botocore.exceptions.ParamValidationError:

[amits121]

I am getting the following error;

botocore.exceptions.ParamValidationError: Parameter validation failed:

Invalid type for parameter ContentType, value: None, type: , valid types:

[JordonPhillips]

What operation were you calling? Could you provide some debug logs and a code snippet?

[jamesls]

Closing due to inactivity.

[bxm156]

I am getting this as well, calling PUT. My initial suspicion is that its an issue caused by another package, not a boto3 issue direclty. Here is the full stack trace:

...
File "/var/task/storages/backends/s3boto3.py", line 436, in _save
  obj.upload_fileobj(content, ExtraArgs=put_parameters)
  File "/var/task/boto3/s3/inject.py", line 431, in upload_fileobj
  File "/var/task/storages/backends/s3boto3.py", line 451, in _save_content           obj.upload_fileobj(content, ExtraArgs=put_parameters)
  File "/var/task/boto3/s3/inject.py", line 513, in object_upload_fileobj             ExtraArgs=ExtraArgs, Callback=Callback, Config=Config)                              File "/var/task/boto3/s3/inject.py", line 431, in upload_fileobj
  return future.result()
  File "/var/task/s3transfer/futures.py", line 73, in result
  return self._coordinator.result()                                                   File "/var/task/s3transfer/futures.py", line 233, in result                         raise self._exception
  File "/var/task/s3transfer/tasks.py", line 126, in __call__
  return self._execute_main(kwargs)
  File "/var/task/s3transfer/tasks.py", line 150, in _execute_main
  return_value = self._main(**kwargs)
  File "/var/task/s3transfer/upload.py", line 679, in _main
  client.put_object(Bucket=bucket, Key=key, Body=body, **extra_args)
  File "/var/task/botocore/client.py", line 253, in _api_call
  return self._make_api_call(operation_name, kwargs)
  File "/var/task/botocore/client.py", line 531, in _make_api_call
  api_params, operation_model, context=request_context)
  File "/var/task/botocore/client.py", line 586, in _convert_to_request_dict
  api_params, operation_model)
  File "/var/task/botocore/validate.py", line 291, in serialize_to_request
  raise ParamValidationError(report=report.generate_report())
botocore.exceptions.ParamValidationError: Parameter validation failed:
Invalid type for parameter ContentType, value: None, type: <class 'NoneType'>, valid types: <class 'str'>

Using:
boto3==1.4.5
botocore==1.5.40
s3transfer==0.1.10

Python 3.6

[jrief]

I'm getting this error as well, using
boto3==1.4.8
botocore==1.8.1
s3transfer==0.1.11

@JordonPhillips can't provide a code snippet here, because it's a call from a 3rd party app, aka django-filer, deeply inside a Django admin's object save.

  (... same as above ...)
  File ".../python3.6/site-packages/botocore/validate.py", line 291, in serialize_to_request
    raise ParamValidationError(report=report.generate_report())
botocore.exceptions.ParamValidationError: Parameter validation failed:
Invalid type for parameter ContentType, value: None, type: <class 'NoneType'>, valid types: <class 'str'>

The trace stack is identical with that provided by @bxm156

[bxm156]

This isn't a problem with boto, it's due to a bug in either django storages or filer. I'll link the ticket when I get to a computer

…

On Nov 24, 2017 8:10 AM, "Jacob Rief" ***@***.***> wrote: I'm getting this error as well, using boto3==1.4.8 botocore==1.8.1 s3transfer==0.1.11 @JordonPhillips <https://github.com/jordonphillips> can't provide a code snippet here, because it's a call from a 3rd party app, aka django-filer, deeply inside a Django admin's object save. (... same as above ...) File ".../python3.6/site-packages/botocore/validate.py", line 291, in serialize_to_request raise ParamValidationError(report=report.generate_report()) botocore.exceptions.ParamValidationError: Parameter validation failed: Invalid type for parameter ContentType, value: None, type: <class 'NoneType'>, valid types: <class 'str'> The trace stack is identical with that provided by @bxm156 <https://github.com/bxm156> — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#1256 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAITZKKMceq5cjjFS6O4DnDjXCi24OU-ks5s5r_ZgaJpZM4PSBbq> .

[bxm156]

@jrief

The issue is that django-storages is calling boto with an empty Content-Type, which is not allowed. This is perhaps due to a bug in either filer or django-storages. The django File object for some reason has a content-type of "None" I don't know why, but I found an improvement to the file type detection that could be made in django-storages.

jschneier/django-storages#407

[jrief]

OK, thanks for your efforts.
So, since that PR isn't merged yet, I'll try with a private fork.