Rust 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. Rust

// 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}}}'

let sb_curl = chilkat::StringBuilder::new();
let _ = sb_curl.append_ln("curl -X POST https://api.example.com/data \\");
let _ = sb_curl.append_ln("  -H \"Content-Type: application/json\" \\");
let _ = sb_curl.append_ln("  -d '{\"name\":\"{{name}}\",\"age\":{{age}}}'");

let curl = chilkat::HttpCurl::new();

// Provide values for variables.
curl.set_var("name", "Alice");
curl.set_var("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.
let sb_raw_request = chilkat::StringBuilder::new();
if curl.to_raw_request(&sb_curl.get_as_string().unwrap_or_default(), &sb_raw_request).is_err() {
    println!("{}", curl.last_error_text());
    return;
}

println!("{}", sb_raw_request.get_as_string().unwrap_or_default());

// 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.set_enable_body_vars(false);

if curl.to_raw_request(&sb_curl.get_as_string().unwrap_or_default(), &sb_raw_request).is_err() {
    println!("{}", curl.last_error_text());
    return;
}

println!("{}", sb_raw_request.get_as_string().unwrap_or_default());

// The raw request with body variable substitution disable:

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