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hitch_requestlogger.go
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hitch_requestlogger.go
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package requestlogger
import (
"fmt"
"log"
"net/http"
"time"
"github.com/agtorre/gocolorize"
)
// Creates a request logger middleware.
//
// The l parameter defines a logger to use. If l is nil, then the standard logger will be used.
func HitchRequestLogger(l *log.Logger) func(http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var start, end int64
start = time.Now().UnixNano()
path := r.URL.Path
rw := &requestLoggerResponseWriter{
ResponseWriter: w,
code: http.StatusOK,
}
next.ServeHTTP(rw, r)
end = time.Now().UnixNano()
duration := end - start
time := ""
if duration >= 1000000000 {
time = fmt.Sprintf("%.2fs", float64(duration)/1000000000)
} else if duration >= 1000000 {
time = fmt.Sprintf("%.2fms", float64(duration)/1000000)
} else if duration >= 1000 {
time = fmt.Sprintf("%.2fµs", float64(duration)/1000)
} else {
time = fmt.Sprintf("%ldns", duration)
}
httpCode := rw.GetCode()
code := fmt.Sprintf("%d", httpCode)
if httpCode >= 100 && httpCode <= 199 {
code = gocolorize.NewColor("black+b:white").Paint(code)
} else if httpCode >= 200 && httpCode <= 299 {
code = gocolorize.NewColor("white+b:green").Paint(code)
} else if httpCode >= 300 && httpCode <= 399 {
code = gocolorize.NewColor("white+b:blue").Paint(code)
} else if httpCode >= 400 && httpCode <= 499 {
code = gocolorize.NewColor("white+b:yellow").Paint(code)
} else if httpCode >= 500 && httpCode <= 599 {
code = gocolorize.NewColor("white+b:red").Paint(code)
}
if l == nil {
log.Printf("%s\t%s\t%s\t%s\n", gocolorize.NewColor("cyan").Paint(r.Method), gocolorize.NewColor("blue").Paint(path), code, time)
} else {
l.Printf("%s\t%s\t%s\t%s\n", gocolorize.NewColor("cyan").Paint(r.Method), gocolorize.NewColor("blue").Paint(path), code, time)
}
})
}
}
var _ http.ResponseWriter = &requestLoggerResponseWriter{}
type requestLoggerResponseWriter struct {
http.ResponseWriter
code int
}
func (rw *requestLoggerResponseWriter) WriteHeader(code int) {
rw.code = code
rw.ResponseWriter.WriteHeader(code)
}
func (rw *requestLoggerResponseWriter) GetCode() int {
return rw.code
}