41 lines
998 B
Go
41 lines
998 B
Go
package main
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import (
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"context"
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"log"
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"net/http"
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)
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type key int
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const requestIDKey key = 0
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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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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.Println(requestID, r.Method, r.URL.Path, r.RemoteAddr, r.UserAgent())
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}()
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next.ServeHTTP(w, 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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