Scramjet Proxy

Unlike traditional proxies that simply forward traffic, Scramjet acts as a sophisticated, modern middleware, rewriting web content on the fly to deliver an uncompromised browsing experience. This article explores what Scramjet is, how it works, its advantages, and why it's considered the next generation of web proxy technology. What is Scramjet Proxy?

proxy.run().then(() => console.log('Forward proxy listening on 9000'));

requests, decode URLs, and rewrite content before it reaches the page. WASM-Based Rewriting scramjet proxy

: For performance optimization, Scramjet employs WebAssembly (WASM) to handle the intensive task of rewriting page content, ensuring fast load times despite the heavy processing. Context Management : It operates across two contexts: the Window context (managing frames and communication) and the Service worker context (handling the actual request interception). Key Features Broad Site Compatibility : It supports complex platforms including , and even GeForce NOW CAPTCHA Support

manages the proxy's behavior, including custom URL encoding (codecs) and feature flags. javascript ScramjetController '@mercuryworkshop/scramjet' scramjet = ScramjetController({ prefix: // The URL prefix for proxied requests files: wasm: '/scramjet.wasm.wasm' , all: '/scramjet.all.js' , , flags: { strictRewrites: // Enhances security and accuracy captureErrors: // Useful for debugging site compatibility Use code with caution. Copied to clipboard 3. Implementing Custom Codecs Key Features Broad Site Compatibility : It supports

For developers, the project’s modular architecture and detailed documentation make it an appealing platform for building custom censorship circumvention tools. For end users, Scramjet offers one of the most capable and performant options available for accessing a free and open web.

| Metric | Scramjet Proxy | Node.js http-proxy | Nginx (buffer) | |----------------------------|----------------|--------------------|----------------| | Memory per connection | ~2 KB | ~8 KB | ~1 KB | | 99th percentile latency | +1.2 ms | +2.5 ms | +0.8 ms | | Throughput (10k req/s) | 820 MB/s | 710 MB/s | 950 MB/s | | Built-in stream transforms | ✅ | ❌ (needs middleware) | ❌ (needs Lua) | upstream: 'https://api.example.com' )

In this article, we will explore the principles of scramjet technology, the benefits of using a scramjet proxy, and the potential applications of this innovative propulsion system.

Scramjet has already been adopted by numerous projects and services. It’s used by many proxy aggregators and unblocker services, including , Incognito , AnuraOS , and others. The project has received 414 stars on GitHub, has 745 forks , and is used by over 219 dependent projects and repositories .

[User Browser] ---> (Scramjet Service Worker / Interceptor) ---> [Scramjet Proxy Server] ---> [Restricted Website] | [User Browser] <--- (Dynamic Resource Rewriting) <------------- [Scramjet Proxy Server] <------------+ 1. Request Interception via Service Workers

const proxy = new Proxy( port: 8080, upstream: 'https://api.example.com' );