(Delphi ActiveX) VoiceBase -- Upload a Media File with a JSON Configuration

This example uploads a media file and also provides a configuration file.

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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
accessToken: WideString;
http: TChilkatHttp;
req: TChilkatHttpRequest;
sbAuth: TChilkatStringBuilder;
success: Integer;
json: TChilkatJsonObject;
jConfig: IChilkatJsonObject;
jKeywords: IChilkatJsonObject;
jGroups: IChilkatJsonArray;
resp: IChilkatHttpResponse;

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 := TChilkatHttp.Create(Self);

req := TChilkatHttpRequest.Create(Self);
req.HttpVerb := 'POST';
req.Path := '/v2-beta/media';
req.ContentType := 'multipart/form-data';

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

success := req.AddFileForUpload2('media','qa_data/wav/msg_123_abc.wav','audio/x-wav');
if (success <> 1) then
  begin
    Memo1.Lines.Add(req.LastErrorText);
    Exit;
  end;

// This is the JSON of the configuration to be added as a parameter to the upload:
// (Obviously, if you want a callback, you would use a URL that goes to your own web server..)

// 	{ 
// 	   "configuration":{ 
// 	      "publish":{ 
// 	         "callbacks":[
// 	            { 
// 	               "url":"https://www.chilkatsoft.com/dss/update_vm_transcription.asp",
// 	               "method":"POST",
// 	               "include":[
// 	                  "transcripts",
// 	                  "keywords",
// 	                  "topics",
// 	                  "metadata"
// 	               ]
// 	            }
// 	         ]
// 	      },
// 	      "keywords":{ 
// 	         "groups":[]
// 	      }
// 	   }
// 	}

// This code produces the above JSON.
json := TChilkatJsonObject.Create(Self);
json.UpdateString('configuration.publish.callbacks[0].url','https://www.chilkatsoft.com/dss/update_vm_transcription.asp');
json.UpdateString('configuration.publish.callbacks[0].method','POST');
json.UpdateString('configuration.publish.callbacks[0].include[0]','transcripts');
json.UpdateString('configuration.publish.callbacks[0].include[1]','keywords');
json.UpdateString('configuration.publish.callbacks[0].include[2]','topics');
json.UpdateString('configuration.publish.callbacks[0].include[3]','metadata');
jConfig := json.ObjectOf('configuration');
jKeywords := jConfig.AppendObject('keywords');
jGroups := jKeywords.AppendArray('groups');

// Add the configuration JSON to the upload.
req.AddParam('configuration',json.Emit());

// Do the upload..
resp := http.SynchronousRequest('apis.voicebase.com',443,1,req.ControlInterface);
if (http.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

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

// The response should be JSON, even if an error.
json.Load(resp.BodyStr);
json.EmitCompact := 0;

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

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

// 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": {}
// 	
end;