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parser_test.go
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package octetcounting
import (
"fmt"
"strings"
"testing"
"github.com/leodido/go-syslog/v4"
"github.com/leodido/go-syslog/v4/rfc5424"
syslogtesting "github.com/leodido/go-syslog/v4/testing"
"github.com/stretchr/testify/assert"
)
type testCase struct {
descr string
input string
results []syslog.Result
bestEffortResults []syslog.Result
maxMessageLength int
}
var testCases []testCase
func getTimestampError(col int) error {
return fmt.Errorf(rfc5424.ErrTimestamp+rfc5424.ColumnPositionTemplate, col)
}
func getParsingError(col int) error {
return fmt.Errorf(rfc5424.ErrParse+rfc5424.ColumnPositionTemplate, col)
}
func getTestCases() []testCase {
return []testCase{
{
descr: "empty",
input: "",
results: []syslog.Result{
{Error: fmt.Errorf("found %s, expecting a %s", EOF, MSGLEN)},
},
bestEffortResults: []syslog.Result{
{Error: fmt.Errorf("found %s, expecting a %s", EOF, MSGLEN)},
},
},
{
descr: "1st ok/2nd mf", // mf means malformed syslog message
input: "16 <1>1 - - - - - -17 <2>12 A B C D E -",
// results w/o best effort
results: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(1).SetVersion(1),
},
{
Error: getTimestampError(6),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(1).SetVersion(1),
},
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(2).SetVersion(12),
Error: getTimestampError(6),
},
},
},
{
descr: "1st ok/2nd ko", // ko means wrong token
input: "16 <1>1 - - - - - -xaaa",
// results w/o best effort
results: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(1).SetVersion(1),
},
{
Error: fmt.Errorf("found %s, expecting a %s", Token{ILLEGAL, []byte("x")}, MSGLEN),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(1).SetVersion(1),
},
{
Error: fmt.Errorf("found %s, expecting a %s", Token{ILLEGAL, []byte("x")}, MSGLEN),
},
},
},
{
descr: "1st ml/2nd ko",
input: "16 <1>1 A B C D E -xaaa",
// results w/o best effort
results: []syslog.Result{
{
Error: getTimestampError(5),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(1).SetVersion(1),
Error: getTimestampError(5),
},
{
Error: fmt.Errorf("found %s, expecting a %s", Token{ILLEGAL, []byte("x")}, MSGLEN),
},
},
},
{
descr: "1st ok//utf8",
input: "23 <1>1 - - - - - - hellø", // msglen MUST be the octet count
//results w/o best effort
results: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(1).
SetVersion(1).
SetMessage("hellø"),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(1).
SetVersion(1).
SetMessage("hellø"),
},
},
},
{
descr: "1st ko//incomplete SYSLOGMSG",
input: "16 <1>1",
// results w/o best effort
results: []syslog.Result{
{
Error: fmt.Errorf(`found %s after "%s", expecting a %s containing %d octets`, EOF, "<1>1", SYSLOGMSG, 16),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(1).SetVersion(1),
Error: getParsingError(4),
// Error: fmt.Errorf(`found %s after "%s", expecting a %s containing %d octets`, EOF, "<1>1", SYSLOGMSG, 16),
},
},
},
{
descr: "1st ko//missing WS found ILLEGAL",
input: "16<1>1",
// results w/o best effort
results: []syslog.Result{
{
Error: fmt.Errorf("found %s, expecting a %s", Token{ILLEGAL, []byte("<")}, WS),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Error: fmt.Errorf("found %s, expecting a %s", Token{ILLEGAL, []byte("<")}, WS),
},
},
},
{
descr: "1st ko//missing WS found EOF",
input: "1",
// results w/o best effort
results: []syslog.Result{
{
Error: fmt.Errorf("found %s, expecting a %s", EOF, WS),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Error: fmt.Errorf("found %s, expecting a %s", EOF, WS),
},
},
},
{
descr: "1st ok/2nd ok/LF/3rd ok", // LF means new line aka \n
input: "48 <1>1 2003-10-11T22:14:15.003Z host.local - - - -25 <3>1 - host.local - - - -\n38 <2>1 - host.local su - - - κόσμε",
// results w/o best effort
results: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(1).
SetVersion(1).
SetTimestamp("2003-10-11T22:14:15.003Z").
SetHostname("host.local"),
},
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(3).
SetVersion(1).
SetHostname("host.local"),
},
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(2).
SetVersion(1).
SetHostname("host.local").
SetAppname("su").
SetMessage("κόσμε"),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(1).
SetVersion(1).
SetTimestamp("2003-10-11T22:14:15.003Z").
SetHostname("host.local"),
},
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(3).
SetVersion(1).
SetHostname("host.local"),
},
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(2).
SetVersion(1).
SetHostname("host.local").
SetAppname("su").
SetMessage("κόσμε"),
},
},
},
{
descr: "1st ok/2nd mf/3rd ok", // mf means malformed syslog message
input: "16 <1>1 - - - - - -17 <2>12 A B C D E -16 <1>1 - - - - - -",
// results w/o best effort
results: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(1).SetVersion(1),
},
{
Error: getTimestampError(6),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(1).SetVersion(1),
},
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(2).SetVersion(12),
Error: getTimestampError(6),
},
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(1).SetVersion(1),
},
},
},
{
descr: "1st ok//max",
input: fmt.Sprintf(
"8192 <%d>%d %s %s %s %s %s - %s",
syslogtesting.MaxPriority,
syslogtesting.MaxVersion,
syslogtesting.MaxRFC3339MicroTimestamp,
string(syslogtesting.MaxHostname),
string(syslogtesting.MaxAppname),
string(syslogtesting.MaxProcID),
string(syslogtesting.MaxMsgID),
string(syslogtesting.MaxMessage),
),
// results w/o best effort
results: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.MaxMessage)),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.MaxMessage)),
},
},
},
{
descr: "1st ok//longer-max",
input: fmt.Sprintf(
"65529 <%d>%d %s %s %s %s %s - %s",
syslogtesting.MaxPriority,
syslogtesting.MaxVersion,
syslogtesting.MaxRFC3339MicroTimestamp,
string(syslogtesting.MaxHostname),
string(syslogtesting.MaxAppname),
string(syslogtesting.MaxProcID),
string(syslogtesting.MaxMsgID),
string(syslogtesting.LongerMaxMessage),
),
// results w/o best effort
results: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.LongerMaxMessage)),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.LongerMaxMessage)),
},
},
maxMessageLength: 65529,
},
{
descr: "1st ok/2nd ok//max/max",
input: fmt.Sprintf(
"8192 <%d>%d %s %s %s %s %s - %s8192 <%d>%d %s %s %s %s %s - %s",
syslogtesting.MaxPriority,
syslogtesting.MaxVersion,
syslogtesting.MaxRFC3339MicroTimestamp,
string(syslogtesting.MaxHostname),
string(syslogtesting.MaxAppname),
string(syslogtesting.MaxProcID),
string(syslogtesting.MaxMsgID),
string(syslogtesting.MaxMessage),
syslogtesting.MaxPriority,
syslogtesting.MaxVersion,
syslogtesting.MaxRFC3339MicroTimestamp,
string(syslogtesting.MaxHostname),
string(syslogtesting.MaxAppname),
string(syslogtesting.MaxProcID),
string(syslogtesting.MaxMsgID),
string(syslogtesting.MaxMessage),
),
// results w/o best effort
results: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.MaxMessage)),
},
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.MaxMessage)),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.MaxMessage)),
},
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.MaxMessage)),
},
},
},
{
descr: "1st ok/2nd ok//longer-max/longer-max",
input: fmt.Sprintf(
"65529 <%d>%d %s %s %s %s %s - %s65529 <%d>%d %s %s %s %s %s - %s",
syslogtesting.MaxPriority,
syslogtesting.MaxVersion,
syslogtesting.MaxRFC3339MicroTimestamp,
string(syslogtesting.MaxHostname),
string(syslogtesting.MaxAppname),
string(syslogtesting.MaxProcID),
string(syslogtesting.MaxMsgID),
string(syslogtesting.LongerMaxMessage),
syslogtesting.MaxPriority,
syslogtesting.MaxVersion,
syslogtesting.MaxRFC3339MicroTimestamp,
string(syslogtesting.MaxHostname),
string(syslogtesting.MaxAppname),
string(syslogtesting.MaxProcID),
string(syslogtesting.MaxMsgID),
string(syslogtesting.LongerMaxMessage),
),
// results w/o best effort
results: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.LongerMaxMessage)),
},
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.LongerMaxMessage)),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.LongerMaxMessage)),
},
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.LongerMaxMessage)),
},
},
maxMessageLength: 65529,
},
{
descr: "1st ok/2nd ok/3rd ok//max/no/max",
input: fmt.Sprintf(
"8192 <%d>%d %s %s %s %s %s - %s16 <1>1 - - - - - -8192 <%d>%d %s %s %s %s %s - %s",
syslogtesting.MaxPriority,
syslogtesting.MaxVersion,
syslogtesting.MaxRFC3339MicroTimestamp,
string(syslogtesting.MaxHostname),
string(syslogtesting.MaxAppname),
string(syslogtesting.MaxProcID),
string(syslogtesting.MaxMsgID),
string(syslogtesting.MaxMessage),
syslogtesting.MaxPriority,
syslogtesting.MaxVersion,
syslogtesting.MaxRFC3339MicroTimestamp,
string(syslogtesting.MaxHostname),
string(syslogtesting.MaxAppname),
string(syslogtesting.MaxProcID),
string(syslogtesting.MaxMsgID),
string(syslogtesting.MaxMessage),
),
// results w/o best effort
results: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.MaxMessage)),
},
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(1).SetVersion(1),
},
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.MaxMessage)),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.MaxMessage)),
},
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(1).SetVersion(1),
},
{
Message: (&rfc5424.SyslogMessage{}).
SetPriority(syslogtesting.MaxPriority).
SetVersion(syslogtesting.MaxVersion).
SetTimestamp(syslogtesting.MaxRFC3339MicroTimestamp).
SetHostname(string(syslogtesting.MaxHostname)).
SetAppname(string(syslogtesting.MaxAppname)).
SetProcID(string(syslogtesting.MaxProcID)).
SetMsgID(string(syslogtesting.MaxMsgID)).
SetMessage(string(syslogtesting.MaxMessage)),
},
},
},
{
descr: "MSGLEN gt max message length",
input: "16 <1>1 - - - - - -",
results: []syslog.Result{
{Error: fmt.Errorf("message too long to parse. was size %d, max length %d", 16, 10)},
},
bestEffortResults: []syslog.Result{
{Error: fmt.Errorf("message too long to parse. was size %d, max length %d", 16, 10)},
},
maxMessageLength: 10,
},
{
descr: "1st uf/2nd ok//incomplete SYSLOGMSG/notdetectable",
input: "16 <1>217 <11>1 - - - - - -",
// results w/o best effort
results: []syslog.Result{
{
Error: getTimestampError(7),
},
},
// results with best effort
bestEffortResults: []syslog.Result{
{
Message: (&rfc5424.SyslogMessage{}).SetPriority(1).SetVersion(217),
Error: getTimestampError(7),
},
{
Error: fmt.Errorf("found %s, expecting a %s", WS, MSGLEN),
},
},
},
}
}
func init() {
testCases = getTestCases()
}
func TestParse(t *testing.T) {
for i := range testCases {
tc := testCases[i] // tests could be running in parallel, needs to be scoped.
if tc.maxMessageLength == 0 {
tc.maxMessageLength = 8192
}
t.Run(fmt.Sprintf("strict/%s", tc.descr), func(t *testing.T) {
t.Parallel()
res := []syslog.Result{}
strictParser := NewParser(
syslog.WithListener(func(r *syslog.Result) {
res = append(res, *r)
}),
syslog.WithMaxMessageLength(tc.maxMessageLength))
strictParser.Parse(strings.NewReader(tc.input))
assert.Equal(t, tc.results, res)
})
t.Run(fmt.Sprintf("effort/%s", tc.descr), func(t *testing.T) {
t.Parallel()
res := []syslog.Result{}
effortParser := NewParser(
syslog.WithBestEffort(),
syslog.WithListener(func(r *syslog.Result) {
res = append(res, *r)
}),
syslog.WithMaxMessageLength(tc.maxMessageLength),
)
effortParser.Parse(strings.NewReader(tc.input))
assert.Equal(t, tc.bestEffortResults, res)
})
}
}
func TestParserBestEffortOption(t *testing.T) {
p1 := NewParser().(syslog.BestEfforter)
assert.False(t, p1.HasBestEffort())
p2 := NewParser(syslog.WithBestEffort()).(syslog.BestEfforter)
assert.True(t, p2.HasBestEffort())
}