Implement Site's logo management via AWS S3 adapter

[danguita]

Connects to #109.

Release notes

Releasing this one depends on #170.

What does this PR do?

This PR introduces a small library to abstract file upload operations, and integrates it into the Admin's Site management Form object to allow attaching a file from the UI and storing the public_url returned by the adapter.

The first and only available adapter is AWS S3, which needs to be configured via environment variables, as usual. These environment vars are needed at the time being:

AWS_ACCESS_KEY_ID=
AWS_SECRET_ACCESS_KEY=
AWS_REGION=eu-west-1
S3_BUCKET_NAME=gobierto-dev

Once the S3 bucket is available and the AWS credentials are reachable from the app instance, an upload process will be performed every time the User submits a new file. All files are kept from now in a UUID format file names:

How should this be manually tested?

Get into a Site edit view within the Admin namespace, and submit a new logo in the file field. In the next GET request, the new logo should be shown right above the file field is rendered:

[ferblape]

Molt bé!

[danguita]

That was easy! 😛

[ferblape]

👍 Thank you David!

Files were not visible in my bucket, I guess we needed to enforce the ACL of the object.

[danguita]

@ferblape No prob! Did you set the policy in #170 at bucket level? It worked fine for me.

[ferblape]

Ups, you are right! I'll take care.

[danguita]

My fault, I should have mentioned you there! If the policy does the job, I'd avoid passing the ACL param in FileUploader::S3 so that the library stays agnostic.

[ferblape]

Totally agree, it´s a better solution.

…

On 16 December 2016 at 19:01, David Anguita ***@***.***> wrote: My fault, I should have mentioned you there! If the policy does the job, I'd avoid passing the ACL param in FileUploader::S3 to keep the library agnostic. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#169 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AABE0CSW1WII1FO3b1X8vFkmtvur9leaks5rItIEgaJpZM4LPFQP> .

-- Fernando Blat twitter.com/ferblape Populate / Tools for civic engagement http:https://populate.tools Weekly digest of interesting links and project news getrevue.co/profile/populate