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
|
package middleware
import (
"bytes"
"log"
"net/http"
"time"
"github.com/zenazn/goji/web"
"github.com/zenazn/goji/web/mutil"
)
// Logger is a middleware that logs the start and end of each request, along
// with some useful data about what was requested, what the response status was,
// and how long it took to return. When standard output is a TTY, Logger will
// print in color, otherwise it will print in black and white.
//
// Logger prints a request ID if one is provided.
//
// Logger has been designed explicitly to be Good Enough for use in small
// applications and for people just getting started with Goji. It is expected
// that applications will eventually outgrow this middleware and replace it with
// a custom request logger, such as one that produces machine-parseable output,
// outputs logs to a different service (e.g., syslog), or formats lines like
// those printed elsewhere in the application.
func Logger(c *web.C, h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
reqID := GetReqID(*c)
printStart(reqID, r)
lw := mutil.WrapWriter(w)
t1 := time.Now()
h.ServeHTTP(lw, r)
if lw.Status() == 0 {
lw.WriteHeader(http.StatusOK)
}
t2 := time.Now()
printEnd(reqID, lw, t2.Sub(t1))
}
return http.HandlerFunc(fn)
}
func printStart(reqID string, r *http.Request) {
var buf bytes.Buffer
if reqID != "" {
cW(&buf, bBlack, "[%s] ", reqID)
}
buf.WriteString("Started ")
cW(&buf, bMagenta, "%s ", r.Method)
cW(&buf, nBlue, "%q ", r.URL.String())
buf.WriteString("from ")
buf.WriteString(r.RemoteAddr)
log.Print(buf.String())
}
func printEnd(reqID string, w mutil.WriterProxy, dt time.Duration) {
var buf bytes.Buffer
if reqID != "" {
cW(&buf, bBlack, "[%s] ", reqID)
}
buf.WriteString("Returning ")
status := w.Status()
if status < 200 {
cW(&buf, bBlue, "%03d", status)
} else if status < 300 {
cW(&buf, bGreen, "%03d", status)
} else if status < 400 {
cW(&buf, bCyan, "%03d", status)
} else if status < 500 {
cW(&buf, bYellow, "%03d", status)
} else {
cW(&buf, bRed, "%03d", status)
}
buf.WriteString(" in ")
if dt < 500*time.Millisecond {
cW(&buf, nGreen, "%s", dt)
} else if dt < 5*time.Second {
cW(&buf, nYellow, "%s", dt)
} else {
cW(&buf, nRed, "%s", dt)
}
log.Print(buf.String())
}
|
