36 lines
671 B
Go
36 lines
671 B
Go
package helpers
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import (
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"net"
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"net/http"
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"sync"
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"golang.org/x/time/rate"
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)
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var visitors = make(map[string]*rate.Limiter)
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var mu sync.Mutex
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func GetVisitorLimiter(ip string) *rate.Limiter {
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mu.Lock()
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defer mu.Unlock()
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limiter, exists := visitors[ip]
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if !exists {
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limiter = rate.NewLimiter(1, 5)
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visitors[ip] = limiter
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}
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return limiter
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}
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func RateLimit(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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ip, _, _ := net.SplitHostPort(r.RemoteAddr)
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if !GetVisitorLimiter(ip).Allow() {
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http.Error(w, "Too many requests", http.StatusTooManyRequests)
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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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