Jan Dittberner
26bfcc225e
- switch to structured logging - use JSON formatter - support log level and formatter configuration
108 lines
2.5 KiB
Go
108 lines
2.5 KiB
Go
/*
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Copyright 2020-2023 CAcert Inc.
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SPDX-License-Identifier: Apache-2.0
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package handlers
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import (
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"context"
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"fmt"
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"net/http"
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"sync/atomic"
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log "github.com/sirupsen/logrus"
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)
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type key int
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const (
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requestIDKey key = iota
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)
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type statusCodeInterceptor struct {
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http.ResponseWriter
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code int
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count int
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}
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func (sci *statusCodeInterceptor) WriteHeader(code int) {
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sci.code = code
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sci.ResponseWriter.WriteHeader(code)
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}
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func (sci *statusCodeInterceptor) Write(content []byte) (int, error) {
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count, err := sci.ResponseWriter.Write(content)
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sci.count += count
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if err != nil {
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return count, fmt.Errorf("could not write response: %w", err)
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}
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return count, nil
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}
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func Logging(logger *log.Logger) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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interceptor := &statusCodeInterceptor{w, http.StatusOK, 0}
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defer func() {
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requestID, ok := r.Context().Value(requestIDKey).(string)
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if !ok {
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requestID = "unknown"
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}
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logger.Infof(
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"[%s] %s \"%s %s\" %d %d \"%s\"",
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requestID,
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r.RemoteAddr,
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r.Method,
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r.URL.Path,
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interceptor.code,
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interceptor.count,
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r.UserAgent(),
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)
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}()
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next.ServeHTTP(interceptor, r)
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})
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}
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}
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func Tracing(nextRequestID func() string) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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requestID := r.Header.Get("X-Request-Id")
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if requestID == "" {
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requestID = nextRequestID()
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}
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ctx := context.WithValue(r.Context(), requestIDKey, requestID)
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w.Header().Set("X-Request-Id", requestID)
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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}
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var Healthy int32
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func NewHealthHandler() http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if atomic.LoadInt32(&Healthy) == 1 {
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w.WriteHeader(http.StatusNoContent)
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return
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}
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w.WriteHeader(http.StatusServiceUnavailable)
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})
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}
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