72 lines
1.3 KiB
Go
72 lines
1.3 KiB
Go
package static
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import (
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"embed"
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"io/fs"
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"net/http"
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"strings"
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"git.company.lan/gopkg/gin"
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)
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type embedFileSystem struct {
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http.FileSystem
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override []Override
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}
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func (e embedFileSystem) Exists(prefix string, file string) bool {
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name := strings.TrimPrefix(file, prefix)
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if name == "" {
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name = "/"
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}
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f, err := e.Open(name)
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if err != nil {
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return false
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}
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defer f.Close()
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return true
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}
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func (e embedFileSystem) Override(c *gin.Context) bool {
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if len(e.override) > 0 {
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fn := e.override[0]
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return fn(c)
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}
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return false
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}
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func EmbedFolder(fsEmbed embed.FS, reqPath string, override ...Override) (ServeFileSystem, error) {
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targetPath := strings.TrimSpace(reqPath)
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if targetPath == "" {
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return embedFileSystem{
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FileSystem: http.FS(fsEmbed),
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override: override,
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}, nil
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}
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fsys, _ := fs.Sub(fsEmbed, targetPath)
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_, err := fsEmbed.Open(targetPath)
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if err != nil {
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return nil, err
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}
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return embedFileSystem{
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FileSystem: http.FS(fsys),
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override: override,
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}, nil
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}
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func ServeEmbed(reqPath string, fsEmbed embed.FS) gin.HandlerFunc {
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embedFS, err := EmbedFolder(fsEmbed, reqPath)
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if err != nil {
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return func(c *gin.Context) {
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c.JSON(http.StatusInternalServerError, gin.H{
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"message": "initialization of embed folder failed",
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"error": err.Error(),
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})
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}
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}
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return gin.WrapH(http.FileServer(embedFS))
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}
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