filebrowser/filemanager.go
2016-06-11 21:20:47 +01:00

124 lines
3.2 KiB
Go

//go:generate go get github.com/jteeuwen/go-bindata
//go:generate go install github.com/jteeuwen/go-bindata/go-bindata
//go:generate go-bindata -debug -pkg filemanager -prefix "assets" -o binary.go assets/...
// TODO: remove debug from the comment
// Package filemanager provides middleware for managing files in a directory
// when directory path is requested instead of a specific file. Based on browse
// middleware.
package filemanager
import (
"mime"
"net/http"
"os"
"path/filepath"
"strings"
"github.com/mholt/caddy/caddyhttp/httpserver"
)
const assetsURL = "/_filemanagerinternal"
// FileManager is an http.Handler that can show a file listing when
// directories in the given paths are specified.
type FileManager struct {
Next httpserver.Handler
Configs []Config
}
// ServeHTTP determines if the request is for this plugin, and if all prerequisites are met.
func (f FileManager) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error) {
var (
c *Config
fi *FileInfo
code int
err error
assets bool
)
for i := range f.Configs {
if httpserver.Path(r.URL.Path).Matches(f.Configs[i].BaseURL) {
c = &f.Configs[i]
assets = httpserver.Path(r.URL.Path).Matches(c.BaseURL + assetsURL)
if r.Method != http.MethodPost && !assets {
fi, code, err = GetFileInfo(r.URL, c)
if err != nil {
return code, err
}
if fi.IsDir && !strings.HasSuffix(r.URL.Path, "/") {
http.Redirect(w, r, r.URL.Path+"/", http.StatusTemporaryRedirect)
return 0, nil
}
}
// Route the request depending on the HTTP Method
switch r.Method {
case http.MethodGet:
// Read and show directory or file
if assets {
return ServeAssets(w, r, c)
}
/* if file.Info.IsDir() {
return f.ServeListing(w, r, file.File, c)
}
return f.ServeSingleFile(w, r, file, c) */
case http.MethodPost:
// Create new file or directory
return http.StatusOK, nil
case http.MethodDelete:
// Delete a file or a directory
return fi.Delete()
case http.MethodPut:
// Update/Modify a directory or file
return http.StatusOK, nil
case http.MethodPatch:
// Rename a file or directory
return http.StatusOK, nil
default:
return http.StatusNotImplemented, nil
}
}
}
return f.Next.ServeHTTP(w, r)
}
// ErrorToHTTPCode gets the respective HTTP code for an error
func ErrorToHTTPCode(err error) int {
switch {
case os.IsPermission(err):
return http.StatusForbidden
case os.IsExist(err):
return http.StatusGone
default:
return http.StatusInternalServerError
}
}
// ServeAssets provides the needed assets for the front-end
func ServeAssets(w http.ResponseWriter, r *http.Request, c *Config) (int, error) {
// gets the filename to be used with Assets function
filename := strings.Replace(r.URL.Path, c.BaseURL+assetsURL, "public", 1)
file, err := Asset(filename)
if err != nil {
return http.StatusNotFound, nil
}
// Get the file extension and its mimetype
extension := filepath.Ext(filename)
mediatype := mime.TypeByExtension(extension)
// Write the header with the Content-Type and write the file
// content to the buffer
w.Header().Set("Content-Type", mediatype)
w.Write(file)
return 200, nil
}