[jira] [Commented] (ARROW-6362) [C++] S3: more flexible credential options

["Francois Saint-Jacques (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-6362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16916011#comment-16916011 ] 

Francois Saint-Jacques commented on ARROW-6362:
-----------------------------------------------

I think the exposed (high level) interface is either:
- A static credentials
- A default behavior that follows the [aws cli defaults](https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-configure.html) this can be achieved with [DefaultAWSCredentialsProviderChain](http://sdk.amazonaws.com/cpp/api/LATEST/class_aws_1_1_auth_1_1_a_w_s_credentials_provider.html).

In the code, it would translate to store the AWSCredentialsProviderChain in the Option struct. The end goal is that user don't need to change their existing credentials setup. 

{code:python}
fs = s3fs(..., auth=None)
# the default which resolves to DefaultChain
fs = s3fs(..., auth=(None, None))
# AnonymousAWSCredentialsProvider
fs = s3fs(..., auth=(access, secret))
# SimpleAWSCredentialsProvider
{code}

> [C++] S3: more flexible credential options
> ------------------------------------------
>
>                 Key: ARROW-6362
>                 URL: https://issues.apache.org/jira/browse/ARROW-6362
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Antoine Pitrou
>            Priority: Major
>
> We should perhaps allow passing an optional {{AWSCredentialsProvider}} to {{S3FileSystem::Make}}, all the while keeping an option for a (access key, secret key) pair.
> http://sdk.amazonaws.com/cpp/api/LATEST/class_aws_1_1_auth_1_1_a_w_s_credentials_provider.html



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