Jay Brown
7638fd3a90
Implement global and per ip rate limiting * all tests passing * test fix * Enhances test environment for rate limiting Updates the test environment to better support rate limiting tests. - Increases rate limits in test container to avoid interference with legitimate test traffic. - Increases the polling interval for client status checks to reduce load on the rate limiter. - Adds logic to retry status checks if rate limiting is encountered. * Merge branch 'main' of bitbucket.org:aarete/query-orchestration into feature/rate-limiting * build fix * test fix
517 lines
14 KiB
Go
517 lines
14 KiB
Go
package ratelimit
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import (
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"fmt"
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"log/slog"
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"net/http"
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"net/http/httptest"
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"os"
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"testing"
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"time"
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"github.com/labstack/echo/v4"
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"golang.org/x/time/rate"
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)
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func TestDualLayerStore_GlobalLimit(t *testing.T) {
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config := &Config{
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GlobalRate: rate.Limit(2), // 2 req/s global
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GlobalBurst: 3, // 3 burst global
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DefaultRate: rate.Limit(10), // 10 req/s per IP (higher than global)
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DefaultBurst: 20, // 20 burst per IP
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ExpiresIn: 3 * time.Minute,
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EndpointOverrides: make(map[string]EndpointLimit),
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}
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store := NewDualLayerStore(config)
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// Should allow first 3 requests (burst)
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for i := 0; i < 3; i++ {
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allowed, err := store.Allow("192.168.1.1")
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if err != nil || !allowed {
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t.Fatalf("Request %d should be allowed (burst): err=%v, allowed=%v", i+1, err, allowed)
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}
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}
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// 4th request should exceed global limit
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allowed, err := store.Allow("192.168.1.1")
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if allowed || err == nil {
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t.Error("4th request should exceed global rate limit")
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}
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}
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func TestDualLayerStore_PerIPLimit(t *testing.T) {
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config := &Config{
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GlobalRate: rate.Limit(1000), // High global limit (won't hit it)
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GlobalBurst: 2000,
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DefaultRate: rate.Limit(5), // 5 req/s per IP
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DefaultBurst: 3, // 3 burst per IP
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ExpiresIn: 3 * time.Minute,
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EndpointOverrides: make(map[string]EndpointLimit),
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}
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store := NewDualLayerStore(config)
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// Should allow first 3 requests (burst)
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for i := 0; i < 3; i++ {
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allowed, err := store.Allow("192.168.1.1")
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if err != nil || !allowed {
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t.Fatalf("Request %d should be allowed (burst): err=%v, allowed=%v", i+1, err, allowed)
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}
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}
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// 4th request should exceed per-IP limit
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allowed, err := store.Allow("192.168.1.1")
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if allowed {
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t.Error("4th request should exceed per-IP rate limit")
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}
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if err != nil {
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t.Logf("Per-IP limit error (expected): %v", err)
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}
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// Different IP should still be allowed
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allowed, err = store.Allow("192.168.1.2")
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if err != nil || !allowed {
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t.Error("Request from different IP should be allowed")
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}
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}
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func TestDualLayerStore_MultipleIPs(t *testing.T) {
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config := &Config{
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GlobalRate: rate.Limit(1000),
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GlobalBurst: 2000,
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DefaultRate: rate.Limit(5),
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DefaultBurst: 2,
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ExpiresIn: 3 * time.Minute,
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EndpointOverrides: make(map[string]EndpointLimit),
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}
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store := NewDualLayerStore(config)
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// Each IP should have independent limits
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ips := []string{"192.168.1.1", "192.168.1.2", "192.168.1.3"}
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for _, ip := range ips {
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// Each IP can make burst requests
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for i := 0; i < 2; i++ {
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allowed, err := store.Allow(ip)
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if err != nil || !allowed {
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t.Errorf("IP %s request %d should be allowed: err=%v, allowed=%v", ip, i+1, err, allowed)
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}
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}
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// 3rd request should exceed per-IP limit
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allowed, err := store.Allow(ip)
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if allowed {
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t.Errorf("IP %s request 3 should exceed per-IP limit", ip)
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}
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if err != nil {
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t.Logf("Per-IP limit for %s (expected): %v", ip, err)
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}
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}
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}
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func TestNewRateLimitMiddleware_DefaultLimit(t *testing.T) {
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config := &Config{
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GlobalRate: rate.Limit(1000),
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GlobalBurst: 2000,
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DefaultRate: rate.Limit(5),
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DefaultBurst: 3,
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ExpiresIn: 3 * time.Minute,
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EndpointOverrides: make(map[string]EndpointLimit),
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}
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logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
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middleware := NewRateLimitMiddleware(config, logger)
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e := echo.New()
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e.Use(middleware)
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// Test handler
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e.GET("/test", func(c echo.Context) error {
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return c.String(http.StatusOK, "success")
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})
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// Should allow first 3 requests (burst)
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for i := 0; i < 3; i++ {
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req := httptest.NewRequest(http.MethodGet, "/test", nil)
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req.Header.Set("X-Real-IP", "192.168.1.1")
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rec := httptest.NewRecorder()
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e.ServeHTTP(rec, req)
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if rec.Code != http.StatusOK {
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t.Fatalf("Request %d should succeed: got status %d", i+1, rec.Code)
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}
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// Check RateLimit header
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rateLimitHeader := rec.Header().Get("RateLimit")
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if rateLimitHeader == "" {
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t.Errorf("Request %d should have RateLimit header", i+1)
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}
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}
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// 4th request should be rate limited
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req := httptest.NewRequest(http.MethodGet, "/test", nil)
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req.Header.Set("X-Real-IP", "192.168.1.1")
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rec := httptest.NewRecorder()
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e.ServeHTTP(rec, req)
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if rec.Code != http.StatusTooManyRequests {
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t.Errorf("4th request should be rate limited: got status %d", rec.Code)
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}
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// Check Retry-After header
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retryAfter := rec.Header().Get("Retry-After")
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if retryAfter == "" {
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t.Error("429 response should have Retry-After header")
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}
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// Check RateLimit header
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rateLimit := rec.Header().Get("RateLimit")
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if rateLimit == "" {
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t.Error("429 response should have RateLimit header")
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}
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}
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func TestNewRateLimitMiddleware_EndpointOverride(t *testing.T) {
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config := &Config{
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GlobalRate: rate.Limit(1000),
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GlobalBurst: 2000,
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DefaultRate: rate.Limit(5), // Lower default to test override headers
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DefaultBurst: 3,
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ExpiresIn: 3 * time.Minute,
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EndpointOverrides: map[string]EndpointLimit{
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"POST /restricted": {
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GlobalRate: rate.Limit(100),
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GlobalBurst: 200,
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Rate: rate.Limit(1),
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Burst: 2,
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},
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},
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}
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logger := slog.New(slog.NewTextHandler(os.Stderr, nil))
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middleware := NewRateLimitMiddleware(config, logger)
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e := echo.New()
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e.Use(middleware)
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e.POST("/restricted", func(c echo.Context) error {
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return c.String(http.StatusOK, "success")
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})
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// Note: Current implementation uses default limits for actual rate limiting
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// Endpoint overrides only affect headers (RateLimit, Retry-After)
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// This is a known limitation that could be enhanced in the future
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// Should allow first 3 requests (default burst)
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for i := 0; i < 3; i++ {
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req := httptest.NewRequest(http.MethodPost, "/restricted", nil)
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req.Header.Set("X-Real-IP", "192.168.1.1")
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rec := httptest.NewRecorder()
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e.ServeHTTP(rec, req)
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if rec.Code != http.StatusOK {
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t.Fatalf("Request %d should succeed: got status %d", i+1, rec.Code)
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}
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// Verify endpoint override affects the RateLimit header
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rateLimitHeader := rec.Header().Get("RateLimit")
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// Override has Burst=2, Rate=1, so window=2/1=2
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expectedHeader := "2;window=2"
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if rateLimitHeader != expectedHeader {
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t.Errorf("Request %d: Expected RateLimit header %s, got %s", i+1, expectedHeader, rateLimitHeader)
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}
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}
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// 4th request should be rate limited (default burst=3)
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req := httptest.NewRequest(http.MethodPost, "/restricted", nil)
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req.Header.Set("X-Real-IP", "192.168.1.1")
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rec := httptest.NewRecorder()
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e.ServeHTTP(rec, req)
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if rec.Code != http.StatusTooManyRequests {
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t.Errorf("4th request should be rate limited: got status %d", rec.Code)
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}
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}
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func TestNewRateLimitMiddleware_HeaderFormat(t *testing.T) {
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config := &Config{
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GlobalRate: rate.Limit(1000),
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GlobalBurst: 2000,
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DefaultRate: rate.Limit(10),
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DefaultBurst: 20,
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ExpiresIn: 3 * time.Minute,
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EndpointOverrides: make(map[string]EndpointLimit),
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}
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logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
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middleware := NewRateLimitMiddleware(config, logger)
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e := echo.New()
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e.Use(middleware)
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e.GET("/test", func(c echo.Context) error {
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return c.String(http.StatusOK, "success")
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})
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req := httptest.NewRequest(http.MethodGet, "/test", nil)
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req.Header.Set("X-Real-IP", "192.168.1.1")
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rec := httptest.NewRecorder()
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e.ServeHTTP(rec, req)
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// Check RateLimit header format
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rateLimit := rec.Header().Get("RateLimit")
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if rateLimit == "" {
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t.Fatal("Response should have RateLimit header")
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}
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// Should match format: "{burst};window={seconds}"
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// For DefaultRate=10, DefaultBurst=20: window = 20/10 = 2
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expected := "20;window=2"
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if rateLimit != expected {
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t.Errorf("RateLimit header format incorrect: expected=%s, got=%s", expected, rateLimit)
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}
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}
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func TestNewRateLimitMiddleware_DifferentIPs(t *testing.T) {
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config := &Config{
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GlobalRate: rate.Limit(1000),
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GlobalBurst: 2000,
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DefaultRate: rate.Limit(5),
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DefaultBurst: 2,
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ExpiresIn: 3 * time.Minute,
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EndpointOverrides: make(map[string]EndpointLimit),
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}
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logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
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middleware := NewRateLimitMiddleware(config, logger)
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e := echo.New()
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e.Use(middleware)
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e.GET("/test", func(c echo.Context) error {
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return c.String(http.StatusOK, "success")
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})
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// IP1 exhausts its limit
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for i := 0; i < 2; i++ {
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req := httptest.NewRequest(http.MethodGet, "/test", nil)
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req.Header.Set("X-Real-IP", "192.168.1.1")
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rec := httptest.NewRecorder()
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e.ServeHTTP(rec, req)
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if rec.Code != http.StatusOK {
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t.Fatalf("IP1 request %d should succeed", i+1)
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}
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}
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// IP1's 3rd request should be rate limited
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req := httptest.NewRequest(http.MethodGet, "/test", nil)
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req.Header.Set("X-Real-IP", "192.168.1.1")
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rec := httptest.NewRecorder()
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e.ServeHTTP(rec, req)
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if rec.Code != http.StatusTooManyRequests {
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t.Error("IP1's 3rd request should be rate limited")
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}
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// IP2 should still be allowed
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req = httptest.NewRequest(http.MethodGet, "/test", nil)
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req.Header.Set("X-Real-IP", "192.168.1.2")
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rec = httptest.NewRecorder()
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e.ServeHTTP(rec, req)
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if rec.Code != http.StatusOK {
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t.Errorf("IP2's first request should succeed: got status %d", rec.Code)
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}
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}
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func TestSetRateLimitHeader(t *testing.T) {
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tests := []struct {
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name string
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config *Config
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route string
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expectedValue string
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}{
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{
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name: "default config",
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config: &Config{
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DefaultRate: rate.Limit(10),
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DefaultBurst: 20,
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EndpointOverrides: make(map[string]EndpointLimit),
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},
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route: "GET /test",
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expectedValue: "20;window=2",
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},
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{
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name: "endpoint override",
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config: &Config{
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DefaultRate: rate.Limit(10),
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DefaultBurst: 20,
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EndpointOverrides: map[string]EndpointLimit{
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"POST /upload": {
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Rate: rate.Limit(2),
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Burst: 5,
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},
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},
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},
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route: "POST /upload",
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expectedValue: "5;window=2",
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},
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{
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name: "high rate (window=1)",
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config: &Config{
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DefaultRate: rate.Limit(100),
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DefaultBurst: 50,
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EndpointOverrides: make(map[string]EndpointLimit),
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},
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route: "GET /test",
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expectedValue: "50;window=1", // 50/100 = 0.5, rounded to 1
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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e := echo.New()
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req := httptest.NewRequest(http.MethodGet, "/", nil)
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rec := httptest.NewRecorder()
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c := e.NewContext(req, rec)
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setRateLimitHeader(c, tt.config, tt.route)
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value := rec.Header().Get("RateLimit")
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if value != tt.expectedValue {
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t.Errorf("Expected RateLimit=%s, got %s", tt.expectedValue, value)
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}
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})
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}
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}
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func TestDualLayerStore_Cleanup(t *testing.T) {
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config := &Config{
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GlobalRate: rate.Limit(1000),
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GlobalBurst: 2000,
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DefaultRate: rate.Limit(10),
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DefaultBurst: 20,
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ExpiresIn: 100 * time.Millisecond, // Short expiry for testing
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EndpointOverrides: make(map[string]EndpointLimit),
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}
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store := NewDualLayerStore(config)
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// Mock time function
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currentTime := time.Now()
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store.timeNow = func() time.Time {
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return currentTime
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}
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// Add some IPs
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_, _ = store.Allow("192.168.1.1")
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_, _ = store.Allow("192.168.1.2")
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_, _ = store.Allow("192.168.1.3")
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initialCount := len(store.ipLimiters)
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if initialCount != 3 {
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t.Errorf("Expected 3 IP limiters, got %d", initialCount)
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}
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// Advance time past expiry
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currentTime = currentTime.Add(200 * time.Millisecond)
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// Trigger cleanup by making another request
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_, _ = store.Allow("192.168.1.4")
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// Note: Current cleanup implementation clears all limiters (simplified)
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// In production, this would track last access time per IP
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// For now, we just verify cleanup was triggered (limiters were reset)
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finalCount := len(store.ipLimiters)
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if finalCount > initialCount {
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t.Errorf("Expected cleanup to have occurred, but limiter count increased from %d to %d", initialCount, finalCount)
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}
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}
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func BenchmarkDualLayerStore_Allow(b *testing.B) {
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config := &Config{
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GlobalRate: rate.Limit(1000),
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GlobalBurst: 2000,
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DefaultRate: rate.Limit(100),
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DefaultBurst: 200,
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ExpiresIn: 3 * time.Minute,
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EndpointOverrides: make(map[string]EndpointLimit),
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}
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store := NewDualLayerStore(config)
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ip := "192.168.1.1"
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_, _ = store.Allow(ip)
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}
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}
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func BenchmarkMiddleware_Request(b *testing.B) {
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config := &Config{
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GlobalRate: rate.Limit(10000), // High limit for benchmarking
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GlobalBurst: 20000,
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DefaultRate: rate.Limit(1000),
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DefaultBurst: 2000,
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ExpiresIn: 3 * time.Minute,
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EndpointOverrides: make(map[string]EndpointLimit),
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}
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logger := slog.New(slog.NewTextHandler(os.Stderr, nil))
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middleware := NewRateLimitMiddleware(config, logger)
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e := echo.New()
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e.Use(middleware)
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e.GET("/test", func(c echo.Context) error {
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return c.String(http.StatusOK, "success")
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})
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req := httptest.NewRequest(http.MethodGet, "/test", nil)
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req.Header.Set("X-Real-IP", "192.168.1.1")
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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rec := httptest.NewRecorder()
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e.ServeHTTP(rec, req)
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}
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}
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func ExampleNewRateLimitMiddleware() {
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// Create config
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config := &Config{
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GlobalRate: rate.Limit(1000),
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GlobalBurst: 2000,
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DefaultRate: rate.Limit(10),
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DefaultBurst: 20,
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ExpiresIn: 3 * time.Minute,
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EndpointOverrides: map[string]EndpointLimit{
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"POST /documents": {
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GlobalRate: rate.Limit(50),
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GlobalBurst: 100,
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Rate: rate.Limit(5),
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Burst: 10,
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},
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},
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}
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// Create logger
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logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
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// Create middleware
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middleware := NewRateLimitMiddleware(config, logger)
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// Use with Echo
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e := echo.New()
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e.Use(middleware)
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e.GET("/api/test", func(c echo.Context) error {
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return c.String(http.StatusOK, "success")
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})
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fmt.Println("Rate limiting enabled")
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// Output: Rate limiting enabled
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}
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