mirror of
https://github.com/prometheus/statsd_exporter.git
synced 2024-11-26 09:11:01 +00:00
07543ac557
* add TCP StatsD listener support * add listen-tcp flag to control UDP/TCP mode on same port * statsdListenUDP/statsdListenTCP as string, and alias listen-address to listen-udp * add stats for tcp error/line_too_long * add test for TCP listener
112 lines
3 KiB
Go
112 lines
3 KiB
Go
// Copyright 2013 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"fmt"
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"net"
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"testing"
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"time"
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)
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// TestNegativeCounter validates when we send a negative
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// number to a counter that we no longer panic the Exporter Listener.
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func TestNegativeCounter(t *testing.T) {
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defer func() {
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if e := recover(); e != nil {
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err := e.(error)
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if err.Error() == "counter cannot decrease in value" {
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t.Fatalf("Counter was negative and causes a panic.")
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} else {
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t.Fatalf("Unknown panic and error: %q", err.Error())
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}
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}
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}()
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events := make(chan Events, 1)
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c := Events{
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&CounterEvent{
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metricName: "foo",
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value: -1,
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},
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}
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events <- c
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ex := NewExporter(&metricMapper{}, true)
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// Close channel to signify we are done with the listener after a short period.
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go func() {
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time.Sleep(time.Millisecond * 100)
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close(events)
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}()
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ex.Listen(events)
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}
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// TestInvalidUtf8InDatadogTagValue validates robustness of exporter listener
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// against datadog tags with invalid tag values.
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// It sends the same tags first with a valid value, then with an invalid one.
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// The exporter should not panic, but drop the invalid event
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func TestInvalidUtf8InDatadogTagValue(t *testing.T) {
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ex := NewExporter(&metricMapper{}, true)
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for _, l := range []statsDPacketHandler{&StatsDUDPListener{}, &mockStatsDTCPListener{}} {
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events := make(chan Events, 2)
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l.handlePacket([]byte("bar:200|c|#tag:value\nbar:200|c|#tag:\xc3\x28invalid"), events)
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// Close channel to signify we are done with the listener after a short period.
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go func() {
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time.Sleep(time.Millisecond * 100)
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close(events)
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}()
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ex.Listen(events)
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}
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}
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type statsDPacketHandler interface {
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handlePacket(packet []byte, e chan<- Events)
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}
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type mockStatsDTCPListener struct {
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StatsDTCPListener
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}
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func (ml *mockStatsDTCPListener) handlePacket(packet []byte, e chan<- Events) {
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lc, err := net.ListenTCP("tcp", nil)
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if err != nil {
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panic(fmt.Sprintf("mockStatsDTCPListener: listen failed: %v", err))
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}
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defer lc.Close()
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go func() {
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cc, err := net.DialTCP("tcp", nil, lc.Addr().(*net.TCPAddr))
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if err != nil {
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panic(fmt.Sprintf("mockStatsDTCPListener: dial failed: %v", err))
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}
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defer cc.Close()
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n, err := cc.Write(packet)
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if err != nil || n != len(packet) {
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panic(fmt.Sprintf("mockStatsDTCPListener: write failed: %v,%d", err, n))
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}
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}()
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sc, err := lc.AcceptTCP()
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if err != nil {
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panic(fmt.Sprintf("mockStatsDTCPListener: accept failed: %v", err))
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}
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ml.handleConn(sc, e)
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}
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