Chilkat Online Tools

ListDatasets delphiAx Example

AWS IoT Analytics

var
rest: TChilkatRest;
success: Integer;
authAws: TChilkatAuthAws;
sbResponseBody: TChilkatStringBuilder;
respStatusCode: Integer;
jResp: TChilkatJsonObject;
creationTime: Integer;
datasetName: WideString;
lastUpdateTime: Integer;
status: WideString;
j: Integer;
count_j: Integer;
actionName: WideString;
actionType: WideString;
Name: WideString;
Expression: WideString;
nextToken: WideString;
i: Integer;
count_i: Integer;

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

rest := TChilkatRest.Create(Self);

authAws := TChilkatAuthAws.Create(Self);
authAws.AccessKey := 'AWS_ACCESS_KEY';
authAws.SecretKey := 'AWS_SECRET_KEY';

// Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
authAws.Region := 'us-west-2';
authAws.ServiceName := 'iotanalytics';
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
rest.SetAuthAws(authAws.ControlInterface);

// URL: https://iotanalytics.us-west-2.amazonaws.com/
// Use the same region as specified above.
success := rest.Connect('iotanalytics.us-west-2.amazonaws.com',443,1,1);
if (success <> 1) then
  begin
    Memo1.Lines.Add('ConnectFailReason: ' + IntToStr(rest.ConnectFailReason));
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

rest.AddHeader('Content-Type','application/x-amz-json-1.1');
rest.AddHeader('X-Amz-Target','ListDatasets');

sbResponseBody := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestNoBodySb('GET','/datasets',sbResponseBody.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;
respStatusCode := rest.ResponseStatusCode;
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));
if (respStatusCode <> 200) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(rest.ResponseHeader);
    Memo1.Lines.Add('Response Body:');
    Memo1.Lines.Add(sbResponseBody.GetAsString());
    Exit;
  end;

jResp := TChilkatJsonObject.Create(Self);
jResp.LoadSb(sbResponseBody.ControlInterface);

// The following code parses the JSON response.
// A sample JSON response is shown below the sample code.

// Use this online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON

nextToken := jResp.StringOf('nextToken');
i := 0;
count_i := jResp.SizeOfArray('datasetSummaries');
while i < count_i do
  begin
    jResp.I := i;
    creationTime := jResp.IntOf('datasetSummaries[i].creationTime');
    datasetName := jResp.StringOf('datasetSummaries[i].datasetName');
    lastUpdateTime := jResp.IntOf('datasetSummaries[i].lastUpdateTime');
    status := jResp.StringOf('datasetSummaries[i].status');
    j := 0;
    count_j := jResp.SizeOfArray('datasetSummaries[i].actions');
    while j < count_j do
      begin
        jResp.J := j;
        actionName := jResp.StringOf('datasetSummaries[i].actions[j].actionName');
        actionType := jResp.StringOf('datasetSummaries[i].actions[j].actionType');
        j := j + 1;
      end;

    j := 0;
    count_j := jResp.SizeOfArray('datasetSummaries[i].triggers');
    while j < count_j do
      begin
        jResp.J := j;
        Name := jResp.StringOf('datasetSummaries[i].triggers[j].dataset.name');
        Expression := jResp.StringOf('datasetSummaries[i].triggers[j].schedule.expression');
        j := j + 1;
      end;

    i := i + 1;
  end;

// A sample JSON response body parsed by the above code:

// {
//   "datasetSummaries": [
//     {
//       "actions": [
//         {
//           "actionName": "string",
//           "actionType": "string"
//         }
//       ],
//       "creationTime": number,
//       "datasetName": "string",
//       "lastUpdateTime": number,
//       "status": "string",
//       "triggers": [
//         {
//           "dataset": {
//             "name": "string"
//           },
//           "schedule": {
//             "expression": "string"
//           }
//         }
//       ]
//     }
//   ],
//   "nextToken": "string"
// }