React Native AWS3

React Native AWS3 is a module for uploading files to S3. Unlike other libraries out there, there are no native dependencies.

npm install --save react-native-aws3

Note on S3 user permissions

The user associated with the accessKey and secretKey you use must have the appropriate permissions assigned to them. My user's IAM policy looks like:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "Stmt1458840156000",
            "Effect": "Allow",
            "Action": [
                "s3:GetObject",
                "s3:GetObjectAcl",
                "s3:GetObjectVersion",
                "s3:PutObject",
                "s3:PutObjectAcl",
                "s3:PutObjectVersionAcl"
            ],
            "Resource": [
                "arn:aws:s3:::my-bucket/uploads/*"
            ]
        }
    ]
}

Example

import { RNS3 } from 'react-native-aws3';

const file = {
  // `uri` can also be a file system path (i.e. file://)
  uri: "assets-library://asset/asset.PNG?id=655DBE66-8008-459C-9358-914E1FB532DD&ext=PNG",
  name: "image.png",
  type: "image/png"
}

const options = {
  keyPrefix: "uploads/",
  bucket: "your-bucket",
  region: "us-east-1",
  accessKey: "your-access-key",
  secretKey: "your-secret-key",
  successActionStatus: 201,
  metadata: {
    latitude: '123.506239',  // Becomes x-amz-meta-latitude onec in S3
    longitude: '-23.045293',
    photographer: 'John Doe'
  }
}

RNS3.put(file, options).then(response => {
  if (response.status !== 201)
    throw new Error("Failed to upload image to S3");
  console.log(response.body);
  /**
   * {
   *   postResponse: {
   *     bucket: "your-bucket",
   *     etag : "9f620878e06d28774406017480a59fd4",
   *     key: "uploads/image.png",
   *     location: "https://your-bucket.s3.amazonaws.com/uploads%2Fimage.png"
   *   }
   * }
   */
});

Usage

put(file, options)

Upload a file to S3.

Arguments:

1. file

• uri required - File system URI, can be assets library path or file:// path
• name required - The name of the file, will be stored as such in S3
• type required - The mime type, also used for Content-Type parameter in the S3 post policy

2. options

• acl - The Access Control List of this object. Defaults to public-read
• keyPrefix - Prefix, or path to the file on S3, i.e. uploads/ (note the trailing slash)
• bucket required - Your S3 bucket
• region required - The region of your S3 bucket
• accessKey required - Your S3 AWSAccessKeyId
• secretKey required - Your S3 AWSSecretKey
• metadata - Custom metadata to attach to your object
• successActionStatus - HTTP response status if successful, defaults to 201
• awsUrl - AWS S3 url. Defaults to s3.amazonaws.com
• timeDelta - Devices time offset from world clock in milliseconds, defaults to 0
• sessionToken - When working w/ Cognito (info below)
• successActionStatus - HTTP response status if successful, defaults to 201.

Returns an object that wraps an XMLHttpRequest instance and behaves like a promise, with the following additional methods:

• progress - accepts a callback which will be called with an event representing the progress of the upload. Event object is of shape
  • loaded - amount uploaded
  • total - total amount to upload
  • percent - number between 0 and 1 representing the percent completed
• abort - aborts the xhr instance

Examples:

RNS3.put(file, options)
  .progress((e) => console.log(e.loaded / e.total)); // or console.log(e.percent)

RNS3.put(file, option)
  .abort();

Cognito

Cognito is a service that enables you to create unique identities for your users. If you are using Cognito, you'll need to pass in the session token you received from AWS Security Token Service as the sessionToken key in the options hash. See the Cognito and temporary security credentials documentation for more information.

TODO

• [ ] Support DeleteObject and (authenticated) GetObject operations.

License

MIT