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Friends, I think it's finally time to store the uploaded files up... in the cloud. We're going to use Amazon S3. But thanks to Flysystem, we could easily use a different service - they have a bunch of adapters. Google again for OneupFlysystemBundle... and click into their docs so we can see how to implement the s3 adapter. Search for S3 and... there it is.
The first thing we need is this
aws/aws-sdk-php package. Copy that, move over to your terminal and run:
composer require aws/aws-sdk-php
While we're waiting for that, let's create the S3 bucket that will store our stuff! I'm already logged into the S3 section of AWS. Click "Create bucket" and let's call it
sfcasts-spacebar. Choose whatever region makes sense for you - but remember that, because you'll need it later.
On the next screen, if you need encryption or logging or any of these things, check them. But we'll just click next again to get to permissions. There are a few things we need to do here. First, uncheck the two top boxes for "Block new public ACLs" and "Remove public access granted through public ACLs". By unchecking these boxes, we can now have private files and public files all in the same bucket. Click "Next" again and then "Create bucket".
Awesome! Bucket done! To be able to actually access this bucket... I'm going to open an new tab for the IAM service. Click "Users" and add a new user. Let's call it:
Okay. Check yes for "programmatic access", but don't check console access. This user will exist solely so we can use its credentials in our app to talk to S3.
For permissions, this is always the tricky part, at least for me. There are a lot of existing "policies" that can grant different permissions to different services... I'm going to open another tab to IAM and click to create a new policy.
There's a builder to help create the policy... or you can click the JSON tab to do it yourself. So... what do we put here? Fortunately, Flysystem has our back. In its docs for AWS S3, scroll down and... nice! It gives us the IAM permissions we need! Copy that, go back, and paste. Tweak the bucket name to be our bucket name. Let's see... it's
sfcasts-spacebar. Back on the policy, paste that in both spots.
This policy basically gives the new user full access to this specific bucket. Click "Review policy" and give it a name, how about
sfcasts-spacebar-full-s3-bucket-access. Ok, create policy!
With that done, close that tab and go back to the original IAM tab where we're creating our new user. Click the little refresh button and search for
sfcasts. The second policy was from me testing this earlier. Check the first box and hit "Next". Skip the tags... looks good... and create user!
Congrats! The hardest part is over! This gives us two things we need: a key and a secret. Next: let's set these as environment variables in our app and configure Flysystem to talk to S3!