Dart

Search for Files in Google Drive

See more Google Drive Examples

This example follows the same methodology for listing all files in Google Drive in pages, but applies a search filter. It shows how to apply a query parameter for filtering the file results. See the Google Drive Files list for more optional HTTP parameters. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // 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 scope.

  final gAuth = CkAuthGoogle();
  gAuth.accessToken = 'GOOGLE-DRIVE-ACCESS-TOKEN';

  final rest = CkRest();

  // Connect using TLS.
  final bAutoReconnect = true;
  rest.connect('www.googleapis.com', 443, true, bAutoReconnect);

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

  // Get 5 results per page for testing.  (The default page size is 100, with a max of 1000.
  rest.addQueryParam('pageSize', '5');

  // Our search filter is to list all files containing ".jpg" (i.e. all JPG image files)
  rest.addQueryParam('q', 'name contains \'.jpg\'');

  final json = CkJsonObject();
  var i = 0;
  var numFiles = 0;

  // Send the request for the 1st page.
  var jsonResponse = rest.fullRequestNoBody('GET', '/drive/v3/files');

  var pageNumber = 1;
  var pageToken = '';
  var bContinueLoop = rest.lastMethodSuccess && (rest.responseStatusCode == 200);

  while (bContinueLoop) {

    print('---- Page $pageNumber ----');

    // Iterate over each file in the response and show the name, id, and mimeType.
    json.load(jsonResponse);

    numFiles = json.sizeOfArray('files');
    i = 0;
    while (i < numFiles) {
      json.i = i;
      print('name: ${json.stringOf('files[i].name')}');
      print('id: ${json.stringOf('files[i].id')}');
      print('mimeType: ${json.stringOf('files[i].mimeType')}');
      print('-');
      i++;
    }

    // Get the next page of files.
    // If the "nextPageToken" is present in the JSON response, then use it in the "pageToken" parameter
    // for the next request.   If no "nextPageToken" was present, then this was the last page of files.
    pageToken = json.stringOf('nextPageToken');
    bContinueLoop = false;
    final bHasMorePages = json.lastMethodSuccess;
    if (bHasMorePages) {
      rest.clearAllQueryParams();
      rest.addQueryParam('pageSize', '5');
      rest.addQueryParam('pageToken', pageToken);
      rest.addQueryParam('q', 'name contains \'.jpg\'');

      jsonResponse = rest.fullRequestNoBody('GET', '/drive/v3/files');
      bContinueLoop = rest.lastMethodSuccess && (rest.responseStatusCode == 200);
      pageNumber++;
    }
  }

  if (!rest.lastMethodSuccess) {
    print(rest.lastErrorText);
    return;
  }

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