85 lines
2.0 KiB
Go
85 lines
2.0 KiB
Go
package rewriter
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import (
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"net/http"
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proxy "forge.cadoles.com/Cadoles/go-proxy"
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"forge.cadoles.com/Cadoles/go-proxy/wildcard"
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"forge.cadoles.com/cadoles/bouncer/internal/proxy/director"
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"forge.cadoles.com/cadoles/bouncer/internal/store"
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"github.com/pkg/errors"
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"gitlab.com/wpetit/goweb/logger"
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)
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const LayerType store.LayerType = "rewriter"
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type Layer struct{}
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func (l *Layer) LayerType() store.LayerType {
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return LayerType
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}
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func (l *Layer) Middleware(layer *store.Layer) proxy.Middleware {
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return func(next http.Handler) http.Handler {
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fn := func(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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options, err := fromStoreOptions(layer.Options)
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if err != nil {
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logger.Error(ctx, "could not parse layer options", logger.E(errors.WithStack(err)))
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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return
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}
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matches := wildcard.MatchAny(r.URL.String(), options.MatchURLs...)
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if !matches {
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next.ServeHTTP(w, r)
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return
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}
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if err := l.applyRequestRules(r, options); err != nil {
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logger.Error(ctx, "could not apply request rules", logger.E(errors.WithStack(err)))
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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return
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}
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next.ServeHTTP(w, r)
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}
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return http.HandlerFunc(fn)
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}
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}
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// ResponseTransformer implements director.ResponseTransformerLayer.
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func (l *Layer) ResponseTransformer(layer *store.Layer) proxy.ResponseTransformer {
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return func(r *http.Response) error {
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options, err := fromStoreOptions(layer.Options)
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if err != nil {
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return errors.WithStack(err)
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}
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matches := wildcard.MatchAny(r.Request.URL.String(), options.MatchURLs...)
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if !matches {
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return nil
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}
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if err := l.applyResponseRules(r, options); err != nil {
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return errors.WithStack(err)
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}
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return nil
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}
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}
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func New(funcs ...OptionFunc) *Layer {
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return &Layer{}
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}
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var (
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_ director.MiddlewareLayer = &Layer{}
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_ director.ResponseTransformerLayer = &Layer{}
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)
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