Improvements
This commit is contained in:
Henrique Dias
268
file/listing.go
Normal file
268
file/listing.go
Normal file
@@ -0,0 +1,268 @@
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package file
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"net/url"
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"os"
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"path"
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"sort"
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"strconv"
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"strings"
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"github.com/hacdias/caddy-filemanager/config"
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"github.com/hacdias/caddy-filemanager/page"
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"github.com/hacdias/caddy-filemanager/utils"
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"github.com/mholt/caddy/caddyhttp/httpserver"
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)
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// A Listing is the context used to fill out a template.
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type Listing struct {
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// The name of the directory (the last element of the path)
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Name string
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// The full path of the request
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Path string
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// The items (files and folders) in the path
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Items []Info
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// The number of directories in the listing
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NumDirs int
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// The number of files (items that aren't directories) in the listing
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NumFiles int
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// Which sorting order is used
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Sort string
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// And which order
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Order string
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// If ≠0 then Items have been limited to that many elements
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ItemsLimitedTo int
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httpserver.Context `json:"-"`
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}
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// handleSortOrder gets and stores for a Listing the 'sort' and 'order',
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// and reads 'limit' if given. The latter is 0 if not given. Sets cookies.
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func handleSortOrder(w http.ResponseWriter, r *http.Request, scope string) (sort string, order string, limit int, err error) {
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sort, order, limitQuery := r.URL.Query().Get("sort"), r.URL.Query().Get("order"), r.URL.Query().Get("limit")
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// If the query 'sort' or 'order' is empty, use defaults or any values previously saved in Cookies
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switch sort {
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case "":
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sort = "name"
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if sortCookie, sortErr := r.Cookie("sort"); sortErr == nil {
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sort = sortCookie.Value
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}
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case "name", "size", "type":
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http.SetCookie(w, &http.Cookie{Name: "sort", Value: sort, Path: scope, Secure: r.TLS != nil})
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}
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switch order {
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case "":
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order = "asc"
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if orderCookie, orderErr := r.Cookie("order"); orderErr == nil {
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order = orderCookie.Value
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}
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case "asc", "desc":
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http.SetCookie(w, &http.Cookie{Name: "order", Value: order, Path: scope, Secure: r.TLS != nil})
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}
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if limitQuery != "" {
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limit, err = strconv.Atoi(limitQuery)
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if err != nil { // if the 'limit' query can't be interpreted as a number, return err
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return
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}
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}
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return
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}
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// Implement sorting for Listing
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type byName Listing
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type bySize Listing
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type byTime Listing
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// By Name
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func (l byName) Len() int { return len(l.Items) }
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func (l byName) Swap(i, j int) { l.Items[i], l.Items[j] = l.Items[j], l.Items[i] }
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// Treat upper and lower case equally
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func (l byName) Less(i, j int) bool {
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if l.Items[i].IsDir() && !l.Items[j].IsDir() {
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return true
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}
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if !l.Items[i].IsDir() && l.Items[j].IsDir() {
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return false
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}
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return strings.ToLower(l.Items[i].Name()) < strings.ToLower(l.Items[j].Name())
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}
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// By Size
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func (l bySize) Len() int { return len(l.Items) }
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func (l bySize) Swap(i, j int) { l.Items[i], l.Items[j] = l.Items[j], l.Items[i] }
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const directoryOffset = -1 << 31 // = math.MinInt32
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func (l bySize) Less(i, j int) bool {
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iSize, jSize := l.Items[i].Size(), l.Items[j].Size()
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if l.Items[i].IsDir() {
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iSize = directoryOffset + iSize
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}
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if l.Items[j].IsDir() {
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jSize = directoryOffset + jSize
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}
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return iSize < jSize
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}
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// By Time
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func (l byTime) Len() int { return len(l.Items) }
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func (l byTime) Swap(i, j int) { l.Items[i], l.Items[j] = l.Items[j], l.Items[i] }
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func (l byTime) Less(i, j int) bool { return l.Items[i].ModTime().Before(l.Items[j].ModTime()) }
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// Add sorting method to "Listing"
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// it will apply what's in ".Sort" and ".Order"
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func (l Listing) applySort() {
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// Check '.Order' to know how to sort
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if l.Order == "desc" {
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switch l.Sort {
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case "name":
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sort.Sort(sort.Reverse(byName(l)))
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case "size":
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sort.Sort(sort.Reverse(bySize(l)))
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case "time":
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sort.Sort(sort.Reverse(byTime(l)))
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default:
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// If not one of the above, do nothing
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return
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}
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} else { // If we had more Orderings we could add them here
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switch l.Sort {
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case "name":
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sort.Sort(byName(l))
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case "size":
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sort.Sort(bySize(l))
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case "time":
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sort.Sort(byTime(l))
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default:
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sort.Sort(byName(l))
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return
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}
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}
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}
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func (i *Info) serveListing(w http.ResponseWriter, r *http.Request, c *config.Config, u *config.User) (int, error) {
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var err error
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file, err := u.FileSystem.OpenFile(i.VirtualPath, os.O_RDONLY, 0)
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if err != nil {
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return utils.ErrorToHTTPCode(err, true), err
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}
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defer file.Close()
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listing, err := i.loadDirectoryContents(file, r.URL.Path, u)
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if err != nil {
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fmt.Println(err)
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switch {
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case os.IsPermission(err):
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return http.StatusForbidden, err
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case os.IsExist(err):
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return http.StatusGone, err
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default:
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return http.StatusInternalServerError, err
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}
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}
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listing.Context = httpserver.Context{
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Root: http.Dir(u.Scope),
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Req: r,
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URL: r.URL,
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}
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// Copy the query values into the Listing struct
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var limit int
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listing.Sort, listing.Order, limit, err = handleSortOrder(w, r, c.Scope)
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if err != nil {
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return http.StatusBadRequest, err
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}
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listing.applySort()
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if limit > 0 && limit <= len(listing.Items) {
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listing.Items = listing.Items[:limit]
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listing.ItemsLimitedTo = limit
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}
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if strings.Contains(r.Header.Get("Accept"), "application/json") {
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marsh, err := json.Marshal(listing.Items)
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if err != nil {
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return http.StatusInternalServerError, err
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}
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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if _, err := w.Write(marsh); err != nil {
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return http.StatusInternalServerError, err
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}
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return http.StatusOK, nil
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}
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page := &page.Page{
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Info: &page.Info{
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Name: listing.Name,
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Path: i.VirtualPath,
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IsDir: true,
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User: u,
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Config: c,
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Data: listing,
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},
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}
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if r.Header.Get("Minimal") == "true" {
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page.Minimal = true
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}
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return page.PrintAsHTML(w, "listing")
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}
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func (i Info) loadDirectoryContents(file http.File, path string, u *config.User) (*Listing, error) {
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files, err := file.Readdir(-1)
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if err != nil {
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return nil, err
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}
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listing := directoryListing(files, i.VirtualPath, path, u)
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return &listing, nil
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}
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func directoryListing(files []os.FileInfo, urlPath string, basePath string, u *config.User) Listing {
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var (
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fileinfos []Info
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dirCount, fileCount int
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)
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for _, f := range files {
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name := f.Name()
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if f.IsDir() {
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name += "/"
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dirCount++
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} else {
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fileCount++
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}
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// Absolute URL
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url := url.URL{Path: basePath + name}
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fileinfos = append(fileinfos, Info{
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FileInfo: f,
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URL: url.String(),
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UserAllowed: u.Allowed(url.String()),
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})
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}
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return Listing{
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Name: path.Base(urlPath),
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Path: urlPath,
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Items: fileinfos,
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NumDirs: dirCount,
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NumFiles: fileCount,
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}
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}
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