mirror of
https://github.com/caddyserver/caddy.git
synced 2025-11-03 19:17:29 -05:00
55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
// Copyright 2015 Light Code Labs, LLC
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package requestid
|
|
|
|
import (
|
|
"context"
|
|
"log"
|
|
"net/http"
|
|
|
|
"github.com/google/uuid"
|
|
"github.com/mholt/caddy/caddyhttp/httpserver"
|
|
)
|
|
|
|
// Handler is a middleware handler
|
|
type Handler struct {
|
|
Next httpserver.Handler
|
|
HeaderName string // (optional) header from which to read an existing ID
|
|
}
|
|
|
|
func (h Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error) {
|
|
var reqid uuid.UUID
|
|
|
|
uuidFromHeader := r.Header.Get(h.HeaderName)
|
|
if h.HeaderName != "" && uuidFromHeader != "" {
|
|
// use the ID in the header field if it exists
|
|
var err error
|
|
reqid, err = uuid.Parse(uuidFromHeader)
|
|
if err != nil {
|
|
log.Printf("[NOTICE] Parsing request ID from %s header: %v", h.HeaderName, err)
|
|
reqid = uuid.New()
|
|
}
|
|
} else {
|
|
// otherwise, create a new one
|
|
reqid = uuid.New()
|
|
}
|
|
|
|
// set the request ID on the context
|
|
c := context.WithValue(r.Context(), httpserver.RequestIDCtxKey, reqid.String())
|
|
r = r.WithContext(c)
|
|
|
|
return h.Next.ServeHTTP(w, r)
|
|
}
|