[Help Needed] Http Post Twitter Avatar Change

[Black Automation 20]

 Now When I use the below code it works just fine (SCG Socket Recorder)

 

   set(#poster, $plugin function("HTTP post.dll", "$http post", "https://twitter.com/i/profiles/update_profile_image", "authenticity_token={#authenticitytoken}&fileName=b.jpg&height=256&mediaId=589855740078268416&offsetLeft=0&offsetTop=0&page_context=home&scribeContext%5Bcomponent%5D=profile_image_upload&scribeElement=upload&section_context=home&uploadType=avatar&width=256", "Mozilla/5.0 (Windows NT 6.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.90 Safari/537.36", "https://twitter.com/", "", 20), "Global")

 

But, as soon as i try to edit the mediaID & file name this no longer works..

So how would one go about finding the "mediaID" before you try to upload the avatar?

 

 

set(#mediaids, $plugin function("HTTP post.dll", "$xpath parser index", #poster, "//input[@name=\'media_ids\']",0,  "value"), "Global")

set(#mediaids, $plugin function("File Management.dll", "$Find Regex First", #poster, "(?<=\"media_ids\":\").*(?=\"\})"), "Global")

 

Don't work because its trying to find these inside #poster before they exist.