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error_logger.go
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/
error_logger.go
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package errorlogger
import (
"bytes"
"io/ioutil"
"math"
"net/http/httputil"
"github.com/slack-go/slack"
slackapi "github.com/coretrix/hitrix/service/component/slack_api"
"github.com/coretrix/hitrix/service/component/app"
//nolint
"crypto/md5"
"encoding/hex"
"encoding/json"
"fmt"
"log"
"net/http"
"os"
"runtime"
"time"
"github.com/gin-gonic/gin"
"github.com/latolukasz/beeorm"
)
const GroupError = "error"
var (
dunno = []byte("???")
centerDot = []byte("·")
dot = []byte(".")
slash = []byte("/")
)
type ErrorLogger interface {
LogErrorWithRequest(c *gin.Context, errData interface{})
LogError(dataFromRecover interface{})
log(errData interface{}, request *http.Request)
}
type ErrorMessage struct {
File string
Line int
AppName string
Request []byte
Message string
Stack []byte
}
type RedisErrorLogger struct {
redisStorage *beeorm.RedisCache
slackService *slackapi.SlackAPI
appService *app.App
}
func NewRedisErrorLogger(appService *app.App, ormService *beeorm.Engine, slackService *slackapi.SlackAPI) ErrorLogger {
return &RedisErrorLogger{redisStorage: ormService.GetRedis(), slackService: slackService, appService: appService}
}
func (e *RedisErrorLogger) LogError(errData interface{}) {
e.log(errData, nil)
}
func (e *RedisErrorLogger) LogErrorWithRequest(c *gin.Context, errData interface{}) {
e.log(errData, c.Request)
}
func (e *RedisErrorLogger) log(errData interface{}, request *http.Request) {
var msg string
err, ok := errData.(error)
if ok {
msg = err.Error()
} else {
msg = errData.(string)
}
logger := log.New(os.Stderr, "\n\n\x1b[31m", log.LstdFlags)
stack := stack(0)
logger.Printf("[Error]:\n%s\n%s%s", msg, stack, "\033[0m")
_, file, line, _ := runtime.Caller(4)
//nolint
errorKeyBinary := md5.Sum([]byte(e.appService.Name + ":" + file + ":" + fmt.Sprint(line)))
errorKey := hex.EncodeToString(errorKeyBinary[:])
value := &ErrorMessage{
File: file,
Line: line,
AppName: e.appService.Name,
Message: msg,
Stack: stack,
}
if request != nil {
binaryRequest, _ := httputil.DumpRequest(request, true)
if len(binaryRequest) > 2000 {
value.Request = binaryRequest[0:2000]
} else {
value.Request = binaryRequest
}
}
marshalValue, err := json.Marshal(value)
if err != nil {
panic(err)
}
e.redisStorage.HSet(GroupError, errorKey, marshalValue)
e.redisStorage.HSet(GroupError, errorKey+":time", time.Now().Unix())
counter := e.redisStorage.HIncrBy(GroupError, errorKey+":counter", 1)
logg := math.Log10(float64(counter))
if (e.slackService != nil && e.appService.IsInProdMode() || e.appService.IsInDemoMode()) && logg == float64(int64(logg)) {
_ = e.slackService.SendToChannel(
e.slackService.GetErrorChannel(),
value.Message,
slack.MsgOptionAttachments(
slack.Attachment{
AuthorName: e.appService.Name,
Title: "Error link",
TitleLink: e.slackService.GetDevPanelURL() + "#err-" + errorKey,
Text: "Counter: " + fmt.Sprint(counter) + " ENV: " + e.appService.Mode,
},
),
)
}
}
func stack(skip int) []byte {
buf := new(bytes.Buffer)
var lines [][]byte
var lastFile string
for i := skip; ; i++ {
pc, file, line, ok := runtime.Caller(i)
if !ok {
break
}
_, _ = fmt.Fprintf(buf, "%s:%d (0x%x)\n", file, line, pc)
if file != lastFile {
data, err := ioutil.ReadFile(file)
if err != nil {
continue
}
lines = bytes.Split(data, []byte{'\n'})
lastFile = file
}
_, _ = fmt.Fprintf(buf, "\t%s: %s\n", function(pc), source(lines, line))
}
return buf.Bytes()
}
func source(lines [][]byte, n int) []byte {
n--
if n < 0 || n >= len(lines) {
return dunno
}
return bytes.TrimSpace(lines[n])
}
func function(pc uintptr) []byte {
fn := runtime.FuncForPC(pc)
if fn == nil {
return dunno
}
name := []byte(fn.Name())
if lastSlash := bytes.LastIndex(name, slash); lastSlash >= 0 {
name = name[lastSlash+1:]
}
if period := bytes.Index(name, dot); period >= 0 {
name = name[period+1:]
}
name = bytes.Replace(name, centerDot, dot, -1)
return name
}