Chilkat Online Tools

DescribeChannel delphiAx Example

AWS IoT Analytics

var
rest: TChilkatRest;
success: Integer;
authAws: TChilkatAuthAws;
sbResponseBody: TChilkatStringBuilder;
respStatusCode: Integer;
jResp: TChilkatJsonObject;
Arn: WideString;
CreationTime: Integer;
LastMessageArrivalTime: Integer;
LastUpdateTime: Integer;
Name: WideString;
NumberOfDays: Integer;
Unlimited: Integer;
Status: WideString;
Bucket: WideString;
KeyPrefix: WideString;
RoleArn: WideString;
EstimatedOn: Integer;
EstimatedSizeInBytes: 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','DescribeChannel');

sbResponseBody := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestNoBodySb('GET','/channels/{channelName}',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

Arn := jResp.StringOf('channel.arn');
CreationTime := jResp.IntOf('channel.creationTime');
LastMessageArrivalTime := jResp.IntOf('channel.lastMessageArrivalTime');
LastUpdateTime := jResp.IntOf('channel.lastUpdateTime');
Name := jResp.StringOf('channel.name');
NumberOfDays := jResp.IntOf('channel.retentionPeriod.numberOfDays');
Unlimited := jResp.IntOf('channel.retentionPeriod.unlimited');
Status := jResp.StringOf('channel.status');
Bucket := jResp.StringOf('channel.storage.customerManagedS3.bucket');
KeyPrefix := jResp.StringOf('channel.storage.customerManagedS3.keyPrefix');
RoleArn := jResp.StringOf('channel.storage.customerManagedS3.roleArn');
EstimatedOn := jResp.IntOf('statistics.size.estimatedOn');
EstimatedSizeInBytes := jResp.IntOf('statistics.size.estimatedSizeInBytes');

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

// {
//   "channel": {
//     "arn": "string",
//     "creationTime": number,
//     "lastMessageArrivalTime": number,
//     "lastUpdateTime": number,
//     "name": "string",
//     "retentionPeriod": {
//       "numberOfDays": number,
//       "unlimited": boolean
//     },
//     "status": "string",
//     "storage": {
//       "customerManagedS3": {
//         "bucket": "string",
//         "keyPrefix": "string",
//         "roleArn": "string"
//       },
//       "serviceManagedS3": {}
//     }
//   },
//   "statistics": {
//     "size": {
//       "estimatedOn": number,
//       "estimatedSizeInBytes": number
//     }
//   }
// }