68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
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/*
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* Copyright 2024 Jonas Kaninda
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package pkg
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import (
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"github.com/gorilla/mux"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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"net/http"
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"strconv"
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)
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type PrometheusRoute struct {
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name string
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path string
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}
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var totalRequests = prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Name: "http_requests_total",
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Help: "Number of get requests.",
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},
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[]string{"path"},
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)
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var responseStatus = prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Name: "response_status",
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Help: "Status of HTTP response",
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},
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[]string{"status"},
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)
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var httpDuration = promauto.NewHistogramVec(prometheus.HistogramOpts{
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Name: "http_response_time_seconds",
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Help: "Duration of HTTP requests.",
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}, []string{"path"})
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func prometheusMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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route := mux.CurrentRoute(r)
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path, _ := route.GetPathTemplate()
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timer := prometheus.NewTimer(httpDuration.WithLabelValues(path))
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responseStatus.WithLabelValues(strconv.Itoa(http.StatusOK)).Inc()
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totalRequests.WithLabelValues(path).Inc()
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timer.ObserveDuration()
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next.ServeHTTP(w, r)
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})
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}
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