Perl 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. Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# 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}}}'

my $sbCurl = Chilkat2::StringBuilder->new;
$sbCurl->AppendLn('curl -X POST https://api.example.com/data \\');
$sbCurl->AppendLn('  -H "Content-Type: application/json" \\');
$sbCurl->AppendLn('  -d \'{"name":"{{name}}","age":{{age}}}\'');

my $curl = Chilkat2::HttpCurl->new;

# Provide values for variables.
$curl->SetVar('name', 'Alice');
$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.
my $sbRawRequest = Chilkat2::StringBuilder->new;
my $success = $curl->ToRawRequest($sbCurl->GetAsString(), $sbRawRequest);
if (!$success) {
    print $curl->LastErrorText, "\n";
    exit;
}

print $sbRawRequest->GetAsString(), "\n";

# 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

$curl->EnableBodyVars(0);

$success = $curl->ToRawRequest($sbCurl->GetAsString(), $sbRawRequest);
if (!$success) {
    print $curl->LastErrorText, "\n";
    exit;
}

print $sbRawRequest->GetAsString(), "\n";

# The raw request with body variable substitution disable:

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