http2curl

A Steel Scheme library that translates http format requests into curl commands.

Features

• Parse http format requests (REST Client format)
• Generate valid curl commands with proper shell escaping
• Support for all HTTP methods (GET, POST, PUT, DELETE, PATCH, etc.)
• Variable substitution with {{varName}} syntax
• Multiple requests per file (separated by ###)
• Accepts list of strings (perfect for Helix editor)
• Request bodies (JSON, plain text, multiline)
• External file references (< filepath)
• Optional response headers flag (-i)
• Single-file library for easy deployment

Quick Start

(require "http2curl.scm")

;; Simple GET request
(http->curl "GET https://api.example.com/users HTTP/1.1" '())
;; => ("curl https://api.example.com/users")

;; POST with JSON and variables
(http->curl
  "POST {{baseUrl}}/users HTTP/1.1
Content-Type: application/json

{\"name\":\"{{userName}}\"}"
  '(("baseUrl" . "https://api.example.com")
    ("userName" . "John Doe")))
;; => ("curl -X POST -H \"Content-Type: application/json\" --data-raw '{\"name\":\"John Doe\"}' https://api.example.com/users")

;; Multi-selection (Helix editor)
(http->curl
  '("GET https://api.example.com/users HTTP/1.1"
    "GET https://api.example.com/posts HTTP/1.1"
    "GET https://api.example.com/comments HTTP/1.1")
  '())
;; => ("curl https://api.example.com/users"
;;     "curl https://api.example.com/posts"
;;     "curl https://api.example.com/comments")

See USAGE.md for complete documentation and examples.

Installation

Copy http2curl.scm to your project directory or Steel load path.

Testing

steel tests/test.scm                 # Run test suite
steel tests/test-multi-selection.scm # Run tests for list input
steel tests/validate.scm             # Run validation tests with real endpoints

License

MIT License - Copyright (c) 2025 Tom Waddington

See LICENSE file for details.