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request_logger.go
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request_logger.go
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package middleware
import (
"bytes"
"fmt"
"io/ioutil"
"strconv"
"time"
"github.com/8treenet/freedom"
"github.com/8treenet/iris/v12/context"
"github.com/kataras/golog"
)
// NewRequestLogger .
// Request the log.
// The name of the incoming trace, taken out of HTTP Header.
func NewRequestLogger(traceIDName string, loggerConf ...*RequestLoggerConfig) func(context.Context) {
l := DefaultLoggerConfig()
if len(loggerConf) > 0 {
l = loggerConf[0]
}
l.traceName = traceIDName
return newRequestLogger(l)
}
type requestLoggerMiddleware struct {
config *RequestLoggerConfig
}
// newRequestLogger .
func newRequestLogger(cfg *RequestLoggerConfig) context.Handler {
l := &requestLoggerMiddleware{config: cfg}
return l.ServeHTTP
}
// Serve serves the middleware
func (l *requestLoggerMiddleware) ServeHTTP(ctx context.Context) {
// all except latency to string
var status, method, path string
var latency time.Duration
var startTime, endTime time.Time
startTime = time.Now()
var reqBodyBys []byte
if l.config.RequestRawBody {
reqBodyBys, _ = ioutil.ReadAll(ctx.Request().Body)
ctx.Request().Body.Close() // must close
ctx.Request().Body = ioutil.NopCloser(bytes.NewBuffer(reqBodyBys))
}
work := freedom.ToWorker(ctx)
freelog := NewLogger(l.config.traceName, work.Bus().Get(l.config.traceName))
for _, level := range l.config.CallerWithLevel {
freelog.SetCallerLevel(level)
}
work.SetLogger(freelog)
rawQuery := ctx.Request().URL.Query()
ctx.Next()
if !work.IsDeferRecycle() {
loggerPool.Put(freelog)
}
// no time.Since in order to format it well after
endTime = time.Now()
latency = endTime.Sub(startTime)
status = strconv.Itoa(ctx.GetStatusCode())
method = ctx.Method()
path = ctx.Path()
fieldsMessage := golog.Fields{}
if l.config.IP {
fieldsMessage["ip"] = ctx.RemoteAddr()
}
if headerKeys := l.config.MessageHeaderKeys; len(headerKeys) > 0 {
header := ctx.Request().Header
for _, key := range headerKeys {
header.Get(key)
msg := header.Get(key)
if msg == "" {
continue
}
fieldsMessage[key] = msg
}
}
bus := freedom.ToWorker(ctx).Bus()
traceInfo := bus.Get(l.config.traceName)
if traceInfo != "" {
fieldsMessage[l.config.traceName] = traceInfo
}
reqBodyBysLen := len(reqBodyBys)
if l.config.RequestRawBody && reqBodyBysLen > 0 {
if reqBodyBysLen > l.config.RequestRawBodyMaxLen {
reqBodyBysLen = l.config.RequestRawBodyMaxLen
}
reqBodyBys = reqBodyBys[0:reqBodyBysLen]
msg := string(reqBodyBys)
if msg != "" {
fieldsMessage["request"] = msg
}
}
if ctxKeys := l.config.MessageContextKeys; len(ctxKeys) > 0 {
for _, key := range ctxKeys {
msg := ctx.Values().Get(key)
if msg == nil {
continue
}
fieldsMessage[key] = fmt.Sprint(msg)
}
}
fieldsMessage["status"] = status
fieldsMessage["latency"] = fmt.Sprint(latency)
fieldsMessage["method"] = method
fieldsMessage["path"] = path
if len(rawQuery) > 0 && l.config.Query {
fieldsMessage["query"] = rawQuery.Encode()
}
ctx.Application().Logger().Info(l.config.Title, fieldsMessage)
}