68 lines
1.5 KiB
Go
68 lines
1.5 KiB
Go
package urlrewrite
|
|
|
|
import (
|
|
"context"
|
|
"net/http"
|
|
"path"
|
|
"strings"
|
|
|
|
"github.com/traefik/traefik/v3/pkg/config/dynamic"
|
|
"github.com/traefik/traefik/v3/pkg/middlewares"
|
|
"go.opentelemetry.io/otel/trace"
|
|
)
|
|
|
|
const (
|
|
typeName = "URLRewrite"
|
|
)
|
|
|
|
type urlRewrite struct {
|
|
name string
|
|
next http.Handler
|
|
|
|
hostname *string
|
|
path *string
|
|
pathPrefix *string
|
|
}
|
|
|
|
// NewURLRewrite creates a URL rewrite middleware.
|
|
func NewURLRewrite(ctx context.Context, next http.Handler, conf dynamic.URLRewrite, name string) http.Handler {
|
|
logger := middlewares.GetLogger(ctx, name, typeName)
|
|
logger.Debug().Msg("Creating middleware")
|
|
|
|
return urlRewrite{
|
|
name: name,
|
|
next: next,
|
|
hostname: conf.Hostname,
|
|
path: conf.Path,
|
|
pathPrefix: conf.PathPrefix,
|
|
}
|
|
}
|
|
|
|
func (u urlRewrite) GetTracingInformation() (string, string, trace.SpanKind) {
|
|
return u.name, typeName, trace.SpanKindInternal
|
|
}
|
|
|
|
func (u urlRewrite) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
|
|
newPath := req.URL.Path
|
|
if u.path != nil && u.pathPrefix == nil {
|
|
newPath = *u.path
|
|
}
|
|
if u.path != nil && u.pathPrefix != nil {
|
|
newPath = path.Join(*u.path, strings.TrimPrefix(req.URL.Path, *u.pathPrefix))
|
|
|
|
// add the trailing slash if needed, as path.Join removes trailing slashes.
|
|
if strings.HasSuffix(req.URL.Path, "/") && !strings.HasSuffix(newPath, "/") {
|
|
newPath += "/"
|
|
}
|
|
}
|
|
|
|
req.URL.Path = newPath
|
|
req.URL.RawPath = req.URL.EscapedPath()
|
|
req.RequestURI = req.URL.RequestURI()
|
|
|
|
if u.hostname != nil {
|
|
req.Host = *u.hostname
|
|
}
|
|
|
|
u.next.ServeHTTP(rw, req)
|
|
}
|