From c6ae62cb67ef957fea5bf0e0bcd0a3201a2d6b4d Mon Sep 17 00:00:00 2001
From: mike <mike@7a7537e8-13f0-0310-91df-b6672ffda945>
Date: Thu, 13 Dec 2012 19:57:25 +0000
Subject: [PATCH] The CUPS library did not always detect a timed out connection
 to the server which could cause temporary loss of printing from applications
 (STR #4187)

git-svn-id: http://svn.easysw.com/public/cups/trunk@10760 7a7537e8-13f0-0310-91df-b6672ffda945
diff --git a/cups/request.c b/cups/request.c
index a04fbb3..f81785d 100644
--- a/cups/request.c
+++ b/cups/request.c
@@ -1007,6 +1007,25 @@ _cupsConnect(void)
       httpClose(cg->http);
       cg->http = NULL;
     }
+    else
+    {
+     /*
+      * Same server, see if the connection is still established...
+      */
+
+      char ch;				/* Connection check byte */
+
+      if (recv(cg->http->fd, &ch, 1, MSG_PEEK | MSG_DONTWAIT) < 0 &&
+          errno != EWOULDBLOCK)
+      {
+       /*
+        * Nope, close the connection...
+        */
+
+	httpClose(cg->http);
+	cg->http = NULL;
+      }
+    }
   }
 
  /*
-- 
1.8.0.1