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package server
import (
"fmt"
"io"
"net/http"
"github.com/pkg/errors"
)
type LoggingResponseWriter struct {
wroteHeader bool
http.ResponseWriter
statusCode int
}
func (lrw *LoggingResponseWriter) WriteHeader(code int) {
lrw.statusCode = code
if !lrw.wroteHeader {
lrw.ResponseWriter.WriteHeader(code)
lrw.wroteHeader = true
}
}
func (lrw *LoggingResponseWriter) Write(b []byte) (int, error) {
if !lrw.wroteHeader {
lrw.statusCode = http.StatusOK
lrw.wroteHeader = true
}
count, err := lrw.ResponseWriter.Write(b)
if err != nil {
return count, errors.Wrap(err, "failed to write response")
}
return count, nil
}
func NewLoggingResponseWriter(w http.ResponseWriter) *LoggingResponseWriter {
return &LoggingResponseWriter{false, w, http.StatusOK}
}
type wrappedHandlerOptions struct {
defaultHostname string
logger io.Writer
}
func wrapHandlerWithLogging(wrappedHandler http.Handler, opts wrappedHandlerOptions) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
scheme := r.Header.Get("X-Forwarded-Proto")
if scheme == "" {
scheme = "http"
}
lw := NewLoggingResponseWriter(w)
wrappedHandler.ServeHTTP(lw, r)
statusCode := lw.statusCode
fmt.Fprintf(
opts.logger,
"%s %s %d %s %s\n",
scheme,
r.Method,
statusCode,
r.URL.Path,
lw.Header().Get("Location"),
)
})
}
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