# HG changeset patch
# User Aurelien Campeas <aurelien.campeas@logilab.fr>
# Date 1388683831 -3600
# Node ID 8e87f1e18a37edb2c71519e48b12bbbe3fff0824
# Parent  d7e8293fa4de7e80269e4bb99898e807c89816cb
[views/workflow/tmppng] fix console crash on nth call to this one-shot view

The underlying design issue is not addressed here, only a cosmetic and
"we understand and document what's happening" note.

Related to #3400448.

diff -r d7e8293fa4de -r 8e87f1e18a37 web/views/workflow.py
--- a/web/views/workflow.py	Tue Dec 10 11:44:06 2013 +0000
+++ b/web/views/workflow.py	Thu Jan 02 18:30:31 2014 +0100
@@ -442,6 +442,13 @@
     binary = True
 
     def cell_call(self, row=0, col=0):
-        tmpfile = self._cw.session.data[self._cw.form['tmpfile']]
+        key = self._cw.form['tmpfile']
+        if key not in self._cw.session.data:
+            # the temp file is gone and there's nothing
+            # we can do about it
+            # we should probably write it to some well
+            # behaved place and serve it
+            return
+        tmpfile = self._cw.session.data.pop(key)
         self.w(open(tmpfile, 'rb').read())
         os.unlink(tmpfile)