Append random number to uploaded file names to avoid overwriting files

index.js

@@ -5,7 +5,11 @@ app.use(require("multer")(
   {
     dest: __dirname + '/public/uploads',
     rename: function(fieldname, filename) {
-      return filename;
+      // Append a random number to the file name to avoid overwriting 
+      // files with the same name. This is especially important since some 
+      // devices (such as the iPad) name all images image.jpeg, even when 
+      // multiple images are uploaded with one HTTP request.
+      return filename + "-" + Math.floor(Math.random()*1000000000);
     }
 }));
 app.use(require("body-parser").json());

views/upload.jade

@@ -5,14 +5,13 @@ block content
 
   p Select files or paste text into the textbox (or both). Then click the upload button.
 
-  form(action="/upload" method="post" enctype="multipart/form-data")
+  form(action="/upload", method="post", enctype="multipart/form-data")
 
     h2 Text upload
     textarea(rows="10", name="text")
 
     h2 File upload
-    p Warning: If you upload two files with the same name, the second will overwrite the first!
-    input(type="file" name="files" multiple)
+    input(type="file", name="files", multiple)
 
     h2 Upload it