reinhardt-server

HTTP server implementation for Reinhardt framework

Overview

`reinhardt-server` provides a high-performance HTTP server implementation for Reinhardt applications, built on Hyper with support for WebSockets and GraphQL.

Features

Implemented ✓

This crate provides the following features:

• Core HTTP Server: High-performance HTTP/1.1 server

  • Async request processing with Tokio runtime
  • Custom handler support via Handler trait
  • Middleware pipeline for request/response processing
  • Builder pattern for middleware configuration
  • Efficient TCP connection management
  • Automatic request/response conversion
  • Built-in error handling

• WebSocket Support (feature = "websocket"): WebSocket server implementation

  • tokio-tungstenite based WebSocket server
  • Custom message handler support
  • Broadcast support for multiple clients
  • Client connection management with automatic registration/unregistration
  • Connection lifecycle hooks (on_connect, on_disconnect)
  • Text and binary message handling
  • Automatic connection management

• GraphQL Support (feature = "graphql"): GraphQL endpoint integration

  • async-graphql integration
  • Schema builder for Query and Mutation roots
  • POST request handling for GraphQL queries
  • JSON response serialization
  • Error handling for GraphQL errors

Installation

Add reinhardt to your Cargo.toml:

[dependencies]
reinhardt = { version = "0.1.0-rc.25", features = ["server"] }

# For WebSocket support:
# reinhardt = { version = "0.1.0-rc.25", features = ["server", "websocket"] }

# For GraphQL support:
# reinhardt = { version = "0.1.0-rc.25", features = ["server", "graphql"] }

# Or use a preset:
# reinhardt = { version = "0.1.0-rc.25", features = ["standard"] }  # Recommended
# reinhardt = { version = "0.1.0-rc.25", features = ["full"] }      # All features

Then import server features:

use reinhardt::server::{serve, HttpServer};
use reinhardt::server::{WebSocketServer, WebSocketHandler};  // WebSocket
use reinhardt::server::graphql_handler;  // GraphQL

Note: Server features are included in the standard and full feature presets.

Usage

Basic HTTP Server

use reinhardt::server::{serve, HttpServer};
use reinhardt::http::{Request, Response};
use reinhardt::core::exception::Error;
use std::sync::Arc;

async fn my_handler(req: Request) -> Result<Response, Error> {
    Ok(Response::ok().with_body("Hello, world!"))
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let handler = Arc::new(my_handler);
    serve("0.1.0-rc.25:8000", handler).await?;
    Ok(())
}

HTTP Server with Middleware

use reinhardt::server::HttpServer;
use reinhardt::http::{Handler, Middleware, Request, Response};
use reinhardt::core::exception::Error;
use std::sync::Arc;

struct MyHandler;

#[async_trait::async_trait]
impl Handler for MyHandler {
    async fn handle(&self, _req: Request) -> Result<Response, Error> {
        Ok(Response::ok().with_body("Hello from handler!"))
    }
}

struct LoggingMiddleware;

#[async_trait::async_trait]
impl Middleware for LoggingMiddleware {
    async fn process(&self, request: Request, next: Arc<dyn Handler>) -> Result<Response, Error> {
        println!("Request: {} {}", request.method, request.uri);
        let response = next.handle(request).await?;
        println!("Response: {}", response.status);
        Ok(response)
    }
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let handler = Arc::new(MyHandler);
    let middleware = Arc::new(LoggingMiddleware);

    let server = HttpServer::new(handler)
        .with_middleware(middleware);

    server.listen("0.1.0-rc.25:8000".parse()?).await?;
    Ok(())
}

WebSocket Server

use reinhardt::server::{WebSocketServer, WebSocketHandler};
use std::sync::Arc;

struct EchoHandler;

#[async_trait::async_trait]
impl WebSocketHandler for EchoHandler {
    async fn handle_message(&self, message: String) -> Result<String, String> {
        Ok(format!("Echo: {}", message))
    }

    async fn on_connect(&self) {
        println!("Client connected");
    }

    async fn on_disconnect(&self) {
        println!("Client disconnected");
    }
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let handler = Arc::new(EchoHandler);
    let server = WebSocketServer::new(handler);
    server.listen("0.1.0-rc.25:9001".parse()?).await?;
    Ok(())
}

WebSocket Server with Broadcast

use reinhardt::server::{WebSocketServer, WebSocketHandler};
use std::sync::Arc;

struct ChatHandler;

#[async_trait::async_trait]
impl WebSocketHandler for ChatHandler {
    async fn handle_message(&self, message: String) -> Result<String, String> {
        Ok(format!("Received: {}", message))
    }
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let handler = Arc::new(ChatHandler);
    let server = WebSocketServer::new(handler)
        .with_broadcast(100); // Enable broadcast with capacity of 100 messages

    // Clone broadcast manager to send messages from other tasks
    let broadcast_manager = server.broadcast_manager().unwrap().clone();

    // Spawn a task to send periodic broadcasts
    tokio::spawn(async move {
        loop {
// tokio::time::sleep(tokio::time::Duration::from_secs(5)).await;
            broadcast_manager.broadcast("Server announcement!".to_string()).await;
        }
    });

    server.listen("0.1.0-rc.25:9001".parse()?).await?;
    Ok(())
}

GraphQL Server

use reinhardt::server::graphql_handler;
use async_graphql::{Object, Schema, EmptyMutation, EmptySubscription};

struct QueryRoot;

#[Object]
impl QueryRoot {
    async fn hello(&self) -> String {
        "Hello, GraphQL!".to_string()
    }
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let schema = Schema::build(QueryRoot, EmptyMutation, EmptySubscription)
        .finish();

    let handler = graphql_handler(schema);
    serve("0.1.0-rc.25:8000", handler).await?;
    Ok(())
}

server

Features

Implemented ✓

Core HTTP Server

• HTTP/1.1 Server: High-performance HTTP/1.1 server implementation based on Hyper
• Async Request Processing: Full asynchronous processing with Tokio runtime
• Custom Handler Support: Add custom logic by implementing the Handler trait
• TCP Connection Management: Efficient TCP connection management and task spawning
• Request/Response Conversion: Automatic conversion between Hyper requests and reinhardt-http Request/Response
• Error Handling: Automatically converts handler errors to 500 error responses

WebSocket Support (feature = "websocket")

• WebSocket Server: WebSocket server implementation based on tokio-tungstenite
• Custom Message Handlers: Customize message processing via the WebSocketHandler trait
• Connection Lifecycle Hooks: Handle connection events with on_connect and on_disconnect
• Text/Binary Messages: Process text messages and echo binary messages
• Automatic Connection Management: Automatic handling of WebSocket connection establishment, message loops, and closure
• Peer Information: Access to client SocketAddr information

GraphQL Support (feature = "graphql")

• GraphQL Handler: GraphQL endpoint support with async-graphql integration
• Schema Builder: Automatic schema construction from Query and Mutation roots
• POST Request Processing: Execute GraphQL queries via POST requests
• JSON Responses: Automatic JSON serialization of GraphQL execution results
• Error Handling: Proper handling and response of GraphQL errors
• Empty Subscriptions: Uses EmptySubscription by default

Convenience Functions

• serve() function: Helper function providing easy HTTP server startup
• serve_websocket() function: Helper function providing easy WebSocket server startup
• graphql_handler() function: Simplifies Arc wrapping of GraphQL handlers

Graceful Shutdown

• ShutdownCoordinator: Graceful shutdown coordination mechanism
  • Signal handling (SIGTERM, SIGINT)
  • Wait for existing connections to complete
  • Shutdown with timeout processing
  • Shutdown notification via broadcast channel
• shutdown_signal(): Listen for OS shutdown signals
• listen_with_shutdown(): Start server with graceful shutdown support
• serve_with_shutdown(): Convenience function with graceful shutdown support
• with_shutdown(): Add shutdown handling to Futures

HTTP/2 Support

• Http2Server: HTTP/2 protocol server implementation
  • Uses hyper-util's HTTP/2 builder
  • Full asynchronous request processing
  • Graceful shutdown support
  • Uses same Handler trait as HTTP/1.1
• serve_http2(): Easy HTTP/2 server startup
• serve_http2_with_shutdown(): HTTP/2 server startup with graceful shutdown support

Request Timeouts

• TimeoutHandler: Request timeout middleware
  • Configurable timeout duration
  • Returns 408 Request Timeout response on timeout
  • Can wrap any Handler
  • Fully tested

Rate Limiting

• RateLimitHandler: Rate limiting middleware
  • IP address-based rate limiting
  • Supports Fixed Window and Sliding Window strategies
  • Configurable window period and maximum request count
  • Returns 429 Too Many Requests response when rate limit exceeded
• RateLimitConfig: Rate limit configuration
  • per_minute(): Per-minute rate limiting
  • per_hour(): Per-hour rate limiting
  • Custom configurable

Advanced HTTP Features

• Middleware Pipeline: Middleware chain for request/response processing
• Connection Pooling: Efficient HTTP connection pooling mechanism
• Request Logging: Structured request logging

WebSocket Advanced Features

• Broadcast Support: Message broadcasting to multiple clients
• Room-Based Management: Manage clients by rooms
• Message Compression: WebSocket message compression support
• Heartbeat/Ping-Pong: Connection alive check mechanism
• Authentication/Authorization: Authentication and authorization for WebSocket connections

GraphQL Advanced Features

• Subscription Support: Real-time GraphQL subscriptions
• DataLoader Integration: DataLoader for solving N+1 problems
• GraphQL Playground: GraphQL IDE integration
• File Uploads: File uploads via GraphQL
• Batch Queries: Batch execution of multiple queries

Testing & Monitoring

• Metrics: Server metrics collection and publishing
• Health Checks: Server health check endpoints
• Tracing: Distributed tracing support

License

Licensed under the BSD 3-Clause License.