traefik/pkg/middlewares/accesslog/logger_test.go

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package accesslog
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import (
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"crypto/tls"
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"encoding/json"
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"fmt"
"io/ioutil"
"net/http"
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"net/http/httptest"
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"net/url"
"os"
"path/filepath"
"regexp"
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"strings"
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"testing"
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"time"
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"github.com/containous/traefik/v2/pkg/types"
"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
var (
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logFileNameSuffix = "/traefik/logger/test.log"
testContent = "Hello, World"
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testServiceName = "http://127.0.0.1/testService"
testRouterName = "testRouter"
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testStatus = 123
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testContentSize int64 = 12
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testHostname = "TestHost"
testUsername = "TestUser"
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testPath = "testpath"
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testPort = 8181
testProto = "HTTP/0.0"
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testScheme = "http"
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testMethod = http.MethodPost
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testReferer = "testReferer"
testUserAgent = "testUserAgent"
testRetryAttempts = 2
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testStart = time.Now()
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)
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func TestLogRotation(t *testing.T) {
tempDir, err := ioutil.TempDir("", "traefik_")
if err != nil {
t.Fatalf("Error setting up temporary directory: %s", err)
}
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defer os.RemoveAll(tempDir)
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fileName := filepath.Join(tempDir, "traefik.log")
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rotatedFileName := fileName + ".rotated"
config := &types.AccessLog{FilePath: fileName, Format: CommonFormat}
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logHandler, err := NewHandler(config)
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if err != nil {
t.Fatalf("Error creating new log handler: %s", err)
}
defer logHandler.Close()
recorder := httptest.NewRecorder()
req := httptest.NewRequest(http.MethodGet, "http://localhost", nil)
next := func(rw http.ResponseWriter, req *http.Request) {
rw.WriteHeader(http.StatusOK)
}
iterations := 20
halfDone := make(chan bool)
writeDone := make(chan bool)
go func() {
for i := 0; i < iterations; i++ {
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logHandler.ServeHTTP(recorder, req, http.HandlerFunc(next))
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if i == iterations/2 {
halfDone <- true
}
}
writeDone <- true
}()
<-halfDone
err = os.Rename(fileName, rotatedFileName)
if err != nil {
t.Fatalf("Error renaming file: %s", err)
}
err = logHandler.Rotate()
if err != nil {
t.Fatalf("Error rotating file: %s", err)
}
select {
case <-writeDone:
gotLineCount := lineCount(t, fileName) + lineCount(t, rotatedFileName)
if iterations != gotLineCount {
t.Errorf("Wanted %d written log lines, got %d", iterations, gotLineCount)
}
case <-time.After(500 * time.Millisecond):
t.Fatalf("test timed out")
}
close(halfDone)
close(writeDone)
}
func lineCount(t *testing.T, fileName string) int {
t.Helper()
fileContents, err := ioutil.ReadFile(fileName)
if err != nil {
t.Fatalf("Error reading from file %s: %s", fileName, err)
}
count := 0
for _, line := range strings.Split(string(fileContents), "\n") {
if strings.TrimSpace(line) == "" {
continue
}
count++
}
return count
}
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func TestLoggerCLF(t *testing.T) {
tmpDir := createTempDir(t, CommonFormat)
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defer os.RemoveAll(tmpDir)
logFilePath := filepath.Join(tmpDir, logFileNameSuffix)
config := &types.AccessLog{FilePath: logFilePath, Format: CommonFormat}
doLogging(t, config)
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logData, err := ioutil.ReadFile(logFilePath)
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require.NoError(t, err)
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expectedLog := ` TestHost - TestUser [13/Apr/2016:07:14:19 -0700] "POST testpath HTTP/0.0" 123 12 "testReferer" "testUserAgent" 1 "testRouter" "http://127.0.0.1/testService" 1ms`
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assertValidLogData(t, expectedLog, logData)
}
func TestAsyncLoggerCLF(t *testing.T) {
tmpDir := createTempDir(t, CommonFormat)
defer os.RemoveAll(tmpDir)
logFilePath := filepath.Join(tmpDir, logFileNameSuffix)
config := &types.AccessLog{FilePath: logFilePath, Format: CommonFormat, BufferingSize: 1024}
doLogging(t, config)
logData, err := ioutil.ReadFile(logFilePath)
require.NoError(t, err)
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expectedLog := ` TestHost - TestUser [13/Apr/2016:07:14:19 -0700] "POST testpath HTTP/0.0" 123 12 "testReferer" "testUserAgent" 1 "testRouter" "http://127.0.0.1/testService" 1ms`
assertValidLogData(t, expectedLog, logData)
}
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func assertString(exp string) func(t *testing.T, actual interface{}) {
return func(t *testing.T, actual interface{}) {
t.Helper()
assert.Equal(t, exp, actual)
}
}
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func assertNotEmpty() func(t *testing.T, actual interface{}) {
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return func(t *testing.T, actual interface{}) {
t.Helper()
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assert.NotEqual(t, "", actual)
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}
}
func assertFloat64(exp float64) func(t *testing.T, actual interface{}) {
return func(t *testing.T, actual interface{}) {
t.Helper()
assert.Equal(t, exp, actual)
}
}
func assertFloat64NotZero() func(t *testing.T, actual interface{}) {
return func(t *testing.T, actual interface{}) {
t.Helper()
assert.NotZero(t, actual)
}
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}
func TestLoggerJSON(t *testing.T) {
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testCases := []struct {
desc string
config *types.AccessLog
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tls bool
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expected map[string]func(t *testing.T, value interface{})
}{
{
desc: "default config",
config: &types.AccessLog{
FilePath: "",
Format: JSONFormat,
},
expected: map[string]func(t *testing.T, value interface{}){
RequestContentSize: assertFloat64(0),
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RequestHost: assertString(testHostname),
RequestAddr: assertString(testHostname),
RequestMethod: assertString(testMethod),
RequestPath: assertString(testPath),
RequestProtocol: assertString(testProto),
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RequestScheme: assertString(testScheme),
RequestPort: assertString("-"),
DownstreamStatus: assertFloat64(float64(testStatus)),
DownstreamContentSize: assertFloat64(float64(len(testContent))),
OriginContentSize: assertFloat64(float64(len(testContent))),
OriginStatus: assertFloat64(float64(testStatus)),
RequestRefererHeader: assertString(testReferer),
RequestUserAgentHeader: assertString(testUserAgent),
RouterName: assertString(testRouterName),
ServiceURL: assertString(testServiceName),
ClientUsername: assertString(testUsername),
ClientHost: assertString(testHostname),
ClientPort: assertString(fmt.Sprintf("%d", testPort)),
ClientAddr: assertString(fmt.Sprintf("%s:%d", testHostname, testPort)),
"level": assertString("info"),
"msg": assertString(""),
"downstream_Content-Type": assertString("text/plain; charset=utf-8"),
RequestCount: assertFloat64NotZero(),
Duration: assertFloat64NotZero(),
Overhead: assertFloat64NotZero(),
RetryAttempts: assertFloat64(float64(testRetryAttempts)),
"time": assertNotEmpty(),
"StartLocal": assertNotEmpty(),
"StartUTC": assertNotEmpty(),
},
},
{
desc: "default config, with TLS request",
config: &types.AccessLog{
FilePath: "",
Format: JSONFormat,
},
tls: true,
expected: map[string]func(t *testing.T, value interface{}){
RequestContentSize: assertFloat64(0),
RequestHost: assertString(testHostname),
RequestAddr: assertString(testHostname),
RequestMethod: assertString(testMethod),
RequestPath: assertString(testPath),
RequestProtocol: assertString(testProto),
RequestScheme: assertString("https"),
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RequestPort: assertString("-"),
DownstreamStatus: assertFloat64(float64(testStatus)),
DownstreamContentSize: assertFloat64(float64(len(testContent))),
OriginContentSize: assertFloat64(float64(len(testContent))),
OriginStatus: assertFloat64(float64(testStatus)),
RequestRefererHeader: assertString(testReferer),
RequestUserAgentHeader: assertString(testUserAgent),
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RouterName: assertString(testRouterName),
ServiceURL: assertString(testServiceName),
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ClientUsername: assertString(testUsername),
ClientHost: assertString(testHostname),
ClientPort: assertString(fmt.Sprintf("%d", testPort)),
ClientAddr: assertString(fmt.Sprintf("%s:%d", testHostname, testPort)),
"level": assertString("info"),
"msg": assertString(""),
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"downstream_Content-Type": assertString("text/plain; charset=utf-8"),
RequestCount: assertFloat64NotZero(),
Duration: assertFloat64NotZero(),
Overhead: assertFloat64NotZero(),
RetryAttempts: assertFloat64(float64(testRetryAttempts)),
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"time": assertNotEmpty(),
"StartLocal": assertNotEmpty(),
"StartUTC": assertNotEmpty(),
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},
},
{
desc: "default config drop all fields",
config: &types.AccessLog{
FilePath: "",
Format: JSONFormat,
Fields: &types.AccessLogFields{
DefaultMode: "drop",
},
},
expected: map[string]func(t *testing.T, value interface{}){
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"level": assertString("info"),
"msg": assertString(""),
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"time": assertNotEmpty(),
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"downstream_Content-Type": assertString("text/plain; charset=utf-8"),
RequestRefererHeader: assertString(testReferer),
RequestUserAgentHeader: assertString(testUserAgent),
},
},
{
desc: "default config drop all fields and headers",
config: &types.AccessLog{
FilePath: "",
Format: JSONFormat,
Fields: &types.AccessLogFields{
DefaultMode: "drop",
Headers: &types.FieldHeaders{
DefaultMode: "drop",
},
},
},
expected: map[string]func(t *testing.T, value interface{}){
"level": assertString("info"),
"msg": assertString(""),
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"time": assertNotEmpty(),
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},
},
{
desc: "default config drop all fields and redact headers",
config: &types.AccessLog{
FilePath: "",
Format: JSONFormat,
Fields: &types.AccessLogFields{
DefaultMode: "drop",
Headers: &types.FieldHeaders{
DefaultMode: "redact",
},
},
},
expected: map[string]func(t *testing.T, value interface{}){
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"level": assertString("info"),
"msg": assertString(""),
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"time": assertNotEmpty(),
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"downstream_Content-Type": assertString("REDACTED"),
RequestRefererHeader: assertString("REDACTED"),
RequestUserAgentHeader: assertString("REDACTED"),
},
},
{
desc: "default config drop all fields and headers but kept someone",
config: &types.AccessLog{
FilePath: "",
Format: JSONFormat,
Fields: &types.AccessLogFields{
DefaultMode: "drop",
Names: map[string]string{
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RequestHost: "keep",
},
Headers: &types.FieldHeaders{
DefaultMode: "drop",
Names: map[string]string{
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"Referer": "keep",
},
},
},
},
expected: map[string]func(t *testing.T, value interface{}){
RequestHost: assertString(testHostname),
"level": assertString("info"),
"msg": assertString(""),
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"time": assertNotEmpty(),
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RequestRefererHeader: assertString(testReferer),
},
},
}
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for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
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tmpDir := createTempDir(t, JSONFormat)
defer os.RemoveAll(tmpDir)
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logFilePath := filepath.Join(tmpDir, logFileNameSuffix)
test.config.FilePath = logFilePath
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if test.tls {
doLoggingTLS(t, test.config)
} else {
doLogging(t, test.config)
}
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logData, err := ioutil.ReadFile(logFilePath)
require.NoError(t, err)
jsonData := make(map[string]interface{})
err = json.Unmarshal(logData, &jsonData)
require.NoError(t, err)
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assert.Equal(t, len(test.expected), len(jsonData))
for field, assertion := range test.expected {
assertion(t, jsonData[field])
}
})
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}
}
func TestNewLogHandlerOutputStdout(t *testing.T) {
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testCases := []struct {
desc string
config *types.AccessLog
expectedLog string
}{
{
desc: "default config",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
},
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expectedLog: `TestHost - TestUser [13/Apr/2016:07:14:19 -0700] "POST testpath HTTP/0.0" 123 12 "testReferer" "testUserAgent" 23 "testRouter" "http://127.0.0.1/testService" 1ms`,
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},
{
desc: "default config with empty filters",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Filters: &types.AccessLogFilters{},
},
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expectedLog: `TestHost - TestUser [13/Apr/2016:07:14:19 -0700] "POST testpath HTTP/0.0" 123 12 "testReferer" "testUserAgent" 23 "testRouter" "http://127.0.0.1/testService" 1ms`,
},
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{
desc: "Status code filter not matching",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Filters: &types.AccessLogFilters{
StatusCodes: []string{"200"},
},
},
expectedLog: ``,
},
{
desc: "Status code filter matching",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Filters: &types.AccessLogFilters{
StatusCodes: []string{"123"},
},
},
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expectedLog: `TestHost - TestUser [13/Apr/2016:07:14:19 -0700] "POST testpath HTTP/0.0" 123 12 "testReferer" "testUserAgent" 23 "testRouter" "http://127.0.0.1/testService" 1ms`,
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},
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{
desc: "Duration filter not matching",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Filters: &types.AccessLogFilters{
MinDuration: types.Duration(1 * time.Hour),
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},
},
expectedLog: ``,
},
{
desc: "Duration filter matching",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Filters: &types.AccessLogFilters{
MinDuration: types.Duration(1 * time.Millisecond),
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},
},
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expectedLog: `TestHost - TestUser [13/Apr/2016:07:14:19 -0700] "POST testpath HTTP/0.0" 123 12 "testReferer" "testUserAgent" 23 "testRouter" "http://127.0.0.1/testService" 1ms`,
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},
{
desc: "Retry attempts filter matching",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Filters: &types.AccessLogFilters{
RetryAttempts: true,
},
},
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expectedLog: `TestHost - TestUser [13/Apr/2016:07:14:19 -0700] "POST testpath HTTP/0.0" 123 12 "testReferer" "testUserAgent" 23 "testRouter" "http://127.0.0.1/testService" 1ms`,
},
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{
desc: "Default mode keep",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Fields: &types.AccessLogFields{
DefaultMode: "keep",
},
},
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expectedLog: `TestHost - TestUser [13/Apr/2016:07:14:19 -0700] "POST testpath HTTP/0.0" 123 12 "testReferer" "testUserAgent" 23 "testRouter" "http://127.0.0.1/testService" 1ms`,
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},
{
desc: "Default mode keep with override",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Fields: &types.AccessLogFields{
DefaultMode: "keep",
Names: map[string]string{
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ClientHost: "drop",
},
},
},
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expectedLog: `- - TestUser [13/Apr/2016:07:14:19 -0700] "POST testpath HTTP/0.0" 123 12 "testReferer" "testUserAgent" 23 "testRouter" "http://127.0.0.1/testService" 1ms`,
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},
{
desc: "Default mode drop",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Fields: &types.AccessLogFields{
DefaultMode: "drop",
},
},
expectedLog: `- - - [-] "- - -" - - "testReferer" "testUserAgent" - - - 0ms`,
},
{
desc: "Default mode drop with override",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Fields: &types.AccessLogFields{
DefaultMode: "drop",
Names: map[string]string{
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ClientHost: "drop",
ClientUsername: "keep",
},
},
},
expectedLog: `- - TestUser [-] "- - -" - - "testReferer" "testUserAgent" - - - 0ms`,
},
{
desc: "Default mode drop with header dropped",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Fields: &types.AccessLogFields{
DefaultMode: "drop",
Names: map[string]string{
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ClientHost: "drop",
ClientUsername: "keep",
},
Headers: &types.FieldHeaders{
DefaultMode: "drop",
},
},
},
expectedLog: `- - TestUser [-] "- - -" - - "-" "-" - - - 0ms`,
},
{
desc: "Default mode drop with header redacted",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Fields: &types.AccessLogFields{
DefaultMode: "drop",
Names: map[string]string{
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ClientHost: "drop",
ClientUsername: "keep",
},
Headers: &types.FieldHeaders{
DefaultMode: "redact",
},
},
},
expectedLog: `- - TestUser [-] "- - -" - - "REDACTED" "REDACTED" - - - 0ms`,
},
{
desc: "Default mode drop with header redacted",
config: &types.AccessLog{
FilePath: "",
Format: CommonFormat,
Fields: &types.AccessLogFields{
DefaultMode: "drop",
Names: map[string]string{
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ClientHost: "drop",
ClientUsername: "keep",
},
Headers: &types.FieldHeaders{
DefaultMode: "keep",
Names: map[string]string{
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"Referer": "redact",
},
},
},
},
expectedLog: `- - TestUser [-] "- - -" - - "REDACTED" "testUserAgent" - - - 0ms`,
},
}
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for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
// NOTE: It is not possible to run these cases in parallel because we capture Stdout
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file, restoreStdout := captureStdout(t)
defer restoreStdout()
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doLogging(t, test.config)
written, err := ioutil.ReadFile(file.Name())
require.NoError(t, err, "unable to read captured stdout from file")
assertValidLogData(t, test.expectedLog, written)
})
}
}
func assertValidLogData(t *testing.T, expected string, logData []byte) {
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if len(expected) == 0 {
assert.Zero(t, len(logData))
t.Log(string(logData))
return
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}
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result, err := ParseAccessLog(string(logData))
require.NoError(t, err)
resultExpected, err := ParseAccessLog(expected)
require.NoError(t, err)
formatErrMessage := fmt.Sprintf(`
Expected: %s
Actual: %s`, expected, string(logData))
require.Equal(t, len(resultExpected), len(result), formatErrMessage)
assert.Equal(t, resultExpected[ClientHost], result[ClientHost], formatErrMessage)
assert.Equal(t, resultExpected[ClientUsername], result[ClientUsername], formatErrMessage)
assert.Equal(t, resultExpected[RequestMethod], result[RequestMethod], formatErrMessage)
assert.Equal(t, resultExpected[RequestPath], result[RequestPath], formatErrMessage)
assert.Equal(t, resultExpected[RequestProtocol], result[RequestProtocol], formatErrMessage)
assert.Equal(t, resultExpected[OriginStatus], result[OriginStatus], formatErrMessage)
assert.Equal(t, resultExpected[OriginContentSize], result[OriginContentSize], formatErrMessage)
assert.Equal(t, resultExpected[RequestRefererHeader], result[RequestRefererHeader], formatErrMessage)
assert.Equal(t, resultExpected[RequestUserAgentHeader], result[RequestUserAgentHeader], formatErrMessage)
assert.Regexp(t, regexp.MustCompile("[0-9]*"), result[RequestCount], formatErrMessage)
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assert.Equal(t, resultExpected[RouterName], result[RouterName], formatErrMessage)
assert.Equal(t, resultExpected[ServiceURL], result[ServiceURL], formatErrMessage)
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assert.Regexp(t, regexp.MustCompile("[0-9]*ms"), result[Duration], formatErrMessage)
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}
func captureStdout(t *testing.T) (out *os.File, restoreStdout func()) {
file, err := ioutil.TempFile("", "testlogger")
require.NoError(t, err, "failed to create temp file")
original := os.Stdout
os.Stdout = file
restoreStdout = func() {
os.Stdout = original
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os.RemoveAll(file.Name())
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}
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return file, restoreStdout
}
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func createTempDir(t *testing.T, prefix string) string {
tmpDir, err := ioutil.TempDir("", prefix)
require.NoError(t, err, "failed to create temp dir")
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return tmpDir
}
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func doLoggingTLSOpt(t *testing.T, config *types.AccessLog, enableTLS bool) {
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logger, err := NewHandler(config)
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require.NoError(t, err)
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defer logger.Close()
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if config.FilePath != "" {
_, err = os.Stat(config.FilePath)
require.NoError(t, err, fmt.Sprintf("logger should create %s", config.FilePath))
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}
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req := &http.Request{
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Header: map[string][]string{
"User-Agent": {testUserAgent},
"Referer": {testReferer},
},
Proto: testProto,
Host: testHostname,
Method: testMethod,
RemoteAddr: fmt.Sprintf("%s:%d", testHostname, testPort),
URL: &url.URL{
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User: url.UserPassword(testUsername, ""),
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Path: testPath,
},
}
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if enableTLS {
req.TLS = &tls.ConnectionState{}
}
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logger.ServeHTTP(httptest.NewRecorder(), req, http.HandlerFunc(logWriterTestHandlerFunc))
}
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func doLoggingTLS(t *testing.T, config *types.AccessLog) {
doLoggingTLSOpt(t, config, true)
}
func doLogging(t *testing.T, config *types.AccessLog) {
doLoggingTLSOpt(t, config, false)
}
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func logWriterTestHandlerFunc(rw http.ResponseWriter, r *http.Request) {
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if _, err := rw.Write([]byte(testContent)); err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
return
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}
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logData := GetLogData(r)
if logData != nil {
logData.Core[RouterName] = testRouterName
logData.Core[ServiceURL] = testServiceName
logData.Core[OriginStatus] = testStatus
logData.Core[OriginContentSize] = testContentSize
logData.Core[RetryAttempts] = testRetryAttempts
logData.Core[StartUTC] = testStart.UTC()
logData.Core[StartLocal] = testStart.Local()
} else {
http.Error(rw, "LogData is nil", http.StatusInternalServerError)
return
}
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rw.WriteHeader(testStatus)
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}