removed unnecessary pointer indirection, added rate limiter middleware

internal/net/http/middleware/rate_limit_test.go

@@ -0,0 +1,27 @@
+package middleware
+
+import (
+	"net/http"
+	"testing"
+
+	. "github.com/yusing/go-proxy/internal/utils/testing"
+)
+
+func TestRateLimit(t *testing.T) {
+	opts := OptionsRaw{
+		"average": "10",
+		"burst":   "10",
+		"period":  "1s",
+	}
+
+	rl, err := NewRateLimiter(opts)
+	ExpectNoError(t, err)
+	for range 10 {
+		result, err := newMiddlewareTest(rl, nil)
+		ExpectNoError(t, err)
+		ExpectEqual(t, result.ResponseStatus, http.StatusOK)
+	}
+	result, err := newMiddlewareTest(rl, nil)
+	ExpectNoError(t, err)
+	ExpectEqual(t, result.ResponseStatus, http.StatusTooManyRequests)
+}