81 lines
1.7 KiB
Go
81 lines
1.7 KiB
Go
// Copyright (C) 2022 The pages authors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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package git
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import (
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"io/fs"
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"net/http"
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"os"
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"sync"
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"github.com/go-git/go-billy/v5"
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)
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// HTTP translates a billy.Filesystem into an http.FileSystem that can be used with the http.FileServer.
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func HTTP(fs billy.Filesystem) http.FileSystem {
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return http.FS(&httpFS{fs: fs})
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}
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type httpFS struct {
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fs billy.Filesystem
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}
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func (f *httpFS) Open(name string) (fs.File, error) {
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fileInfo, err := f.fs.Stat(name)
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if err != nil {
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return nil, err
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}
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return &httpFile{
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once: sync.Once{},
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fs: f.fs,
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name: name,
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fileInfo: fileInfo,
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}, nil
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}
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type httpFile struct {
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once sync.Once
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fs billy.Filesystem
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name string
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fileInfo os.FileInfo
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file billy.File
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}
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func (f *httpFile) Stat() (fs.FileInfo, error) {
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return f.fileInfo, nil
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}
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func (f *httpFile) init() {
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f.file, _ = f.fs.Open(f.name)
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}
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func (f *httpFile) Read(bytes []byte) (int, error) {
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f.once.Do(f.init)
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return f.file.Read(bytes)
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}
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func (f *httpFile) Close() error {
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if f.file != nil {
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return f.file.Close()
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}
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return nil
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}
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