diff --git a/app/pdf-viewer/buffer.py b/app/pdf-viewer/buffer.py
index dd328b1..a8d69e4 100755
--- a/app/pdf-viewer/buffer.py
+++ b/app/pdf-viewer/buffer.py
@@ -113,9 +113,6 @@ class AppBuffer(Buffer):
     def toggle_inverted_mode(self):
         self.buffer_widget.toggle_inverted_mode()
 
-    def get_bookmark(self):
-        return self.buffer_widget.url
-
 class PdfViewerWidget(QWidget):
     translate_double_click_word = QtCore.pyqtSignal(str)
 
diff --git a/core/browser_buffer.py b/core/browser_buffer.py
index ca34608..850c6c0 100755
--- a/core/browser_buffer.py
+++ b/core/browser_buffer.py
@@ -94,7 +94,5 @@ class BrowserBuffer(Buffer):
     def refresh_page(self):
         self.eval_js("location.reload()")
 
-    def get_bookmark(self):
+    def get_url(self):
         return self.buffer_widget.web_page.executeJavaScript("window.location.href;")
-
-
diff --git a/core/buffer.py b/core/buffer.py
index a7eb993..712e7aa 100755
--- a/core/buffer.py
+++ b/core/buffer.py
@@ -291,5 +291,5 @@ class Buffer(QGraphicsScene):
     def update_settings(self):
         pass
 
-    def get_bookmark(self):
-        return ""
+    def get_url(self):
+        return self.url
diff --git a/docs/HACKING.md b/docs/HACKING.md
index c87c1f2..50bc396 100644
--- a/docs/HACKING.md
+++ b/docs/HACKING.md
@@ -238,17 +238,17 @@ Above is an example of ```eaf-camera-save-path```, you can customize any variabl
 
 ### Call Python method and store function result to temp Elisp variable
 
-In EAF buffer have interface ```get_bookmark```
+In EAF buffer have interface ```get_url```
 
 ```Python
-def get_bookmark(self):
+def get_url(self):
     return ""
 ```
 
 At Elisp side, we can use below code call Python method and store function result to Elisp variable:
 
 ```Elisp
-(setq temp-var (eaf-call "call_function" eaf--buffer-id "get_bookmark"))
+(setq temp-var (eaf-call "call_function" eaf--buffer-id "get_url"))
 ```
 
 Once you understand principle, you can define your own interface function in core/buffer.py , then use ```call_function``` method on Elisp side to fetch Python function result, don't need define temp elisp variable everywhere.
diff --git a/eaf.el b/eaf.el
index c650053..00bc381 100644
--- a/eaf.el
+++ b/eaf.el
@@ -7,7 +7,7 @@
 ;; Copyright (C) 2018, Andy Stewart, all rights reserved.
 ;; Created: 2018-06-15 14:10:12
 ;; Version: 0.5
-;; Last-Updated: Fri Dec 13 22:57:38 2019 (-0500)
+;; Last-Updated: Sat Dec 14 17:34:32 2019 (-0500)
 ;;           By: Mingde (Matthew) Zeng
 ;; URL: http://www.emacswiki.org/emacs/download/eaf.el
 ;; Keywords:
@@ -355,15 +355,13 @@ For now only EAF browser app is supported."
   `((handler . eaf--bookmark-restore)
     (eaf-app . "browser")
     (defaults . ,(list eaf--bookmark-title))
-    (filename . ,(eaf-call "call_function"
-                           eaf--buffer-id "get_bookmark"))))
+    (filename . ,(eaf-get-path-or-url))))
 
 (defun eaf--pdf-viewer-bookmark ()
   `((handler . eaf--bookmark-restore)
     (eaf-app . "pdf-viewer")
     (defaults . ,(list eaf--bookmark-title))
-    (filename . ,(eaf-call "call_function"
-                           eaf--buffer-id "get_bookmark"))))
+    (filename . ,(eaf-get-path-or-url))))
 
 (defun eaf--bookmark-restore (bookmark)
   "Restore EAF buffer according to BOOKMARK."
@@ -500,6 +498,12 @@ buffer."
     (let ((this-command cmd))
       (call-interactively cmd))))
 
+(defun eaf-get-path-or-url ()
+  "Get the current file path or web URL, and copy to ‘kill-ring’."
+  (interactive)
+  (if (derived-mode-p 'eaf-mode)
+      (message (kill-new (eaf-call "call_function" eaf--buffer-id "get_url")))
+    (user-error "This command can only be called in an EAF buffer!")))
 
 (defun eaf-proxy-function (fun)
   "Define elisp command which can call python function FUN."