Lianja

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. Lianja

llSuccess = .F.

// 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("CkStringBuilder")
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("CkHttpCurl")

// 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("CkStringBuilder")
llSuccess = loCurl.ToRawRequest(loSbCurl.GetAsString(),loSbRawRequest)
if (llSuccess = .F.) then
    ? loCurl.LastErrorText
    release loSbCurl
    release loCurl
    release loSbRawRequest
    return
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 .F.

loCurl.EnableBodyVars = .F.

llSuccess = loCurl.ToRawRequest(loSbCurl.GetAsString(),loSbRawRequest)
if (llSuccess = .F.) then
    ? loCurl.LastErrorText
    release loSbCurl
    release loCurl
    release loSbRawRequest
    return
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