diff options
Diffstat (limited to 'modules/caddyhttp/fileserver/staticfiles.go')
| -rw-r--r-- | modules/caddyhttp/fileserver/staticfiles.go | 164 |
1 files changed, 8 insertions, 156 deletions
diff --git a/modules/caddyhttp/fileserver/staticfiles.go b/modules/caddyhttp/fileserver/staticfiles.go index a7c72c9..761dfc3 100644 --- a/modules/caddyhttp/fileserver/staticfiles.go +++ b/modules/caddyhttp/fileserver/staticfiles.go @@ -42,27 +42,15 @@ func init() { // FileServer implements a static file server responder for Caddy. type FileServer struct { - Root string `json:"root,omitempty"` // default is current directory - Hide []string `json:"hide,omitempty"` - IndexNames []string `json:"index_names,omitempty"` - Files []string `json:"files,omitempty"` // all relative to the root; default is request URI path - SelectionPolicy string `json:"selection_policy,omitempty"` - Rehandle bool `json:"rehandle,omitempty"` // issue a rehandle (internal redirect) if request is rewritten - Fallback caddyhttp.RouteList `json:"fallback,omitempty"` - Browse *Browse `json:"browse,omitempty"` - // TODO: Etag + Root string `json:"root,omitempty"` // default is current directory + Hide []string `json:"hide,omitempty"` + IndexNames []string `json:"index_names,omitempty"` + Browse *Browse `json:"browse,omitempty"` // TODO: Content negotiation } // Provision sets up the static files responder. func (fsrv *FileServer) Provision(ctx caddy.Context) error { - if fsrv.Fallback != nil { - err := fsrv.Fallback.Provision(ctx) - if err != nil { - return fmt.Errorf("setting up fallback routes: %v", err) - } - } - if fsrv.IndexNames == nil { fsrv.IndexNames = defaultIndexNames } @@ -87,50 +75,14 @@ func (fsrv *FileServer) Provision(ctx caddy.Context) error { return nil } -const ( - selectionPolicyFirstExisting = "first_existing" - selectionPolicyLargestSize = "largest_size" - selectionPolicySmallestSize = "smallest_size" - selectionPolicyRecentlyMod = "most_recently_modified" -) - -// Validate ensures that sf has a valid configuration. -func (fsrv *FileServer) Validate() error { - switch fsrv.SelectionPolicy { - case "", - selectionPolicyFirstExisting, - selectionPolicyLargestSize, - selectionPolicySmallestSize, - selectionPolicyRecentlyMod: - default: - return fmt.Errorf("unknown selection policy %s", fsrv.SelectionPolicy) - } - return nil -} - func (fsrv *FileServer) ServeHTTP(w http.ResponseWriter, r *http.Request, _ caddyhttp.Handler) error { repl := r.Context().Value(caddy.ReplacerCtxKey).(caddy.Replacer) filesToHide := fsrv.transformHidePaths(repl) - // map the request to a filename - pathBefore := r.URL.Path - filename := fsrv.selectFile(r, repl, filesToHide) - if filename == "" { - // no files worked, so resort to fallback - if fsrv.Fallback != nil { - fallback := fsrv.Fallback.BuildCompositeRoute(w, r) - return fallback.ServeHTTP(w, r) - } - return caddyhttp.Error(http.StatusNotFound, nil) - } - - // if the ultimate destination has changed, submit - // this request for a rehandling (internal redirect) - // if configured to do so - if r.URL.Path != pathBefore && fsrv.Rehandle { - return caddyhttp.ErrRehandle - } + root := repl.ReplaceAll(fsrv.Root, "") + suffix := repl.ReplaceAll(r.URL.Path, "") + filename := sanitizedPathJoin(root, suffix) // get information about the file info, err := os.Stat(filename) @@ -161,12 +113,8 @@ func (fsrv *FileServer) ServeHTTP(w http.ResponseWriter, r *http.Request, _ cadd } // we found an index file that might work, - // so rewrite the request path and, if - // configured, do an internal redirect + // so rewrite the request path r.URL.Path = path.Join(r.URL.Path, indexPage) - if fsrv.Rehandle { - return caddyhttp.ErrRehandle - } info = indexInfo filename = indexPath @@ -308,107 +256,12 @@ func sanitizedPathJoin(root, reqPath string) string { return filepath.Join(root, filepath.FromSlash(path.Clean("/"+reqPath))) } -// selectFile uses the specified selection policy (or first_existing -// by default) to map the request r to a filename. The full path to -// the file is returned if one is found; otherwise, an empty string -// is returned. -func (fsrv *FileServer) selectFile(r *http.Request, repl caddy.Replacer, filesToHide []string) string { - root := repl.ReplaceAll(fsrv.Root, "") - - if fsrv.Files == nil { - return sanitizedPathJoin(root, r.URL.Path) - } - - switch fsrv.SelectionPolicy { - case "", selectionPolicyFirstExisting: - filesToHide := fsrv.transformHidePaths(repl) - for _, f := range fsrv.Files { - suffix := repl.ReplaceAll(f, "") - fullpath := sanitizedPathJoin(root, suffix) - if !fileHidden(fullpath, filesToHide) && fileExists(fullpath) { - r.URL.Path = suffix - return fullpath - } - } - - case selectionPolicyLargestSize: - var largestSize int64 - var largestFilename string - var largestSuffix string - for _, f := range fsrv.Files { - suffix := repl.ReplaceAll(f, "") - fullpath := sanitizedPathJoin(root, suffix) - if fileHidden(fullpath, filesToHide) { - continue - } - info, err := os.Stat(fullpath) - if err == nil && info.Size() > largestSize { - largestSize = info.Size() - largestFilename = fullpath - largestSuffix = suffix - } - } - r.URL.Path = largestSuffix - return largestFilename - - case selectionPolicySmallestSize: - var smallestSize int64 - var smallestFilename string - var smallestSuffix string - for _, f := range fsrv.Files { - suffix := repl.ReplaceAll(f, "") - fullpath := sanitizedPathJoin(root, suffix) - if fileHidden(fullpath, filesToHide) { - continue - } - info, err := os.Stat(fullpath) - if err == nil && (smallestSize == 0 || info.Size() < smallestSize) { - smallestSize = info.Size() - smallestFilename = fullpath - smallestSuffix = suffix - } - } - r.URL.Path = smallestSuffix - return smallestFilename - - case selectionPolicyRecentlyMod: - var recentDate time.Time - var recentFilename string - var recentSuffix string - for _, f := range fsrv.Files { - suffix := repl.ReplaceAll(f, "") - fullpath := sanitizedPathJoin(root, suffix) - if fileHidden(fullpath, filesToHide) { - continue - } - info, err := os.Stat(fullpath) - if err == nil && - (recentDate.IsZero() || info.ModTime().After(recentDate)) { - recentDate = info.ModTime() - recentFilename = fullpath - recentSuffix = suffix - } - } - r.URL.Path = recentSuffix - return recentFilename - } - - return "" -} - -// fileExists returns true if file exists. -func fileExists(file string) bool { - _, err := os.Stat(file) - return !os.IsNotExist(err) -} - // fileHidden returns true if filename is hidden // according to the hide list. func fileHidden(filename string, hide []string) bool { nameOnly := filepath.Base(filename) sep := string(filepath.Separator) - // see if file is hidden for _, h := range hide { // assuming h is a glob/shell-like pattern, // use it to compare the whole file path; @@ -453,6 +306,5 @@ const minBackoff, maxBackoff = 2, 5 // Interface guards var ( _ caddy.Provisioner = (*FileServer)(nil) - _ caddy.Validator = (*FileServer)(nil) _ caddyhttp.MiddlewareHandler = (*FileServer)(nil) ) |