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[Bug 2028169] [NEW] TypeError: Object of type bytes is not JSON serializable when uploading heat template via GUI with get_file parameter

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Public bug reported:

on horizon 22.1.0+
using template:
heat_template_version: 2021-04-16

description: Simple template to deploy a single compute instance

resources:
  my_instance:
    type: OS::Nova::Server
    properties:
      key_name: DEPLOYER_key
      image: b5a4921a-2f15-4452-bc22-3b13dcf3ae0f
      flavor: m1.tiny
      user_data: { get_file: https://github.com/ruanyf/simple-bash-scripts/blob/master/scripts/hello-world.sh }

we are getting: error unable to form submit.
and in the logs:
nginx error

2023/07/10 20:18:18 [warn] 1043565#1043565: *6359589 an upstream response is buffered to a temporary file /var/cache/nginx/uwsgi_temp/9/14/0000071149 while reading upstream, client: 10.6.81.9, server: , request: "POST /dashboard/project/stacks/select_template HTTP/1.1", upstream: "uwsgi://unix:///var/lib/horizon/openstack-dashboard-uwsgi.sock:", host: "XXX", referrer: "https://XXX/dashboard/project/stacks/";
2023/07/10 20:18:23 [info] 1043565#1043565: *6359589 client 10.6.81.9 closed keepalive connection (104: Connection reset by peer)

horizon error

{"Description": "Simple template to deploy a single compute instance",
"Parameters": {}, "Environment": {"resource_registry": {"resources":
{}}, "parameters": {}, "parameter_defaults": {}, "event_sinks": []}}

[pid: 1038943|app: 0|req: 51437/411436] 10.6.81.10 () {32 vars in 382 bytes} [Mon Jul 10 19:47:16 2023] GET /dashboard/auth/login/ => generated 9711 bytes in 61 msecs (HTTP/1.0 200) 9 headers in 399 bytes (1 switches on core 13)
ERROR django.request Internal Server Error: /dashboard/project/stacks/select_template
Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/usr/lib/python3.9/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/lib/python3.9/site-packages/horizon/decorators.py", line 51, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python3.9/site-packages/horizon/decorators.py", line 35, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python3.9/site-packages/horizon/decorators.py", line 35, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python3.9/site-packages/horizon/decorators.py", line 111, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python3.9/site-packages/horizon/decorators.py", line 83, in dec
    return view_func(request, *args, **kwargs)
  File "/usr/lib/python3.9/site-packages/django/views/generic/base.py", line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "/usr/lib/python3.9/site-packages/django/views/generic/base.py", line 98, in dispatch
    return handler(request, *args, **kwargs)
  File "/usr/lib/python3.9/site-packages/django/views/generic/edit.py", line 142, in post
    return self.form_valid(form)
  File "/usr/lib/python3.9/site-packages/horizon/forms/views.py", line 191, in form_valid
    exceptions.handle(self.request)
  File "/usr/lib/python3.9/site-packages/horizon/forms/views.py", line 188, in form_valid
    handled = form.handle(self.request, form.cleaned_data)
  File "/usr/lib/python3.9/site-packages/heat_dashboard/content/stacks/forms.py", line 274, in handle
    return self.next_view.as_view()(request, **kwargs)
  File "/usr/lib/python3.9/site-packages/django/views/generic/base.py", line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "/usr/lib/python3.9/site-packages/django/views/generic/base.py", line 98, in dispatch
    return handler(request, *args, **kwargs)
  File "/usr/lib/python3.9/site-packages/django/views/generic/edit.py", line 133, in get
    return self.render_to_response(self.get_context_data())
  File "/usr/lib/python3.9/site-packages/horizon/forms/views.py", line 144, in get_context_data
    context = super().get_context_data(**kwargs)
  File "/usr/lib/python3.9/site-packages/horizon/forms/views.py", line 77, in get_context_data
    context = super().get_context_data(**kwargs)
  File "/usr/lib/python3.9/site-packages/horizon/forms/views.py", line 56, in get_context_data
    context = super().get_context_data(**kwargs)
  File "/usr/lib/python3.9/site-packages/django/views/generic/edit.py", line 66, in get_context_data
    kwargs['form'] = self.get_form()
  File "/usr/lib/python3.9/site-packages/horizon/forms/views.py", line 179, in get_form
    return form_class(self.request, **self.get_form_kwargs())
  File "/usr/lib/python3.9/site-packages/heat_dashboard/content/stacks/views.py", line 185, in get_form_kwargs
    kwargs = super(CreateStackView, self).get_form_kwargs()
  File "/usr/lib/python3.9/site-packages/django/views/generic/edit.py", line 38, in get_form_kwargs
    'initial': self.get_initial(),
  File "/usr/lib/python3.9/site-packages/heat_dashboard/content/stacks/views.py", line 181, in get_initial
    initial['parameters'] = json.dumps(self.kwargs['parameters'])
  File "/usr/lib64/python3.9/json/__init__.py", line 231, in dumps
    return _default_encoder.encode(obj)
  File "/usr/lib64/python3.9/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/lib64/python3.9/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "/usr/lib64/python3.9/json/encoder.py", line 179, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type bytes is not JSON serializable
[pid: 1038938|app: 0|req: 51430/411437] 10.6.81.9 () {64 vars in 1378 bytes} [Mon Jul 10 19:47:14 2023] POST /dashboard/project/stacks/select_template => generated 768236 bytes in 2470 msecs (HTTP/1.1 500) 6 headers in 182 bytes (4 switches on core 5)

** Affects: horizon
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2028169

Title:
  TypeError: Object of type bytes is not JSON serializable when
  uploading heat template via GUI with get_file parameter

Status in OpenStack Dashboard (Horizon):
  New

Bug description:
  on horizon 22.1.0+
  using template:
  heat_template_version: 2021-04-16

  description: Simple template to deploy a single compute instance

  resources:
    my_instance:
      type: OS::Nova::Server
      properties:
        key_name: DEPLOYER_key
        image: b5a4921a-2f15-4452-bc22-3b13dcf3ae0f
        flavor: m1.tiny
        user_data: { get_file: https://github.com/ruanyf/simple-bash-scripts/blob/master/scripts/hello-world.sh }

  we are getting: error unable to form submit.
  and in the logs:
  nginx error

  2023/07/10 20:18:18 [warn] 1043565#1043565: *6359589 an upstream response is buffered to a temporary file /var/cache/nginx/uwsgi_temp/9/14/0000071149 while reading upstream, client: 10.6.81.9, server: , request: "POST /dashboard/project/stacks/select_template HTTP/1.1", upstream: "uwsgi://unix:///var/lib/horizon/openstack-dashboard-uwsgi.sock:", host: "XXX", referrer: "https://XXX/dashboard/project/stacks/";
  2023/07/10 20:18:23 [info] 1043565#1043565: *6359589 client 10.6.81.9 closed keepalive connection (104: Connection reset by peer)

  horizon error

  {"Description": "Simple template to deploy a single compute instance",
  "Parameters": {}, "Environment": {"resource_registry": {"resources":
  {}}, "parameters": {}, "parameter_defaults": {}, "event_sinks": []}}

  [pid: 1038943|app: 0|req: 51437/411436] 10.6.81.10 () {32 vars in 382 bytes} [Mon Jul 10 19:47:16 2023] GET /dashboard/auth/login/ => generated 9711 bytes in 61 msecs (HTTP/1.0 200) 9 headers in 399 bytes (1 switches on core 13)
  ERROR django.request Internal Server Error: /dashboard/project/stacks/select_template
  Traceback (most recent call last):
    File "/usr/lib/python3.9/site-packages/django/core/handlers/exception.py", line 47, in inner
      response = get_response(request)
    File "/usr/lib/python3.9/site-packages/django/core/handlers/base.py", line 181, in _get_response
      response = wrapped_callback(request, *callback_args, **callback_kwargs)
    File "/usr/lib/python3.9/site-packages/horizon/decorators.py", line 51, in dec
      return view_func(request, *args, **kwargs)
    File "/usr/lib/python3.9/site-packages/horizon/decorators.py", line 35, in dec
      return view_func(request, *args, **kwargs)
    File "/usr/lib/python3.9/site-packages/horizon/decorators.py", line 35, in dec
      return view_func(request, *args, **kwargs)
    File "/usr/lib/python3.9/site-packages/horizon/decorators.py", line 111, in dec
      return view_func(request, *args, **kwargs)
    File "/usr/lib/python3.9/site-packages/horizon/decorators.py", line 83, in dec
      return view_func(request, *args, **kwargs)
    File "/usr/lib/python3.9/site-packages/django/views/generic/base.py", line 70, in view
      return self.dispatch(request, *args, **kwargs)
    File "/usr/lib/python3.9/site-packages/django/views/generic/base.py", line 98, in dispatch
      return handler(request, *args, **kwargs)
    File "/usr/lib/python3.9/site-packages/django/views/generic/edit.py", line 142, in post
      return self.form_valid(form)
    File "/usr/lib/python3.9/site-packages/horizon/forms/views.py", line 191, in form_valid
      exceptions.handle(self.request)
    File "/usr/lib/python3.9/site-packages/horizon/forms/views.py", line 188, in form_valid
      handled = form.handle(self.request, form.cleaned_data)
    File "/usr/lib/python3.9/site-packages/heat_dashboard/content/stacks/forms.py", line 274, in handle
      return self.next_view.as_view()(request, **kwargs)
    File "/usr/lib/python3.9/site-packages/django/views/generic/base.py", line 70, in view
      return self.dispatch(request, *args, **kwargs)
    File "/usr/lib/python3.9/site-packages/django/views/generic/base.py", line 98, in dispatch
      return handler(request, *args, **kwargs)
    File "/usr/lib/python3.9/site-packages/django/views/generic/edit.py", line 133, in get
      return self.render_to_response(self.get_context_data())
    File "/usr/lib/python3.9/site-packages/horizon/forms/views.py", line 144, in get_context_data
      context = super().get_context_data(**kwargs)
    File "/usr/lib/python3.9/site-packages/horizon/forms/views.py", line 77, in get_context_data
      context = super().get_context_data(**kwargs)
    File "/usr/lib/python3.9/site-packages/horizon/forms/views.py", line 56, in get_context_data
      context = super().get_context_data(**kwargs)
    File "/usr/lib/python3.9/site-packages/django/views/generic/edit.py", line 66, in get_context_data
      kwargs['form'] = self.get_form()
    File "/usr/lib/python3.9/site-packages/horizon/forms/views.py", line 179, in get_form
      return form_class(self.request, **self.get_form_kwargs())
    File "/usr/lib/python3.9/site-packages/heat_dashboard/content/stacks/views.py", line 185, in get_form_kwargs
      kwargs = super(CreateStackView, self).get_form_kwargs()
    File "/usr/lib/python3.9/site-packages/django/views/generic/edit.py", line 38, in get_form_kwargs
      'initial': self.get_initial(),
    File "/usr/lib/python3.9/site-packages/heat_dashboard/content/stacks/views.py", line 181, in get_initial
      initial['parameters'] = json.dumps(self.kwargs['parameters'])
    File "/usr/lib64/python3.9/json/__init__.py", line 231, in dumps
      return _default_encoder.encode(obj)
    File "/usr/lib64/python3.9/json/encoder.py", line 199, in encode
      chunks = self.iterencode(o, _one_shot=True)
    File "/usr/lib64/python3.9/json/encoder.py", line 257, in iterencode
      return _iterencode(o, 0)
    File "/usr/lib64/python3.9/json/encoder.py", line 179, in default
      raise TypeError(f'Object of type {o.__class__.__name__} '
  TypeError: Object of type bytes is not JSON serializable
  [pid: 1038938|app: 0|req: 51430/411437] 10.6.81.9 () {64 vars in 1378 bytes} [Mon Jul 10 19:47:14 2023] POST /dashboard/project/stacks/select_template => generated 768236 bytes in 2470 msecs (HTTP/1.1 500) 6 headers in 182 bytes (4 switches on core 5)

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