botocore.exceptions.ClientError: The Content-Length header is required

[engchina]

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Dify version

v1.0.0

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

While using s3 compatible object storage, and upload a file, error will occur:

it's an issue of boto3 >= 1.36.1, even latest one 1.37.8. it's okay of version boto3==1.35.99. reference: https://github.com/boto/boto3/issues/4398

✔️ Expected Behavior

no error

❌ Actual Behavior

error log:

ent_version=1.0.0 (Caused by SSLError(SSLEOFError(8, '[SSL: UNEXPECTED_EOF_WHILE_READING] EOF occurred in violation of protocol (_ssl.c:1010)'))).
2025-03-07 08:18:06.962 ERROR [Dummy-2] [ext_storage.py:79] - Failed to save file upload_files/5d097fc2-5b69-4ac1-919b-195e621466b2/fbb713de-4a71-4094-9925-54ecda784719.txt
Traceback (most recent call last):
  File "/app/api/extensions/ext_storage.py", line 77, in save
    self.storage_runner.save(filename, data)
  File "/app/api/extensions/storage/oracle_oci_storage.py", line 26, in save
    self.client.put_object(Bucket=self.bucket_name, Key=filename, Body=data)
  File "/app/api/.venv/lib/python3.12/site-packages/botocore/client.py", line 570, in _api_call
    return self._make_api_call(operation_name, kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/botocore/context.py", line 124, in wrapper
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/botocore/client.py", line 1031, in _make_api_call
    raise error_class(parsed_response, operation_name)
botocore.exceptions.ClientError: An error occurred (MissingContentLength) when calling the PutObject operation: The Content-Length header is required
2025-03-07 08:18:06.964 ERROR [Dummy-2] [app.py:875] - Exception on /console/api/files/upload [POST]
Traceback (most recent call last):
  File "/app/api/.venv/lib/python3.12/site-packages/flask/app.py", line 917, in full_dispatch_request
    rv = self.dispatch_request()
         ^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask/app.py", line 902, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)  # type: ignore[no-any-return]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask_restful/__init__.py", line 489, in wrapper
    resp = resource(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask/views.py", line 110, in view
    return current_app.ensure_sync(self.dispatch_request)(**kwargs)  # type: ignore[no-any-return]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask_restful/__init__.py", line 604, in dispatch_request
    resp = meth(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/controllers/console/wraps.py", line 147, in decorated
    return view(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/libs/login.py", line 94, in decorated_view
    return current_app.ensure_sync(func)(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/controllers/console/wraps.py", line 27, in decorated
    return view(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/flask_restful/__init__.py", line 696, in wrapper
    resp = f(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^
  File "/app/api/controllers/console/wraps.py", line 86, in decorated
    return view(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/controllers/console/files.py", line 72, in post
    upload_file = FileService.upload_file(
                  ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/services/file_service.py", line 67, in upload_file
    storage.save(file_key, content)
  File "/app/api/extensions/ext_storage.py", line 80, in save
    raise e
  File "/app/api/extensions/ext_storage.py", line 77, in save
    self.storage_runner.save(filename, data)
  File "/app/api/extensions/storage/oracle_oci_storage.py", line 26, in save
    self.client.put_object(Bucket=self.bucket_name, Key=filename, Body=data)
  File "/app/api/.venv/lib/python3.12/site-packages/botocore/client.py", line 570, in _api_call
    return self._make_api_call(operation_name, kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/botocore/context.py", line 124, in wrapper
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/app/api/.venv/lib/python3.12/site-packages/botocore/client.py", line 1031, in _make_api_call
    raise error_class(parsed_response, operation_name)
botocore.exceptions.ClientError: An error occurred (MissingContentLength) when calling the PutObject operation: The Content-Length header is required

[dosubot[bot]]

The error you're encountering is related to the boto3 library versions >= 1.36.1, where the Content-Length header is required but not automatically set during file uploads to S3-compatible storage. This issue does not occur with boto3 version 1.35.99.

To resolve this, you can try the following approaches:

1. Downgrade boto3: Temporarily downgrade to boto3 version 1.35.99, where this issue does not occur.

2. Manually Set Content-Length: Modify the code to manually set the Content-Length header when calling the put_object method. You can calculate the content length from the data being uploaded and include it in the request.

3. Check for Updates: Keep an eye on updates from the boto3 library or related discussions, as a fix might be released in future versions.

These steps should help you work around the issue until a permanent fix is available in the boto3 library.

To continue talking to Dosu, mention @dosu.

---

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[engchina]

Is it a good solution? I see https://github.com/boto/boto3/issues/4398, many other projects have done a downgrade.

Downgrade boto3: Temporarily downgrade to boto3 version 1.35.99, where this issue does not occur.