---
layout: page
published: true
noToc: false
noComments: false
noDate: false
title: Fun - cURL (libcurl) extension (optional)
subtitle: Documentation for cURL (libcurl) extension (optional)
description: Documentation for cURL (libcurl) extension (optional)
permalink: /documentation/extensions/curl/
lang: en
tags:
- curl
- extension
- libcurl
- optional
---

- CMake option: FUN_WITH_CURL=ON
- Purpose: HTTP helpers using libcurl.
- Homepage: [https://curl.se/libcurl/](https://curl.se/libcurl/){:class="ext"}

## Opcodes:

- OP_CURL_GET: GET; pops url:string; pushes body:string (empty on error/disabled)
- OP_CURL_POST: POST; pops body:string, url:string; pushes response:string
- OP_CURL_DOWNLOAD: Download to file; pops path:string, url:string; pushes 1/0

## Notes:

- Requires libcurl development headers/libs.
- When disabled, helpers return empty strings/0 to match optional behavior.