1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// Copyright 2014 The Prometheus Authors
// 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 handler
import (
"net/http"
"sync"
"time"
"github.com/julienschmidt/httprouter"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/pushgateway/storage"
)
// Delete returns a handler that accepts delete requests.
//
// The returned handler is already instrumented for Prometheus.
func Delete(ms storage.MetricStore) func(http.ResponseWriter, *http.Request, httprouter.Params) {
var ps httprouter.Params
var mtx sync.Mutex // Protects ps.
instrumentedHandlerFunc := prometheus.InstrumentHandlerFunc(
"delete",
func(w http.ResponseWriter, _ *http.Request) {
job := ps.ByName("job")
labelsString := ps.ByName("labels")
mtx.Unlock()
labels, err := splitLabels(labelsString)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
if job == "" {
http.Error(w, "job name is required", http.StatusBadRequest)
return
}
labels["job"] = job
ms.SubmitWriteRequest(storage.WriteRequest{
Labels: labels,
Timestamp: time.Now(),
})
w.WriteHeader(http.StatusAccepted)
},
)
return func(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
mtx.Lock()
ps = params
instrumentedHandlerFunc(w, r)
}
}
// LegacyDelete returns a handler that accepts delete requests. It deals with
// the deprecated API.
//
// The returned handler is already instrumented for Prometheus.
func LegacyDelete(ms storage.MetricStore) func(http.ResponseWriter, *http.Request, httprouter.Params) {
var ps httprouter.Params
var mtx sync.Mutex // Protects ps.
instrumentedHandlerFunc := prometheus.InstrumentHandlerFunc(
"delete",
func(w http.ResponseWriter, _ *http.Request) {
job := ps.ByName("job")
instance := ps.ByName("instance")
mtx.Unlock()
if job == "" {
http.Error(w, "job name is required", http.StatusBadRequest)
return
}
labels := map[string]string{"job": job}
if instance != "" {
labels["instance"] = instance
}
ms.SubmitWriteRequest(storage.WriteRequest{
Labels: labels,
Timestamp: time.Now(),
})
w.WriteHeader(http.StatusAccepted)
},
)
return func(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
mtx.Lock()
ps = params
instrumentedHandlerFunc(w, r)
}
}
|
