Php 模仿GUZLE中的curl 工作脚本(分块数据和二进制上传一起)

我有可以完美工作的curl命令(通过稳定API使用img2img):

curl --request POST 'https://api.stability.ai/v1/generation/stable-diffusion-xl-1024-v1-0/image-to-image' \
    --header 'Content-Type: multipart/form-data' \
    --header 'Accept: application/json' \
    --header 'Authorization: Bearer somesecrettoken' \
    --form 'init_image=@"/full/path/to/init_image.png"' \
    --form 'text_prompts[0][text]=Beautiful php code' \
    --output '/full/path/to/response.json'

我已经在GUZLE v.6.5.8中try 了这段PHP代码，它给出了HTTP520:

(new Client())
->post(
    'https://api.stability.ai/v1/generation/stable-diffusion-xl-1024-v1-0/image-to-image',
    [
        RequestOptions::HEADERS   => [
            'Accept'        => 'application/json',
            'Authorization' => 'Bearer somesecrettoken',
            'Content-Type'  => 'multipart/form-data',
        ],
        RequestOptions::MULTIPART => [
            [
                'name'     => 'text_prompts[0][text]',
                'contents' => 'Beautiful php code',
            ],
            [
                'name'     => 'init_image',
                'contents' => (new File('/full/path/to/init_image.png'))->getContent(),
//                'contents' => \GuzzleHttp\Psr7\Utils::tryFopen('/full/path/to/init_image.png', 'rb'), // This won't work too
            ],
        ],
        RequestOptions::SINK      => '/full/path/to/response.json',
        RequestOptions::DEBUG     => true,
    ],
)

我在这里做错了什么？