84 lines
1.8 KiB
Go
84 lines
1.8 KiB
Go
package handlers
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import (
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"context"
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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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return count, err
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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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