github.com/go-kivik/kivik/v4@v4.3.2/x/kivikd/logger.go (about)

     1  // Licensed under the Apache License, Version 2.0 (the "License"); you may not
     2  // use this file except in compliance with the License. You may obtain a copy of
     3  // the License at
     4  //
     5  //  http://www.apache.org/licenses/LICENSE-2.0
     6  //
     7  // Unless required by applicable law or agreed to in writing, software
     8  // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
     9  // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    10  // License for the specific language governing permissions and limitations under
    11  // the License.
    12  
    13  //go:build !js
    14  
    15  package kivikd
    16  
    17  import (
    18  	"net/http"
    19  	"time"
    20  
    21  	"github.com/go-kivik/kivik/v4/x/kivikd/logger"
    22  )
    23  
    24  type statusWriter struct {
    25  	http.ResponseWriter
    26  	status    int
    27  	byteCount int
    28  }
    29  
    30  func (w *statusWriter) WriteHeader(status int) {
    31  	w.status = status
    32  	w.ResponseWriter.WriteHeader(status)
    33  }
    34  
    35  func (w *statusWriter) Write(b []byte) (int, error) {
    36  	n, err := w.ResponseWriter.Write(b)
    37  	w.byteCount += n
    38  	return n, err
    39  }
    40  
    41  func loggerMiddleware(rlog logger.RequestLogger) func(http.Handler) http.Handler {
    42  	return func(next http.Handler) http.Handler {
    43  		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    44  			start := time.Now()
    45  			sw := &statusWriter{ResponseWriter: w}
    46  			next.ServeHTTP(sw, r)
    47  			session := MustGetSession(r.Context())
    48  			var username string
    49  			if session.User != nil {
    50  				username = session.User.Name
    51  			}
    52  			fields := logger.Fields{
    53  				logger.FieldUsername:     username,
    54  				logger.FieldTimestamp:    start,
    55  				logger.FieldElapsedTime:  time.Since(start),
    56  				logger.FieldResponseSize: sw.byteCount,
    57  			}
    58  			rlog.Log(r, sw.status, fields)
    59  		})
    60  	}
    61  }