（营销）图片上传

通过本接口上传图片后可获得图片url地址。图片url可在微信支付营销相关的API使用，包括商家券、代金券、支付有礼等。

请求参数	类型	描述
body	object	multipart/form-data 数据结构
file	object	媒体图⽚只⽀持JPG、BMP、PNG格式，⽂件⼤⼩不能超过2M。
meta	string	媒体文件元信息，使用json表示，包含两个参数：sha256、filename
sha256	string	图片文件的sha256摘要
filename	string	商户上传的媒体图片的名称，商户自定义，必须以JPG、BMP、PNG为后缀

异步纯链式

$media = new \WeChatPay\Util\MediaUtil('file:///path/to/image.jpg');

$instance->v3->marketing->favor->media->imageUpload->postAsync([
  'body' => $media->getStream(),
  'headers' => [
    'Content-Type' => $media->getContentType(),
  ],
])
->then(static function(\Psr\Http\Message\ResponseInterface $response) {
  print_r(json_decode((string) $response->getBody(), true));
})
->wait();

异步声明式

$media = new \WeChatPay\Util\MediaUtil('file:///path/to/image.jpg');

$instance->chain('v3/marketing/favor/media/image-upload')->postAsync([
  'body' => $media->getStream(),
  'headers' => [
    'Content-Type' => $media->getContentType(),
  ],
])
->then(static function(\Psr\Http\Message\ResponseInterface $response) {
  print_r(json_decode((string) $response->getBody(), true));
})
->wait();

异步属性式

$media = new \WeChatPay\Util\MediaUtil('file:///path/to/image.jpg');

$instance['v3/marketing/favor/media/image-upload']->postAsync([
  'body' => $media->getStream(),
  'headers' => [
    'Content-Type' => $media->getContentType(),
  ],
])
->then(static function(\Psr\Http\Message\ResponseInterface $response) {
  print_r(json_decode((string) $response->getBody(), true));
})
->wait();

同步纯链式

$media = new \WeChatPay\Util\MediaUtil('file:///path/to/image.jpg');

$response = $instance->v3->marketing->favor->media->imageUpload->post([
  'body' => $media->getStream(),
  'headers' => [
    'Content-Type' => $media->getContentType(),
  ],
]);
print_r(json_decode((string) $response->getBody(), true));

同步声明式

$media = new \WeChatPay\Util\MediaUtil('file:///path/to/image.jpg');

$response = $instance->chain('v3/marketing/favor/media/image-upload')->post([
  'body' => $media->getStream(),
  'headers' => [
    'Content-Type' => $media->getContentType(),
  ],
]);
print_r(json_decode((string) $response->getBody(), true));

同步属性式

$media = new \WeChatPay\Util\MediaUtil('file:///path/to/image.jpg');

$response = $instance['v3/marketing/favor/media/image-upload']->post([
  'body' => $media->getStream(),
  'headers' => [
    'Content-Type' => $media->getContentType(),
  ],
]);
print_r(json_decode((string) $response->getBody(), true));

返回字典	类型	描述
media_url	string	媒体文件URL地址

参阅 官方文档