Delphi DLL 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). Delphi DLL

var
success: Boolean;
gAuth: HCkAuthGoogle;
rest: HCkRest;
bAutoReconnect: Boolean;
jsonReqBody: HCkJsonObject;
objVersioning: HCkJsonObject;
jsonResponseStr: PWideChar;

begin
success := False;

//  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.

gAuth := CkAuthGoogle_Create();
//  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

rest := CkRest_Create();

//  Connect using TLS.
bAutoReconnect := True;
success := CkRest_Connect(rest,'www.googleapis.com',443,True,bAutoReconnect);

//  Provide the authentication credentials (i.e. the access key)
success := CkRest_SetAuthGoogle(rest,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..
jsonReqBody := CkJsonObject_Create();
CkJsonObject_AppendString(jsonReqBody,'name','chilkat-bucket-c');
CkJsonObject_AppendString(jsonReqBody,'kind','storage#bucket');
CkJsonObject_AppendString(jsonReqBody,'location','US');

objVersioning := CkJsonObject_Create();
CkJsonObject_AppendObject2(jsonReqBody,'versioning',objVersioning);
CkJsonObject_AppendBool(objVersioning,'enabled',True);

//  Show the HTTP request body we'll be sending.
Memo1.Lines.Add(CkJsonObject__emit(jsonReqBody));

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

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

jsonResponseStr := CkRest__fullRequestString(rest,'POST','/storage/v1/b',CkJsonObject__emit(jsonReqBody));
if (CkRest_getLastMethodSuccess(rest) = False) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

//  Show the JSON response.  (See below for a sample JSON response.)
Memo1.Lines.Add('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="
//  }
//

CkAuthGoogle_Dispose(gAuth);
CkRest_Dispose(rest);
CkJsonObject_Dispose(jsonReqBody);
CkJsonObject_Dispose(objVersioning);