bf8bcdbd5d
- 拆分 refresh token 限流为独立中间件（30次/分 vs 登录5次/分） - 修复积分 recent-activity 500：JOIN 通过 points_account 中间表 - 修复患者/医生不存在返回 400 → 正确的 404 NotFound
354 lines
11 KiB
Rust
354 lines
11 KiB
Rust
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 std::sync::atomic::{AtomicU64, Ordering};
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use crate::state::AppState;
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/// Redis 连接失败时间戳缓存（毫秒），5 秒内复用失败状态避免重复连接尝试
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static REDIS_LAST_FAIL_MS: AtomicU64 = AtomicU64::new(0);
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const REDIS_FAIL_CACHE_SECS: u64 = 5;
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fn now_ms() -> u64 {
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std::time::SystemTime::now()
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.duration_since(std::time::UNIX_EPOCH)
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.unwrap_or_default()
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.as_millis() as u64
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}
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fn is_redis_cached_failed() -> bool {
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let last = REDIS_LAST_FAIL_MS.load(Ordering::Relaxed);
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last > 0 && now_ms().saturating_sub(last) < REDIS_FAIL_CACHE_SECS * 1000
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}
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fn mark_redis_failed() {
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REDIS_LAST_FAIL_MS.store(now_ms(), Ordering::Relaxed);
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}
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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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/// 账户锁定配置。
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const ACCOUNT_LOCKOUT_MAX_FAILURES: i64 = 5;
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const ACCOUNT_LOCKOUT_TTL_SECS: i64 = 900; // 15 分钟
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/// 基于 Redis 的 IP 限流中间件（登录等敏感操作，5 次/分钟）。
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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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let fail_close = state.config.rate_limit.fail_close;
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apply_rate_limit(
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RateLimitParams {
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redis_client: &state.redis,
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fail_close,
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max_requests: 5,
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window_secs: 60,
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prefix: "login",
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},
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&identifier,
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req,
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next,
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)
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.await
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}
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/// 基于 Redis 的 IP 限流中间件（Token 刷新，30 次/分钟）。
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pub async fn rate_limit_refresh_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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let fail_close = state.config.rate_limit.fail_close;
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apply_rate_limit(
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RateLimitParams {
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redis_client: &state.redis,
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fail_close,
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max_requests: 30,
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window_secs: 60,
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prefix: "refresh",
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},
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&identifier,
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req,
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next,
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)
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.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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let fail_close = state.config.rate_limit.fail_close;
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apply_rate_limit(
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RateLimitParams {
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redis_client: &state.redis,
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fail_close,
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max_requests: 300,
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window_secs: 60,
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prefix: "api",
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},
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&identifier,
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req,
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next,
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)
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.await
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}
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/// Redis 不可达时的安全响应（fail-close 模式）。
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fn service_unavailable(prefix: &str) -> Response {
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let body = RateLimitResponse {
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error: "Service Unavailable".to_string(),
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message: "服务暂时不可用，请稍后重试".to_string(),
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};
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tracing::error!("Redis 不可达，fail-close 模式拒绝请求 [{}]", prefix);
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(StatusCode::SERVICE_UNAVAILABLE, axum::Json(body)).into_response()
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}
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/// 限流参数，打包以避免函数签名过长。
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struct RateLimitParams<'a> {
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redis_client: &'a redis::Client,
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fail_close: bool,
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max_requests: u64,
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window_secs: u64,
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prefix: &'a str,
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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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params: RateLimitParams<'_>,
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identifier: &str,
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req: Request<Body>,
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next: Next,
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) -> Response {
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// 快速路径：Redis 在缓存期内已知不可用，跳过连接尝试
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if is_redis_cached_failed() {
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if params.fail_close {
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return service_unavailable(params.prefix);
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}
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return next.run(req).await;
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}
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let key = format!("rate_limit:{}:{}", params.prefix, identifier);
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let mut conn = match params.redis_client.get_multiplexed_async_connection().await {
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Ok(c) => c,
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Err(e) => {
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mark_redis_failed();
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tracing::warn!(error = %e, "Redis 连接失败 [{}]（{}秒内不再重试）", params.prefix, REDIS_FAIL_CACHE_SECS);
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if params.fail_close {
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return service_unavailable(params.prefix);
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}
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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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mark_redis_failed();
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tracing::warn!(error = %e, "Redis INCR 失败 [{}]", params.prefix);
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if params.fail_close {
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return service_unavailable(params.prefix);
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}
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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, params.window_secs as i64).await;
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}
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if count > params.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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/// 账户级登录锁定中间件。
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///
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/// 针对登录接口（POST /api/v1/auth/login），在 IP 限流之前执行：
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/// 1. 解析请求体提取 username
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/// 2. 检查 Redis 中该 username 的失败次数
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/// 3. 超过阈值（5次）则拒绝请求
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/// 4. 观察响应状态码：401 递增失败计数，200 清除计数
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pub async fn account_lockout_middleware(
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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 fail_close = state.config.rate_limit.fail_close;
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// 获取 Redis 连接
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let mut conn = match state.redis.get_multiplexed_async_connection().await {
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Ok(c) => c,
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Err(e) => {
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mark_redis_failed();
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tracing::warn!(error = %e, "Redis 连接失败 [login_lockout]");
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if fail_close {
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return service_unavailable("login_lockout");
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}
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return next.run(req).await;
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}
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};
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// 读取请求体以提取 username
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let (parts, body) = req.into_parts();
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let bytes = match axum::body::to_bytes(body, 1024).await {
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Ok(b) => b,
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Err(e) => {
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tracing::warn!(error = %e, "读取登录请求体失败，放行");
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let req = Request::from_parts(parts, Body::from(Vec::new()));
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return next.run(req).await;
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}
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};
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// 解析 username
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let username = serde_json::from_slice::<serde_json::Value>(&bytes)
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.ok()
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.and_then(|v| v.get("username")?.as_str().map(|s| s.to_string()));
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let username = match username {
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Some(u) if !u.is_empty() => u,
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_ => {
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let req = Request::from_parts(parts, Body::from(bytes.to_vec()));
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return next.run(req).await;
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}
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};
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// 检查账户锁定状态
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let lockout_key = format!("login_fail:{}", username);
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let fail_count: i64 = conn.get(&lockout_key).await.unwrap_or(0);
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if fail_count >= ACCOUNT_LOCKOUT_MAX_FAILURES {
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tracing::warn!(
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username = %username,
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fail_count = fail_count,
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"账户已被临时锁定"
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);
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let body = RateLimitResponse {
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error: "Too Many Requests".to_string(),
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message: "账户已被临时锁定，请15分钟后重试".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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// 用原始 body 重建请求，转发到 handler
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let req = Request::from_parts(parts, Body::from(bytes.to_vec()));
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let response = next.run(req).await;
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// 观察响应状态码
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let status = response.status();
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let (parts, body) = response.into_parts();
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let body_bytes = axum::body::to_bytes(body, 1024 * 1024)
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.await
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.unwrap_or_default();
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if status == StatusCode::UNAUTHORIZED {
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// 登录失败：递增失败计数
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let new_count: i64 = match redis::cmd("INCR")
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.arg(&lockout_key)
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.query_async(&mut conn)
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.await
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{
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Ok(n) => n,
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Err(e) => {
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tracing::warn!(error = %e, "Redis INCR 失败计数失败");
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let resp = Response::from_parts(parts, Body::from(body_bytes.to_vec()));
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return resp;
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}
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};
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// 首次失败时设置 TTL
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if new_count == 1 {
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let _: Result<(), _> = conn.expire(&lockout_key, ACCOUNT_LOCKOUT_TTL_SECS).await;
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}
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tracing::info!(
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username = %username,
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fail_count = new_count,
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remaining = ACCOUNT_LOCKOUT_MAX_FAILURES - new_count,
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"登录失败，递增失败计数"
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);
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} else if status.is_success() {
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// 登录成功：清除失败计数
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let _: Result<(), _> = conn.del(&lockout_key).await;
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tracing::info!(username = %username, "登录成功，清除失败计数");
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}
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// 重建并返回原始响应
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Response::from_parts(parts, Body::from(body_bytes.to_vec()))
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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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/// BLE 网关级别的限流中间件。
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///
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/// 从 GatewayAuthContext 中读取 gateway_id 作为标识符。
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/// 限制每个网关设备 60 req/60s。
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/// 必须在 gateway_auth_middleware 之后挂载（需要认证上下文）。
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pub async fn rate_limit_by_gateway(
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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_health::gateway_auth::GatewayAuthContext>()
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.map(|ctx| ctx.gateway_id.clone())
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.unwrap_or_else(|| "unknown_gateway".to_string());
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let fail_close = state.config.rate_limit.fail_close;
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apply_rate_limit(
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RateLimitParams {
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redis_client: &state.redis,
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fail_close,
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max_requests: 60,
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window_secs: 60,
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prefix: "gateway",
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},
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&identifier,
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req,
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next,
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)
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.await
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}
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