Update the content of an uploaded attachment

curl --request POST \
     --url https://api.campaign.episerver.net/rest/{clientId}/attachments/{attachmentId}/content \
     --header 'accept: application/json' \
     --header 'content-type: multipart/form-data' \
     --form 'file=@"/path/to/file"'

var myHeaders = new Headers();
myHeaders.append("accept", "application/json");
myHeaders.append("content-type", "multipart/form-data");

var formdata = new FormData();
formdata.append("file", fileInput.files[0], "file");

var requestOptions = {
   method: 'POST',
   headers: myHeaders,
   body: formdata,
   redirect: 'follow'
};

fetch("https://api.campaign.episerver.net/rest/{clientId}/attachments/{attachmentId}/content", requestOptions)
   .then(response => response.text())
   .then(result => console.log(result))
   .catch(error => console.log('error', error));

require "uri"
require "net/http"

url = URI("https://api.campaign.episerver.net/rest/{clientId}/attachments/{attachmentId}/content")

https = Net::HTTP.new(url.host, url.port)
https.use_ssl = true

request = Net::HTTP::Post.new(url)
request["accept"] = "application/json"
request["content-type"] = "multipart/form-data"
form_data = [['file', File.open('/path/to/file')]]
request.set_form form_data, 'multipart/form-data'
response = https.request(request)
puts response.read_body

import requests

url = "https://api.campaign.episerver.net/rest/{clientId}/attachments/{attachmentId}/content"

payload = {}
files=[
   ('file',('file',open('/path/to/file','rb'),'application/octet-stream'))
]
headers = {
   'accept': 'application/json',
   'content-type': 'multipart/form-data'
}

response = requests.request("POST", url, headers=headers, data=payload, files=files)

print(response.text)

// The attachment content was updated successfully.
{
  "id": "",
  "owner": "",
  "name": "",
  "uploaded": false,
  "fileName": "",
  "type": "",
  "mimeType": "",
  "size": "",
  "created": "",
  "modified": "",
  "links": [
    {
      "uriBuilder": {},
      "rels": [
        ""
      ],
      "rel": "",
      "type": "",
      "params": "",
      "title": "",
      "uri": ""
    }
  ]
}

// The attachment could not be found. Ensure that the required parameters such as "attachmentId" are correct and the attachment exists.