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package staticfiles
import (
"bytes"
"encoding/json"
"html/template"
"net/http"
"os"
"path"
"strings"
"bitbucket.org/lightcodelabs/caddy2"
"bitbucket.org/lightcodelabs/caddy2/modules/caddyhttp"
)
// Browse configures directory browsing.
type Browse struct {
TemplateFile string `json:"template_file"`
template *template.Template
}
func (sf *StaticFiles) serveBrowse(dirPath string, w http.ResponseWriter, r *http.Request) error {
dir, err := sf.openFile(dirPath, w)
if err != nil {
return err
}
defer dir.Close()
repl := r.Context().Value(caddy2.ReplacerCtxKey).(caddy2.Replacer)
listing, err := sf.loadDirectoryContents(dir, r.URL.Path, repl)
switch {
case os.IsPermission(err):
return caddyhttp.Error(http.StatusForbidden, err)
case os.IsNotExist(err):
return caddyhttp.Error(http.StatusNotFound, err)
case err != nil:
return caddyhttp.Error(http.StatusInternalServerError, err)
}
sf.browseApplyQueryParams(w, r, &listing)
// write response as either JSON or HTML
var buf *bytes.Buffer
acceptHeader := strings.ToLower(strings.Join(r.Header["Accept"], ","))
if strings.Contains(acceptHeader, "application/json") {
if buf, err = sf.browseWriteJSON(listing); err != nil {
return caddyhttp.Error(http.StatusInternalServerError, err)
}
w.Header().Set("Content-Type", "application/json; charset=utf-8")
} else {
if buf, err = sf.browseWriteHTML(listing); err != nil {
return caddyhttp.Error(http.StatusInternalServerError, err)
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
}
buf.WriteTo(w)
return nil
// TODO: Sigh... do we have to put this here?
// // Browsing navigation gets messed up if browsing a directory
// // that doesn't end in "/" (which it should, anyway)
// u := *r.URL
// if u.Path == "" {
// u.Path = "/"
// }
// if u.Path[len(u.Path)-1] != '/' {
// u.Path += "/"
// http.Redirect(w, r, u.String(), http.StatusMovedPermanently)
// return http.StatusMovedPermanently, nil
// }
// return b.ServeListing(w, r, requestedFilepath, bc)
}
func (sf *StaticFiles) loadDirectoryContents(dir *os.File, urlPath string, repl caddy2.Replacer) (browseListing, error) {
files, err := dir.Readdir(-1)
if err != nil {
return browseListing{}, err
}
// determine if user can browse up another folder
curPathDir := path.Dir(strings.TrimSuffix(urlPath, "/"))
canGoUp := strings.HasPrefix(curPathDir, sf.Root)
return sf.directoryListing(files, canGoUp, urlPath, repl), nil
}
// browseApplyQueryParams applies query parameters to the listing.
// It mutates the listing and may set cookies.
func (sf *StaticFiles) browseApplyQueryParams(w http.ResponseWriter, r *http.Request, listing *browseListing) {
sortParam := r.URL.Query().Get("sort")
orderParam := r.URL.Query().Get("order")
limitParam := r.URL.Query().Get("limit")
// first figure out what to sort by
switch sortParam {
case "":
sortParam = sortByNameDirFirst
if sortCookie, sortErr := r.Cookie("sort"); sortErr == nil {
sortParam = sortCookie.Value
}
case sortByName, sortByNameDirFirst, sortBySize, sortByTime:
http.SetCookie(w, &http.Cookie{Name: "sort", Value: sortParam, Secure: r.TLS != nil})
}
// then figure out the order
switch orderParam {
case "":
orderParam = "asc"
if orderCookie, orderErr := r.Cookie("order"); orderErr == nil {
orderParam = orderCookie.Value
}
case "asc", "desc":
http.SetCookie(w, &http.Cookie{Name: "order", Value: orderParam, Secure: r.TLS != nil})
}
// finally, apply the sorting and limiting
listing.applySortAndLimit(sortParam, orderParam, limitParam)
}
func (sf *StaticFiles) browseWriteJSON(listing browseListing) (*bytes.Buffer, error) {
buf := new(bytes.Buffer)
err := json.NewEncoder(buf).Encode(listing.Items)
return buf, err
}
func (sf *StaticFiles) browseWriteHTML(listing browseListing) (*bytes.Buffer, error) {
buf := new(bytes.Buffer)
err := sf.Browse.template.Execute(buf, listing)
return buf, err
}
// isSymlink return true if f is a symbolic link
func isSymlink(f os.FileInfo) bool {
return f.Mode()&os.ModeSymlink != 0
}
// isSymlinkTargetDir return true if f's symbolic link target
// is a directory. Return false if not a symbolic link.
// TODO: Re-implement
func isSymlinkTargetDir(f os.FileInfo, urlPath string) bool {
// if !isSymlink(f) {
// return false
// }
// // TODO: Ensure path is sanitized
// target:= path.Join(root, urlPath, f.Name()))
// targetInfo, err := os.Stat(target)
// if err != nil {
// return false
// }
// return targetInfo.IsDir()
return false
}
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