CURL 无法使用文件流发送 POST 请求

Question

试图将文件流与其他数据一起发送到 API，但它返回错误：

The video provided was null

这是我的代码：

function create_video($files) {
    $api = "http://api.brightcove.com/services/post";

    $local_file_list = $files['file']['tmp_name'];

    foreach ($local_file_list as $local_file) {
        try {
            $fp = fopen($local_file, 'r');

            $ch = curl_init();

            if (FALSE === $ch) {
                throw new Exception('failed to initialize');
            }

            //"video":{"name":"test","shortDescription":"test","startDate":1432282741000,"endDate":null}
            $request = 'json={"params":{"encode_to":"MP4","create_multiple_renditions":"True","token":"' . WRITE_TOKEN . '"},"method":"create_video"}';

            curl_setopt($ch, CURLOPT_URL, $api);
            curl_setopt($ch, CURLOPT_POST, true);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $request);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($ch, CURLOPT_INFILE, $fp);
            curl_setopt($ch, CURLOPT_INFILESIZE, filesize($local_file));

            $content = curl_exec($ch);

            if (FALSE === $content) {
                throw new Exception(curl_error($ch), curl_errno($ch));
            }

            die(var_dump(json_decode($content)));

            return json_decode($content);
        } catch (Exception $e) {
            trigger_error(sprintf('Curl failed with error #%d: %s', $e->getCode(), $e->getMessage()), E_USER_ERROR);
        }
    }
}

有几点需要注意：

1. CURL 不返回错误，所以可能不是 CURL 引起的
2. filesize($local_file) 已返回正确的文件大小
3. fopen($local_file, 'r');返回流类型内容，所以文件存在

如何解决这个问题？谢谢

API 参考：

https://docs.brightcove.com/en/video-cloud/media/references/reference.html#Video_Write

更新：

感谢您的帮助，但它现在返回另一个错误：

POST methods require valid JSON-RPC in the POST body, with "method" and "params" properties

我有一些想法，因为当我查看请求负载时，它与正确的负载略有不同：

当前我的版本：

------WebKitFormBoundary8VABz8KuNRE8Hepd
Content-Disposition: form-data; name="file[0]"; filename="big_buck_bunny.mp4"
Content-Type: video/mp4


------WebKitFormBoundary8VABz8KuNRE8Hepd--

正确的版本

------WebKitFormBoundaryCAB6WEANBJxoB3Op
Content-Disposition: form-data; name="JSONRPC"

{"params":{"video":{"name":"test","shortDescription":"test","startDate":1432282741000,"endDate":null},"encode_to":"MP4","create_multiple_renditions":"True","token":"VyocgALDnxU8HPvmnSnckgmXjoPlYWomc2La5Tn-evuAfsnSPJJoow.."},"method":"create_video"}
------WebKitFormBoundaryCAB6WEANBJxoB3Op
Content-Disposition: form-data; name="filePath"; filename="big_buck_bunny.mp4"
Content-Type: video/mp4


------WebKitFormBoundaryCAB6WEANBJxoB3Op

    Content-Disposition: form-data; name="JSONView"

    {"params":{"video":{"name":"test","shortDescription":"test","startDate":1432282741000,"endDate":null},"encode_to":"MP4","create_multiple_renditions":"True","token":"VyocgALDnxU8HPvmnSnckgmXjoPlYWomc2La5Tn-evuAfsnSPJJoow.."},"method":"create_video"}
    ------WebKitFormBoundaryCAB6WEANBJxoB3Op--

Answer 1

您可以将要上传的文件打包成CURLFile (PHP >= 5.5)：

$cfile = new CURLFile($local_file, 'video/mp4', basename($local_file));

然后，添加到CURLOPT_POSTFIELDS，使其成为整个请求的一部分：

$ch = curl_init();
curl_setopt($ch, CURLOPT_POSTFIELDS, [
    'file' => $cfile,
    'JSONRPC' => '{"params":{"encode_to":"MP4","create_multiple_renditions":"True","token":"' . WRITE_TOKEN . '"},"method":"create_video"}';
]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$content = curl_exec($ch);

在 PHP 5.5 之前，您可以使用 @ 来指示文件：

curl_setopt($ch, CURLOPT_POSTFIELDS, [
    'file' => "@$local_file",
    'JSONRPC' => '{"params":{"encode_to":"MP4","create_multiple_renditions":"True","token":"' . WRITE_TOKEN . '"},"method":"create_video"}';
]);