-
Notifications
You must be signed in to change notification settings - Fork 492
/
profile.go
134 lines (116 loc) · 3.34 KB
/
profile.go
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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
/*
* Copyright (c) 2017, MegaEase
* All rights reserved.
*
* 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 api
import (
"fmt"
"gopkg.in/yaml.v2"
"net/http"
)
const (
// ProfilePrefix is the URL prefix of profile APIs
ProfilePrefix = "/profile"
// StartAction is the URL for starting profiling
StartAction = "start"
// StopAction is the URL for stopping profiling
StopAction = "stop"
)
type (
// ProfileStatusResponse contains cpu and memory profile file paths
ProfileStatusResponse struct {
CPUPath string `yaml:"cpuPath"`
MemoryPath string `yaml:"memoryPath"`
}
// StartProfilingRequest contains file path to profile file
StartProfilingRequest struct {
Path string `yaml:"path"`
}
)
func (s *Server) profileAPIEntries() []*Entry {
return []*Entry{
{
Path: ProfilePrefix,
Method: http.MethodGet,
Handler: s.getProfileStatus,
},
{
Path: fmt.Sprintf("%s/%s/cpu", ProfilePrefix, StartAction),
Method: http.MethodPost,
Handler: s.startCPUProfile,
},
{
Path: fmt.Sprintf("%s/%s/memory", ProfilePrefix, StartAction),
Method: http.MethodPost,
Handler: s.startMemoryProfile,
},
{
Path: fmt.Sprintf("%s/%s", ProfilePrefix, StopAction),
Method: http.MethodPost,
Handler: s.stopProfile,
},
}
}
func (s *Server) getProfileStatus(w http.ResponseWriter, r *http.Request) {
cpuFile := s.profile.CPUFileName()
memFile := s.profile.MemoryFileName()
result := &ProfileStatusResponse{CPUPath: cpuFile, MemoryPath: memFile}
w.Header().Set("Content-Type", "text/vnd.yaml")
err := yaml.NewEncoder(w).Encode(result)
if err != nil {
panic(err)
}
}
func (s *Server) startCPUProfile(w http.ResponseWriter, r *http.Request) {
spr := StartProfilingRequest{}
err := yaml.NewDecoder(r.Body).Decode(&spr)
if err != nil {
HandleAPIError(w, r, http.StatusBadRequest, fmt.Errorf("bad request"))
return
}
if spr.Path == "" {
HandleAPIError(w, r, http.StatusBadRequest, fmt.Errorf("missing path"))
return
}
s.profile.Lock()
defer s.profile.Unlock()
err = s.profile.UpdateCPUProfile(spr.Path)
if err != nil {
HandleAPIError(w, r, http.StatusBadRequest, fmt.Errorf(err.Error()))
return
}
}
func (s *Server) startMemoryProfile(w http.ResponseWriter, r *http.Request) {
spr := StartProfilingRequest{}
err := yaml.NewDecoder(r.Body).Decode(&spr)
if err != nil {
HandleAPIError(w, r, http.StatusBadRequest, fmt.Errorf("bad request"))
return
}
if spr.Path == "" {
HandleAPIError(w, r, http.StatusBadRequest, fmt.Errorf("missing path"))
return
}
s.profile.Lock()
defer s.profile.Unlock()
// Memory profile is flushed only at stop/exit
s.profile.UpdateMemoryProfile(spr.Path)
}
func (s *Server) stopProfile(w http.ResponseWriter, r *http.Request) {
s.profile.Lock()
defer s.profile.Unlock()
s.profile.StopCPUProfile()
s.profile.StopMemoryProfile(s.profile.MemoryFileName())
}