mirror of
https://github.com/astaxie/beego.git
synced 2024-11-16 21:30:56 +00:00
75 lines
2.4 KiB
Go
75 lines
2.4 KiB
Go
// Copyright 2020 astaxie
|
|
//
|
|
// 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 metric
|
|
|
|
import (
|
|
"net/http"
|
|
"reflect"
|
|
"strconv"
|
|
"time"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
|
|
"github.com/astaxie/beego"
|
|
"github.com/astaxie/beego/logs"
|
|
)
|
|
|
|
func PrometheusMiddleWare(next http.Handler) http.Handler {
|
|
summaryVec := prometheus.NewSummaryVec(prometheus.SummaryOpts{
|
|
Name: "beego",
|
|
Subsystem: "http_request",
|
|
ConstLabels: map[string]string{
|
|
"server": beego.BConfig.ServerName,
|
|
"env": beego.BConfig.RunMode,
|
|
"appname": beego.BConfig.AppName,
|
|
},
|
|
Help: "The statics info for http request",
|
|
}, []string{"pattern", "method", "status", "duration"})
|
|
|
|
prometheus.MustRegister(summaryVec)
|
|
|
|
return http.HandlerFunc(func(writer http.ResponseWriter, q *http.Request) {
|
|
start := time.Now()
|
|
next.ServeHTTP(writer, q)
|
|
end := time.Now()
|
|
go report(end.Sub(start), writer, q, summaryVec)
|
|
})
|
|
}
|
|
|
|
func report(dur time.Duration, writer http.ResponseWriter, q *http.Request, vec *prometheus.SummaryVec) {
|
|
ctrl := beego.BeeApp.Handlers
|
|
ctx := ctrl.GetContext()
|
|
ctx.Reset(writer, q)
|
|
defer ctrl.GiveBackContext(ctx)
|
|
|
|
// We cannot read the status code from q.Response.StatusCode
|
|
// since the http server does not set q.Response. So q.Response is nil
|
|
// Thus, we use reflection to read the status from writer whose concrete type is http.response
|
|
responseVal := reflect.ValueOf(writer).Elem()
|
|
field := responseVal.FieldByName("status")
|
|
status := -1
|
|
if field.IsValid() && field.Kind() == reflect.Int {
|
|
status = int(field.Int())
|
|
}
|
|
ptn := "UNKNOWN"
|
|
if rt, found := ctrl.FindRouter(ctx); found {
|
|
ptn = rt.GetPattern()
|
|
} else {
|
|
logs.Warn("we can not find the router info for this request, so request will be recorded as UNKNOWN: " + q.URL.String())
|
|
}
|
|
ms := dur / time.Millisecond
|
|
vec.WithLabelValues(ptn, q.Method, strconv.Itoa(status), strconv.Itoa(int(ms))).Observe(float64(ms))
|
|
}
|