community.general/library/windows/slurp.ps1

#!powershell
# WANT_JSON
# POWERSHELL_COMMON

# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.

$params = Parse-Args $args;

$src = '';
If ($params.src.GetType)
{
   $src = $params.src;
}
Else
{
   If ($params.path.GetType)
   {
      $src = $params.path;
   }
}
If (-not $src)
{

}

$bytes = [System.IO.File]::ReadAllBytes($src);
$content = [System.Convert]::ToBase64String($bytes);

$result = New-Object psobject;
Set-Attr $result "content" $content;
Set-Attr $result "encoding" "base64";
echo $result | ConvertTo-Json;