(Delphi DLL) VoiceBase -- Upload a media file for transcription and analysis

This example demonstrates how to upload a media file for transcription and analysis. It duplicates the following curl command:

curl https://apis.voicebase.com/v2-beta/media \
  --form media=@msg_123_abc.wav \
  --header "Authorization: Bearer ${TOKEN}"

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
accessToken: PWideChar;
http: HCkHttp;
req: HCkHttpRequest;
sbAuth: HCkStringBuilder;
success: Boolean;
resp: HCkHttpResponse;
json: HCkJsonObject;

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();

req := CkHttpRequest_Create();
CkHttpRequest_putHttpVerb(req,'POST');
CkHttpRequest_putPath(req,'/v2-beta/media');
CkHttpRequest_putContentType(req,'multipart/form-data');

// 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);
CkHttpRequest_AddHeader(req,'Authorization',CkStringBuilder__getAsString(sbAuth));

success := CkHttpRequest_AddFileForUpload2(req,'media','qa_data/wav/msg_123_abc.wav','audio/x-wav');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkHttpRequest__lastErrorText(req));
    Exit;
  end;

resp := CkHttp_SynchronousRequest(http,'apis.voicebase.com',443,True,req);
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// Examine the response status code and body.
Memo1.Lines.Add('Response status code = ' + IntToStr(CkHttpResponse_getStatusCode(resp)));

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

Memo1.Lines.Add(CkJsonObject__emit(json));

// A successful response will have a status code = 200
if (CkHttpResponse_getStatusCode(resp) <> 200) then
  begin
    Memo1.Lines.Add('Failed.');
  end
else
  begin
    Memo1.Lines.Add('mediaId: ' + CkJsonObject__stringOf(json,'mediaId'));
    Memo1.Lines.Add('href: ' + CkJsonObject__stringOf(json,'_links.self.href'));
    Memo1.Lines.Add('status: ' + CkJsonObject__stringOf(json,'status'));
    Memo1.Lines.Add('Success.');
  end;

CkHttpResponse_Dispose(resp);

// Here is an example of a successful response:

// 	{ 
// 	  "_links": { 
// 	    "self": { 
// 	      "href": "/v2-beta/media/856a1e85-c847-4c3c-b7a4-6cf15cd51db4"
// 	    }
// 	  },
// 	  "mediaId": "856a1e85-c847-4c3c-b7a4-6cf15cd51db4",
// 	  "status": "accepted",
// 	  "metadata": {}
// 	

CkHttp_Dispose(http);
CkHttpRequest_Dispose(req);
CkStringBuilder_Dispose(sbAuth);
CkJsonObject_Dispose(json);

end;