Delete files off S3

[centinel3]

Feature request:

Are there any plans to allow the user to delete/remove files off amazon S3 storage?

Thanks and will talk with you soon. -Chris

[gsuess]

Hey, this is currently not within the scope of the package. I would recommend using knox or similar to send delete request from the meteor server (not the client browser).

[centinel3]

Ok. Thanks!

With this package do you have access to Knox server side?

[gsuess]

No, but there are plenty of packages available for knox. It doens't have to be knox either there is also aws-sdk.

The reason Slingshot doesn't provide any of that, is because it is supposed to be lightweight.

Organizing and deleting files from the bucket is not something that should be handled by slingshot directives.

[centinel3]

Thanks again. Love the package! Talk with you later. -Chris

[vertangelx]

I need this feature as well. Any recommendations for a Meteor package that is lightweight enough for use with the sole purpose of deleting files?

Maybe a delete-only version of slingshot?

[gsuess]

You can try this:

Meteor.methods({
  deleteFile: function (key) {
    //TODO Check if authorization etc...

   HTTP.call("DELETE", Slingshot.S3Storage.bucketUrl("mybucket", region) + "/" + key, {
     headers: {
        authorization: Slingshot.S3Storage.signAwsV4(canonicalRequest, AWSSecretAccessKey, date, region, "s3")
     }
   });
  });
});

So you need region, canonincalRequest (see docs below), AWSSecretAccessKey and the date (yyyymmdd).

I believe future future versions of slingshot will have a canonicalRequest method that you can use as it will be needed for #5.

http:https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-query-string-auth.html

[meteorjs3000]

@gsuess How do you get canonicalRequest and date? Do you store date in Mongodb when the file was initially uploaded to S3 so you can retrieve it now when deleting that file?

[centinel3]

@gsuess
Thank you again for the nudge in the right direction. Much appreciated!

For anyone looking to delete off Amazon S3, see my code snippet below.
(be sure to download and install an Amazon SDK package from Meteor Atmosphere)

(On a server method):

AWS.config.update({
   accessKeyId: Meteor.settings.private.amazonS3.AWSAccessKeyId,
   secretAccessKey: Meteor.settings.private.amazonS3.AWSSecretAccessKey
});

var s3 = new AWS.S3();
   var params = {
   Bucket: Meteor.settings.private.amazonS3.bucket,
   Key: data.Key
};

var deleteObject = Meteor.wrapAsync(
   s3.deleteObject(params, function(error, data) {
      if(error) {
         console.log(error);
      } else {
         console.log(data);
      }
   })
);

---

Thanks again,
Chris Campbell
http:https://cleaved.com

[filipecoelho]

Hello @centinel3, what would be the data.Key?

[filipecoelho]

Hum, now I did!!
Is the name of the file or the real path key created at the time of storage. In my case it photos / 1342asf1sag3520_42tdgklaat02tmsga.png

[centinel3]

Yes, the key is the path to the blob object. Glad you figured it out!

[markshust]

Has anyone done this with Google Cloud Storage?

[Roshdy]

@centinel3 can you please post a sample call from client?