# UploadedFilesService.upload custom sdkHandler

```ts
return await this.container.sdk.httpClient.post(
  this.generatePrefix("/upload", {}),
  body.data,
  {
    headers: {
      ...this.container.sdk.generateHeadersFromRequestConfig(config),
      "Content-Type": "multipart/form-data",
      "X-Filename": body.filename || "",
      "X-Upload-Progress": body.onUploadProgress ? "true" : "false",
    },
    onUploadProgress: body.onUploadProgress,
  }
);
```