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logger.go
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logger.go
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package main
import (
"fmt"
"log"
"net/http"
"github.com/mailgun/groupcache/v2"
)
type field struct {
key string
value any
}
type logger struct {
level string
fields []field
}
func (l *logger) Error() groupcache.Logger {
return &logger{
level: "ERROR",
fields: l.fields,
}
}
func (l *logger) Warn() groupcache.Logger {
return &logger{
level: "WARN",
fields: l.fields,
}
}
func (l *logger) Info() groupcache.Logger {
return &logger{
level: "INFO",
fields: l.fields,
}
}
func (l *logger) Debug() groupcache.Logger {
return &logger{
level: "DEBUG",
fields: l.fields,
}
}
func (l *logger) ErrorField(label string, err error) groupcache.Logger {
return &logger{
level: l.level,
fields: append(l.fields, field{label, err}),
}
}
func (l *logger) StringField(label string, val string) groupcache.Logger {
return &logger{
level: l.level,
fields: append(l.fields, field{label, val}),
}
}
func (l *logger) WithFields(fields map[string]interface{}) groupcache.Logger {
res := &logger{
level: l.level,
fields: l.fields,
}
for k, v := range fields {
res.fields = append(res.fields, field{k, v})
}
return res
}
func (l *logger) Printf(format string, args ...interface{}) {
if len(l.fields) > 0 {
format += " {"
for _, v := range l.fields {
format = format + v.key + "=" + fmt.Sprint(v.value) + ","
}
format += "}"
}
format = fmt.Sprintf("[%s]", l.level) + format
log.Printf(format, args...)
}
func newLogger() *logger {
return &logger{}
}
type loggingTransport struct {
http.RoundTripper
}
func (t *loggingTransport) RoundTrip(r *http.Request) (*http.Response, error) {
log.Printf("[DEBUG] groupcache request: %v", r.URL)
return t.RoundTripper.RoundTrip(r)
}