48 lines
1.7 KiB
Go
48 lines
1.7 KiB
Go
package middleware
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// 本文件提供带 metrics 埋点的限流 / 并发中间件版本;
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// 由于原 ratelimit_middleware.go 在本仓库的云盘同步下被永久占用,
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// 这里用独立实现覆盖路由使用入口,旧实现保留为未引用代码。
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//
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// 行为与原 ratelimit_middleware.go 完全一致,只是多了 metrics 调用。
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import (
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"log"
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"net/http"
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"github.com/volcano-tts/tts-api/metrics"
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)
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// RateLimitWithMetrics 是 middleware.RateLimit 的可埋点版本。
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func RateLimitWithMetrics(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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clientIP := GetClientIP(r)
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if !GlobalRateLimiter.Allow(clientIP) {
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log.Printf("警告: 已超过IP速率限制，拒绝请求 - 客户端IP: %s", clientIP)
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SendJSONError(w, http.StatusTooManyRequests, "Rate limit exceeded. Please try again later.", "rate_limit_error", "rate_limit_exceeded")
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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// ConcurrencyLimitWithMetrics 是 middleware.ConcurrencyLimit 的可埋点版本。
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func ConcurrencyLimitWithMetrics(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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select {
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case ConcurrencySem <- struct{}{}:
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metrics.ConcurrencyActive.Inc(nil)
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defer func() {
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<-ConcurrencySem
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metrics.ConcurrencyActive.Dec(nil)
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}()
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next.ServeHTTP(w, r)
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default:
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metrics.ConcurrencyRejected.Inc(nil)
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log.Printf("警告: 已达到最大并发请求数限制，拒绝请求 - 客户端IP: %s", GetClientIP(r))
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SendJSONError(w, http.StatusServiceUnavailable, "Server is busy, maximum concurrent requests reached. Please try again later.", "concurrency_limit_error", "max_concurrent_requests")
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return
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}
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})
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}
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