上传参考图片

POST /api/public/uploads
Authorization: Bearer $CUTAI_API_KEY
Content-Type: multipart/form-data

curl -X POST "$CUTAI_BASE_URL/api/public/uploads" \
  -H "Authorization: Bearer $CUTAI_API_KEY" \
  -F "file=@/path/to/reference.png;type=image/png" \
  -F "width=1024" \
  -F "height=1024"

{
  "asset": {
    "id": "ast_xxx",
    "uploadKey": "users/usr_xxx/uploads/abc.png",
    "publicUrl": "https://cdn.example.com/users/usr_xxx/uploads/abc.png",
    "mimeType": "image/png",
    "width": 1024,
    "height": 1024,
    "metadata": {}
  }
}

curl -X POST "$CUTAI_BASE_URL/api/generations" \
  -H "Authorization: Bearer $CUTAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "generationType": "image-to-image",
    "modelId": "gpt-img2",
    "prompt": "Keep the same product, create a premium studio ad poster",
    "aspectRatio": "9:16",
    "resolution": "2K",
    "imageCount": 1,
    "inputAssetIds": ["ast_xxx"],
    "idempotencyKey": "order_10001_i2i"
  }'

import { readFile } from 'node:fs/promises';
import { basename } from 'node:path';
import { fileTypeFromBuffer } from 'file-type';

const baseUrl = process.env.CUTAI_BASE_URL;
const apiKey = process.env.CUTAI_API_KEY;
const filePath = '/path/to/reference.png';
const bytes = await readFile(filePath);
const detected = await fileTypeFromBuffer(bytes);
const contentType = detected?.mime ?? 'image/png';

const form = new FormData();
form.set('file', new File([bytes], basename(filePath), { type: contentType }));
form.set('width', '1024');
form.set('height', '1024');

const uploadResponse = await fetch(`${baseUrl}/api/public/uploads`, {
  method: 'POST',
  headers: { authorization: `Bearer ${apiKey}` },
  body: form,
});
const { asset } = await uploadResponse.json();
if (!uploadResponse.ok) throw new Error('Upload failed');

const generationResponse = await fetch(`${baseUrl}/api/generations`, {
  method: 'POST',
  headers: {
    authorization: `Bearer ${apiKey}`,
    'content-type': 'application/json',
  },
  body: JSON.stringify({
    generationType: 'image-to-image',
    modelId: 'gpt-img2',
    prompt: 'Keep the subject and turn it into a polished commercial poster',
    inputAssetIds: [asset.id],
  }),
});

const generation = await generationResponse.json();
if (!generationResponse.ok) throw new Error(generation.error?.message ?? 'Generation failed');
console.log(generation.batch.task.id);