Xbase++ 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. Xbase++

LOCAL nSuccess
LOCAL oSbCurl
LOCAL oCurl
LOCAL oSbRawRequest

nSuccess := 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}}}'

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

oCurl := CreateObject("Chilkat.HttpCurl")

//  Provide values for variables.
oCurl:SetVar("name", "Alice")
oCurl: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.
oSbRawRequest := CreateObject("Chilkat.StringBuilder")
nSuccess := oCurl:ToRawRequest(oSbCurl:GetAsString(), oSbRawRequest)
IF (nSuccess == 0)
    ? oCurl:LastErrorText
    oSbCurl:destroy()
    oCurl:destroy()
    oSbRawRequest:destroy()
    RETURN
ENDIF

? oSbRawRequest: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

oCurl:EnableBodyVars := 0

nSuccess := oCurl:ToRawRequest(oSbCurl:GetAsString(), oSbRawRequest)
IF (nSuccess == 0)
    ? oCurl:LastErrorText
    oSbCurl:destroy()
    oCurl:destroy()
    oSbRawRequest:destroy()
    RETURN
ENDIF

? oSbRawRequest:GetAsString()

//  The raw request with body variable substitution disable:

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

oSbCurl:destroy()
oCurl:destroy()
oSbRawRequest:destroy()