[FIX] web: NFD UTF-8 for safari in upload file

Before this commit, when uploading a file as attachment in Safari,
The file icon kept on showing 'downloading' whereas the request was successful

This was because the return from the server had a different UTF-8 norm than Safari

After this commit, it works well

OPW 1836545
closes #24307

addons/web/controllers/main.py

@@ -19,6 +19,7 @@ import time
 import zlib
 from xml.etree import ElementTree
 from cStringIO import StringIO
+import unicodedata
 
 import babel.messages.pofile
 import werkzeug.utils
@@ -1069,16 +1070,23 @@ class Binary(http.Controller):
                     var win = window.top.window;
                     win.jQuery(win).trigger(%s, %s);
                 </script>"""
+
+        filename = ufile.filename
+        if request.httprequest.user_agent.browser == 'safari':
+            # Safari sends NFD UTF-8 (where é is composed by 'e' and [accent])
+            # we need to send it the same stuff, otherwise it'll fail
+            filename = unicodedata.normalize('NFD', ufile.filename).encode('UTF-8')
+
         try:
             attachment_id = Model.create({
-                'name': ufile.filename,
+                'name': filename,
                 'datas': base64.encodestring(ufile.read()),
-                'datas_fname': ufile.filename,
+                'datas_fname': filename,
                 'res_model': model,
                 'res_id': int(id)
             }, request.context)
             args = {
-                'filename': ufile.filename,
+                'filename': filename,
                 'mimetype': ufile.content_type,
                 'id':  attachment_id
             }