Pascal (Lazarus/Delphi)

VoiceBase -- Retrieve JSON Transcript

See more VoiceBase Examples

Retrieves a JSON transcript for a media file. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Http,
  Chilkat.StringBuilder,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  accessToken: string;
  http: THttp;
  sbAuth: TStringBuilder;
  sbUrl: TStringBuilder;
  replaceCount: Integer;
  strJson: string;
  json: TJsonObject;
  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 := THttp.Create;

  //  Add the access (bearer) token to the request, which is a header
  //  having the following format:
  //  Authorization: Bearer <userAccessToken>
  sbAuth := TStringBuilder.Create;
  sbAuth.Append('Bearer ');
  sbAuth.Append(accessToken);
  http.SetRequestHeader('Authorization',sbAuth.GetAsString());

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

  strJson := http.QuickGetStr(sbUrl.GetAsString());
  if (http.LastMethodSuccess <> True) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  //  The response should be JSON, even if an error.
  json := TJsonObject.Create;
  json.Load(strJson);
  json.EmitCompact := False;

  WriteLn('Response status code = ' + http.LastStatus);

  if (http.LastStatus <> 200) then
    begin
      WriteLn(json.Emit());
      WriteLn('Failed');
      Exit;
    end;

  //  See the sample JSON response below..

  //  Iterate over the words..
  numWords := json.SizeOfArray('transcripts.latest.words');
  i := 0;
  while i < numWords do
    begin
      json.I := i;
      WriteLn(json.StringOf('transcripts.latest.words[i].w'));
      i := i + 1;
    end;

  WriteLn('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"
  //          },
  //  ...


  http.Free;
  sbAuth.Free;
  sbUrl.Free;
  json.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.