-
Notifications
You must be signed in to change notification settings - Fork 218
/
middleware.go
91 lines (76 loc) · 2.17 KB
/
middleware.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
// Copyright 2022 Google LLC
//
// 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 frontend
import (
"net/http"
"time"
"github.com/google/uuid"
)
type responseRecorder struct {
b int
status int
w http.ResponseWriter
}
var _ http.ResponseWriter = (*responseRecorder)(nil)
// Header implements the [http.ResponseWriter] interface.
func (r *responseRecorder) Header() http.Header {
return r.w.Header()
}
// Write implements the [http.ResponseWriter] interface.
func (r *responseRecorder) Write(p []byte) (int, error) {
if r.status == 0 {
r.status = http.StatusOK
}
n, err := r.w.Write(p)
r.b += n
return n, err
}
// WriteHeader implements the [http.ResponseWriter] interface.
func (r *responseRecorder) WriteHeader(statusCode int) {
r.status = statusCode
r.w.WriteHeader(statusCode)
}
type logHandler struct {
server *server
next http.Handler
}
var _ http.Handler = (*logHandler)(nil)
func newLogHandler(s *server, next http.Handler) http.Handler {
return &logHandler{server: s, next: next}
}
// ServeHTTP implements the [http.Handler] interface.
func (lh *logHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
requestID, err := uuid.NewRandom()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
start := time.Now()
rr := &responseRecorder{w: w}
logger := lh.server.Logger(ctx).With(
"http.req.path", r.URL.Path,
"http.req.method", r.Method,
"http.req.id", requestID)
logger.Debug("request started")
defer func() {
logger.Debug("request complete",
"duration", time.Since(start),
"status", rr.status,
"bytes", rr.b,
)
}()
r = r.WithContext(ctx)
lh.next.ServeHTTP(rr, r)
}