pacparser ☆

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Description:
Library to parse proxy auto-config (PAC) files

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Networking

Tags: networking proxy pac c-library developer-tools

Install: brew install pacparser

About:
Pacparser is a lightweight C library designed to parse Proxy Auto-Config (PAC) files, which are used to determine the appropriate proxy for a given URL. It provides a simple API to evaluate JavaScript-based PAC functions, enabling applications to implement dynamic proxy selection without a full browser engine. Its primary value is offering a robust, embeddable solution for network applications requiring proxy configuration logic.

Key Features:

Lightweight C library for easy integration
Parses and evaluates standard JavaScript PAC files
Includes a command-line tool for testing and debugging
Supports both HTTP and SOCKS proxy configurations

Use Cases:

Embedding proxy logic into custom network clients or servers
Building command-line utilities to test PAC file validity
Implementing dynamic proxy selection in non-browser applications

Alternatives:

node-pacparser – Node.js wrapper around the native pacparser library, suitable for JavaScript environments.
libproxy – A more comprehensive proxy configuration library that also handles PAC but is larger in scope and size.

Version History

Detected	Version	Rev	Change	Commit
May 25, 2023 6:12pm		0	VERSION_BUMP	afa05b4a