# 🔐 HTTP Privacy Specification v1.1
**Repository**: [AI-Robotic-Labs/http-privacy](https://github.com/AI-Robotic-Labs/http-privacy)
**Goal**: Empower developers to create modular, privacy-respecting HTTP clients or middleware in any environment (Rust, Python, WASM) following a unified spec. Your `HttpClient` already implements some core aspects.
---
## 📦 Core Capabilities (with Mapping to Implementation)
| Header Filtering | `whitelist` or `blacklist` | ✅ `js_headers_to_vec`, manual header control |
| Payload Obfuscation | `base64`, `xor`, `aes-gcm` | ✅ `base64::decode`, extendable |
| IP Masking | Remove or override headers | ⚠️ Manual header strip needed |
| TLS Enforcement | Force HTTPS or HSTS | ✅ `https_only(true)` in `reqwest::Client` |
| Logging Control | Redact / suppress logs | 🚫 Not yet implemented (placeholder fields exist) |
---
## 🧱 Architecture Overview
You support dual environments:
### 1. WASM / JS (via `wasm_bindgen`)
* Methods: `get_sync`, `post_sync`, `generate_image_sync`
* Input: `JsValue` headers → `[key, value]` arrays
* Output: `Result<String, JsValue>`
### 2. Python (via `PyO3`)
* Exposed: `HttpClientPy` class
* Methods: `get`, `post`, `generate_image`
* Integrated: error mapping, base64 decoding, file I/O
---
## 🔁 Request Flow (Middleware Logic)
```plaintext
[Client Request]
→ Parse Headers (Vec<(String, String)>)
→ Apply Privacy Rules:
→ Filter headers (blacklist/whitelist)
→ Obfuscate payload (if enabled)
→ Mask IP headers (if enabled)
→ Enforce TLS
→ Execute HTTP Request via reqwest
```
```plaintext
[Target Server Response]
→ Deobfuscate payload
→ Filter response headers
→ Return result to JS or Python
```
---
## ✅ JSON Config Example
To integrate a configuration-driven privacy layer:
```json
{
"filter_headers": {
"mode": "blacklist",
"headers": ["User-Agent", "Referer", "Cookie"]
},
"obfuscation": {
"enabled": true,
"method": "base64"
},
"ip_masking": {
"enabled": true,
"remove_headers": ["X-Forwarded-For", "CF-Connecting-IP"]
},
"tls_enforce": true,
"logging": "metadata"
}
```
This config can be injected into `HttpClient` on creation or dynamically applied per request.
---
## ⚙️ Developer Implementation Notes
To implement your own bindings or middleware:
* Use `Client::builder().https_only(true)` to enforce HTTPS.
* Provide header filtering logic before request.
* Enable `base64`, `xor`, or `aes-gcm` encoding for payloads.
* Strip common IP-related headers unless proxying is intentional.
* Avoid logging sensitive data (e.g., redact tokens).
* Keep the design modular (`HttpClient`, `HttpClientPy`, etc).
---
## 🧩 Optional Enhancements
| WASM-Compatible Obfuscation | Implement `aes-gcm` via `wasm-bindgen` or native Rust crate |
| IP Header Masking | Strip `X-Forwarded-For` inside `get/post` |
| Configurable JSON Inputs | Accept config objects for each call |
| Privacy Budget | Rate limit per IP/request/session |
| C++ Bridge | Already partially wired via `cxx::bridge` (`greet` placeholder) |
---
## 🔒 Security Best Practices
* ❌ No hardcoded secrets.
* ✅ Use `https_only` for TLS.
* 🔐 Add TLS pinning if needed (`rustls` + cert hash).
* 🧼 Sanitize header values and logs.
* 🛡️ Validate JSON input fields.
---
## 📄 License
MIT
---
## 🙌 Contributing
* Submit your Rust/Python/WASM crates via PR
* Suggest additional obfuscation strategies or privacy enhancements
* Help improve conformance tests for middleware plugins
---
## 🔧 Developer Guide: Creating Language Bindings from `lib.rs`
This guide explains how to use the existing `lib.rs` foundation in `http-privacy` to build native bindings for other languages like:
* **TypeScript (via WASM)**
* **Dart / Flutter**
* **C / C++**
* **Python (already implemented via PyO3)**
---
### 🧩 1. TypeScript / JavaScript (WASM)
Leverage `wasm-bindgen` and `wasm-pack` to generate bindings:
**Update `Cargo.toml`:**
```toml
[lib]
crate-type = ["cdylib"]
[dependencies]
wasm-bindgen = "0.2"
```
**Command to Build:**
```bash
wasm-pack build --target bundler --out-dir pkg
```
**In TypeScript:**
```ts
import init, { HttpClient } from './pkg/http_privacy';
async function run() {
await init();
const client = new HttpClient("your-api-key");
const response = client.get_sync("https://example.com", []);
console.log(response);
}
```
> ✅ Ideal for Node.js, Deno, or browser environments
---
### 📱 2. Dart / Flutter (via `flutter_rust_bridge`)
Install:
```bash
cargo install flutter_rust_bridge_codegen
```
**Project Layout:**
```
rust/ ← contains lib.rs
flutter_app/ ← your Flutter frontend
```
**In `lib.rs`:**
```rust
use flutter_rust_bridge::frb;
#[frb]
pub fn greet(name: String) -> String {
format!("Hello, {name}")
}
```
**Generate Bridge:**
```bash
flutter_rust_bridge_codegen \
--rust-input rust/src/lib.rs \
--dart-output flutter_app/lib/bridge_generated.dart
```
**In Flutter:**
```dart
import 'bridge_generated.dart';
final api = createRustImpl();
final message = await api.greet("Dart");
```
> ✅ Full async support with `tokio` + stream bridging available
---
### ⚙️ 3. C / C++ (via `cxx` or `cbindgen`)
You already use `cxx::bridge`. Extend it like this:
**In `lib.rs`:**
```rust
#[cxx::bridge]
mod ffi {
extern "Rust" {
fn greet(name: &str) -> String;
}
}
```
**Generate Header:**
```bash
cbindgen --config cbindgen.toml --crate http_privacy --output include/http_privacy.h
```
**In C/C++:**
```cpp
#include "http_privacy.h"
extern "C" {
const char* greet(const char* name);
}
```
> ✅ Use `cbindgen` for C headers, or `cxx` for safe C++ interop
---
### 🐍 4. Python (via `PyO3`)
Already implemented:
```python
from http_client_module import HttpClientPy
client = HttpClientPy(api_key="...", openai_url="...")
response = client.get("https://example.com", [("Authorization", "Bearer ...")])
```
To build:
```bash
maturin develop
# or
python3 setup.py develop
```
### 🍏 Swift Integration Example (macOS / iOS)
**Generate C Header:**
```bash
cbindgen --crate http_privacy --output include/http_privacy.h
```
**module.modulemap:**
```modulemap
module HttpPrivacy {
header "http_privacy.h"
export *
}
```
**Swift Bridging Example:**
```swift
import HttpPrivacy
let message = greet("Swift user")
print(String(cString: message))
```
---
### 🤖 Kotlin/Native Example (Multiplatform)
**Rust (lib.rs):**
```rust
#[no_mangle]
pub extern "C" fn greet(name: *const c_char) -> *mut c_char {
let c_str = unsafe { CStr::from_ptr(name) };
let name_str = c_str.to_str().unwrap_or("unknown");
let result = format!("Hello, {name_str}");
CString::new(result).unwrap().into_raw()
}
```
**Kotlin (using cinterop):**
```kotlin
fun main() {
val result = greet("Kotlin")
println(result?.toKString())
}
```
> Use Gradle plugin `konan` for native interop.
---
### 🦫 Go Integration Example (CGO)
**Rust (lib.rs):**
```rust
#[no_mangle]
pub extern "C" fn greet(name: *const c_char) -> *const c_char {
let name = unsafe { CStr::from_ptr(name) }.to_str().unwrap_or("User");
CString::new(format!("Hello, {name}")).unwrap().into_raw()
}
```
**Build as Shared Library:**
```bash
cargo build --release --target x86_64-unknown-linux-gnu
```
**Go Wrapper:**
```go
/*
#cgo LDFLAGS: -L. -lhttp_privacy
#include "http_privacy.h"
*/
import "C"
import "fmt"
func main() {
name := C.CString("Go User")
defer C.free(unsafe.Pointer(name))
msg := C.greet(name)
fmt.Println(C.GoString(msg))
}
```
---
By using these language bridges, you ensure full privacy-aware HTTP logic is **centralized in Rust** and reused across:
* 🧠 iOS/macOS (Swift)
* 📱 Android (Kotlin)
* 🐹 Backend / CLI tools (Go)
* 🌐 Web (WASM)
* 🐍 Python
---
## 🔐 Privacy-Conforming Bindings
Regardless of the language:
* Always apply header filtering and TLS checks before sending
* If using obfuscation (`base64`, `aes-gcm`), expose encoder/decoder to bindings
* All errors should be safely catchable in the target language