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78 lines
1.7 KiB
Go
78 lines
1.7 KiB
Go
package middlewares
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import (
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"embed"
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"github.com/gin-gonic/gin"
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"net/http"
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"path"
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"strings"
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)
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const INDEX = "index.html"
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type ServeFileSystem interface {
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http.FileSystem
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Exists(prefix string, path string) bool
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}
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type EmbedFileSystem struct {
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http.FileSystem
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root string
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indexes bool
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}
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func (em *EmbedFileSystem) Open(name string) (http.File, error) {
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return em.FileSystem.Open(path.Join(em.root, name))
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}
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func EmbedFile(root string, fs *embed.FS, indexes bool) *EmbedFileSystem {
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return &EmbedFileSystem{
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FileSystem: http.FS(fs),
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root: root,
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indexes: indexes,
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}
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}
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func (em *EmbedFileSystem) Exists(prefix string, filepath string) bool {
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if p := strings.TrimPrefix(filepath, prefix); len(p) < len(filepath) {
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file, err := em.Open(p)
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if err != nil {
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return false
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}
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if stats, err := file.Stat(); err != nil {
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return false
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} else {
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if !em.indexes {
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if stats.IsDir() {
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index := path.Join(p, INDEX)
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if indexFile, err := em.Open(index); err != nil {
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return false
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} else if _, err = indexFile.Stat(); err != nil {
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return false
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}
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}
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}
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return true
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}
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}
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return false
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}
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func ServeRoot(urlPrefix, root string, resource *embed.FS) gin.HandlerFunc {
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return Serve(urlPrefix, EmbedFile(root, resource, false))
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}
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// Serve Static returns a middleware handler that serves static files in the given directory.
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func Serve(urlPrefix string, fs ServeFileSystem) gin.HandlerFunc {
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fileserver := http.FileServer(fs)
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if urlPrefix != "" {
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fileserver = http.StripPrefix(urlPrefix, fileserver)
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}
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return func(c *gin.Context) {
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if fs.Exists(urlPrefix, c.Request.URL.Path) {
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fileserver.ServeHTTP(c.Writer, c.Request)
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c.Abort()
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}
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}
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}
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