Facebook Graph API Multipart Photo Upload, Multiple Parts

POST https://graph.facebook.com/v2.12/<PAGE_ID>/photos HTTP/1.1
Host: graph.facebook.com
User-Agent: curl/7.52.1
Accept: */*
Content-Length: 3077
Expect: 100-continue
Content-Type: multipart/form-data; boundary=------------------------e94f377a15b0500f

--------------------------e94f377a15b0500f
Content-Disposition: form-data; name="access_token"

<ACCESS_TOKEN>
--------------------------e94f377a15b0500f
Content-Disposition: form-data; name="caption"

This is the message I wanna post.
--------------------------e94f377a15b0500f
Content-Disposition: form-data; name="filedata"; filename="square.png"
Content-Type: image/png

<IMAGE_DATA>
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