Use static assets for HTML templates
- implement custom http.Filesystem boardvoting.AssetFS - replace "footer" and "header" with "footer.html" and "header.html" - change renderTemplate to use Assets - use boardvoting.GetAssetFS() with http.Fileserverdebian
parent
4dd5e09820
commit
94dcb5bd75
@ -1,3 +1,143 @@
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package boardvoting
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//go:generate go-bindata -pkg $GOPACKAGE -o assets.go ./migrations/... ./static/... ./templates/...
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import (
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"bytes"
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"errors"
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"io"
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"io/ioutil"
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"net/http"
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"os"
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"path/filepath"
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"strings"
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"time"
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)
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var defaultFileTimestamp = time.Now()
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type AssetFS struct {
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Asset func(path string) ([]byte, error)
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AssetDir func(path string) ([]string, error)
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AssetInfo func(path string) (os.FileInfo, error)
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}
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type FakeFile struct {
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Path string
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Dir bool
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Len int64
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Timestamp time.Time
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}
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func (f *FakeFile) Name() string {
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_, name := filepath.Split(f.Path)
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return name
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}
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func (f *FakeFile) Size() int64 { return f.Len }
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func (f *FakeFile) Mode() os.FileMode {
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mode := os.FileMode(0644)
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if f.Dir {
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return mode | os.ModeDir
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}
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return mode
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}
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func (f *FakeFile) ModTime() time.Time { return f.Timestamp }
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func (f *FakeFile) IsDir() bool { return f.Dir }
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func (f *FakeFile) Sys() interface{} { return nil }
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type AssetFile struct {
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*bytes.Reader
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io.Closer
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FakeFile
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}
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func NewAssetFile(name string, content []byte, timestamp time.Time) *AssetFile {
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if timestamp.IsZero() {
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timestamp = defaultFileTimestamp
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}
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return &AssetFile{
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bytes.NewReader(content),
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ioutil.NopCloser(nil),
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FakeFile{name, false, int64(len(content)), timestamp},
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}
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}
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func (f *AssetFile) Readdir(count int) ([]os.FileInfo, error) {
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return nil, errors.New("not a directory")
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}
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func (f *AssetFile) Size() int64 {
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return f.FakeFile.Size()
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}
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func (f *AssetFile) Stat() (os.FileInfo, error) {
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return f, nil
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}
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type AssetDirectory struct {
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AssetFile
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ChildrenRead int
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Children []os.FileInfo
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}
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func (f *AssetDirectory) Readdir(count int) ([]os.FileInfo, error) {
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if count <= 0 {
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return f.Children, nil
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}
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if f.ChildrenRead+count > len(f.Children) {
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count = len(f.Children) - f.ChildrenRead
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}
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rv := f.Children[f.ChildrenRead : f.ChildrenRead+count]
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f.ChildrenRead += count
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return rv, nil
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}
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func (f *AssetDirectory) Stat() (os.FileInfo, error) {
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return f, nil
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}
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func NewAssetDirectory(name string, children []string, fs *AssetFS) *AssetDirectory {
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fileInfos := make([]os.FileInfo, 0, len(children))
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for _, child := range children {
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_, err := fs.AssetDir(filepath.Join(name, child))
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fileInfos = append(fileInfos, &FakeFile{child, err == nil, 0, time.Time{}})
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}
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return &AssetDirectory{
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AssetFile{
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bytes.NewReader(nil),
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ioutil.NopCloser(nil),
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FakeFile{name, true, 0, time.Time{}},
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},
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0,
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fileInfos}
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}
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func (f *AssetFS) Open(name string) (http.File, error) {
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if len(name) > 0 && name[0] == '/' {
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name = name[1:]
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}
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if b, err := f.Asset(name); err == nil {
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timestamp := defaultFileTimestamp
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if f.AssetInfo != nil {
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if info, err := f.AssetInfo(name); err == nil {
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timestamp = info.ModTime()
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}
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}
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return NewAssetFile(name, b, timestamp), nil
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}
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if children, err := f.AssetDir(name); err == nil {
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return NewAssetDirectory(name, children, f), nil
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} else {
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if strings.Contains(err.Error(), "not found") {
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return nil, os.ErrNotExist
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}
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return nil, err
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}
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}
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func GetAssetFS() *AssetFS {
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return &AssetFS{Asset: Asset, AssetDir: AssetDir, AssetInfo: AssetInfo}
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}
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