traefik/pkg/middlewares/replacepath/replace_path.go
2024-01-08 09:10:06 +01:00

63 lines
1.6 KiB
Go

package replacepath
import (
"context"
"net/http"
"net/url"
"github.com/traefik/traefik/v3/pkg/config/dynamic"
"github.com/traefik/traefik/v3/pkg/middlewares"
"github.com/traefik/traefik/v3/pkg/tracing"
"go.opentelemetry.io/otel/trace"
)
const (
// ReplacedPathHeader is the default header to set the old path to.
ReplacedPathHeader = "X-Replaced-Path"
typeName = "ReplacePath"
)
// ReplacePath is a middleware used to replace the path of a URL request.
type replacePath struct {
next http.Handler
path string
name string
}
// New creates a new replace path middleware.
func New(ctx context.Context, next http.Handler, config dynamic.ReplacePath, name string) (http.Handler, error) {
middlewares.GetLogger(ctx, name, typeName).Debug().Msg("Creating middleware")
return &replacePath{
next: next,
path: config.Path,
name: name,
}, nil
}
func (r *replacePath) GetTracingInformation() (string, string, trace.SpanKind) {
return r.name, typeName, trace.SpanKindInternal
}
func (r *replacePath) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
currentPath := req.URL.RawPath
if currentPath == "" {
currentPath = req.URL.EscapedPath()
}
req.Header.Add(ReplacedPathHeader, currentPath)
req.URL.RawPath = r.path
var err error
req.URL.Path, err = url.PathUnescape(req.URL.RawPath)
if err != nil {
middlewares.GetLogger(context.Background(), r.name, typeName).Error().Err(err).Send()
tracing.SetStatusErrorf(req.Context(), err.Error())
http.Error(rw, err.Error(), http.StatusInternalServerError)
return
}
req.RequestURI = req.URL.RequestURI()
r.next.ServeHTTP(rw, req)
}