From 6f262a198cb0af8e4262d5007a7c1e8f8d9fe205 Mon Sep 17 00:00:00 2001
From: Pablo Hoffman <pablo@pablohoffman.com>
Date: Tue, 12 Apr 2011 18:12:36 -0300
Subject: [PATCH] Added IOError to the list of exceptions to retry in the
 RetryMiddleware

---
 scrapy/contrib/downloadermiddleware/retry.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/scrapy/contrib/downloadermiddleware/retry.py b/scrapy/contrib/downloadermiddleware/retry.py
index c8d44dffe..f1ab5ab10 100644
--- a/scrapy/contrib/downloadermiddleware/retry.py
+++ b/scrapy/contrib/downloadermiddleware/retry.py
@@ -30,9 +30,11 @@ from scrapy.conf import settings
 
 class RetryMiddleware(object):
 
+    # IOError is raised by the HttpCompression middleware when trying to
+    # decompress an empty response
     EXCEPTIONS_TO_RETRY = (ServerTimeoutError, UserTimeoutError, DNSLookupError,
                            ConnectionRefusedError, ConnectionDone, ConnectError,
-                           ConnectionLost, PartialDownloadError)
+                           ConnectionLost, PartialDownloadError, IOError)
 
     def __init__(self):
         self.max_retry_times = settings.getint('RETRY_TIMES')