Plume Brings Battle-Tested HTTP Security Headers to Gleam Developers

If you've built web applications in JavaScript or Node.js, you're probably familiar with Helmet—the middleware that makes setting secure HTTP headers almost effortless. Now, the Gleam ecosystem has its own answer: Plume, a library that brings sensible, production-ready security header defaults to Gleam web servers.

Why HTTP Security Headers Matter

Every time a browser communicates with your server, HTTP headers are part of the conversation. By default, browsers operate with fairly permissive settings. Security headers give you control over how browsers interpret and execute your content—protecting your users from attacks like cross-site scripting, clickjacking, and MIME-type sniffing.

Without these headers, you're leaving your applications and users exposed. It's like leaving your front door unlocked because you trust everyone who walks by.

Meet Plume: Helmet's Gleam Cousin

Plume takes inspiration from the hugely popular Helmet library and translates its security philosophy into idiomatic Gleam. It provides sensible defaults for the most important security headers while giving you the flexibility to customize them for your specific needs.

Here's what Plume helps you configure:

• Content-Security-Policy: Control which resources the browser can load, significantly reducing XSS risks
• X-Frame-Options: Prevent your site from being embedded in iframes (clickjacking protection)
• X-Content-Type-Options: Stop browsers from guessing content types, which can lead to execution vulnerabilities
• Strict-Transport-Security: Force HTTPS connections to protect against man-in-the-middle attacks
• X-XSS-Protection: Enable browser-based XSS filtering (though modern browsers handle this differently now)

Getting Started

Integration is straightforward. Plume is designed to work seamlessly with popular Gleam web frameworks, and you can apply security headers with minimal configuration. Most developers can get production-grade security headers working in just a few lines of code.

The library embraces Gleam's philosophy of explicitness and safety—you know exactly what headers you're setting and why.

A Step Forward for Gleam Security

Gleam has been gaining traction as a language that makes it easy to write correct, maintainable software. Plume extends this vision to web security, making it simpler for Gleam developers to ship applications that protect their users by default.

Security shouldn't be an afterthought, and it shouldn't require deep expertise in HTTP header specifications to get right. Plume brings the knowledge embedded in Helmet—refined over years of community feedback and real-world testing—to the Gleam ecosystem.

Whether you're building a small side project or a production system handling sensitive data, Plume gives you a solid foundation for HTTP security headers without needing to research every RFC and browser quirk yourself.

Check out the project on GitHub and consider adding it to your next Gleam project. Your users will thank you for the extra layer of protection.