Visual FoxPro

curl with Variable Substitution in the Request Body

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

LOCAL lnSuccess
LOCAL loSbCurl
LOCAL loCurl
LOCAL loSbRawRequest

lnSuccess = 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}}}'

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

loCurl = CreateObject('Chilkat.HttpCurl')

* Provide values for variables.
loCurl.SetVar("name","Alice")
loCurl.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.
loSbRawRequest = CreateObject('Chilkat.StringBuilder')
lnSuccess = loCurl.ToRawRequest(loSbCurl.GetAsString(),loSbRawRequest)
IF (lnSuccess = 0) THEN
    ? loCurl.LastErrorText
    RELEASE loSbCurl
    RELEASE loCurl
    RELEASE loSbRawRequest
    CANCEL
ENDIF

? loSbRawRequest.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

loCurl.EnableBodyVars = 0

lnSuccess = loCurl.ToRawRequest(loSbCurl.GetAsString(),loSbRawRequest)
IF (lnSuccess = 0) THEN
    ? loCurl.LastErrorText
    RELEASE loSbCurl
    RELEASE loCurl
    RELEASE loSbRawRequest
    CANCEL
ENDIF

? loSbRawRequest.GetAsString()

* The raw request with body variable substitution disable:

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

RELEASE loSbCurl
RELEASE loCurl
RELEASE loSbRawRequest