Chilkat Online Tools

ListChannelMessages delphiDll Example

Amazon Chime

var
rest: HCkRest;
success: Boolean;
authAws: HCkAuthAws;
sbResponseBody: HCkStringBuilder;
respStatusCode: Integer;
jResp: HCkJsonObject;
Content: PWideChar;
CreatedTimestamp: Integer;
LastEditedTimestamp: Integer;
LastUpdatedTimestamp: Integer;
MessageId: PWideChar;
Metadata: PWideChar;
Redacted: Integer;
Arn: PWideChar;
Name: PWideChar;
v_Type: PWideChar;
ChannelArn: PWideChar;
NextToken: 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,'chime');
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
CkRest_SetAuthAws(rest,authAws);

// URL: https://chime.us-west-2.amazonaws.com/
// Use the same region as specified above.
success := CkRest_Connect(rest,'chime.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;

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

sbResponseBody := CkStringBuilder_Create();
success := CkRest_FullRequestNoBodySb(rest,'GET','/channels/{channelArn}/messages',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

ChannelArn := CkJsonObject__stringOf(jResp,'ChannelArn');
NextToken := CkJsonObject__stringOf(jResp,'NextToken');
i := 0;
count_i := CkJsonObject_SizeOfArray(jResp,'ChannelMessages');
while i < count_i do
  begin
    CkJsonObject_putI(jResp,i);
    Content := CkJsonObject__stringOf(jResp,'ChannelMessages[i].Content');
    CreatedTimestamp := CkJsonObject_IntOf(jResp,'ChannelMessages[i].CreatedTimestamp');
    LastEditedTimestamp := CkJsonObject_IntOf(jResp,'ChannelMessages[i].LastEditedTimestamp');
    LastUpdatedTimestamp := CkJsonObject_IntOf(jResp,'ChannelMessages[i].LastUpdatedTimestamp');
    MessageId := CkJsonObject__stringOf(jResp,'ChannelMessages[i].MessageId');
    Metadata := CkJsonObject__stringOf(jResp,'ChannelMessages[i].Metadata');
    Redacted := CkJsonObject_IntOf(jResp,'ChannelMessages[i].Redacted');
    Arn := CkJsonObject__stringOf(jResp,'ChannelMessages[i].Sender.Arn');
    Name := CkJsonObject__stringOf(jResp,'ChannelMessages[i].Sender.Name');
    v_Type := CkJsonObject__stringOf(jResp,'ChannelMessages[i].Type');
    i := i + 1;
  end;

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

// {
//   "ChannelArn": "string",
//   "ChannelMessages": [
//     {
//       "Content": "string",
//       "CreatedTimestamp": number,
//       "LastEditedTimestamp": number,
//       "LastUpdatedTimestamp": number,
//       "MessageId": "string",
//       "Metadata": "string",
//       "Redacted": boolean,
//       "Sender": {
//         "Arn": "string",
//         "Name": "string"
//       },
//       "Type": "string"
//     }
//   ],
//   "NextToken": "string"
// }

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