Delphi DLL

VoiceBase -- Retrieve JSON Transcript

See more VoiceBase Examples

Retrieves a JSON transcript for a media file. Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, StringBuilder, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
accessToken: PWideChar;
http: HCkHttp;
sbAuth: HCkStringBuilder;
sbUrl: HCkStringBuilder;
replaceCount: Integer;
strJson: PWideChar;
json: HCkJsonObject;
numWords: Integer;
i: Integer;

begin
// This example assumes the Chilkat HTTP API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Insert your Bearer token here:
accessToken := 'VOICEBASE_TOKEN';

http := CkHttp_Create();

// Add the access (bearer) token to the request, which is a header
// having the following format:
// Authorization: Bearer <userAccessToken>
sbAuth := CkStringBuilder_Create();
CkStringBuilder_Append(sbAuth,'Bearer ');
CkStringBuilder_Append(sbAuth,accessToken);
CkHttp_SetRequestHeader(http,'Authorization',CkStringBuilder__getAsString(sbAuth));

sbUrl := CkStringBuilder_Create();
CkStringBuilder_Append(sbUrl,'https://apis.voicebase.com/v2-beta/media/$MEDIA_ID/transcripts/latest');
replaceCount := CkStringBuilder_Replace(sbUrl,'$MEDIA_ID','f9b9bb88-d52c-4960-bcef-d516a9f85594');

strJson := CkHttp__quickGetStr(http,CkStringBuilder__getAsString(sbUrl));
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// The response should be JSON, even if an error.
json := CkJsonObject_Create();
CkJsonObject_Load(json,strJson);
CkJsonObject_putEmitCompact(json,False);

Memo1.Lines.Add('Response status code = ' + IntToStr(CkHttp_getLastStatus(http)));

if (CkHttp_getLastStatus(http) <> 200) then
  begin
    Memo1.Lines.Add(CkJsonObject__emit(json));
    Memo1.Lines.Add('Failed');
    Exit;
  end;

// See the sample JSON response below..

// Iterate over the words..
numWords := CkJsonObject_SizeOfArray(json,'transcripts.latest.words');
i := 0;
while i < numWords do
  begin
    CkJsonObject_putI(json,i);
    Memo1.Lines.Add(CkJsonObject__stringOf(json,'transcripts.latest.words[i].w'));
    i := i + 1;
  end;

Memo1.Lines.Add('Success.');

// A sample JSON response:

// { 
//   "_links": { 
//     "self": { 
//       "href": "/v2-beta/media/f9b9bb88-d52c-4960-bcef-d516a9f85594/transcripts/latest"
//     }
//   },
//   "transcripts": { 
//     "latest": { 
//       "revision": "b25e81dc-ae3e-4f9d-8008-1d56a283c17f",
//       "engine": "standard",
//       "confidence": 2.196210728898151,
//       "words": [
//         { 
//           "p": 0,
//           "s": 830,
//           "c": 0.14,
//           "e": 870,
//           "w": "You"
//         },
//         { 
//           "p": 1,
//           "s": 1860,
//           "c": 0.432,
//           "e": 1920,
//           "w": "know"
//         },
//         { 
//           "p": 2,
//           "s": 1930,
//           "c": 0.288,
//           "e": 2250,
//           "w": "that's"
//         },
//         { 
//           "p": 3,
//           "s": 2250,
//           "c": 0.923,
//           "e": 2300,
//           "w": "a"
//         },
// ...

CkHttp_Dispose(http);
CkStringBuilder_Dispose(sbAuth);
CkStringBuilder_Dispose(sbUrl);
CkJsonObject_Dispose(json);

end;