Sample code for 30+ languages & platforms
PowerShell Requires Chilkat v11.5.0+

curl with Variable Substitution in the Request Body

See more CURL Examples

This example demonstrates using variables located in the request body with the {{variable_name}} syntax.

Chilkat PowerShell Downloads

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

$success = $false

#  Variables can also be used within the HTTP request body.
#  Variable names are enclosed between {{ and }}

#  Here is a curl command with two variables {{name}} and {{age}} located in the data.

#  curl -X POST https://api.example.com/data \
#    -H "Content-Type: application/json" \
#    -d '{"name":"{{name}}","age":{{age}}}'

$sbCurl = New-Object Chilkat.StringBuilder
$sbCurl.AppendLn("curl -X POST https://api.example.com/data \`")
$sbCurl.AppendLn("  -H `"Content-Type: application/json`" \`")
$sbCurl.AppendLn("  -d '{`"name`":`"{{name}}`",`"age`":{{age}}}'")

$curl = New-Object Chilkat.HttpCurl

#  Provide values for variables.
$curl.SetVar("name","Alice")
$curl.SetVar("age","30")

#  To demonstrate how the variables are replaced, this example does not execute the curl command. 
#  Instead, it generates the raw HTTP request that would be sent if the curl command were run.
$sbRawRequest = New-Object Chilkat.StringBuilder
$success = $curl.ToRawRequest($sbCurl.GetAsString(),$sbRawRequest)
if ($success -eq $false) {
    $($curl.LastErrorText)
    exit
}

$($sbRawRequest.GetAsString())

#  Output:

#  POST /data HTTP/1.1
#  Host: api.example.com
#  Content-Type: application/json
#  Content-Length: 25
#  
#  {"name":"Alice","age":30}

#  --------------------------------------------------------------------------------------------------
#  Note: Variable substitution in the request body can be turned off by 
#  setting the EnableBodyVars property equal to $false

$curl.EnableBodyVars = $false

$success = $curl.ToRawRequest($sbCurl.GetAsString(),$sbRawRequest)
if ($success -eq $false) {
    $($curl.LastErrorText)
    exit
}

$($sbRawRequest.GetAsString())

#  The raw request with body variable substitution disable:

#  Host: api.example.com
#  Content-Type: application/json
#  Content-Length: 33
#  
#  {"name":"{{name}}","age":{{age}}}