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