🦀 RustFlask

High-performance web framework with Flask-like API design

RustFlask combines the familiar, developer-friendly API of Python Flask with Rust's unparalleled performance and safety guarantees. Built on Tokio and Hyper, it delivers production-ready async performance without compromising ease of use.

🚀 Why RustFlask?

For Developers Who Want:

• ✅ Familiar Flask-like syntax without learning curve
• ✅ 3.1x performance improvement over Python Flask
• ✅ Memory safety with zero runtime overhead
• ✅ Async/await support built on Tokio runtime
• ✅ Type safety with compile-time error checking
• ✅ UTF-8 native support for international applications

📦 Quick Start

Add to your Cargo.toml:

[dependencies]
rust_flask = { path = "./rust_flask" }

Create your first app in minutes:

use rust_flask::{FlaskApp, text_response, json_response};

#[tokio::main]
async fn main() {
    let app = FlaskApp::new();

    app.get("/", |_req, _params| {
        text_response("Hello, RustFlask! 🚀")
    }).await;

    app.get("/api/data", |_req, _params| {
        json_response(&serde_json::json!({"message": "High performance JSON!"}))
    }).await;

    app.run([127, 0, 0, 1], 8080).await;
}

✨ Core Features

🛣️ Routing & URL Parameters

• Dynamic routing with {param} syntax (e.g., /users/{id})
• Multiple parameters support (e.g., /posts/{post_id}/comments/{comment_id})
• Easy parameter access via params.get("param_name")

🔄 HTTP Methods

• Method-specific helpers: get() and post() for clean routing
• Flexible routing: route() for custom method handling
• Method detection: Built-in HTTP method validation

📋 Request & Response

• JSON parsing: Type-safe request body parsing with Json<T>
• Response helpers: text_response() and json_response() built-in
• UTF-8 support: Native international text handling

⚙️ Configuration

• Debug mode: Development-friendly error reporting
• Custom settings: Flexible host/port configuration
• Runtime options: Tokio-based async runtime

🚀 Performance Foundation

• Built on Hyper: Production-ready HTTP server
• Tokio runtime: Efficient async/await support
• Zero-cost abstractions: No runtime overhead

Usage

Add to your Cargo.toml:

[dependencies]
rust_flask = { path = "./rust_flask" }

Example

use rust_flask::{FlaskApp, text_response, json_response};
use hyper::{Method, Response, Body, StatusCode};

#[tokio::main]
async fn main() {
    let app = FlaskApp::new();

    // Add routes
    app.route("/", |req, _params| {
        if req.method() == Method::GET {
            text_response("Hello, World!")
        } else {
            Response::builder()
                .status(StatusCode::METHOD_NOT_ALLOWED)
                .body(Body::from("Method not allowed"))
                .unwrap()
        }
    }).await;

    app.route("/json", |req, _params| {
        if req.method() == Method::GET {
            let data = vec!["hello", "world"];
            json_response(&data)
        } else {
            Response::builder()
                .status(StatusCode::METHOD_NOT_ALLOWED)
                .body(Body::from("Method not allowed"))
                .unwrap()
        }
    }).await;

    // Start server
    app.run([127, 0, 0, 1], 8080).await;
}

🎨 Interactive Examples

🏆 Performance Showcase

# Complete benchmark report with live demos
cargo run --example complete_benchmark_showcase  # http://localhost:8086/

🎭 Modern Designs

# Tech magazine style showcase
cargo run --example combined_demo               # http://localhost:8085/

# Corporate professional style
cargo run --example fixed_beautiful_showcase   # http://localhost:8084/

📚 Learning Examples

# Basic feature demonstration
cargo run --example showcase                    # http://localhost:8081/

# Enhanced functionality demo
cargo run --example enhanced_example            # http://localhost:8083/

# Interactive playground
cargo run --example fancy_showcase              # http://localhost:8082/

# UTF-8 encoding test
cargo run --example test_encoding               # http://localhost:8001/

Testing

cargo test

📚 API Reference

🏗️ FlaskApp - Core Application

Method	Description
new()	Create new app with default configuration
with_config(config)	Create app with custom settings
route(path, handler).await	Register flexible route handler
get(path, handler).await	Register GET route handler
post(path, handler).await	Register POST route handler
run(addr, port).await	Start the HTTP server
config()	Get configuration reference

⚙️ FlaskConfig - Server Configuration

Field	Type	Description
debug	bool	Enable development mode with detailed errors
host	String	Server bind address (e.g., "127.0.0.1")
port	u16	Server port number

🎯 RouteParams - URL Parameters

Field/Method	Description
params	HashMap<String, String> - All captured parameters
get(key)	Get parameter value by name
insert(key, value)	Add or update parameter

🛠️ Helper Functions

Function	Description	Example
text_response(content)	Create text/plain response	text_response("Hello World!")
json_response(data)	Create JSON response	json_response(&json!({"key": "value"}))

📋 Request Parsing

Method	Description
Json::<T>::from_request(req)	Parse JSON request body with type safety

🔧 URL Parameter Syntax

Use {parameter} syntax in route paths:

• /users/{id} - Single parameter capture
• /posts/{post_id}/comments/{comment_id} - Multiple parameters
• Parameters accessible via params.get("param_name")

🏆 Performance Benchmarks

Comprehensive benchmarking against Python Flask demonstrates significant performance advantages:

🚀 Throughput Performance

• RustFlask: 3,847 requests/second
• Python Flask: 1,242 requests/second
• Performance Improvement: 3.1x faster

⚡ Response Time

• RustFlask: 2.6ms average response time
• Python Flask: 8.1ms average response time
• Latency Reduction: 68% improvement

🎯 Peak Performance

• RustFlask: 4,156 RPS (peak)
• Python Flask: 1,398 RPS (peak)
• Memory Usage: 28MB vs 72MB (2.6x more efficient)

🛡️ Reliability

• Success Rate: 100% (RustFlask) vs 95.1% (Flask)
• Memory Safety: Zero runtime overhead
• Type Safety: Compile-time error prevention

📊 Benchmark Methodology

• Test Environment: Apple M1 Pro, 16GB RAM, macOS 15.5
• Concurrency: 10 concurrent connections
• Total Requests: 800 across 8 endpoint types
• Measurement: High-precision microsecond accuracy

🔬 Benchmarking & Development

📊 Running Benchmarks

# Execute comprehensive performance comparison
cd benchmarks
python benchmark_runner.py

# Results saved to: reports/benchmark_results.json
# Visual report: reports/magazine_benchmark_report.html

🧪 Development Setup

# Clone and build
git clone <repository-url>
cd rust_flask
cargo build

# Run tests
cargo test

# Check code quality
cargo clippy
cargo fmt

📈 Technical Architecture

🏗️ Core Components

• Hyper HTTP Server: Production-ready HTTP/1.1 implementation
• Tokio Runtime: Efficient async task scheduling
• Serde: High-performance serialization/deserialization
• Chrono: Date/time handling with timezone support

🛡️ Safety Features

• Memory Safety: Zero-cost ownership system prevents leaks
• Type Safety: Compile-time error detection
• Thread Safety: Fearless concurrency without data races
• UTF-8 Safety: Built-in Unicode text handling

⚡ Performance Optimizations

• Zero-copy parsing: Minimal memory allocations
• Connection pooling: Efficient connection reuse
• Async I/O: Non-blocking request handling
• Compiled efficiency: Native machine code execution

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🤝 Contributing

We welcome contributions! Please see our contributing guidelines and feel free to:

• 🐛 Report bugs via GitHub issues
• 💡 Suggest features through discussions
• 📝 Submit pull requests for improvements
• 📖 Improve documentation and examples

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgments

• Flask Team for the inspiration and excellent API design
• Rust Community for the incredible ecosystem and tooling
• Tokio Project for the robust async runtime
• Hyper Team for the production-ready HTTP server

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🦀 Built with Rust - Performance Without Compromise