(PowerShell) Creating an application/json HTTP POST Request

Demonstrates how to create an HTTP POST request having the Content-Type application/json, where the body of the HTTP request is the following JSON:

{
   "username" : "my_username",
   "password" : "my_password",
   "validation-factors" : {
      "validationFactors" : [
         {
            "name" : "remote_address",
            "value" : "127.0.0.1"
         }
      ]
   }
}

The generated HTTP request looks like this:

POST /something HTTP/1.1
Content-Type: application/json
Accept: application/json
Host: domain
Content-Length: 216

{
  "username": "my_username",
  "password": "my_password",
  "validation-factors": {
    "validationFactors": [
      {
        "name": "remote_address",
        "value": "127.0.0.1"
      }
    ]
  }
}

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# This example demonstrates building an application/json request.

$req = New-Object Chilkat.HttpRequest

# The ContentType, HttpVerb, and Path properties should
# always be explicitly set.
$req.HttpVerb = "POST"
$req.Path = "/something"
$req.ContentType = "application/json"

# We may wish to add an "Accept" header to the request.
# This tells the server we'll accept an application/json response.
$req.AddHeader("Accept","application/json")

# We'll use Chilkat's JSON API to create the JSON body of the HTTP request.
$json = New-Object Chilkat.JsonObject
$json.AppendString("username","my_username")
$json.AppendString("password","my_password")
$vFactors = $json.AppendObject("validation-factors")
$vArray = $vFactors.AppendArray("validationFactors")
$vArray.AddObjectAt(0)
$factorObj = $vArray.ObjectAt(0)
$factorObj.AppendString("name","remote_address")
$factorObj.AppendString("value","127.0.0.1")

# Use the JSON for the HTTP request body
# By default, the Emit method will output compact JSON.
# This is best for generating the smallest size request.
# To generate a more human-readable (pretty-printed) JSON request body,
# set the EmitCompact property to FALSE
$json.EmitCompact = $false
$req.LoadBodyFromString($json.Emit(),"utf-8")

# View the request that would be sent if SynchronousRequest was called:
$requestMime = $req.GenerateRequestText()
$($requestMime)

# A few important comments about the HTTP request that is generated:
# 
# 1) The Content-Length header is automatically generated based on the actual length of the MIME message
#    that follows the intial (topmost) MIME header.
# 2) The HOST header will automatically get filled in with the actual domain when SynchronousRequest
#    is called