Delphi DLL

OpenAI (ChatGPT) Create Image

See more OpenAI ChatGPT Examples

Show how to send a POST to create an image. Gets the JSON response with URLs and then downloads images to files. 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, HttpResponse, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
json: HCkJsonObject;
resp: HCkHttpResponse;
sbResponseBody: HCkStringBuilder;
jResp: HCkJsonObject;
respStatusCode: Integer;
url: PWideChar;
sbLocalFilePath: HCkStringBuilder;
created: Integer;
i: Integer;
count_i: Integer;

begin
success := False;

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

http := CkHttp_Create();

// Implements the following CURL command:

// curl https://api.openai.com/v1/images/generations \
//   -H "Content-Type: application/json" \
//   -H "Authorization: Bearer $OPENAI_API_KEY" \
//   -d '{
//     "prompt": "A cute baby sea otter",
//     "n": 2,
//     "size": "1024x1024"
//   }'

// Use the following online tool to generate HTTP code from a CURL command
// Convert a cURL Command to HTTP Source Code

// Use this online tool to generate code from sample JSON:
// Generate Code to Create JSON

// The following JSON is sent in the request body.

// {
//   "prompt": "A cute baby sea otter",
//   "n": 2,
//   "size": "1024x1024"
// }

json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'prompt','A cute baby sea otter');
CkJsonObject_UpdateInt(json,'n',2);
CkJsonObject_UpdateString(json,'size','1024x1024');

// Adds the "Authorization: Bearer $OPENAI_API_KEY" header.
// This is NOT a real key.  Change the "sk-vi...." to your own key.
CkHttp_putAuthToken(http,'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');

resp := CkHttpResponse_Create();
success := CkHttp_HttpJson(http,'POST','https://api.openai.com/v1/images/generations',json,'application/json',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

sbResponseBody := CkStringBuilder_Create();
CkHttpResponse_GetBodySb(resp,sbResponseBody);

jResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jResp,sbResponseBody);
CkJsonObject_putEmitCompact(jResp,False);

Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(CkJsonObject__emit(jResp));

respStatusCode := CkHttpResponse_getStatusCode(resp);
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(CkHttpResponse__header(resp));
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)

// {
//   "created": 1589478378,
//   "data": [
//     {
//       "url": "https://..."
//     },
//     {
//       "url": "https://..."
//     }
//   ]
// }

// Sample code for parsing the JSON response...
// Use the following online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON

sbLocalFilePath := CkStringBuilder_Create();

// Download each image..
CkHttp_ClearHeaders(http);
CkHttp_putAuthToken(http,'');

created := CkJsonObject_IntOf(jResp,'created');
i := 0;
count_i := CkJsonObject_SizeOfArray(jResp,'data');
while i < count_i do
  begin
    CkJsonObject_putI(jResp,i);
    url := CkJsonObject__stringOf(jResp,'data[i].url');

    CkStringBuilder_SetString(sbLocalFilePath,'c:/aaworkarea/image_');
    CkStringBuilder_AppendInt(sbLocalFilePath,i + 1);
    CkStringBuilder_Append(sbLocalFilePath,'.png');

    success := CkHttp_Download(http,url,CkStringBuilder__getAsString(sbLocalFilePath));
    if (success = False) then
      begin
        Memo1.Lines.Add(CkHttp__lastErrorText(http));
        Exit;
      end;

    i := i + 1;
  end;

CkHttp_Dispose(http);
CkJsonObject_Dispose(json);
CkHttpResponse_Dispose(resp);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jResp);
CkStringBuilder_Dispose(sbLocalFilePath);

end;