Example of uploading a file with brackets in the name

ExampleBracketFileUpload.ps1

New-Item -ItemType File -Path 'c:\temp\[a].txt' -value 'Test' -Force
Invoke-RestMethod -InFile 'c:\temp\`[a`].txt' -Method Post -Uri https://httpbin.org/post -ContentType 'text/plain'

<#

Result:

args    :
data    : Test
files   :
form    :
headers : @{Content-Length=4; Content-Type=text/plain; Host=httpbin.org; User-Agent=Mozilla/5.0 (Windows NT 10.0;
          Microsoft Windows 10.0.17134; en-US) PowerShell/6.1.2}
json    :
origin  : 199.116.118.170, 199.116.118.170
url     : https://httpbin.org/post

#>