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static.go
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static.go
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package middleware
import (
"fmt"
"io"
"mime"
"net/http"
"path"
"path/filepath"
"github.com/labstack/echo"
)
type (
StaticOptions struct {
Root string `json:"root"`
Index string `json:"index"`
Browse bool `json:"browse"`
}
)
func Static(root string, options ...*StaticOptions) echo.MiddlewareFunc {
return func(next echo.Handler) echo.Handler {
// Default options
opts := new(StaticOptions)
if len(options) > 0 {
opts = options[0]
}
if opts.Index == "" {
opts.Index = "index.html"
}
return echo.HandlerFunc(func(c echo.Context) error {
fs := http.Dir(root)
file := path.Clean(c.Request().URL().Path())
f, err := fs.Open(file)
if err != nil {
return next.Handle(c)
}
defer f.Close()
fi, err := f.Stat()
if err != nil {
return err
}
if fi.IsDir() {
/* NOTE:
Not checking the Last-Modified header as it caches the response `304` when
changing differnt directories for the same path.
*/
d := f
// Index file
file = path.Join(file, opts.Index)
f, err = fs.Open(file)
if err != nil {
if opts.Browse {
dirs, err := d.Readdir(-1)
if err != nil {
return err
}
// Create a directory index
res := c.Response()
res.Header().Set(echo.ContentType, echo.TextHTMLCharsetUTF8)
if _, err = fmt.Fprintf(res, "<pre>\n"); err != nil {
return err
}
for _, d := range dirs {
name := d.Name()
color := "#212121"
if d.IsDir() {
color = "#e91e63"
name += "/"
}
if _, err = fmt.Fprintf(res, "<a href=\"%s\" style=\"color: %s;\">%s</a>\n", name, color, name); err != nil {
return err
}
}
_, err = fmt.Fprintf(res, "</pre>\n")
return err
}
return next.Handle(c)
}
fi, _ = f.Stat() // Index file stat
}
ct := mime.TypeByExtension(filepath.Ext(fi.Name()))
if ct == "" {
ct = echo.OctetStream
}
c.Response().Header().Set(echo.ContentType, ct)
c.Response().WriteHeader(http.StatusOK)
_, err = io.Copy(c.Response(), f)
return err
// TODO:
// http.ServeContent(c.Response(), c.Request(), fi.Name(), fi.ModTime(), f)
})
}
}
// Favicon serves the default favicon - GET /favicon.ico.
func Favicon() echo.HandlerFunc {
return func(c echo.Context) error {
return nil
}
}