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package caddylog
import (
"log"
"net/http"
"time"
"bitbucket.org/lightcodelabs/caddy2"
"bitbucket.org/lightcodelabs/caddy2/modules/caddyhttp"
)
func init() {
caddy2.RegisterModule(caddy2.Module{
Name: "http.middleware.log",
New: func() (interface{}, error) { return new(Log), nil },
// TODO: Examples of OnLoad and OnUnload.
OnLoad: func(instances []interface{}, priorState interface{}) (interface{}, error) {
var counter int
if priorState != nil {
counter = priorState.(int)
}
counter++
for _, inst := range instances {
logInst := inst.(*Log)
logInst.counter = counter
}
log.Println("State is now:", counter)
return counter, nil
},
OnUnload: func(state interface{}) error {
log.Println("Closing log files, state:", state)
return nil
},
})
}
// Log implements a simple logging middleware.
type Log struct {
Filename string
counter int
}
func (l *Log) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error {
start := time.Now()
// TODO: An example of returning errors
// return caddyhttp.Error(http.StatusBadRequest, fmt.Errorf("this is a basic error"))
// return caddyhttp.Error(http.StatusBadGateway, caddyhttp.HandlerError{
// Err: fmt.Errorf("this is a detailed error"),
// Message: "We had trouble doing the thing.",
// Recommendations: []string{
// "Try reconnecting the gizbop.",
// "Turn off the Internet.",
// },
// })
if err := next.ServeHTTP(w, r); err != nil {
return err
}
log.Println("latency:", time.Now().Sub(start), l.counter)
return nil
}
// Interface guard
var _ caddyhttp.MiddlewareHandler = (*Log)(nil)
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