Perl

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. Perl

use chilkat();

$success = 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}}}'

$sbCurl = chilkat::CkStringBuilder->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}}}'");

$curl = chilkat::CkHttpCurl->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.
$sbRawRequest = chilkat::CkStringBuilder->new();
$success = $curl->ToRawRequest($sbCurl->getAsString(),$sbRawRequest);
if ($success == 0) {
    print $curl->lastErrorText() . "\r\n";
    exit;
}

print $sbRawRequest->getAsString() . "\r\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->put_EnableBodyVars(0);

$success = $curl->ToRawRequest($sbCurl->getAsString(),$sbRawRequest);
if ($success == 0) {
    print $curl->lastErrorText() . "\r\n";
    exit;
}

print $sbRawRequest->getAsString() . "\r\n";

# The raw request with body variable substitution disable:

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