React Native

S3 - Working with Buckets in a Region

See more Amazon S3 (new) Examples

Demonstrates how to work with S3 buckets located in a particular region. React Native

import { AuthAws, BinData, Rest, StringBuilder } from '@chilkat/react-native'

async function chilkatExample() {
  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  // When usig the REST class to access an S3 bucket that has been created in a particular region,
  // there are three important things to remember:
  // 
  // 1) Connect to the domain that includes the region.  For example, instead of connecting to
  //    "s3.amazonaws.com", connect to "s3.eu-central-1.amazonaws.com" if your bucket is in the EU Frankfurt region.
  //    See http://docs.aws.amazon.com/general/latest/gr/rande.html#s3_region   for a list of S3 region domains (endpoints)
  // 
  // 2) Set the AuthAws.Region property equal to the region, such as "eu-central-1".
  // 
  // 3) Include the region in request's Host header.
  // 

  // This example will upload to a bucket in the eu-central-1 region.
  // 
  const rest = new Rest();

  // Connect to the Amazon AWS REST server.
  const bTls = true;
  const port = 443;
  const bAutoReconnect = true;
  await rest.connectAsync('s3.eu-central-1.amazonaws.com', port, bTls, bAutoReconnect);

  // Provide AWS credentials for the REST call.
  const authAws = new AuthAws();
  authAws.accessKey = 'AWS_ACCESS_KEY';
  authAws.secretKey = 'AWS_SECRET_KEY';
  authAws.serviceName = 's3';
  authAws.region = 'eu-central-1';
  rest.setAuthAws(authAws);

  // Set the bucket name via the HOST header.
  // In this case, the bucket name is "chilkateufrankfurt" (which was created in the eu-central-1 region)
  rest.host = 'chilkateufrankfurt.s3.eu-central-1.amazonaws.com';

  const fileData = new BinData();
  fileData.loadFile('qa_data/jpg/starfish.jpg');

  // Upload the file to Amazon S3.
  const responseBody = new StringBuilder();
  try {
    await rest.fullRequestBdAsync('PUT', '/starfish.jpg', fileData, responseBody);
  } catch {
    console.log(rest.lastErrorText);
    return;
  }

  // Did we get a 200 response indicating success?
  const statusCode = rest.responseStatusCode;
  if (statusCode !== 200) {
    console.log(`Error response: ${responseBody.getAsString()}`);
    console.log(`Status code: ${statusCode}, Status text: ${rest.responseStatusText}`);
    return;
  }

  console.log('File successfully uploaded.');
}