42 lines
889 B
Go
42 lines
889 B
Go
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package routing
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import (
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"errors"
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"net/http"
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"path/filepath"
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)
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type LayeredHandler struct {
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layers []http.FileSystem
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}
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func (l *LayeredHandler) AddHandlers(layers ...http.FileSystem) {
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l.layers = append(l.layers, layers...)
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}
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func (l LayeredHandler) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
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_, fileName := filepath.Split(request.URL.Path)
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f, err := l.selectLayer(request.URL.Path)
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if err != nil {
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writer.WriteHeader(404)
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return
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}
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defer f.Close()
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stat, err := f.Stat()
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if err != nil {
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writer.WriteHeader(500)
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return
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}
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http.ServeContent(writer, request, fileName, stat.ModTime(), f)
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}
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func (l LayeredHandler) selectLayer(requestedFilePath string) (f http.File, err error) {
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for idx := range l.layers {
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layer := l.layers[idx]
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if f, err = layer.Open(requestedFilePath); err == nil {
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return
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}
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}
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return nil, errors.New("not found")
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}
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