Powershell equivalent to curl -F to upload a file

Question

I need to upload files via commandline / powershell. It works fine with

curl -F "[email protected]" https://api.anonfiles.com/upload

However, curl does not exist on Windows Server 2016 and I do not want to tell my clients to set it up. So I am looking for a powershell alternative to accomplish this task. I tried various solutions, but none of them worked. What I tried so far:

(1)

$postParams = @{file='C:\users\user\testfile.txt'}; Invoke-WebRequest -Uri https://api.anonfiles.com/upload -Method POST -Body $postParams

(2)

Invoke-WebRequest -UseBasicParsing https://api.anonfiles.com/upload -ContentType "application/json" -Method POST -InFile "C:\users\user\testfile.txt"

(3)

$file=[io.file]::readallbytes('c:\users\user\testfile.txt')
Invoke-WebRequest -UseBasicParsing https://api.anonfiles.com/upload -ContentType "application/json" -Method POST -Body "{ '@file':'"$file"'}"

None of it works. I canot believe it's so hard to replace an curl oneliner in powershell... The error in each case is a 400 http error, the request is wrong. How do I send the above mentioned curl-request equivalent in powershell? The site is https://anonfiles.com/docs/api

Answer 1

I gave up. It's not possible in Powershell. My App will just download curl.exe as standalone from now on, if it's not there.