使用易语言提交post上传临时素材 图片，提示多媒体素材为空44001

提交的数据应该怎样写呢，图片文件路径 要怎样写？

POST https://qyapi.weixin.qq.com/cgi-bin/media/upload?access_token=accesstoken001&type=file HTTP/1.1

Content-Type: multipart/form-data; boundary=-------------------------acebdf13572468

Content-Length: 220

---------------------------acebdf13572468

Content-Disposition: form-data; name="media";filename="C:\ewm.jpg"; filelength=98304

Content-Type: application/octet-stream

mytext

---------------------------acebdf13572468--