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// Copyright 2012-2018 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package nats
////////////////////////////////////////////////////////////////////////////////
// Package scoped specific tests here..
////////////////////////////////////////////////////////////////////////////////
import (
"bufio"
"bytes"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net"
"os"
"reflect"
"runtime"
"strings"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/nats-io/gnatsd/server"
gnatsd "github.com/nats-io/gnatsd/test"
"github.com/nats-io/nkeys"
)
// Dumb wait program to sync on callbacks, etc... Will timeout
func Wait(ch chan bool) error {
return WaitTime(ch, 5*time.Second)
}
func WaitTime(ch chan bool, timeout time.Duration) error {
select {
case <-ch:
return nil
case <-time.After(timeout):
}
return errors.New("timeout")
}
func stackFatalf(t *testing.T, f string, args ...interface{}) {
lines := make([]string, 0, 32)
msg := fmt.Sprintf(f, args...)
lines = append(lines, msg)
// Generate the Stack of callers: Skip us and verify* frames.
for i := 1; true; i++ {
_, file, line, ok := runtime.Caller(i)
if !ok {
break
}
msg := fmt.Sprintf("%d - %s:%d", i, file, line)
lines = append(lines, msg)
}
t.Fatalf("%s", strings.Join(lines, "\n"))
}
func TestVersionMatchesTag(t *testing.T) {
tag := os.Getenv("TRAVIS_TAG")
if tag == "" {
t.SkipNow()
}
// We expect a tag of the form vX.Y.Z. If that's not the case,
// we need someone to have a look. So fail if first letter is not
// a `v`
if tag[0] != 'v' {
t.Fatalf("Expect tag to start with `v`, tag is: %s", tag)
}
// Strip the `v` from the tag for the version comparison.
if Version != tag[1:] {
t.Fatalf("Version (%s) does not match tag (%s)", Version, tag[1:])
}
}
////////////////////////////////////////////////////////////////////////////////
// Reconnect tests
////////////////////////////////////////////////////////////////////////////////
const TEST_PORT = 8368
var reconnectOpts = Options{
Url: fmt.Sprintf("nats://localhost:%d", TEST_PORT),
AllowReconnect: true,
MaxReconnect: 10,
ReconnectWait: 100 * time.Millisecond,
Timeout: DefaultTimeout,
}
func RunServerOnPort(port int) *server.Server {
opts := gnatsd.DefaultTestOptions
opts.Port = port
return RunServerWithOptions(opts)
}
func RunServerWithOptions(opts server.Options) *server.Server {
return gnatsd.RunServer(&opts)
}
func TestReconnectServerStats(t *testing.T) {
ts := RunServerOnPort(TEST_PORT)
opts := reconnectOpts
nc, _ := opts.Connect()
defer nc.Close()
nc.Flush()
ts.Shutdown()
// server is stopped here...
ts = RunServerOnPort(TEST_PORT)
defer ts.Shutdown()
if err := nc.FlushTimeout(5 * time.Second); err != nil {
t.Fatalf("Error on Flush: %v", err)
}
// Make sure the server who is reconnected has the reconnects stats reset.
nc.mu.Lock()
_, cur := nc.currentServer()
nc.mu.Unlock()
if cur.reconnects != 0 {
t.Fatalf("Current Server's reconnects should be 0 vs %d\n", cur.reconnects)
}
}
func TestParseStateReconnectFunctionality(t *testing.T) {
ts := RunServerOnPort(TEST_PORT)
ch := make(chan bool)
opts := reconnectOpts
dch := make(chan bool)
opts.DisconnectedCB = func(_ *Conn) {
dch <- true
}
nc, errc := opts.Connect()
if errc != nil {
t.Fatalf("Failed to create a connection: %v\n", errc)
}
ec, errec := NewEncodedConn(nc, DEFAULT_ENCODER)
if errec != nil {
nc.Close()
t.Fatalf("Failed to create an encoded connection: %v\n", errec)
}
defer ec.Close()
testString := "bar"
ec.Subscribe("foo", func(s string) {
if s != testString {
t.Fatal("String doesn't match")
}
ch <- true
})
ec.Flush()
// Got a RACE condition with Travis build. The locking below does not
// really help because the parser running in the readLoop accesses
// nc.ps without the connection lock. Sleeping may help better since
// it would make the memory write in parse.go (when processing the
// pong) further away from the modification below.
time.Sleep(1 * time.Second)
// Simulate partialState, this needs to be cleared
nc.mu.Lock()
nc.ps.state = OP_PON
nc.mu.Unlock()
ts.Shutdown()
// server is stopped here...
if err := Wait(dch); err != nil {
t.Fatal("Did not get the DisconnectedCB")
}
if err := ec.Publish("foo", testString); err != nil {
t.Fatalf("Failed to publish message: %v\n", err)
}
ts = RunServerOnPort(TEST_PORT)
defer ts.Shutdown()
if err := ec.FlushTimeout(5 * time.Second); err != nil {
t.Fatalf("Error on Flush: %v", err)
}
if err := Wait(ch); err != nil {
t.Fatal("Did not receive our message")
}
expectedReconnectCount := uint64(1)
reconnectedCount := ec.Conn.Stats().Reconnects
if reconnectedCount != expectedReconnectCount {
t.Fatalf("Reconnect count incorrect: %d vs %d\n",
reconnectedCount, expectedReconnectCount)
}
}
////////////////////////////////////////////////////////////////////////////////
// ServerPool tests
////////////////////////////////////////////////////////////////////////////////
var testServers = []string{
"nats://localhost:1222",
"nats://localhost:1223",
"nats://localhost:1224",
"nats://localhost:1225",
"nats://localhost:1226",
"nats://localhost:1227",
"nats://localhost:1228",
}
func TestSimplifiedURLs(t *testing.T) {
opts := GetDefaultOptions()
opts.NoRandomize = true
opts.Servers = []string{
"nats://host1:1234",
"nats://host2:",
"nats://host3",
"host4:1234",
"host5:",
"host6",
"nats://[1:2:3:4]:1234",
"nats://[5:6:7:8]:",
"nats://[9:10:11:12]",
"[13:14:15:16]:",
"[17:18:19:20]:1234",
}
// We expect the result in the server pool to be:
expected := []string{
"nats://host1:1234",
"nats://host2:4222",
"nats://host3:4222",
"nats://host4:1234",
"nats://host5:4222",
"nats://host6:4222",
"nats://[1:2:3:4]:1234",
"nats://[5:6:7:8]:4222",
"nats://[9:10:11:12]:4222",
"nats://[13:14:15:16]:4222",
"nats://[17:18:19:20]:1234",
}
nc := &Conn{Opts: opts}
if err := nc.setupServerPool(); err != nil {
t.Fatalf("Problem setting up Server Pool: %v\n", err)
}
// Check server pool directly
for i, u := range nc.srvPool {
if u.url.String() != expected[i] {
t.Fatalf("Expected url %q, got %q", expected[i], u.url.String())
}
}
}
func TestServersRandomize(t *testing.T) {
opts := GetDefaultOptions()
opts.Servers = testServers
nc := &Conn{Opts: opts}
if err := nc.setupServerPool(); err != nil {
t.Fatalf("Problem setting up Server Pool: %v\n", err)
}
// Build []string from srvPool
clientServers := []string{}
for _, s := range nc.srvPool {
clientServers = append(clientServers, s.url.String())
}
// In theory this could happen..
if reflect.DeepEqual(testServers, clientServers) {
t.Fatalf("ServerPool list not randomized\n")
}
// Now test that we do not randomize if proper flag is set.
opts = GetDefaultOptions()
opts.Servers = testServers
opts.NoRandomize = true
nc = &Conn{Opts: opts}
if err := nc.setupServerPool(); err != nil {
t.Fatalf("Problem setting up Server Pool: %v\n", err)
}
// Build []string from srvPool
clientServers = []string{}
for _, s := range nc.srvPool {
clientServers = append(clientServers, s.url.String())
}
if !reflect.DeepEqual(testServers, clientServers) {
t.Fatalf("ServerPool list should not be randomized\n")
}
// Although the original intent was that if Opts.Url is
// set, Opts.Servers is not (and vice versa), the behavior
// is that Opts.Url is always first, even when randomization
// is enabled. So make sure that this is still the case.
opts = GetDefaultOptions()
opts.Url = DefaultURL
opts.Servers = testServers
nc = &Conn{Opts: opts}
if err := nc.setupServerPool(); err != nil {
t.Fatalf("Problem setting up Server Pool: %v\n", err)
}
// Build []string from srvPool
clientServers = []string{}
for _, s := range nc.srvPool {
clientServers = append(clientServers, s.url.String())
}
// In theory this could happen..
if reflect.DeepEqual(testServers, clientServers) {
t.Fatalf("ServerPool list not randomized\n")
}
if clientServers[0] != DefaultURL {
t.Fatalf("Options.Url should be first in the array, got %v", clientServers[0])
}
}
func TestSelectNextServer(t *testing.T) {
opts := GetDefaultOptions()
opts.Servers = testServers
opts.NoRandomize = true
nc := &Conn{Opts: opts}
if err := nc.setupServerPool(); err != nil {
t.Fatalf("Problem setting up Server Pool: %v\n", err)
}
if nc.url != nc.srvPool[0].url {
t.Fatalf("Wrong default selection: %v\n", nc.url)
}
sel, err := nc.selectNextServer()
if err != nil {
t.Fatalf("Got an err: %v\n", err)
}
// Check that we are now looking at #2, and current is now last.
if len(nc.srvPool) != len(testServers) {
t.Fatalf("List is incorrect size: %d vs %d\n", len(nc.srvPool), len(testServers))
}
if nc.url.String() != testServers[1] {
t.Fatalf("Selection incorrect: %v vs %v\n", nc.url, testServers[1])
}
if nc.srvPool[len(nc.srvPool)-1].url.String() != testServers[0] {
t.Fatalf("Did not push old to last position\n")
}
if sel != nc.srvPool[0] {
t.Fatalf("Did not return correct server: %v vs %v\n", sel.url, nc.srvPool[0].url)
}
// Test that we do not keep servers where we have tried to reconnect past our limit.
nc.srvPool[0].reconnects = int(opts.MaxReconnect)
if _, err := nc.selectNextServer(); err != nil {
t.Fatalf("Got an err: %v\n", err)
}
// Check that we are now looking at #3, and current is not in the list.
if len(nc.srvPool) != len(testServers)-1 {
t.Fatalf("List is incorrect size: %d vs %d\n", len(nc.srvPool), len(testServers)-1)
}
if nc.url.String() != testServers[2] {
t.Fatalf("Selection incorrect: %v vs %v\n", nc.url, testServers[2])
}
if nc.srvPool[len(nc.srvPool)-1].url.String() == testServers[1] {
t.Fatalf("Did not throw away the last server correctly\n")
}
}
// This will test that comma separated url strings work properly for
// the Connect() command.
func TestUrlArgument(t *testing.T) {
check := func(url string, expected []string) {
if !reflect.DeepEqual(processUrlString(url), expected) {
t.Fatalf("Got wrong response processing URL: %q, RES: %#v\n", url, processUrlString(url))
}
}
// This is normal case
oneExpected := []string{"nats://localhost:1222"}
check("nats://localhost:1222", oneExpected)
check("nats://localhost:1222 ", oneExpected)
check(" nats://localhost:1222", oneExpected)
check(" nats://localhost:1222 ", oneExpected)
var multiExpected = []string{
"nats://localhost:1222",
"nats://localhost:1223",
"nats://localhost:1224",
}
check("nats://localhost:1222,nats://localhost:1223,nats://localhost:1224", multiExpected)
check("nats://localhost:1222, nats://localhost:1223, nats://localhost:1224", multiExpected)
check(" nats://localhost:1222, nats://localhost:1223, nats://localhost:1224 ", multiExpected)
check("nats://localhost:1222, nats://localhost:1223 ,nats://localhost:1224", multiExpected)
}
func TestParserPing(t *testing.T) {
c := &Conn{}
fake := &bytes.Buffer{}
c.bw = bufio.NewWriterSize(fake, c.Opts.ReconnectBufSize)
c.ps = &parseState{}
if c.ps.state != OP_START {
t.Fatalf("Expected OP_START vs %d\n", c.ps.state)
}
ping := []byte("PING\r\n")
err := c.parse(ping[:1])
if err != nil || c.ps.state != OP_P {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(ping[1:2])
if err != nil || c.ps.state != OP_PI {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(ping[2:3])
if err != nil || c.ps.state != OP_PIN {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(ping[3:4])
if err != nil || c.ps.state != OP_PING {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(ping[4:5])
if err != nil || c.ps.state != OP_PING {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(ping[5:6])
if err != nil || c.ps.state != OP_START {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(ping)
if err != nil || c.ps.state != OP_START {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
// Should tolerate spaces
ping = []byte("PING \r")
err = c.parse(ping)
if err != nil || c.ps.state != OP_PING {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
c.ps.state = OP_START
ping = []byte("PING \r \n")
err = c.parse(ping)
if err != nil || c.ps.state != OP_START {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
}
func TestParserErr(t *testing.T) {
c := &Conn{}
c.status = CLOSED
fake := &bytes.Buffer{}
c.bw = bufio.NewWriterSize(fake, c.Opts.ReconnectBufSize)
c.ps = &parseState{}
// This test focuses on the parser only, not how the error is
// actually processed by the upper layer.
if c.ps.state != OP_START {
t.Fatalf("Expected OP_START vs %d\n", c.ps.state)
}
expectedError := "'Any kind of error'"
errProto := []byte("-ERR " + expectedError + "\r\n")
err := c.parse(errProto[:1])
if err != nil || c.ps.state != OP_MINUS {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(errProto[1:2])
if err != nil || c.ps.state != OP_MINUS_E {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(errProto[2:3])
if err != nil || c.ps.state != OP_MINUS_ER {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(errProto[3:4])
if err != nil || c.ps.state != OP_MINUS_ERR {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(errProto[4:5])
if err != nil || c.ps.state != OP_MINUS_ERR_SPC {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(errProto[5:6])
if err != nil || c.ps.state != OP_MINUS_ERR_SPC {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
// Check with split arg buffer
err = c.parse(errProto[6:7])
if err != nil || c.ps.state != MINUS_ERR_ARG {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(errProto[7:10])
if err != nil || c.ps.state != MINUS_ERR_ARG {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(errProto[10 : len(errProto)-2])
if err != nil || c.ps.state != MINUS_ERR_ARG {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
if c.ps.argBuf == nil {
t.Fatal("ArgBuf should not be nil")
}
s := string(c.ps.argBuf)
if s != expectedError {
t.Fatalf("Expected %v, got %v", expectedError, s)
}
err = c.parse(errProto[len(errProto)-2:])
if err != nil || c.ps.state != OP_START {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
// Check without split arg buffer
errProto = []byte("-ERR 'Any error'\r\n")
err = c.parse(errProto)
if err != nil || c.ps.state != OP_START {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
}
func TestParserOK(t *testing.T) {
c := &Conn{}
c.ps = &parseState{}
if c.ps.state != OP_START {
t.Fatalf("Expected OP_START vs %d\n", c.ps.state)
}
errProto := []byte("+OKay\r\n")
err := c.parse(errProto[:1])
if err != nil || c.ps.state != OP_PLUS {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(errProto[1:2])
if err != nil || c.ps.state != OP_PLUS_O {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(errProto[2:3])
if err != nil || c.ps.state != OP_PLUS_OK {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(errProto[3:])
if err != nil || c.ps.state != OP_START {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
}
func TestParserShouldFail(t *testing.T) {
c := &Conn{}
c.ps = &parseState{}
if err := c.parse([]byte(" PING")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("POO")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("Px")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("PIx")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("PINx")); err == nil {
t.Fatal("Should have received a parse error")
}
// Stop here because 'PING' protos are tolerant for anything between PING and \n
c.ps.state = OP_START
if err := c.parse([]byte("POx")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("PONx")); err == nil {
t.Fatal("Should have received a parse error")
}
// Stop here because 'PONG' protos are tolerant for anything between PONG and \n
c.ps.state = OP_START
if err := c.parse([]byte("ZOO")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("Mx\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("MSx\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("MSGx\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("MSG foo\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("MSG \r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("MSG foo 1\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("MSG foo bar 1\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("MSG foo bar 1 baz\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("MSG foo 1 bar baz\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("+x\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("+Ox\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("-x\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("-Ex\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("-ERx\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
c.ps.state = OP_START
if err := c.parse([]byte("-ERRx\r\n")); err == nil {
t.Fatal("Should have received a parse error")
}
}
func TestParserSplitMsg(t *testing.T) {
nc := &Conn{}
nc.ps = &parseState{}
buf := []byte("MSG a\r\n")
err := nc.parse(buf)
if err == nil {
t.Fatal("Expected an error")
}
nc.ps = &parseState{}
buf = []byte("MSG a b c\r\n")
err = nc.parse(buf)
if err == nil {
t.Fatal("Expected an error")
}
nc.ps = &parseState{}
expectedCount := uint64(1)
expectedSize := uint64(3)
buf = []byte("MSG a")
err = nc.parse(buf)
if err != nil {
t.Fatalf("Parser error: %v", err)
}
if nc.ps.argBuf == nil {
t.Fatal("Arg buffer should have been created")
}
buf = []byte(" 1 3\r\nf")
err = nc.parse(buf)
if err != nil {
t.Fatalf("Parser error: %v", err)
}
if nc.ps.ma.size != 3 {
t.Fatalf("Wrong msg size: %d instead of 3", nc.ps.ma.size)
}
if nc.ps.ma.sid != 1 {
t.Fatalf("Wrong sid: %d instead of 1", nc.ps.ma.sid)
}
if string(nc.ps.ma.subject) != "a" {
t.Fatalf("Wrong subject: '%s' instead of 'a'", string(nc.ps.ma.subject))
}
if nc.ps.msgBuf == nil {
t.Fatal("Msg buffer should have been created")
}
buf = []byte("oo\r\n")
err = nc.parse(buf)
if err != nil {
t.Fatalf("Parser error: %v", err)
}
if (nc.Statistics.InMsgs != expectedCount) || (nc.Statistics.InBytes != expectedSize) {
t.Fatalf("Wrong stats: %d - %d instead of %d - %d", nc.Statistics.InMsgs, nc.Statistics.InBytes, expectedCount, expectedSize)
}
if (nc.ps.argBuf != nil) || (nc.ps.msgBuf != nil) {
t.Fatal("Buffers should be nil now")
}
buf = []byte("MSG a 1 3\r\nfo")
err = nc.parse(buf)
if err != nil {
t.Fatalf("Parser error: %v", err)
}
if nc.ps.ma.size != 3 {
t.Fatalf("Wrong msg size: %d instead of 3", nc.ps.ma.size)
}
if nc.ps.ma.sid != 1 {
t.Fatalf("Wrong sid: %d instead of 1", nc.ps.ma.sid)
}
if string(nc.ps.ma.subject) != "a" {
t.Fatalf("Wrong subject: '%s' instead of 'a'", string(nc.ps.ma.subject))
}
if nc.ps.argBuf == nil {
t.Fatal("Arg buffer should have been created")
}
if nc.ps.msgBuf == nil {
t.Fatal("Msg buffer should have been created")
}
expectedCount++
expectedSize += 3
buf = []byte("o\r\n")
err = nc.parse(buf)
if err != nil {
t.Fatalf("Parser error: %v", err)
}
if (nc.Statistics.InMsgs != expectedCount) || (nc.Statistics.InBytes != expectedSize) {
t.Fatalf("Wrong stats: %d - %d instead of %d - %d", nc.Statistics.InMsgs, nc.Statistics.InBytes, expectedCount, expectedSize)
}
if (nc.ps.argBuf != nil) || (nc.ps.msgBuf != nil) {
t.Fatal("Buffers should be nil now")
}
buf = []byte("MSG a 1 6\r\nfo")
err = nc.parse(buf)
if err != nil {
t.Fatalf("Parser error: %v", err)
}
if nc.ps.ma.size != 6 {
t.Fatalf("Wrong msg size: %d instead of 3", nc.ps.ma.size)
}
if nc.ps.ma.sid != 1 {
t.Fatalf("Wrong sid: %d instead of 1", nc.ps.ma.sid)
}
if string(nc.ps.ma.subject) != "a" {
t.Fatalf("Wrong subject: '%s' instead of 'a'", string(nc.ps.ma.subject))
}
if nc.ps.argBuf == nil {
t.Fatal("Arg buffer should have been created")
}
if nc.ps.msgBuf == nil {
t.Fatal("Msg buffer should have been created")
}
buf = []byte("ob")
err = nc.parse(buf)
if err != nil {
t.Fatalf("Parser error: %v", err)
}
expectedCount++
expectedSize += 6
buf = []byte("ar\r\n")
err = nc.parse(buf)
if err != nil {
t.Fatalf("Parser error: %v", err)
}
if (nc.Statistics.InMsgs != expectedCount) || (nc.Statistics.InBytes != expectedSize) {
t.Fatalf("Wrong stats: %d - %d instead of %d - %d", nc.Statistics.InMsgs, nc.Statistics.InBytes, expectedCount, expectedSize)
}
if (nc.ps.argBuf != nil) || (nc.ps.msgBuf != nil) {
t.Fatal("Buffers should be nil now")
}
// Let's have a msg that is bigger than the parser's scratch size.
// Since we prepopulate the msg with 'foo', adding 3 to the size.
msgSize := cap(nc.ps.scratch) + 100 + 3
buf = []byte(fmt.Sprintf("MSG a 1 b %d\r\nfoo", msgSize))
err = nc.parse(buf)
if err != nil {
t.Fatalf("Parser error: %v", err)
}
if nc.ps.ma.size != msgSize {
t.Fatalf("Wrong msg size: %d instead of %d", nc.ps.ma.size, msgSize)
}
if nc.ps.ma.sid != 1 {
t.Fatalf("Wrong sid: %d instead of 1", nc.ps.ma.sid)
}
if string(nc.ps.ma.subject) != "a" {
t.Fatalf("Wrong subject: '%s' instead of 'a'", string(nc.ps.ma.subject))
}
if string(nc.ps.ma.reply) != "b" {
t.Fatalf("Wrong reply: '%s' instead of 'b'", string(nc.ps.ma.reply))
}
if nc.ps.argBuf == nil {
t.Fatal("Arg buffer should have been created")
}
if nc.ps.msgBuf == nil {
t.Fatal("Msg buffer should have been created")
}
expectedCount++
expectedSize += uint64(msgSize)
bufSize := msgSize - 3
buf = make([]byte, bufSize)
for i := 0; i < bufSize; i++ {
buf[i] = byte('a' + (i % 26))
}
err = nc.parse(buf)
if err != nil {
t.Fatalf("Parser error: %v", err)
}
if nc.ps.state != MSG_PAYLOAD {
t.Fatalf("Wrong state: %v instead of %v", nc.ps.state, MSG_PAYLOAD)
}
if nc.ps.ma.size != msgSize {
t.Fatalf("Wrong (ma) msg size: %d instead of %d", nc.ps.ma.size, msgSize)
}
if len(nc.ps.msgBuf) != msgSize {
t.Fatalf("Wrong msg size: %d instead of %d", len(nc.ps.msgBuf), msgSize)
}
// Check content:
if string(nc.ps.msgBuf[0:3]) != "foo" {
t.Fatalf("Wrong msg content: %s", string(nc.ps.msgBuf))
}
for k := 3; k < nc.ps.ma.size; k++ {
if nc.ps.msgBuf[k] != byte('a'+((k-3)%26)) {
t.Fatalf("Wrong msg content: %s", string(nc.ps.msgBuf))
}
}
buf = []byte("\r\n")
if err := nc.parse(buf); err != nil {
t.Fatalf("Unexpected error during parsing: %v", err)
}
if (nc.Statistics.InMsgs != expectedCount) || (nc.Statistics.InBytes != expectedSize) {
t.Fatalf("Wrong stats: %d - %d instead of %d - %d", nc.Statistics.InMsgs, nc.Statistics.InBytes, expectedCount, expectedSize)
}
if (nc.ps.argBuf != nil) || (nc.ps.msgBuf != nil) {
t.Fatal("Buffers should be nil now")
}
if nc.ps.state != OP_START {
t.Fatalf("Wrong state: %v", nc.ps.state)
}
}
func TestNormalizeError(t *testing.T) {
received := "Typical Error"
expected := strings.ToLower(received)
if s := normalizeErr("-ERR '" + received + "'"); s != expected {
t.Fatalf("Expected '%s', got '%s'", expected, s)
}
received = "Trim Surrounding Spaces"
expected = strings.ToLower(received)
if s := normalizeErr("-ERR '" + received + "' "); s != expected {
t.Fatalf("Expected '%s', got '%s'", expected, s)
}
received = "Trim Surrounding Spaces Without Quotes"
expected = strings.ToLower(received)
if s := normalizeErr("-ERR " + received + " "); s != expected {
t.Fatalf("Expected '%s', got '%s'", expected, s)
}
received = "Error Without Quotes"
expected = strings.ToLower(received)
if s := normalizeErr("-ERR " + received); s != expected {
t.Fatalf("Expected '%s', got '%s'", expected, s)
}
received = "Error With Quote Only On Left"
expected = strings.ToLower(received)
if s := normalizeErr("-ERR '" + received); s != expected {
t.Fatalf("Expected '%s', got '%s'", expected, s)
}
received = "Error With Quote Only On Right"
expected = strings.ToLower(received)
if s := normalizeErr("-ERR " + received + "'"); s != expected {
t.Fatalf("Expected '%s', got '%s'", expected, s)
}
}
func TestAsyncINFO(t *testing.T) {
opts := GetDefaultOptions()
c := &Conn{Opts: opts}
c.ps = &parseState{}
if c.ps.state != OP_START {
t.Fatalf("Expected OP_START vs %d\n", c.ps.state)
}
info := []byte("INFO {}\r\n")
if c.ps.state != OP_START {
t.Fatalf("Expected OP_START vs %d\n", c.ps.state)
}
err := c.parse(info[:1])
if err != nil || c.ps.state != OP_I {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(info[1:2])
if err != nil || c.ps.state != OP_IN {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(info[2:3])
if err != nil || c.ps.state != OP_INF {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(info[3:4])
if err != nil || c.ps.state != OP_INFO {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(info[4:5])
if err != nil || c.ps.state != OP_INFO_SPC {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
err = c.parse(info[5:])
if err != nil || c.ps.state != OP_START {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
// All at once
err = c.parse(info)
if err != nil || c.ps.state != OP_START {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
// Server pool needs to be setup
c.setupServerPool()
// Partials requiring argBuf
expectedServer := serverInfo{
Id: "test",
Host: "localhost",
Port: 4222,
Version: "1.2.3",
AuthRequired: true,
TLSRequired: true,
MaxPayload: 2 * 1024 * 1024,
ConnectURLs: []string{"localhost:5222", "localhost:6222"},
}
// Set NoRandomize so that the check with expectedServer info
// matches.
c.Opts.NoRandomize = true
b, _ := json.Marshal(expectedServer)
info = []byte(fmt.Sprintf("INFO %s\r\n", b))
if c.ps.state != OP_START {
t.Fatalf("Expected OP_START vs %d\n", c.ps.state)
}
err = c.parse(info[:9])
if err != nil || c.ps.state != INFO_ARG || c.ps.argBuf == nil {
t.Fatalf("Unexpected: %d err: %v argBuf: %v\n", c.ps.state, err, c.ps.argBuf)
}
err = c.parse(info[9:11])
if err != nil || c.ps.state != INFO_ARG || c.ps.argBuf == nil {
t.Fatalf("Unexpected: %d err: %v argBuf: %v\n", c.ps.state, err, c.ps.argBuf)
}
err = c.parse(info[11:])
if err != nil || c.ps.state != OP_START || c.ps.argBuf != nil {
t.Fatalf("Unexpected: %d err: %v argBuf: %v\n", c.ps.state, err, c.ps.argBuf)
}
if !reflect.DeepEqual(c.info, expectedServer) {
t.Fatalf("Expected server info to be: %v, got: %v", expectedServer, c.info)
}
// Good INFOs
good := []string{"INFO {}\r\n", "INFO {}\r\n", "INFO {} \r\n", "INFO { \"server_id\": \"test\" } \r\n", "INFO {\"connect_urls\":[]}\r\n"}
for _, gi := range good {
c.ps = &parseState{}
err = c.parse([]byte(gi))
if err != nil || c.ps.state != OP_START {
t.Fatalf("Protocol %q should be fine. Err=%v state=%v", gi, err, c.ps.state)
}
}
// Wrong INFOs
wrong := []string{"IxNFO {}\r\n", "INxFO {}\r\n", "INFxO {}\r\n", "INFOx {}\r\n", "INFO{}\r\n", "INFO {}"}
for _, wi := range wrong {
c.ps = &parseState{}
err = c.parse([]byte(wi))
if err == nil && c.ps.state == OP_START {
t.Fatalf("Protocol %q should have failed", wi)
}
}
checkPool := func(urls ...string) {
// Check both pool and urls map
if len(c.srvPool) != len(urls) {
stackFatalf(t, "Pool should have %d elements, has %d", len(urls), len(c.srvPool))
}
if len(c.urls) != len(urls) {
stackFatalf(t, "Map should have %d elements, has %d", len(urls), len(c.urls))
}
for _, url := range urls {
if _, present := c.urls[url]; !present {
stackFatalf(t, "Pool should have %q", url)
}
}
}
// Now test the decoding of "connect_urls"
// Reset the pool
c.setupServerPool()
// Reinitialize the parser
c.ps = &parseState{}
info = []byte("INFO {\"connect_urls\":[\"localhost:4222\", \"localhost:5222\"]}\r\n")
err = c.parse(info)
if err != nil || c.ps.state != OP_START {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
// Pool now should contain localhost:4222 (the default URL) and localhost:5222
checkPool("localhost:4222", "localhost:5222")
// Make sure that if client receives the same, it is not added again.
err = c.parse(info)
if err != nil || c.ps.state != OP_START {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
// Pool should still contain localhost:4222 (the default URL) and localhost:5222
checkPool("localhost:4222", "localhost:5222")
// Receive a new URL
info = []byte("INFO {\"connect_urls\":[\"localhost:4222\", \"localhost:5222\", \"localhost:6222\"]}\r\n")
err = c.parse(info)
if err != nil || c.ps.state != OP_START {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
// Pool now should contain localhost:4222 (the default URL) localhost:5222 and localhost:6222
checkPool("localhost:4222", "localhost:5222", "localhost:6222")
// Check that pool may be randomized on setup, but new URLs are always
// added at end of pool.
c.Opts.NoRandomize = false
c.Opts.Servers = testServers
// Reset the pool
c.setupServerPool()
// Reinitialize the parser
c.ps = &parseState{}
// Capture the pool sequence after randomization
urlsAfterPoolSetup := make([]string, 0, len(c.srvPool))
for _, srv := range c.srvPool {
urlsAfterPoolSetup = append(urlsAfterPoolSetup, srv.url.Host)
}
checkPoolOrderDidNotChange := func() {
for i := 0; i < len(urlsAfterPoolSetup); i++ {
if c.srvPool[i].url.Host != urlsAfterPoolSetup[i] {
stackFatalf(t, "Pool should have %q at index %q, has %q", urlsAfterPoolSetup[i], i, c.srvPool[i].url.Host)
}
}
}
// Add new urls
newURLs := []string{
"localhost:6222",
"localhost:7222",
"localhost:8222\", \"localhost:9222",
"localhost:10222\", \"localhost:11222\", \"localhost:12222,",
}
for _, newURL := range newURLs {
info = []byte("INFO {\"connect_urls\":[\"" + newURL + "]}\r\n")
err = c.parse(info)
if err != nil || c.ps.state != OP_START {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
// Check that pool order does not change up to the new addition(s).
checkPoolOrderDidNotChange()
}
}
func TestConnServers(t *testing.T) {
opts := GetDefaultOptions()
c := &Conn{Opts: opts}
c.ps = &parseState{}
c.setupServerPool()
validateURLs := func(serverUrls []string, expectedUrls ...string) {
var found bool
if len(serverUrls) != len(expectedUrls) {
stackFatalf(t, "Array should have %d elements, has %d", len(expectedUrls), len(serverUrls))
}
for _, ev := range expectedUrls {
found = false
for _, av := range serverUrls {
if ev == av {
found = true
break
}
}
if !found {
stackFatalf(t, "array is missing %q in %v", ev, serverUrls)
}
}
}
// check the default url
validateURLs(c.Servers(), "nats://localhost:4222")
if len(c.DiscoveredServers()) != 0 {
t.Fatalf("Expected no discovered servers")
}
// Add a new URL
err := c.parse([]byte("INFO {\"connect_urls\":[\"localhost:5222\"]}\r\n"))
if err != nil {
t.Fatalf("Unexpected: %d : %v\n", c.ps.state, err)
}
// Server list should now contain both the default and the new url.
validateURLs(c.Servers(), "nats://localhost:4222", "nats://localhost:5222")
// Discovered servers should only contain the new url.
validateURLs(c.DiscoveredServers(), "nats://localhost:5222")
// verify user credentials are stripped out.
opts.Servers = []string{"nats://user:pass@localhost:4333", "nats://token@localhost:4444"}
c = &Conn{Opts: opts}
c.ps = &parseState{}
c.setupServerPool()
validateURLs(c.Servers(), "nats://localhost:4333", "nats://localhost:4444")
}
func TestConnAsyncCBDeadlock(t *testing.T) {
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
ch := make(chan bool)
o := GetDefaultOptions()
o.Url = fmt.Sprintf("nats://127.0.0.1:%d", TEST_PORT)
o.ClosedCB = func(_ *Conn) {
ch <- true
}
o.AsyncErrorCB = func(nc *Conn, sub *Subscription, err error) {
// do something with nc that requires locking behind the scenes
_ = nc.LastError()
}
nc, err := o.Connect()
if err != nil {
t.Fatalf("Should have connected ok: %v", err)
}
total := 300
wg := &sync.WaitGroup{}
wg.Add(total)
for i := 0; i < total; i++ {
go func() {
// overwhelm asyncCB with errors
nc.processErr(AUTHORIZATION_ERR)
wg.Done()
}()
}
wg.Wait()
nc.Close()
if e := Wait(ch); e != nil {
t.Fatal("Deadlock")
}
}
func TestPingTimerLeakedOnClose(t *testing.T) {
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
nc, err := Connect(fmt.Sprintf("nats://127.0.0.1:%d", TEST_PORT))
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
nc.Close()
// There was a bug (issue #338) that if connection
// was created and closed quickly, the pinger would
// be created from a go-routine and would cause the
// connection object to be retained until the ping
// timer fired.
// Wait a little bit and check if the timer is set.
// With the defect it would be.
time.Sleep(100 * time.Millisecond)
nc.mu.Lock()
pingTimerSet := nc.ptmr != nil
nc.mu.Unlock()
if pingTimerSet {
t.Fatal("Pinger timer should not be set")
}
}
func TestNoEcho(t *testing.T) {
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
url := fmt.Sprintf("nats://127.0.0.1:%d", TEST_PORT)
nc, err := Connect(url, NoEcho())
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
defer nc.Close()
r := int32(0)
_, err = nc.Subscribe("foo", func(m *Msg) {
atomic.AddInt32(&r, 1)
})
if err != nil {
t.Fatalf("Error on subscribe: %v", err)
}
err = nc.Publish("foo", []byte("Hello World"))
if err != nil {
t.Fatalf("Error on publish: %v", err)
}
nc.Flush()
nc.Flush()
if nr := atomic.LoadInt32(&r); nr != 0 {
t.Fatalf("Expected no messages echoed back, received %d\n", nr)
}
}
func TestNoEchoOldServer(t *testing.T) {
opts := GetDefaultOptions()
opts.Url = DefaultURL
opts.NoEcho = true
nc := &Conn{Opts: opts}
if err := nc.setupServerPool(); err != nil {
t.Fatalf("Problem setting up Server Pool: %v\n", err)
}
// Old style with no proto, meaning 0. We need Proto:1 for NoEcho support.
oldInfo := "{\"server_id\":\"22\",\"version\":\"1.1.0\",\"go\":\"go1.10.2\",\"port\":4222,\"max_payload\":1048576}"
err := nc.processInfo(oldInfo)
if err != nil {
t.Fatalf("Error processing old style INFO: %v\n", err)
}
// Make sure connectProto generates an error.
_, err = nc.connectProto()
if err == nil {
t.Fatalf("Expected an error but got none\n")
}
}
func TestNkeyAuth(t *testing.T) {
if server.VERSION[0] == '1' {
t.Skip()
}
seed := []byte("SUAKYRHVIOREXV7EUZTBHUHL7NUMHPMAS7QMDU3GTIUWEI5LDNOXD43IZY")
kp, _ := nkeys.FromSeed(seed)
pub, _ := kp.PublicKey()
sopts := gnatsd.DefaultTestOptions
sopts.Port = TEST_PORT
sopts.Nkeys = []*server.NkeyUser{&server.NkeyUser{Nkey: string(pub)}}
ts := RunServerWithOptions(sopts)
defer ts.Shutdown()
opts := reconnectOpts
if _, err := opts.Connect(); err == nil {
t.Fatalf("Expected to fail with no nkey auth defined")
}
opts.Nkey = string(pub)
if _, err := opts.Connect(); err != ErrNkeyButNoSigCB {
t.Fatalf("Expected to fail with nkey defined but no signature callback, got %v", err)
}
badSign := func(nonce []byte) []byte {
return []byte("VALID?")
}
opts.SignatureCB = badSign
if _, err := opts.Connect(); err == nil {
t.Fatalf("Expected to fail with nkey and bad signature callback")
}
goodSign := func(nonce []byte) []byte {
sig, err := kp.Sign(nonce)
if err != nil {
t.Fatalf("Failed signing nonce: %v", err)
}
return sig
}
opts.SignatureCB = goodSign
nc, err := opts.Connect()
if err != nil {
t.Fatalf("Expected to succeed but got %v", err)
}
// Now disconnect by killing the server and restarting.
ts.Shutdown()
ts = RunServerWithOptions(sopts)
defer ts.Shutdown()
if err := nc.FlushTimeout(5 * time.Second); err != nil {
t.Fatalf("Error on Flush: %v", err)
}
}
func createTmpFile(t *testing.T, content []byte) string {
t.Helper()
conf, err := ioutil.TempFile("", "")
if err != nil {
t.Fatalf("Error creating conf file: %v", err)
}
fName := conf.Name()
conf.Close()
if err := ioutil.WriteFile(fName, content, 0666); err != nil {
os.Remove(fName)
t.Fatalf("Error writing conf file: %v", err)
}
return fName
}
func TestNKeyOptionFromSeed(t *testing.T) {
if _, err := NkeyOptionFromSeed("file_that_does_not_exist"); err == nil {
t.Fatal("Expected error got none")
}
seedFile := createTmpFile(t, []byte(`
# No seed
THIS_NOT_A_NKEY_SEED
`))
defer os.Remove(seedFile)
if _, err := NkeyOptionFromSeed(seedFile); err == nil || !strings.Contains(err.Error(), "seed found") {
t.Fatalf("Expected error about seed not found, got %v", err)
}
os.Remove(seedFile)
seedFile = createTmpFile(t, []byte(`
# Invalid seed
SUBADSEED
`))
// Make sure that we detect SU (trim space) but it still fails because
// this is not a valid NKey.
if _, err := NkeyOptionFromSeed(seedFile); err == nil || strings.Contains(err.Error(), "seed found") {
t.Fatalf("Expected error about invalid key, got %v", err)
}
os.Remove(seedFile)
kp, _ := nkeys.CreateUser()
seed, _ := kp.Seed()
seedFile = createTmpFile(t, seed)
opt, err := NkeyOptionFromSeed(seedFile)
if err != nil {
t.Fatalf("Error: %v", err)
}
l, e := net.Listen("tcp", "127.0.0.1:0")
if e != nil {
t.Fatal("Could not listen on an ephemeral port")
}
tl := l.(*net.TCPListener)
defer tl.Close()
addr := tl.Addr().(*net.TCPAddr)
wg := sync.WaitGroup{}
wg.Add(1)
ch := make(chan bool, 1)
rs := func(ch chan bool) {
defer wg.Done()
conn, err := l.Accept()
if err != nil {
t.Fatalf("Error accepting client connection: %v\n", err)
}
defer conn.Close()
info := "INFO {\"server_id\":\"foobar\",\"nonce\":\"anonce\"}\r\n"
conn.Write([]byte(info))
// Read connect and ping commands sent from the client
br := bufio.NewReaderSize(conn, 10*1024)
line, _, _ := br.ReadLine()
if err != nil {
t.Fatalf("Expected CONNECT and PING from client, got: %s", err)
}
// If client got an error reading the seed, it will not send it
if bytes.Contains(line, []byte(`"sig":`)) {
conn.Write([]byte("PONG\r\n"))
} else {
conn.Write([]byte(`-ERR go away\r\n`))
conn.Close()
}
// Now wait to be notified that we can finish
<-ch
}
go rs(ch)
nc, err := Connect(fmt.Sprintf("nats://127.0.0.1:%d", addr.Port), opt)
if err != nil {
t.Fatalf("Error on connect: %v", err)
}
nc.Close()
close(ch)
wg.Wait()
// Now that option is already created, change content of file
ioutil.WriteFile(seedFile, []byte(`xxxxx`), 0666)
ch = make(chan bool, 1)
wg.Add(1)
go rs(ch)
if _, err := Connect(fmt.Sprintf("nats://127.0.0.1:%d", addr.Port), opt); err == nil {
t.Fatal("Expected error, got none")
}
close(ch)
wg.Wait()
}
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