Dart Requires Chilkat v11.0.0+

Send JSON REST Request, Get JSON Response

See more REST Examples

Demonstrates sending a RESTful JSON request, and receiving a JSON response. This example will create a bucket in Google Cloud Storage (which involves sending and receiving JSON). Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example will create a bucket in Google Cloud Storage.

  // It requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final gAuth = CkAuthGoogle();
  // Obtain an access token as shown in one of the following examples:
  // See Get Access Token using a Service Account JSON Key
  // See Get Access Token using a P12 File

  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 key)
  rest.setAuthGoogle(gAuth);

  // Build the JSON request body for creating a bucket.
  // The only required property is the "name", but we'll add more
  // to make a better example..
  final jsonReqBody = CkJsonObject();
  jsonReqBody.appendString('name', 'chilkat-bucket-c');
  jsonReqBody.appendString('kind', 'storage#bucket');
  jsonReqBody.appendString('location', 'US');

  final objVersioning = CkJsonObject();
  jsonReqBody.appendObject2('versioning', objVersioning);
  objVersioning.appendBool('enabled', true);

  // Show the HTTP request body we'll be sending.
  print(jsonReqBody.emit());

  // Add the required query parameter.
  // See https://cloud.google.com/storage/docs/json_api/v1/buckets/insert
  rest.addQueryParam('project', 'chilkattest-1050');

  // Add the Content-Type HTTP request header.
  rest.addHeader('Content-Type', 'application/json; charset=UTF-8');

  final String jsonResponseStr;
  try {
    jsonResponseStr = rest.fullRequestString('POST', '/storage/v1/b', jsonReqBody.emit());
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Show the JSON response.  (See below for a sample JSON response.)
  print('Json Response: $jsonResponseStr');

  // {
  //  "kind": "storage#bucket",
  //  "id": "chilkat-bucket-c",
  //  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-bucket-c",
  //  "projectNumber": "999992999999",
  //  "name": "chilkat-bucket-c",
  //  "timeCreated": "2016-04-29T21:08:10.451Z",
  //  "updated": "2016-04-29T21:08:10.451Z",
  //  "metageneration": "1",
  //  "owner": {
  //   "entity": "project-owners-999992999999"
  //  },
  //  "location": "US",
  //  "versioning": {
  //   "enabled": true
  //  },
  //  "storageClass": "STANDARD",
  //  "etag": "CAE="
  // }
  // 
}