b08e8b5ab5
后端: - rate_limit 中间件新增 RedisAvailability 缓存 - Redis 不可用时跳过限流，30 秒冷却后再重试 - 避免 get_multiplexed_async_connection 每次请求阻塞 2 秒 前端: - plugin store schema 加载改为 Promise.allSettled 并行（原为 for...of 顺序） - 先基于 entities 渲染回退菜单，schema 加载完成后更新 - 移除 Home useEffect 中 unreadCount 依赖，消除双重 fetch - MainLayout 使用选择性 store selector 减少重渲染
176 lines
4.9 KiB
Rust
176 lines
4.9 KiB
Rust
use std::sync::atomic::{AtomicBool, Ordering};
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use std::time::Instant;
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use axum::body::Body;
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use axum::extract::State;
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use axum::http::{Request, StatusCode};
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use axum::middleware::Next;
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use axum::response::{IntoResponse, Response};
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use redis::AsyncCommands;
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use serde::Serialize;
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use tokio::sync::Mutex;
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use crate::state::AppState;
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/// 限流错误响应。
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#[derive(Serialize)]
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struct RateLimitResponse {
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error: String,
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message: String,
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}
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/// 限流参数（预留配置化扩展）。
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#[allow(dead_code)]
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pub struct RateLimitConfig {
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/// 窗口内最大请求数。
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pub max_requests: u64,
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/// 窗口大小（秒）。
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pub window_secs: u64,
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/// Redis key 前缀。
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pub key_prefix: String,
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}
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/// Redis 可用性状态缓存，避免重复连接失败时阻塞。
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struct RedisAvailability {
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available: AtomicBool,
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last_check: Mutex<Instant>,
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}
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impl RedisAvailability {
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fn new() -> Self {
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Self {
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available: AtomicBool::new(true),
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last_check: Mutex::new(Instant::now() - std::time::Duration::from_secs(60)),
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}
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}
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/// 检查是否应该尝试连接 Redis。
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/// 如果上次连接失败且冷却期未过，返回 false。
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async fn should_try(&self) -> bool {
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if self.available.load(Ordering::Relaxed) {
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return true;
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}
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let mut last = self.last_check.lock().await;
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// 连接失败后冷却 30 秒再重试
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if last.elapsed() > std::time::Duration::from_secs(30) {
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*last = Instant::now();
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true
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} else {
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false
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}
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}
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fn mark_ok(&self) {
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self.available.store(true, Ordering::Relaxed);
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}
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async fn mark_failed(&self) {
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self.available.store(false, Ordering::Relaxed);
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*self.last_check.lock().await = Instant::now();
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}
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}
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/// 全局 Redis 可用性缓存
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static REDIS_AVAIL: std::sync::OnceLock<RedisAvailability> = std::sync::OnceLock::new();
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fn redis_avail() -> &'static RedisAvailability {
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REDIS_AVAIL.get_or_init(RedisAvailability::new)
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}
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/// 基于 Redis 的 IP 限流中间件。
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///
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/// 使用 INCR + EXPIRE 实现固定窗口计数器。
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/// 超限返回 HTTP 429 Too Many Requests。
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pub async fn rate_limit_by_ip(
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State(state): State<AppState>,
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req: Request<Body>,
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next: Next,
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) -> Response {
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let identifier = extract_client_ip(req.headers());
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apply_rate_limit(&state.redis, &identifier, 5, 60, "login", req, next).await
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}
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/// 基于 Redis 的用户限流中间件。
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///
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/// 从 TenantContext 中读取 user_id 作为标识符。
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pub async fn rate_limit_by_user(
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State(state): State<AppState>,
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req: Request<Body>,
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next: Next,
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) -> Response {
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let identifier = req
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.extensions()
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.get::<erp_core::types::TenantContext>()
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.map(|ctx| ctx.user_id.to_string())
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.unwrap_or_else(|| "anonymous".to_string());
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apply_rate_limit(&state.redis, &identifier, 100, 60, "write", req, next).await
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}
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/// 执行限流检查。
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async fn apply_rate_limit(
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redis_client: &redis::Client,
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identifier: &str,
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max_requests: u64,
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window_secs: u64,
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prefix: &str,
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req: Request<Body>,
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next: Next,
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) -> Response {
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let avail = redis_avail();
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// 快速跳过：Redis 不可达时直接放行
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if !avail.should_try().await {
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return next.run(req).await;
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}
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let key = format!("rate_limit:{}:{}", prefix, identifier);
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let mut conn = match redis_client.get_multiplexed_async_connection().await {
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Ok(c) => {
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avail.mark_ok();
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c
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}
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Err(e) => {
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tracing::warn!(error = %e, "Redis 连接失败，跳过限流");
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avail.mark_failed().await;
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return next.run(req).await;
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}
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};
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let count: i64 = match redis::cmd("INCR").arg(&key).query_async(&mut conn).await {
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Ok(n) => n,
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Err(e) => {
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tracing::warn!(error = %e, "Redis INCR 失败，跳过限流");
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return next.run(req).await;
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}
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};
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// 首次请求设置 TTL
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if count == 1 {
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let _: Result<(), _> = conn.expire(&key, window_secs as i64).await;
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}
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if count > max_requests as i64 {
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let body = RateLimitResponse {
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error: "Too Many Requests".to_string(),
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message: "请求过于频繁，请稍后重试".to_string(),
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};
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return (StatusCode::TOO_MANY_REQUESTS, axum::Json(body)).into_response();
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}
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next.run(req).await
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}
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/// 从请求头中提取客户端 IP。
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fn extract_client_ip(headers: &axum::http::HeaderMap) -> String {
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headers
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.get("x-forwarded-for")
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.or_else(|| headers.get("x-real-ip"))
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.and_then(|v| v.to_str().ok())
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.map(|s| {
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// x-forwarded-for 可能包含多个 IP，取第一个
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s.split(',').next().unwrap_or(s).trim().to_string()
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})
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.unwrap_or_else(|| "unknown".to_string())
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}
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