Chilkat Online Tools

DescribeStream delphiDll Example

Amazon Kinesis Video Streams

var
rest: HCkRest;
success: Boolean;
authAws: HCkAuthAws;
json: HCkJsonObject;
sbRequestBody: HCkStringBuilder;
sbResponseBody: HCkStringBuilder;
respStatusCode: Integer;
jResp: HCkJsonObject;
j: Integer;
count_j: Integer;
strVal: PWideChar;
AdjacentParentShardId: PWideChar;
EndingHashKey: PWideChar;
StartingHashKey: PWideChar;
ParentShardId: PWideChar;
EndingSequenceNumber: PWideChar;
StartingSequenceNumber: PWideChar;
ShardId: PWideChar;
EncryptionType: PWideChar;
HasMoreShards: Integer;
KeyId: PWideChar;
RetentionPeriodHours: Integer;
StreamARN: PWideChar;
StreamCreationTimestamp: Integer;
StreamMode: PWideChar;
StreamName: PWideChar;
StreamStatus: PWideChar;
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 := CkRest_Create();

authAws := CkAuthAws_Create();
CkAuthAws_putAccessKey(authAws,'AWS_ACCESS_KEY');
CkAuthAws_putSecretKey(authAws,'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.)
CkAuthAws_putRegion(authAws,'us-west-2');
CkAuthAws_putServiceName(authAws,'kinesisvideo');
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
CkRest_SetAuthAws(rest,authAws);

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

// The following code creates the JSON request body.
// The JSON created by this code is shown below.

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

json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'ExclusiveStartShardId','string');
CkJsonObject_UpdateInt(json,'Limit',123);
CkJsonObject_UpdateString(json,'StreamName','string');

// The JSON request body created by the above code:

// {
//   "ExclusiveStartShardId": "string",
//   "Limit": number,
//   "StreamName": "string"
// }

CkRest_AddHeader(rest,'Content-Type','application/x-amz-json-1.1');
CkRest_AddHeader(rest,'X-Amz-Target','DescribeStream');

sbRequestBody := CkStringBuilder_Create();
CkJsonObject_EmitSb(json,sbRequestBody);
sbResponseBody := CkStringBuilder_Create();
success := CkRest_FullRequestSb(rest,'POST','/describeStream',sbRequestBody,sbResponseBody);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;
respStatusCode := CkRest_getResponseStatusCode(rest);
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));
if (respStatusCode <> 200) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(CkRest__responseHeader(rest));
    Memo1.Lines.Add('Response Body:');
    Memo1.Lines.Add(CkStringBuilder__getAsString(sbResponseBody));
    Exit;
  end;

jResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jResp,sbResponseBody);

// 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

EncryptionType := CkJsonObject__stringOf(jResp,'StreamDescription.EncryptionType');
HasMoreShards := CkJsonObject_IntOf(jResp,'StreamDescription.HasMoreShards');
KeyId := CkJsonObject__stringOf(jResp,'StreamDescription.KeyId');
RetentionPeriodHours := CkJsonObject_IntOf(jResp,'StreamDescription.RetentionPeriodHours');
StreamARN := CkJsonObject__stringOf(jResp,'StreamDescription.StreamARN');
StreamCreationTimestamp := CkJsonObject_IntOf(jResp,'StreamDescription.StreamCreationTimestamp');
StreamMode := CkJsonObject__stringOf(jResp,'StreamDescription.StreamModeDetails.StreamMode');
StreamName := CkJsonObject__stringOf(jResp,'StreamDescription.StreamName');
StreamStatus := CkJsonObject__stringOf(jResp,'StreamDescription.StreamStatus');
i := 0;
count_i := CkJsonObject_SizeOfArray(jResp,'StreamDescription.EnhancedMonitoring');
while i < count_i do
  begin
    CkJsonObject_putI(jResp,i);
    j := 0;
    count_j := CkJsonObject_SizeOfArray(jResp,'StreamDescription.EnhancedMonitoring[i].ShardLevelMetrics');
    while j < count_j do
      begin
        CkJsonObject_putJ(jResp,j);
        strVal := CkJsonObject__stringOf(jResp,'StreamDescription.EnhancedMonitoring[i].ShardLevelMetrics[j]');
        j := j + 1;
      end;

    i := i + 1;
  end;

i := 0;
count_i := CkJsonObject_SizeOfArray(jResp,'StreamDescription.Shards');
while i < count_i do
  begin
    CkJsonObject_putI(jResp,i);
    AdjacentParentShardId := CkJsonObject__stringOf(jResp,'StreamDescription.Shards[i].AdjacentParentShardId');
    EndingHashKey := CkJsonObject__stringOf(jResp,'StreamDescription.Shards[i].HashKeyRange.EndingHashKey');
    StartingHashKey := CkJsonObject__stringOf(jResp,'StreamDescription.Shards[i].HashKeyRange.StartingHashKey');
    ParentShardId := CkJsonObject__stringOf(jResp,'StreamDescription.Shards[i].ParentShardId');
    EndingSequenceNumber := CkJsonObject__stringOf(jResp,'StreamDescription.Shards[i].SequenceNumberRange.EndingSequenceNumber');
    StartingSequenceNumber := CkJsonObject__stringOf(jResp,'StreamDescription.Shards[i].SequenceNumberRange.StartingSequenceNumber');
    ShardId := CkJsonObject__stringOf(jResp,'StreamDescription.Shards[i].ShardId');
    i := i + 1;
  end;

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

// {
//   "StreamDescription": {
//     "EncryptionType": "string",
//     "EnhancedMonitoring": [
//       {
//         "ShardLevelMetrics": [
//           "string"
//         ]
//       }
//     ],
//     "HasMoreShards": boolean,
//     "KeyId": "string",
//     "RetentionPeriodHours": number,
//     "Shards": [
//       {
//         "AdjacentParentShardId": "string",
//         "HashKeyRange": {
//           "EndingHashKey": "string",
//           "StartingHashKey": "string"
//         },
//         "ParentShardId": "string",
//         "SequenceNumberRange": {
//           "EndingSequenceNumber": "string",
//           "StartingSequenceNumber": "string"
//         },
//         "ShardId": "string"
//       }
//     ],
//     "StreamARN": "string",
//     "StreamCreationTimestamp": number,
//     "StreamModeDetails": {
//       "StreamMode": "string"
//     },
//     "StreamName": "string",
//     "StreamStatus": "string"
//   }
// }

CkRest_Dispose(rest);
CkAuthAws_Dispose(authAws);
CkJsonObject_Dispose(json);
CkStringBuilder_Dispose(sbRequestBody);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jResp);