Chilkat Online Tools

ListChannels delphiAx Example

AWS IoT Analytics

var
rest: TChilkatRest;
success: Integer;
authAws: TChilkatAuthAws;
sbResponseBody: TChilkatStringBuilder;
respStatusCode: Integer;
jResp: TChilkatJsonObject;
channelName: WideString;
Bucket: WideString;
KeyPrefix: WideString;
RoleArn: WideString;
creationTime: Integer;
lastMessageArrivalTime: Integer;
lastUpdateTime: Integer;
status: 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','ListChannels');

sbResponseBody := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestNoBodySb('GET','/channels',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('channelSummaries');
while i < count_i do
  begin
    jResp.I := i;
    channelName := jResp.StringOf('channelSummaries[i].channelName');
    Bucket := jResp.StringOf('channelSummaries[i].channelStorage.customerManagedS3.bucket');
    KeyPrefix := jResp.StringOf('channelSummaries[i].channelStorage.customerManagedS3.keyPrefix');
    RoleArn := jResp.StringOf('channelSummaries[i].channelStorage.customerManagedS3.roleArn');
    creationTime := jResp.IntOf('channelSummaries[i].creationTime');
    lastMessageArrivalTime := jResp.IntOf('channelSummaries[i].lastMessageArrivalTime');
    lastUpdateTime := jResp.IntOf('channelSummaries[i].lastUpdateTime');
    status := jResp.StringOf('channelSummaries[i].status');
    i := i + 1;
  end;

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

// {
//   "channelSummaries": [
//     {
//       "channelName": "string",
//       "channelStorage": {
//         "customerManagedS3": {
//           "bucket": "string",
//           "keyPrefix": "string",
//           "roleArn": "string"
//         },
//         "serviceManagedS3": {}
//       },
//       "creationTime": number,
//       "lastMessageArrivalTime": number,
//       "lastUpdateTime": number,
//       "status": "string"
//     }
//   ],
//   "nextToken": "string"
// }