React Native

Upload Application Specific Data

See more Google Drive Examples

Uploads a text file (application specific data) where the contents of the file are contained in a string variable. React Native

import { AuthGoogle, JsonObject, Rest } from '@chilkat/react-native'

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

  // This example uses a previously obtained access token having permission for the 
  // Google Drive application specific data scope.
  const jsonToken = new JsonObject();
  jsonToken.loadFile('qa_data/tokens/googleDriveAppData.json');

  const gAuth = new AuthGoogle();
  gAuth.accessToken = jsonToken.stringOf('access_token');

  const rest = new Rest();

  // Connect using TLS.
  const bAutoReconnect = true;
  await rest.connectAsync('www.googleapis.com', 443, true, bAutoReconnect);

  // Provide the authentication credentials (i.e. the access token)
  rest.setAuthGoogle(gAuth);

  // A multipart upload to Google Drive needs a multipart/related Content-Type
  rest.addHeader('Content-Type', 'multipart/related');

  // Specify each part of the request.

  // The 1st part is JSON with information about the file.
  rest.partSelector = '1';
  rest.addHeader('Content-Type', 'application/json; charset=UTF-8');

  const json = new JsonObject();
  json.emitCompact = false;

  json.updateString('name', 'helloWorld.txt');
  json.updateString('description', 'A simple text file that says Hello World.');
  json.updateString('mimeType', 'text/plain');
  // Specifiy the application-specific data folder.
  json.updateString('parents[0]', 'appDataFolder');
  rest.setMultipartBodyString(json.emit());

  console.log(json.emit());

  // The JSON looks like this:
  // {
  //   "name": "helloWorld.txt",
  //   "description": "A simple text file that says Hello World.",
  //   "mimeType": "text/plain",
  //   "parents": [
  //     "appDataFolder"
  //   ]
  // }

  // The 2nd part is the file content.
  // In this case, we'll upload a simple text file containing "Hello World!"
  rest.partSelector = '2';
  rest.addHeader('Content-Type', 'text/plain');

  const fileContents = 'Hello World!';
  rest.setMultipartBodyString(fileContents);

  let jsonResponse: string;
  try {
    jsonResponse = await rest.fullRequestMultipartAsync('POST', '/upload/drive/v3/files?uploadType=multipart');
  } catch {
    console.log(rest.lastErrorText);
    return;
  }

  // A successful response will have a status code equal to 200.
  if (rest.responseStatusCode !== 200) {
    console.log(`response status code = ${rest.responseStatusCode}`);
    console.log(`response status text = ${rest.responseStatusText}`);
    console.log(`response header: ${rest.responseHeader}`);
    console.log(`response JSON: ${jsonResponse}`);
    return;
  }

  // Show the JSON response.
  json.load(jsonResponse);

  // Show the full JSON response.
  json.emitCompact = false;
  console.log(json.emit());

  // A successful response looks like this:
  // {
  //   "kind": "drive#file",
  //   "id": "0B53Q6OSTWYoldmJ0Z3ZqT2x5MFk",
  //   "name": "Untitled",
  //   "mimeType": "text/plain"
  // }

  // Get the fileId:
  console.log(`fileId: ${json.stringOf('id')}`);
}