Dart

Upload String to Dropbox

See more Dropbox Examples

Uploads a string to a file on Dropbox. This example can upload content up to 150MB, assuming a 150MB string fits in memory for your app. Larger files must be uploaded with an upload session (upload_session/start). Dart

import 'package:chilkat/chilkat.dart';

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

  // A Dropbox access token should have been previously obtained.
  // Dropbox access tokens do not expire.
  // See Dropbox Access Token.

  final rest = CkRest();

  // Connect to Dropbox
  try {
    rest.connect('content.dropboxapi.com', 443, true, true);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Add request headers.
  rest.addHeader('Content-Type', 'application/octet-stream');
  rest.addHeader('Authorization', 'Bearer DROPBOX_ACCESS_TOKEN');

  // The upload "parameters" contained in JSON passed in an HTTP request header.
  // This is the JSON to be added in this example:
  // { 
  //    "path": "/jack.txt",
  //    "mode": "add",
  //    "autorename": true,
  //    "mute": false
  // }

  // This will be the content of the file created in Dropbox.
  final content = 'All work and no play makes Jack a dull boy';

  final json = CkJsonObject();
  json.appendString('path', '/jack.txt');
  json.appendString('mode', 'add');
  json.appendBool('autorename', true);
  json.appendBool('mute', false);
  rest.addHeader('Dropbox-API-Arg', json.emit());

  // Do the upload.  The URL is https://content.dropboxapi.com/2/files/upload.
  // We already connected to content.dropboxapi.com using TLS (i.e. HTTPS),
  // so now we only need to specify the path "/2/files/upload".

  final String responseStr;
  try {
    responseStr = rest.fullRequestString('POST', '/2/files/upload', content);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // When successful, Dropbox responds with a 200 response code.
  if (rest.responseStatusCode != 200) {
    // Examine the request/response to see what happened.
    print('response status code = ${rest.responseStatusCode}');
    print('response status text = ${rest.responseStatusText}');
    print('response header: ${rest.responseHeader}');
    print('response body (if any): $responseStr');
    print('---');
    print('LastRequestStartLine: ${rest.lastRequestStartLine}');
    print('LastRequestHeader: ${rest.lastRequestHeader}');
    return;
  }

  print('LastRequestHeader: ${rest.lastRequestHeader}');

  // The response is JSON.
  final jsonResp = CkJsonObject();
  jsonResp.emitCompact = false;
  jsonResp.load(responseStr);

  // Show the JSON response.
  print(jsonResp.emit());

  // Returns JSON that looks like this:
  // { 
  //  "name": "jack.txt",
  //  "path_lower": "/jack.txt",
  //  "path_display": "/jack.txt",
  //  "id": "id:yqx4-tE_NKAAAAAAAAAAAQ",
  //  "client_modified": "2016-06-02T20:42:11Z",
  //  "server_modified": "2016-06-02T20:42:11Z",
  //  "rev": "8482db15f",
  //  "size": 42
  // }

  // Sample code to get data from the JSON response:
  final size = jsonResp.intOf('size');
  print('size = $size');

  final rev = jsonResp.stringOf('rev');
  print('rev = $rev');

  final clientModified = jsonResp.stringOf('client_modified');
  final ckdt = CkDateTime();
  ckdt.setFromTimestamp(clientModified);
  final bLocalTime = true;
  final dt = CkDtObj();
  ckdt.toDtObj(bLocalTime, dt);

  print('${dt.day}/${dt.month}/${dt.year} ${dt.hour}:${dt.minute}');
}