使用requests.post遇到问题

[zhuhuadeaa]

我现在需要上传图片到网站，然后获取相应的json url.
url地址：http://www.soogif.com/compress
高手帮忙看看怎么能把图片成功上传。。。现在不管怎么弄都是报错，要么是“未知错误”，要么是“不支持大小”。直接使用页面上的按钮上传就没有任何问题。
图片是通过JS上传的。

headers:

Request URL: http://tool-compress.soogif.com/zip/fileUpload
Request Method: POST
Status Code: 200
Remote Address: 118.25.162.180:80
Referrer Policy: no-referrer-when-downgrade
Connection: keep-alive
Content-Type: application/json;charset=UTF-8
Date: Thu, 27 Sep 2018 03:36:26 GMT
Set-Cookie: JSESSIONID=D5CA2CE8F59E60A7A5F7F75FC5A60C10; Path=/; HttpOnly
Transfer-Encoding: chunked
Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: keep-alive
Content-Length: 1411146
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryaWdydC69jHgQ73CI
Cookie: UM_distinctid=1660a76e8acb8-08c84a291f101b-50432518-232800-1660a76e8ae289; gr_user_id=4b69a4a6-ae76-4a13-8dc8-8697cafa4ad9; Hm_lvt_37c68c083c2c85fe183a5e0224eb35a9=1537773857; gr_session_id_beb66a1ac816845f=5621aa97-4346-4901-bbfd-d5fcc9a432eb; CNZZDATA1260067336=1523678646-1537769382-http%253A%252F%252Fwww.soogif.com%252F%7C1538017544; gr_session_id_beb66a1ac816845f_5621aa97-4346-4901-bbfd-d5fcc9a432eb=true; Hm_lpvt_37c68c083c2c85fe183a5e0224eb35a9=1538019314; JSESSIONID=27B5008864F3BE1C71BDC5296AC7424C
Host: tool-compress.soogif.com
Origin: http://tool-compress.soogif.com
Referer: http://tool-compress.soogif.com/html/tool/CompressMain.html
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.92 Safari/537.36
X-Requested-With: XMLHttpRequest
file: (binary)
type: S_2M
imageUrl: