Android Facebook Video Upload with Graph API - 如何使用 multipart/form-data

Question

我正在实现 Video Upload with Graph API而且我不明白 block 部分。它说

The request parameters are:

• upload_phase (enum) - Set to transfer upload_session_id (int32) - The
• session id returned in the start phase start_offset (int32) - Start
• byte position of this chunk video_file_chunk (multipart/form-data) -
• The video chunk, encoded as form data

他们提供了下一个例子

curl \
  -X POST \
  "https://graph-video.facebook.com/v2.3/1533641336884006/videos"  \
  -F "access_token=XXXXXXX" \
  -F "upload_phase=transfer" \
  -F “start_offset=0" \
  -F "upload_session_id=1564747013773438" \
  -F "video_file_chunk=@chunk1.mp4"

我不明白 video_file_chunk 部分。如何将其编码为 multipart/form-data？我得到的只是一个文件，我可以从中读取字节。

Answer 1

我使用 Android Async 找到了解决方案图书馆

Ion.with(context)
                .load(url)
                .uploadProgress(progressCallback)
                .setMultipartParameter("access_token", AccessToken.getCurrentAccessToken().getToken())
                .setMultipartParameter("upload_phase", "transfer")
                .setMultipartParameter("upload_session_id", Long.toString(uploadSessionId))
                .setMultipartParameter("start_offset", Long.toString(startOffset))
                .setMultipartFile("video_file_chunk", chunkFile)
                .asByteArray()
                .setCallback(completeCallback);