# epoxy
Epoxy is an encrypted proxy for browser javascript. It allows you to make requests that bypass CORS without compromising security, by running SSL/TLS inside webassembly.

## Using the client
Epoxy must be run from within a web worker and must be served with the [security headers needed for `SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#security_requirements). Here is a simple usage example:
```javascript
import epoxy from "./epoxy-module-bundled.js";
// or
// importScripts("epoxy-bundled.js");

const { EpoxyClient, certs } = await epoxy();

let client = await new EpoxyClient("wss://localhost:4000", navigator.userAgent, 10);

// You can view the certificates compiled in
console.log(certs())

// You can view and change the user agent and redirect limit
console.log(client.userAgent);
client.redirect_limit = 5;

let response = await client.fetch("https://httpbin.org/get");
console.log(await response.text());
```
See `client/demo.js` for more examples.

## Using the server
```
$ cargo r -r --bin epoxy-server -- --help
Implementation of the Wisp protocol in Rust, made for epoxy.

Usage: epoxy-server [OPTIONS]

Options:
      --prefix <PREFIX>  [default: ]
  -p, --port <PORT>      [default: 4000]
  -b, --host <HOST>      [default: 0.0.0.0]
  -u, --unix-socket      
  -h, --help             Print help
  -V, --version          Print version
```

You can listen on a unix socket by passing the `--unix-socket` flag and the unix socket path in the `--host` flag. Example:
```
cargo r -r -- -u -b "/home/user/epoxy-socket"
```

## Building
> [!IMPORTANT]
> Rust nightly is required.

### Server
```
cargo b -r --bin epoxy-server
```
The executable will be placed at `target/release/epoxy-server`.

### Client
> [!IMPORTANT]
> Building the client is only supported on Linux.

Make sure you have the `wasm32-unknown-unknown` rust target, the `rust-std` component, and the `wasm-bindgen`, `wasm-opt`, and `base64` binaries installed.

In the `client` directory:
```
bash build.sh
```

To host a local server with the required headers:
```
python3 serve.py
```