module_code(code, init_globals, run_name,
  File "c:\Users\ehale\.vscode\extensions\ms-python.python-2022.12.1\pythonFiles\lib\python\debugpy\_vendored\pydevd\_pydevd_bundle\pydevd_runpy.py", line 135, in _run_module_code
    _run_code(code, mod_globals, init_globals,
  File "c:\Users\ehale\.vscode\extensions\ms-python.python-2022.12.1\pythonFiles\lib\python\debugpy\_vendored\pydevd\_pydevd_bundle\pydevd_runpy.py", line 124, in _run_code
    exec(code, run_globals)
  File "c:\Users\ehale\Repos\ftrack\ftrack-scripts\ftrack-scripts\interactive.py", line 16, in <module>
    session = ftrack_api.Session(auto_connect_event_hub=True, **auth)
  File "C:\Users\ehale\.virtualenvs\ftrack-scripts-s-mYXya3\lib\site-packages\ftrack_api\session.py", line 237, in __init__       
    self._server_information = self._fetch_server_information()
  File "C:\Users\ehale\.virtualenvs\ftrack-scripts-s-mYXya3\lib\site-packages\ftrack_api\session.py", line 1340, in _fetch_server_information
    result = self.call([{'action': 'query_server_information'}])
  File "C:\Users\ehale\.virtualenvs\ftrack-scripts-s-mYXya3\lib\site-packages\ftrack_api\session.py", line 1634, in call
    raise ftrack_api.exception.ServerError(error_message)
ftrack_api.exception.ServerError: <exception str() failed>

Patrick Boucher ftrack · August 24, 2022

Hi Evan,

You say that you ran the same code:

ftrack_api.Session(auto_connect_event_hub=True, **auth)

on another computer system and it worked?

If that's the case, I'd be surprised if it was the ftrack server itself that was being temperamental.

Are both computers on the same network?
Is there a proxy or firewall between the failing computer and ftrack?
Is this error consistently reproducible (or sporadic)?

Thanks,
Patrick

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