Fixed #18481 -- Wrapped request.FILES read error in UnreadablePostError

Thanks KyleMac for the report, André Cruz for the initial patch and
Hiroki Kiyohara for the tests.

1 files changed, 8 insertions, 2 deletions

diff --git a/django/http/request.py b/django/http/request.py
index e6811aa6cc..37aa1a355a 100644
--- a/django/http/request.py
+++ b/django/http/request.py
@@ -238,11 +238,17 @@ class HttpRequest(object):
 
     def read(self, *args, **kwargs):
         self._read_started = True
-        return self._stream.read(*args, **kwargs)
+        try:
+            return self._stream.read(*args, **kwargs)
+        except IOError as e:
+            six.reraise(UnreadablePostError, UnreadablePostError(*e.args), sys.exc_info()[2])
 
     def readline(self, *args, **kwargs):
         self._read_started = True
-        return self._stream.readline(*args, **kwargs)
+        try:
+            return self._stream.readline(*args, **kwargs)
+        except IOError as e:
+            six.reraise(UnreadablePostError, UnreadablePostError(*e.args), sys.exc_info()[2])
 
     def xreadlines(self):
         while True: