Unable to upload to s3 using pre_signed_url generated using IAM roles

Question

I use the below code to generate a pre_signed_url to upload multiple files using a single url.

```
response = s3_client.generate_presigned_post(
            bucket_name,
            "${filename}",
            Fields=fields,
            Conditions=[["starts-with", "$key", ""]],
            ExpiresIn=expiration,
        )

```

I tested it out locally and it works but the url genrated in the ecs service that is deployed is throughing the following error
`requests.exceptions.SSLError: HTTPSConnectionPool(host='.s3.amazonaws.com', port=443): Max retries exceeded with url: / (Caused by SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:2423)')))`

How to resole the issue i am facing , i looked into it and this github [issue](https://github.com/boto/boto3/issues/3477) but we are not using ACL , can anyone help me with this

Jai Shankar K S · Accepted Answer

I have found the solution for the above issue,It was because of the another parameter x-amz-security-token that was not considered because of the response schema defined.

Manoj Kengudelu · Answer

The eror says an EOF (End of File) during an SSL handshake, might be related to the SSL/TLS communication when generating a pre-signed URL for S3 upload. Please check that you are using the correct S3 bucket name and AWS region when generating the pre-signed URL. Also check that the region and bucket specified in the code match the actual S3 bucket and region.

Unable to upload to s3 using pre_signed_url generated using IAM roles

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