dpxy

dpxy is a small, open-source HTTP proxy and caching tool. It is designed to be deployed as either a forward proxy for client networks or as a reverse proxy placed in front of origin servers. The main aim of dpxy is to improve web performance by storing copies of frequently requested responses and serving those cached copies to subsequent clients, thereby reducing bandwidth usage and load on upstream servers.

The typical dpxy setup centers on a single process that reads a configuration file. The configuration covers listening ports, cache directory and size limits, and the caching policies that govern when and how content is stored and refreshed. dpxy commonly supports per-URL caching rules, content-type filtering, and TTL-based expiration to control cache validity. Some deployments also leverage header and URL rewriting to enhance cacheability, particularly for dynamic content that can still benefit from caching under certain conditions. Administrative features such as logging and basic performance metrics are often included.

Usage scenarios for dpxy include networks with limited bandwidth, high-traffic websites, or testing environments where caching can help simulate user experiences with reduced origin server load. Administrators tune cache size, expiration policies, and bypass rules to balance freshness and hit rate while avoiding serving stale or inappropriate content. Because dynamic and user-specific content can be challenging to cache, careful configuration is essential to maintain privacy, correctness, and content integrity.

History and availability of dpxy vary by project and distribution, with references appearing in open-source repositories and performance-oriented documentation. See also HTTP proxy and caching proxy for related concepts.