Powershell Request Post Benchmark (Powershell CURL POST benchmark alternative)

ps-post-benchmark.ps1

##########################################################
# ps-post-benchmark.ps1
# 
# A powershell script to make a POST to a remote URI
# and measure the response time.
# 
# Useful when a client only has Powershell.
#
# Copyright 2023 eric@issfl.com
# 
# Permission is hereby granted, free of charge, to any person 
# obtaining a copy of this software and associated documentation 
# files (the "Software"), to deal in the Software without 
# restriction, including without limitation the rights to use, 
# copy, modify, merge, publish, distribute, sublicense, and/or 
# sell copies of the Software, and to permit persons to whom the 
# Software is furnished to do so, subject to the following 
# conditions:
# 
# The above copyright notice and this permission notice shall 
# be included in all copies or substantial portions of the 
# Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 
# PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR 
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
# 
##########################################################

# Set the URI to connect to
$uri = "https://some-host.local"
# Set the full path to a log file
$outfilePath = "C:\Users\eric\Documents\request-log.txt"

# Set request headers
$headers = New-Object "System.Collections.Generic.Dictionary[[String],[String]]"
$headers.Add("Content-Type", "application/json")
$headers.Add("Authorization", "Bearer some-token")

# Get the current timestamp
$timestamp = Get-Date
# Epoch Step 1: Get the current DateTimeOffset
$dateTimeOffset = [System.DateTimeOffset]::Now
# Epoich Step 2: Calculate the Unix Epoch time (number of seconds since January 1, 1970)
$epochTime = $dateTimeOffset.ToUnixTimeMilliseconds()

# Set request body
$body = @"
{
    `"param1`": `"some-val-1`",
    `"param2`": `"some-val-2`",
    `"timestamp`": $epochTime
}
"@

# Ignore certificate validation errors (so that we can use self-signed certs on the remote)
# Comment this out if connecting to a server with a trusted cert!
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { $true }

# Create a new WebClient object
$webClient = New-Object System.Net.WebClient

# Set the headers into the webClient
foreach ($header in $headers.Keys) {
    $webClient.Headers.Add($header, $headers[$header])
}

# Convert the body to bytes
$bodyBytes = [System.Text.Encoding]::UTF8.GetBytes($body)

try {
  # Make the request while measuring timeElapsed
  $elapsedTime = MEasure-Command {
    # Make the HTTP POST request
    $responseBytes = $webClient.UploadData($uri, 'POST', $bodyBytes)

    # Convert the response bytes to a string
    $responseString = [System.Text.Encoding]::UTF8.GetString($responseBytes)    
  }
  # Write values to the request log file
  "$timestamp|| $epochTime|| OK|| $($elapsedTime.TotalSeconds)" | Out-File -FilePath $outfilePath -Append
  
} catch {
  
  # Write values to the request log file
  "$timestamp|| $epochTime|| NK $($_.Exception.Message)|| 0" | Out-File -FilePath $outfilePath -Append
}