[damned-lies] Check for file existence in vertimus diff view

[Claude Paroz <claudep src gnome org>]

commit a9a5e2d5f1ec645b615152150a1ab4a41db3f479
Author: Claude Paroz <claude 2xlibre net>
Date:   Wed Aug 15 09:05:55 2012 +0200

    Check for file existence in vertimus diff view

 vertimus/views.py |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/vertimus/views.py b/vertimus/views.py
index 7c01614..5b4b0bb 100644
--- a/vertimus/views.py
+++ b/vertimus/views.py
@@ -19,6 +19,8 @@
 # along with Damned Lies; if not, write to the Free Software Foundation, Inc.,
 # 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
+import os
+
 from django.conf import settings
 from django.core import urlresolvers
 from django.http import HttpResponseRedirect, Http404
@@ -150,6 +152,8 @@ def vertimus_diff(request, action_id_1, action_id_2, level):
 
     file_path_1 = action_1.merged_file and action_1.merged_file.path or action_1.file.path
     reduced = is_po_reduced(file_path_1)
+    if not os.path.exists(file_path_1):
+        raise Http404("File not found")
 
     try:
         content_1 = [l.decode('utf-8') for l in open(file_path_1, 'U').readlines()]
@@ -183,6 +187,8 @@ def vertimus_diff(request, action_id_1, action_id_2, level):
                 stats = get_object_or_404(Statistics, branch=state.branch, domain=state.domain, language=None)
                 descr_2 = _("Latest POT file")
             file_path_2 = stats.po_path(reduced=reduced)
+    if not os.path.exists(file_path_2):
+        raise Http404("File not found")
     try:
         content_2 = [l.decode('utf-8') for l in open(file_path_2, 'U').readlines()]
     except UnicodeDecodeError: