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Delphi DLL Web API Examples

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(Delphi DLL) VoiceBase -- Compound Expression Search

Demonstrates how to do a VoiceBase compound expression search. See VoiceBase Search for more details about Search.

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, CkDateTime, DtObj, HttpResponse, StringBuilder, JsonObject, HttpRequest;

...

procedure TForm1.Button1Click(Sender: TObject);
var
accessToken: PWideChar;
http: HCkHttp;
req: HCkHttpRequest;
sbAuth: HCkStringBuilder;
resp: HCkHttpResponse;
json: HCkJsonObject;
dt: HCkDateTime;
mediaCount: Integer;
i: Integer;
dateCreated: PWideChar;
localTime: Boolean;
dtObj: HCkDtObj;

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

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

http := CkHttp_Create();

req := CkHttpRequest_Create();
CkHttpRequest_putHttpVerb(req,'GET');
CkHttpRequest_putPath(req,'/v2-beta/media');

// 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));

// Search for media containing the terms any of the terms "test", "number", or "three"
CkHttpRequest_AddParam(req,'query','"test" OR "number" OR "three"');

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);

// 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);

// See the sample JSON response below..

// Iterate over the JSON like this:
dt := CkDateTime_Create();
mediaCount := CkJsonObject_SizeOfArray(json,'media');
i := 0;
while i < mediaCount do
  begin
    CkJsonObject_putI(json,i);

    Memo1.Lines.Add('-- ' + IntToStr(i) + ' --');
    Memo1.Lines.Add('  mediaId: ' + CkJsonObject__stringOf(json,'media[i].mediaId'));
    Memo1.Lines.Add('  status: ' + CkJsonObject__stringOf(json,'media[i].status'));
    Memo1.Lines.Add('  contentType: ' + CkJsonObject__stringOf(json,'media[i].metadata.contentType'));
    Memo1.Lines.Add('  milliseconds: ' + CkJsonObject__stringOf(json,'media[i].metadata.length.milliseconds'));
    Memo1.Lines.Add('  descriptive: ' + CkJsonObject__stringOf(json,'media[i].metadata.length.descriptive'));
    dateCreated := CkJsonObject__stringOf(json,'media[i].dateCreated');
    CkDateTime_SetFromTimestamp(dt,dateCreated);

    localTime := True;
    dtObj := CkDateTime_GetDtObj(dt,localTime);
    Memo1.Lines.Add('  ' + IntToStr(CkDtObj_getMonth(dtObj)) + '/' + IntToStr(CkDtObj_getDay(dtObj)) + '  ' + IntToStr(CkDtObj_getHour(dtObj))
         + ':' + IntToStr(CkDtObj_getMinute(dtObj)));
    CkDtObj_Dispose(dtObj);

    i := i + 1;
  end;

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

// A sample JSON response:

// { 
//   "_links": { 
//     "self": { 
//       "href": "/v2-beta/media"
//     }
//   },
//   "media": [
//     { 
//       "mediaId": "26063536-FFFF-4020-93ba-0878112d834b",
//       "status": "finished",
//       "metadata": { 
//         "contentType": "audio/x-wav",
//         "length": { 
//           "milliseconds": 85141,
//           "descriptive": "85.0 sec"
//         }
//       },
//       "dateCreated": "2017-01-19T16:49:32.000Z"
//     },
//     { 
//       "mediaId": "8163fbbc-FFFF-4794-aa95-045420bb321d",
//       "status": "finished",
//       "metadata": { 
//         "contentType": "audio/x-wav",
//         "length": { 
//           "milliseconds": 65342,
//           "descriptive": "65.0 sec"
//         }
//       },
//       "dateCreated": "2017-01-19T20:08:49.000Z"
//     },
// ...
// ...
//     { 
//       "mediaId": "b01e27be-FFFF-4b62-8802-6dc66a75c4d3",
//       "status": "finished",
//       "metadata": { 
//         "contentType": "audio/x-wav",
//         "length": { 
//           "milliseconds": 11581,
//           "descriptive": "11.0 sec"
//         }
//       },
//       "dateCreated": "2017-02-06T20:55:43.000Z"
//     }
//   ]
// }

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

end;

 

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