react-s3-post-uploader

React component for S3 uploads via POST (only) (sigv4-post-example).

Install

$ npm install --save @utrustdev/react-s3-post-uploader

Code Example (simplified)

Working full example (eg. with rendering errors) is here

import S3PostUploader from '@utrustdev/react-s3-post-uploader';


class Uploads extends Component {
  setInputRef = input => {
    this.uploadInput = input;
  };

  onClick = event => {
    event.preventDefault();
    this.uploadInput.click();
  };

  onUploadStart = () => {...}
  onUploadProgress = (progressEvent) => {...}
  onUploadFinish = (uploadResult, file) => {...}
  onUploadError = error => {...}

  getCredentials = (file, callback) => {
    fetch('url-returning-credentials-for-post-upload')
      .then(response => {
        return response.json();
      })
      .then(({url, fields}) => {
        callback(file, {
          uploadUrl: url,
          params: {
            acl: fields.acl,
            key: fields.key,
            policy: fields.Policy,
            success_action_status: fields.success_action_status,
            'content-type': fields['Content-Type'],
            'x-amz-signature': fields['X-Amz-Signature'],
            'x-amz-algorithm': fields['X-Amz-Algorithm'],
            'x-amz-date': fields['X-Amz-Date'],
            'x-amz-credential': fields['X-Amz-Credential'],
          },
        });
      })
  }

  render() {
    <S3PostUploader
      onStart={this.onUploadStart}
      onProgress={this.onUploadProgress}
      onFinish={this.onUploadFinish}
      onError={this.onUploadError}
      getCredentials={this.getCredentials}
      inputRef={this.setInputRef}
    />
    <div>
      <Button onClick={this.onClick} variant="outlined" component="span">
        Upload Attachments
      </Button>
    </div>
    }
}

S3PostUploader Props

• onStart - method called when uploading is started. Can be used to set some uploading state.
• onProgress - allows handling of progress events for uploads. The eventProgress struct is passing to function {loaded: number, total: number, lengthComputable: boolean, ...}. See usability for displaying uploaded percentage here
• onFinish - function getting (s3Result, file) where s3Result is result from S3 and file is chosen file. You can find relevant types here (type S3Result ...)
• onError - function getting (error). Error returning from S3 if something went wrong with upload. Relevant type in here (type Error ...)
• getCredentials - function getting (file, callback). File is chosen file. The callback is function responsible for uploading file on S3 via POST with required credentials we were fetched from server.
• inputRef - function getting reference to original file field. Used for save reference in component and call actions later on it (as shown in simple example above).

Working Example

In example folder you can find working example with server. In readme of example are instructions for running.

TODO

• make Upload example component with flow as S3PostUploader is
• add linter tests on CI with indicator in README
• make better copy for Contribution section

Contribution

Please create an issue or open a pull request. Once you change something in src/S3PostUploader.jsx please don't forget to run yarn build which will compile and also update S3PostUploader componnent in example. After this make sure example app is still working.

Alternatives

• https://github.com/odysseyscience/react-s3-uploader support only PUT upload with pressigned URL (PresignedUrlUploadObject)