clawbot
f8ce8cef83
The template's files at a77fd30, without its history or LICENSE, after script/rename simplexcalc. Model: opus-5-5
49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
package server
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import (
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"io/fs"
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"net/http"
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)
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// filesOnly wraps an http.FileSystem so that directories do not exist as
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// far as http.FileServer is concerned. FileServer asks the filesystem for
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// the directory first and generates its index from what it gets back;
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// refusing the Open is therefore the whole control, and it leaves the
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// path handling, content sniffing and range support of FileServer intact.
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//
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// Enumerating what a binary ships is a capability no caller needs, and
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// the embedded set grows as a project seeded from this template adds to
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// it.
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type filesOnly struct {
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inner http.FileSystem
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}
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// Open serves a file and refuses a directory with fs.ErrNotExist, which
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// http.FileServer maps to 404 — the same answer a path that is not
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// embedded at all gets.
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func (f filesOnly) Open(name string) (http.File, error) {
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file, err := f.inner.Open(name)
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if err != nil {
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// Unwrapped on purpose: http.FileServer inspects this error,
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// and wrapping hides fs.ErrNotExist from it.
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//nolint:wrapcheck // see above.
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return nil, err
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}
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info, err := file.Stat()
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if err != nil {
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_ = file.Close()
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//nolint:wrapcheck // as above.
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return nil, err
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}
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if info.IsDir() {
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_ = file.Close()
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return nil, fs.ErrNotExist
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}
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return file, nil
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}
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