PowerBuilder

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. PowerBuilder

integer li_rc
integer li_Success
oleobject loo_SbCurl
oleobject loo_Curl
oleobject loo_SbRawRequest

li_Success = 0

// 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}}}'

loo_SbCurl = create oleobject
li_rc = loo_SbCurl.ConnectToNewObject("Chilkat.StringBuilder")
if li_rc < 0 then
    destroy loo_SbCurl
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_SbCurl.AppendLn("curl -X POST https://api.example.com/data ~")
loo_SbCurl.AppendLn("  -H ~"Content-Type: application/json~" ~")
loo_SbCurl.AppendLn("  -d '{~"name~":~"{{name}}~",~"age~":{{age}}}'")

loo_Curl = create oleobject
li_rc = loo_Curl.ConnectToNewObject("Chilkat.HttpCurl")

// Provide values for variables.
loo_Curl.SetVar("name","Alice")
loo_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.
loo_SbRawRequest = create oleobject
li_rc = loo_SbRawRequest.ConnectToNewObject("Chilkat.StringBuilder")

li_Success = loo_Curl.ToRawRequest(loo_SbCurl.GetAsString(),loo_SbRawRequest)
if li_Success = 0 then
    Write-Debug loo_Curl.LastErrorText
    destroy loo_SbCurl
    destroy loo_Curl
    destroy loo_SbRawRequest
    return
end if

Write-Debug loo_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 0

loo_Curl.EnableBodyVars = 0

li_Success = loo_Curl.ToRawRequest(loo_SbCurl.GetAsString(),loo_SbRawRequest)
if li_Success = 0 then
    Write-Debug loo_Curl.LastErrorText
    destroy loo_SbCurl
    destroy loo_Curl
    destroy loo_SbRawRequest
    return
end if

Write-Debug loo_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}}}


destroy loo_SbCurl
destroy loo_Curl
destroy loo_SbRawRequest