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// Copyright (C) 2019-2023 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package middlewares_test
import (
"errors"
"net/http"
"net/http/httptest"
"testing"
"github.com/labstack/echo/v4"
"github.com/stretchr/testify/assert"
"github.com/algorand/go-algorand/daemon/algod/api/server/lib/middlewares"
"github.com/algorand/go-algorand/test/partitiontest"
)
func TestConnectionLimiterBasic(t *testing.T) {
partitiontest.PartitionTest(t)
e := echo.New()
handlerCh := make(chan struct{})
limit := 5
handler := func(c echo.Context) error {
<-handlerCh
return c.String(http.StatusOK, "test")
}
middleware := middlewares.MakeConnectionLimiter(uint64(limit))
numConnections := 13
for i := 0; i < 3; i++ {
var recorders []*httptest.ResponseRecorder
doneCh := make(chan int)
errCh := make(chan error)
for index := 0; index < numConnections; index++ {
req := httptest.NewRequest(http.MethodGet, "/", nil)
rec := httptest.NewRecorder()
ctx := e.NewContext(req, rec)
recorders = append(recorders, rec)
go func(index int) {
err := middleware(handler)(ctx)
doneCh <- index
errCh <- err
}(index)
}
// Check http 429 code.
for j := 0; j < numConnections-limit; j++ {
index := <-doneCh
assert.Equal(t, http.StatusTooManyRequests, recorders[index].Code)
}
// Let handlers finish.
for j := 0; j < limit; j++ {
handlerCh <- struct{}{}
}
// All other connections must return 200.
for j := 0; j < limit; j++ {
index := <-doneCh
assert.Equal(t, http.StatusOK, recorders[index].Code)
}
// Check that no errors were returned by the middleware.
for i := 0; i < numConnections; i++ {
assert.NoError(t, <-errCh)
}
}
}
func TestConnectionLimiterForwardsError(t *testing.T) {
partitiontest.PartitionTest(t)
handlerError := errors.New("handler error")
handler := func(c echo.Context) error {
return handlerError
}
middleware := middlewares.MakeConnectionLimiter(1)
err := middleware(handler)(nil)
assert.ErrorIs(t, err, handlerError)
}
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