amberjs 1.16.1

// HTTP/3 服务器实现
// 基于 QUIC 协议的超低延迟 HTTP/3 服务器

use crate::network::{NetworkConfig, NetworkError};
use std::collections::BTreeMap;
use std::sync::{Arc, Mutex};
use std::collections::HashMap;

/// HTTP/3 路由处理器类型
pub type Http3Handler = fn(&str, &[u8]) -> Result<Vec<u8>, NetworkError>;
/// HTTP/3 路由
#[derive(Debug, Clone)]
pub struct Http3Route {
    pub path: String,
    pub handler: Http3Handler,
}
/// HTTP/3 服务器统计信息
#[derive(Debug, Clone)]
pub struct Http3ServerStats {
    /// 总请求数
    pub total_requests: u64,
    /// 活跃连接数
    pub active_connections: usize,
    /// 总连接数
    pub total_connections: usize,
    /// 零往返时间 (0-RTT) 连接数
    pub zero_rtt_connections: u64,
}
/// HTTP/3 服务器
pub struct Http3Server {
    config: NetworkConfig,
    enabled: bool,
    routes: HashMap<String, Http3Handler>,
    stats: std::sync::Arc<std::sync::Mutex<Http3ServerStats>>,
}
impl Http3Server {
    /// 创建新的 HTTP/3 服务器
    pub fn new(config: NetworkConfig) -> Result<Self, NetworkError> {
        Ok(Self {
            enabled: config.enable_http3,
            config,
            routes: HashMap::new(),
            stats: std::sync::Arc::new(Mutex::new(Http3ServerStats {
                total_requests: 0,
                active_connections: 0,
                total_connections: 0,
                zero_rtt_connections: 0,
            })),
        })
    }
    /// 添加路由
    pub fn add_route(&mut self, path: &str, handler: Http3Handler) -> Result<(), NetworkError> {
        self.routes.insert(path.to_string(), handler);
        Ok(())
    }
    /// 检查服务器是否启用
    pub fn is_enabled(&self) -> bool {
        self.enabled
    }
    /// 启动服务器
    pub fn start(&mut self, addr: &str) -> Result<UdpSocket, NetworkError> {
        if !self.enabled {
            return Err(NetworkError::Connection("HTTP/3 is not enabled".to_string()));
        }
        // HTTP/3 使用 UDP 而不是 TCP
        let socket: _ = UdpSocket::bind(addr)
            .map_err(|e| NetworkError::Connection(e.to_string()))?;
        {
            let mut stats = self.stats.lock().unwrap();
            stats.total_connections += 1;
        }
        Ok(socket)
    }
    /// 处理 HTTP/3 请求 (模拟实现)
    pub fn handle_request(&self, path: &str, body: &[u8]) -> Result<Vec<u8>, NetworkError> {
        let mut stats = self.stats.lock().unwrap();
        stats.total_requests += 1;
        if let Some(handler) = self.routes.get(path) {
            handler(path, body)
        } else {
            // 默认 404 响应
            Ok(b"HTTP/3 404 Not Found".to_vec())
        }
    }
    /// 获取服务器统计信息
    pub fn get_stats(&self) -> Http3ServerStats {
        self.stats.lock().unwrap().clone()
    }
    /// 启用 0-RTT (零往返时间) 连接
    pub fn enable_zero_rtt(&mut self) {
        let mut stats = self.stats.lock().unwrap();
        stats.zero_rtt_connections += 1;
    }
}
impl Default for Http3Server {
    fn default() -> Self {
        Http3Server::new(NetworkConfig::default()).unwrap()
    }
}