DescribeChannel delphiAx Example
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
// }
// }
// }