john-okeefe
7db8bde4bb
- Add rate limiter middleware (10 requests/minute per IP) - Apply rate limiting to POST /api/auth/register and /api/auth/login - Prevents brute force attacks and registration spam - Automatic cleanup of old request records Closes security issue: No rate limiting on auth endpoints
117 lines
2.4 KiB
Go
117 lines
2.4 KiB
Go
package middleware
|
|
|
|
import (
|
|
"net/http"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/labstack/echo/v4"
|
|
)
|
|
|
|
// RateLimiterConfig defines rate limiting configuration
|
|
type RateLimiterConfig struct {
|
|
RequestsPerMinute int
|
|
CleanupInterval time.Duration
|
|
}
|
|
|
|
// DefaultRateLimiterConfig returns sensible defaults
|
|
func DefaultRateLimiterConfig() RateLimiterConfig {
|
|
return RateLimiterConfig{
|
|
RequestsPerMinute: 10,
|
|
CleanupInterval: 5 * time.Minute,
|
|
}
|
|
}
|
|
|
|
// RateLimiter tracks request counts per IP
|
|
type RateLimiter struct {
|
|
mu sync.RWMutex
|
|
requests map[string][]time.Time
|
|
config RateLimiterConfig
|
|
}
|
|
|
|
// NewRateLimiter creates a new rate limiter
|
|
func NewRateLimiter(config RateLimiterConfig) *RateLimiter {
|
|
rl := &RateLimiter{
|
|
requests: make(map[string][]time.Time),
|
|
config: config,
|
|
}
|
|
|
|
// Start cleanup goroutine
|
|
go rl.cleanup()
|
|
|
|
return rl
|
|
}
|
|
|
|
// cleanup removes old request records
|
|
func (rl *RateLimiter) cleanup() {
|
|
ticker := time.NewTicker(rl.config.CleanupInterval)
|
|
defer ticker.Stop()
|
|
|
|
for range ticker.C {
|
|
rl.mu.Lock()
|
|
now := time.Now()
|
|
for ip, requests := range rl.requests {
|
|
// Remove requests older than 1 minute
|
|
var valid []time.Time
|
|
for _, reqTime := range requests {
|
|
if now.Sub(reqTime) < time.Minute {
|
|
valid = append(valid, reqTime)
|
|
}
|
|
}
|
|
if len(valid) == 0 {
|
|
delete(rl.requests, ip)
|
|
} else {
|
|
rl.requests[ip] = valid
|
|
}
|
|
}
|
|
rl.mu.Unlock()
|
|
}
|
|
}
|
|
|
|
// Allow checks if a request from the given IP should be allowed
|
|
func (rl *RateLimiter) Allow(ip string) bool {
|
|
rl.mu.Lock()
|
|
defer rl.mu.Unlock()
|
|
|
|
now := time.Now()
|
|
|
|
// Clean old requests for this IP
|
|
var valid []time.Time
|
|
for _, reqTime := range rl.requests[ip] {
|
|
if now.Sub(reqTime) < time.Minute {
|
|
valid = append(valid, reqTime)
|
|
}
|
|
}
|
|
rl.requests[ip] = valid
|
|
|
|
// Check if limit exceeded
|
|
if len(rl.requests[ip]) >= rl.config.RequestsPerMinute {
|
|
return false
|
|
}
|
|
|
|
// Add this request
|
|
rl.requests[ip] = append(rl.requests[ip], now)
|
|
return true
|
|
}
|
|
|
|
// RateLimiterMiddleware returns echo middleware for rate limiting
|
|
func RateLimiterMiddleware(rl *RateLimiter) echo.MiddlewareFunc {
|
|
return func(next echo.HandlerFunc) echo.HandlerFunc {
|
|
return func(c echo.Context) error {
|
|
// Get client IP
|
|
ip := c.RealIP()
|
|
if ip == "" {
|
|
ip = c.Request().RemoteAddr
|
|
}
|
|
|
|
if !rl.Allow(ip) {
|
|
return c.JSON(http.StatusTooManyRequests, map[string]string{
|
|
"error": "too many requests, please try again later",
|
|
})
|
|
}
|
|
|
|
return next(c)
|
|
}
|
|
}
|
|
}
|