S3 Uploads

Sponsored by Differential

NOTES

This is an upgrade to the original atmosphere S3 project meant to work on React, React Native, and Blaze. THE API IS COMPLETELY DIFFERENT

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Star my code in github or atmosphere if you like my code or shoot me a dollar or two!

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Installation

For Node > 8 use version 2.x.x and for Node <= 8 use version 1.x.x

$ npm i --save s3up

How to use

Step 1

Instantiate your Authorizer. SERVER SIDE

import { authorizer as Authorizer } from 's3up/server';

const authorizer = new Authorizer({
	key: 'key',
	secret: 'secret',
	// All other defaults go here
	bucket:"bucket",
	region:"region",
});

Step 2

Set up your authorizers functions. Here is an example in Meteor. SERVER SIDE

Meteor.methods({
	authorize_upload: function(ops) {
		this.unblock();
		return authorizer.authorize_upload(ops);
	},
	authorize_delete: function(ops) {
		this.unblock();
		return authorizer.authorize_delete(ops);
	},
})

Step 3

Wire up your views with the upload and delete functions. Here is an example with Meteor Blaze's template events. CLIENT SIDE

import { upload_files, delete_files } from 's3up/client';

Template.example.events({
	'click .upload': function(event, instance) {
		upload_files(instance.$("input.file_bag")[0].files, {
			authorizer: Meteor.call.bind(this, "authorize_upload"),
			upload_event: function(err, res) {
				console.log({err, ...res});
				console.log(res.total_percent_uploaded);
			},
		});
	},
	'click .delete': function(event, instance) {
		delete_files({
			authorizer: Meteor.call.bind(this, "authorize_delete"),
			paths: ["someImage.jpg"],
			deleteComplete: function(err, res) {
				console.log({err, res});
			},
		})
	},
});

Notice how both upload_files and delete_files require an authorizer function to communicate with the server. In Meteor this is a Meteor.method but you can use anything.

Create your Amazon S3

For all of this to work you need to create an aws account.

1. Create an S3 bucket in your preferred region.

2. Access Key Id and Secret Key

1. Navigate to your bucket
2. On the top right side you'll see your account name. Click it and go to Security Credentials.
3. Create a new access key under the Access Keys (Access Key ID and Secret Access Key) tab.
4. Enter this information into your app as defined in "How to Use" "Step 1".
5. Your region can be found under "Properties" button and "Static Website Hosting" tab.
   • bucketName.s3-website-eu-west-1.amazonaws.com.
   • If your region is "us-east-1" or "us-standard" then you don't need to specify this in the config.

3. Hosting

1. Upload a blank index.html file (anywhere is ok, I put it in root).
2. Select the bucket's properties by clicking on the bucket (from All Buckets) then the "Properties" button at the top right.
3. Click "Static Website Hosting" tab.
4. Click Enable Website Hosting.
5. Fill the Index Document input with the path to your index.html without a trailing slash. E.g. afolder/index.html, index.html
6. Click "Save"

4. CORS

You need to set permissions so that everyone can see what's in there.

1. Select the bucket's properties and go to the "Permissions" tab.

2. Click "Edit CORS Configuration" and paste this:

   <?xml version="1.0" encoding="UTF-8"?>
   <CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
   	<CORSRule>
   		<AllowedOrigin>*</AllowedOrigin>
   		<AllowedMethod>PUT</AllowedMethod>
   		<AllowedMethod>POST</AllowedMethod>
   		<AllowedMethod>GET</AllowedMethod>
   		<AllowedMethod>HEAD</AllowedMethod>
   		<MaxAgeSeconds>3000</MaxAgeSeconds>
   		<AllowedHeader>*</AllowedHeader>
   	</CORSRule>
   </CORSConfiguration>

3. Click "Edit bucket policy" and paste this (Replace the bucket name with your own):

   {
   	"Version": "2008-10-17",
   	"Statement": [
   		{
   			"Sid": "AllowPublicRead",
   			"Effect": "Allow",
   			"Principal": {
   				"AWS": "*"
   			},
   			"Action": "s3:GetObject",
   			"Resource": "arn:aws:s3:::YOURBUCKETNAMEHERE/*"
   		}
   	]
   }

4. Click Save

Note

It might take a couple of hours before you can actually start uploading to S3. Amazon takes some time to make things work.

Enjoy, this took me a long time to figure out and I'm sharing it so that nobody has to go through all that.

API

[TODO]

Developer Notes

http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/frames.html https://github.com/Differential/meteor-uploader/blob/master/lib/UploaderFile.coffee#L169-L178

http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-auth-using-authorization-header.html http://docs.aws.amazon.com/general/latest/gr/sigv4-signed-request-examples.html https://github.com/CulturalMe/meteor-slingshot/blob/master/services/aws-s3.js