You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
114 lines
2.2 KiB
Go
114 lines
2.2 KiB
Go
package logging
|
|
|
|
import (
|
|
"bufio"
|
|
"net"
|
|
"net/http"
|
|
)
|
|
|
|
// ResponseLogger defines an interface that a responseWrite can implement to
|
|
// support the capture of the status code, the number of bytes written and
|
|
// extra log entry fields.
|
|
type ResponseLogger interface {
|
|
http.ResponseWriter
|
|
Size() int
|
|
StatusCode() int
|
|
Fields() map[string]interface{}
|
|
WithFields(map[string]interface{})
|
|
}
|
|
|
|
// NewResponseLogger wraps the given response writer with methods to capture
|
|
// the status code, the number of bytes written, and methods to add new log
|
|
// entries. It won't wrap the response writer if it's already a
|
|
// ResponseLogger.
|
|
func NewResponseLogger(w http.ResponseWriter) ResponseLogger {
|
|
if rw, ok := w.(ResponseLogger); ok {
|
|
return rw
|
|
}
|
|
return wrapLogger(w)
|
|
}
|
|
|
|
func wrapLogger(w http.ResponseWriter) (rw ResponseLogger) {
|
|
rw = &rwDefault{w, 200, 0, nil}
|
|
if f, ok := w.(http.Flusher); ok {
|
|
rw = &rwFlusher{rw, f}
|
|
}
|
|
if h, ok := w.(http.Hijacker); ok {
|
|
rw = &rwHijacker{rw, h}
|
|
}
|
|
if p, ok := w.(http.Pusher); ok {
|
|
rw = &rwPusher{rw, p}
|
|
}
|
|
return
|
|
}
|
|
|
|
type rwDefault struct {
|
|
http.ResponseWriter
|
|
code int
|
|
size int
|
|
fields map[string]interface{}
|
|
}
|
|
|
|
func (r *rwDefault) Header() http.Header {
|
|
return r.ResponseWriter.Header()
|
|
}
|
|
|
|
func (r *rwDefault) Write(p []byte) (n int, err error) {
|
|
n, err = r.ResponseWriter.Write(p)
|
|
r.size += n
|
|
return
|
|
}
|
|
|
|
func (r *rwDefault) WriteHeader(code int) {
|
|
r.ResponseWriter.WriteHeader(code)
|
|
r.code = code
|
|
}
|
|
|
|
func (r *rwDefault) Size() int {
|
|
return r.size
|
|
}
|
|
|
|
func (r *rwDefault) StatusCode() int {
|
|
return r.code
|
|
}
|
|
|
|
func (r *rwDefault) Fields() map[string]interface{} {
|
|
return r.fields
|
|
}
|
|
|
|
func (r *rwDefault) WithFields(fields map[string]interface{}) {
|
|
if r.fields == nil {
|
|
r.fields = make(map[string]interface{}, len(fields))
|
|
}
|
|
for k, v := range fields {
|
|
r.fields[k] = v
|
|
}
|
|
}
|
|
|
|
type rwFlusher struct {
|
|
ResponseLogger
|
|
f http.Flusher
|
|
}
|
|
|
|
func (r *rwFlusher) Flush() {
|
|
r.f.Flush()
|
|
}
|
|
|
|
type rwHijacker struct {
|
|
ResponseLogger
|
|
h http.Hijacker
|
|
}
|
|
|
|
func (r *rwHijacker) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
|
return r.h.Hijack()
|
|
}
|
|
|
|
type rwPusher struct {
|
|
ResponseLogger
|
|
p http.Pusher
|
|
}
|
|
|
|
func (rw *rwPusher) Push(target string, opts *http.PushOptions) error {
|
|
return rw.p.Push(target, opts)
|
|
}
|