impl attach

server/attach.go

@@ -0,0 +1,48 @@
+package server
+
+import (
+	"errors"
+	"io"
+	"local/notes-server/filetree"
+	"net/http"
+	"os"
+	"path"
+	"strings"
+)
+
+func (s *Server) attach(w http.ResponseWriter, r *http.Request) {
+	if err := s._attach(w, r); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
+}
+
+func (s *Server) _attach(w http.ResponseWriter, r *http.Request) error {
+	r.ParseMultipartForm(100 << 20)
+	file, handler, err := r.FormFile("file")
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	ft := filetree.NewPathFromURL(r.URL.Path)
+	local := ft.Local
+	target := path.Join(path.Dir(local), "."+path.Base(local)+".attachments", handler.Filename)
+
+	os.MkdirAll(path.Dir(target), os.ModePerm)
+	if fi, err := os.Stat(target); err != nil && !os.IsNotExist(err) {
+		return err
+	} else if err == nil && fi.IsDir() {
+		return errors.New("invalid path")
+	}
+	f, err := os.Create(target)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	if _, err := io.Copy(f, file); err != nil {
+		return err
+	}
+
+	http.Redirect(w, r, "/notes"+strings.TrimPrefix(ft.HREF, "/attach"), http.StatusSeeOther)
+	return nil
+}

server/notes.go

@@ -89,7 +89,7 @@ func (s *Server) htmlAttachments(w http.ResponseWriter, urlPath string) {
             <input type="file" name="file" required/>
             <input type="submit" value="+"/>
          </form>
-   `, strings.TrimPrefix(urlPath, "/"))
+   `, strings.TrimPrefix(urlPath, "/notes/"))
 	if config.ReadOnly {
 		form = ""
 	}

server/routes.go

@@ -33,6 +33,9 @@ func (s *Server) Routes() error {
 		fmt.Sprintf("create/%s%s", wildcard, wildcard): {
 			handler: s.gzip(s.authenticate(s.create)),
 		},
+		fmt.Sprintf("attach/%s%s", wildcard, wildcard): {
+			handler: s.gzip(s.authenticate(s.attach)),
+		},
 		fmt.Sprintf("comment/%s%s", wildcard, wildcard): {
 			handler: s.gzip(s.authenticate(s.comment)),
 		},
@@ -43,7 +46,13 @@ func (s *Server) Routes() error {
 
 	for path, endpoint := range endpoints {
 		if config.ReadOnly {
-			for _, prefix := range []string{"edit/", "delete/", "delete/", "create/", "submit/"} {
+			for _, prefix := range []string{
+				"edit/",
+				"delete/",
+				"create/",
+				"submit/",
+				"attach/",
+			} {
 				if strings.HasPrefix(path, prefix) {
 					endpoint.handler = http.NotFound
 				}